Mercurial > hg > nginx-quic
annotate src/http/ngx_http_copy_filter_module.c @ 6671:6b1b8c4b7a95
Realip: fixed uninitialized memory access.
Previously, the realip module could be left with uninitialized context after an
error in the ngx_http_realip_set_addr() function. That context could be later
accessed by $realip_remote_addr and $realip_remote_port variable handlers.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Thu, 01 Sep 2016 14:33:51 +0300 |
parents | c5f81dcf97a7 |
children | ce37362a7a70 |
rev | line source |
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441
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
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9 #include <ngx_core.h> |
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10 #include <ngx_http.h> |
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12 |
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13 typedef struct { |
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14 ngx_bufs_t bufs; |
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15 } ngx_http_copy_filter_conf_t; |
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17 |
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18 #if (NGX_HAVE_FILE_AIO) |
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19 static void ngx_http_copy_aio_handler(ngx_output_chain_ctx_t *ctx, |
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20 ngx_file_t *file); |
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21 static void ngx_http_copy_aio_event_handler(ngx_event_t *ev); |
3065 | 22 #if (NGX_HAVE_AIO_SENDFILE) |
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23 static ssize_t ngx_http_copy_aio_sendfile_preload(ngx_buf_t *file); |
3065 | 24 static void ngx_http_copy_aio_sendfile_event_handler(ngx_event_t *ev); |
25 #endif | |
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26 #endif |
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27 #if (NGX_THREADS) |
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28 static ngx_int_t ngx_http_copy_thread_handler(ngx_thread_task_t *task, |
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29 ngx_file_t *file); |
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30 static void ngx_http_copy_thread_event_handler(ngx_event_t *ev); |
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31 #endif |
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32 |
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33 static void *ngx_http_copy_filter_create_conf(ngx_conf_t *cf); |
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34 static char *ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, |
501 | 35 void *parent, void *child); |
681 | 36 static ngx_int_t ngx_http_copy_filter_init(ngx_conf_t *cf); |
10
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37 |
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38 |
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39 static ngx_command_t ngx_http_copy_filter_commands[] = { |
10
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40 |
501 | 41 { ngx_string("output_buffers"), |
42 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
43 ngx_conf_set_bufs_slot, | |
44 NGX_HTTP_LOC_CONF_OFFSET, | |
45 offsetof(ngx_http_copy_filter_conf_t, bufs), | |
46 NULL }, | |
10
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47 |
501 | 48 ngx_null_command |
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49 }; |
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50 |
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51 |
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52 static ngx_http_module_t ngx_http_copy_filter_module_ctx = { |
509 | 53 NULL, /* preconfiguration */ |
681 | 54 ngx_http_copy_filter_init, /* postconfiguration */ |
177
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55 |
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56 NULL, /* create main configuration */ |
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57 NULL, /* init main configuration */ |
69
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58 |
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59 NULL, /* create server configuration */ |
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60 NULL, /* merge server configuration */ |
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61 |
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62 ngx_http_copy_filter_create_conf, /* create location configuration */ |
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63 ngx_http_copy_filter_merge_conf /* merge location configuration */ |
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64 }; |
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65 |
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66 |
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67 ngx_module_t ngx_http_copy_filter_module = { |
509 | 68 NGX_MODULE_V1, |
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69 &ngx_http_copy_filter_module_ctx, /* module context */ |
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70 ngx_http_copy_filter_commands, /* module directives */ |
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71 NGX_HTTP_MODULE, /* module type */ |
541 | 72 NULL, /* init master */ |
681 | 73 NULL, /* init module */ |
541 | 74 NULL, /* init process */ |
75 NULL, /* init thread */ | |
76 NULL, /* exit thread */ | |
77 NULL, /* exit process */ | |
78 NULL, /* exit master */ | |
79 NGX_MODULE_V1_PADDING | |
40
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80 }; |
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81 |
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82 |
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83 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; |
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84 |
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85 |
501 | 86 static ngx_int_t |
87 ngx_http_copy_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
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88 { |
583 | 89 ngx_int_t rc; |
90 ngx_connection_t *c; | |
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91 ngx_output_chain_ctx_t *ctx; |
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92 ngx_http_core_loc_conf_t *clcf; |
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93 ngx_http_copy_filter_conf_t *conf; |
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94 |
583 | 95 c = r->connection; |
96 | |
97 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0, | |
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98 "http copy filter: \"%V?%V\"", &r->uri, &r->args); |
509 | 99 |
100 ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module); | |
60
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101 |
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102 if (ctx == NULL) { |
501 | 103 ctx = ngx_pcalloc(r->pool, sizeof(ngx_output_chain_ctx_t)); |
104 if (ctx == NULL) { | |
105 return NGX_ERROR; | |
106 } | |
107 | |
108 ngx_http_set_ctx(r, ctx, ngx_http_copy_filter_module); | |
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109 |
3053 | 110 conf = ngx_http_get_module_loc_conf(r, ngx_http_copy_filter_module); |
111 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); | |
112 | |
583 | 113 ctx->sendfile = c->sendfile; |
513 | 114 ctx->need_in_memory = r->main_filter_need_in_memory |
115 || r->filter_need_in_memory; | |
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116 ctx->need_in_temp = r->filter_need_temporary; |
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117 |
3053 | 118 ctx->alignment = clcf->directio_alignment; |
119 | |
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120 ctx->pool = r->pool; |
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121 ctx->bufs = conf->bufs; |
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122 ctx->tag = (ngx_buf_tag_t) &ngx_http_copy_filter_module; |
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123 |
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124 ctx->output_filter = (ngx_output_chain_filter_pt) |
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125 ngx_http_next_body_filter; |
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126 ctx->filter_ctx = r; |
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127 |
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128 #if (NGX_HAVE_FILE_AIO) |
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129 if (ngx_file_aio && clcf->aio == NGX_HTTP_AIO_ON) { |
6004 | 130 ctx->aio_handler = ngx_http_copy_aio_handler; |
3065 | 131 #if (NGX_HAVE_AIO_SENDFILE) |
6004 | 132 ctx->aio_preload = ngx_http_copy_aio_sendfile_preload; |
3065 | 133 #endif |
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134 } |
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135 #endif |
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136 |
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137 #if (NGX_THREADS) |
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138 if (clcf->aio == NGX_HTTP_AIO_THREADS) { |
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139 ctx->thread_handler = ngx_http_copy_thread_handler; |
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140 } |
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141 #endif |
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142 |
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143 if (in && in->buf && ngx_buf_size(in->buf)) { |
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144 r->request_output = 1; |
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145 } |
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146 } |
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147 |
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148 #if (NGX_HAVE_FILE_AIO || NGX_THREADS) |
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149 ctx->aio = r->aio; |
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150 #endif |
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151 |
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152 rc = ngx_output_chain(ctx, in); |
583 | 153 |
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154 if (ctx->in == NULL) { |
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155 r->buffered &= ~NGX_HTTP_COPY_BUFFERED; |
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156 |
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157 } else { |
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158 r->buffered |= NGX_HTTP_COPY_BUFFERED; |
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159 } |
3065 | 160 |
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161 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, c->log, 0, |
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162 "http copy filter: %i \"%V?%V\"", rc, &r->uri, &r->args); |
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163 |
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164 return rc; |
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165 } |
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166 |
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167 |
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168 #if (NGX_HAVE_FILE_AIO) |
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169 |
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170 static void |
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171 ngx_http_copy_aio_handler(ngx_output_chain_ctx_t *ctx, ngx_file_t *file) |
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172 { |
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173 ngx_http_request_t *r; |
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174 |
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175 r = ctx->filter_ctx; |
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176 |
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177 file->aio->data = r; |
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178 file->aio->handler = ngx_http_copy_aio_event_handler; |
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179 |
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180 r->main->blocked++; |
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181 r->aio = 1; |
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182 ctx->aio = 1; |
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183 } |
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184 |
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185 |
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186 static void |
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187 ngx_http_copy_aio_event_handler(ngx_event_t *ev) |
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188 { |
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189 ngx_event_aio_t *aio; |
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190 ngx_http_request_t *r; |
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191 |
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192 aio = ev->data; |
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193 r = aio->data; |
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194 |
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195 r->main->blocked--; |
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196 r->aio = 0; |
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197 |
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198 r->connection->write->handler(r->connection->write); |
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199 } |
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200 |
3065 | 201 |
202 #if (NGX_HAVE_AIO_SENDFILE) | |
203 | |
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204 static ssize_t |
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205 ngx_http_copy_aio_sendfile_preload(ngx_buf_t *file) |
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206 { |
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207 ssize_t n; |
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208 static u_char buf[1]; |
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209 ngx_event_aio_t *aio; |
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210 ngx_http_request_t *r; |
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211 ngx_output_chain_ctx_t *ctx; |
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212 |
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213 n = ngx_file_aio_read(file->file, buf, 1, file->file_pos, NULL); |
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214 |
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215 if (n == NGX_AGAIN) { |
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216 aio = file->file->aio; |
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217 aio->handler = ngx_http_copy_aio_sendfile_event_handler; |
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218 |
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219 r = aio->data; |
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220 r->main->blocked++; |
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221 r->aio = 1; |
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222 |
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223 ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module); |
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224 ctx->aio = 1; |
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225 } |
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226 |
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227 return n; |
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228 } |
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229 |
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230 |
3065 | 231 static void |
232 ngx_http_copy_aio_sendfile_event_handler(ngx_event_t *ev) | |
233 { | |
234 ngx_event_aio_t *aio; | |
235 ngx_http_request_t *r; | |
236 | |
237 aio = ev->data; | |
238 r = aio->data; | |
239 | |
240 r->main->blocked--; | |
241 r->aio = 0; | |
242 ev->complete = 0; | |
243 | |
244 r->connection->write->handler(r->connection->write); | |
245 } | |
246 | |
247 #endif | |
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248 #endif |
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249 |
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250 |
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251 #if (NGX_THREADS) |
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252 |
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253 static ngx_int_t |
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254 ngx_http_copy_thread_handler(ngx_thread_task_t *task, ngx_file_t *file) |
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255 { |
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256 ngx_str_t name; |
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257 ngx_thread_pool_t *tp; |
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258 ngx_http_request_t *r; |
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259 ngx_output_chain_ctx_t *ctx; |
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260 ngx_http_core_loc_conf_t *clcf; |
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261 |
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262 r = file->thread_ctx; |
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263 |
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264 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
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265 tp = clcf->thread_pool; |
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266 |
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267 if (tp == NULL) { |
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268 if (ngx_http_complex_value(r, clcf->thread_pool_value, &name) |
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269 != NGX_OK) |
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270 { |
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271 return NGX_ERROR; |
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272 } |
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273 |
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274 tp = ngx_thread_pool_get((ngx_cycle_t *) ngx_cycle, &name); |
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275 |
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276 if (tp == NULL) { |
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277 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
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278 "thread pool \"%V\" not found", &name); |
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279 return NGX_ERROR; |
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280 } |
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281 } |
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282 |
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283 task->event.data = r; |
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284 task->event.handler = ngx_http_copy_thread_event_handler; |
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285 |
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286 if (ngx_thread_task_post(tp, task) != NGX_OK) { |
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287 return NGX_ERROR; |
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288 } |
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289 |
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290 r->main->blocked++; |
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291 r->aio = 1; |
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292 |
6423
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293 ctx = ngx_http_get_module_ctx(r, ngx_http_copy_filter_module); |
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294 ctx->aio = 1; |
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295 |
6022
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296 return NGX_OK; |
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297 } |
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298 |
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299 |
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300 static void |
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301 ngx_http_copy_thread_event_handler(ngx_event_t *ev) |
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302 { |
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303 ngx_http_request_t *r; |
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304 |
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305 r = ev->data; |
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306 |
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307 r->main->blocked--; |
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308 r->aio = 0; |
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309 |
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310 r->connection->write->handler(r->connection->write); |
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311 } |
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312 |
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313 #endif |
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314 |
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315 |
501 | 316 static void * |
317 ngx_http_copy_filter_create_conf(ngx_conf_t *cf) | |
9
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318 { |
334
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319 ngx_http_copy_filter_conf_t *conf; |
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320 |
501 | 321 conf = ngx_palloc(cf->pool, sizeof(ngx_http_copy_filter_conf_t)); |
322 if (conf == NULL) { | |
323 return NULL; | |
324 } | |
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325 |
141
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326 conf->bufs.num = 0; |
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327 |
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328 return conf; |
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329 } |
44
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330 |
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331 |
501 | 332 static char * |
333 ngx_http_copy_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
44
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334 { |
334
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335 ngx_http_copy_filter_conf_t *prev = parent; |
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336 ngx_http_copy_filter_conf_t *conf = child; |
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337 |
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338 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, 2, 32768); |
44
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339 |
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340 return NULL; |
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341 } |
334
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342 |
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343 |
501 | 344 static ngx_int_t |
681 | 345 ngx_http_copy_filter_init(ngx_conf_t *cf) |
334
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346 { |
4542
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Local variable "ngx_http_next_filter" renamed to "ngx_http_next_body_filter"
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347 ngx_http_next_body_filter = ngx_http_top_body_filter; |
334
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348 ngx_http_top_body_filter = ngx_http_copy_filter; |
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349 |
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350 return NGX_OK; |
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351 } |
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352 |