Mercurial > hg > nginx-quic
annotate src/http/ngx_http_upstream.h @ 6639:82efcedb310b
HTTP/2: avoid sending output queue if there's nothing to send.
Particularly this fixes alerts on OS X and NetBSD systems when HTTP/2 is
configured over plain TCP sockets.
On these systems calling writev() with no data leads to EINVAL errors
being logged as "writev() failed (22: Invalid argument) while processing
HTTP/2 connection".
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Tue, 19 Jul 2016 20:30:21 +0300 |
parents | 1d0e03db9f8e |
children | c131f20c9562 |
rev | line source |
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479 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
479 | 5 */ |
6 | |
7 | |
8 #ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_ | |
9 #define _NGX_HTTP_UPSTREAM_H_INCLUDED_ | |
10 | |
11 | |
12 #include <ngx_config.h> | |
13 #include <ngx_core.h> | |
14 #include <ngx_event.h> | |
15 #include <ngx_event_connect.h> | |
16 #include <ngx_event_pipe.h> | |
17 #include <ngx_http.h> | |
18 | |
19 | |
665 | 20 #define NGX_HTTP_UPSTREAM_FT_ERROR 0x00000002 |
21 #define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x00000004 | |
22 #define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x00000008 | |
23 #define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x00000010 | |
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24 #define NGX_HTTP_UPSTREAM_FT_HTTP_502 0x00000020 |
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25 #define NGX_HTTP_UPSTREAM_FT_HTTP_503 0x00000040 |
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26 #define NGX_HTTP_UPSTREAM_FT_HTTP_504 0x00000080 |
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27 #define NGX_HTTP_UPSTREAM_FT_HTTP_403 0x00000100 |
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28 #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x00000200 |
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29 #define NGX_HTTP_UPSTREAM_FT_UPDATING 0x00000400 |
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30 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00000800 |
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31 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00001000 |
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32 #define NGX_HTTP_UPSTREAM_FT_NON_IDEMPOTENT 0x00002000 |
1378 | 33 #define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000 |
665 | 34 #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000 |
479 | 35 |
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36 #define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \ |
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37 |NGX_HTTP_UPSTREAM_FT_HTTP_502 \ |
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38 |NGX_HTTP_UPSTREAM_FT_HTTP_503 \ |
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39 |NGX_HTTP_UPSTREAM_FT_HTTP_504 \ |
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40 |NGX_HTTP_UPSTREAM_FT_HTTP_403 \ |
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41 |NGX_HTTP_UPSTREAM_FT_HTTP_404) |
479 | 42 |
43 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40 | |
44 | |
45 | |
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46 #define NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT 0x00000002 |
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47 #define NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 0x00000004 |
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48 #define NGX_HTTP_UPSTREAM_IGN_EXPIRES 0x00000008 |
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49 #define NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010 |
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50 #define NGX_HTTP_UPSTREAM_IGN_SET_COOKIE 0x00000020 |
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51 #define NGX_HTTP_UPSTREAM_IGN_XA_LIMIT_RATE 0x00000040 |
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52 #define NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING 0x00000080 |
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53 #define NGX_HTTP_UPSTREAM_IGN_XA_CHARSET 0x00000100 |
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54 #define NGX_HTTP_UPSTREAM_IGN_VARY 0x00000200 |
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55 |
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56 |
479 | 57 typedef struct { |
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58 ngx_msec_t bl_time; |
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59 ngx_uint_t bl_state; |
479 | 60 |
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61 ngx_uint_t status; |
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62 ngx_msec_t response_time; |
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63 ngx_msec_t connect_time; |
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64 ngx_msec_t header_time; |
3795 | 65 off_t response_length; |
563 | 66 |
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67 ngx_str_t *peer; |
479 | 68 } ngx_http_upstream_state_t; |
69 | |
70 | |
71 typedef struct { | |
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72 ngx_hash_t headers_in_hash; |
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73 ngx_array_t upstreams; |
884 | 74 /* ngx_http_upstream_srv_conf_t */ |
509 | 75 } ngx_http_upstream_main_conf_t; |
76 | |
884 | 77 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t; |
78 | |
79 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf, | |
80 ngx_http_upstream_srv_conf_t *us); | |
81 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r, | |
82 ngx_http_upstream_srv_conf_t *us); | |
83 | |
84 | |
85 typedef struct { | |
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86 ngx_http_upstream_init_pt init_upstream; |
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87 ngx_http_upstream_init_peer_pt init; |
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88 void *data; |
884 | 89 } ngx_http_upstream_peer_t; |
90 | |
509 | 91 |
92 typedef struct { | |
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93 ngx_str_t name; |
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94 ngx_addr_t *addrs; |
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95 ngx_uint_t naddrs; |
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96 ngx_uint_t weight; |
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97 ngx_uint_t max_fails; |
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98 time_t fail_timeout; |
884 | 99 |
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100 unsigned down:1; |
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101 unsigned backup:1; |
884 | 102 } ngx_http_upstream_server_t; |
103 | |
651 | 104 |
884 | 105 #define NGX_HTTP_UPSTREAM_CREATE 0x0001 |
106 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002 | |
107 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004 | |
108 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008 | |
109 #define NGX_HTTP_UPSTREAM_DOWN 0x0010 | |
110 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020 | |
111 | |
651 | 112 |
884 | 113 struct ngx_http_upstream_srv_conf_s { |
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114 ngx_http_upstream_peer_t peer; |
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115 void **srv_conf; |
884 | 116 |
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117 ngx_array_t *servers; /* ngx_http_upstream_server_t */ |
884 | 118 |
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119 ngx_uint_t flags; |
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120 ngx_str_t host; |
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121 u_char *file_name; |
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122 ngx_uint_t line; |
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123 in_port_t port; |
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124 in_port_t default_port; |
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125 ngx_uint_t no_port; /* unsigned no_port:1 */ |
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126 |
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127 #if (NGX_HTTP_UPSTREAM_ZONE) |
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128 ngx_shm_zone_t *shm_zone; |
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129 #endif |
884 | 130 }; |
651 | 131 |
132 | |
133 typedef struct { | |
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134 ngx_addr_t *addr; |
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135 ngx_http_complex_value_t *value; |
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136 #if (NGX_HAVE_TRANSPARENT_PROXY) |
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137 ngx_uint_t transparent; /* unsigned transparent:1; */ |
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138 #endif |
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139 } ngx_http_upstream_local_t; |
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140 |
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141 |
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142 typedef struct { |
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143 ngx_http_upstream_srv_conf_t *upstream; |
884 | 144 |
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145 ngx_msec_t connect_timeout; |
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146 ngx_msec_t send_timeout; |
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147 ngx_msec_t read_timeout; |
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148 ngx_msec_t timeout; |
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149 ngx_msec_t next_upstream_timeout; |
479 | 150 |
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151 size_t send_lowat; |
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152 size_t buffer_size; |
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153 size_t limit_rate; |
529 | 154 |
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155 size_t busy_buffers_size; |
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156 size_t max_temp_file_size; |
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157 size_t temp_file_write_size; |
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158 |
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159 size_t busy_buffers_size_conf; |
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160 size_t max_temp_file_size_conf; |
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161 size_t temp_file_write_size_conf; |
509 | 162 |
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163 ngx_bufs_t bufs; |
529 | 164 |
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165 ngx_uint_t ignore_headers; |
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166 ngx_uint_t next_upstream; |
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167 ngx_uint_t store_access; |
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168 ngx_uint_t next_upstream_tries; |
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169 ngx_flag_t buffering; |
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170 ngx_flag_t request_buffering; |
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171 ngx_flag_t pass_request_headers; |
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172 ngx_flag_t pass_request_body; |
479 | 173 |
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174 ngx_flag_t ignore_client_abort; |
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175 ngx_flag_t intercept_errors; |
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176 ngx_flag_t cyclic_temp_file; |
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177 ngx_flag_t force_ranges; |
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178 |
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179 ngx_path_t *temp_path; |
479 | 180 |
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181 ngx_hash_t hide_headers_hash; |
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182 ngx_array_t *hide_headers; |
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183 ngx_array_t *pass_headers; |
509 | 184 |
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185 ngx_http_upstream_local_t *local; |
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186 |
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187 #if (NGX_HTTP_CACHE) |
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188 ngx_shm_zone_t *cache_zone; |
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189 ngx_http_complex_value_t *cache_value; |
479 | 190 |
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191 ngx_uint_t cache_min_uses; |
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192 ngx_uint_t cache_use_stale; |
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193 ngx_uint_t cache_methods; |
479 | 194 |
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195 ngx_flag_t cache_lock; |
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196 ngx_msec_t cache_lock_timeout; |
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197 ngx_msec_t cache_lock_age; |
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198 |
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199 ngx_flag_t cache_revalidate; |
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200 ngx_flag_t cache_convert_head; |
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201 |
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202 ngx_array_t *cache_valid; |
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203 ngx_array_t *cache_bypass; |
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204 ngx_array_t *no_cache; |
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205 #endif |
509 | 206 |
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207 ngx_array_t *store_lengths; |
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208 ngx_array_t *store_values; |
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209 |
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210 #if (NGX_HTTP_CACHE) |
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211 signed cache:2; |
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212 #endif |
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213 signed store:2; |
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214 unsigned intercept_404:1; |
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215 unsigned change_buffering:1; |
581 | 216 |
577 | 217 #if (NGX_HTTP_SSL) |
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218 ngx_ssl_t *ssl; |
2754 | 219 ngx_flag_t ssl_session_reuse; |
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220 |
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221 ngx_http_complex_value_t *ssl_name; |
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222 ngx_flag_t ssl_server_name; |
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223 ngx_flag_t ssl_verify; |
577 | 224 #endif |
225 | |
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226 ngx_str_t module; |
479 | 227 } ngx_http_upstream_conf_t; |
228 | |
229 | |
509 | 230 typedef struct { |
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231 ngx_str_t name; |
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232 ngx_http_header_handler_pt handler; |
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233 ngx_uint_t offset; |
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234 ngx_http_header_handler_pt copy_handler; |
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235 ngx_uint_t conf; |
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236 ngx_uint_t redirect; /* unsigned redirect:1; */ |
509 | 237 } ngx_http_upstream_header_t; |
238 | |
239 | |
240 typedef struct { | |
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241 ngx_list_t headers; |
509 | 242 |
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243 ngx_uint_t status_n; |
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244 ngx_str_t status_line; |
529 | 245 |
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246 ngx_table_elt_t *status; |
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247 ngx_table_elt_t *date; |
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248 ngx_table_elt_t *server; |
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249 ngx_table_elt_t *connection; |
509 | 250 |
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251 ngx_table_elt_t *expires; |
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252 ngx_table_elt_t *etag; |
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253 ngx_table_elt_t *x_accel_expires; |
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254 ngx_table_elt_t *x_accel_redirect; |
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255 ngx_table_elt_t *x_accel_limit_rate; |
509 | 256 |
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257 ngx_table_elt_t *content_type; |
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258 ngx_table_elt_t *content_length; |
509 | 259 |
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260 ngx_table_elt_t *last_modified; |
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261 ngx_table_elt_t *location; |
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262 ngx_table_elt_t *accept_ranges; |
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263 ngx_table_elt_t *www_authenticate; |
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264 ngx_table_elt_t *transfer_encoding; |
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265 ngx_table_elt_t *vary; |
509 | 266 |
267 #if (NGX_HTTP_GZIP) | |
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268 ngx_table_elt_t *content_encoding; |
509 | 269 #endif |
270 | |
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271 ngx_array_t cache_control; |
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272 ngx_array_t cookies; |
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273 |
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274 off_t content_length_n; |
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275 time_t last_modified_time; |
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276 |
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277 unsigned connection_close:1; |
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278 unsigned chunked:1; |
509 | 279 } ngx_http_upstream_headers_in_t; |
280 | |
479 | 281 |
1658 | 282 typedef struct { |
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283 ngx_str_t host; |
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284 in_port_t port; |
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285 ngx_uint_t no_port; /* unsigned no_port:1 */ |
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286 |
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287 ngx_uint_t naddrs; |
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288 ngx_resolver_addr_t *addrs; |
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289 |
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290 struct sockaddr *sockaddr; |
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291 socklen_t socklen; |
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292 |
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293 ngx_resolver_ctx_t *ctx; |
1658 | 294 } ngx_http_upstream_resolved_t; |
295 | |
296 | |
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297 typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r, |
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298 ngx_http_upstream_t *u); |
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299 |
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300 |
479 | 301 struct ngx_http_upstream_s { |
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302 ngx_http_upstream_handler_pt read_event_handler; |
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303 ngx_http_upstream_handler_pt write_event_handler; |
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304 |
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305 ngx_peer_connection_t peer; |
479 | 306 |
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307 ngx_event_pipe_t *pipe; |
479 | 308 |
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309 ngx_chain_t *request_bufs; |
479 | 310 |
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311 ngx_output_chain_ctx_t output; |
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312 ngx_chain_writer_ctx_t writer; |
479 | 313 |
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314 ngx_http_upstream_conf_t *conf; |
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315 #if (NGX_HTTP_CACHE) |
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316 ngx_array_t *caches; |
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317 #endif |
479 | 318 |
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319 ngx_http_upstream_headers_in_t headers_in; |
509 | 320 |
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321 ngx_http_upstream_resolved_t *resolved; |
1658 | 322 |
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323 ngx_buf_t from_client; |
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324 |
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325 ngx_buf_t buffer; |
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326 off_t length; |
581 | 327 |
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328 ngx_chain_t *out_bufs; |
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329 ngx_chain_t *busy_bufs; |
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330 ngx_chain_t *free_bufs; |
581 | 331 |
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332 ngx_int_t (*input_filter_init)(void *data); |
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333 ngx_int_t (*input_filter)(void *data, ssize_t bytes); |
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334 void *input_filter_ctx; |
479 | 335 |
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336 #if (NGX_HTTP_CACHE) |
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337 ngx_int_t (*create_key)(ngx_http_request_t *r); |
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338 #endif |
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339 ngx_int_t (*create_request)(ngx_http_request_t *r); |
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340 ngx_int_t (*reinit_request)(ngx_http_request_t *r); |
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341 ngx_int_t (*process_header)(ngx_http_request_t *r); |
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342 void (*abort_request)(ngx_http_request_t *r); |
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343 void (*finalize_request)(ngx_http_request_t *r, |
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344 ngx_int_t rc); |
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345 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r, |
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346 ngx_table_elt_t *h, size_t prefix); |
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347 ngx_int_t (*rewrite_cookie)(ngx_http_request_t *r, |
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348 ngx_table_elt_t *h); |
479 | 349 |
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350 ngx_msec_t timeout; |
527 | 351 |
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352 ngx_http_upstream_state_t *state; |
479 | 353 |
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354 ngx_str_t method; |
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355 ngx_str_t schema; |
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356 ngx_str_t uri; |
555 | 357 |
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358 #if (NGX_HTTP_SSL) |
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359 ngx_str_t ssl_name; |
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360 #endif |
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361 |
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362 ngx_http_cleanup_pt *cleanup; |
569 | 363 |
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364 unsigned store:1; |
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365 unsigned cacheable:1; |
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366 unsigned accel:1; |
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367 unsigned ssl:1; |
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368 #if (NGX_HTTP_CACHE) |
2952 | 369 unsigned cache_status:3; |
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370 #endif |
479 | 371 |
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372 unsigned buffering:1; |
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373 unsigned keepalive:1; |
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374 unsigned upgrade:1; |
649 | 375 |
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376 unsigned request_sent:1; |
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377 unsigned request_body_sent:1; |
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378 unsigned header_sent:1; |
479 | 379 }; |
380 | |
381 | |
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382 typedef struct { |
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383 ngx_uint_t status; |
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384 ngx_uint_t mask; |
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385 } ngx_http_upstream_next_t; |
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386 |
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387 |
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388 typedef struct { |
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389 ngx_str_t key; |
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390 ngx_str_t value; |
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391 ngx_uint_t skip_empty; |
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392 } ngx_http_upstream_param_t; |
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393 |
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394 |
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395 ngx_int_t ngx_http_upstream_cookie_variable(ngx_http_request_t *r, |
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396 ngx_http_variable_value_t *v, uintptr_t data); |
1162 | 397 ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r, |
398 ngx_http_variable_value_t *v, uintptr_t data); | |
399 | |
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400 ngx_int_t ngx_http_upstream_create(ngx_http_request_t *r); |
479 | 401 void ngx_http_upstream_init(ngx_http_request_t *r); |
651 | 402 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf, |
884 | 403 ngx_url_t *u, ngx_uint_t flags); |
3399 | 404 char *ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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405 void *conf); |
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406 char *ngx_http_upstream_param_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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407 void *conf); |
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408 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf, |
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409 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev, |
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410 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash); |
884 | 411 |
412 | |
413 #define ngx_http_conf_upstream_srv_conf(uscf, module) \ | |
414 uscf->srv_conf[module.ctx_index] | |
509 | 415 |
479 | 416 |
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417 extern ngx_module_t ngx_http_upstream_module; |
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418 extern ngx_conf_bitmask_t ngx_http_upstream_cache_method_mask[]; |
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419 extern ngx_conf_bitmask_t ngx_http_upstream_ignore_headers_masks[]; |
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420 |
479 | 421 |
422 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */ |