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0001 0002 /* 0003 * Copyright (C) Igor Sysoev 0004 * Copyright (C) Nginx, Inc. 0005 */ 0006 0007 0008 #ifndef _NGX_HTTP_REQUEST_H_INCLUDED_ 0009 #define _NGX_HTTP_REQUEST_H_INCLUDED_ 0010 0011 0012 #define NGX_HTTP_MAX_URI_CHANGES 10 0013 #define NGX_HTTP_MAX_SUBREQUESTS 50 0014 0015 /* must be 2^n */ 0016 #define NGX_HTTP_LC_HEADER_LEN 32 0017 0018 0019 #define NGX_HTTP_DISCARD_BUFFER_SIZE 4096 0020 #define NGX_HTTP_LINGERING_BUFFER_SIZE 4096 0021 0022 0023 #define NGX_HTTP_VERSION_9 9 0024 #define NGX_HTTP_VERSION_10 1000 0025 #define NGX_HTTP_VERSION_11 1001 0026 #define NGX_HTTP_VERSION_20 2000 0027 0028 #define NGX_HTTP_UNKNOWN 0x0001 0029 #define NGX_HTTP_GET 0x0002 0030 #define NGX_HTTP_HEAD 0x0004 0031 #define NGX_HTTP_POST 0x0008 0032 #define NGX_HTTP_PUT 0x0010 0033 #define NGX_HTTP_DELETE 0x0020 0034 #define NGX_HTTP_MKCOL 0x0040 0035 #define NGX_HTTP_COPY 0x0080 0036 #define NGX_HTTP_MOVE 0x0100 0037 #define NGX_HTTP_OPTIONS 0x0200 0038 #define NGX_HTTP_PROPFIND 0x0400 0039 #define NGX_HTTP_PROPPATCH 0x0800 0040 #define NGX_HTTP_LOCK 0x1000 0041 #define NGX_HTTP_UNLOCK 0x2000 0042 #define NGX_HTTP_PATCH 0x4000 0043 #define NGX_HTTP_TRACE 0x8000 0044 0045 #define NGX_HTTP_CONNECTION_CLOSE 1 0046 #define NGX_HTTP_CONNECTION_KEEP_ALIVE 2 0047 0048 0049 #define NGX_NONE 1 0050 0051 0052 #define NGX_HTTP_PARSE_HEADER_DONE 1 0053 0054 #define NGX_HTTP_CLIENT_ERROR 10 0055 #define NGX_HTTP_PARSE_INVALID_METHOD 10 0056 #define NGX_HTTP_PARSE_INVALID_REQUEST 11 0057 #define NGX_HTTP_PARSE_INVALID_09_METHOD 12 0058 0059 #define NGX_HTTP_PARSE_INVALID_HEADER 13 0060 0061 0062 /* unused 1 */ 0063 #define NGX_HTTP_SUBREQUEST_IN_MEMORY 2 0064 #define NGX_HTTP_SUBREQUEST_WAITED 4 0065 #define NGX_HTTP_SUBREQUEST_CLONE 8 0066 0067 #define NGX_HTTP_LOG_UNSAFE 1 0068 0069 0070 #define NGX_HTTP_CONTINUE 100 0071 #define NGX_HTTP_SWITCHING_PROTOCOLS 101 0072 #define NGX_HTTP_PROCESSING 102 0073 0074 #define NGX_HTTP_OK 200 0075 #define NGX_HTTP_CREATED 201 0076 #define NGX_HTTP_ACCEPTED 202 0077 #define NGX_HTTP_NO_CONTENT 204 0078 #define NGX_HTTP_PARTIAL_CONTENT 206 0079 0080 #define NGX_HTTP_SPECIAL_RESPONSE 300 0081 #define NGX_HTTP_MOVED_PERMANENTLY 301 0082 #define NGX_HTTP_MOVED_TEMPORARILY 302 0083 #define NGX_HTTP_SEE_OTHER 303 0084 #define NGX_HTTP_NOT_MODIFIED 304 0085 #define NGX_HTTP_TEMPORARY_REDIRECT 307 0086 0087 #define NGX_HTTP_BAD_REQUEST 400 0088 #define NGX_HTTP_UNAUTHORIZED 401 0089 #define NGX_HTTP_FORBIDDEN 403 0090 #define NGX_HTTP_NOT_FOUND 404 0091 #define NGX_HTTP_NOT_ALLOWED 405 0092 #define NGX_HTTP_REQUEST_TIME_OUT 408 0093 #define NGX_HTTP_CONFLICT 409 0094 #define NGX_HTTP_LENGTH_REQUIRED 411 0095 #define NGX_HTTP_PRECONDITION_FAILED 412 0096 #define NGX_HTTP_REQUEST_ENTITY_TOO_LARGE 413 0097 #define NGX_HTTP_REQUEST_URI_TOO_LARGE 414 0098 #define NGX_HTTP_UNSUPPORTED_MEDIA_TYPE 415 0099 #define NGX_HTTP_RANGE_NOT_SATISFIABLE 416 0100 #define NGX_HTTP_MISDIRECTED_REQUEST 421 0101 #define NGX_HTTP_TOO_MANY_REQUESTS 429 0102 0103 0104 /* Our own HTTP codes */ 0105 0106 /* The special code to close connection without any response */ 0107 #define NGX_HTTP_CLOSE 444 0108 0109 #define NGX_HTTP_NGINX_CODES 494 0110 0111 #define NGX_HTTP_REQUEST_HEADER_TOO_LARGE 494 0112 0113 #define NGX_HTTPS_CERT_ERROR 495 0114 #define NGX_HTTPS_NO_CERT 496 0115 0116 /* 0117 * We use the special code for the plain HTTP requests that are sent to 0118 * HTTPS port to distinguish it from 4XX in an error page redirection 0119 */ 0120 #define NGX_HTTP_TO_HTTPS 497 0121 0122 /* 498 is the canceled code for the requests with invalid host name */ 0123 0124 /* 0125 * HTTP does not define the code for the case when a client closed 0126 * the connection while we are processing its request so we introduce 0127 * own code to log such situation when a client has closed the connection 0128 * before we even try to send the HTTP header to it 0129 */ 0130 #define NGX_HTTP_CLIENT_CLOSED_REQUEST 499 0131 0132 0133 #define NGX_HTTP_INTERNAL_SERVER_ERROR 500 0134 #define NGX_HTTP_NOT_IMPLEMENTED 501 0135 #define NGX_HTTP_BAD_GATEWAY 502 0136 #define NGX_HTTP_SERVICE_UNAVAILABLE 503 0137 #define NGX_HTTP_GATEWAY_TIME_OUT 504 0138 #define NGX_HTTP_INSUFFICIENT_STORAGE 507 0139 0140 0141 #define NGX_HTTP_LOWLEVEL_BUFFERED 0xf0 0142 #define NGX_HTTP_WRITE_BUFFERED 0x10 0143 #define NGX_HTTP_GZIP_BUFFERED 0x20 0144 #define NGX_HTTP_SSI_BUFFERED 0x01 0145 #define NGX_HTTP_SUB_BUFFERED 0x02 0146 #define NGX_HTTP_COPY_BUFFERED 0x04 0147 0148 0149 typedef enum { 0150 NGX_HTTP_INITING_REQUEST_STATE = 0, 0151 NGX_HTTP_READING_REQUEST_STATE, 0152 NGX_HTTP_PROCESS_REQUEST_STATE, 0153 0154 NGX_HTTP_CONNECT_UPSTREAM_STATE, 0155 NGX_HTTP_WRITING_UPSTREAM_STATE, 0156 NGX_HTTP_READING_UPSTREAM_STATE, 0157 0158 NGX_HTTP_WRITING_REQUEST_STATE, 0159 NGX_HTTP_LINGERING_CLOSE_STATE, 0160 NGX_HTTP_KEEPALIVE_STATE 0161 } ngx_http_state_e; 0162 0163 0164 typedef struct { 0165 ngx_str_t name; 0166 ngx_uint_t offset; 0167 ngx_http_header_handler_pt handler; 0168 } ngx_http_header_t; 0169 0170 0171 typedef struct { 0172 ngx_str_t name; 0173 ngx_uint_t offset; 0174 } ngx_http_header_out_t; 0175 0176 0177 typedef struct { 0178 ngx_list_t headers; 0179 0180 ngx_table_elt_t *host; 0181 ngx_table_elt_t *connection; 0182 ngx_table_elt_t *if_modified_since; 0183 ngx_table_elt_t *if_unmodified_since; 0184 ngx_table_elt_t *if_match; 0185 ngx_table_elt_t *if_none_match; 0186 ngx_table_elt_t *user_agent; 0187 ngx_table_elt_t *referer; 0188 ngx_table_elt_t *content_length; 0189 ngx_table_elt_t *content_range; 0190 ngx_table_elt_t *content_type; 0191 0192 ngx_table_elt_t *range; 0193 ngx_table_elt_t *if_range; 0194 0195 ngx_table_elt_t *transfer_encoding; 0196 ngx_table_elt_t *expect; 0197 ngx_table_elt_t *upgrade; 0198 0199 #if (NGX_HTTP_GZIP) 0200 ngx_table_elt_t *accept_encoding; 0201 ngx_table_elt_t *via; 0202 #endif 0203 0204 ngx_table_elt_t *authorization; 0205 0206 ngx_table_elt_t *keep_alive; 0207 0208 #if (NGX_HTTP_X_FORWARDED_FOR) 0209 ngx_array_t x_forwarded_for; 0210 #endif 0211 0212 #if (NGX_HTTP_REALIP) 0213 ngx_table_elt_t *x_real_ip; 0214 #endif 0215 0216 #if (NGX_HTTP_HEADERS) 0217 ngx_table_elt_t *accept; 0218 ngx_table_elt_t *accept_language; 0219 #endif 0220 0221 #if (NGX_HTTP_DAV) 0222 ngx_table_elt_t *depth; 0223 ngx_table_elt_t *destination; 0224 ngx_table_elt_t *overwrite; 0225 ngx_table_elt_t *date; 0226 #endif 0227 0228 ngx_str_t user; 0229 ngx_str_t passwd; 0230 0231 ngx_array_t cookies; 0232 0233 ngx_str_t server; 0234 off_t content_length_n; 0235 time_t keep_alive_n; 0236 0237 unsigned connection_type:2; 0238 unsigned chunked:1; 0239 unsigned msie:1; 0240 unsigned msie6:1; 0241 unsigned opera:1; 0242 unsigned gecko:1; 0243 unsigned chrome:1; 0244 unsigned safari:1; 0245 unsigned konqueror:1; 0246 } ngx_http_headers_in_t; 0247 0248 0249 typedef struct { 0250 ngx_list_t headers; 0251 0252 ngx_uint_t status; 0253 ngx_str_t status_line; 0254 0255 ngx_table_elt_t *server; 0256 ngx_table_elt_t *date; 0257 ngx_table_elt_t *content_length; 0258 ngx_table_elt_t *content_encoding; 0259 ngx_table_elt_t *location; 0260 ngx_table_elt_t *refresh; 0261 ngx_table_elt_t *last_modified; 0262 ngx_table_elt_t *content_range; 0263 ngx_table_elt_t *accept_ranges; 0264 ngx_table_elt_t *www_authenticate; 0265 ngx_table_elt_t *expires; 0266 ngx_table_elt_t *etag; 0267 0268 ngx_str_t *override_charset; 0269 0270 size_t content_type_len; 0271 ngx_str_t content_type; 0272 ngx_str_t charset; 0273 u_char *content_type_lowcase; 0274 ngx_uint_t content_type_hash; 0275 0276 ngx_array_t cache_control; 0277 0278 off_t content_length_n; 0279 off_t content_offset; 0280 time_t date_time; 0281 time_t last_modified_time; 0282 } ngx_http_headers_out_t; 0283 0284 0285 typedef void (*ngx_http_client_body_handler_pt)(ngx_http_request_t *r); 0286 0287 typedef struct { 0288 ngx_temp_file_t *temp_file; 0289 ngx_chain_t *bufs; 0290 ngx_buf_t *buf; 0291 off_t rest; 0292 off_t received; 0293 ngx_chain_t *free; 0294 ngx_chain_t *busy; 0295 ngx_http_chunked_t *chunked; 0296 ngx_http_client_body_handler_pt post_handler; 0297 } ngx_http_request_body_t; 0298 0299 0300 typedef struct ngx_http_addr_conf_s ngx_http_addr_conf_t; 0301 0302 typedef struct { 0303 ngx_http_addr_conf_t *addr_conf; 0304 ngx_http_conf_ctx_t *conf_ctx; 0305 0306 #if (NGX_HTTP_SSL || NGX_COMPAT) 0307 ngx_str_t *ssl_servername; 0308 #if (NGX_PCRE) 0309 ngx_http_regex_t *ssl_servername_regex; 0310 #endif 0311 #endif 0312 0313 ngx_chain_t *busy; 0314 ngx_int_t nbusy; 0315 0316 ngx_chain_t *free; 0317 0318 unsigned ssl:1; 0319 unsigned proxy_protocol:1; 0320 } ngx_http_connection_t; 0321 0322 0323 typedef void (*ngx_http_cleanup_pt)(void *data); 0324 0325 typedef struct ngx_http_cleanup_s ngx_http_cleanup_t; 0326 0327 struct ngx_http_cleanup_s { 0328 ngx_http_cleanup_pt handler; 0329 void *data; 0330 ngx_http_cleanup_t *next; 0331 }; 0332 0333 0334 typedef ngx_int_t (*ngx_http_post_subrequest_pt)(ngx_http_request_t *r, 0335 void *data, ngx_int_t rc); 0336 0337 typedef struct { 0338 ngx_http_post_subrequest_pt handler; 0339 void *data; 0340 } ngx_http_post_subrequest_t; 0341 0342 0343 typedef struct ngx_http_postponed_request_s ngx_http_postponed_request_t; 0344 0345 struct ngx_http_postponed_request_s { 0346 ngx_http_request_t *request; 0347 ngx_chain_t *out; 0348 ngx_http_postponed_request_t *next; 0349 }; 0350 0351 0352 typedef struct ngx_http_posted_request_s ngx_http_posted_request_t; 0353 0354 struct ngx_http_posted_request_s { 0355 ngx_http_request_t *request; 0356 ngx_http_posted_request_t *next; 0357 }; 0358 0359 0360 typedef ngx_int_t (*ngx_http_handler_pt)(ngx_http_request_t *r); 0361 typedef void (*ngx_http_event_handler_pt)(ngx_http_request_t *r); 0362 0363 0364 struct ngx_http_request_s { 0365 uint32_t signature; /* "HTTP" */ 0366 0367 ngx_connection_t *connection; 0368 0369 void **ctx; 0370 void **main_conf; 0371 void **srv_conf; 0372 void **loc_conf; 0373 0374 ngx_http_event_handler_pt read_event_handler; 0375 ngx_http_event_handler_pt write_event_handler; 0376 0377 #if (NGX_HTTP_CACHE) 0378 ngx_http_cache_t *cache; 0379 #endif 0380 0381 ngx_http_upstream_t *upstream; 0382 ngx_array_t *upstream_states; 0383 /* of ngx_http_upstream_state_t */ 0384 0385 ngx_pool_t *pool; 0386 ngx_buf_t *header_in; 0387 0388 ngx_http_headers_in_t headers_in; 0389 ngx_http_headers_out_t headers_out; 0390 0391 ngx_http_request_body_t *request_body; 0392 0393 time_t lingering_time; 0394 time_t start_sec; 0395 ngx_msec_t start_msec; 0396 0397 ngx_uint_t method; 0398 ngx_uint_t http_version; 0399 0400 ngx_str_t request_line; 0401 ngx_str_t uri; 0402 ngx_str_t args; 0403 ngx_str_t exten; 0404 ngx_str_t unparsed_uri; 0405 0406 ngx_str_t method_name; 0407 ngx_str_t http_protocol; 0408 0409 ngx_chain_t *out; 0410 ngx_http_request_t *main; 0411 ngx_http_request_t *parent; 0412 ngx_http_postponed_request_t *postponed; 0413 ngx_http_post_subrequest_t *post_subrequest; 0414 ngx_http_posted_request_t *posted_requests; 0415 0416 ngx_int_t phase_handler; 0417 ngx_http_handler_pt content_handler; 0418 ngx_uint_t access_code; 0419 0420 ngx_http_variable_value_t *variables; 0421 0422 #if (NGX_PCRE) 0423 ngx_uint_t ncaptures; 0424 int *captures; 0425 u_char *captures_data; 0426 #endif 0427 0428 size_t limit_rate; 0429 size_t limit_rate_after; 0430 0431 /* used to learn the Apache compatible response length without a header */ 0432 size_t header_size; 0433 0434 off_t request_length; 0435 0436 ngx_uint_t err_status; 0437 0438 ngx_http_connection_t *http_connection; 0439 ngx_http_v2_stream_t *stream; 0440 0441 ngx_http_log_handler_pt log_handler; 0442 0443 ngx_http_cleanup_t *cleanup; 0444 0445 unsigned count:16; 0446 unsigned subrequests:8; 0447 unsigned blocked:8; 0448 0449 unsigned aio:1; 0450 0451 unsigned http_state:4; 0452 0453 /* URI with "/." and on Win32 with "//" */ 0454 unsigned complex_uri:1; 0455 0456 /* URI with "%" */ 0457 unsigned quoted_uri:1; 0458 0459 /* URI with "+" */ 0460 unsigned plus_in_uri:1; 0461 0462 /* URI with " " */ 0463 unsigned space_in_uri:1; 0464 0465 unsigned invalid_header:1; 0466 0467 unsigned add_uri_to_alias:1; 0468 unsigned valid_location:1; 0469 unsigned valid_unparsed_uri:1; 0470 unsigned uri_changed:1; 0471 unsigned uri_changes:4; 0472 0473 unsigned request_body_in_single_buf:1; 0474 unsigned request_body_in_file_only:1; 0475 unsigned request_body_in_persistent_file:1; 0476 unsigned request_body_in_clean_file:1; 0477 unsigned request_body_file_group_access:1; 0478 unsigned request_body_file_log_level:3; 0479 unsigned request_body_no_buffering:1; 0480 0481 unsigned subrequest_in_memory:1; 0482 unsigned waited:1; 0483 0484 #if (NGX_HTTP_CACHE) 0485 unsigned cached:1; 0486 unsigned cache_updater:1; 0487 #endif 0488 0489 #if (NGX_HTTP_GZIP) 0490 unsigned gzip_tested:1; 0491 unsigned gzip_ok:1; 0492 unsigned gzip_vary:1; 0493 #endif 0494 0495 unsigned proxy:1; 0496 unsigned bypass_cache:1; 0497 unsigned no_cache:1; 0498 0499 /* 0500 * instead of using the request context data in 0501 * ngx_http_limit_conn_module and ngx_http_limit_req_module 0502 * we use the single bits in the request structure 0503 */ 0504 unsigned limit_conn_set:1; 0505 unsigned limit_req_set:1; 0506 0507 #if 0 0508 unsigned cacheable:1; 0509 #endif 0510 0511 unsigned pipeline:1; 0512 unsigned chunked:1; 0513 unsigned header_only:1; 0514 unsigned keepalive:1; 0515 unsigned lingering_close:1; 0516 unsigned discard_body:1; 0517 unsigned reading_body:1; 0518 unsigned internal:1; 0519 unsigned error_page:1; 0520 unsigned filter_finalize:1; 0521 unsigned post_action:1; 0522 unsigned request_complete:1; 0523 unsigned request_output:1; 0524 unsigned header_sent:1; 0525 unsigned expect_tested:1; 0526 unsigned root_tested:1; 0527 unsigned done:1; 0528 unsigned logged:1; 0529 0530 unsigned buffered:4; 0531 0532 unsigned main_filter_need_in_memory:1; 0533 unsigned filter_need_in_memory:1; 0534 unsigned filter_need_temporary:1; 0535 unsigned allow_ranges:1; 0536 unsigned subrequest_ranges:1; 0537 unsigned single_range:1; 0538 unsigned disable_not_modified:1; 0539 unsigned stat_reading:1; 0540 unsigned stat_writing:1; 0541 unsigned stat_processing:1; 0542 0543 unsigned health_check:1; 0544 0545 /* used to parse HTTP headers */ 0546 0547 ngx_uint_t state; 0548 0549 ngx_uint_t header_hash; 0550 ngx_uint_t lowcase_index; 0551 u_char lowcase_header[NGX_HTTP_LC_HEADER_LEN]; 0552 0553 u_char *header_name_start; 0554 u_char *header_name_end; 0555 u_char *header_start; 0556 u_char *header_end; 0557 0558 /* 0559 * a memory that can be reused after parsing a request line 0560 * via ngx_http_ephemeral_t 0561 */ 0562 0563 u_char *uri_start; 0564 u_char *uri_end; 0565 u_char *uri_ext; 0566 u_char *args_start; 0567 u_char *request_start; 0568 u_char *request_end; 0569 u_char *method_end; 0570 u_char *schema_start; 0571 u_char *schema_end; 0572 u_char *host_start; 0573 u_char *host_end; 0574 u_char *port_start; 0575 u_char *port_end; 0576 0577 unsigned http_minor:16; 0578 unsigned http_major:16; 0579 }; 0580 0581 0582 typedef struct { 0583 ngx_http_posted_request_t terminal_posted_request; 0584 } ngx_http_ephemeral_t; 0585 0586 0587 #define ngx_http_ephemeral(r) (void *) (&r->uri_start) 0588 0589 0590 extern ngx_http_header_t ngx_http_headers_in[]; 0591 extern ngx_http_header_out_t ngx_http_headers_out[]; 0592 0593 0594 #define ngx_http_set_log_request(log, r) \ 0595 ((ngx_http_log_ctx_t *) log->data)->current_request = r 0596 0597 0598 #endif /* _NGX_HTTP_REQUEST_H_INCLUDED_ */
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