annotate src/http/ngx_http_upstream.h @ 58:b55cbf18157e NGINX_0_1_29

nginx 0.1.29 *) Feature: the ngx_http_ssi_module supports "include virtual" command. *) Feature: the ngx_http_ssi_module supports the condition command like 'if expr="$NAME"' and "else" and "endif" commands. Only one nested level is supported. *) Feature: the ngx_http_ssi_module supports the DATE_LOCAL and DATE_GMT variables and "config timefmt" command. *) Feature: the "ssi_ignore_recycled_buffers" directive. *) Bugfix: the "echo" command did not show the default value for the empty QUERY_STRING variable. *) Change: the ngx_http_proxy_module was rewritten. *) Feature: the "proxy_redirect", "proxy_pass_request_headers", "proxy_pass_request_body", and "proxy_method" directives. *) Feature: the "proxy_set_header" directive. The "proxy_x_var" was canceled and must be replaced with the proxy_set_header directive. *) Change: the "proxy_preserve_host" is canceled and must be replaced with the "proxy_set_header Host $host" and the "proxy_redirect off" directives, the "proxy_set_header Host $host:$proxy_port" directive and the appropriate proxy_redirect directives. *) Change: the "proxy_set_x_real_ip" is canceled and must be replaced with the "proxy_set_header X-Real-IP $remote_addr" directive. *) Change: the "proxy_add_x_forwarded_for" is canceled and must be replaced with the "proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for" directive. *) Change: the "proxy_set_x_url" is canceled and must be replaced with the "proxy_set_header X-URL http://$host:$server_port$request_uri" directive. *) Feature: the "fastcgi_param" directive. *) Change: the "fastcgi_root", "fastcgi_set_var" and "fastcgi_params" directive are canceled and must be replaced with the fastcgi_param directives. *) Feature: the "index" directive can use the variables. *) Feature: the "index" directive can be used at http and server levels. *) Change: the last index only in the "index" directive can be absolute. *) Feature: the "rewrite" directive can use the variables. *) Feature: the "internal" directive. *) Feature: the CONTENT_LENGTH, CONTENT_TYPE, REMOTE_PORT, SERVER_ADDR, SERVER_PORT, SERVER_PROTOCOL, DOCUMENT_ROOT, SERVER_NAME, REQUEST_METHOD, REQUEST_URI, and REMOTE_USER variables. *) Change: nginx now passes the invalid lines in a client request headers or a backend response header. *) Bugfix: if the backend did not transfer response for a long time and the "send_timeout" was less than "proxy_read_timeout", then nginx returned the 408 response. *) Bugfix: the segmentation fault was occurred if the backend sent an invalid line in response header; bug appeared in 0.1.26. *) Bugfix: the segmentation fault may occurred in FastCGI fault tolerance configuration. *) Bugfix: the "expires" directive did not remove the previous "Expires" and "Cache-Control" headers. *) Bugfix: nginx did not take into account trailing dot in "Host" header line. *) Bugfix: the ngx_http_auth_module did not work under Linux. *) Bugfix: the rewrite directive worked incorrectly, if the arguments were in a request. *) Bugfix: nginx could not be built on MacOS X.
author Igor Sysoev <http://sysoev.ru>
date Thu, 12 May 2005 00:00:00 +0400
parents 3050baa54a26
children 5db440287648
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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7 #ifndef _NGX_HTTP_UPSTREAM_H_INCLUDED_
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8 #define _NGX_HTTP_UPSTREAM_H_INCLUDED_
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9
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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13 #include <ngx_event.h>
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14 #include <ngx_event_connect.h>
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15 #include <ngx_event_pipe.h>
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16 #include <ngx_http.h>
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19 #define NGX_HTTP_UPSTREAM_FT_ERROR 0x02
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20 #define NGX_HTTP_UPSTREAM_FT_TIMEOUT 0x04
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21 #define NGX_HTTP_UPSTREAM_FT_INVALID_HEADER 0x08
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22 #define NGX_HTTP_UPSTREAM_FT_HTTP_500 0x10
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23 #define NGX_HTTP_UPSTREAM_FT_HTTP_404 0x20
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24 #define NGX_HTTP_UPSTREAM_FT_BUSY_LOCK 0x40
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25 #define NGX_HTTP_UPSTREAM_FT_MAX_WAITING 0x80
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28 #define NGX_HTTP_UPSTREAM_INVALID_HEADER 40
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31 typedef struct {
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32 time_t bl_time;
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33 ngx_uint_t bl_state;
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35 ngx_uint_t status;
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36 time_t time;
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38 ngx_str_t *peer;
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39 } ngx_http_upstream_state_t;
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40
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42 typedef struct {
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43 ngx_hash_t headers_in_hash;
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44 } ngx_http_upstream_main_conf_t;
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45
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47 typedef struct {
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48 ngx_msec_t connect_timeout;
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49 ngx_msec_t send_timeout;
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50 ngx_msec_t read_timeout;
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52 size_t send_lowat;
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53 size_t header_buffer_size;
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54 size_t busy_buffers_size;
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55 size_t max_temp_file_size;
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56 size_t temp_file_write_size;
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57
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58 ngx_uint_t next_upstream;
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59 ngx_uint_t method;
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61 ngx_bufs_t bufs;
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63 ngx_flag_t pass_request_headers;
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64 ngx_flag_t pass_request_body;
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66 ngx_flag_t redirect_errors;
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67 ngx_flag_t pass_unparsed_uri;
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68 ngx_flag_t cyclic_temp_file;
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70 ngx_flag_t pass_x_powered_by;
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71 ngx_flag_t pass_server;
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72 ngx_flag_t pass_date;
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73 ngx_flag_t pass_x_accel_expires;
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75 ngx_path_t *temp_path;
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77 ngx_str_t schema;
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78 ngx_str_t uri;
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79 ngx_str_t *location;
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80 ngx_str_t url; /* used in proxy_rewrite_location */
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81 } ngx_http_upstream_conf_t;
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84 typedef struct {
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85 ngx_str_t name;
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86 ngx_http_header_handler_pt handler;
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87 ngx_uint_t offset;
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88 ngx_http_header_handler_pt copy_handler;
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89 ngx_uint_t conf;
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90 } ngx_http_upstream_header_t;
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93 typedef struct {
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94 ngx_list_t headers;
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95
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96 ngx_table_elt_t *status;
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97 ngx_table_elt_t *date;
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98 ngx_table_elt_t *server;
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99 ngx_table_elt_t *connection;
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101 ngx_table_elt_t *expires;
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102 ngx_table_elt_t *etag;
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103 ngx_table_elt_t *x_accel_expires;
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104
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105 ngx_table_elt_t *content_type;
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106 ngx_table_elt_t *content_length;
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107
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108 ngx_table_elt_t *last_modified;
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109 ngx_table_elt_t *location;
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110 ngx_table_elt_t *accept_ranges;
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111
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112 #if (NGX_HTTP_GZIP)
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113 ngx_table_elt_t *content_encoding;
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114 #endif
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115
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116 ngx_array_t cache_control;
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117 } ngx_http_upstream_headers_in_t;
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118
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120 struct ngx_http_upstream_s {
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121 ngx_http_request_t *request;
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123 ngx_peer_connection_t peer;
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124
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125 ngx_event_pipe_t pipe;
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126
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127 ngx_chain_t *request_bufs;
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128
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129 ngx_output_chain_ctx_t output;
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130 ngx_chain_writer_ctx_t writer;
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131
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132 ngx_http_upstream_conf_t *conf;
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134 ngx_http_upstream_headers_in_t headers_in;
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135
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136 ngx_buf_t header_in;
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137
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138 ngx_int_t (*create_request)(ngx_http_request_t *r);
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139 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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140 ngx_int_t (*process_header)(ngx_http_request_t *r);
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141 void (*abort_request)(ngx_http_request_t *r);
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142 void (*finalize_request)(ngx_http_request_t *r,
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143 ngx_int_t rc);
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144 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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145 ngx_table_elt_t *h, size_t prefix);
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146
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147 ngx_uint_t method;
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148
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149 ngx_http_log_handler_pt saved_log_handler;
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150
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151 ngx_http_upstream_state_t *state;
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152 ngx_array_t states; /* of ngx_http_upstream_state_t */
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153
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154 unsigned cachable:1;
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155 unsigned accel:1;
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156
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157 unsigned request_sent:1;
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158 unsigned header_sent:1;
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159 };
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160
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161
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162 void ngx_http_upstream_init(ngx_http_request_t *r);
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163
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164
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165 extern ngx_module_t ngx_http_upstream_module;
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166
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167 extern char *ngx_http_upstream_header_errors[];
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168
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169
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170 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */