Mercurial > hg > nginx
annotate src/http/ngx_http_upstream.h @ 9268:6a3ee145d0b5
Core: made it possible to disable PID files with "pid off".
While it is not generally recommended, this might be beneficial in some
configurations, such as with immutable images and direct control by
a service manager.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 13 May 2024 06:13:03 +0300 |
parents | 0784ab86ad08 |
children | 8cdab3d89c44 |
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_HTTP_429 0x00000400 |
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30 #define NGX_HTTP_UPSTREAM_FT_UPDATING 0x00000800 |
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31 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x00001000 |
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32 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x00002000 |
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33 #define NGX_HTTP_UPSTREAM_FT_NON_IDEMPOTENT 0x00004000 |
1378 | 34 #define NGX_HTTP_UPSTREAM_FT_NOLIVE 0x40000000 |
665 | 35 #define NGX_HTTP_UPSTREAM_FT_OFF 0x80000000 |
479 | 36 |
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37 #define NGX_HTTP_UPSTREAM_FT_STATUS (NGX_HTTP_UPSTREAM_FT_HTTP_500 \ |
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38 |NGX_HTTP_UPSTREAM_FT_HTTP_502 \ |
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39 |NGX_HTTP_UPSTREAM_FT_HTTP_503 \ |
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40 |NGX_HTTP_UPSTREAM_FT_HTTP_504 \ |
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41 |NGX_HTTP_UPSTREAM_FT_HTTP_403 \ |
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42 |NGX_HTTP_UPSTREAM_FT_HTTP_404 \ |
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43 |NGX_HTTP_UPSTREAM_FT_HTTP_429) |
479 | 44 |
45 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40 | |
46 | |
47 | |
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48 #define NGX_HTTP_UPSTREAM_IGN_XA_REDIRECT 0x00000002 |
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49 #define NGX_HTTP_UPSTREAM_IGN_XA_EXPIRES 0x00000004 |
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50 #define NGX_HTTP_UPSTREAM_IGN_EXPIRES 0x00000008 |
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51 #define NGX_HTTP_UPSTREAM_IGN_CACHE_CONTROL 0x00000010 |
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52 #define NGX_HTTP_UPSTREAM_IGN_SET_COOKIE 0x00000020 |
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53 #define NGX_HTTP_UPSTREAM_IGN_XA_LIMIT_RATE 0x00000040 |
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54 #define NGX_HTTP_UPSTREAM_IGN_XA_BUFFERING 0x00000080 |
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55 #define NGX_HTTP_UPSTREAM_IGN_XA_CHARSET 0x00000100 |
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56 #define NGX_HTTP_UPSTREAM_IGN_VARY 0x00000200 |
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57 |
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58 |
479 | 59 typedef struct { |
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60 ngx_uint_t status; |
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61 ngx_msec_t response_time; |
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62 ngx_msec_t connect_time; |
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63 ngx_msec_t header_time; |
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64 ngx_msec_t queue_time; |
3795 | 65 off_t response_length; |
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66 off_t bytes_received; |
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67 off_t bytes_sent; |
563 | 68 |
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69 ngx_str_t *peer; |
479 | 70 } ngx_http_upstream_state_t; |
71 | |
72 | |
73 typedef struct { | |
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74 ngx_hash_t headers_in_hash; |
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75 ngx_array_t upstreams; |
884 | 76 /* ngx_http_upstream_srv_conf_t */ |
509 | 77 } ngx_http_upstream_main_conf_t; |
78 | |
884 | 79 typedef struct ngx_http_upstream_srv_conf_s ngx_http_upstream_srv_conf_t; |
80 | |
81 typedef ngx_int_t (*ngx_http_upstream_init_pt)(ngx_conf_t *cf, | |
82 ngx_http_upstream_srv_conf_t *us); | |
83 typedef ngx_int_t (*ngx_http_upstream_init_peer_pt)(ngx_http_request_t *r, | |
84 ngx_http_upstream_srv_conf_t *us); | |
85 | |
86 | |
87 typedef struct { | |
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88 ngx_http_upstream_init_pt init_upstream; |
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89 ngx_http_upstream_init_peer_pt init; |
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90 void *data; |
884 | 91 } ngx_http_upstream_peer_t; |
92 | |
509 | 93 |
94 typedef struct { | |
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95 ngx_str_t name; |
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96 ngx_addr_t *addrs; |
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97 ngx_uint_t naddrs; |
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98 ngx_uint_t weight; |
6705 | 99 ngx_uint_t max_conns; |
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100 ngx_uint_t max_fails; |
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101 time_t fail_timeout; |
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102 ngx_msec_t slow_start; |
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103 ngx_uint_t down; |
884 | 104 |
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105 unsigned backup:1; |
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106 |
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107 NGX_COMPAT_BEGIN(6) |
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108 NGX_COMPAT_END |
884 | 109 } ngx_http_upstream_server_t; |
110 | |
651 | 111 |
884 | 112 #define NGX_HTTP_UPSTREAM_CREATE 0x0001 |
113 #define NGX_HTTP_UPSTREAM_WEIGHT 0x0002 | |
114 #define NGX_HTTP_UPSTREAM_MAX_FAILS 0x0004 | |
115 #define NGX_HTTP_UPSTREAM_FAIL_TIMEOUT 0x0008 | |
116 #define NGX_HTTP_UPSTREAM_DOWN 0x0010 | |
117 #define NGX_HTTP_UPSTREAM_BACKUP 0x0020 | |
6705 | 118 #define NGX_HTTP_UPSTREAM_MAX_CONNS 0x0100 |
884 | 119 |
651 | 120 |
884 | 121 struct ngx_http_upstream_srv_conf_s { |
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122 ngx_http_upstream_peer_t peer; |
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123 void **srv_conf; |
884 | 124 |
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125 ngx_array_t *servers; /* ngx_http_upstream_server_t */ |
884 | 126 |
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127 ngx_uint_t flags; |
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128 ngx_str_t host; |
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129 u_char *file_name; |
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130 ngx_uint_t line; |
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131 in_port_t port; |
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132 ngx_uint_t no_port; /* unsigned no_port:1 */ |
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133 |
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134 #if (NGX_HTTP_UPSTREAM_ZONE) |
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135 ngx_shm_zone_t *shm_zone; |
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136 #endif |
884 | 137 }; |
651 | 138 |
139 | |
140 typedef struct { | |
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141 ngx_addr_t *addr; |
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142 ngx_http_complex_value_t *value; |
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143 #if (NGX_HAVE_TRANSPARENT_PROXY) |
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144 ngx_uint_t transparent; /* unsigned transparent:1; */ |
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145 #endif |
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146 } ngx_http_upstream_local_t; |
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147 |
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148 |
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149 typedef struct { |
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150 ngx_http_upstream_srv_conf_t *upstream; |
884 | 151 |
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152 ngx_msec_t connect_timeout; |
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153 ngx_msec_t send_timeout; |
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154 ngx_msec_t read_timeout; |
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155 ngx_msec_t next_upstream_timeout; |
479 | 156 |
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157 size_t send_lowat; |
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158 size_t buffer_size; |
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159 size_t limit_rate; |
529 | 160 |
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161 size_t busy_buffers_size; |
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162 size_t max_temp_file_size; |
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163 size_t temp_file_write_size; |
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164 |
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165 size_t busy_buffers_size_conf; |
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166 size_t max_temp_file_size_conf; |
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167 size_t temp_file_write_size_conf; |
509 | 168 |
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169 ngx_bufs_t bufs; |
529 | 170 |
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171 ngx_uint_t ignore_headers; |
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172 ngx_uint_t next_upstream; |
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173 ngx_uint_t store_access; |
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174 ngx_uint_t next_upstream_tries; |
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175 ngx_flag_t buffering; |
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diff
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|
176 ngx_flag_t request_buffering; |
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177 ngx_flag_t pass_request_headers; |
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178 ngx_flag_t pass_request_body; |
479 | 179 |
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180 ngx_flag_t ignore_client_abort; |
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181 ngx_flag_t intercept_errors; |
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diff
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182 ngx_flag_t cyclic_temp_file; |
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Upstream: proxy_force_ranges and friends.
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183 ngx_flag_t force_ranges; |
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184 |
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185 ngx_path_t *temp_path; |
479 | 186 |
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187 ngx_hash_t hide_headers_hash; |
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188 ngx_array_t *hide_headers; |
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189 ngx_array_t *pass_headers; |
509 | 190 |
5008
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Fixed and improved the "*_bind" directives of proxying modules.
Ruslan Ermilov <ru@nginx.com>
parents:
5005
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191 ngx_http_upstream_local_t *local; |
7371
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Upstream: proxy_socket_keepalive and friends.
Vladimir Homutov <vl@nginx.com>
parents:
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changeset
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192 ngx_flag_t socket_keepalive; |
3271
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proxy_bind, fastcgi_bind, and memcached_bind
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193 |
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194 #if (NGX_HTTP_CACHE) |
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parents:
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195 ngx_shm_zone_t *cache_zone; |
5951
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196 ngx_http_complex_value_t *cache_value; |
479 | 197 |
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198 ngx_uint_t cache_min_uses; |
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199 ngx_uint_t cache_use_stale; |
2875
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proxy_cache_methods and fastcgi_cache_methods
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parents:
2786
diff
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200 ngx_uint_t cache_methods; |
479 | 201 |
6793
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Cache: proxy_cache_max_range_offset and friends.
