1/* 2 * Copyright (C) Max Romanov 3 * Copyright (C) NGINX, Inc. 4 */ 5 6package unit 7 8/* 9#include "nxt_cgo_lib.h" 10*/ 11import "C" 12 13import ( 14 "net/http" 15) 16 17type response struct { 18 header http.Header 19 header_sent bool 20 c_req *C.nxt_unit_request_info_t 21 ch chan int 22} 23 24func (r *response) Header() http.Header { 25 return r.header 26} 27 28func (r *response) Write(p []byte) (n int, err error) { 29 if !r.header_sent { 30 r.WriteHeader(http.StatusOK) 31 } 32 33 l := len(p) 34 written := int(0) 35 br := buf_ref(p) 36 37 for written < l { 38 res := C.nxt_cgo_response_write(r.c_req, br, C.uint32_t(l - written)) 39 40 written += int(res) 41 br += C.uintptr_t(res) 42 43 if (written < l) { 44 if r.ch == nil { 45 r.ch = make(chan int, 2) 46 } 47 48 wait_shm_ack(r.ch) 49 } 50 } 51 52 return written, nil 53} 54 55func (r *response) WriteHeader(code int) { 56 if r.header_sent { 57 nxt_go_warn("multiple response.WriteHeader calls") 58 return 59 } 60 r.header_sent = true 61 62 // Set a default Content-Type 63 if _, hasType := r.header["Content-Type"]; !hasType { 64 r.header.Add("Content-Type", "text/html; charset=utf-8") 65 } 66 67 fields := 0 68 fields_size := 0 69 70 for k, vv := range r.header { 71 for _, v := range vv { 72 fields++ 73 fields_size += len(k) + len(v) 74 } 75 } 76 77 C.nxt_unit_response_init(r.c_req, C.uint16_t(code), C.uint32_t(fields), 78 C.uint32_t(fields_size)) 79 80 for k, vv := range r.header { 81 for _, v := range vv { 82 C.nxt_unit_response_add_field(r.c_req, str_ref(k), C.uint8_t(len(k)), 83 str_ref(v), C.uint32_t(len(v))) 84 } 85 } 86 87 C.nxt_unit_response_send(r.c_req) 88} 89 90func (r *response) Flush() { 91 if !r.header_sent { 92 r.WriteHeader(http.StatusOK) 93 } 94} 95 96var observer_registry_ observable 97 98func wait_shm_ack(c chan int) { 99 observer_registry_.attach(c) 100 101 _ = <-c 102} 103 104//export nxt_go_shm_ack_handler 105func nxt_go_shm_ack_handler(ctx *C.nxt_unit_ctx_t) { 106 observer_registry_.notify(1) 107} 108