Mercurial > hg > nginx
annotate src/http/modules/ngx_http_event_proxy_handler.c @ 21:df7fb216a149
nginx-0.0.1-2002-12-04-19:29:40 import
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 04 Dec 2002 16:29:40 +0000 |
parents | a649c0a0adb3 |
children | aa3b53e74728 |
rev | line source |
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1 |
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2 #include <ngx_config.h> |
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3 #include <ngx_core.h> |
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4 #include <ngx_string.h> |
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5 #include <ngx_file.h> |
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6 #include <ngx_hunk.h> |
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7 #include <ngx_event_write.h> |
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8 #include <ngx_http.h> |
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9 #include <ngx_http_event_proxy_handler.h> |
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11 ngx_http_module_t ngx_http_proxy_module; |
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14 static ngx_chain_t *ngx_http_proxy_create_request(ngx_http_request_t *r); |
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15 static int ngx_http_proxy_connect(ngx_http_request_t *r, |
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16 struct sockaddr_in *addr, |
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17 char *addr_text); |
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18 static int ngx_http_proxy_send_request(ngx_event_t *ev); |
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19 static int ngx_http_proxy_read_response_header(ngx_event_t *ev); |
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20 |
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21 |
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22 static char conn_close[] = "Connection: close" CRLF; |
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25 int ngx_http_proxy_handler(ngx_http_request_t *r) |
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26 { |
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27 struct sockaddr_in addr; |
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28 ngx_chain_t *chain; |
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29 ngx_http_proxy_ctx_t *p; |
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31 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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32 |
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33 if (p == NULL) |
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34 ngx_http_create_ctx(r, p, ngx_http_proxy_module, |
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35 sizeof(ngx_http_proxy_ctx_t)); |
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37 chain = ngx_http_proxy_create_request(r); |
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38 if (chain == NULL) |
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39 return NGX_ERROR; |
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40 |
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41 p->out = chain; |
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43 ngx_memzero(&addr, sizeof(struct sockaddr_in)); |
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44 addr.sin_family = AF_INET; |
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45 addr.sin_addr.s_addr = inet_addr("127.0.0.1"); |
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46 addr.sin_port = htons(9000); |
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48 ngx_http_proxy_connect(r, &addr, "connecting to 127.0.0.1:9000"); |
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49 } |
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51 |
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52 static ngx_chain_t *ngx_http_proxy_create_request(ngx_http_request_t *r) |
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53 { |
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54 int i; |
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55 size_t len; |
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56 ngx_hunk_t *hunk; |
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57 ngx_chain_t *chain; |
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58 ngx_table_elt_t *header; |
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59 |
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60 /* "+ 4" is for "\r\n" after request line and at the header end */ |
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61 len = r->request_line.len + 4; |
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62 |
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63 /* "Connection: close\r\n" */ |
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64 len += sizeof(conn_close) - 1; |
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65 |
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66 header = (ngx_table_elt_t *) r->headers_in.headers->elts; |
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67 for (i = 0; i < r->headers_in.headers->nelts; i++) { |
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68 if (&header[i] == r->headers_in.host) |
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69 continue; |
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70 |
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71 /* "+ 4" is for ": " and "\r\n" */ |
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72 len += header[i].key.len + header[i].value.len + 4; |
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73 } |
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74 |
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75 /* STUB */ len++; |
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76 |
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77 ngx_test_null(hunk, ngx_create_temp_hunk(r->pool, len, 0, 0), NULL); |
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78 ngx_add_hunk_to_chain(chain, hunk, r->pool, NULL); |
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79 |
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80 ngx_memcpy(hunk->last.mem, r->request_line.data, r->request_line.len); |
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81 hunk->last.mem += r->request_line.len; |
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82 *(hunk->last.mem++) = CR; *(hunk->last.mem++) = LF; |
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83 |
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84 ngx_memcpy(hunk->last.mem, conn_close, sizeof(conn_close) - 1); |
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85 hunk->last.mem += sizeof(conn_close) - 1; |
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86 |
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87 for (i = 0; i < r->headers_in.headers->nelts; i++) { |
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88 if (&header[i] == r->headers_in.host) |
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89 continue; |
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90 |
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91 if (&header[i] == r->headers_in.connection) |
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92 continue; |
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93 |
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94 ngx_memcpy(hunk->last.mem, header[i].key.data, header[i].key.len); |
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95 hunk->last.mem += header[i].key.len; |
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96 |
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97 *(hunk->last.mem++) = ':'; *(hunk->last.mem++) = ' '; |
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98 |
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99 ngx_memcpy(hunk->last.mem, header[i].value.data, header[i].value.len); |
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100 hunk->last.mem += header[i].value.len; |
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101 |
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102 *(hunk->last.mem++) = CR; *(hunk->last.mem++) = LF; |
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103 |
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104 ngx_log_debug(r->connection->log, "proxy: '%s: %s'" _ |
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105 header[i].key.data _ header[i].value.data); |
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106 } |
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107 |
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108 /* add "\r\n" at the header end */ |
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109 *(hunk->last.mem++) = CR; *(hunk->last.mem++) = LF; |
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110 |
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111 /* STUB */ *(hunk->last.mem++) = '\0'; |
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112 ngx_log_debug(r->connection->log, "PROXY:\n'%s'" _ hunk->pos.mem); |
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113 |
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114 return chain; |
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115 } |
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116 |
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117 |
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118 static int ngx_http_proxy_connect(ngx_http_request_t *r, |
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119 struct sockaddr_in *addr, |
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120 char *addr_text) |
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121 { |
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122 int rc; |
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123 ngx_err_t err; |
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124 ngx_socket_t s; |
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125 ngx_event_t *rev, *wev; |
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126 ngx_connection_t *c, *pc; |
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127 ngx_http_log_ctx_t *ctx; |
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128 |
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129 c = r->connection; |
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130 ctx = c->log->data; |
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131 ctx->action = addr_text; |
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132 |
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133 s = ngx_socket(AF_INET, SOCK_STREAM, IPPROTO_IP, 0); |
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134 if (s == -1) { |
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135 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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136 ngx_socket_n " failed"); |
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137 return NGX_ERROR; |
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138 } |
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139 |
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140 #if 0 |
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141 if (rcvbuf) { |
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142 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, |
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143 (const void *) &rcvbuf, sizeof(int)) == -1) { |
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144 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno, |
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145 "setsockopt(SO_RCVBUF) failed"); |
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146 |
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147 if (ngx_close_socket(s) == -1) |
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148 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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149 ngx_close_socket_n " failed"); |
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150 |
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151 return NGX_ERROR; |
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152 } |
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153 } |
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154 #endif |
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155 |
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156 if (ngx_nonblocking(s) == -1) { |
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157 ngx_log_error(NGX_LOG_ALERT, c->log, ngx_socket_errno, |
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158 ngx_nonblocking_n " failed"); |
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159 |
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160 if (ngx_close_socket(s) == -1) |
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161 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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162 ngx_close_socket_n " failed"); |
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163 |
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164 return NGX_ERROR; |
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165 } |
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166 |
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167 rc = connect(s, (struct sockaddr *) addr, sizeof(struct sockaddr_in)); |
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168 |
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169 if (rc == -1) { |
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170 err = ngx_socket_errno; |
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171 if (err != NGX_EINPROGRESS) { |
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172 ngx_log_error(NGX_LOG_ERR, c->log, err, "connect() failed"); |
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173 |
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174 if (ngx_close_socket(s) == -1) |
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175 ngx_log_error(NGX_LOG_ERR, c->log, ngx_socket_errno, |
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176 ngx_close_socket_n " failed"); |
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177 |
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178 return NGX_ERROR; |
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179 } |
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180 } |
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181 |
20
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182 pc = &ngx_connections[s]; |
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183 rev = &ngx_read_events[s]; |
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184 wev = &ngx_write_events[s]; |
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185 |
21
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186 ngx_memzero(rev, sizeof(ngx_event_t)); |
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187 ngx_memzero(wev, sizeof(ngx_event_t)); |
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188 ngx_memzero(pc, sizeof(ngx_connection_t)); |
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189 |
21
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190 rev->data = wev->data = pc; |
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191 pc->read = rev; |
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192 pc->write = wev; |
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193 |
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194 pc->data = r; |
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195 |
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196 pc->fd = s; |
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197 pc->server = c->server; |
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198 pc->servers = c->servers; |
19
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199 |
21
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200 pc->log = rev->log = wev->log = c->log; |
19
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201 |
20
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202 ngx_test_null(pc->pool, |
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203 ngx_create_pool(/* STUB */ 1024 /* */, pc->log), |
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204 NGX_ERROR); |
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205 |
21
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206 wev->event_handler = ngx_http_proxy_send_request; |
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207 rev->event_handler = ngx_http_proxy_read_response_header; |
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208 |
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209 #if (HAVE_CLEAR_EVENT) |
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210 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_CLEAR_EVENT) != NGX_OK) |
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211 #else |
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212 if (ngx_add_event(rev, NGX_READ_EVENT, NGX_LEVEL_EVENT) != NGX_OK) |
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213 #endif |
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214 return NGX_ERROR; |
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215 |
21
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216 if (rc == -1) |
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217 return ngx_add_event(wev, NGX_WRITE_EVENT, NGX_ONESHOT_EVENT); |
19
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218 |
21
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219 wev->write = 1; |
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220 wev->ready = 1; |
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221 |
21
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222 return ngx_http_proxy_send_request(wev); |
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223 } |
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224 |
21
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225 |
19
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226 static int ngx_http_proxy_send_request(ngx_event_t *ev) |
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227 { |
20
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228 ngx_chain_t *chain; |
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229 ngx_connection_t *c; |
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230 ngx_http_request_t *r; |
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231 ngx_http_proxy_ctx_t *p; |
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232 |
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233 c = (ngx_connection_t *) ev->data; |
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234 r = (ngx_http_request_t *) c->data; |
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235 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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236 |
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237 chain = ngx_event_write(c, p->out, 0); |
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238 if (chain == (ngx_chain_t *) -1) |
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239 return NGX_ERROR; |
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240 |
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241 p->out = chain; |
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242 |
21
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243 return NGX_AGAIN; |
19
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244 } |
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245 |
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246 |
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247 static int ngx_http_proxy_read_response_header(ngx_event_t *ev) |
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248 { |
21
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249 int n; |
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250 ngx_connection_t *c; |
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251 ngx_http_request_t *r; |
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252 ngx_http_proxy_ctx_t *p; |
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253 |
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254 if (ev->timedout) |
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255 return NGX_ERROR; |
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256 |
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257 c = (ngx_connection_t *) ev->data; |
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258 r = (ngx_http_request_t *) c->data; |
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259 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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260 |
21
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261 if (p->header_in == NULL) { |
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262 ngx_test_null(p->header_in, |
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263 ngx_palloc(r->pool, sizeof(ngx_http_proxy_header_in_t)), |
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264 NGX_ERROR); |
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265 |
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266 ngx_test_null(p->hunk, |
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267 ngx_create_temp_hunk(r->pool, |
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268 /* STUB */ 1024 /* */, 0, 0), |
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269 NGX_ERROR); |
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270 } |
19
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271 |
21
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272 n = ngx_event_recv(c, p->hunk->last.mem, p->hunk->end - p->hunk->last.mem); |
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273 |
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274 ngx_log_debug(r->connection->log, "READ:%d" _ n); |
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275 |
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276 p->hunk->last.mem += n; |
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277 |
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278 *p->hunk->last.mem = '\0'; |
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279 ngx_log_debug(r->connection->log, "PROXY:\n'%s'" _ p->hunk->pos.mem); |
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280 |
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281 /* STUB */ return NGX_ERROR; |
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282 } |
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283 |
21
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284 #if 0 |
19
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285 static int ngx_http_proxy_read_response_body(ngx_event_t *ev) |
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286 { |
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287 ngx_connection_t *c; |
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288 ngx_http_request_t *r; |
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289 ngx_http_proxy_ctx_t *p; |
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290 |
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291 if (ev->timedout) |
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292 return NGX_ERROR; |
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|
293 |
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294 c = (ngx_connection_t *) ev->data; |
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295 r = (ngx_http_request_t *) c->data; |
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296 p = (ngx_http_proxy_ctx_t *) ngx_get_module_ctx(r, ngx_http_proxy_module); |
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|
297 |
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|
298 } |
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299 |
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300 static int ngx_http_proxy_write_to_client(ngx_event_t *ev) |
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301 { |
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302 /* если бэкенд быстрее, то CLEAR, иначе - ONESHOT */ |
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303 |
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304 rc = ngx_http_output_filter(r, h); |
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305 } |
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306 |
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307 #endif |