Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_headers_filter_module.c @ 4112:bc0ca958c270
MP4 co64 atom support added.
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 15 Sep 2011 13:23:03 +0000 |
parents | dd1570b6f237 |
children | 59b99f217c6d |
rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 #include <ngx_http.h> |
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10 |
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11 |
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12 typedef struct ngx_http_header_val_s ngx_http_header_val_t; |
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13 |
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14 typedef ngx_int_t (*ngx_http_set_header_pt)(ngx_http_request_t *r, |
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15 ngx_http_header_val_t *hv, ngx_str_t *value); |
625 | 16 |
17 | |
18 typedef struct { | |
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19 ngx_str_t name; |
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20 ngx_uint_t offset; |
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21 ngx_http_set_header_pt handler; |
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22 } ngx_http_set_header_t; |
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23 |
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24 |
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25 struct ngx_http_header_val_s { |
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26 ngx_http_complex_value_t value; |
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27 ngx_uint_t hash; |
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28 ngx_str_t key; |
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29 ngx_http_set_header_pt handler; |
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30 ngx_uint_t offset; |
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31 }; |
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32 |
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33 |
2013 | 34 #define NGX_HTTP_EXPIRES_OFF 0 |
35 #define NGX_HTTP_EXPIRES_EPOCH 1 | |
36 #define NGX_HTTP_EXPIRES_MAX 2 | |
37 #define NGX_HTTP_EXPIRES_ACCESS 3 | |
38 #define NGX_HTTP_EXPIRES_MODIFIED 4 | |
2163 | 39 #define NGX_HTTP_EXPIRES_DAILY 5 |
2013 | 40 |
41 | |
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42 typedef struct { |
2013 | 43 ngx_uint_t expires; |
44 time_t expires_time; | |
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45 ngx_array_t *headers; |
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46 } ngx_http_headers_conf_t; |
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47 |
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48 |
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49 static ngx_int_t ngx_http_set_expires(ngx_http_request_t *r, |
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50 ngx_http_headers_conf_t *conf); |
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51 static ngx_int_t ngx_http_add_cache_control(ngx_http_request_t *r, |
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52 ngx_http_header_val_t *hv, ngx_str_t *value); |
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53 static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r, |
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54 ngx_http_header_val_t *hv, ngx_str_t *value); |
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55 |
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56 static void *ngx_http_headers_create_conf(ngx_conf_t *cf); |
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57 static char *ngx_http_headers_merge_conf(ngx_conf_t *cf, |
573 | 58 void *parent, void *child); |
681 | 59 static ngx_int_t ngx_http_headers_filter_init(ngx_conf_t *cf); |
501 | 60 static char *ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, |
61 void *conf); | |
573 | 62 static char *ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, |
63 void *conf); | |
326
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64 |
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65 |
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66 static ngx_http_set_header_t ngx_http_set_headers[] = { |
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67 |
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68 { ngx_string("Cache-Control"), 0, ngx_http_add_cache_control }, |
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69 |
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70 { ngx_string("Last-Modified"), |
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71 offsetof(ngx_http_headers_out_t, last_modified), |
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72 ngx_http_set_last_modified }, |
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73 |
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74 { ngx_null_string, 0, NULL } |
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75 }; |
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76 |
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77 |
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78 static ngx_command_t ngx_http_headers_filter_commands[] = { |
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79 |
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80 { ngx_string("expires"), |
573 | 81 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF |
2013 | 82 |NGX_CONF_TAKE12, |
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83 ngx_http_headers_expires, |
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84 NGX_HTTP_LOC_CONF_OFFSET, |
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85 0, |
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86 NULL}, |
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87 |
573 | 88 { ngx_string("add_header"), |
89 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF | |
90 |NGX_CONF_TAKE2, | |
91 ngx_http_headers_add, | |
92 NGX_HTTP_LOC_CONF_OFFSET, | |
93 0, | |
94 NULL}, | |
95 | |
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96 ngx_null_command |
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97 }; |
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98 |
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99 |
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100 static ngx_http_module_t ngx_http_headers_filter_module_ctx = { |
509 | 101 NULL, /* preconfiguration */ |
681 | 102 ngx_http_headers_filter_init, /* postconfiguration */ |
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103 |
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104 NULL, /* create main configuration */ |
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105 NULL, /* init main configuration */ |
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106 |
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107 NULL, /* create server configuration */ |
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108 NULL, /* merge server configuration */ |
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109 |
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110 ngx_http_headers_create_conf, /* create location configuration */ |
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111 ngx_http_headers_merge_conf /* merge location configuration */ |
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112 }; |
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113 |
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114 |
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115 ngx_module_t ngx_http_headers_filter_module = { |
509 | 116 NGX_MODULE_V1, |
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117 &ngx_http_headers_filter_module_ctx, /* module context */ |
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118 ngx_http_headers_filter_commands, /* module directives */ |
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119 NGX_HTTP_MODULE, /* module type */ |
541 | 120 NULL, /* init master */ |
681 | 121 NULL, /* init module */ |
541 | 122 NULL, /* init process */ |
123 NULL, /* init thread */ | |
124 NULL, /* exit thread */ | |
125 NULL, /* exit process */ | |
126 NULL, /* exit master */ | |
127 NGX_MODULE_V1_PADDING | |
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128 }; |
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129 |
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130 |
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131 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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132 |
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133 |
501 | 134 static ngx_int_t |
135 ngx_http_headers_filter(ngx_http_request_t *r) | |
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136 { |
1364 | 137 ngx_str_t value; |
509 | 138 ngx_uint_t i; |
625 | 139 ngx_http_header_val_t *h; |
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140 ngx_http_headers_conf_t *conf; |
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141 |
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142 conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module); |
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143 |
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144 if ((conf->expires == NGX_HTTP_EXPIRES_OFF && conf->headers == NULL) |
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145 || r != r->main |
663 | 146 || (r->headers_out.status != NGX_HTTP_OK |
147 && r->headers_out.status != NGX_HTTP_NO_CONTENT | |
148 && r->headers_out.status != NGX_HTTP_MOVED_PERMANENTLY | |
149 && r->headers_out.status != NGX_HTTP_MOVED_TEMPORARILY | |
150 && r->headers_out.status != NGX_HTTP_NOT_MODIFIED)) | |
543 | 151 { |
326
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152 return ngx_http_next_header_filter(r); |
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153 } |
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154 |
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155 if (conf->expires != NGX_HTTP_EXPIRES_OFF) { |
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156 if (ngx_http_set_expires(r, conf) != NGX_OK) { |
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157 return NGX_ERROR; |
326
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158 } |
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159 } |
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160 |
573 | 161 if (conf->headers) { |
162 h = conf->headers->elts; | |
163 for (i = 0; i < conf->headers->nelts; i++) { | |
625 | 164 |
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165 if (ngx_http_complex_value(r, &h[i].value, &value) != NGX_OK) { |
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166 return NGX_ERROR; |
625 | 167 } |
168 | |
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169 if (h[i].handler(r, &h[i], &value) != NGX_OK) { |
625 | 170 return NGX_ERROR; |
171 } | |
573 | 172 } |
173 } | |
174 | |
326
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175 return ngx_http_next_header_filter(r); |
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176 } |
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177 |
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178 |
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179 static ngx_int_t |
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180 ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf) |
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181 { |
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182 size_t len; |
2163 | 183 time_t now, expires_time, max_age; |
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184 ngx_uint_t i; |
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185 ngx_table_elt_t *expires, *cc, **ccp; |
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186 |
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187 expires = r->headers_out.expires; |
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188 |
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189 if (expires == NULL) { |
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190 |
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191 expires = ngx_list_push(&r->headers_out.headers); |
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192 if (expires == NULL) { |
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193 return NGX_ERROR; |
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194 } |
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195 |
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196 r->headers_out.expires = expires; |
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197 |
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198 expires->hash = 1; |
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199 ngx_str_set(&expires->key, "Expires"); |
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200 } |
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201 |
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202 len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT"); |
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203 expires->value.len = len - 1; |
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204 |
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205 ccp = r->headers_out.cache_control.elts; |
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206 |
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207 if (ccp == NULL) { |
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208 |
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209 if (ngx_array_init(&r->headers_out.cache_control, r->pool, |
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210 1, sizeof(ngx_table_elt_t *)) |
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211 != NGX_OK) |
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212 { |
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213 return NGX_ERROR; |
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214 } |
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215 |
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216 ccp = ngx_array_push(&r->headers_out.cache_control); |
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217 if (ccp == NULL) { |
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218 return NGX_ERROR; |
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219 } |
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220 |
