annotate src/http/ngx_http_upstream.h @ 573:58475592100c release-0.3.8

nginx-0.3.8-RELEASE import *) Security: nginx now checks URI got from a backend in "X-Accel-Redirect" header line or in SSI file for the "/../" paths and zeroes. *) Change: nginx now does not treat the empty user name in the "Authorization" header line as valid one. *) Feature: the "ssl_session_timeout" directives of the ngx_http_ssl_module and ngx_imap_ssl_module. *) Feature: the "auth_http_header" directive of the ngx_imap_auth_http_module. *) Feature: the "add_header" directive. *) Feature: the ngx_http_realip_module. *) Feature: the new variables to use in the "log_format" directive: $bytes_sent, $apache_bytes_sent, $status, $time_gmt, $uri, $request_time, $request_length, $upstream_status, $upstream_response_time, $gzip_ratio, $uid_got, $uid_set, $connection, $pipe, and $msec. The parameters in the "%name" form will be canceled soon. *) Change: now the false variable values in the "if" directive are the empty string "" and string starting with "0". *) Bugfix: while using proxied or FastCGI-server nginx may leave connections and temporary files with client requests in open state. *) Bugfix: the worker processes did not flush the buffered logs on graceful exit. *) Bugfix: if the request URI was changes by the "rewrite" directive and the request was proxied in location given by regular expression, then the incorrect request was transferred to backend; the bug had appeared in 0.2.6. *) Bugfix: the "expires" directive did not remove the previous "Expires" header. *) Bugfix: nginx may stop to accept requests if the "rtsig" method and several worker processes were used. *) Bugfix: the "\"" and "\'" escape symbols were incorrectly handled in SSI commands. *) Bugfix: if the response was ended just after the SSI command and gzipping was used, then the response did not transferred complete or did not transferred at all.
author Igor Sysoev <igor@sysoev.ru>
date Wed, 09 Nov 2005 17:25:55 +0000
parents 174f1e853e1e
children 4d9ea73a627a
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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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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 ngx_msec_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 ngx_msec_t response_time;
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37
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38 ngx_str_t *peer;
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39 } ngx_http_upstream_state_t;
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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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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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51 ngx_msec_t timeout;
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53 size_t send_lowat;
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54 size_t header_buffer_size;
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56 size_t busy_buffers_size;
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57 size_t max_temp_file_size;
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58 size_t temp_file_write_size;
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60 size_t busy_buffers_size_conf;
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61 size_t max_temp_file_size_conf;
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62 size_t temp_file_write_size_conf;
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63
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64 ngx_uint_t next_upstream;
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65 ngx_uint_t max_fails;
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67 time_t fail_timeout;
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68
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69 ngx_bufs_t bufs;
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71 ngx_flag_t pass_request_headers;
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72 ngx_flag_t pass_request_body;
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73
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74 ngx_flag_t redirect_errors;
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75 ngx_flag_t cyclic_temp_file;
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77 ngx_flag_t pass_x_powered_by;
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78 ngx_flag_t pass_server;
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79 ngx_flag_t pass_date;
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80 ngx_flag_t pass_x_accel_expires;
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82 ngx_path_t *temp_path;
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83
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84 ngx_str_t schema;
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85 ngx_str_t uri;
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86 ngx_str_t location;
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87 ngx_str_t url; /* used in proxy_rewrite_location */
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88 } ngx_http_upstream_conf_t;
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91 typedef struct {
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92 ngx_str_t name;
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93 ngx_http_header_handler_pt handler;
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94 ngx_uint_t offset;
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95 ngx_http_header_handler_pt copy_handler;
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96 ngx_uint_t conf;
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97 ngx_uint_t redirect; /* unsigned redirect:1; */
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98 } ngx_http_upstream_header_t;
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101 typedef struct {
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102 ngx_list_t headers;
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103
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104 ngx_uint_t status_n;
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105 ngx_str_t status_line;
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106
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107 ngx_table_elt_t *status;
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108 ngx_table_elt_t *date;
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109 ngx_table_elt_t *server;
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110 ngx_table_elt_t *connection;
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111
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112 ngx_table_elt_t *expires;
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113 ngx_table_elt_t *etag;
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114 ngx_table_elt_t *x_accel_expires;
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115 ngx_table_elt_t *x_accel_redirect;
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116 ngx_table_elt_t *x_accel_limit_rate;
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117
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118 ngx_table_elt_t *content_type;
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119 ngx_table_elt_t *content_length;
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120
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121 ngx_table_elt_t *last_modified;
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122 ngx_table_elt_t *location;
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123 ngx_table_elt_t *accept_ranges;
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124 ngx_table_elt_t *www_authenticate;
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125
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126 #if (NGX_HTTP_GZIP)
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127 ngx_table_elt_t *content_encoding;
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128 #endif
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129
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130 ngx_array_t cache_control;
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131 } ngx_http_upstream_headers_in_t;
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132
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133
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134 struct ngx_http_upstream_s {
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135 ngx_peer_connection_t peer;
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136
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137 ngx_event_pipe_t pipe;
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138
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139 ngx_chain_t *request_bufs;
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140
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141 ngx_output_chain_ctx_t output;
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142 ngx_chain_writer_ctx_t writer;
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143
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144 ngx_http_upstream_conf_t *conf;
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145
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146 ngx_http_upstream_headers_in_t headers_in;
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147
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148 ngx_buf_t header_in;
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149
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150 ngx_int_t (*create_request)(ngx_http_request_t *r);
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151 ngx_int_t (*reinit_request)(ngx_http_request_t *r);
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152 ngx_int_t (*process_header)(ngx_http_request_t *r);
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153 void (*abort_request)(ngx_http_request_t *r);
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154 void (*finalize_request)(ngx_http_request_t *r,
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155 ngx_int_t rc);
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156 ngx_int_t (*rewrite_redirect)(ngx_http_request_t *r,
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157 ngx_table_elt_t *h, size_t prefix);
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158
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159 ngx_msec_t timeout;
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160
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161 ngx_str_t method;
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162
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163 ngx_http_log_handler_pt saved_log_handler;
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164
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165 ngx_http_upstream_state_t *state;
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166 ngx_array_t states; /* of ngx_http_upstream_state_t */
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167
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168 ngx_str_t uri;
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169
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170 ngx_http_cleanup_pt *cleanup;
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171
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172 unsigned cachable:1;
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173 unsigned accel:1;
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174
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175 unsigned request_sent:1;
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176 unsigned header_sent:1;
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177 };
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178
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179
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180 void ngx_http_upstream_init(ngx_http_request_t *r);
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181
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182
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183 extern ngx_module_t ngx_http_upstream_module;
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184
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185 extern char *ngx_http_upstream_header_errors[];
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186
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187
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188 #endif /* _NGX_HTTP_UPSTREAM_H_INCLUDED_ */