Mercurial > hg > nginx-quic
annotate src/http/ngx_http_upstream.h @ 6750:cb330cd39030 stable-1.10
HTTP/2: implemented preread buffer for request body (closes #959).
Previously, the stream's window was kept zero in order to prevent a client
from sending the request body before it was requested (see 887cca40ba6a for
details). Until such initial window was acknowledged all requests with
data were rejected (see 0aa07850922f for details).
That approach revealed a number of problems:
1. Some clients (notably MS IE/Edge, Safari, iOS applications) show an error
or even crash if a stream is rejected;
2. This requires at least one RTT for every request with body before the
client receives window update and able to send data.
To overcome these problems the new directive "http2_body_preread_size" is
introduced. It sets the initial window and configures a special per stream
preread buffer that is used to save all incoming data before the body is
requested and processed.
If the directive's value is lower than the default initial window (65535),
as previously, all streams with data will be rejected until the new window
is acknowledged. Otherwise, no special processing is used and all requests
with data are welcome right from the connection start.
The default value is chosen to be 64k, which is bigger than the default
initial window. Setting it to zero is fully complaint to the previous
behavior.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Tue, 24 May 2016 17:37:52 +0300 |
parents | 91c8d990fb45 |
children | 1d0e03db9f8e |
rev | line source |
---|---|
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 } ngx_http_upstream_local_t; |
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137 |
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138 |
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139 typedef struct { |
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140 ngx_http_upstream_srv_conf_t *upstream; |
884 | 141 |
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142 ngx_msec_t connect_timeout; |
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143 ngx_msec_t send_timeout; |
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144 ngx_msec_t read_timeout; |
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145 ngx_msec_t timeout; |
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146 ngx_msec_t next_upstream_timeout; |
479 | 147 |
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148 size_t send_lowat; |
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149 size_t buffer_size; |
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150 size_t limit_rate; |
529 | 151 |
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152 size_t busy_buffers_size; |
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153 size_t max_temp_file_size; |
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154 size_t temp_file_write_size; |
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155 |
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156 size_t busy_buffers_size_conf; |
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157 size_t max_temp_file_size_conf; |
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158 size_t temp_file_write_size_conf; |
509 | 159 |
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160 ngx_bufs_t bufs; |
529 | 161 |
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162 ngx_uint_t ignore_headers; |
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163 ngx_uint_t next_upstream; |
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164 ngx_uint_t store_access; |
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165 ngx_uint_t next_upstream_tries; |
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166 ngx_flag_t buffering; |
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167 ngx_flag_t request_buffering; |
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168 ngx_flag_t pass_request_headers; |
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169 ngx_flag_t pass_request_body; |
479 | 170 |
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171 ngx_flag_t ignore_client_abort; |
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172 ngx_flag_t intercept_errors; |
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173 ngx_flag_t cyclic_temp_file; |
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174 ngx_flag_t force_ranges; |
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175 |
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176 ngx_path_t *temp_path; |
479 | 177 |
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178 ngx_hash_t hide_headers_hash; |
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179 ngx_array_t *hide_headers; |
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180 ngx_array_t *pass_headers; |
509 | 181 |
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182 ngx_http_upstream_local_t *local; |
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183 |
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184 #if (NGX_HTTP_CACHE) |
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185 ngx_shm_zone_t *cache_zone; |
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186 ngx_http_complex_value_t *cache_value; |
479 | 187 |
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188 ngx_uint_t cache_min_uses; |
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189 ngx_uint_t cache_use_stale; |
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190 ngx_uint_t cache_methods; |
479 | 191 |
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192 ngx_flag_t cache_lock; |
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193 ngx_msec_t cache_lock_timeout; |
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194 ngx_msec_t cache_lock_age; |
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195 |
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196 ngx_flag_t cache_revalidate; |
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197 ngx_flag_t cache_convert_head; |
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198 |
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199 ngx_array_t *cache_valid; |
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200 ngx_array_t *cache_bypass; |
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201 ngx_array_t *no_cache; |
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202 #endif |
509 | 203 |
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204 ngx_array_t *store_lengths; |
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205 ngx_array_t *store_values; |
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206 |
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207 #if (NGX_HTTP_CACHE) |
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208 signed cache:2; |
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209 #endif |
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210 signed store:2; |
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211 unsigned intercept_404:1; |
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212 unsigned change_buffering:1; |
581 | 213 |
577 | 214 #if (NGX_HTTP_SSL) |
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215 ngx_ssl_t *ssl; |
2754 | 216 ngx_flag_t ssl_session_reuse; |
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217 |
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218 ngx_http_complex_value_t *ssl_name; |
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219 ngx_flag_t ssl_server_name; |
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220 ngx_flag_t ssl_verify; |
577 | 221 #endif |
222 | |
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223 ngx_str_t module; |
479 | 224 } ngx_http_upstream_conf_t; |
225 | |
226 | |
509 | 227 typedef struct { |
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228 ngx_str_t name; |
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229 ngx_http_header_handler_pt handler; |
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230 ngx_uint_t offset; |
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231 ngx_http_header_handler_pt copy_handler; |
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232 ngx_uint_t conf; |
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233 ngx_uint_t redirect; /* unsigned redirect:1; */ |
509 | 234 } ngx_http_upstream_header_t; |
235 | |
236 | |
237 typedef struct { | |
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238 ngx_list_t headers; |
509 | 239 |
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240 ngx_uint_t status_n; |
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241 ngx_str_t status_line; |
529 | 242 |
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243 ngx_table_elt_t *status; |
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244 ngx_table_elt_t *date; |
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245 ngx_table_elt_t *server; |
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246 ngx_table_elt_t *connection; |
509 | 247 |
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248 ngx_table_elt_t *expires; |
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249 ngx_table_elt_t *etag; |
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250 ngx_table_elt_t *x_accel_expires; |
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251 ngx_table_elt_t *x_accel_redirect; |
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252 ngx_table_elt_t *x_accel_limit_rate; |
509 | 253 |
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254 ngx_table_elt_t *content_type; |
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255 ngx_table_elt_t *content_length; |
509 | 256 |
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257 ngx_table_elt_t *last_modified; |
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258 ngx_table_elt_t *location; |
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259 ngx_table_elt_t *accept_ranges; |
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260 ngx_table_elt_t *www_authenticate; |
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261 ngx_table_elt_t *transfer_encoding; |
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262 ngx_table_elt_t *vary; |
509 | 263 |
264 #if (NGX_HTTP_GZIP) | |
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265 ngx_table_elt_t *content_encoding; |
509 | 266 #endif |
267 | |
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268 ngx_array_t cache_control; |
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269 ngx_array_t cookies; |
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270 |
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271 off_t content_length_n; |
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272 time_t last_modified_time; |
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273 |
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274 unsigned connection_close:1; |
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275 unsigned chunked:1; |
509 | 276 } ngx_http_upstream_headers_in_t; |
277 | |
479 | 278 |
1658 | 279 typedef struct { |
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280 ngx_str_t host; |
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281 in_port_t port; |
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282 ngx_uint_t no_port; /* unsigned no_port:1 */ |
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283 |
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284 ngx_uint_t naddrs; |
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285 ngx_resolver_addr_t *addrs; |
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286 |
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287 struct sockaddr *sockaddr; |
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288 socklen_t socklen; |
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289 |
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290 ngx_resolver_ctx_t *ctx; |
1658 | 291 } ngx_http_upstream_resolved_t; |
292 | |
293 | |
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294 typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r, |
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295 ngx_http_upstream_t *u); |
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296 |
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297 |
479 | 298 struct ngx_http_upstream_s { |
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299 ngx_http_upstream_handler_pt read_event_handler; |
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300 ngx_http_upstream_handler_pt write_event_handler; |
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301 |
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302 ngx_peer_connection_t peer; |
479 | 303 |
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304 ngx_event_pipe_t *pipe; |
479 | 305 |
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306 ngx_chain_t *request_bufs; |
479 | 307 |
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308 ngx_output_chain_ctx_t output; |
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309 ngx_chain_writer_ctx_t writer; |
479 | 310 |
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311 ngx_http_upstream_conf_t *conf; |
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312 #if (NGX_HTTP_CACHE) |
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313 ngx_array_t *caches; |
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314 #endif |
479 | 315 |
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316 ngx_http_upstream_headers_in_t headers_in; |
509 | 317 |
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318 ngx_http_upstream_resolved_t *resolved; |
1658 | 319 |
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320 ngx_buf_t from_client; |
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321 |
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322 ngx_buf_t buffer; |
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323 off_t length; |
581 | 324 |
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325 ngx_chain_t *out_bufs; |
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326 ngx_chain_t *busy_bufs; |
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327 ngx_chain_t *free_bufs; |
581 | 328 |
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329 ngx_int_t (*input_filter_init)(void *data); |
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330 ngx_int_t (*input_filter)(void *data, ssize_t bytes); |
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331 void *input_filter_ctx; |
479 | 332 |
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333 #if (NGX_HTTP_CACHE) |
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334 ngx_int_t (*create_key)(ngx_http_request_t *r); |
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335 #endif |
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336 ngx_int_t (*create_request)(ngx_http_request_t *r); |
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337 ngx_int_t (*reinit_request)(ngx_http_request_t *r); |
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338 ngx_int_t (*process_header)(ngx_http_request_t *r); |
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339 void (*abort_request)(ngx_http_request_t *r); |
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340 void (*finalize_request)(ngx_http_request_t *r, |
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341 ngx_int_t rc); |
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342 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r, |
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343 ngx_table_elt_t *h, size_t prefix); |
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344 ngx_int_t (*rewrite_cookie)(ngx_http_request_t *r, |
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345 ngx_table_elt_t *h); |
479 | 346 |
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347 ngx_msec_t timeout; |
527 | 348 |
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349 ngx_http_upstream_state_t *state; |
479 | 350 |
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351 ngx_str_t method; |
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352 ngx_str_t schema; |
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353 ngx_str_t uri; |
555 | 354 |
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355 #if (NGX_HTTP_SSL) |
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356 ngx_str_t ssl_name; |
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357 #endif |
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358 |
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359 ngx_http_cleanup_pt *cleanup; |
569 | 360 |
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361 unsigned store:1; |
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362 unsigned cacheable:1; |
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363 unsigned accel:1; |
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364 unsigned ssl:1; |
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365 #if (NGX_HTTP_CACHE) |
2952 | 366 unsigned cache_status:3; |
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367 #endif |
479 | 368 |
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369 unsigned buffering:1; |
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370 unsigned keepalive:1; |
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371 unsigned upgrade:1; |
649 | 372 |
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373 unsigned request_sent:1; |
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374 unsigned request_body_sent:1; |
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375 unsigned header_sent:1; |
479 | 376 }; |
377 | |
378 | |
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379 typedef struct { |
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380 ngx_uint_t status; |
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381 ngx_uint_t mask; |
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382 } ngx_http_upstream_next_t; |
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383 |
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384 |
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385 typedef struct { |
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386 ngx_str_t key; |
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387 ngx_str_t value; |
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388 ngx_uint_t skip_empty; |
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389 } ngx_http_upstream_param_t; |
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390 |
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391 |
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392 ngx_int_t ngx_http_upstream_cookie_variable(ngx_http_request_t *r, |
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393 ngx_http_variable_value_t *v, uintptr_t data); |
1162 | 394 ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r, |
395 ngx_http_variable_value_t *v, uintptr_t data); | |
396 | |
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397 ngx_int_t ngx_http_upstream_create(ngx_http_request_t *r); |
479 | 398 void ngx_http_upstream_init(ngx_http_request_t *r); |
651 | 399 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf, |
884 | 400 ngx_url_t *u, ngx_uint_t flags); |
3399 | 401 char *ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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402 void *conf); |
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403 char *ngx_http_upstream_param_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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404 void *conf); |
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405 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf, |
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406 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev, |
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407 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash); |
884 | 408 |
409 | |
410 #define ngx_http_conf_upstream_srv_conf(uscf, module) \ | |
411 uscf->srv_conf[module.ctx_index] | |
509 | 412 |
479 | 413 |
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414 extern ngx_module_t ngx_http_upstream_module; |
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415 extern ngx_conf_bitmask_t ngx_http_upstream_cache_method_mask[]; |
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416 extern ngx_conf_bitmask_t ngx_http_upstream_ignore_headers_masks[]; |
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417 |
479 | 418 |
419 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */ |