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Version: nginx-1.13.12 ]​[ nginx-1.12.2 ]​

0001 
0002 /*
0003  * Copyright (C) Igor Sysoev
0004  * Copyright (C) Nginx, Inc.
0005  */
0006 
0007 
0008 #include <ngx_config.h>
0009 #include <ngx_core.h>
0010 #include <ngx_http.h>
0011 
0012 
0013 typedef struct {
0014     u_char    *name;
0015     uint32_t   method;
0016 } ngx_http_method_name_t;
0017 
0018 
0019 #define NGX_HTTP_REQUEST_BODY_FILE_OFF    0
0020 #define NGX_HTTP_REQUEST_BODY_FILE_ON     1
0021 #define NGX_HTTP_REQUEST_BODY_FILE_CLEAN  2
0022 
0023 
0024 static ngx_int_t ngx_http_core_find_location(ngx_http_request_t *r);
0025 static ngx_int_t ngx_http_core_find_static_location(ngx_http_request_t *r,
0026     ngx_http_location_tree_node_t *node);
0027 
0028 static ngx_int_t ngx_http_core_preconfiguration(ngx_conf_t *cf);
0029 static ngx_int_t ngx_http_core_postconfiguration(ngx_conf_t *cf);
0030 static void *ngx_http_core_create_main_conf(ngx_conf_t *cf);
0031 static char *ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf);
0032 static void *ngx_http_core_create_srv_conf(ngx_conf_t *cf);
0033 static char *ngx_http_core_merge_srv_conf(ngx_conf_t *cf,
0034     void *parent, void *child);
0035 static void *ngx_http_core_create_loc_conf(ngx_conf_t *cf);
0036 static char *ngx_http_core_merge_loc_conf(ngx_conf_t *cf,
0037     void *parent, void *child);
0038 
0039 static char *ngx_http_core_server(ngx_conf_t *cf, ngx_command_t *cmd,
0040     void *dummy);
0041 static char *ngx_http_core_location(ngx_conf_t *cf, ngx_command_t *cmd,
0042     void *dummy);
0043 static ngx_int_t ngx_http_core_regex_location(ngx_conf_t *cf,
0044     ngx_http_core_loc_conf_t *clcf, ngx_str_t *regex, ngx_uint_t caseless);
0045 
0046 static char *ngx_http_core_types(ngx_conf_t *cf, ngx_command_t *cmd,
0047     void *conf);
0048 static char *ngx_http_core_type(ngx_conf_t *cf, ngx_command_t *dummy,
0049     void *conf);
0050 
0051 static char *ngx_http_core_listen(ngx_conf_t *cf, ngx_command_t *cmd,
0052     void *conf);
0053 static char *ngx_http_core_server_name(ngx_conf_t *cf, ngx_command_t *cmd,
0054     void *conf);
0055 static char *ngx_http_core_root(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
0056 static char *ngx_http_core_limit_except(ngx_conf_t *cf, ngx_command_t *cmd,
0057     void *conf);
0058 static char *ngx_http_core_set_aio(ngx_conf_t *cf, ngx_command_t *cmd,
0059     void *conf);
0060 static char *ngx_http_core_directio(ngx_conf_t *cf, ngx_command_t *cmd,
0061     void *conf);
0062 static char *ngx_http_core_error_page(ngx_conf_t *cf, ngx_command_t *cmd,
0063     void *conf);
0064 static char *ngx_http_core_try_files(ngx_conf_t *cf, ngx_command_t *cmd,
0065     void *conf);
0066 static char *ngx_http_core_open_file_cache(ngx_conf_t *cf, ngx_command_t *cmd,
0067     void *conf);
0068 static char *ngx_http_core_error_log(ngx_conf_t *cf, ngx_command_t *cmd,
0069     void *conf);
0070 static char *ngx_http_core_keepalive(ngx_conf_t *cf, ngx_command_t *cmd,
0071     void *conf);
0072 static char *ngx_http_core_internal(ngx_conf_t *cf, ngx_command_t *cmd,
0073     void *conf);
0074 static char *ngx_http_core_resolver(ngx_conf_t *cf, ngx_command_t *cmd,
0075     void *conf);
0076 #if (NGX_HTTP_GZIP)
0077 static ngx_int_t ngx_http_gzip_accept_encoding(ngx_str_t *ae);
0078 static ngx_uint_t ngx_http_gzip_quantity(u_char *p, u_char *last);
0079 static char *ngx_http_gzip_disable(ngx_conf_t *cf, ngx_command_t *cmd,
0080     void *conf);
0081 #endif
0082 static ngx_int_t ngx_http_get_forwarded_addr_internal(ngx_http_request_t *r,
0083     ngx_addr_t *addr, u_char *xff, size_t xfflen, ngx_array_t *proxies,
0084     int recursive);
0085 #if (NGX_HAVE_OPENAT)
0086 static char *ngx_http_disable_symlinks(ngx_conf_t *cf, ngx_command_t *cmd,
0087     void *conf);
0088 #endif
0089 
0090 static char *ngx_http_core_lowat_check(ngx_conf_t *cf, void *post, void *data);
0091 static char *ngx_http_core_pool_size(ngx_conf_t *cf, void *post, void *data);
0092 
0093 static ngx_conf_post_t  ngx_http_core_lowat_post =
0094     { ngx_http_core_lowat_check };
0095 
0096 static ngx_conf_post_handler_pt  ngx_http_core_pool_size_p =
0097     ngx_http_core_pool_size;
0098 
0099 
0100 static ngx_conf_enum_t  ngx_http_core_request_body_in_file[] = {
0101     { ngx_string("off"), NGX_HTTP_REQUEST_BODY_FILE_OFF },
0102     { ngx_string("on"), NGX_HTTP_REQUEST_BODY_FILE_ON },
0103     { ngx_string("clean"), NGX_HTTP_REQUEST_BODY_FILE_CLEAN },
0104     { ngx_null_string, 0 }
0105 };
0106 
0107 
0108 static ngx_conf_enum_t  ngx_http_core_satisfy[] = {
0109     { ngx_string("all"), NGX_HTTP_SATISFY_ALL },
0110     { ngx_string("any"), NGX_HTTP_SATISFY_ANY },
0111     { ngx_null_string, 0 }
0112 };
0113 
0114 
0115 static ngx_conf_enum_t  ngx_http_core_lingering_close[] = {
0116     { ngx_string("off"), NGX_HTTP_LINGERING_OFF },
0117     { ngx_string("on"), NGX_HTTP_LINGERING_ON },
0118     { ngx_string("always"), NGX_HTTP_LINGERING_ALWAYS },
0119     { ngx_null_string, 0 }
0120 };
0121 
0122 
0123 static ngx_conf_enum_t  ngx_http_core_server_tokens[] = {
0124     { ngx_string("off"), NGX_HTTP_SERVER_TOKENS_OFF },
0125     { ngx_string("on"), NGX_HTTP_SERVER_TOKENS_ON },
0126     { ngx_string("build"), NGX_HTTP_SERVER_TOKENS_BUILD },
0127     { ngx_null_string, 0 }
0128 };
0129 
0130 
0131 static ngx_conf_enum_t  ngx_http_core_if_modified_since[] = {
0132     { ngx_string("off"), NGX_HTTP_IMS_OFF },
0133     { ngx_string("exact"), NGX_HTTP_IMS_EXACT },
0134     { ngx_string("before"), NGX_HTTP_IMS_BEFORE },
0135     { ngx_null_string, 0 }
0136 };
0137 
0138 
0139 static ngx_conf_bitmask_t  ngx_http_core_keepalive_disable[] = {
0140     { ngx_string("none"), NGX_HTTP_KEEPALIVE_DISABLE_NONE },
0141     { ngx_string("msie6"), NGX_HTTP_KEEPALIVE_DISABLE_MSIE6 },
0142     { ngx_string("safari"), NGX_HTTP_KEEPALIVE_DISABLE_SAFARI },
0143     { ngx_null_string, 0 }
0144 };
0145 
0146 
0147 static ngx_path_init_t  ngx_http_client_temp_path = {
0148     ngx_string(NGX_HTTP_CLIENT_TEMP_PATH), { 0, 0, 0 }
0149 };
0150 
0151 
0152 #if (NGX_HTTP_GZIP)
0153 
0154 static ngx_conf_enum_t  ngx_http_gzip_http_version[] = {
0155     { ngx_string("1.0"), NGX_HTTP_VERSION_10 },
0156     { ngx_string("1.1"), NGX_HTTP_VERSION_11 },
0157     { ngx_null_string, 0 }
0158 };
0159 
0160 
0161 static ngx_conf_bitmask_t  ngx_http_gzip_proxied_mask[] = {
0162     { ngx_string("off"), NGX_HTTP_GZIP_PROXIED_OFF },
0163     { ngx_string("expired"), NGX_HTTP_GZIP_PROXIED_EXPIRED },
0164     { ngx_string("no-cache"), NGX_HTTP_GZIP_PROXIED_NO_CACHE },
0165     { ngx_string("no-store"), NGX_HTTP_GZIP_PROXIED_NO_STORE },
0166     { ngx_string("private"), NGX_HTTP_GZIP_PROXIED_PRIVATE },
0167     { ngx_string("no_last_modified"), NGX_HTTP_GZIP_PROXIED_NO_LM },
0168     { ngx_string("no_etag"), NGX_HTTP_GZIP_PROXIED_NO_ETAG },
0169     { ngx_string("auth"), NGX_HTTP_GZIP_PROXIED_AUTH },
0170     { ngx_string("any"), NGX_HTTP_GZIP_PROXIED_ANY },
0171     { ngx_null_string, 0 }
0172 };
0173 
0174 
0175 static ngx_str_t  ngx_http_gzip_no_cache = ngx_string("no-cache");
0176 static ngx_str_t  ngx_http_gzip_no_store = ngx_string("no-store");
0177 static ngx_str_t  ngx_http_gzip_private = ngx_string("private");
0178 
0179 #endif
0180 
0181 
0182 static ngx_command_t  ngx_http_core_commands[] = {
0183 
0184     { ngx_string("variables_hash_max_size"),
0185       NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
0186       ngx_conf_set_num_slot,
0187       NGX_HTTP_MAIN_CONF_OFFSET,
0188       offsetof(ngx_http_core_main_conf_t, variables_hash_max_size),
0189       NULL },
0190 
0191     { ngx_string("variables_hash_bucket_size"),
0192       NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
0193       ngx_conf_set_num_slot,
0194       NGX_HTTP_MAIN_CONF_OFFSET,
0195       offsetof(ngx_http_core_main_conf_t, variables_hash_bucket_size),
0196       NULL },
0197 
0198     { ngx_string("server_names_hash_max_size"),
0199       NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
0200       ngx_conf_set_num_slot,
0201       NGX_HTTP_MAIN_CONF_OFFSET,
0202       offsetof(ngx_http_core_main_conf_t, server_names_hash_max_size),
0203       NULL },
0204 
0205     { ngx_string("server_names_hash_bucket_size"),
0206       NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE1,
0207       ngx_conf_set_num_slot,
0208       NGX_HTTP_MAIN_CONF_OFFSET,
0209       offsetof(ngx_http_core_main_conf_t, server_names_hash_bucket_size),
0210       NULL },
0211 
0212     { ngx_string("server"),
0213       NGX_HTTP_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS,
0214       ngx_http_core_server,
0215       0,
0216       0,
0217       NULL },
0218 
0219     { ngx_string("connection_pool_size"),
0220       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
0221       ngx_conf_set_size_slot,
0222       NGX_HTTP_SRV_CONF_OFFSET,
0223       offsetof(ngx_http_core_srv_conf_t, connection_pool_size),
0224       &ngx_http_core_pool_size_p },
0225 
0226     { ngx_string("request_pool_size"),
0227       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
0228       ngx_conf_set_size_slot,
0229       NGX_HTTP_SRV_CONF_OFFSET,
0230       offsetof(ngx_http_core_srv_conf_t, request_pool_size),
0231       &ngx_http_core_pool_size_p },
0232 
0233     { ngx_string("client_header_timeout"),
0234       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
0235       ngx_conf_set_msec_slot,
0236       NGX_HTTP_SRV_CONF_OFFSET,
0237       offsetof(ngx_http_core_srv_conf_t, client_header_timeout),
0238       NULL },
0239 
0240     { ngx_string("client_header_buffer_size"),
0241       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE1,
0242       ngx_conf_set_size_slot,
0243       NGX_HTTP_SRV_CONF_OFFSET,
0244       offsetof(ngx_http_core_srv_conf_t, client_header_buffer_size),
0245       NULL },
0246 
0247     { ngx_string("large_client_header_buffers"),
0248       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_TAKE2,
0249       ngx_conf_set_bufs_slot,
0250       NGX_HTTP_SRV_CONF_OFFSET,
0251       offsetof(ngx_http_core_srv_conf_t, large_client_header_buffers),
0252       NULL },
0253 
0254     { ngx_string("ignore_invalid_headers"),
0255       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
0256       ngx_conf_set_flag_slot,
0257       NGX_HTTP_SRV_CONF_OFFSET,
0258       offsetof(ngx_http_core_srv_conf_t, ignore_invalid_headers),
0259       NULL },
0260 
0261     { ngx_string("merge_slashes"),
0262       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
0263       ngx_conf_set_flag_slot,
0264       NGX_HTTP_SRV_CONF_OFFSET,
0265       offsetof(ngx_http_core_srv_conf_t, merge_slashes),
0266       NULL },
0267 
0268     { ngx_string("underscores_in_headers"),
0269       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_CONF_FLAG,
0270       ngx_conf_set_flag_slot,
0271       NGX_HTTP_SRV_CONF_OFFSET,
0272       offsetof(ngx_http_core_srv_conf_t, underscores_in_headers),
0273       NULL },
0274 
0275     { ngx_string("location"),
0276       NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_TAKE12,
0277       ngx_http_core_location,
0278       NGX_HTTP_SRV_CONF_OFFSET,
0279       0,
0280       NULL },
0281 
0282     { ngx_string("listen"),
0283       NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
0284       ngx_http_core_listen,
0285       NGX_HTTP_SRV_CONF_OFFSET,
0286       0,
0287       NULL },
0288 
0289     { ngx_string("server_name"),
0290       NGX_HTTP_SRV_CONF|NGX_CONF_1MORE,
0291       ngx_http_core_server_name,
0292       NGX_HTTP_SRV_CONF_OFFSET,
0293       0,
0294       NULL },
0295 
0296     { ngx_string("types_hash_max_size"),
0297       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0298       ngx_conf_set_num_slot,
0299       NGX_HTTP_LOC_CONF_OFFSET,
0300       offsetof(ngx_http_core_loc_conf_t, types_hash_max_size),
0301       NULL },
0302 
0303     { ngx_string("types_hash_bucket_size"),
0304       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0305       ngx_conf_set_num_slot,
0306       NGX_HTTP_LOC_CONF_OFFSET,
0307       offsetof(ngx_http_core_loc_conf_t, types_hash_bucket_size),
0308       NULL },
0309 
0310     { ngx_string("types"),
0311       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF
0312                                           |NGX_CONF_BLOCK|NGX_CONF_NOARGS,
0313       ngx_http_core_types,
0314       NGX_HTTP_LOC_CONF_OFFSET,
0315       0,
0316       NULL },
0317 
0318     { ngx_string("default_type"),
0319       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0320       ngx_conf_set_str_slot,
0321       NGX_HTTP_LOC_CONF_OFFSET,
0322       offsetof(ngx_http_core_loc_conf_t, default_type),
0323       NULL },
0324 
0325     { ngx_string("root"),
0326       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
0327                         |NGX_CONF_TAKE1,
0328       ngx_http_core_root,
0329       NGX_HTTP_LOC_CONF_OFFSET,
0330       0,
0331       NULL },
0332 
0333     { ngx_string("alias"),
0334       NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0335       ngx_http_core_root,
0336       NGX_HTTP_LOC_CONF_OFFSET,
0337       0,
0338       NULL },
0339 
0340     { ngx_string("limit_except"),
0341       NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_1MORE,
0342       ngx_http_core_limit_except,
0343       NGX_HTTP_LOC_CONF_OFFSET,
0344       0,
0345       NULL },
0346 
0347     { ngx_string("client_max_body_size"),
0348       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0349       ngx_conf_set_off_slot,
0350       NGX_HTTP_LOC_CONF_OFFSET,
0351       offsetof(ngx_http_core_loc_conf_t, client_max_body_size),
0352       NULL },
0353 
0354     { ngx_string("client_body_buffer_size"),
0355       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0356       ngx_conf_set_size_slot,
0357       NGX_HTTP_LOC_CONF_OFFSET,
0358       offsetof(ngx_http_core_loc_conf_t, client_body_buffer_size),
0359       NULL },
0360 
0361     { ngx_string("client_body_timeout"),
0362       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0363       ngx_conf_set_msec_slot,
0364       NGX_HTTP_LOC_CONF_OFFSET,
0365       offsetof(ngx_http_core_loc_conf_t, client_body_timeout),
0366       NULL },
0367 
0368     { ngx_string("client_body_temp_path"),
0369       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
0370       ngx_conf_set_path_slot,
0371       NGX_HTTP_LOC_CONF_OFFSET,
0372       offsetof(ngx_http_core_loc_conf_t, client_body_temp_path),
0373       NULL },
0374 
0375     { ngx_string("client_body_in_file_only"),
0376       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0377       ngx_conf_set_enum_slot,
0378       NGX_HTTP_LOC_CONF_OFFSET,
0379       offsetof(ngx_http_core_loc_conf_t, client_body_in_file_only),
0380       &ngx_http_core_request_body_in_file },
0381 
0382     { ngx_string("client_body_in_single_buffer"),
0383       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0384       ngx_conf_set_flag_slot,
0385       NGX_HTTP_LOC_CONF_OFFSET,
0386       offsetof(ngx_http_core_loc_conf_t, client_body_in_single_buffer),
0387       NULL },
0388 
0389     { ngx_string("sendfile"),
0390       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
0391                         |NGX_CONF_FLAG,
0392       ngx_conf_set_flag_slot,
0393       NGX_HTTP_LOC_CONF_OFFSET,
0394       offsetof(ngx_http_core_loc_conf_t, sendfile),
0395       NULL },
0396 
0397     { ngx_string("sendfile_max_chunk"),
0398       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0399       ngx_conf_set_size_slot,
0400       NGX_HTTP_LOC_CONF_OFFSET,
0401       offsetof(ngx_http_core_loc_conf_t, sendfile_max_chunk),
0402       NULL },
0403 
0404     { ngx_string("aio"),
0405       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0406       ngx_http_core_set_aio,
0407       NGX_HTTP_LOC_CONF_OFFSET,
0408       0,
0409       NULL },
0410 
0411     { ngx_string("aio_write"),
0412       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0413       ngx_conf_set_flag_slot,
0414       NGX_HTTP_LOC_CONF_OFFSET,
0415       offsetof(ngx_http_core_loc_conf_t, aio_write),
0416       NULL },
0417 
0418     { ngx_string("read_ahead"),
0419       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0420       ngx_conf_set_size_slot,
0421       NGX_HTTP_LOC_CONF_OFFSET,
0422       offsetof(ngx_http_core_loc_conf_t, read_ahead),
0423       NULL },
0424 
0425     { ngx_string("directio"),
0426       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0427       ngx_http_core_directio,
0428       NGX_HTTP_LOC_CONF_OFFSET,
0429       0,
0430       NULL },
0431 
0432     { ngx_string("directio_alignment"),
0433       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0434       ngx_conf_set_off_slot,
0435       NGX_HTTP_LOC_CONF_OFFSET,
0436       offsetof(ngx_http_core_loc_conf_t, directio_alignment),
0437       NULL },
0438 
0439     { ngx_string("tcp_nopush"),
0440       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0441       ngx_conf_set_flag_slot,
0442       NGX_HTTP_LOC_CONF_OFFSET,
0443       offsetof(ngx_http_core_loc_conf_t, tcp_nopush),
0444       NULL },
0445 
0446     { ngx_string("tcp_nodelay"),
0447       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0448       ngx_conf_set_flag_slot,
0449       NGX_HTTP_LOC_CONF_OFFSET,
0450       offsetof(ngx_http_core_loc_conf_t, tcp_nodelay),
0451       NULL },
0452 
0453     { ngx_string("send_timeout"),
0454       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0455       ngx_conf_set_msec_slot,
0456       NGX_HTTP_LOC_CONF_OFFSET,
0457       offsetof(ngx_http_core_loc_conf_t, send_timeout),
0458       NULL },
0459 
0460     { ngx_string("send_lowat"),
0461       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0462       ngx_conf_set_size_slot,
0463       NGX_HTTP_LOC_CONF_OFFSET,
0464       offsetof(ngx_http_core_loc_conf_t, send_lowat),
0465       &ngx_http_core_lowat_post },
0466 
0467     { ngx_string("postpone_output"),
0468       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0469       ngx_conf_set_size_slot,
0470       NGX_HTTP_LOC_CONF_OFFSET,
0471       offsetof(ngx_http_core_loc_conf_t, postpone_output),
0472       NULL },
0473 
0474     { ngx_string("limit_rate"),
0475       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
0476                         |NGX_CONF_TAKE1,
0477       ngx_conf_set_size_slot,
0478       NGX_HTTP_LOC_CONF_OFFSET,
0479       offsetof(ngx_http_core_loc_conf_t, limit_rate),
0480       NULL },
0481 
0482     { ngx_string("limit_rate_after"),
0483       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
0484                         |NGX_CONF_TAKE1,
0485       ngx_conf_set_size_slot,
0486       NGX_HTTP_LOC_CONF_OFFSET,
0487       offsetof(ngx_http_core_loc_conf_t, limit_rate_after),
0488       NULL },
0489 
0490     { ngx_string("keepalive_timeout"),
0491       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
0492       ngx_http_core_keepalive,
0493       NGX_HTTP_LOC_CONF_OFFSET,
0494       0,
0495       NULL },
0496 
0497     { ngx_string("keepalive_requests"),
0498       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0499       ngx_conf_set_num_slot,
0500       NGX_HTTP_LOC_CONF_OFFSET,
0501       offsetof(ngx_http_core_loc_conf_t, keepalive_requests),
0502       NULL },
0503 
0504     { ngx_string("keepalive_disable"),
0505       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
0506       ngx_conf_set_bitmask_slot,
0507       NGX_HTTP_LOC_CONF_OFFSET,
0508       offsetof(ngx_http_core_loc_conf_t, keepalive_disable),
0509       &ngx_http_core_keepalive_disable },
0510 
0511     { ngx_string("satisfy"),
0512       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0513       ngx_conf_set_enum_slot,
0514       NGX_HTTP_LOC_CONF_OFFSET,
0515       offsetof(ngx_http_core_loc_conf_t, satisfy),
0516       &ngx_http_core_satisfy },
0517 
0518     { ngx_string("internal"),
0519       NGX_HTTP_LOC_CONF|NGX_CONF_NOARGS,
0520       ngx_http_core_internal,
0521       NGX_HTTP_LOC_CONF_OFFSET,
0522       0,
0523       NULL },
0524 
0525     { ngx_string("lingering_close"),
0526       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0527       ngx_conf_set_enum_slot,
0528       NGX_HTTP_LOC_CONF_OFFSET,
0529       offsetof(ngx_http_core_loc_conf_t, lingering_close),
0530       &ngx_http_core_lingering_close },
0531 
0532     { ngx_string("lingering_time"),
0533       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0534       ngx_conf_set_msec_slot,
0535       NGX_HTTP_LOC_CONF_OFFSET,
0536       offsetof(ngx_http_core_loc_conf_t, lingering_time),
0537       NULL },
0538 
0539     { ngx_string("lingering_timeout"),
0540       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0541       ngx_conf_set_msec_slot,
0542       NGX_HTTP_LOC_CONF_OFFSET,
0543       offsetof(ngx_http_core_loc_conf_t, lingering_timeout),
0544       NULL },
0545 
0546     { ngx_string("reset_timedout_connection"),
0547       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0548       ngx_conf_set_flag_slot,
0549       NGX_HTTP_LOC_CONF_OFFSET,
0550       offsetof(ngx_http_core_loc_conf_t, reset_timedout_connection),
0551       NULL },
0552 
0553     { ngx_string("absolute_redirect"),
0554       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0555       ngx_conf_set_flag_slot,
0556       NGX_HTTP_LOC_CONF_OFFSET,
0557       offsetof(ngx_http_core_loc_conf_t, absolute_redirect),
0558       NULL },
0559 
0560     { ngx_string("server_name_in_redirect"),
0561       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0562       ngx_conf_set_flag_slot,
0563       NGX_HTTP_LOC_CONF_OFFSET,
0564       offsetof(ngx_http_core_loc_conf_t, server_name_in_redirect),
0565       NULL },
0566 
0567     { ngx_string("port_in_redirect"),
0568       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0569       ngx_conf_set_flag_slot,
0570       NGX_HTTP_LOC_CONF_OFFSET,
0571       offsetof(ngx_http_core_loc_conf_t, port_in_redirect),
0572       NULL },
0573 
0574     { ngx_string("msie_padding"),
0575       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0576       ngx_conf_set_flag_slot,
0577       NGX_HTTP_LOC_CONF_OFFSET,
0578       offsetof(ngx_http_core_loc_conf_t, msie_padding),
0579       NULL },
0580 
0581     { ngx_string("msie_refresh"),
0582       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0583       ngx_conf_set_flag_slot,
0584       NGX_HTTP_LOC_CONF_OFFSET,
0585       offsetof(ngx_http_core_loc_conf_t, msie_refresh),
0586       NULL },
0587 
0588     { ngx_string("log_not_found"),
0589       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0590       ngx_conf_set_flag_slot,
0591       NGX_HTTP_LOC_CONF_OFFSET,
0592       offsetof(ngx_http_core_loc_conf_t, log_not_found),
0593       NULL },
0594 
0595     { ngx_string("log_subrequest"),
0596       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0597       ngx_conf_set_flag_slot,
0598       NGX_HTTP_LOC_CONF_OFFSET,
0599       offsetof(ngx_http_core_loc_conf_t, log_subrequest),
0600       NULL },
0601 
0602     { ngx_string("recursive_error_pages"),
0603       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0604       ngx_conf_set_flag_slot,
0605       NGX_HTTP_LOC_CONF_OFFSET,
0606       offsetof(ngx_http_core_loc_conf_t, recursive_error_pages),
0607       NULL },
0608 
0609     { ngx_string("server_tokens"),
0610       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0611       ngx_conf_set_enum_slot,
0612       NGX_HTTP_LOC_CONF_OFFSET,
0613       offsetof(ngx_http_core_loc_conf_t, server_tokens),
0614       &ngx_http_core_server_tokens },
0615 
0616     { ngx_string("if_modified_since"),
0617       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0618       ngx_conf_set_enum_slot,
0619       NGX_HTTP_LOC_CONF_OFFSET,
0620       offsetof(ngx_http_core_loc_conf_t, if_modified_since),
0621       &ngx_http_core_if_modified_since },
0622 
0623     { ngx_string("max_ranges"),
0624       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0625       ngx_conf_set_num_slot,
0626       NGX_HTTP_LOC_CONF_OFFSET,
0627       offsetof(ngx_http_core_loc_conf_t, max_ranges),
0628       NULL },
0629 
0630     { ngx_string("chunked_transfer_encoding"),
0631       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0632       ngx_conf_set_flag_slot,
0633       NGX_HTTP_LOC_CONF_OFFSET,
0634       offsetof(ngx_http_core_loc_conf_t, chunked_transfer_encoding),
0635       NULL },
0636 
0637     { ngx_string("etag"),
0638       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0639       ngx_conf_set_flag_slot,
0640       NGX_HTTP_LOC_CONF_OFFSET,
0641       offsetof(ngx_http_core_loc_conf_t, etag),
0642       NULL },
0643 
0644     { ngx_string("error_page"),
0645       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
0646                         |NGX_CONF_2MORE,
0647       ngx_http_core_error_page,
0648       NGX_HTTP_LOC_CONF_OFFSET,
0649       0,
0650       NULL },
0651 
0652     { ngx_string("try_files"),
0653       NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_2MORE,
0654       ngx_http_core_try_files,
0655       NGX_HTTP_LOC_CONF_OFFSET,
0656       0,
0657       NULL },
0658 
0659     { ngx_string("post_action"),
0660       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
0661                         |NGX_CONF_TAKE1,
0662       ngx_conf_set_str_slot,
0663       NGX_HTTP_LOC_CONF_OFFSET,
0664       offsetof(ngx_http_core_loc_conf_t, post_action),
0665       NULL },
0666 
0667     { ngx_string("error_log"),
0668       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
0669       ngx_http_core_error_log,
0670       NGX_HTTP_LOC_CONF_OFFSET,
0671       0,
0672       NULL },
0673 
0674     { ngx_string("open_file_cache"),
0675       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
0676       ngx_http_core_open_file_cache,
0677       NGX_HTTP_LOC_CONF_OFFSET,
0678       offsetof(ngx_http_core_loc_conf_t, open_file_cache),
0679       NULL },
0680 
0681     { ngx_string("open_file_cache_valid"),
0682       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0683       ngx_conf_set_sec_slot,
0684       NGX_HTTP_LOC_CONF_OFFSET,
0685       offsetof(ngx_http_core_loc_conf_t, open_file_cache_valid),
0686       NULL },
0687 
0688     { ngx_string("open_file_cache_min_uses"),
0689       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0690       ngx_conf_set_num_slot,
0691       NGX_HTTP_LOC_CONF_OFFSET,
0692       offsetof(ngx_http_core_loc_conf_t, open_file_cache_min_uses),
0693       NULL },
0694 
0695     { ngx_string("open_file_cache_errors"),
0696       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0697       ngx_conf_set_flag_slot,
0698       NGX_HTTP_LOC_CONF_OFFSET,
0699       offsetof(ngx_http_core_loc_conf_t, open_file_cache_errors),
0700       NULL },
0701 
0702     { ngx_string("open_file_cache_events"),
0703       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0704       ngx_conf_set_flag_slot,
0705       NGX_HTTP_LOC_CONF_OFFSET,
0706       offsetof(ngx_http_core_loc_conf_t, open_file_cache_events),
0707       NULL },
0708 
0709     { ngx_string("resolver"),
0710       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
0711       ngx_http_core_resolver,
0712       NGX_HTTP_LOC_CONF_OFFSET,
0713       0,
0714       NULL },
0715 
0716     { ngx_string("resolver_timeout"),
0717       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0718       ngx_conf_set_msec_slot,
0719       NGX_HTTP_LOC_CONF_OFFSET,
0720       offsetof(ngx_http_core_loc_conf_t, resolver_timeout),
0721       NULL },
0722 
0723 #if (NGX_HTTP_GZIP)
0724 
0725     { ngx_string("gzip_vary"),
0726       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
0727       ngx_conf_set_flag_slot,
0728       NGX_HTTP_LOC_CONF_OFFSET,
0729       offsetof(ngx_http_core_loc_conf_t, gzip_vary),
0730       NULL },
0731 
0732     { ngx_string("gzip_http_version"),
0733       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
0734       ngx_conf_set_enum_slot,
0735       NGX_HTTP_LOC_CONF_OFFSET,
0736       offsetof(ngx_http_core_loc_conf_t, gzip_http_version),
0737       &ngx_http_gzip_http_version },
0738 
0739     { ngx_string("gzip_proxied"),
0740       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
0741       ngx_conf_set_bitmask_slot,
0742       NGX_HTTP_LOC_CONF_OFFSET,
0743       offsetof(ngx_http_core_loc_conf_t, gzip_proxied),
0744       &ngx_http_gzip_proxied_mask },
0745 
0746     { ngx_string("gzip_disable"),
0747       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
0748       ngx_http_gzip_disable,
0749       NGX_HTTP_LOC_CONF_OFFSET,
0750       0,
0751       NULL },
0752 
0753 #endif
0754 
0755 #if (NGX_HAVE_OPENAT)
0756 
0757     { ngx_string("disable_symlinks"),
0758       NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE12,
0759       ngx_http_disable_symlinks,
0760       NGX_HTTP_LOC_CONF_OFFSET,
0761       0,
0762       NULL },
0763 
0764 #endif
0765 
0766       ngx_null_command
0767 };
0768 
0769 
0770 static ngx_http_module_t  ngx_http_core_module_ctx = {
0771     ngx_http_core_preconfiguration,        /* preconfiguration */
0772     ngx_http_core_postconfiguration,       /* postconfiguration */
0773 
0774     ngx_http_core_create_main_conf,        /* create main configuration */
0775     ngx_http_core_init_main_conf,          /* init main configuration */
0776 
0777     ngx_http_core_create_srv_conf,         /* create server configuration */
0778     ngx_http_core_merge_srv_conf,          /* merge server configuration */
0779 
0780     ngx_http_core_create_loc_conf,         /* create location configuration */
0781     ngx_http_core_merge_loc_conf           /* merge location configuration */
0782 };
0783 
0784 
0785 ngx_module_t  ngx_http_core_module = {
0786     NGX_MODULE_V1,
0787     &ngx_http_core_module_ctx,             /* module context */
0788     ngx_http_core_commands,                /* module directives */
0789     NGX_HTTP_MODULE,                       /* module type */
0790     NULL,                                  /* init master */
0791     NULL,                                  /* init module */
0792     NULL,                                  /* init process */
0793     NULL,                                  /* init thread */
0794     NULL,                                  /* exit thread */
0795     NULL,                                  /* exit process */
0796     NULL,                                  /* exit master */
0797     NGX_MODULE_V1_PADDING
0798 };
0799 
0800 
0801 ngx_str_t  ngx_http_core_get_method = { 3, (u_char *) "GET" };
0802 
0803 
0804 void
0805 ngx_http_handler(ngx_http_request_t *r)
0806 {
0807     ngx_http_core_main_conf_t  *cmcf;
0808 
0809     r->connection->log->action = NULL;
0810 
0811     if (!r->internal) {
0812         switch (r->headers_in.connection_type) {
0813         case 0:
0814             r->keepalive = (r->http_version > NGX_HTTP_VERSION_10);
0815             break;
0816 
0817         case NGX_HTTP_CONNECTION_CLOSE:
0818             r->keepalive = 0;
0819             break;
0820 
0821         case NGX_HTTP_CONNECTION_KEEP_ALIVE:
0822             r->keepalive = 1;
0823             break;
0824         }
0825 
0826         r->lingering_close = (r->headers_in.content_length_n > 0
0827                               || r->headers_in.chunked);
0828         r->phase_handler = 0;
0829 
0830     } else {
0831         cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
0832         r->phase_handler = cmcf->phase_engine.server_rewrite_index;
0833     }
0834 
0835     r->valid_location = 1;
0836 #if (NGX_HTTP_GZIP)
0837     r->gzip_tested = 0;
0838     r->gzip_ok = 0;
0839     r->gzip_vary = 0;
0840 #endif
0841 
0842     r->write_event_handler = ngx_http_core_run_phases;
0843     ngx_http_core_run_phases(r);
0844 }
0845 
0846 
0847 void
0848 ngx_http_core_run_phases(ngx_http_request_t *r)
0849 {
0850     ngx_int_t                   rc;
0851     ngx_http_phase_handler_t   *ph;
0852     ngx_http_core_main_conf_t  *cmcf;
0853 
0854     cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
0855 
0856     ph = cmcf->phase_engine.handlers;
0857 
0858     while (ph[r->phase_handler].checker) {
0859 
0860         rc = ph[r->phase_handler].checker(r, &ph[r->phase_handler]);
0861 
0862         if (rc == NGX_OK) {
0863             return;
0864         }
0865     }
0866 }
0867 
0868 
0869 ngx_int_t
0870 ngx_http_core_generic_phase(ngx_http_request_t *r, ngx_http_phase_handler_t *ph)
0871 {
0872     ngx_int_t  rc;
0873 
0874     /*
0875      * generic phase checker,
0876      * used by the post read and pre-access phases
0877      */
0878 
0879     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
0880                    "generic phase: %ui", r->phase_handler);
0881 
0882     rc = ph->handler(r);
0883 
0884     if (rc == NGX_OK) {
0885         r->phase_handler = ph->next;
0886         return NGX_AGAIN;
0887     }
0888 
0889     if (rc == NGX_DECLINED) {
0890         r->phase_handler++;
0891         return NGX_AGAIN;
0892     }
0893 
0894     if (rc == NGX_AGAIN || rc == NGX_DONE) {
0895         return NGX_OK;
0896     }
0897 
0898     /* rc == NGX_ERROR || rc == NGX_HTTP_...  */
0899 
0900     ngx_http_finalize_request(r, rc);
0901 
0902     return NGX_OK;
0903 }
0904 
0905 
0906 ngx_int_t
0907 ngx_http_core_rewrite_phase(ngx_http_request_t *r, ngx_http_phase_handler_t *ph)
0908 {
0909     ngx_int_t  rc;
0910 
0911     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
0912                    "rewrite phase: %ui", r->phase_handler);
0913 
0914     rc = ph->handler(r);
0915 
0916     if (rc == NGX_DECLINED) {
0917         r->phase_handler++;
0918         return NGX_AGAIN;
0919     }
0920 
0921     if (rc == NGX_DONE) {
0922         return NGX_OK;
0923     }
0924 
0925     /* NGX_OK, NGX_AGAIN, NGX_ERROR, NGX_HTTP_...  */
0926 
0927     ngx_http_finalize_request(r, rc);
0928 
0929     return NGX_OK;
0930 }
0931 
0932 
0933 ngx_int_t
0934 ngx_http_core_find_config_phase(ngx_http_request_t *r,
0935     ngx_http_phase_handler_t *ph)
0936 {
0937     u_char                    *p;
0938     size_t                     len;
0939     ngx_int_t                  rc;
0940     ngx_http_core_loc_conf_t  *clcf;
0941 
0942     r->content_handler = NULL;
0943     r->uri_changed = 0;
0944 
0945     rc = ngx_http_core_find_location(r);
0946 
0947     if (rc == NGX_ERROR) {
0948         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
0949         return NGX_OK;
0950     }
0951 
0952     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
0953 
0954     if (!r->internal && clcf->internal) {
0955         ngx_http_finalize_request(r, NGX_HTTP_NOT_FOUND);
0956         return NGX_OK;
0957     }
0958 
0959     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
0960                    "using configuration \"%s%V\"",
0961                    (clcf->noname ? "*" : (clcf->exact_match ? "=" : "")),
0962                    &clcf->name);
0963 
0964     ngx_http_update_location_config(r);
0965 
0966     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
0967                    "http cl:%O max:%O",
0968                    r->headers_in.content_length_n, clcf->client_max_body_size);
0969 
0970     if (r->headers_in.content_length_n != -1
0971         && !r->discard_body
0972         && clcf->client_max_body_size
0973         && clcf->client_max_body_size < r->headers_in.content_length_n)
0974     {
0975         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
0976                       "client intended to send too large body: %O bytes",
0977                       r->headers_in.content_length_n);
0978 
0979         r->expect_tested = 1;
0980         (void) ngx_http_discard_request_body(r);
0981         ngx_http_finalize_request(r, NGX_HTTP_REQUEST_ENTITY_TOO_LARGE);
0982         return NGX_OK;
0983     }
0984 
0985     if (rc == NGX_DONE) {
0986         ngx_http_clear_location(r);
0987 
0988         r->headers_out.location = ngx_list_push(&r->headers_out.headers);
0989         if (r->headers_out.location == NULL) {
0990             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
0991             return NGX_OK;
0992         }
0993 
0994         r->headers_out.location->hash = 1;
0995         ngx_str_set(&r->headers_out.location->key, "Location");
0996 
0997         if (r->args.len == 0) {
0998             r->headers_out.location->value = clcf->name;
0999 
1000         } else {
1001             len = clcf->name.len + 1 + r->args.len;
1002             p = ngx_pnalloc(r->pool, len);
1003 
1004             if (p == NULL) {
1005                 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
1006                 return NGX_OK;
1007             }
1008 
1009             r->headers_out.location->value.len = len;
1010             r->headers_out.location->value.data = p;
1011 
1012             p = ngx_cpymem(p, clcf->name.data, clcf->name.len);
1013             *p++ = '?';
1014             ngx_memcpy(p, r->args.data, r->args.len);
1015         }
1016 
1017         ngx_http_finalize_request(r, NGX_HTTP_MOVED_PERMANENTLY);
1018         return NGX_OK;
1019     }
1020 
1021     r->phase_handler++;
1022     return NGX_AGAIN;
1023 }
1024 
1025 
1026 ngx_int_t
1027 ngx_http_core_post_rewrite_phase(ngx_http_request_t *r,
1028     ngx_http_phase_handler_t *ph)
1029 {
1030     ngx_http_core_srv_conf_t  *cscf;
1031 
1032     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1033                    "post rewrite phase: %ui", r->phase_handler);
1034 
1035     if (!r->uri_changed) {
1036         r->phase_handler++;
1037         return NGX_AGAIN;
1038     }
1039 
1040     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1041                    "uri changes: %d", r->uri_changes);
1042 
1043     /*
1044      * gcc before 3.3 compiles the broken code for
1045      *     if (r->uri_changes-- == 0)
1046      * if the r->uri_changes is defined as
1047      *     unsigned  uri_changes:4
1048      */
1049 
1050     r->uri_changes--;
1051 
1052     if (r->uri_changes == 0) {
1053         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1054                       "rewrite or internal redirection cycle "
1055                       "while processing \"%V\"", &r->uri);
1056 
1057         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
1058         return NGX_OK;
1059     }
1060 
1061     r->phase_handler = ph->next;
1062 
1063     cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
1064     r->loc_conf = cscf->ctx->loc_conf;
1065 
1066     return NGX_AGAIN;
1067 }
1068 
1069 
1070 ngx_int_t
1071 ngx_http_core_access_phase(ngx_http_request_t *r, ngx_http_phase_handler_t *ph)
1072 {
1073     ngx_int_t                  rc;
1074     ngx_http_core_loc_conf_t  *clcf;
1075 
1076     if (r != r->main) {
1077         r->phase_handler = ph->next;
1078         return NGX_AGAIN;
1079     }
1080 
1081     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1082                    "access phase: %ui", r->phase_handler);
1083 
1084     rc = ph->handler(r);
1085 
1086     if (rc == NGX_DECLINED) {
1087         r->phase_handler++;
1088         return NGX_AGAIN;
1089     }
1090 
1091     if (rc == NGX_AGAIN || rc == NGX_DONE) {
1092         return NGX_OK;
1093     }
1094 
1095     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1096 
1097     if (clcf->satisfy == NGX_HTTP_SATISFY_ALL) {
1098 
1099         if (rc == NGX_OK) {
1100             r->phase_handler++;
1101             return NGX_AGAIN;
1102         }
1103 
1104     } else {
1105         if (rc == NGX_OK) {
1106             r->access_code = 0;
1107 
1108             if (r->headers_out.www_authenticate) {
1109                 r->headers_out.www_authenticate->hash = 0;
1110             }
1111 
1112             r->phase_handler = ph->next;
1113             return NGX_AGAIN;
1114         }
1115 
1116         if (rc == NGX_HTTP_FORBIDDEN || rc == NGX_HTTP_UNAUTHORIZED) {
1117             if (r->access_code != NGX_HTTP_UNAUTHORIZED) {
1118                 r->access_code = rc;
1119             }
1120 
1121             r->phase_handler++;
1122             return NGX_AGAIN;
1123         }
1124     }
1125 
1126     /* rc == NGX_ERROR || rc == NGX_HTTP_...  */
1127 
1128     ngx_http_finalize_request(r, rc);
1129     return NGX_OK;
1130 }
1131 
1132 
1133 ngx_int_t
1134 ngx_http_core_post_access_phase(ngx_http_request_t *r,
1135     ngx_http_phase_handler_t *ph)
1136 {
1137     ngx_int_t  access_code;
1138 
1139     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1140                    "post access phase: %ui", r->phase_handler);
1141 
1142     access_code = r->access_code;
1143 
1144     if (access_code) {
1145         if (access_code == NGX_HTTP_FORBIDDEN) {
1146             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1147                           "access forbidden by rule");
1148         }
1149 
1150         r->access_code = 0;
1151         ngx_http_finalize_request(r, access_code);
1152         return NGX_OK;
1153     }
1154 
1155     r->phase_handler++;
1156     return NGX_AGAIN;
1157 }
1158 
1159 
1160 ngx_int_t
1161 ngx_http_core_try_files_phase(ngx_http_request_t *r,
1162     ngx_http_phase_handler_t *ph)
1163 {
1164     size_t                        len, root, alias, reserve, allocated;
1165     u_char                       *p, *name;
1166     ngx_str_t                     path, args;
1167     ngx_uint_t                    test_dir;
1168     ngx_http_try_file_t          *tf;
1169     ngx_open_file_info_t          of;
1170     ngx_http_script_code_pt       code;
1171     ngx_http_script_engine_t      e;
1172     ngx_http_core_loc_conf_t     *clcf;
1173     ngx_http_script_len_code_pt   lcode;
1174 
1175     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1176                    "try files phase: %ui", r->phase_handler);
1177 
1178     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1179 
1180     if (clcf->try_files == NULL) {
1181         r->phase_handler++;
1182         return NGX_AGAIN;
1183     }
1184 
1185     allocated = 0;
1186     root = 0;
1187     name = NULL;
1188     /* suppress MSVC warning */
1189     path.data = NULL;
1190 
1191     tf = clcf->try_files;
1192 
1193     alias = clcf->alias;
1194 
1195     for ( ;; ) {
1196 
1197         if (tf->lengths) {
1198             ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
1199 
1200             e.ip = tf->lengths->elts;
1201             e.request = r;
1202 
1203             /* 1 is for terminating '\0' as in static names */
1204             len = 1;
1205 
1206             while (*(uintptr_t *) e.ip) {
1207                 lcode = *(ngx_http_script_len_code_pt *) e.ip;
1208                 len += lcode(&e);
1209             }
1210 
1211         } else {
1212             len = tf->name.len;
1213         }
1214 
1215         if (!alias) {
1216             reserve = len > r->uri.len ? len - r->uri.len : 0;
1217 
1218         } else if (alias == NGX_MAX_SIZE_T_VALUE) {
1219             reserve = len;
1220 
1221         } else {
1222             reserve = len > r->uri.len - alias ? len - (r->uri.len - alias) : 0;
1223         }
1224 
1225         if (reserve > allocated || !allocated) {
1226 
1227             /* 16 bytes are preallocation */
1228             allocated = reserve + 16;
1229 
1230             if (ngx_http_map_uri_to_path(r, &path, &root, allocated) == NULL) {
1231                 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
1232                 return NGX_OK;
1233             }
1234 
1235             name = path.data + root;
1236         }
1237 
1238         if (tf->values == NULL) {
1239 
1240             /* tf->name.len includes the terminating '\0' */
1241 
1242             ngx_memcpy(name, tf->name.data, tf->name.len);
1243 
1244             path.len = (name + tf->name.len - 1) - path.data;
1245 
1246         } else {
1247             e.ip = tf->values->elts;
1248             e.pos = name;
1249             e.flushed = 1;
1250 
1251             while (*(uintptr_t *) e.ip) {
1252                 code = *(ngx_http_script_code_pt *) e.ip;
1253                 code((ngx_http_script_engine_t *) &e);
1254             }
1255 
1256             path.len = e.pos - path.data;
1257 
1258             *e.pos = '\0';
1259 
1260             if (alias && alias != NGX_MAX_SIZE_T_VALUE
1261                 && ngx_strncmp(name, r->uri.data, alias) == 0)
1262             {
1263                 ngx_memmove(name, name + alias, len - alias);
1264                 path.len -= alias;
1265             }
1266         }
1267 
1268         test_dir = tf->test_dir;
1269 
1270         tf++;
1271 
1272         ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1273                        "trying to use %s: \"%s\" \"%s\"",
1274                        test_dir ? "dir" : "file", name, path.data);
1275 
1276         if (tf->lengths == NULL && tf->name.len == 0) {
1277 
1278             if (tf->code) {
1279                 ngx_http_finalize_request(r, tf->code);
1280                 return NGX_OK;
1281             }
1282 
1283             path.len -= root;
1284             path.data += root;
1285 
1286             if (path.data[0] == '@') {
1287                 (void) ngx_http_named_location(r, &path);
1288 
1289             } else {
1290                 ngx_http_split_args(r, &path, &args);
1291 
1292                 (void) ngx_http_internal_redirect(r, &path, &args);
1293             }
1294 
1295             ngx_http_finalize_request(r, NGX_DONE);
1296             return NGX_OK;
1297         }
1298 
1299         ngx_memzero(&of, sizeof(ngx_open_file_info_t));
1300 
1301         of.read_ahead = clcf->read_ahead;
1302         of.directio = clcf->directio;
1303         of.valid = clcf->open_file_cache_valid;
1304         of.min_uses = clcf->open_file_cache_min_uses;
1305         of.test_only = 1;
1306         of.errors = clcf->open_file_cache_errors;
1307         of.events = clcf->open_file_cache_events;
1308 
1309         if (ngx_http_set_disable_symlinks(r, clcf, &path, &of) != NGX_OK) {
1310             ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
1311             return NGX_OK;
1312         }
1313 
1314         if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool)
1315             != NGX_OK)
1316         {
1317             if (of.err == 0) {
1318                 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
1319                 return NGX_OK;
1320             }
1321 
1322             if (of.err != NGX_ENOENT
1323                 && of.err != NGX_ENOTDIR
1324                 && of.err != NGX_ENAMETOOLONG)
1325             {
1326                 ngx_log_error(NGX_LOG_CRIT, r->connection->log, of.err,
1327                               "%s \"%s\" failed", of.failed, path.data);
1328             }
1329 
1330             continue;
1331         }
1332 
1333         if (of.is_dir != test_dir) {
1334             continue;
1335         }
1336 
1337         path.len -= root;
1338         path.data += root;
1339 
1340         if (!alias) {
1341             r->uri = path;
1342 
1343         } else if (alias == NGX_MAX_SIZE_T_VALUE) {
1344             if (!test_dir) {
1345                 r->uri = path;
1346                 r->add_uri_to_alias = 1;
1347             }
1348 
1349         } else {
1350             name = r->uri.data;
1351 
1352             r->uri.len = alias + path.len;
1353             r->uri.data = ngx_pnalloc(r->pool, r->uri.len);
1354             if (r->uri.data == NULL) {
1355                 ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
1356                 return NGX_OK;
1357             }
1358 
1359             p = ngx_copy(r->uri.data, name, alias);
1360             ngx_memcpy(p, path.data, path.len);
1361         }
1362 
1363         ngx_http_set_exten(r);
1364 
1365         ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1366                        "try file uri: \"%V\"", &r->uri);
1367 
1368         r->phase_handler++;
1369         return NGX_AGAIN;
1370     }
1371 
1372     /* not reached */
1373 }
1374 
1375 
1376 ngx_int_t
1377 ngx_http_core_content_phase(ngx_http_request_t *r,
1378     ngx_http_phase_handler_t *ph)
1379 {
1380     size_t     root;
1381     ngx_int_t  rc;
1382     ngx_str_t  path;
1383 
1384     if (r->content_handler) {
1385         r->write_event_handler = ngx_http_request_empty_handler;
1386         ngx_http_finalize_request(r, r->content_handler(r));
1387         return NGX_OK;
1388     }
1389 
1390     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1391                    "content phase: %ui", r->phase_handler);
1392 
1393     rc = ph->handler(r);
1394 
1395     if (rc != NGX_DECLINED) {
1396         ngx_http_finalize_request(r, rc);
1397         return NGX_OK;
1398     }
1399 
1400     /* rc == NGX_DECLINED */
1401 
1402     ph++;
1403 
1404     if (ph->checker) {
1405         r->phase_handler++;
1406         return NGX_AGAIN;
1407     }
1408 
1409     /* no content handler was found */
1410 
1411     if (r->uri.data[r->uri.len - 1] == '/') {
1412 
1413         if (ngx_http_map_uri_to_path(r, &path, &root, 0) != NULL) {
1414             ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1415                           "directory index of \"%s\" is forbidden", path.data);
1416         }
1417 
1418         ngx_http_finalize_request(r, NGX_HTTP_FORBIDDEN);
1419         return NGX_OK;
1420     }
1421 
1422     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "no handler found");
1423 
1424     ngx_http_finalize_request(r, NGX_HTTP_NOT_FOUND);
1425     return NGX_OK;
1426 }
1427 
1428 
1429 void
1430 ngx_http_update_location_config(ngx_http_request_t *r)
1431 {
1432     ngx_http_core_loc_conf_t  *clcf;
1433 
1434     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1435 
1436     if (r->method & clcf->limit_except) {
1437         r->loc_conf = clcf->limit_except_loc_conf;
1438         clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1439     }
1440 
1441     if (r == r->main) {
1442         ngx_set_connection_log(r->connection, clcf->error_log);
1443     }
1444 
1445     if ((ngx_io.flags & NGX_IO_SENDFILE) && clcf->sendfile) {
1446         r->connection->sendfile = 1;
1447 
1448     } else {
1449         r->connection->sendfile = 0;
1450     }
1451 
1452     if (clcf->client_body_in_file_only) {
1453         r->request_body_in_file_only = 1;
1454         r->request_body_in_persistent_file = 1;
1455         r->request_body_in_clean_file =
1456             clcf->client_body_in_file_only == NGX_HTTP_REQUEST_BODY_FILE_CLEAN;
1457         r->request_body_file_log_level = NGX_LOG_NOTICE;
1458 
1459     } else {
1460         r->request_body_file_log_level = NGX_LOG_WARN;
1461     }
1462 
1463     r->request_body_in_single_buf = clcf->client_body_in_single_buffer;
1464 
1465     if (r->keepalive) {
1466         if (clcf->keepalive_timeout == 0) {
1467             r->keepalive = 0;
1468 
1469         } else if (r->connection->requests >= clcf->keepalive_requests) {
1470             r->keepalive = 0;
1471 
1472         } else if (r->headers_in.msie6
1473                    && r->method == NGX_HTTP_POST
1474                    && (clcf->keepalive_disable
1475                        & NGX_HTTP_KEEPALIVE_DISABLE_MSIE6))
1476         {
1477             /*
1478              * MSIE may wait for some time if an response for
1479              * a POST request was sent over a keepalive connection
1480              */
1481             r->keepalive = 0;
1482 
1483         } else if (r->headers_in.safari
1484                    && (clcf->keepalive_disable
1485                        & NGX_HTTP_KEEPALIVE_DISABLE_SAFARI))
1486         {
1487             /*
1488              * Safari may send a POST request to a closed keepalive
1489              * connection and may stall for some time, see
1490              *     https://bugs.webkit.org/show_bug.cgi?id=5760
1491              */
1492             r->keepalive = 0;
1493         }
1494     }
1495 
1496     if (!clcf->tcp_nopush) {
1497         /* disable TCP_NOPUSH/TCP_CORK use */
1498         r->connection->tcp_nopush = NGX_TCP_NOPUSH_DISABLED;
1499     }
1500 
1501     if (r->limit_rate == 0) {
1502         r->limit_rate = clcf->limit_rate;
1503     }
1504 
1505     if (clcf->handler) {
1506         r->content_handler = clcf->handler;
1507     }
1508 }
1509 
1510 
1511 /*
1512  * NGX_OK       - exact or regex match
1513  * NGX_DONE     - auto redirect
1514  * NGX_AGAIN    - inclusive match
1515  * NGX_ERROR    - regex error
1516  * NGX_DECLINED - no match
1517  */
1518 
1519 static ngx_int_t
1520 ngx_http_core_find_location(ngx_http_request_t *r)
1521 {
1522     ngx_int_t                  rc;
1523     ngx_http_core_loc_conf_t  *pclcf;
1524 #if (NGX_PCRE)
1525     ngx_int_t                  n;
1526     ngx_uint_t                 noregex;
1527     ngx_http_core_loc_conf_t  *clcf, **clcfp;
1528 
1529     noregex = 0;
1530 #endif
1531 
1532     pclcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1533 
1534     rc = ngx_http_core_find_static_location(r, pclcf->static_locations);
1535 
1536     if (rc == NGX_AGAIN) {
1537 
1538 #if (NGX_PCRE)
1539         clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1540 
1541         noregex = clcf->noregex;
1542 #endif
1543 
1544         /* look up nested locations */
1545 
1546         rc = ngx_http_core_find_location(r);
1547     }
1548 
1549     if (rc == NGX_OK || rc == NGX_DONE) {
1550         return rc;
1551     }
1552 
1553     /* rc == NGX_DECLINED or rc == NGX_AGAIN in nested location */
1554 
1555 #if (NGX_PCRE)
1556 
1557     if (noregex == 0 && pclcf->regex_locations) {
1558 
1559         for (clcfp = pclcf->regex_locations; *clcfp; clcfp++) {
1560 
1561             ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1562                            "test location: ~ \"%V\"", &(*clcfp)->name);
1563 
1564             n = ngx_http_regex_exec(r, (*clcfp)->regex, &r->uri);
1565 
1566             if (n == NGX_OK) {
1567                 r->loc_conf = (*clcfp)->loc_conf;
1568 
1569                 /* look up nested locations */
1570 
1571                 rc = ngx_http_core_find_location(r);
1572 
1573                 return (rc == NGX_ERROR) ? rc : NGX_OK;
1574             }
1575 
1576             if (n == NGX_DECLINED) {
1577                 continue;
1578             }
1579 
1580             return NGX_ERROR;
1581         }
1582     }
1583 #endif
1584 
1585     return rc;
1586 }
1587 
1588 
1589 /*
1590  * NGX_OK       - exact match
1591  * NGX_DONE     - auto redirect
1592  * NGX_AGAIN    - inclusive match
1593  * NGX_DECLINED - no match
1594  */
1595 
1596 static ngx_int_t
1597 ngx_http_core_find_static_location(ngx_http_request_t *r,
1598     ngx_http_location_tree_node_t *node)
1599 {
1600     u_char     *uri;
1601     size_t      len, n;
1602     ngx_int_t   rc, rv;
1603 
1604     len = r->uri.len;
1605     uri = r->uri.data;
1606 
1607     rv = NGX_DECLINED;
1608 
1609     for ( ;; ) {
1610 
1611         if (node == NULL) {
1612             return rv;
1613         }
1614 
1615         ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
1616                        "test location: \"%*s\"",
1617                        (size_t) node->len, node->name);
1618 
1619         n = (len <= (size_t) node->len) ? len : node->len;
1620 
1621         rc = ngx_filename_cmp(uri, node->name, n);
1622 
1623         if (rc != 0) {
1624             node = (rc < 0) ? node->left : node->right;
1625 
1626             continue;
1627         }
1628 
1629         if (len > (size_t) node->len) {
1630 
1631             if (node->inclusive) {
1632 
1633                 r->loc_conf = node->inclusive->loc_conf;
1634                 rv = NGX_AGAIN;
1635 
1636                 node = node->tree;
1637                 uri += n;
1638                 len -= n;
1639 
1640                 continue;
1641             }
1642 
1643             /* exact only */
1644 
1645             node = node->right;
1646 
1647             continue;
1648         }
1649 
1650         if (len == (size_t) node->len) {
1651 
1652             if (node->exact) {
1653                 r->loc_conf = node->exact->loc_conf;
1654                 return NGX_OK;
1655 
1656             } else {
1657                 r->loc_conf = node->inclusive->loc_conf;
1658                 return NGX_AGAIN;
1659             }
1660         }
1661 
1662         /* len < node->len */
1663 
1664         if (len + 1 == (size_t) node->len && node->auto_redirect) {
1665 
1666             r->loc_conf = (node->exact) ? node->exact->loc_conf:
1667                                           node->inclusive->loc_conf;
1668             rv = NGX_DONE;
1669         }
1670 
1671         node = node->left;
1672     }
1673 }
1674 
1675 
1676 void *
1677 ngx_http_test_content_type(ngx_http_request_t *r, ngx_hash_t *types_hash)
1678 {
1679     u_char      c, *lowcase;
1680     size_t      len;
1681     ngx_uint_t  i, hash;
1682 
1683     if (types_hash->size == 0) {
1684         return (void *) 4;
1685     }
1686 
1687     if (r->headers_out.content_type.len == 0) {
1688         return NULL;
1689     }
1690 
1691     len = r->headers_out.content_type_len;
1692 
1693     if (r->headers_out.content_type_lowcase == NULL) {
1694 
1695         lowcase = ngx_pnalloc(r->pool, len);
1696         if (lowcase == NULL) {
1697             return NULL;
1698         }
1699 
1700         r->headers_out.content_type_lowcase = lowcase;
1701 
1702         hash = 0;
1703 
1704         for (i = 0; i < len; i++) {
1705             c = ngx_tolower(r->headers_out.content_type.data[i]);
1706             hash = ngx_hash(hash, c);
1707             lowcase[i] = c;
1708         }
1709 
1710         r->headers_out.content_type_hash = hash;
1711     }
1712 
1713     return ngx_hash_find(types_hash, r->headers_out.content_type_hash,
1714                          r->headers_out.content_type_lowcase, len);
1715 }
1716 
1717 
1718 ngx_int_t
1719 ngx_http_set_content_type(ngx_http_request_t *r)
1720 {
1721     u_char                     c, *exten;
1722     ngx_str_t                 *type;
1723     ngx_uint_t                 i, hash;
1724     ngx_http_core_loc_conf_t  *clcf;
1725 
1726     if (r->headers_out.content_type.len) {
1727         return NGX_OK;
1728     }
1729 
1730     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1731 
1732     if (r->exten.len) {
1733 
1734         hash = 0;
1735 
1736         for (i = 0; i < r->exten.len; i++) {
1737             c = r->exten.data[i];
1738 
1739             if (c >= 'A' && c <= 'Z') {
1740 
1741                 exten = ngx_pnalloc(r->pool, r->exten.len);
1742                 if (exten == NULL) {
1743                     return NGX_ERROR;
1744                 }
1745 
1746                 hash = ngx_hash_strlow(exten, r->exten.data, r->exten.len);
1747 
1748                 r->exten.data = exten;
1749 
1750                 break;
1751             }
1752 
1753             hash = ngx_hash(hash, c);
1754         }
1755 
1756         type = ngx_hash_find(&clcf->types_hash, hash,
1757                              r->exten.data, r->exten.len);
1758 
1759         if (type) {
1760             r->headers_out.content_type_len = type->len;
1761             r->headers_out.content_type = *type;
1762 
1763             return NGX_OK;
1764         }
1765     }
1766 
1767     r->headers_out.content_type_len = clcf->default_type.len;
1768     r->headers_out.content_type = clcf->default_type;
1769 
1770     return NGX_OK;
1771 }
1772 
1773 
1774 void
1775 ngx_http_set_exten(ngx_http_request_t *r)
1776 {
1777     ngx_int_t  i;
1778 
1779     ngx_str_null(&r->exten);
1780 
1781     for (i = r->uri.len - 1; i > 1; i--) {
1782         if (r->uri.data[i] == '.' && r->uri.data[i - 1] != '/') {
1783 
1784             r->exten.len = r->uri.len - i - 1;
1785             r->exten.data = &r->uri.data[i + 1];
1786 
1787             return;
1788 
1789         } else if (r->uri.data[i] == '/') {
1790             return;
1791         }
1792     }
1793 
1794     return;
1795 }
1796 
1797 
1798 ngx_int_t
1799 ngx_http_set_etag(ngx_http_request_t *r)
1800 {
1801     ngx_table_elt_t           *etag;
1802     ngx_http_core_loc_conf_t  *clcf;
1803 
1804     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
1805 
1806     if (!clcf->etag) {
1807         return NGX_OK;
1808     }
1809 
1810     etag = ngx_list_push(&r->headers_out.headers);
1811     if (etag == NULL) {
1812         return NGX_ERROR;
1813     }
1814 
1815     etag->hash = 1;
1816     ngx_str_set(&etag->key, "ETag");
1817 
1818     etag->value.data = ngx_pnalloc(r->pool, NGX_OFF_T_LEN + NGX_TIME_T_LEN + 3);
1819     if (etag->value.data == NULL) {
1820         etag->hash = 0;
1821         return NGX_ERROR;
1822     }
1823 
1824     etag->value.len = ngx_sprintf(etag->value.data, "\"%xT-%xO\"",
1825                                   r->headers_out.last_modified_time,
1826                                   r->headers_out.content_length_n)
1827                       - etag->value.data;
1828 
1829     r->headers_out.etag = etag;
1830 
1831     return NGX_OK;
1832 }
1833 
1834 
1835 void
1836 ngx_http_weak_etag(ngx_http_request_t *r)
1837 {
1838     size_t            len;
1839     u_char           *p;
1840     ngx_table_elt_t  *etag;
1841 
1842     etag = r->headers_out.etag;
1843 
1844     if (etag == NULL) {
1845         return;
1846     }
1847 
1848     if (etag->value.len > 2
1849         && etag->value.data[0] == 'W'
1850         && etag->value.data[1] == '/')
1851     {
1852         return;
1853     }
1854 
1855     if (etag->value.len < 1 || etag->value.data[0] != '"') {
1856         r->headers_out.etag->hash = 0;
1857         r->headers_out.etag = NULL;
1858         return;
1859     }
1860 
1861     p = ngx_pnalloc(r->pool, etag->value.len + 2);
1862     if (p == NULL) {
1863         r->headers_out.etag->hash = 0;
1864         r->headers_out.etag = NULL;
1865         return;
1866     }
1867 
1868     len = ngx_sprintf(p, "W/%V", &etag->value) - p;
1869 
1870     etag->value.data = p;
1871     etag->value.len = len;
1872 }
1873 
1874 
1875 ngx_int_t
1876 ngx_http_send_response(ngx_http_request_t *r, ngx_uint_t status,
1877     ngx_str_t *ct, ngx_http_complex_value_t *cv)
1878 {
1879     ngx_int_t     rc;
1880     ngx_str_t     val;
1881     ngx_buf_t    *b;
1882     ngx_chain_t   out;
1883 
1884     if (ngx_http_discard_request_body(r) != NGX_OK) {
1885         return NGX_HTTP_INTERNAL_SERVER_ERROR;
1886     }
1887 
1888     r->headers_out.status = status;
1889 
1890     if (ngx_http_complex_value(r, cv, &val) != NGX_OK) {
1891         return NGX_HTTP_INTERNAL_SERVER_ERROR;
1892     }
1893 
1894     if (status == NGX_HTTP_MOVED_PERMANENTLY
1895         || status == NGX_HTTP_MOVED_TEMPORARILY
1896         || status == NGX_HTTP_SEE_OTHER
1897         || status == NGX_HTTP_TEMPORARY_REDIRECT)
1898     {
1899         ngx_http_clear_location(r);
1900 
1901         r->headers_out.location = ngx_list_push(&r->headers_out.headers);
1902         if (r->headers_out.location == NULL) {
1903             return NGX_HTTP_INTERNAL_SERVER_ERROR;
1904         }
1905 
1906         r->headers_out.location->hash = 1;
1907         ngx_str_set(&r->headers_out.location->key, "Location");
1908         r->headers_out.location->value = val;
1909 
1910         return status;
1911     }
1912 
1913     r->headers_out.content_length_n = val.len;
1914 
1915     if (ct) {
1916         r->headers_out.content_type_len = ct->len;
1917         r->headers_out.content_type = *ct;
1918 
1919     } else {
1920         if (ngx_http_set_content_type(r) != NGX_OK) {
1921             return NGX_HTTP_INTERNAL_SERVER_ERROR;
1922         }
1923     }
1924 
1925     if (r->method == NGX_HTTP_HEAD || (r != r->main && val.len == 0)) {
1926         return ngx_http_send_header(r);
1927     }
1928 
1929     b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
1930     if (b == NULL) {
1931         return NGX_HTTP_INTERNAL_SERVER_ERROR;
1932     }
1933 
1934     b->pos = val.data;
1935     b->last = val.data + val.len;
1936     b->memory = val.len ? 1 : 0;
1937     b->last_buf = (r == r->main) ? 1 : 0;
1938     b->last_in_chain = 1;
1939 
1940     out.buf = b;
1941     out.next = NULL;
1942 
1943     rc = ngx_http_send_header(r);
1944 
1945     if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
1946         return rc;
1947     }
1948 
1949     return ngx_http_output_filter(r, &out);
1950 }
1951 
1952 
1953 ngx_int_t
1954 ngx_http_send_header(ngx_http_request_t *r)
1955 {
1956     if (r->post_action) {
1957         return NGX_OK;
1958     }
1959 
1960     if (r->header_sent) {
1961         ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
1962                       "header already sent");
1963         return NGX_ERROR;
1964     }
1965 
1966     if (r->err_status) {
1967         r->headers_out.status = r->err_status;
1968         r->headers_out.status_line.len = 0;
1969     }
1970 
1971     return ngx_http_top_header_filter(r);
1972 }
1973 
1974 
1975 ngx_int_t
1976 ngx_http_output_filter(ngx_http_request_t *r, ngx_chain_t *in)
1977 {
1978     ngx_int_t          rc;
1979     ngx_connection_t  *c;
1980 
1981     c = r->connection;
1982 
1983     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
1984                    "http output filter \"%V?%V\"", &r->uri, &r->args);
1985 
1986     rc = ngx_http_top_body_filter(r, in);
1987 
1988     if (rc == NGX_ERROR) {
1989         /* NGX_ERROR may be returned by any filter */
1990         c->error = 1;
1991     }
1992 
1993     return rc;
1994 }
1995 
1996 
1997 u_char *
1998 ngx_http_map_uri_to_path(ngx_http_request_t *r, ngx_str_t *path,
1999     size_t *root_length, size_t reserved)
2000 {
2001     u_char                    *last;
2002     size_t                     alias;
2003     ngx_http_core_loc_conf_t  *clcf;
2004 
2005     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
2006 
2007     alias = clcf->alias;
2008 
2009     if (alias && !r->valid_location) {
2010         ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
2011                       "\"alias\" cannot be used in location \"%V\" "
2012                       "where URI was rewritten", &clcf->name);
2013         return NULL;
2014     }
2015 
2016     if (clcf->root_lengths == NULL) {
2017 
2018         *root_length = clcf->root.len;
2019 
2020         path->len = clcf->root.len + reserved + r->uri.len - alias + 1;
2021 
2022         path->data = ngx_pnalloc(r->pool, path->len);
2023         if (path->data == NULL) {
2024             return NULL;
2025         }
2026 
2027         last = ngx_copy(path->data, clcf->root.data, clcf->root.len);
2028 
2029     } else {
2030 
2031         if (alias == NGX_MAX_SIZE_T_VALUE) {
2032             reserved += r->add_uri_to_alias ? r->uri.len + 1 : 1;
2033 
2034         } else {
2035             reserved += r->uri.len - alias + 1;
2036         }
2037 
2038         if (ngx_http_script_run(r, path, clcf->root_lengths->elts, reserved,
2039                                 clcf->root_values->elts)
2040             == NULL)
2041         {
2042             return NULL;
2043         }
2044 
2045         if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, path)
2046             != NGX_OK)
2047         {
2048             return NULL;
2049         }
2050 
2051         *root_length = path->len - reserved;
2052         last = path->data + *root_length;
2053 
2054         if (alias == NGX_MAX_SIZE_T_VALUE) {
2055             if (!r->add_uri_to_alias) {
2056                 *last = '\0';
2057                 return last;
2058             }
2059 
2060             alias = 0;
2061         }
2062     }
2063 
2064     last = ngx_cpystrn(last, r->uri.data + alias, r->uri.len - alias + 1);
2065 
2066     return last;
2067 }
2068 
2069 
2070 ngx_int_t
2071 ngx_http_auth_basic_user(ngx_http_request_t *r)
2072 {
2073     ngx_str_t   auth, encoded;
2074     ngx_uint_t  len;
2075 
2076     if (r->headers_in.user.len == 0 && r->headers_in.user.data != NULL) {
2077         return NGX_DECLINED;
2078     }
2079 
2080     if (r->headers_in.authorization == NULL) {
2081         r->headers_in.user.data = (u_char *) "";
2082         return NGX_DECLINED;
2083     }
2084 
2085     encoded = r->headers_in.authorization->value;
2086 
2087     if (encoded.len < sizeof("Basic ") - 1
2088         || ngx_strncasecmp(encoded.data, (u_char *) "Basic ",
2089                            sizeof("Basic ") - 1)
2090            != 0)
2091     {
2092         r->headers_in.user.data = (u_char *) "";
2093         return NGX_DECLINED;
2094     }
2095 
2096     encoded.len -= sizeof("Basic ") - 1;
2097     encoded.data += sizeof("Basic ") - 1;
2098 
2099     while (encoded.len && encoded.data[0] == ' ') {
2100         encoded.len--;
2101         encoded.data++;
2102     }
2103 
2104     if (encoded.len == 0) {
2105         r->headers_in.user.data = (u_char *) "";
2106         return NGX_DECLINED;
2107     }
2108 
2109     auth.len = ngx_base64_decoded_length(encoded.len);
2110     auth.data = ngx_pnalloc(r->pool, auth.len + 1);
2111     if (auth.data == NULL) {
2112         return NGX_ERROR;
2113     }
2114 
2115     if (ngx_decode_base64(&auth, &encoded) != NGX_OK) {
2116         r->headers_in.user.data = (u_char *) "";
2117         return NGX_DECLINED;
2118     }
2119 
2120     auth.data[auth.len] = '\0';
2121 
2122     for (len = 0; len < auth.len; len++) {
2123         if (auth.data[len] == ':') {
2124             break;
2125         }
2126     }
2127 
2128     if (len == 0 || len == auth.len) {
2129         r->headers_in.user.data = (u_char *) "";
2130         return NGX_DECLINED;
2131     }
2132 
2133     r->headers_in.user.len = len;
2134     r->headers_in.user.data = auth.data;
2135     r->headers_in.passwd.len = auth.len - len - 1;
2136     r->headers_in.passwd.data = &auth.data[len + 1];
2137 
2138     return NGX_OK;
2139 }
2140 
2141 
2142 #if (NGX_HTTP_GZIP)
2143 
2144 ngx_int_t
2145 ngx_http_gzip_ok(ngx_http_request_t *r)
2146 {
2147     time_t                     date, expires;
2148     ngx_uint_t                 p;
2149     ngx_array_t               *cc;
2150     ngx_table_elt_t           *e, *d, *ae;
2151     ngx_http_core_loc_conf_t  *clcf;
2152 
2153     r->gzip_tested = 1;
2154 
2155     if (r != r->main) {
2156         return NGX_DECLINED;
2157     }
2158 
2159     ae = r->headers_in.accept_encoding;
2160     if (ae == NULL) {
2161         return NGX_DECLINED;
2162     }
2163 
2164     if (ae->value.len < sizeof("gzip") - 1) {
2165         return NGX_DECLINED;
2166     }
2167 
2168     /*
2169      * test first for the most common case "gzip,...":
2170      *   MSIE:    "gzip, deflate"
2171      *   Firefox: "gzip,deflate"
2172      *   Chrome:  "gzip,deflate,sdch"
2173      *   Safari:  "gzip, deflate"
2174      *   Opera:   "gzip, deflate"
2175      */
2176 
2177     if (ngx_memcmp(ae->value.data, "gzip,", 5) != 0
2178         && ngx_http_gzip_accept_encoding(&ae->value) != NGX_OK)
2179     {
2180         return NGX_DECLINED;
2181     }
2182 
2183     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
2184 
2185     if (r->headers_in.msie6 && clcf->gzip_disable_msie6) {
2186         return NGX_DECLINED;
2187     }
2188 
2189     if (r->http_version < clcf->gzip_http_version) {
2190         return NGX_DECLINED;
2191     }
2192 
2193     if (r->headers_in.via == NULL) {
2194         goto ok;
2195     }
2196 
2197     p = clcf->gzip_proxied;
2198 
2199     if (p & NGX_HTTP_GZIP_PROXIED_OFF) {
2200         return NGX_DECLINED;
2201     }
2202 
2203     if (p & NGX_HTTP_GZIP_PROXIED_ANY) {
2204         goto ok;
2205     }
2206 
2207     if (r->headers_in.authorization && (p & NGX_HTTP_GZIP_PROXIED_AUTH)) {
2208         goto ok;
2209     }
2210 
2211     e = r->headers_out.expires;
2212 
2213     if (e) {
2214 
2215         if (!(p & NGX_HTTP_GZIP_PROXIED_EXPIRED)) {
2216             return NGX_DECLINED;
2217         }
2218 
2219         expires = ngx_parse_http_time(e->value.data, e->value.len);
2220         if (expires == NGX_ERROR) {
2221             return NGX_DECLINED;
2222         }
2223 
2224         d = r->headers_out.date;
2225 
2226         if (d) {
2227             date = ngx_parse_http_time(d->value.data, d->value.len);
2228             if (date == NGX_ERROR) {
2229                 return NGX_DECLINED;
2230             }
2231 
2232         } else {
2233             date = ngx_time();
2234         }
2235 
2236         if (expires < date) {
2237             goto ok;
2238         }
2239 
2240         return NGX_DECLINED;
2241     }
2242 
2243     cc = &r->headers_out.cache_control;
2244 
2245     if (cc->elts) {
2246 
2247         if ((p & NGX_HTTP_GZIP_PROXIED_NO_CACHE)
2248             && ngx_http_parse_multi_header_lines(cc, &ngx_http_gzip_no_cache,
2249                                                  NULL)
2250                >= 0)
2251         {
2252             goto ok;
2253         }
2254 
2255         if ((p & NGX_HTTP_GZIP_PROXIED_NO_STORE)
2256             && ngx_http_parse_multi_header_lines(cc, &ngx_http_gzip_no_store,
2257                                                  NULL)
2258                >= 0)
2259         {
2260             goto ok;
2261         }
2262 
2263         if ((p & NGX_HTTP_GZIP_PROXIED_PRIVATE)
2264             && ngx_http_parse_multi_header_lines(cc, &ngx_http_gzip_private,
2265                                                  NULL)
2266                >= 0)
2267         {
2268             goto ok;
2269         }
2270 
2271         return NGX_DECLINED;
2272     }
2273 
2274     if ((p & NGX_HTTP_GZIP_PROXIED_NO_LM) && r->headers_out.last_modified) {
2275         return NGX_DECLINED;
2276     }
2277 
2278     if ((p & NGX_HTTP_GZIP_PROXIED_NO_ETAG) && r->headers_out.etag) {
2279         return NGX_DECLINED;
2280     }
2281 
2282 ok:
2283 
2284 #if (NGX_PCRE)
2285 
2286     if (clcf->gzip_disable && r->headers_in.user_agent) {
2287 
2288         if (ngx_regex_exec_array(clcf->gzip_disable,
2289                                  &r->headers_in.user_agent->value,
2290                                  r->connection->log)
2291             != NGX_DECLINED)
2292         {
2293             return NGX_DECLINED;
2294         }
2295     }
2296 
2297 #endif
2298 
2299     r->gzip_ok = 1;
2300 
2301     return NGX_OK;
2302 }
2303 
2304 
2305 /*
2306  * gzip is enabled for the following quantities:
2307  *     "gzip; q=0.001" ... "gzip; q=1.000"
2308  * gzip is disabled for the following quantities:
2309  *     "gzip; q=0" ... "gzip; q=0.000", and for any invalid cases
2310  */
2311 
2312 static ngx_int_t
2313 ngx_http_gzip_accept_encoding(ngx_str_t *ae)
2314 {
2315     u_char  *p, *start, *last;
2316 
2317     start = ae->data;
2318     last = start + ae->len;
2319 
2320     for ( ;; ) {
2321         p = ngx_strcasestrn(start, "gzip", 4 - 1);
2322         if (p == NULL) {
2323             return NGX_DECLINED;
2324         }
2325 
2326         if (p == start || (*(p - 1) == ',' || *(p - 1) == ' ')) {
2327             break;
2328         }
2329 
2330         start = p + 4;
2331     }
2332 
2333     p += 4;
2334 
2335     while (p < last) {
2336         switch (*p++) {
2337         case ',':
2338             return NGX_OK;
2339         case ';':
2340             goto quantity;
2341         case ' ':
2342             continue;
2343         default:
2344             return NGX_DECLINED;
2345         }
2346     }
2347 
2348     return NGX_OK;
2349 
2350 quantity:
2351 
2352     while (p < last) {
2353         switch (*p++) {
2354         case 'q':
2355         case 'Q':
2356             goto equal;
2357         case ' ':
2358             continue;
2359         default:
2360             return NGX_DECLINED;
2361         }
2362     }
2363 
2364     return NGX_OK;
2365 
2366 equal:
2367 
2368     if (p + 2 > last || *p++ != '=') {
2369         return NGX_DECLINED;
2370     }
2371 
2372     if (ngx_http_gzip_quantity(p, last) == 0) {
2373         return NGX_DECLINED;
2374     }
2375 
2376     return NGX_OK;
2377 }
2378 
2379 
2380 static ngx_uint_t
2381 ngx_http_gzip_quantity(u_char *p, u_char *last)
2382 {
2383     u_char      c;
2384     ngx_uint_t  n, q;
2385 
2386     c = *p++;
2387 
2388     if (c != '0' && c != '1') {
2389         return 0;
2390     }
2391 
2392     q = (c - '0') * 100;
2393 
2394     if (p == last) {
2395         return q;
2396     }
2397 
2398     c = *p++;
2399 
2400     if (c == ',' || c == ' ') {
2401         return q;
2402     }
2403 
2404     if (c != '.') {
2405         return 0;
2406     }
2407 
2408     n = 0;
2409 
2410     while (p < last) {
2411         c = *p++;
2412 
2413         if (c == ',' || c == ' ') {
2414             break;
2415         }
2416 
2417         if (c >= '0' && c <= '9') {
2418             q += c - '0';
2419             n++;
2420             continue;
2421         }
2422 
2423         return 0;
2424     }
2425 
2426     if (q > 100 || n > 3) {
2427         return 0;
2428     }
2429 
2430     return q;
2431 }
2432 
2433 #endif
2434 
2435 
2436 ngx_int_t
2437 ngx_http_subrequest(ngx_http_request_t *r,
2438     ngx_str_t *uri, ngx_str_t *args, ngx_http_request_t **psr,
2439     ngx_http_post_subrequest_t *ps, ngx_uint_t flags)
2440 {
2441     ngx_time_t                    *tp;
2442     ngx_connection_t              *c;
2443     ngx_http_request_t            *sr;
2444     ngx_http_core_srv_conf_t      *cscf;
2445     ngx_http_postponed_request_t  *pr, *p;
2446 
2447     if (r->subrequests == 0) {
2448         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2449                       "subrequests cycle while processing \"%V\"", uri);
2450         return NGX_ERROR;
2451     }
2452 
2453     /*
2454      * 1000 is reserved for other purposes.
2455      */
2456     if (r->main->count >= 65535 - 1000) {
2457         ngx_log_error(NGX_LOG_CRIT, r->connection->log, 0,
2458                       "request reference counter overflow "
2459                       "while processing \"%V\"", uri);
2460         return NGX_ERROR;
2461     }
2462 
2463     sr = ngx_pcalloc(r->pool, sizeof(ngx_http_request_t));
2464     if (sr == NULL) {
2465         return NGX_ERROR;
2466     }
2467 
2468     sr->signature = NGX_HTTP_MODULE;
2469 
2470     c = r->connection;
2471     sr->connection = c;
2472 
2473     sr->ctx = ngx_pcalloc(r->pool, sizeof(void *) * ngx_http_max_module);
2474     if (sr->ctx == NULL) {
2475         return NGX_ERROR;
2476     }
2477 
2478     if (ngx_list_init(&sr->headers_out.headers, r->pool, 20,
2479                       sizeof(ngx_table_elt_t))
2480         != NGX_OK)
2481     {
2482         return NGX_ERROR;
2483     }
2484 
2485     cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
2486     sr->main_conf = cscf->ctx->main_conf;
2487     sr->srv_conf = cscf->ctx->srv_conf;
2488     sr->loc_conf = cscf->ctx->loc_conf;
2489 
2490     sr->pool = r->pool;
2491 
2492     sr->headers_in = r->headers_in;
2493 
2494     ngx_http_clear_content_length(sr);
2495     ngx_http_clear_accept_ranges(sr);
2496     ngx_http_clear_last_modified(sr);
2497 
2498     sr->request_body = r->request_body;
2499 
2500 #if (NGX_HTTP_V2)
2501     sr->stream = r->stream;
2502 #endif
2503 
2504     sr->method = NGX_HTTP_GET;
2505     sr->http_version = r->http_version;
2506 
2507     sr->request_line = r->request_line;
2508     sr->uri = *uri;
2509 
2510     if (args) {
2511         sr->args = *args;
2512     }
2513 
2514     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
2515                    "http subrequest \"%V?%V\"", uri, &sr->args);
2516 
2517     sr->subrequest_in_memory = (flags & NGX_HTTP_SUBREQUEST_IN_MEMORY) != 0;
2518     sr->waited = (flags & NGX_HTTP_SUBREQUEST_WAITED) != 0;
2519 
2520     sr->unparsed_uri = r->unparsed_uri;
2521     sr->method_name = ngx_http_core_get_method;
2522     sr->http_protocol = r->http_protocol;
2523 
2524     ngx_http_set_exten(sr);
2525 
2526     sr->main = r->main;
2527     sr->parent = r;
2528     sr->post_subrequest = ps;
2529     sr->read_event_handler = ngx_http_request_empty_handler;
2530     sr->write_event_handler = ngx_http_handler;
2531 
2532     if (c->data == r && r->postponed == NULL) {
2533         c->data = sr;
2534     }
2535 
2536     sr->variables = r->variables;
2537 
2538     sr->log_handler = r->log_handler;
2539 
2540     pr = ngx_palloc(r->pool, sizeof(ngx_http_postponed_request_t));
2541     if (pr == NULL) {
2542         return NGX_ERROR;
2543     }
2544 
2545     pr->request = sr;
2546     pr->out = NULL;
2547     pr->next = NULL;
2548 
2549     if (r->postponed) {
2550         for (p = r->postponed; p->next; p = p->next) { /* void */ }
2551         p->next = pr;
2552 
2553     } else {
2554         r->postponed = pr;
2555     }
2556 
2557     sr->internal = 1;
2558 
2559     sr->discard_body = r->discard_body;
2560     sr->expect_tested = 1;
2561     sr->main_filter_need_in_memory = r->main_filter_need_in_memory;
2562 
2563     sr->uri_changes = NGX_HTTP_MAX_URI_CHANGES + 1;
2564     sr->subrequests = r->subrequests - 1;
2565 
2566     tp = ngx_timeofday();
2567     sr->start_sec = tp->sec;
2568     sr->start_msec = tp->msec;
2569 
2570     r->main->count++;
2571 
2572     *psr = sr;
2573 
2574     if (flags & NGX_HTTP_SUBREQUEST_CLONE) {
2575         sr->method = r->method;
2576         sr->method_name = r->method_name;
2577         sr->loc_conf = r->loc_conf;
2578         sr->valid_location = r->valid_location;
2579         sr->content_handler = r->content_handler;
2580         sr->phase_handler = r->phase_handler;
2581         sr->write_event_handler = ngx_http_core_run_phases;
2582 
2583         ngx_http_update_location_config(sr);
2584     }
2585 
2586     return ngx_http_post_request(sr, NULL);
2587 }
2588 
2589 
2590 ngx_int_t
2591 ngx_http_internal_redirect(ngx_http_request_t *r,
2592     ngx_str_t *uri, ngx_str_t *args)
2593 {
2594     ngx_http_core_srv_conf_t  *cscf;
2595 
2596     r->uri_changes--;
2597 
2598     if (r->uri_changes == 0) {
2599         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2600                       "rewrite or internal redirection cycle "
2601                       "while internally redirecting to \"%V\"", uri);
2602 
2603         r->main->count++;
2604         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
2605         return NGX_DONE;
2606     }
2607 
2608     r->uri = *uri;
2609 
2610     if (args) {
2611         r->args = *args;
2612 
2613     } else {
2614         ngx_str_null(&r->args);
2615     }
2616 
2617     ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2618                    "internal redirect: \"%V?%V\"", uri, &r->args);
2619 
2620     ngx_http_set_exten(r);
2621 
2622     /* clear the modules contexts */
2623     ngx_memzero(r->ctx, sizeof(void *) * ngx_http_max_module);
2624 
2625     cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
2626     r->loc_conf = cscf->ctx->loc_conf;
2627 
2628     ngx_http_update_location_config(r);
2629 
2630 #if (NGX_HTTP_CACHE)
2631     r->cache = NULL;
2632 #endif
2633 
2634     r->internal = 1;
2635     r->valid_unparsed_uri = 0;
2636     r->add_uri_to_alias = 0;
2637     r->main->count++;
2638 
2639     ngx_http_handler(r);
2640 
2641     return NGX_DONE;
2642 }
2643 
2644 
2645 ngx_int_t
2646 ngx_http_named_location(ngx_http_request_t *r, ngx_str_t *name)
2647 {
2648     ngx_http_core_srv_conf_t    *cscf;
2649     ngx_http_core_loc_conf_t   **clcfp;
2650     ngx_http_core_main_conf_t   *cmcf;
2651 
2652     r->main->count++;
2653     r->uri_changes--;
2654 
2655     if (r->uri_changes == 0) {
2656         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2657                       "rewrite or internal redirection cycle "
2658                       "while redirect to named location \"%V\"", name);
2659 
2660         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
2661         return NGX_DONE;
2662     }
2663 
2664     if (r->uri.len == 0) {
2665         ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2666                       "empty URI in redirect to named location \"%V\"", name);
2667 
2668         ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
2669         return NGX_DONE;
2670     }
2671 
2672     cscf = ngx_http_get_module_srv_conf(r, ngx_http_core_module);
2673 
2674     if (cscf->named_locations) {
2675 
2676         for (clcfp = cscf->named_locations; *clcfp; clcfp++) {
2677 
2678             ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2679                            "test location: \"%V\"", &(*clcfp)->name);
2680 
2681             if (name->len != (*clcfp)->name.len
2682                 || ngx_strncmp(name->data, (*clcfp)->name.data, name->len) != 0)
2683             {
2684                 continue;
2685             }
2686 
2687             ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2688                            "using location: %V \"%V?%V\"",
2689                            name, &r->uri, &r->args);
2690 
2691             r->internal = 1;
2692             r->content_handler = NULL;
2693             r->uri_changed = 0;
2694             r->loc_conf = (*clcfp)->loc_conf;
2695 
2696             /* clear the modules contexts */
2697             ngx_memzero(r->ctx, sizeof(void *) * ngx_http_max_module);
2698 
2699             ngx_http_update_location_config(r);
2700 
2701             cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
2702 
2703             r->phase_handler = cmcf->phase_engine.location_rewrite_index;
2704 
2705             r->write_event_handler = ngx_http_core_run_phases;
2706             ngx_http_core_run_phases(r);
2707 
2708             return NGX_DONE;
2709         }
2710     }
2711 
2712     ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2713                   "could not find named location \"%V\"", name);
2714 
2715     ngx_http_finalize_request(r, NGX_HTTP_INTERNAL_SERVER_ERROR);
2716 
2717     return NGX_DONE;
2718 }
2719 
2720 
2721 ngx_http_cleanup_t *
2722 ngx_http_cleanup_add(ngx_http_request_t *r, size_t size)
2723 {
2724     ngx_http_cleanup_t  *cln;
2725 
2726     r = r->main;
2727 
2728     cln = ngx_palloc(r->pool, sizeof(ngx_http_cleanup_t));
2729     if (cln == NULL) {
2730         return NULL;
2731     }
2732 
2733     if (size) {
2734         cln->data = ngx_palloc(r->pool, size);
2735         if (cln->data == NULL) {
2736             return NULL;
2737         }
2738 
2739     } else {
2740         cln->data = NULL;
2741     }
2742 
2743     cln->handler = NULL;
2744     cln->next = r->cleanup;
2745 
2746     r->cleanup = cln;
2747 
2748     ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2749                    "http cleanup add: %p", cln);
2750 
2751     return cln;
2752 }
2753 
2754 
2755 ngx_int_t
2756 ngx_http_set_disable_symlinks(ngx_http_request_t *r,
2757     ngx_http_core_loc_conf_t *clcf, ngx_str_t *path, ngx_open_file_info_t *of)
2758 {
2759 #if (NGX_HAVE_OPENAT)
2760     u_char     *p;
2761     ngx_str_t   from;
2762 
2763     of->disable_symlinks = clcf->disable_symlinks;
2764 
2765     if (clcf->disable_symlinks_from == NULL) {
2766         return NGX_OK;
2767     }
2768 
2769     if (ngx_http_complex_value(r, clcf->disable_symlinks_from, &from)
2770         != NGX_OK)
2771     {
2772         return NGX_ERROR;
2773     }
2774 
2775     if (from.len == 0
2776         || from.len > path->len
2777         || ngx_memcmp(path->data, from.data, from.len) != 0)
2778     {
2779         return NGX_OK;
2780     }
2781 
2782     if (from.len == path->len) {
2783         of->disable_symlinks = NGX_DISABLE_SYMLINKS_OFF;
2784         return NGX_OK;
2785     }
2786 
2787     p = path->data + from.len;
2788 
2789     if (*p == '/') {
2790         of->disable_symlinks_from = from.len;
2791         return NGX_OK;
2792     }
2793 
2794     p--;
2795 
2796     if (*p == '/') {
2797         of->disable_symlinks_from = from.len - 1;
2798     }
2799 #endif
2800 
2801     return NGX_OK;
2802 }
2803 
2804 
2805 ngx_int_t
2806 ngx_http_get_forwarded_addr(ngx_http_request_t *r, ngx_addr_t *addr,
2807     ngx_array_t *headers, ngx_str_t *value, ngx_array_t *proxies,
2808     int recursive)
2809 {
2810     ngx_int_t          rc;
2811     ngx_uint_t         i, found;
2812     ngx_table_elt_t  **h;
2813 
2814     if (headers == NULL) {
2815         return ngx_http_get_forwarded_addr_internal(r, addr, value->data,
2816                                                     value->len, proxies,
2817                                                     recursive);
2818     }
2819 
2820     i = headers->nelts;
2821     h = headers->elts;
2822 
2823     rc = NGX_DECLINED;
2824 
2825     found = 0;
2826 
2827     while (i-- > 0) {
2828         rc = ngx_http_get_forwarded_addr_internal(r, addr, h[i]->value.data,
2829                                                   h[i]->value.len, proxies,
2830                                                   recursive);
2831 
2832         if (!recursive) {
2833             break;
2834         }
2835 
2836         if (rc == NGX_DECLINED && found) {
2837             rc = NGX_DONE;
2838             break;
2839         }
2840 
2841         if (rc != NGX_OK) {
2842             break;
2843         }
2844 
2845         found = 1;
2846     }
2847 
2848     return rc;
2849 }
2850 
2851 
2852 static ngx_int_t
2853 ngx_http_get_forwarded_addr_internal(ngx_http_request_t *r, ngx_addr_t *addr,
2854     u_char *xff, size_t xfflen, ngx_array_t *proxies, int recursive)
2855 {
2856     u_char      *p;
2857     ngx_int_t    rc;
2858     ngx_addr_t   paddr;
2859 
2860     if (ngx_cidr_match(addr->sockaddr, proxies) != NGX_OK) {
2861         return NGX_DECLINED;
2862     }
2863 
2864     for (p = xff + xfflen - 1; p > xff; p--, xfflen--) {
2865         if (*p != ' ' && *p != ',') {
2866             break;
2867         }
2868     }
2869 
2870     for ( /* void */ ; p > xff; p--) {
2871         if (*p == ' ' || *p == ',') {
2872             p++;
2873             break;
2874         }
2875     }
2876 
2877     if (ngx_parse_addr_port(r->pool, &paddr, p, xfflen - (p - xff)) != NGX_OK) {
2878         return NGX_DECLINED;
2879     }
2880 
2881     *addr = paddr;
2882 
2883     if (recursive && p > xff) {
2884         rc = ngx_http_get_forwarded_addr_internal(r, addr, xff, p - 1 - xff,
2885                                                   proxies, 1);
2886 
2887         if (rc == NGX_DECLINED) {
2888             return NGX_DONE;
2889         }
2890 
2891         /* rc == NGX_OK || rc == NGX_DONE  */
2892         return rc;
2893     }
2894 
2895     return NGX_OK;
2896 }
2897 
2898 
2899 static char *
2900 ngx_http_core_server(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy)
2901 {
2902     char                        *rv;
2903     void                        *mconf;
2904     ngx_uint_t                   i;
2905     ngx_conf_t                   pcf;
2906     ngx_http_module_t           *module;
2907     struct sockaddr_in          *sin;
2908     ngx_http_conf_ctx_t         *ctx, *http_ctx;
2909     ngx_http_listen_opt_t        lsopt;
2910     ngx_http_core_srv_conf_t    *cscf, **cscfp;
2911     ngx_http_core_main_conf_t   *cmcf;
2912 
2913     ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
2914     if (ctx == NULL) {
2915         return NGX_CONF_ERROR;
2916     }
2917 
2918     http_ctx = cf->ctx;
2919     ctx->main_conf = http_ctx->main_conf;
2920 
2921     /* the server{}'s srv_conf */
2922 
2923     ctx->srv_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
2924     if (ctx->srv_conf == NULL) {
2925         return NGX_CONF_ERROR;
2926     }
2927 
2928     /* the server{}'s loc_conf */
2929 
2930     ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
2931     if (ctx->loc_conf == NULL) {
2932         return NGX_CONF_ERROR;
2933     }
2934 
2935     for (i = 0; cf->cycle->modules[i]; i++) {
2936         if (cf->cycle->modules[i]->type != NGX_HTTP_MODULE) {
2937             continue;
2938         }
2939 
2940         module = cf->cycle->modules[i]->ctx;
2941 
2942         if (module->create_srv_conf) {
2943             mconf = module->create_srv_conf(cf);
2944             if (mconf == NULL) {
2945                 return NGX_CONF_ERROR;
2946             }
2947 
2948             ctx->srv_conf[cf->cycle->modules[i]->ctx_index] = mconf;
2949         }
2950 
2951         if (module->create_loc_conf) {
2952             mconf = module->create_loc_conf(cf);
2953             if (mconf == NULL) {
2954                 return NGX_CONF_ERROR;
2955             }
2956 
2957             ctx->loc_conf[cf->cycle->modules[i]->ctx_index] = mconf;
2958         }
2959     }
2960 
2961 
2962     /* the server configuration context */
2963 
2964     cscf = ctx->srv_conf[ngx_http_core_module.ctx_index];
2965     cscf->ctx = ctx;
2966 
2967 
2968     cmcf = ctx->main_conf[ngx_http_core_module.ctx_index];
2969 
2970     cscfp = ngx_array_push(&cmcf->servers);
2971     if (cscfp == NULL) {
2972         return NGX_CONF_ERROR;
2973     }
2974 
2975     *cscfp = cscf;
2976 
2977 
2978     /* parse inside server{} */
2979 
2980     pcf = *cf;
2981     cf->ctx = ctx;
2982     cf->cmd_type = NGX_HTTP_SRV_CONF;
2983 
2984     rv = ngx_conf_parse(cf, NULL);
2985 
2986     *cf = pcf;
2987 
2988     if (rv == NGX_CONF_OK && !cscf->listen) {
2989         ngx_memzero(&lsopt, sizeof(ngx_http_listen_opt_t));
2990 
2991         sin = &lsopt.sockaddr.sockaddr_in;
2992 
2993         sin->sin_family = AF_INET;
2994 #if (NGX_WIN32)
2995         sin->sin_port = htons(80);
2996 #else
2997         sin->sin_port = htons((getuid() == 0) ? 80 : 8000);
2998 #endif
2999         sin->sin_addr.s_addr = INADDR_ANY;
3000 
3001         lsopt.socklen = sizeof(struct sockaddr_in);
3002 
3003         lsopt.backlog = NGX_LISTEN_BACKLOG;
3004         lsopt.rcvbuf = -1;
3005         lsopt.sndbuf = -1;
3006 #if (NGX_HAVE_SETFIB)
3007         lsopt.setfib = -1;
3008 #endif
3009 #if (NGX_HAVE_TCP_FASTOPEN)
3010         lsopt.fastopen = -1;
3011 #endif
3012         lsopt.wildcard = 1;
3013 
3014         (void) ngx_sock_ntop(&lsopt.sockaddr.sockaddr, lsopt.socklen,
3015                              lsopt.addr, NGX_SOCKADDR_STRLEN, 1);
3016 
3017         if (ngx_http_add_listen(cf, cscf, &lsopt) != NGX_OK) {
3018             return NGX_CONF_ERROR;
3019         }
3020     }
3021 
3022     return rv;
3023 }
3024 
3025 
3026 static char *
3027 ngx_http_core_location(ngx_conf_t *cf, ngx_command_t *cmd, void *dummy)
3028 {
3029     char                      *rv;
3030     u_char                    *mod;
3031     size_t                     len;
3032     ngx_str_t                 *value, *name;
3033     ngx_uint_t                 i;
3034     ngx_conf_t                 save;
3035     ngx_http_module_t         *module;
3036     ngx_http_conf_ctx_t       *ctx, *pctx;
3037     ngx_http_core_loc_conf_t  *clcf, *pclcf;
3038 
3039     ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
3040     if (ctx == NULL) {
3041         return NGX_CONF_ERROR;
3042     }
3043 
3044     pctx = cf->ctx;
3045     ctx->main_conf = pctx->main_conf;
3046     ctx->srv_conf = pctx->srv_conf;
3047 
3048     ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
3049     if (ctx->loc_conf == NULL) {
3050         return NGX_CONF_ERROR;
3051     }
3052 
3053     for (i = 0; cf->cycle->modules[i]; i++) {
3054         if (cf->cycle->modules[i]->type != NGX_HTTP_MODULE) {
3055             continue;
3056         }
3057 
3058         module = cf->cycle->modules[i]->ctx;
3059 
3060         if (module->create_loc_conf) {
3061             ctx->loc_conf[cf->cycle->modules[i]->ctx_index] =
3062                                                    module->create_loc_conf(cf);
3063             if (ctx->loc_conf[cf->cycle->modules[i]->ctx_index] == NULL) {
3064                 return NGX_CONF_ERROR;
3065             }
3066         }
3067     }
3068 
3069     clcf = ctx->loc_conf[ngx_http_core_module.ctx_index];
3070     clcf->loc_conf = ctx->loc_conf;
3071 
3072     value = cf->args->elts;
3073 
3074     if (cf->args->nelts == 3) {
3075 
3076         len = value[1].len;
3077         mod = value[1].data;
3078         name = &value[2];
3079 
3080         if (len == 1 && mod[0] == '=') {
3081 
3082             clcf->name = *name;
3083             clcf->exact_match = 1;
3084 
3085         } else if (len == 2 && mod[0] == '^' && mod[1] == '~') {
3086 
3087             clcf->name = *name;
3088             clcf->noregex = 1;
3089 
3090         } else if (len == 1 && mod[0] == '~') {
3091 
3092             if (ngx_http_core_regex_location(cf, clcf, name, 0) != NGX_OK) {
3093                 return NGX_CONF_ERROR;
3094             }
3095 
3096         } else if (len == 2 && mod[0] == '~' && mod[1] == '*') {
3097 
3098             if (ngx_http_core_regex_location(cf, clcf, name, 1) != NGX_OK) {
3099                 return NGX_CONF_ERROR;
3100             }
3101 
3102         } else {
3103             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3104                                "invalid location modifier \"%V\"", &value[1]);
3105             return NGX_CONF_ERROR;
3106         }
3107 
3108     } else {
3109 
3110         name = &value[1];
3111 
3112         if (name->data[0] == '=') {
3113 
3114             clcf->name.len = name->len - 1;
3115             clcf->name.data = name->data + 1;
3116             clcf->exact_match = 1;
3117 
3118         } else if (name->data[0] == '^' && name->data[1] == '~') {
3119 
3120             clcf->name.len = name->len - 2;
3121             clcf->name.data = name->data + 2;
3122             clcf->noregex = 1;
3123 
3124         } else if (name->data[0] == '~') {
3125 
3126             name->len--;
3127             name->data++;
3128 
3129             if (name->data[0] == '*') {
3130 
3131                 name->len--;
3132                 name->data++;
3133 
3134                 if (ngx_http_core_regex_location(cf, clcf, name, 1) != NGX_OK) {
3135                     return NGX_CONF_ERROR;
3136                 }
3137 
3138             } else {
3139                 if (ngx_http_core_regex_location(cf, clcf, name, 0) != NGX_OK) {
3140                     return NGX_CONF_ERROR;
3141                 }
3142             }
3143 
3144         } else {
3145 
3146             clcf->name = *name;
3147 
3148             if (name->data[0] == '@') {
3149                 clcf->named = 1;
3150             }
3151         }
3152     }
3153 
3154     pclcf = pctx->loc_conf[ngx_http_core_module.ctx_index];
3155 
3156     if (cf->cmd_type == NGX_HTTP_LOC_CONF) {
3157 
3158         /* nested location */
3159 
3160 #if 0
3161         clcf->prev_location = pclcf;
3162 #endif
3163 
3164         if (pclcf->exact_match) {
3165             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3166                                "location \"%V\" cannot be inside "
3167                                "the exact location \"%V\"",
3168                                &clcf->name, &pclcf->name);
3169             return NGX_CONF_ERROR;
3170         }
3171 
3172         if (pclcf->named) {
3173             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3174                                "location \"%V\" cannot be inside "
3175                                "the named location \"%V\"",
3176                                &clcf->name, &pclcf->name);
3177             return NGX_CONF_ERROR;
3178         }
3179 
3180         if (clcf->named) {
3181             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3182                                "named location \"%V\" can be "
3183                                "on the server level only",
3184                                &clcf->name);
3185             return NGX_CONF_ERROR;
3186         }
3187 
3188         len = pclcf->name.len;
3189 
3190 #if (NGX_PCRE)
3191         if (clcf->regex == NULL
3192             && ngx_filename_cmp(clcf->name.data, pclcf->name.data, len) != 0)
3193 #else
3194         if (ngx_filename_cmp(clcf->name.data, pclcf->name.data, len) != 0)
3195 #endif
3196         {
3197             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3198                                "location \"%V\" is outside location \"%V\"",
3199                                &clcf->name, &pclcf->name);
3200             return NGX_CONF_ERROR;
3201         }
3202     }
3203 
3204     if (ngx_http_add_location(cf, &pclcf->locations, clcf) != NGX_OK) {
3205         return NGX_CONF_ERROR;
3206     }
3207 
3208     save = *cf;
3209     cf->ctx = ctx;
3210     cf->cmd_type = NGX_HTTP_LOC_CONF;
3211 
3212     rv = ngx_conf_parse(cf, NULL);
3213 
3214     *cf = save;
3215 
3216     return rv;
3217 }
3218 
3219 
3220 static ngx_int_t
3221 ngx_http_core_regex_location(ngx_conf_t *cf, ngx_http_core_loc_conf_t *clcf,
3222     ngx_str_t *regex, ngx_uint_t caseless)
3223 {
3224 #if (NGX_PCRE)
3225     ngx_regex_compile_t  rc;
3226     u_char               errstr[NGX_MAX_CONF_ERRSTR];
3227 
3228     ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
3229 
3230     rc.pattern = *regex;
3231     rc.err.len = NGX_MAX_CONF_ERRSTR;
3232     rc.err.data = errstr;
3233 
3234 #if (NGX_HAVE_CASELESS_FILESYSTEM)
3235     rc.options = NGX_REGEX_CASELESS;
3236 #else
3237     rc.options = caseless ? NGX_REGEX_CASELESS : 0;
3238 #endif
3239 
3240     clcf->regex = ngx_http_regex_compile(cf, &rc);
3241     if (clcf->regex == NULL) {
3242         return NGX_ERROR;
3243     }
3244 
3245     clcf->name = *regex;
3246 
3247     return NGX_OK;
3248 
3249 #else
3250 
3251     ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3252                        "using regex \"%V\" requires PCRE library",
3253                        regex);
3254     return NGX_ERROR;
3255 
3256 #endif
3257 }
3258 
3259 
3260 static char *
3261 ngx_http_core_types(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
3262 {
3263     ngx_http_core_loc_conf_t *clcf = conf;
3264 
3265     char        *rv;
3266     ngx_conf_t   save;
3267 
3268     if (clcf->types == NULL) {
3269         clcf->types = ngx_array_create(cf->pool, 64, sizeof(ngx_hash_key_t));
3270         if (clcf->types == NULL) {
3271             return NGX_CONF_ERROR;
3272         }
3273     }
3274 
3275     save = *cf;
3276     cf->handler = ngx_http_core_type;
3277     cf->handler_conf = conf;
3278 
3279     rv = ngx_conf_parse(cf, NULL);
3280 
3281     *cf = save;
3282 
3283     return rv;
3284 }
3285 
3286 
3287 static char *
3288 ngx_http_core_type(ngx_conf_t *cf, ngx_command_t *dummy, void *conf)
3289 {
3290     ngx_http_core_loc_conf_t *clcf = conf;
3291 
3292     ngx_str_t       *value, *content_type, *old;
3293     ngx_uint_t       i, n, hash;
3294     ngx_hash_key_t  *type;
3295 
3296     value = cf->args->elts;
3297 
3298     if (ngx_strcmp(value[0].data, "include") == 0) {
3299         if (cf->args->nelts != 2) {
3300             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3301                                "invalid number of arguments"
3302                                " in \"include\" directive");
3303             return NGX_CONF_ERROR;
3304         }
3305 
3306         return ngx_conf_include(cf, dummy, conf);
3307     }
3308 
3309     content_type = ngx_palloc(cf->pool, sizeof(ngx_str_t));
3310     if (content_type == NULL) {
3311         return NGX_CONF_ERROR;
3312     }
3313 
3314     *content_type = value[0];
3315 
3316     for (i = 1; i < cf->args->nelts; i++) {
3317 
3318         hash = ngx_hash_strlow(value[i].data, value[i].data, value[i].len);
3319 
3320         type = clcf->types->elts;
3321         for (n = 0; n < clcf->types->nelts; n++) {
3322             if (ngx_strcmp(value[i].data, type[n].key.data) == 0) {
3323                 old = type[n].value;
3324                 type[n].value = content_type;
3325 
3326                 ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
3327                                    "duplicate extension \"%V\", "
3328                                    "content type: \"%V\", "
3329                                    "previous content type: \"%V\"",
3330                                    &value[i], content_type, old);
3331                 goto next;
3332             }
3333         }
3334 
3335 
3336         type = ngx_array_push(clcf->types);
3337         if (type == NULL) {
3338             return NGX_CONF_ERROR;
3339         }
3340 
3341         type->key = value[i];
3342         type->key_hash = hash;
3343         type->value = content_type;
3344 
3345     next:
3346         continue;
3347     }
3348 
3349     return NGX_CONF_OK;
3350 }
3351 
3352 
3353 static ngx_int_t
3354 ngx_http_core_preconfiguration(ngx_conf_t *cf)
3355 {
3356     return ngx_http_variables_add_core_vars(cf);
3357 }
3358 
3359 
3360 static ngx_int_t
3361 ngx_http_core_postconfiguration(ngx_conf_t *cf)
3362 {
3363     ngx_http_top_request_body_filter = ngx_http_request_body_save_filter;
3364 
3365     return NGX_OK;
3366 }
3367 
3368 
3369 static void *
3370 ngx_http_core_create_main_conf(ngx_conf_t *cf)
3371 {
3372     ngx_http_core_main_conf_t  *cmcf;
3373 
3374     cmcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_core_main_conf_t));
3375     if (cmcf == NULL) {
3376         return NULL;
3377     }
3378 
3379     if (ngx_array_init(&cmcf->servers, cf->pool, 4,
3380                        sizeof(ngx_http_core_srv_conf_t *))
3381         != NGX_OK)
3382     {
3383         return NULL;
3384     }
3385 
3386     cmcf->server_names_hash_max_size = NGX_CONF_UNSET_UINT;
3387     cmcf->server_names_hash_bucket_size = NGX_CONF_UNSET_UINT;
3388 
3389     cmcf->variables_hash_max_size = NGX_CONF_UNSET_UINT;
3390     cmcf->variables_hash_bucket_size = NGX_CONF_UNSET_UINT;
3391 
3392     return cmcf;
3393 }
3394 
3395 
3396 static char *
3397 ngx_http_core_init_main_conf(ngx_conf_t *cf, void *conf)
3398 {
3399     ngx_http_core_main_conf_t *cmcf = conf;
3400 
3401     ngx_conf_init_uint_value(cmcf->server_names_hash_max_size, 512);
3402     ngx_conf_init_uint_value(cmcf->server_names_hash_bucket_size,
3403                              ngx_cacheline_size);
3404 
3405     cmcf->server_names_hash_bucket_size =
3406             ngx_align(cmcf->server_names_hash_bucket_size, ngx_cacheline_size);
3407 
3408 
3409     ngx_conf_init_uint_value(cmcf->variables_hash_max_size, 1024);
3410     ngx_conf_init_uint_value(cmcf->variables_hash_bucket_size, 64);
3411 
3412     cmcf->variables_hash_bucket_size =
3413                ngx_align(cmcf->variables_hash_bucket_size, ngx_cacheline_size);
3414 
3415     if (cmcf->ncaptures) {
3416         cmcf->ncaptures = (cmcf->ncaptures + 1) * 3;
3417     }
3418 
3419     return NGX_CONF_OK;
3420 }
3421 
3422 
3423 static void *
3424 ngx_http_core_create_srv_conf(ngx_conf_t *cf)
3425 {
3426     ngx_http_core_srv_conf_t  *cscf;
3427 
3428     cscf = ngx_pcalloc(cf->pool, sizeof(ngx_http_core_srv_conf_t));
3429     if (cscf == NULL) {
3430         return NULL;
3431     }
3432 
3433     /*
3434      * set by ngx_pcalloc():
3435      *
3436      *     conf->client_large_buffers.num = 0;
3437      */
3438 
3439     if (ngx_array_init(&cscf->server_names, cf->temp_pool, 4,
3440                        sizeof(ngx_http_server_name_t))
3441         != NGX_OK)
3442     {
3443         return NULL;
3444     }
3445 
3446     cscf->connection_pool_size = NGX_CONF_UNSET_SIZE;
3447     cscf->request_pool_size = NGX_CONF_UNSET_SIZE;
3448     cscf->client_header_timeout = NGX_CONF_UNSET_MSEC;
3449     cscf->client_header_buffer_size = NGX_CONF_UNSET_SIZE;
3450     cscf->ignore_invalid_headers = NGX_CONF_UNSET;
3451     cscf->merge_slashes = NGX_CONF_UNSET;
3452     cscf->underscores_in_headers = NGX_CONF_UNSET;
3453 
3454     return cscf;
3455 }
3456 
3457 
3458 static char *
3459 ngx_http_core_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child)
3460 {
3461     ngx_http_core_srv_conf_t *prev = parent;
3462     ngx_http_core_srv_conf_t *conf = child;
3463 
3464     ngx_str_t                name;
3465     ngx_http_server_name_t  *sn;
3466 
3467     /* TODO: it does not merge, it inits only */
3468 
3469     ngx_conf_merge_size_value(conf->connection_pool_size,
3470                               prev->connection_pool_size, 64 * sizeof(void *));
3471     ngx_conf_merge_size_value(conf->request_pool_size,
3472                               prev->request_pool_size, 4096);
3473     ngx_conf_merge_msec_value(conf->client_header_timeout,
3474                               prev->client_header_timeout, 60000);
3475     ngx_conf_merge_size_value(conf->client_header_buffer_size,
3476                               prev->client_header_buffer_size, 1024);
3477     ngx_conf_merge_bufs_value(conf->large_client_header_buffers,
3478                               prev->large_client_header_buffers,
3479                               4, 8192);
3480 
3481     if (conf->large_client_header_buffers.size < conf->connection_pool_size) {
3482         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3483                            "the \"large_client_header_buffers\" size must be "
3484                            "equal to or greater than \"connection_pool_size\"");
3485         return NGX_CONF_ERROR;
3486     }
3487 
3488     ngx_conf_merge_value(conf->ignore_invalid_headers,
3489                               prev->ignore_invalid_headers, 1);
3490 
3491     ngx_conf_merge_value(conf->merge_slashes, prev->merge_slashes, 1);
3492 
3493     ngx_conf_merge_value(conf->underscores_in_headers,
3494                               prev->underscores_in_headers, 0);
3495 
3496     if (conf->server_names.nelts == 0) {
3497         /* the array has 4 empty preallocated elements, so push cannot fail */
3498         sn = ngx_array_push(&conf->server_names);
3499 #if (NGX_PCRE)
3500         sn->regex = NULL;
3501 #endif
3502         sn->server = conf;
3503         ngx_str_set(&sn->name, "");
3504     }
3505 
3506     sn = conf->server_names.elts;
3507     name = sn[0].name;
3508 
3509 #if (NGX_PCRE)
3510     if (sn->regex) {
3511         name.len++;
3512         name.data--;
3513     } else
3514 #endif
3515 
3516     if (name.data[0] == '.') {
3517         name.len--;
3518         name.data++;
3519     }
3520 
3521     conf->server_name.len = name.len;
3522     conf->server_name.data = ngx_pstrdup(cf->pool, &name);
3523     if (conf->server_name.data == NULL) {
3524         return NGX_CONF_ERROR;
3525     }
3526 
3527     return NGX_CONF_OK;
3528 }
3529 
3530 
3531 static void *
3532 ngx_http_core_create_loc_conf(ngx_conf_t *cf)
3533 {
3534     ngx_http_core_loc_conf_t  *clcf;
3535 
3536     clcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_core_loc_conf_t));
3537     if (clcf == NULL) {
3538         return NULL;
3539     }
3540 
3541     /*
3542      * set by ngx_pcalloc():
3543      *
3544      *     clcf->root = { 0, NULL };
3545      *     clcf->limit_except = 0;
3546      *     clcf->post_action = { 0, NULL };
3547      *     clcf->types = NULL;
3548      *     clcf->default_type = { 0, NULL };
3549      *     clcf->error_log = NULL;
3550      *     clcf->error_pages = NULL;
3551      *     clcf->try_files = NULL;
3552      *     clcf->client_body_path = NULL;
3553      *     clcf->regex = NULL;
3554      *     clcf->exact_match = 0;
3555      *     clcf->auto_redirect = 0;
3556      *     clcf->alias = 0;
3557      *     clcf->gzip_proxied = 0;
3558      *     clcf->keepalive_disable = 0;
3559      */
3560 
3561     clcf->client_max_body_size = NGX_CONF_UNSET;
3562     clcf->client_body_buffer_size = NGX_CONF_UNSET_SIZE;
3563     clcf->client_body_timeout = NGX_CONF_UNSET_MSEC;
3564     clcf->satisfy = NGX_CONF_UNSET_UINT;
3565     clcf->if_modified_since = NGX_CONF_UNSET_UINT;
3566     clcf->max_ranges = NGX_CONF_UNSET_UINT;
3567     clcf->client_body_in_file_only = NGX_CONF_UNSET_UINT;
3568     clcf->client_body_in_single_buffer = NGX_CONF_UNSET;
3569     clcf->internal = NGX_CONF_UNSET;
3570     clcf->sendfile = NGX_CONF_UNSET;
3571     clcf->sendfile_max_chunk = NGX_CONF_UNSET_SIZE;
3572     clcf->aio = NGX_CONF_UNSET;
3573     clcf->aio_write = NGX_CONF_UNSET;
3574 #if (NGX_THREADS)
3575     clcf->thread_pool = NGX_CONF_UNSET_PTR;
3576     clcf->thread_pool_value = NGX_CONF_UNSET_PTR;
3577 #endif
3578     clcf->read_ahead = NGX_CONF_UNSET_SIZE;
3579     clcf->directio = NGX_CONF_UNSET;
3580     clcf->directio_alignment = NGX_CONF_UNSET;
3581     clcf->tcp_nopush = NGX_CONF_UNSET;
3582     clcf->tcp_nodelay = NGX_CONF_UNSET;
3583     clcf->send_timeout = NGX_CONF_UNSET_MSEC;
3584     clcf->send_lowat = NGX_CONF_UNSET_SIZE;
3585     clcf->postpone_output = NGX_CONF_UNSET_SIZE;
3586     clcf->limit_rate = NGX_CONF_UNSET_SIZE;
3587     clcf->limit_rate_after = NGX_CONF_UNSET_SIZE;
3588     clcf->keepalive_timeout = NGX_CONF_UNSET_MSEC;
3589     clcf->keepalive_header = NGX_CONF_UNSET;
3590     clcf->keepalive_requests = NGX_CONF_UNSET_UINT;
3591     clcf->lingering_close = NGX_CONF_UNSET_UINT;
3592     clcf->lingering_time = NGX_CONF_UNSET_MSEC;
3593     clcf->lingering_timeout = NGX_CONF_UNSET_MSEC;
3594     clcf->resolver_timeout = NGX_CONF_UNSET_MSEC;
3595     clcf->reset_timedout_connection = NGX_CONF_UNSET;
3596     clcf->absolute_redirect = NGX_CONF_UNSET;
3597     clcf->server_name_in_redirect = NGX_CONF_UNSET;
3598     clcf->port_in_redirect = NGX_CONF_UNSET;
3599     clcf->msie_padding = NGX_CONF_UNSET;
3600     clcf->msie_refresh = NGX_CONF_UNSET;
3601     clcf->log_not_found = NGX_CONF_UNSET;
3602     clcf->log_subrequest = NGX_CONF_UNSET;
3603     clcf->recursive_error_pages = NGX_CONF_UNSET;
3604     clcf->chunked_transfer_encoding = NGX_CONF_UNSET;
3605     clcf->etag = NGX_CONF_UNSET;
3606     clcf->server_tokens = NGX_CONF_UNSET_UINT;
3607     clcf->types_hash_max_size = NGX_CONF_UNSET_UINT;
3608     clcf->types_hash_bucket_size = NGX_CONF_UNSET_UINT;
3609 
3610     clcf->open_file_cache = NGX_CONF_UNSET_PTR;
3611     clcf->open_file_cache_valid = NGX_CONF_UNSET;
3612     clcf->open_file_cache_min_uses = NGX_CONF_UNSET_UINT;
3613     clcf->open_file_cache_errors = NGX_CONF_UNSET;
3614     clcf->open_file_cache_events = NGX_CONF_UNSET;
3615 
3616 #if (NGX_HTTP_GZIP)
3617     clcf->gzip_vary = NGX_CONF_UNSET;
3618     clcf->gzip_http_version = NGX_CONF_UNSET_UINT;
3619 #if (NGX_PCRE)
3620     clcf->gzip_disable = NGX_CONF_UNSET_PTR;
3621 #endif
3622     clcf->gzip_disable_msie6 = 3;
3623 #if (NGX_HTTP_DEGRADATION)
3624     clcf->gzip_disable_degradation = 3;
3625 #endif
3626 #endif
3627 
3628 #if (NGX_HAVE_OPENAT)
3629     clcf->disable_symlinks = NGX_CONF_UNSET_UINT;
3630     clcf->disable_symlinks_from = NGX_CONF_UNSET_PTR;
3631 #endif
3632 
3633     return clcf;
3634 }
3635 
3636 
3637 static ngx_str_t  ngx_http_core_text_html_type = ngx_string("text/html");
3638 static ngx_str_t  ngx_http_core_image_gif_type = ngx_string("image/gif");
3639 static ngx_str_t  ngx_http_core_image_jpeg_type = ngx_string("image/jpeg");
3640 
3641 static ngx_hash_key_t  ngx_http_core_default_types[] = {
3642     { ngx_string("html"), 0, &ngx_http_core_text_html_type },
3643     { ngx_string("gif"), 0, &ngx_http_core_image_gif_type },
3644     { ngx_string("jpg"), 0, &ngx_http_core_image_jpeg_type },
3645     { ngx_null_string, 0, NULL }
3646 };
3647 
3648 
3649 static char *
3650 ngx_http_core_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
3651 {
3652     ngx_http_core_loc_conf_t *prev = parent;
3653     ngx_http_core_loc_conf_t *conf = child;
3654 
3655     ngx_uint_t        i;
3656     ngx_hash_key_t   *type;
3657     ngx_hash_init_t   types_hash;
3658 
3659     if (conf->root.data == NULL) {
3660 
3661         conf->alias = prev->alias;
3662         conf->root = prev->root;
3663         conf->root_lengths = prev->root_lengths;
3664         conf->root_values = prev->root_values;
3665 
3666         if (prev->root.data == NULL) {
3667             ngx_str_set(&conf->root, "html");
3668 
3669             if (ngx_conf_full_name(cf->cycle, &conf->root, 0) != NGX_OK) {
3670                 return NGX_CONF_ERROR;
3671             }
3672         }
3673     }
3674 
3675     if (conf->post_action.data == NULL) {
3676         conf->post_action = prev->post_action;
3677     }
3678 
3679     ngx_conf_merge_uint_value(conf->types_hash_max_size,
3680                               prev->types_hash_max_size, 1024);
3681 
3682     ngx_conf_merge_uint_value(conf->types_hash_bucket_size,
3683                               prev->types_hash_bucket_size, 64);
3684 
3685     conf->types_hash_bucket_size = ngx_align(conf->types_hash_bucket_size,
3686                                              ngx_cacheline_size);
3687 
3688     /*
3689      * the special handling of the "types" directive in the "http" section
3690      * to inherit the http's conf->types_hash to all servers
3691      */
3692 
3693     if (prev->types && prev->types_hash.buckets == NULL) {
3694 
3695         types_hash.hash = &prev->types_hash;
3696         types_hash.key = ngx_hash_key_lc;
3697         types_hash.max_size = conf->types_hash_max_size;
3698         types_hash.bucket_size = conf->types_hash_bucket_size;
3699         types_hash.name = "types_hash";
3700         types_hash.pool = cf->pool;
3701         types_hash.temp_pool = NULL;
3702 
3703         if (ngx_hash_init(&types_hash, prev->types->elts, prev->types->nelts)
3704             != NGX_OK)
3705         {
3706             return NGX_CONF_ERROR;
3707         }
3708     }
3709 
3710     if (conf->types == NULL) {
3711         conf->types = prev->types;
3712         conf->types_hash = prev->types_hash;
3713     }
3714 
3715     if (conf->types == NULL) {
3716         conf->types = ngx_array_create(cf->pool, 3, sizeof(ngx_hash_key_t));
3717         if (conf->types == NULL) {
3718             return NGX_CONF_ERROR;
3719         }
3720 
3721         for (i = 0; ngx_http_core_default_types[i].key.len; i++) {
3722             type = ngx_array_push(conf->types);
3723             if (type == NULL) {
3724                 return NGX_CONF_ERROR;
3725             }
3726 
3727             type->key = ngx_http_core_default_types[i].key;
3728             type->key_hash =
3729                        ngx_hash_key_lc(ngx_http_core_default_types[i].key.data,
3730                                        ngx_http_core_default_types[i].key.len);
3731             type->value = ngx_http_core_default_types[i].value;
3732         }
3733     }
3734 
3735     if (conf->types_hash.buckets == NULL) {
3736 
3737         types_hash.hash = &conf->types_hash;
3738         types_hash.key = ngx_hash_key_lc;
3739         types_hash.max_size = conf->types_hash_max_size;
3740         types_hash.bucket_size = conf->types_hash_bucket_size;
3741         types_hash.name = "types_hash";
3742         types_hash.pool = cf->pool;
3743         types_hash.temp_pool = NULL;
3744 
3745         if (ngx_hash_init(&types_hash, conf->types->elts, conf->types->nelts)
3746             != NGX_OK)
3747         {
3748             return NGX_CONF_ERROR;
3749         }
3750     }
3751 
3752     if (conf->error_log == NULL) {
3753         if (prev->error_log) {
3754             conf->error_log = prev->error_log;
3755         } else {
3756             conf->error_log = &cf->cycle->new_log;
3757         }
3758     }
3759 
3760     if (conf->error_pages == NULL && prev->error_pages) {
3761         conf->error_pages = prev->error_pages;
3762     }
3763 
3764     ngx_conf_merge_str_value(conf->default_type,
3765                               prev->default_type, "text/plain");
3766 
3767     ngx_conf_merge_off_value(conf->client_max_body_size,
3768                               prev->client_max_body_size, 1 * 1024 * 1024);
3769     ngx_conf_merge_size_value(conf->client_body_buffer_size,
3770                               prev->client_body_buffer_size,
3771                               (size_t) 2 * ngx_pagesize);
3772     ngx_conf_merge_msec_value(conf->client_body_timeout,
3773                               prev->client_body_timeout, 60000);
3774 
3775     ngx_conf_merge_bitmask_value(conf->keepalive_disable,
3776                               prev->keepalive_disable,
3777                               (NGX_CONF_BITMASK_SET
3778                                |NGX_HTTP_KEEPALIVE_DISABLE_MSIE6));
3779     ngx_conf_merge_uint_value(conf->satisfy, prev->satisfy,
3780                               NGX_HTTP_SATISFY_ALL);
3781     ngx_conf_merge_uint_value(conf->if_modified_since, prev->if_modified_since,
3782                               NGX_HTTP_IMS_EXACT);
3783     ngx_conf_merge_uint_value(conf->max_ranges, prev->max_ranges,
3784                               NGX_MAX_INT32_VALUE);
3785     ngx_conf_merge_uint_value(conf->client_body_in_file_only,
3786                               prev->client_body_in_file_only,
3787                               NGX_HTTP_REQUEST_BODY_FILE_OFF);
3788     ngx_conf_merge_value(conf->client_body_in_single_buffer,
3789                               prev->client_body_in_single_buffer, 0);
3790     ngx_conf_merge_value(conf->internal, prev->internal, 0);
3791     ngx_conf_merge_value(conf->sendfile, prev->sendfile, 0);
3792     ngx_conf_merge_size_value(conf->sendfile_max_chunk,
3793                               prev->sendfile_max_chunk, 0);
3794     ngx_conf_merge_value(conf->aio, prev->aio, NGX_HTTP_AIO_OFF);
3795     ngx_conf_merge_value(conf->aio_write, prev->aio_write, 0);
3796 #if (NGX_THREADS)
3797     ngx_conf_merge_ptr_value(conf->thread_pool, prev->thread_pool, NULL);
3798     ngx_conf_merge_ptr_value(conf->thread_pool_value, prev->thread_pool_value,
3799                              NULL);
3800 #endif
3801     ngx_conf_merge_size_value(conf->read_ahead, prev->read_ahead, 0);
3802     ngx_conf_merge_off_value(conf->directio, prev->directio,
3803                               NGX_OPEN_FILE_DIRECTIO_OFF);
3804     ngx_conf_merge_off_value(conf->directio_alignment, prev->directio_alignment,
3805                               512);
3806     ngx_conf_merge_value(conf->tcp_nopush, prev->tcp_nopush, 0);
3807     ngx_conf_merge_value(conf->tcp_nodelay, prev->tcp_nodelay, 1);
3808 
3809     ngx_conf_merge_msec_value(conf->send_timeout, prev->send_timeout, 60000);
3810     ngx_conf_merge_size_value(conf->send_lowat, prev->send_lowat, 0);
3811     ngx_conf_merge_size_value(conf->postpone_output, prev->postpone_output,
3812                               1460);
3813     ngx_conf_merge_size_value(conf->limit_rate, prev->limit_rate, 0);
3814     ngx_conf_merge_size_value(conf->limit_rate_after, prev->limit_rate_after,
3815                               0);
3816     ngx_conf_merge_msec_value(conf->keepalive_timeout,
3817                               prev->keepalive_timeout, 75000);
3818     ngx_conf_merge_sec_value(conf->keepalive_header,
3819                               prev->keepalive_header, 0);
3820     ngx_conf_merge_uint_value(conf->keepalive_requests,
3821                               prev->keepalive_requests, 100);
3822     ngx_conf_merge_uint_value(conf->lingering_close,
3823                               prev->lingering_close, NGX_HTTP_LINGERING_ON);
3824     ngx_conf_merge_msec_value(conf->lingering_time,
3825                               prev->lingering_time, 30000);
3826     ngx_conf_merge_msec_value(conf->lingering_timeout,
3827                               prev->lingering_timeout, 5000);
3828     ngx_conf_merge_msec_value(conf->resolver_timeout,
3829                               prev->resolver_timeout, 30000);
3830 
3831     if (conf->resolver == NULL) {
3832 
3833         if (prev->resolver == NULL) {
3834 
3835             /*
3836              * create dummy resolver in http {} context
3837              * to inherit it in all servers
3838              */
3839 
3840             prev->resolver = ngx_resolver_create(cf, NULL, 0);
3841             if (prev->resolver == NULL) {
3842                 return NGX_CONF_ERROR;
3843             }
3844         }
3845 
3846         conf->resolver = prev->resolver;
3847     }
3848 
3849     if (ngx_conf_merge_path_value(cf, &conf->client_body_temp_path,
3850                               prev->client_body_temp_path,
3851                               &ngx_http_client_temp_path)
3852         != NGX_OK)
3853     {
3854         return NGX_CONF_ERROR;
3855     }
3856 
3857     ngx_conf_merge_value(conf->reset_timedout_connection,
3858                               prev->reset_timedout_connection, 0);
3859     ngx_conf_merge_value(conf->absolute_redirect,
3860                               prev->absolute_redirect, 1);
3861     ngx_conf_merge_value(conf->server_name_in_redirect,
3862                               prev->server_name_in_redirect, 0);
3863     ngx_conf_merge_value(conf->port_in_redirect, prev->port_in_redirect, 1);
3864     ngx_conf_merge_value(conf->msie_padding, prev->msie_padding, 1);
3865     ngx_conf_merge_value(conf->msie_refresh, prev->msie_refresh, 0);
3866     ngx_conf_merge_value(conf->log_not_found, prev->log_not_found, 1);
3867     ngx_conf_merge_value(conf->log_subrequest, prev->log_subrequest, 0);
3868     ngx_conf_merge_value(conf->recursive_error_pages,
3869                               prev->recursive_error_pages, 0);
3870     ngx_conf_merge_value(conf->chunked_transfer_encoding,
3871                               prev->chunked_transfer_encoding, 1);
3872     ngx_conf_merge_value(conf->etag, prev->etag, 1);
3873 
3874     ngx_conf_merge_uint_value(conf->server_tokens, prev->server_tokens,
3875                               NGX_HTTP_SERVER_TOKENS_ON);
3876 
3877     ngx_conf_merge_ptr_value(conf->open_file_cache,
3878                               prev->open_file_cache, NULL);
3879 
3880     ngx_conf_merge_sec_value(conf->open_file_cache_valid,
3881                               prev->open_file_cache_valid, 60);
3882 
3883     ngx_conf_merge_uint_value(conf->open_file_cache_min_uses,
3884                               prev->open_file_cache_min_uses, 1);
3885 
3886     ngx_conf_merge_sec_value(conf->open_file_cache_errors,
3887                               prev->open_file_cache_errors, 0);
3888 
3889     ngx_conf_merge_sec_value(conf->open_file_cache_events,
3890                               prev->open_file_cache_events, 0);
3891 #if (NGX_HTTP_GZIP)
3892 
3893     ngx_conf_merge_value(conf->gzip_vary, prev->gzip_vary, 0);
3894     ngx_conf_merge_uint_value(conf->gzip_http_version, prev->gzip_http_version,
3895                               NGX_HTTP_VERSION_11);
3896     ngx_conf_merge_bitmask_value(conf->gzip_proxied, prev->gzip_proxied,
3897                               (NGX_CONF_BITMASK_SET|NGX_HTTP_GZIP_PROXIED_OFF));
3898 
3899 #if (NGX_PCRE)
3900     ngx_conf_merge_ptr_value(conf->gzip_disable, prev->gzip_disable, NULL);
3901 #endif
3902 
3903     if (conf->gzip_disable_msie6 == 3) {
3904         conf->gzip_disable_msie6 =
3905             (prev->gzip_disable_msie6 == 3) ? 0 : prev->gzip_disable_msie6;
3906     }
3907 
3908 #if (NGX_HTTP_DEGRADATION)
3909 
3910     if (conf->gzip_disable_degradation == 3) {
3911         conf->gzip_disable_degradation =
3912             (prev->gzip_disable_degradation == 3) ?
3913                  0 : prev->gzip_disable_degradation;
3914     }
3915 
3916 #endif
3917 #endif
3918 
3919 #if (NGX_HAVE_OPENAT)
3920     ngx_conf_merge_uint_value(conf->disable_symlinks, prev->disable_symlinks,
3921                               NGX_DISABLE_SYMLINKS_OFF);
3922     ngx_conf_merge_ptr_value(conf->disable_symlinks_from,
3923                              prev->disable_symlinks_from, NULL);
3924 #endif
3925 
3926     return NGX_CONF_OK;
3927 }
3928 
3929 
3930 static char *
3931 ngx_http_core_listen(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
3932 {
3933     ngx_http_core_srv_conf_t *cscf = conf;
3934 
3935     ngx_str_t              *value, size;
3936     ngx_url_t               u;
3937     ngx_uint_t              n;
3938     ngx_http_listen_opt_t   lsopt;
3939 
3940     cscf->listen = 1;
3941 
3942     value = cf->args->elts;
3943 
3944     ngx_memzero(&u, sizeof(ngx_url_t));
3945 
3946     u.url = value[1];
3947     u.listen = 1;
3948     u.default_port = 80;
3949 
3950     if (ngx_parse_url(cf->pool, &u) != NGX_OK) {
3951         if (u.err) {
3952             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
3953                                "%s in \"%V\" of the \"listen\" directive",
3954                                u.err, &u.url);
3955         }
3956 
3957         return NGX_CONF_ERROR;
3958     }
3959 
3960     ngx_memzero(&lsopt, sizeof(ngx_http_listen_opt_t));
3961 
3962     ngx_memcpy(&lsopt.sockaddr.sockaddr, &u.sockaddr, u.socklen);
3963 
3964     lsopt.socklen = u.socklen;
3965     lsopt.backlog = NGX_LISTEN_BACKLOG;
3966     lsopt.rcvbuf = -1;
3967     lsopt.sndbuf = -1;
3968 #if (NGX_HAVE_SETFIB)
3969     lsopt.setfib = -1;
3970 #endif
3971 #if (NGX_HAVE_TCP_FASTOPEN)
3972     lsopt.fastopen = -1;
3973 #endif
3974     lsopt.wildcard = u.wildcard;
3975 #if (NGX_HAVE_INET6)
3976     lsopt.ipv6only = 1;
3977 #endif
3978 
3979     (void) ngx_sock_ntop(&lsopt.sockaddr.sockaddr, lsopt.socklen, lsopt.addr,
3980                          NGX_SOCKADDR_STRLEN, 1);
3981 
3982     for (n = 2; n < cf->args->nelts; n++) {
3983 
3984         if (ngx_strcmp(value[n].data, "default_server") == 0
3985             || ngx_strcmp(value[n].data, "default") == 0)
3986         {
3987             lsopt.default_server = 1;
3988             continue;
3989         }
3990 
3991         if (ngx_strcmp(value[n].data, "bind") == 0) {
3992             lsopt.set = 1;
3993             lsopt.bind = 1;
3994             continue;
3995         }
3996 
3997 #if (NGX_HAVE_SETFIB)
3998         if (ngx_strncmp(value[n].data, "setfib=", 7) == 0) {
3999             lsopt.setfib = ngx_atoi(value[n].data + 7, value[n].len - 7);
4000             lsopt.set = 1;
4001             lsopt.bind = 1;
4002 
4003             if (lsopt.setfib == NGX_ERROR) {
4004                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4005                                    "invalid setfib \"%V\"", &value[n]);
4006                 return NGX_CONF_ERROR;
4007             }
4008 
4009             continue;
4010         }
4011 #endif
4012 
4013 #if (NGX_HAVE_TCP_FASTOPEN)
4014         if (ngx_strncmp(value[n].data, "fastopen=", 9) == 0) {
4015             lsopt.fastopen = ngx_atoi(value[n].data + 9, value[n].len - 9);
4016             lsopt.set = 1;
4017             lsopt.bind = 1;
4018 
4019             if (lsopt.fastopen == NGX_ERROR) {
4020                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4021                                    "invalid fastopen \"%V\"", &value[n]);
4022                 return NGX_CONF_ERROR;
4023             }
4024 
4025             continue;
4026         }
4027 #endif
4028 
4029         if (ngx_strncmp(value[n].data, "backlog=", 8) == 0) {
4030             lsopt.backlog = ngx_atoi(value[n].data + 8, value[n].len - 8);
4031             lsopt.set = 1;
4032             lsopt.bind = 1;
4033 
4034             if (lsopt.backlog == NGX_ERROR || lsopt.backlog == 0) {
4035                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4036                                    "invalid backlog \"%V\"", &value[n]);
4037                 return NGX_CONF_ERROR;
4038             }
4039 
4040             continue;
4041         }
4042 
4043         if (ngx_strncmp(value[n].data, "rcvbuf=", 7) == 0) {
4044             size.len = value[n].len - 7;
4045             size.data = value[n].data + 7;
4046 
4047             lsopt.rcvbuf = ngx_parse_size(&size);
4048             lsopt.set = 1;
4049             lsopt.bind = 1;
4050 
4051             if (lsopt.rcvbuf == NGX_ERROR) {
4052                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4053                                    "invalid rcvbuf \"%V\"", &value[n]);
4054                 return NGX_CONF_ERROR;
4055             }
4056 
4057             continue;
4058         }
4059 
4060         if (ngx_strncmp(value[n].data, "sndbuf=", 7) == 0) {
4061             size.len = value[n].len - 7;
4062             size.data = value[n].data + 7;
4063 
4064             lsopt.sndbuf = ngx_parse_size(&size);
4065             lsopt.set = 1;
4066             lsopt.bind = 1;
4067 
4068             if (lsopt.sndbuf == NGX_ERROR) {
4069                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4070                                    "invalid sndbuf \"%V\"", &value[n]);
4071                 return NGX_CONF_ERROR;
4072             }
4073 
4074             continue;
4075         }
4076 
4077         if (ngx_strncmp(value[n].data, "accept_filter=", 14) == 0) {
4078 #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
4079             lsopt.accept_filter = (char *) &value[n].data[14];
4080             lsopt.set = 1;
4081             lsopt.bind = 1;
4082 #else
4083             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4084                                "accept filters \"%V\" are not supported "
4085                                "on this platform, ignored",
4086                                &value[n]);
4087 #endif
4088             continue;
4089         }
4090 
4091         if (ngx_strcmp(value[n].data, "deferred") == 0) {
4092 #if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
4093             lsopt.deferred_accept = 1;
4094             lsopt.set = 1;
4095             lsopt.bind = 1;
4096 #else
4097             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4098                                "the deferred accept is not supported "
4099                                "on this platform, ignored");
4100 #endif
4101             continue;
4102         }
4103 
4104         if (ngx_strncmp(value[n].data, "ipv6only=o", 10) == 0) {
4105 #if (NGX_HAVE_INET6 && defined IPV6_V6ONLY)
4106             struct sockaddr  *sa;
4107 
4108             sa = &lsopt.sockaddr.sockaddr;
4109 
4110             if (sa->sa_family == AF_INET6) {
4111 
4112                 if (ngx_strcmp(&value[n].data[10], "n") == 0) {
4113                     lsopt.ipv6only = 1;
4114 
4115                 } else if (ngx_strcmp(&value[n].data[10], "ff") == 0) {
4116                     lsopt.ipv6only = 0;
4117 
4118                 } else {
4119                     ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4120                                        "invalid ipv6only flags \"%s\"",
4121                                        &value[n].data[9]);
4122                     return NGX_CONF_ERROR;
4123                 }
4124 
4125                 lsopt.set = 1;
4126                 lsopt.bind = 1;
4127 
4128             } else {
4129                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4130                                    "ipv6only is not supported "
4131                                    "on addr \"%s\", ignored", lsopt.addr);
4132             }
4133 
4134             continue;
4135 #else
4136             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4137                                "ipv6only is not supported "
4138                                "on this platform");
4139             return NGX_CONF_ERROR;
4140 #endif
4141         }
4142 
4143         if (ngx_strcmp(value[n].data, "reuseport") == 0) {
4144 #if (NGX_HAVE_REUSEPORT)
4145             lsopt.reuseport = 1;
4146             lsopt.set = 1;
4147             lsopt.bind = 1;
4148 #else
4149             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4150                                "reuseport is not supported "
4151                                "on this platform, ignored");
4152 #endif
4153             continue;
4154         }
4155 
4156         if (ngx_strcmp(value[n].data, "ssl") == 0) {
4157 #if (NGX_HTTP_SSL)
4158             lsopt.ssl = 1;
4159             continue;
4160 #else
4161             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4162                                "the \"ssl\" parameter requires "
4163                                "ngx_http_ssl_module");
4164             return NGX_CONF_ERROR;
4165 #endif
4166         }
4167 
4168         if (ngx_strcmp(value[n].data, "http2") == 0) {
4169 #if (NGX_HTTP_V2)
4170             lsopt.http2 = 1;
4171             continue;
4172 #else
4173             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4174                                "the \"http2\" parameter requires "
4175                                "ngx_http_v2_module");
4176             return NGX_CONF_ERROR;
4177 #endif
4178         }
4179 
4180         if (ngx_strcmp(value[n].data, "spdy") == 0) {
4181             ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
4182                                "invalid parameter \"spdy\": "
4183                                "ngx_http_spdy_module was superseded "
4184                                "by ngx_http_v2_module");
4185             continue;
4186         }
4187 
4188         if (ngx_strncmp(value[n].data, "so_keepalive=", 13) == 0) {
4189 
4190             if (ngx_strcmp(&value[n].data[13], "on") == 0) {
4191                 lsopt.so_keepalive = 1;
4192 
4193             } else if (ngx_strcmp(&value[n].data[13], "off") == 0) {
4194                 lsopt.so_keepalive = 2;
4195 
4196             } else {
4197 
4198 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
4199                 u_char     *p, *end;
4200                 ngx_str_t   s;
4201 
4202                 end = value[n].data + value[n].len;
4203                 s.data = value[n].data + 13;
4204 
4205                 p = ngx_strlchr(s.data, end, ':');
4206                 if (p == NULL) {
4207                     p = end;
4208                 }
4209 
4210                 if (p > s.data) {
4211                     s.len = p - s.data;
4212 
4213                     lsopt.tcp_keepidle = ngx_parse_time(&s, 1);
4214                     if (lsopt.tcp_keepidle == (time_t) NGX_ERROR) {
4215                         goto invalid_so_keepalive;
4216                     }
4217                 }
4218 
4219                 s.data = (p < end) ? (p + 1) : end;
4220 
4221                 p = ngx_strlchr(s.data, end, ':');
4222                 if (p == NULL) {
4223                     p = end;
4224                 }
4225 
4226                 if (p > s.data) {
4227                     s.len = p - s.data;
4228 
4229                     lsopt.tcp_keepintvl = ngx_parse_time(&s, 1);
4230                     if (lsopt.tcp_keepintvl == (time_t) NGX_ERROR) {
4231                         goto invalid_so_keepalive;
4232                     }
4233                 }
4234 
4235                 s.data = (p < end) ? (p + 1) : end;
4236 
4237                 if (s.data < end) {
4238                     s.len = end - s.data;
4239 
4240                     lsopt.tcp_keepcnt = ngx_atoi(s.data, s.len);
4241                     if (lsopt.tcp_keepcnt == NGX_ERROR) {
4242                         goto invalid_so_keepalive;
4243                     }
4244                 }
4245 
4246                 if (lsopt.tcp_keepidle == 0 && lsopt.tcp_keepintvl == 0
4247                     && lsopt.tcp_keepcnt == 0)
4248                 {
4249                     goto invalid_so_keepalive;
4250                 }
4251 
4252                 lsopt.so_keepalive = 1;
4253 
4254 #else
4255 
4256                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4257                                    "the \"so_keepalive\" parameter accepts "
4258                                    "only \"on\" or \"off\" on this platform");
4259                 return NGX_CONF_ERROR;
4260 
4261 #endif
4262             }
4263 
4264             lsopt.set = 1;
4265             lsopt.bind = 1;
4266 
4267             continue;
4268 
4269 #if (NGX_HAVE_KEEPALIVE_TUNABLE)
4270         invalid_so_keepalive:
4271 
4272             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4273                                "invalid so_keepalive value: \"%s\"",
4274                                &value[n].data[13]);
4275             return NGX_CONF_ERROR;
4276 #endif
4277         }
4278 
4279         if (ngx_strcmp(value[n].data, "proxy_protocol") == 0) {
4280             lsopt.proxy_protocol = 1;
4281             continue;
4282         }
4283 
4284         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4285                            "invalid parameter \"%V\"", &value[n]);
4286         return NGX_CONF_ERROR;
4287     }
4288 
4289     if (ngx_http_add_listen(cf, cscf, &lsopt) == NGX_OK) {
4290         return NGX_CONF_OK;
4291     }
4292 
4293     return NGX_CONF_ERROR;
4294 }
4295 
4296 
4297 static char *
4298 ngx_http_core_server_name(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4299 {
4300     ngx_http_core_srv_conf_t *cscf = conf;
4301 
4302     u_char                   ch;
4303     ngx_str_t               *value;
4304     ngx_uint_t               i;
4305     ngx_http_server_name_t  *sn;
4306 
4307     value = cf->args->elts;
4308 
4309     for (i = 1; i < cf->args->nelts; i++) {
4310 
4311         ch = value[i].data[0];
4312 
4313         if ((ch == '*' && (value[i].len < 3 || value[i].data[1] != '.'))
4314             || (ch == '.' && value[i].len < 2))
4315         {
4316             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4317                                "server name \"%V\" is invalid", &value[i]);
4318             return NGX_CONF_ERROR;
4319         }
4320 
4321         if (ngx_strchr(value[i].data, '/')) {
4322             ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
4323                                "server name \"%V\" has suspicious symbols",
4324                                &value[i]);
4325         }
4326 
4327         sn = ngx_array_push(&cscf->server_names);
4328         if (sn == NULL) {
4329             return NGX_CONF_ERROR;
4330         }
4331 
4332 #if (NGX_PCRE)
4333         sn->regex = NULL;
4334 #endif
4335         sn->server = cscf;
4336 
4337         if (ngx_strcasecmp(value[i].data, (u_char *) "$hostname") == 0) {
4338             sn->name = cf->cycle->hostname;
4339 
4340         } else {
4341             sn->name = value[i];
4342         }
4343 
4344         if (value[i].data[0] != '~') {
4345             ngx_strlow(sn->name.data, sn->name.data, sn->name.len);
4346             continue;
4347         }
4348 
4349 #if (NGX_PCRE)
4350         {
4351         u_char               *p;
4352         ngx_regex_compile_t   rc;
4353         u_char                errstr[NGX_MAX_CONF_ERRSTR];
4354 
4355         if (value[i].len == 1) {
4356             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4357                                "empty regex in server name \"%V\"", &value[i]);
4358             return NGX_CONF_ERROR;
4359         }
4360 
4361         value[i].len--;
4362         value[i].data++;
4363 
4364         ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
4365 
4366         rc.pattern = value[i];
4367         rc.err.len = NGX_MAX_CONF_ERRSTR;
4368         rc.err.data = errstr;
4369 
4370         for (p = value[i].data; p < value[i].data + value[i].len; p++) {
4371             if (*p >= 'A' && *p <= 'Z') {
4372                 rc.options = NGX_REGEX_CASELESS;
4373                 break;
4374             }
4375         }
4376 
4377         sn->regex = ngx_http_regex_compile(cf, &rc);
4378         if (sn->regex == NULL) {
4379             return NGX_CONF_ERROR;
4380         }
4381 
4382         sn->name = value[i];
4383         cscf->captures = (rc.captures > 0);
4384         }
4385 #else
4386         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4387                            "using regex \"%V\" "
4388                            "requires PCRE library", &value[i]);
4389 
4390         return NGX_CONF_ERROR;
4391 #endif
4392     }
4393 
4394     return NGX_CONF_OK;
4395 }
4396 
4397 
4398 static char *
4399 ngx_http_core_root(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4400 {
4401     ngx_http_core_loc_conf_t *clcf = conf;
4402 
4403     ngx_str_t                  *value;
4404     ngx_int_t                   alias;
4405     ngx_uint_t                  n;
4406     ngx_http_script_compile_t   sc;
4407 
4408     alias = (cmd->name.len == sizeof("alias") - 1) ? 1 : 0;
4409 
4410     if (clcf->root.data) {
4411 
4412         if ((clcf->alias != 0) == alias) {
4413             return "is duplicate";
4414         }
4415 
4416         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4417                            "\"%V\" directive is duplicate, "
4418                            "\"%s\" directive was specified earlier",
4419                            &cmd->name, clcf->alias ? "alias" : "root");
4420 
4421         return NGX_CONF_ERROR;
4422     }
4423 
4424     if (clcf->named && alias) {
4425         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4426                            "the \"alias\" directive cannot be used "
4427                            "inside the named location");
4428 
4429         return NGX_CONF_ERROR;
4430     }
4431 
4432     value = cf->args->elts;
4433 
4434     if (ngx_strstr(value[1].data, "$document_root")
4435         || ngx_strstr(value[1].data, "${document_root}"))
4436     {
4437         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4438                            "the $document_root variable cannot be used "
4439                            "in the \"%V\" directive",
4440                            &cmd->name);
4441 
4442         return NGX_CONF_ERROR;
4443     }
4444 
4445     if (ngx_strstr(value[1].data, "$realpath_root")
4446         || ngx_strstr(value[1].data, "${realpath_root}"))
4447     {
4448         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4449                            "the $realpath_root variable cannot be used "
4450                            "in the \"%V\" directive",
4451                            &cmd->name);
4452 
4453         return NGX_CONF_ERROR;
4454     }
4455 
4456     clcf->alias = alias ? clcf->name.len : 0;
4457     clcf->root = value[1];
4458 
4459     if (!alias && clcf->root.len > 0
4460         && clcf->root.data[clcf->root.len - 1] == '/')
4461     {
4462         clcf->root.len--;
4463     }
4464 
4465     if (clcf->root.data[0] != '$') {
4466         if (ngx_conf_full_name(cf->cycle, &clcf->root, 0) != NGX_OK) {
4467             return NGX_CONF_ERROR;
4468         }
4469     }
4470 
4471     n = ngx_http_script_variables_count(&clcf->root);
4472 
4473     ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
4474     sc.variables = n;
4475 
4476 #if (NGX_PCRE)
4477     if (alias && clcf->regex) {
4478         clcf->alias = NGX_MAX_SIZE_T_VALUE;
4479         n = 1;
4480     }
4481 #endif
4482 
4483     if (n) {
4484         sc.cf = cf;
4485         sc.source = &clcf->root;
4486         sc.lengths = &clcf->root_lengths;
4487         sc.values = &clcf->root_values;
4488         sc.complete_lengths = 1;
4489         sc.complete_values = 1;
4490 
4491         if (ngx_http_script_compile(&sc) != NGX_OK) {
4492             return NGX_CONF_ERROR;
4493         }
4494     }
4495 
4496     return NGX_CONF_OK;
4497 }
4498 
4499 
4500 static ngx_http_method_name_t  ngx_methods_names[] = {
4501     { (u_char *) "GET",       (uint32_t) ~NGX_HTTP_GET },
4502     { (u_char *) "HEAD",      (uint32_t) ~NGX_HTTP_HEAD },
4503     { (u_char *) "POST",      (uint32_t) ~NGX_HTTP_POST },
4504     { (u_char *) "PUT",       (uint32_t) ~NGX_HTTP_PUT },
4505     { (u_char *) "DELETE",    (uint32_t) ~NGX_HTTP_DELETE },
4506     { (u_char *) "MKCOL",     (uint32_t) ~NGX_HTTP_MKCOL },
4507     { (u_char *) "COPY",      (uint32_t) ~NGX_HTTP_COPY },
4508     { (u_char *) "MOVE",      (uint32_t) ~NGX_HTTP_MOVE },
4509     { (u_char *) "OPTIONS",   (uint32_t) ~NGX_HTTP_OPTIONS },
4510     { (u_char *) "PROPFIND",  (uint32_t) ~NGX_HTTP_PROPFIND },
4511     { (u_char *) "PROPPATCH", (uint32_t) ~NGX_HTTP_PROPPATCH },
4512     { (u_char *) "LOCK",      (uint32_t) ~NGX_HTTP_LOCK },
4513     { (u_char *) "UNLOCK",    (uint32_t) ~NGX_HTTP_UNLOCK },
4514     { (u_char *) "PATCH",     (uint32_t) ~NGX_HTTP_PATCH },
4515     { NULL, 0 }
4516 };
4517 
4518 
4519 static char *
4520 ngx_http_core_limit_except(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4521 {
4522     ngx_http_core_loc_conf_t *pclcf = conf;
4523 
4524     char                      *rv;
4525     void                      *mconf;
4526     ngx_str_t                 *value;
4527     ngx_uint_t                 i;
4528     ngx_conf_t                 save;
4529     ngx_http_module_t         *module;
4530     ngx_http_conf_ctx_t       *ctx, *pctx;
4531     ngx_http_method_name_t    *name;
4532     ngx_http_core_loc_conf_t  *clcf;
4533 
4534     if (pclcf->limit_except) {
4535         return "is duplicate";
4536     }
4537 
4538     pclcf->limit_except = 0xffffffff;
4539 
4540     value = cf->args->elts;
4541 
4542     for (i = 1; i < cf->args->nelts; i++) {
4543         for (name = ngx_methods_names; name->name; name++) {
4544 
4545             if (ngx_strcasecmp(value[i].data, name->name) == 0) {
4546                 pclcf->limit_except &= name->method;
4547                 goto next;
4548             }
4549         }
4550 
4551         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4552                            "invalid method \"%V\"", &value[i]);
4553         return NGX_CONF_ERROR;
4554 
4555     next:
4556         continue;
4557     }
4558 
4559     if (!(pclcf->limit_except & NGX_HTTP_GET)) {
4560         pclcf->limit_except &= (uint32_t) ~NGX_HTTP_HEAD;
4561     }
4562 
4563     ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
4564     if (ctx == NULL) {
4565         return NGX_CONF_ERROR;
4566     }
4567 
4568     pctx = cf->ctx;
4569     ctx->main_conf = pctx->main_conf;
4570     ctx->srv_conf = pctx->srv_conf;
4571 
4572     ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
4573     if (ctx->loc_conf == NULL) {
4574         return NGX_CONF_ERROR;
4575     }
4576 
4577     for (i = 0; cf->cycle->modules[i]; i++) {
4578         if (cf->cycle->modules[i]->type != NGX_HTTP_MODULE) {
4579             continue;
4580         }
4581 
4582         module = cf->cycle->modules[i]->ctx;
4583 
4584         if (module->create_loc_conf) {
4585 
4586             mconf = module->create_loc_conf(cf);
4587             if (mconf == NULL) {
4588                 return NGX_CONF_ERROR;
4589             }
4590 
4591             ctx->loc_conf[cf->cycle->modules[i]->ctx_index] = mconf;
4592         }
4593     }
4594 
4595 
4596     clcf = ctx->loc_conf[ngx_http_core_module.ctx_index];
4597     pclcf->limit_except_loc_conf = ctx->loc_conf;
4598     clcf->loc_conf = ctx->loc_conf;
4599     clcf->name = pclcf->name;
4600     clcf->noname = 1;
4601     clcf->lmt_excpt = 1;
4602 
4603     if (ngx_http_add_location(cf, &pclcf->locations, clcf) != NGX_OK) {
4604         return NGX_CONF_ERROR;
4605     }
4606 
4607     save = *cf;
4608     cf->ctx = ctx;
4609     cf->cmd_type = NGX_HTTP_LMT_CONF;
4610 
4611     rv = ngx_conf_parse(cf, NULL);
4612 
4613     *cf = save;
4614 
4615     return rv;
4616 }
4617 
4618 
4619 static char *
4620 ngx_http_core_set_aio(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4621 {
4622     ngx_http_core_loc_conf_t *clcf = conf;
4623 
4624     ngx_str_t  *value;
4625 
4626     if (clcf->aio != NGX_CONF_UNSET) {
4627         return "is duplicate";
4628     }
4629 
4630 #if (NGX_THREADS)
4631     clcf->thread_pool = NULL;
4632     clcf->thread_pool_value = NULL;
4633 #endif
4634 
4635     value = cf->args->elts;
4636 
4637     if (ngx_strcmp(value[1].data, "off") == 0) {
4638         clcf->aio = NGX_HTTP_AIO_OFF;
4639         return NGX_CONF_OK;
4640     }
4641 
4642     if (ngx_strcmp(value[1].data, "on") == 0) {
4643 #if (NGX_HAVE_FILE_AIO)
4644         clcf->aio = NGX_HTTP_AIO_ON;
4645         return NGX_CONF_OK;
4646 #else
4647         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4648                            "\"aio on\" "
4649                            "is unsupported on this platform");
4650         return NGX_CONF_ERROR;
4651 #endif
4652     }
4653 
4654 #if (NGX_HAVE_AIO_SENDFILE)
4655 
4656     if (ngx_strcmp(value[1].data, "sendfile") == 0) {
4657         clcf->aio = NGX_HTTP_AIO_ON;
4658 
4659         ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
4660                            "the \"sendfile\" parameter of "
4661                            "the \"aio\" directive is deprecated");
4662         return NGX_CONF_OK;
4663     }
4664 
4665 #endif
4666 
4667     if (ngx_strncmp(value[1].data, "threads", 7) == 0
4668         && (value[1].len == 7 || value[1].data[7] == '='))
4669     {
4670 #if (NGX_THREADS)
4671         ngx_str_t                          name;
4672         ngx_thread_pool_t                 *tp;
4673         ngx_http_complex_value_t           cv;
4674         ngx_http_compile_complex_value_t   ccv;
4675 
4676         clcf->aio = NGX_HTTP_AIO_THREADS;
4677 
4678         if (value[1].len >= 8) {
4679             name.len = value[1].len - 8;
4680             name.data = value[1].data + 8;
4681 
4682             ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
4683 
4684             ccv.cf = cf;
4685             ccv.value = &name;
4686             ccv.complex_value = &cv;
4687 
4688             if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
4689                 return NGX_CONF_ERROR;
4690             }
4691 
4692             if (cv.lengths != NULL) {
4693                 clcf->thread_pool_value = ngx_palloc(cf->pool,
4694                                     sizeof(ngx_http_complex_value_t));
4695                 if (clcf->thread_pool_value == NULL) {
4696                     return NGX_CONF_ERROR;
4697                 }
4698 
4699                 *clcf->thread_pool_value = cv;
4700 
4701                 return NGX_CONF_OK;
4702             }
4703 
4704             tp = ngx_thread_pool_add(cf, &name);
4705 
4706         } else {
4707             tp = ngx_thread_pool_add(cf, NULL);
4708         }
4709 
4710         if (tp == NULL) {
4711             return NGX_CONF_ERROR;
4712         }
4713 
4714         clcf->thread_pool = tp;
4715 
4716         return NGX_CONF_OK;
4717 #else
4718         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4719                            "\"aio threads\" "
4720                            "is unsupported on this platform");
4721         return NGX_CONF_ERROR;
4722 #endif
4723     }
4724 
4725     return "invalid value";
4726 }
4727 
4728 
4729 static char *
4730 ngx_http_core_directio(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4731 {
4732     ngx_http_core_loc_conf_t *clcf = conf;
4733 
4734     ngx_str_t  *value;
4735 
4736     if (clcf->directio != NGX_CONF_UNSET) {
4737         return "is duplicate";
4738     }
4739 
4740     value = cf->args->elts;
4741 
4742     if (ngx_strcmp(value[1].data, "off") == 0) {
4743         clcf->directio = NGX_OPEN_FILE_DIRECTIO_OFF;
4744         return NGX_CONF_OK;
4745     }
4746 
4747     clcf->directio = ngx_parse_offset(&value[1]);
4748     if (clcf->directio == (off_t) NGX_ERROR) {
4749         return "invalid value";
4750     }
4751 
4752     return NGX_CONF_OK;
4753 }
4754 
4755 
4756 static char *
4757 ngx_http_core_error_page(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4758 {
4759     ngx_http_core_loc_conf_t *clcf = conf;
4760 
4761     u_char                            *p;
4762     ngx_int_t                          overwrite;
4763     ngx_str_t                         *value, uri, args;
4764     ngx_uint_t                         i, n;
4765     ngx_http_err_page_t               *err;
4766     ngx_http_complex_value_t           cv;
4767     ngx_http_compile_complex_value_t   ccv;
4768 
4769     if (clcf->error_pages == NULL) {
4770         clcf->error_pages = ngx_array_create(cf->pool, 4,
4771                                              sizeof(ngx_http_err_page_t));
4772         if (clcf->error_pages == NULL) {
4773             return NGX_CONF_ERROR;
4774         }
4775     }
4776 
4777     value = cf->args->elts;
4778 
4779     i = cf->args->nelts - 2;
4780 
4781     if (value[i].data[0] == '=') {
4782         if (i == 1) {
4783             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4784                                "invalid value \"%V\"", &value[i]);
4785             return NGX_CONF_ERROR;
4786         }
4787 
4788         if (value[i].len > 1) {
4789             overwrite = ngx_atoi(&value[i].data[1], value[i].len - 1);
4790 
4791             if (overwrite == NGX_ERROR) {
4792                 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4793                                    "invalid value \"%V\"", &value[i]);
4794                 return NGX_CONF_ERROR;
4795             }
4796 
4797         } else {
4798             overwrite = 0;
4799         }
4800 
4801         n = 2;
4802 
4803     } else {
4804         overwrite = -1;
4805         n = 1;
4806     }
4807 
4808     uri = value[cf->args->nelts - 1];
4809 
4810     ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
4811 
4812     ccv.cf = cf;
4813     ccv.value = &uri;
4814     ccv.complex_value = &cv;
4815 
4816     if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
4817         return NGX_CONF_ERROR;
4818     }
4819 
4820     ngx_str_null(&args);
4821 
4822     if (cv.lengths == NULL && uri.len && uri.data[0] == '/') {
4823         p = (u_char *) ngx_strchr(uri.data, '?');
4824 
4825         if (p) {
4826             cv.value.len = p - uri.data;
4827             cv.value.data = uri.data;
4828             p++;
4829             args.len = (uri.data + uri.len) - p;
4830             args.data = p;
4831         }
4832     }
4833 
4834     for (i = 1; i < cf->args->nelts - n; i++) {
4835         err = ngx_array_push(clcf->error_pages);
4836         if (err == NULL) {
4837             return NGX_CONF_ERROR;
4838         }
4839 
4840         err->status = ngx_atoi(value[i].data, value[i].len);
4841 
4842         if (err->status == NGX_ERROR || err->status == 499) {
4843             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4844                                "invalid value \"%V\"", &value[i]);
4845             return NGX_CONF_ERROR;
4846         }
4847 
4848         if (err->status < 300 || err->status > 599) {
4849             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4850                                "value \"%V\" must be between 300 and 599",
4851                                &value[i]);
4852             return NGX_CONF_ERROR;
4853         }
4854 
4855         err->overwrite = overwrite;
4856 
4857         if (overwrite == -1) {
4858             switch (err->status) {
4859                 case NGX_HTTP_TO_HTTPS:
4860                 case NGX_HTTPS_CERT_ERROR:
4861                 case NGX_HTTPS_NO_CERT:
4862                     err->overwrite = NGX_HTTP_BAD_REQUEST;
4863             }
4864         }
4865 
4866         err->value = cv;
4867         err->args = args;
4868     }
4869 
4870     return NGX_CONF_OK;
4871 }
4872 
4873 
4874 static char *
4875 ngx_http_core_try_files(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4876 {
4877     ngx_http_core_loc_conf_t *clcf = conf;
4878 
4879     ngx_str_t                  *value;
4880     ngx_int_t                   code;
4881     ngx_uint_t                  i, n;
4882     ngx_http_try_file_t        *tf;
4883     ngx_http_script_compile_t   sc;
4884     ngx_http_core_main_conf_t  *cmcf;
4885 
4886     if (clcf->try_files) {
4887         return "is duplicate";
4888     }
4889 
4890     cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
4891 
4892     cmcf->try_files = 1;
4893 
4894     tf = ngx_pcalloc(cf->pool, cf->args->nelts * sizeof(ngx_http_try_file_t));
4895     if (tf == NULL) {
4896         return NGX_CONF_ERROR;
4897     }
4898 
4899     clcf->try_files = tf;
4900 
4901     value = cf->args->elts;
4902 
4903     for (i = 0; i < cf->args->nelts - 1; i++) {
4904 
4905         tf[i].name = value[i + 1];
4906 
4907         if (tf[i].name.len > 0
4908             && tf[i].name.data[tf[i].name.len - 1] == '/'
4909             && i + 2 < cf->args->nelts)
4910         {
4911             tf[i].test_dir = 1;
4912             tf[i].name.len--;
4913             tf[i].name.data[tf[i].name.len] = '\0';
4914         }
4915 
4916         n = ngx_http_script_variables_count(&tf[i].name);
4917 
4918         if (n) {
4919             ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
4920 
4921             sc.cf = cf;
4922             sc.source = &tf[i].name;
4923             sc.lengths = &tf[i].lengths;
4924             sc.values = &tf[i].values;
4925             sc.variables = n;
4926             sc.complete_lengths = 1;
4927             sc.complete_values = 1;
4928 
4929             if (ngx_http_script_compile(&sc) != NGX_OK) {
4930                 return NGX_CONF_ERROR;
4931             }
4932 
4933         } else {
4934             /* add trailing '\0' to length */
4935             tf[i].name.len++;
4936         }
4937     }
4938 
4939     if (tf[i - 1].name.data[0] == '=') {
4940 
4941         code = ngx_atoi(tf[i - 1].name.data + 1, tf[i - 1].name.len - 2);
4942 
4943         if (code == NGX_ERROR || code > 999) {
4944             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
4945                                "invalid code \"%*s\"",
4946                                tf[i - 1].name.len - 1, tf[i - 1].name.data);
4947             return NGX_CONF_ERROR;
4948         }
4949 
4950         tf[i].code = code;
4951     }
4952 
4953     return NGX_CONF_OK;
4954 }
4955 
4956 
4957 static char *
4958 ngx_http_core_open_file_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
4959 {
4960     ngx_http_core_loc_conf_t *clcf = conf;
4961 
4962     time_t       inactive;
4963     ngx_str_t   *value, s;
4964     ngx_int_t    max;
4965     ngx_uint_t   i;
4966 
4967     if (clcf->open_file_cache != NGX_CONF_UNSET_PTR) {
4968         return "is duplicate";
4969     }
4970 
4971     value = cf->args->elts;
4972 
4973     max = 0;
4974     inactive = 60;
4975 
4976     for (i = 1; i < cf->args->nelts; i++) {
4977 
4978         if (ngx_strncmp(value[i].data, "max=", 4) == 0) {
4979 
4980             max = ngx_atoi(value[i].data + 4, value[i].len - 4);
4981             if (max <= 0) {
4982                 goto failed;
4983             }
4984 
4985             continue;
4986         }
4987 
4988         if (ngx_strncmp(value[i].data, "inactive=", 9) == 0) {
4989 
4990             s.len = value[i].len - 9;
4991             s.data = value[i].data + 9;
4992 
4993             inactive = ngx_parse_time(&s, 1);
4994             if (inactive == (time_t) NGX_ERROR) {
4995                 goto failed;
4996             }
4997 
4998             continue;
4999         }
5000 
5001         if (ngx_strcmp(value[i].data, "off") == 0) {
5002 
5003             clcf->open_file_cache = NULL;
5004 
5005             continue;
5006         }
5007 
5008     failed:
5009 
5010         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5011                            "invalid \"open_file_cache\" parameter \"%V\"",
5012                            &value[i]);
5013         return NGX_CONF_ERROR;
5014     }
5015 
5016     if (clcf->open_file_cache == NULL) {
5017         return NGX_CONF_OK;
5018     }
5019 
5020     if (max == 0) {
5021         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5022                         "\"open_file_cache\" must have the \"max\" parameter");
5023         return NGX_CONF_ERROR;
5024     }
5025 
5026     clcf->open_file_cache = ngx_open_file_cache_init(cf->pool, max, inactive);
5027     if (clcf->open_file_cache) {
5028         return NGX_CONF_OK;
5029     }
5030 
5031     return NGX_CONF_ERROR;
5032 }
5033 
5034 
5035 static char *
5036 ngx_http_core_error_log(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
5037 {
5038     ngx_http_core_loc_conf_t *clcf = conf;
5039 
5040     return ngx_log_set_log(cf, &clcf->error_log);
5041 }
5042 
5043 
5044 static char *
5045 ngx_http_core_keepalive(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
5046 {
5047     ngx_http_core_loc_conf_t *clcf = conf;
5048 
5049     ngx_str_t  *value;
5050 
5051     if (clcf->keepalive_timeout != NGX_CONF_UNSET_MSEC) {
5052         return "is duplicate";
5053     }
5054 
5055     value = cf->args->elts;
5056 
5057     clcf->keepalive_timeout = ngx_parse_time(&value[1], 0);
5058 
5059     if (clcf->keepalive_timeout == (ngx_msec_t) NGX_ERROR) {
5060         return "invalid value";
5061     }
5062 
5063     if (cf->args->nelts == 2) {
5064         return NGX_CONF_OK;
5065     }
5066 
5067     clcf->keepalive_header = ngx_parse_time(&value[2], 1);
5068 
5069     if (clcf->keepalive_header == (time_t) NGX_ERROR) {
5070         return "invalid value";
5071     }
5072 
5073     return NGX_CONF_OK;
5074 }
5075 
5076 
5077 static char *
5078 ngx_http_core_internal(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
5079 {
5080     ngx_http_core_loc_conf_t *clcf = conf;
5081 
5082     if (clcf->internal != NGX_CONF_UNSET) {
5083         return "is duplicate";
5084     }
5085 
5086     clcf->internal = 1;
5087 
5088     return NGX_CONF_OK;
5089 }
5090 
5091 
5092 static char *
5093 ngx_http_core_resolver(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
5094 {
5095     ngx_http_core_loc_conf_t  *clcf = conf;
5096 
5097     ngx_str_t  *value;
5098 
5099     if (clcf->resolver) {
5100         return "is duplicate";
5101     }
5102 
5103     value = cf->args->elts;
5104 
5105     clcf->resolver = ngx_resolver_create(cf, &value[1], cf->args->nelts - 1);
5106     if (clcf->resolver == NULL) {
5107         return NGX_CONF_ERROR;
5108     }
5109 
5110     return NGX_CONF_OK;
5111 }
5112 
5113 
5114 #if (NGX_HTTP_GZIP)
5115 
5116 static char *
5117 ngx_http_gzip_disable(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
5118 {
5119     ngx_http_core_loc_conf_t  *clcf = conf;
5120 
5121 #if (NGX_PCRE)
5122 
5123     ngx_str_t            *value;
5124     ngx_uint_t            i;
5125     ngx_regex_elt_t      *re;
5126     ngx_regex_compile_t   rc;
5127     u_char                errstr[NGX_MAX_CONF_ERRSTR];
5128 
5129     if (clcf->gzip_disable == NGX_CONF_UNSET_PTR) {
5130         clcf->gzip_disable = ngx_array_create(cf->pool, 2,
5131                                               sizeof(ngx_regex_elt_t));
5132         if (clcf->gzip_disable == NULL) {
5133             return NGX_CONF_ERROR;
5134         }
5135     }
5136 
5137     value = cf->args->elts;
5138 
5139     ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
5140 
5141     rc.pool = cf->pool;
5142     rc.err.len = NGX_MAX_CONF_ERRSTR;
5143     rc.err.data = errstr;
5144 
5145     for (i = 1; i < cf->args->nelts; i++) {
5146 
5147         if (ngx_strcmp(value[i].data, "msie6") == 0) {
5148             clcf->gzip_disable_msie6 = 1;
5149             continue;
5150         }
5151 
5152 #if (NGX_HTTP_DEGRADATION)
5153 
5154         if (ngx_strcmp(value[i].data, "degradation") == 0) {
5155             clcf->gzip_disable_degradation = 1;
5156             continue;
5157         }
5158 
5159 #endif
5160 
5161         re = ngx_array_push(clcf->gzip_disable);
5162         if (re == NULL) {
5163             return NGX_CONF_ERROR;
5164         }
5165 
5166         rc.pattern = value[i];
5167         rc.options = NGX_REGEX_CASELESS;
5168 
5169         if (ngx_regex_compile(&rc) != NGX_OK) {
5170             ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%V", &rc.err);
5171             return NGX_CONF_ERROR;
5172         }
5173 
5174         re->regex = rc.regex;
5175         re->name = value[i].data;
5176     }
5177 
5178     return NGX_CONF_OK;
5179 
5180 #else
5181     ngx_str_t   *value;
5182     ngx_uint_t   i;
5183 
5184     value = cf->args->elts;
5185 
5186     for (i = 1; i < cf->args->nelts; i++) {
5187         if (ngx_strcmp(value[i].data, "msie6") == 0) {
5188             clcf->gzip_disable_msie6 = 1;
5189             continue;
5190         }
5191 
5192 #if (NGX_HTTP_DEGRADATION)
5193 
5194         if (ngx_strcmp(value[i].data, "degradation") == 0) {
5195             clcf->gzip_disable_degradation = 1;
5196             continue;
5197         }
5198 
5199 #endif
5200 
5201         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5202                            "without PCRE library \"gzip_disable\" supports "
5203                            "builtin \"msie6\" and \"degradation\" mask only");
5204 
5205         return NGX_CONF_ERROR;
5206     }
5207 
5208     return NGX_CONF_OK;
5209 
5210 #endif
5211 }
5212 
5213 #endif
5214 
5215 
5216 #if (NGX_HAVE_OPENAT)
5217 
5218 static char *
5219 ngx_http_disable_symlinks(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
5220 {
5221     ngx_http_core_loc_conf_t *clcf = conf;
5222 
5223     ngx_str_t                         *value;
5224     ngx_uint_t                         i;
5225     ngx_http_compile_complex_value_t   ccv;
5226 
5227     if (clcf->disable_symlinks != NGX_CONF_UNSET_UINT) {
5228         return "is duplicate";
5229     }
5230 
5231     value = cf->args->elts;
5232 
5233     for (i = 1; i < cf->args->nelts; i++) {
5234 
5235         if (ngx_strcmp(value[i].data, "off") == 0) {
5236             clcf->disable_symlinks = NGX_DISABLE_SYMLINKS_OFF;
5237             continue;
5238         }
5239 
5240         if (ngx_strcmp(value[i].data, "if_not_owner") == 0) {
5241             clcf->disable_symlinks = NGX_DISABLE_SYMLINKS_NOTOWNER;
5242             continue;
5243         }
5244 
5245         if (ngx_strcmp(value[i].data, "on") == 0) {
5246             clcf->disable_symlinks = NGX_DISABLE_SYMLINKS_ON;
5247             continue;
5248         }
5249 
5250         if (ngx_strncmp(value[i].data, "from=", 5) == 0) {
5251             value[i].len -= 5;
5252             value[i].data += 5;
5253 
5254             ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
5255 
5256             ccv.cf = cf;
5257             ccv.value = &value[i];
5258             ccv.complex_value = ngx_palloc(cf->pool,
5259                                            sizeof(ngx_http_complex_value_t));
5260             if (ccv.complex_value == NULL) {
5261                 return NGX_CONF_ERROR;
5262             }
5263 
5264             if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
5265                 return NGX_CONF_ERROR;
5266             }
5267 
5268             clcf->disable_symlinks_from = ccv.complex_value;
5269 
5270             continue;
5271         }
5272 
5273         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5274                            "invalid parameter \"%V\"", &value[i]);
5275         return NGX_CONF_ERROR;
5276     }
5277 
5278     if (clcf->disable_symlinks == NGX_CONF_UNSET_UINT) {
5279         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5280                            "\"%V\" must have \"off\", \"on\" "
5281                            "or \"if_not_owner\" parameter",
5282                            &cmd->name);
5283         return NGX_CONF_ERROR;
5284     }
5285 
5286     if (cf->args->nelts == 2) {
5287         clcf->disable_symlinks_from = NULL;
5288         return NGX_CONF_OK;
5289     }
5290 
5291     if (clcf->disable_symlinks_from == NGX_CONF_UNSET_PTR) {
5292         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5293                            "duplicate parameters \"%V %V\"",
5294                            &value[1], &value[2]);
5295         return NGX_CONF_ERROR;
5296     }
5297 
5298     if (clcf->disable_symlinks == NGX_DISABLE_SYMLINKS_OFF) {
5299         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5300                            "\"from=\" cannot be used with \"off\" parameter");
5301         return NGX_CONF_ERROR;
5302     }
5303 
5304     return NGX_CONF_OK;
5305 }
5306 
5307 #endif
5308 
5309 
5310 static char *
5311 ngx_http_core_lowat_check(ngx_conf_t *cf, void *post, void *data)
5312 {
5313 #if (NGX_FREEBSD)
5314     ssize_t *np = data;
5315 
5316     if ((u_long) *np >= ngx_freebsd_net_inet_tcp_sendspace) {
5317         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5318                            "\"send_lowat\" must be less than %d "
5319                            "(sysctl net.inet.tcp.sendspace)",
5320                            ngx_freebsd_net_inet_tcp_sendspace);
5321 
5322         return NGX_CONF_ERROR;
5323     }
5324 
5325 #elif !(NGX_HAVE_SO_SNDLOWAT)
5326     ssize_t *np = data;
5327 
5328     ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
5329                        "\"send_lowat\" is not supported, ignored");
5330 
5331     *np = 0;
5332 
5333 #endif
5334 
5335     return NGX_CONF_OK;
5336 }
5337 
5338 
5339 static char *
5340 ngx_http_core_pool_size(ngx_conf_t *cf, void *post, void *data)
5341 {
5342     size_t *sp = data;
5343 
5344     if (*sp < NGX_MIN_POOL_SIZE) {
5345         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5346                            "the pool size must be no less than %uz",
5347                            NGX_MIN_POOL_SIZE);
5348         return NGX_CONF_ERROR;
5349     }
5350 
5351     if (*sp % NGX_POOL_ALIGNMENT) {
5352         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
5353                            "the pool size must be a multiple of %uz",
5354                            NGX_POOL_ALIGNMENT);
5355         return NGX_CONF_ERROR;
5356     }
5357 
5358     return NGX_CONF_OK;
5359 }