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221 cc = ngx_list_push(&r->headers_out.headers); |
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222 if (cc == NULL) { |
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223 return NGX_ERROR; |
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224 } |
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225 |
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226 cc->hash = 1; |
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227 ngx_str_set(&cc->key, "Cache-Control"); |
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228 *ccp = cc; |
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229 |
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230 } else { |
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231 for (i = 1; i < r->headers_out.cache_control.nelts; i++) { |
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232 ccp[i]->hash = 0; |
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233 } |
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234 |
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235 cc = ccp[0]; |
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236 } |
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237 |
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238 if (conf->expires == NGX_HTTP_EXPIRES_EPOCH) { |
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239 expires->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT"; |
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240 ngx_str_set(&cc->value, "no-cache"); |
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241 return NGX_OK; |
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242 } |
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243 |
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244 if (conf->expires == NGX_HTTP_EXPIRES_MAX) { |
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245 expires->value.data = (u_char *) "Thu, 31 Dec 2037 23:55:55 GMT"; |
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246 /* 10 years */ |
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247 ngx_str_set(&cc->value, "max-age=315360000"); |
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248 return NGX_OK; |
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249 } |
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250 |
2049 | 251 expires->value.data = ngx_pnalloc(r->pool, len); |
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252 if (expires->value.data == NULL) { |
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253 return NGX_ERROR; |
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254 } |
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255 |
2013 | 256 if (conf->expires_time == 0) { |
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257 ngx_memcpy(expires->value.data, ngx_cached_http_time.data, |
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258 ngx_cached_http_time.len + 1); |
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259 ngx_str_set(&cc->value, "max-age=0"); |
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260 return NGX_OK; |
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261 } |
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262 |
2163 | 263 now = ngx_time(); |
264 | |
2013 | 265 if (conf->expires == NGX_HTTP_EXPIRES_ACCESS |
266 || r->headers_out.last_modified_time == -1) | |
267 { | |
2163 | 268 expires_time = now + conf->expires_time; |
269 max_age = conf->expires_time; | |
270 | |
271 } else if (conf->expires == NGX_HTTP_EXPIRES_DAILY) { | |
272 expires_time = ngx_next_time(conf->expires_time); | |
273 max_age = expires_time - now; | |
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274 |
2013 | 275 } else { |
2163 | 276 expires_time = r->headers_out.last_modified_time + conf->expires_time; |
277 max_age = expires_time - now; | |
2013 | 278 } |
279 | |
2163 | 280 ngx_http_time(expires->value.data, expires_time); |
2013 | 281 |
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282 if (conf->expires_time < 0 || max_age < 0) { |
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283 ngx_str_set(&cc->value, "no-cache"); |
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284 return NGX_OK; |
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285 } |
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286 |
2049 | 287 cc->value.data = ngx_pnalloc(r->pool, |
288 sizeof("max-age=") + NGX_TIME_T_LEN + 1); | |
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289 if (cc->value.data == NULL) { |
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290 return NGX_ERROR; |
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291 } |
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292 |
2163 | 293 cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T", max_age) |
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294 - cc->value.data; |
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295 |
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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 ngx_int_t |
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301 ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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302 ngx_str_t *value) |
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303 { |
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304 ngx_table_elt_t *h; |
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305 |
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306 if (value->len) { |
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307 h = ngx_list_push(&r->headers_out.headers); |
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308 if (h == NULL) { |
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309 return NGX_ERROR; |
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310 } |
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311 |
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312 h->hash = hv->hash; |
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313 h->key = hv->key; |
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314 h->value = *value; |
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315 } |
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316 |
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317 return NGX_OK; |
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318 } |
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319 |
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320 |
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321 static ngx_int_t |
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322 ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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323 ngx_str_t *value) |
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324 { |
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325 ngx_table_elt_t *cc, **ccp; |
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326 |
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327 ccp = r->headers_out.cache_control.elts; |
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328 |
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329 if (ccp == NULL) { |
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330 |
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331 if (ngx_array_init(&r->headers_out.cache_control, r->pool, |
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332 1, sizeof(ngx_table_elt_t *)) |
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333 != NGX_OK) |
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334 { |
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335 return NGX_ERROR; |
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336 } |
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337 } |
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338 |
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339 ccp = ngx_array_push(&r->headers_out.cache_control); |
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340 if (ccp == NULL) { |
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341 return NGX_ERROR; |
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342 } |
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343 |
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344 cc = ngx_list_push(&r->headers_out.headers); |
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345 if (cc == NULL) { |
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346 return NGX_ERROR; |
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347 } |
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348 |
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349 cc->hash = 1; |
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350 ngx_str_set(&cc->key, "Cache-Control"); |
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351 cc->value = *value; |
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352 |
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353 *ccp = cc; |
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354 |
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355 return NGX_OK; |
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356 } |
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357 |
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358 |
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359 static ngx_int_t |
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360 ngx_http_set_last_modified(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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361 ngx_str_t *value) |
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362 { |
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363 ngx_table_elt_t *h, **old; |
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364 |
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365 if (hv->offset) { |
1364 | 366 old = (ngx_table_elt_t **) ((char *) &r->headers_out + hv->offset); |
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367 |
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368 } else { |
1364 | 369 old = NULL; |
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370 } |
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371 |
1655 | 372 r->headers_out.last_modified_time = -1; |
373 | |
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374 if (old == NULL || *old == NULL) { |
1655 | 375 |
376 if (value->len == 0) { | |
377 return NGX_OK; | |
378 } | |
379 | |
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380 h = ngx_list_push(&r->headers_out.headers); |
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381 if (h == NULL) { |
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382 return NGX_ERROR; |
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383 } |
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384 |
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385 } else { |
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386 h = *old; |
1655 | 387 |
388 if (value->len == 0) { | |
389 h->hash = 0; | |
390 return NGX_OK; | |
391 } | |
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392 } |
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393 |
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394 h->hash = hv->hash; |
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395 h->key = hv->key; |
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396 h->value = *value; |
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397 |
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398 return NGX_OK; |
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399 } |
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400 |
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401 |
501 | 402 static void * |
403 ngx_http_headers_create_conf(ngx_conf_t *cf) | |
577 | 404 { |
326
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405 ngx_http_headers_conf_t *conf; |
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406 |
573 | 407 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_headers_conf_t)); |
501 | 408 if (conf == NULL) { |
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409 return NULL; |
326
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410 } |
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411 |
573 | 412 /* |
413 * set by ngx_pcalloc(): | |
414 * | |
415 * conf->headers = NULL; | |
2013 | 416 * conf->expires_time = 0; |
573 | 417 */ |
418 | |
2013 | 419 conf->expires = NGX_CONF_UNSET_UINT; |
326
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420 |
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421 return conf; |
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422 } |
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423 |
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424 |
501 | 425 static char * |
426 ngx_http_headers_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
326
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427 { |
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428 ngx_http_headers_conf_t *prev = parent; |
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429 ngx_http_headers_conf_t *conf = child; |
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430 |
2013 | 431 if (conf->expires == NGX_CONF_UNSET_UINT) { |
432 conf->expires = prev->expires; | |
433 conf->expires_time = prev->expires_time; | |
434 | |
435 if (conf->expires == NGX_CONF_UNSET_UINT) { | |
436 conf->expires = NGX_HTTP_EXPIRES_OFF; | |
437 } | |
326
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438 } |
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439 |
573 | 440 if (conf->headers == NULL) { |
441 conf->headers = prev->headers; | |
442 } | |
443 | |
326
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444 return NGX_CONF_OK; |
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445 } |
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446 |
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447 |
681 | 448 static ngx_int_t |
449 ngx_http_headers_filter_init(ngx_conf_t *cf) | |
450 { | |
451 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
452 ngx_http_top_header_filter = ngx_http_headers_filter; | |
453 | |
454 return NGX_OK; | |
455 } | |
456 | |
457 | |
501 | 458 static char * |
459 ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
326
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460 { |
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461 ngx_http_headers_conf_t *hcf = conf; |
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462 |
2013 | 463 ngx_uint_t minus, n; |
326
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464 ngx_str_t *value; |
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465 |
2013 | 466 if (hcf->expires != NGX_CONF_UNSET_UINT) { |
326
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467 return "is duplicate"; |
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468 } |
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469 |
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470 value = cf->args->elts; |
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471 |
2013 | 472 if (cf->args->nelts == 2) { |
473 | |
474 if (ngx_strcmp(value[1].data, "epoch") == 0) { | |
475 hcf->expires = NGX_HTTP_EXPIRES_EPOCH; | |
476 return NGX_CONF_OK; | |
477 } | |
478 | |
479 if (ngx_strcmp(value[1].data, "max") == 0) { | |
480 hcf->expires = NGX_HTTP_EXPIRES_MAX; | |
481 return NGX_CONF_OK; | |
482 } | |
326
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483 |
2013 | 484 if (ngx_strcmp(value[1].data, "off") == 0) { |
485 hcf->expires = NGX_HTTP_EXPIRES_OFF; | |
486 return NGX_CONF_OK; | |
487 } | |
488 | |
489 hcf->expires = NGX_HTTP_EXPIRES_ACCESS; | |
490 | |
491 n = 1; | |
492 | |
493 } else { /* cf->args->nelts == 3 */ | |
494 | |
495 if (ngx_strcmp(value[1].data, "modified") != 0) { | |
496 return "invalid value"; | |
497 } | |
498 | |
499 hcf->expires = NGX_HTTP_EXPIRES_MODIFIED; | |
500 | |
501 n = 2; | |
729 | 502 } |
503 | |
2163 | 504 if (value[n].data[0] == '@') { |
505 value[n].data++; | |
506 value[n].len--; | |
507 minus = 0; | |
508 | |
509 if (hcf->expires == NGX_HTTP_EXPIRES_MODIFIED) { | |
510 return "daily time can not be used with \"modified\" parameter"; | |
511 } | |
512 | |
513 hcf->expires = NGX_HTTP_EXPIRES_DAILY; | |
514 | |
515 } else if (value[n].data[0] == '+') { | |
2013 | 516 value[n].data++; |
517 value[n].len--; | |
326
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518 minus = 0; |
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519 |
2013 | 520 } else if (value[n].data[0] == '-') { |
521 value[n].data++; | |
522 value[n].len--; | |
326
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523 minus = 1; |
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524 |
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525 } else { |
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526 minus = 0; |
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527 } |
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528 |
2013 | 529 hcf->expires_time = ngx_parse_time(&value[n], 1); |
501 | 530 |
2013 | 531 if (hcf->expires_time == NGX_ERROR) { |
326
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532 return "invalid value"; |
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533 } |
577 | 534 |
2164 | 535 if (hcf->expires == NGX_HTTP_EXPIRES_DAILY |
536 && hcf->expires_time > 24 * 60 * 60) | |
537 { | |
538 return "daily time value must be less than 24 hours"; | |
539 } | |
540 | |
2013 | 541 if (hcf->expires_time == NGX_PARSE_LARGE_TIME) { |
326
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542 return "value must be less than 68 years"; |
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543 } |
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544 |
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545 if (minus) { |
2013 | 546 hcf->expires_time = - hcf->expires_time; |
326
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547 } |
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548 |
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549 return NGX_CONF_OK; |
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550 } |
573 | 551 |
552 | |
553 static char * | |
554 ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
555 { | |
556 ngx_http_headers_conf_t *hcf = conf; | |
557 | |
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558 ngx_str_t *value; |
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559 ngx_uint_t i; |
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560 ngx_http_header_val_t *hv; |
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561 ngx_http_set_header_t *set; |
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562 ngx_http_compile_complex_value_t ccv; |
573 | 563 |
564 value = cf->args->elts; | |
565 | |
566 if (hcf->headers == NULL) { | |
625 | 567 hcf->headers = ngx_array_create(cf->pool, 1, |
568 sizeof(ngx_http_header_val_t)); | |
573 | 569 if (hcf->headers == NULL) { |
570 return NGX_CONF_ERROR; | |
571 } | |
572 } | |
573 | |
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574 hv = ngx_array_push(hcf->headers); |
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575 if (hv == NULL) { |
573 | 576 return NGX_CONF_ERROR; |
577 } | |
578 | |
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579 hv->hash = 1; |
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580 hv->key = value[1]; |
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581 hv->handler = ngx_http_add_header; |
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582 hv->offset = 0; |
625 | 583 |
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584 set = ngx_http_set_headers; |
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585 for (i = 0; set[i].name.len; i++) { |
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586 if (ngx_strcasecmp(value[1].data, set[i].name.data) != 0) { |
1363
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587 continue; |
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588 } |
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589 |
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590 hv->offset = set[i].offset; |
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591 hv->handler = set[i].handler; |
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592 |
1363
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593 break; |
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594 } |
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595 |
2605
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596 if (value[2].len == 0) { |
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597 ngx_memzero(&hv->value, sizeof(ngx_http_complex_value_t)); |
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598 return NGX_CONF_OK; |
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599 } |
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600 |
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601 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
625 | 602 |
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603 ccv.cf = cf; |
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604 ccv.value = &value[2]; |
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605 ccv.complex_value = &hv->value; |
625 | 606 |
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607 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
625 | 608 return NGX_CONF_ERROR; |
609 } | |
573 | 610 |
611 return NGX_CONF_OK; | |
612 } |