Dmitry Volyntsev <xeioex@nginx.com>
parents:
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202 off_t cache_max_range_offset; |
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Cache: proxy_cache_max_range_offset and friends.
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203 |
4385
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204 ngx_flag_t cache_lock; |
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205 ngx_msec_t cache_lock_timeout; |
5905
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Cache: proxy_cache_lock_age and friends.
Roman Arutyunyan <arut@nginx.com>
parents:
5883
diff
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206 ngx_msec_t cache_lock_age; |
4385
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207 |
5441
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Upstream: cache revalidation with conditional requests.
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208 ngx_flag_t cache_revalidate; |
6290
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Upstream: proxy_cache_convert_head directive.
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209 ngx_flag_t cache_convert_head; |
6906
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Upstream: proxy_cache_background_update and friends.
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210 ngx_flag_t cache_background_update; |
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211 |
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212 ngx_array_t *cache_valid; |
3699
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proxy_cache_pass, fastcgi_cache_bypass, uwsgi_cache_bypass, scgi_cache_bypass
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parents:
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diff
changeset
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213 ngx_array_t *cache_bypass; |
6709
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Modules compatibility: cache purge fields.
Maxim Dounin <mdounin@mdounin.ru>
parents:
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diff
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214 ngx_array_t *cache_purge; |
3699
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proxy_cache_pass, fastcgi_cache_bypass, uwsgi_cache_bypass, scgi_cache_bypass
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215 ngx_array_t *no_cache; |
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216 #endif |
509 | 217 |
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218 ngx_array_t *store_lengths; |
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219 ngx_array_t *store_values; |
1295
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220 |
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221 #if (NGX_HTTP_CACHE) |
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222 signed cache:2; |
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223 #endif |
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224 signed store:2; |
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225 unsigned intercept_404:1; |
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226 unsigned change_buffering:1; |
7230
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Upstream: trailers support, u->conf->pass_trailers flag.
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227 unsigned pass_trailers:1; |
7232
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Upstream: u->conf->preserve_output flag.
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228 unsigned preserve_output:1; |
581 | 229 |
6735
e38e9c50a40e
Modules compatibility: compatibility with NGX_HTTP_SSL.
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230 #if (NGX_HTTP_SSL || NGX_COMPAT) |
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231 ngx_ssl_t *ssl; |
2754 | 232 ngx_flag_t ssl_session_reuse; |
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Upstream: proxy_ssl_name and proxy_ssl_server_name directives.
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233 |
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Upstream: proxy_ssl_name and proxy_ssl_server_name directives.
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234 ngx_http_complex_value_t *ssl_name; |
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Upstream: proxy_ssl_name and proxy_ssl_server_name directives.
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235 ngx_flag_t ssl_server_name; |
5661
060c2e692b96
Upstream: proxy_ssl_verify and friends.
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236 ngx_flag_t ssl_verify; |
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Upstream: variables support in certificates.
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237 |
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|
238 ngx_http_complex_value_t *ssl_certificate; |
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Upstream: variables support in certificates.
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239 ngx_http_complex_value_t *ssl_certificate_key; |
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Upstream: variables support in certificates.
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240 ngx_array_t *ssl_passwords; |
577 | 241 #endif |
242 | |
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update r3945 with more descriptive error message
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243 ngx_str_t module; |
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Introduced the NGX_COMPAT macro.
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244 |
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245 NGX_COMPAT_BEGIN(2) |
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Introduced the NGX_COMPAT macro.
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246 NGX_COMPAT_END |
479 | 247 } ngx_http_upstream_conf_t; |
248 | |
249 | |
509 | 250 typedef struct { |
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251 ngx_str_t name; |
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252 ngx_http_header_handler_pt handler; |
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253 ngx_uint_t offset; |
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254 ngx_http_header_handler_pt copy_handler; |
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255 ngx_uint_t conf; |
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256 ngx_uint_t redirect; /* unsigned redirect:1; */ |
509 | 257 } ngx_http_upstream_header_t; |
258 | |
259 | |
260 typedef struct { | |
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261 ngx_list_t headers; |
7230
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Upstream: trailers support, u->conf->pass_trailers flag.
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|
262 ngx_list_t trailers; |
509 | 263 |
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264 ngx_uint_t status_n; |
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265 ngx_str_t status_line; |
529 | 266 |
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267 ngx_table_elt_t *status; |
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268 ngx_table_elt_t *date; |
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|
269 ngx_table_elt_t *server; |
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270 ngx_table_elt_t *connection; |
509 | 271 |
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272 ngx_table_elt_t *expires; |
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273 ngx_table_elt_t *etag; |
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274 ngx_table_elt_t *x_accel_expires; |
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275 ngx_table_elt_t *x_accel_redirect; |
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276 ngx_table_elt_t *x_accel_limit_rate; |
509 | 277 |
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278 ngx_table_elt_t *content_type; |
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279 ngx_table_elt_t *content_length; |
509 | 280 |
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281 ngx_table_elt_t *last_modified; |
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|
282 ngx_table_elt_t *location; |
8034
413dbda22f7d
Upstream: duplicate headers ignored or properly linked.
Maxim Dounin <mdounin@mdounin.ru>
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|
283 ngx_table_elt_t *refresh; |
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284 ngx_table_elt_t *www_authenticate; |
4123
0ee350b5177c
Upstream: Transfer-Encoding header processing.
Maxim Dounin <mdounin@mdounin.ru>
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4120
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|
285 ngx_table_elt_t *transfer_encoding; |
5877
60fde1bc7236
Cache: disable caching of responses with Vary (ticket #118).
Maxim Dounin <mdounin@mdounin.ru>
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5874
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|
286 ngx_table_elt_t *vary; |
509 | 287 |
8024
ef6a3a99a81a
Reworked multi headers to use linked lists.
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|
288 ngx_table_elt_t *cache_control; |
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Reworked multi headers to use linked lists.
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289 ngx_table_elt_t *set_cookie; |
4123
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Upstream: Transfer-Encoding header processing.
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|
290 |
5732
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Upstream: fixed cache revalidation with SSI.
Maxim Dounin <mdounin@mdounin.ru>
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diff
changeset
|
291 off_t content_length_n; |
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Upstream: fixed cache revalidation with SSI.
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|
292 time_t last_modified_time; |
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Upstream: fixed cache revalidation with SSI.
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diff
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|
293 |
4124
0c30976f5bfa
Upstream: Connection header processing.
Maxim Dounin <mdounin@mdounin.ru>
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4123
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|
294 unsigned connection_close:1; |
4123
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|
295 unsigned chunked:1; |
8041
0784ab86ad08
Upstream: fixed X-Accel-Expires/Cache-Control/Expires handling.
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296 unsigned no_cache:1; |
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Upstream: fixed X-Accel-Expires/Cache-Control/Expires handling.
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|
297 unsigned expired:1; |
509 | 298 } ngx_http_upstream_headers_in_t; |
299 | |
479 | 300 |
1658 | 301 typedef struct { |
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302 ngx_str_t host; |
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303 in_port_t port; |
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|
304 ngx_uint_t no_port; /* unsigned no_port:1 */ |
2422
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variable support for unix sockets in fastcgi_pass and proxy_pass
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|
305 |
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306 ngx_uint_t naddrs; |
6458
384154fc634f
Resolver: added support for SRV records.
Dmitry Volyntsev <xeioex@nginx.com>
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|
307 ngx_resolver_addr_t *addrs; |
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308 |
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309 struct sockaddr *sockaddr; |
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310 socklen_t socklen; |
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311 ngx_str_t name; |
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312 |
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313 ngx_resolver_ctx_t *ctx; |
1658 | 314 } ngx_http_upstream_resolved_t; |
315 | |
316 | |
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317 typedef void (*ngx_http_upstream_handler_pt)(ngx_http_request_t *r, |
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318 ngx_http_upstream_t *u); |
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319 |
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320 |
479 | 321 struct ngx_http_upstream_s { |
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322 ngx_http_upstream_handler_pt read_event_handler; |
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323 ngx_http_upstream_handler_pt write_event_handler; |
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324 |
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325 ngx_peer_connection_t peer; |
479 | 326 |
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327 ngx_event_pipe_t *pipe; |
479 | 328 |
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329 ngx_chain_t *request_bufs; |
479 | 330 |
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331 ngx_output_chain_ctx_t output; |
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332 ngx_chain_writer_ctx_t writer; |
479 | 333 |
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334 ngx_http_upstream_conf_t *conf; |
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335 ngx_http_upstream_srv_conf_t *upstream; |
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336 #if (NGX_HTTP_CACHE) |
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337 ngx_array_t *caches; |
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338 #endif |
479 | 339 |
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340 ngx_http_upstream_headers_in_t headers_in; |
509 | 341 |
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342 ngx_http_upstream_resolved_t *resolved; |
1658 | 343 |
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344 ngx_buf_t from_client; |
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345 |
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346 ngx_buf_t buffer; |
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347 off_t length; |
581 | 348 |
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349 ngx_chain_t *out_bufs; |
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350 ngx_chain_t *busy_bufs; |
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351 ngx_chain_t *free_bufs; |
581 | 352 |
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353 ngx_int_t (*input_filter_init)(void *data); |
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354 ngx_int_t (*input_filter)(void *data, ssize_t bytes); |
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355 void *input_filter_ctx; |
479 | 356 |
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357 #if (NGX_HTTP_CACHE) |
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358 ngx_int_t (*create_key)(ngx_http_request_t *r); |
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359 #endif |
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360 ngx_int_t (*create_request)(ngx_http_request_t *r); |
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361 ngx_int_t (*reinit_request)(ngx_http_request_t *r); |
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362 ngx_int_t (*process_header)(ngx_http_request_t *r); |
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363 void (*abort_request)(ngx_http_request_t *r); |
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364 void (*finalize_request)(ngx_http_request_t *r, |
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365 ngx_int_t rc); |
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366 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r, |
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367 ngx_table_elt_t *h, size_t prefix); |
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368 ngx_int_t (*rewrite_cookie)(ngx_http_request_t *r, |
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369 ngx_table_elt_t *h); |
479 | 370 |
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371 ngx_msec_t start_time; |
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372 |
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373 ngx_http_upstream_state_t *state; |
479 | 374 |
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375 ngx_str_t method; |
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376 ngx_str_t schema; |
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377 ngx_str_t uri; |
555 | 378 |
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379 #if (NGX_HTTP_SSL || NGX_COMPAT) |
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380 ngx_str_t ssl_name; |
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381 #endif |
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382 |
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383 ngx_http_cleanup_pt *cleanup; |
569 | 384 |
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385 unsigned store:1; |
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386 unsigned cacheable:1; |
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387 unsigned accel:1; |
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388 unsigned ssl:1; |
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389 #if (NGX_HTTP_CACHE) |
2952 | 390 unsigned cache_status:3; |
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391 #endif |
479 | 392 |
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393 unsigned buffering:1; |
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394 unsigned keepalive:1; |
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395 unsigned upgrade:1; |
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396 unsigned error:1; |
649 | 397 |
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398 unsigned request_sent:1; |
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399 unsigned request_body_sent:1; |
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400 unsigned request_body_blocked:1; |
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401 unsigned header_sent:1; |
479 | 402 }; |
403 | |
404 | |
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405 typedef struct { |
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406 ngx_uint_t status; |
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407 ngx_uint_t mask; |
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408 } ngx_http_upstream_next_t; |
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409 |
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410 |
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411 typedef struct { |
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412 ngx_str_t key; |
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413 ngx_str_t value; |
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414 ngx_uint_t skip_empty; |
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415 } ngx_http_upstream_param_t; |
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416 |
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417 |
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418 ngx_int_t ngx_http_upstream_create(ngx_http_request_t *r); |
479 | 419 void ngx_http_upstream_init(ngx_http_request_t *r); |
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420 ngx_int_t ngx_http_upstream_non_buffered_filter_init(void *data); |
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421 ngx_int_t ngx_http_upstream_non_buffered_filter(void *data, ssize_t bytes); |
651 | 422 ngx_http_upstream_srv_conf_t *ngx_http_upstream_add(ngx_conf_t *cf, |
884 | 423 ngx_url_t *u, ngx_uint_t flags); |
3399 | 424 char *ngx_http_upstream_bind_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
3271
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425 void *conf); |
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426 char *ngx_http_upstream_param_set_slot(ngx_conf_t *cf, ngx_command_t *cmd, |
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427 void *conf); |
1701
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428 ngx_int_t ngx_http_upstream_hide_headers_hash(ngx_conf_t *cf, |
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429 ngx_http_upstream_conf_t *conf, ngx_http_upstream_conf_t *prev, |
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430 ngx_str_t *default_hide_headers, ngx_hash_init_t *hash); |
884 | 431 |
432 | |
433 #define ngx_http_conf_upstream_srv_conf(uscf, module) \ | |
434 uscf->srv_conf[module.ctx_index] | |
509 | 435 |
479 | 436 |
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437 extern ngx_module_t ngx_http_upstream_module; |
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438 extern ngx_conf_bitmask_t ngx_http_upstream_cache_method_mask[]; |
3667
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439 extern ngx_conf_bitmask_t ngx_http_upstream_ignore_headers_masks[]; |
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440 |
479 | 441 |
442 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */ |