Mercurial > hg > nginx
annotate src/http/modules/ngx_http_static_module.c @ 3440:88741ec7731a stable-0.7
merge r3294, r3305:
Fix a bug introduced in r2032: After a child process has read a terminate
message from a channel, the process tries to read the channel again.
The kernel (at least FreeBSD) may preempt the process and sends a SIGIO
signal to a master process. The master process sends a new terminate message,
the kernel switches again to the the child process, and the child process
reads the messages instead of an EAGAIN error. And this may repeat over
and over. Being that the child process can not exit the cycle and test
the termination flag set by the message handler.
The fix disallow the master process to send a new terminate message on
SIGIO signal reception. It may send the message only on SIGALARM signal.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Mon, 01 Feb 2010 15:49:36 +0000 |
parents | 09cab3f8d92e |
children | 975f0558aab3 8944c3e318ab |
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 |
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4 */ |
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7 #include <ngx_config.h> |
87
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8 #include <ngx_core.h> |
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9 #include <ngx_http.h> |
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12 static ngx_int_t ngx_http_static_handler(ngx_http_request_t *r); |
681 | 13 static ngx_int_t ngx_http_static_init(ngx_conf_t *cf); |
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14 |
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15 |
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16 ngx_http_module_t ngx_http_static_module_ctx = { |
509 | 17 NULL, /* preconfiguration */ |
681 | 18 ngx_http_static_init, /* postconfiguration */ |
177
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19 |
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20 NULL, /* create main configuration */ |
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21 NULL, /* init main configuration */ |
577 | 22 |
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23 NULL, /* create server configuration */ |
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24 NULL, /* merge server configuration */ |
577 | 25 |
1454 | 26 NULL, /* create location configuration */ |
27 NULL /* merge location configuration */ | |
577 | 28 }; |
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29 |
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30 |
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31 ngx_module_t ngx_http_static_module = { |
509 | 32 NGX_MODULE_V1, |
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33 &ngx_http_static_module_ctx, /* module context */ |
1454 | 34 NULL, /* module directives */ |
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35 NGX_HTTP_MODULE, /* module type */ |
541 | 36 NULL, /* init master */ |
681 | 37 NULL, /* init module */ |
541 | 38 NULL, /* init process */ |
39 NULL, /* init thread */ | |
40 NULL, /* exit thread */ | |
41 NULL, /* exit process */ | |
42 NULL, /* exit master */ | |
43 NGX_MODULE_V1_PADDING | |
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44 }; |
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45 |
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46 |
509 | 47 static ngx_int_t |
48 ngx_http_static_handler(ngx_http_request_t *r) | |
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49 { |
557 | 50 u_char *last, *location; |
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51 size_t root, len; |
1454 | 52 ngx_str_t path; |
557 | 53 ngx_int_t rc; |
54 ngx_uint_t level; | |
55 ngx_log_t *log; | |
56 ngx_buf_t *b; | |
57 ngx_chain_t out; | |
1454 | 58 ngx_open_file_info_t of; |
557 | 59 ngx_http_core_loc_conf_t *clcf; |
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60 |
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61 if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD|NGX_HTTP_POST))) { |
639 | 62 return NGX_HTTP_NOT_ALLOWED; |
63 } | |
64 | |
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65 if (r->uri.data[r->uri.len - 1] == '/') { |
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66 return NGX_DECLINED; |
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67 } |
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68 |
489 | 69 if (r->zero_in_uri) { |
70 return NGX_DECLINED; | |
71 } | |
72 | |
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73 log = r->connection->log; |
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74 |
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75 /* |
557 | 76 * ngx_http_map_uri_to_path() allocates memory for terminating '\0' |
77 * so we do not need to reserve memory for '/' for possible redirect | |
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78 */ |
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79 |
773 | 80 last = ngx_http_map_uri_to_path(r, &path, &root, 0); |
557 | 81 if (last == NULL) { |
82 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
400
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83 } |
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84 |
1454 | 85 path.len = last - path.data; |
86 | |
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87 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, |
557 | 88 "http filename: \"%s\"", path.data); |
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89 |
1454 | 90 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module); |
563 | 91 |
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92 ngx_memzero(&of, sizeof(ngx_open_file_info_t)); |
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93 |
2129 | 94 of.directio = clcf->directio; |
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95 of.valid = clcf->open_file_cache_valid; |
1772 | 96 of.min_uses = clcf->open_file_cache_min_uses; |
1454 | 97 of.errors = clcf->open_file_cache_errors; |
1457 | 98 of.events = clcf->open_file_cache_events; |
1454 | 99 |
1799 | 100 if (ngx_open_cached_file(clcf->open_file_cache, &path, &of, r->pool) |
101 != NGX_OK) | |
102 { | |
1454 | 103 switch (of.err) { |
104 | |
105 case 0: | |
106 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
148
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107 |
1454 | 108 case NGX_ENOENT: |
109 case NGX_ENOTDIR: | |
110 case NGX_ENAMETOOLONG: | |
111 | |
170
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112 level = NGX_LOG_ERR; |
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113 rc = NGX_HTTP_NOT_FOUND; |
1454 | 114 break; |
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115 |
1454 | 116 case NGX_EACCES: |
117 | |
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118 level = NGX_LOG_ERR; |
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119 rc = NGX_HTTP_FORBIDDEN; |
1454 | 120 break; |
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121 |
1454 | 122 default: |
123 | |
170
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124 level = NGX_LOG_CRIT; |
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125 rc = NGX_HTTP_INTERNAL_SERVER_ERROR; |
1454 | 126 break; |
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127 } |
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128 |
527 | 129 if (rc != NGX_HTTP_NOT_FOUND || clcf->log_not_found) { |
1454 | 130 ngx_log_error(level, log, of.err, |
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131 "%s \"%s\" failed", of.failed, path.data); |
527 | 132 } |
170
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133 |
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134 return rc; |
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135 } |
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136 |
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137 r->root_tested = !r->error_page; |
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138 |
1696 | 139 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, log, 0, "http static fd: %d", of.fd); |
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140 |
1454 | 141 if (of.is_dir) { |
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142 |
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143 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, log, 0, "http dir"); |
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144 |
509 | 145 r->headers_out.location = ngx_palloc(r->pool, sizeof(ngx_table_elt_t)); |
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146 if (r->headers_out.location == NULL) { |
165
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147 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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148 } |
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149 |
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150 len = r->uri.len + 1; |
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151 |
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152 if (!clcf->alias && clcf->root_lengths == NULL && r->args.len == 0) { |
557 | 153 location = path.data + clcf->root.len; |
154 | |
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155 *last = '/'; |
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156 |
557 | 157 } else { |
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158 if (r->args.len) { |
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159 len += r->args.len + 1; |
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160 } |
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161 |
2049 | 162 location = ngx_pnalloc(r->pool, len); |
557 | 163 if (location == NULL) { |
164 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
165 } | |
166 | |
573 | 167 last = ngx_copy(location, r->uri.data, r->uri.len); |
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168 |
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169 *last = '/'; |
557 | 170 |
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171 if (r->args.len) { |
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172 *++last = '?'; |
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173 ngx_memcpy(++last, r->args.data, r->args.len); |
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174 } |
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175 } |
557 | 176 |
509 | 177 /* |
178 * we do not need to set the r->headers_out.location->hash and | |
179 * r->headers_out.location->key fields | |
180 */ | |
201
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181 |
2038
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182 r->headers_out.location->value.len = len; |
557 | 183 r->headers_out.location->value.data = location; |
287
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184 |
148
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185 return NGX_HTTP_MOVED_PERMANENTLY; |
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186 } |
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187 |
461 | 188 #if !(NGX_WIN32) /* the not regular files are probably Unix specific */ |
176
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189 |
1454 | 190 if (!of.is_file) { |
201
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191 ngx_log_error(NGX_LOG_CRIT, log, ngx_errno, |
557 | 192 "\"%s\" is not a regular file", path.data); |
176
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193 |
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194 return NGX_HTTP_NOT_FOUND; |
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195 } |
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196 |
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197 #endif |
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198 |
2182
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199 if (r->method & NGX_HTTP_POST) { |
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200 return NGX_HTTP_NOT_ALLOWED; |
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201 } |
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202 |
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203 rc = ngx_http_discard_request_body(r); |
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204 |
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205 if (rc != NGX_OK) { |
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206 return rc; |
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207 } |
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208 |
509 | 209 log->action = "sending response to client"; |
148
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210 |
201
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211 r->headers_out.status = NGX_HTTP_OK; |
1454 | 212 r->headers_out.content_length_n = of.size; |
213 r->headers_out.last_modified_time = of.mtime; | |
201
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214 |
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215 if (ngx_http_set_content_type(r) != NGX_OK) { |
200
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216 return NGX_HTTP_INTERNAL_SERVER_ERROR; |
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217 } |
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218 |
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219 if (r != r->main && of.size == 0) { |
583 | 220 return ngx_http_send_header(r); |
221 } | |
222 | |
587 | 223 r->allow_ranges = 1; |
224 | |
577 | 225 /* we need to allocate all before the header would be sent */ |
1
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226 |
577 | 227 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t)); |
228 if (b == NULL) { | |
229 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
230 } | |
26
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231 |
577 | 232 b->file = ngx_pcalloc(r->pool, sizeof(ngx_file_t)); |
233 if (b->file == NULL) { | |
234 return NGX_HTTP_INTERNAL_SERVER_ERROR; | |
235 } | |
403
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236 |
96
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237 rc = ngx_http_send_header(r); |
143
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238 |
585 | 239 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) { |
143
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240 return rc; |
99
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241 } |
96
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242 |
343
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243 b->file_pos = 0; |
1454 | 244 b->file_last = of.size; |
1
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245 |
577 | 246 b->in_file = b->file_last ? 1: 0; |
597 | 247 b->last_buf = (r == r->main) ? 1: 0; |
577 | 248 b->last_in_chain = 1; |
249 | |
1696 | 250 b->file->fd = of.fd; |
557 | 251 b->file->name = path; |
343
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252 b->file->log = log; |
2231
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253 b->file->directio = of.is_directio; |
343
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254 |
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255 out.buf = b; |
153
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256 out.next = NULL; |
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257 |
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258 return ngx_http_output_filter(r, &out); |
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259 } |
148
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260 |
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261 |
509 | 262 static ngx_int_t |
681 | 263 ngx_http_static_init(ngx_conf_t *cf) |
148
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264 { |
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265 ngx_http_handler_pt *h; |
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266 ngx_http_core_main_conf_t *cmcf; |
396
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267 |
681 | 268 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module); |
577 | 269 |
501 | 270 h = ngx_array_push(&cmcf->phases[NGX_HTTP_CONTENT_PHASE].handlers); |
201
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271 if (h == NULL) { |
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272 return NGX_ERROR; |
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273 } |
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274 |
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275 *h = ngx_http_static_handler; |
148
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276 |
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277 return NGX_OK; |
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278 } |