Mercurial > hg > nginx
annotate src/http/modules/ngx_http_headers_filter_module.c @ 4367:9c4acdf9b276 stable-1.0
Merge of r4315:
Allowed add_header for proxied 206 replies.
It was working for nginx's own 206 replies as they are seen as 200 in the
headers filter module (range filter goes later in the headers filter chain),
but not for proxied replies.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 14 Dec 2011 18:06:21 +0000 |
parents | ea0f2e1f84d4 |
children | 4919fb357a5d |
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 |
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, |
326
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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, |
326
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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 | |
4367 | 148 && r->headers_out.status != NGX_HTTP_PARTIAL_CONTENT |
663 | 149 && r->headers_out.status != NGX_HTTP_MOVED_PERMANENTLY |
150 && r->headers_out.status != NGX_HTTP_MOVED_TEMPORARILY | |
151 && r->headers_out.status != NGX_HTTP_NOT_MODIFIED)) | |
543 | 152 { |
326
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153 return ngx_http_next_header_filter(r); |
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154 } |
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155 |
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156 if (conf->expires != NGX_HTTP_EXPIRES_OFF) { |
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157 if (ngx_http_set_expires(r, conf) != NGX_OK) { |
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158 return NGX_ERROR; |
326
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159 } |
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160 } |
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161 |
573 | 162 if (conf->headers) { |
163 h = conf->headers->elts; | |
164 for (i = 0; i < conf->headers->nelts; i++) { | |
625 | 165 |
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166 if (ngx_http_complex_value(r, &h[i].value, &value) != NGX_OK) { |
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167 return NGX_ERROR; |
625 | 168 } |
169 | |
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170 if (h[i].handler(r, &h[i], &value) != NGX_OK) { |
625 | 171 return NGX_ERROR; |
172 } | |
573 | 173 } |
174 } | |
175 | |
326
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176 return ngx_http_next_header_filter(r); |
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177 } |
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178 |
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179 |
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180 static ngx_int_t |
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181 ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf) |
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182 { |
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183 size_t len; |
2163 | 184 time_t now, expires_time, max_age; |
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185 ngx_uint_t i; |
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186 ngx_table_elt_t *expires, *cc, **ccp; |
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187 |
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188 expires = r->headers_out.expires; |
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189 |
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190 if (expires == NULL) { |
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191 |
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192 expires = ngx_list_push(&r->headers_out.headers); |
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193 if (expires == NULL) { |
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194 return NGX_ERROR; |
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195 } |
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196 |
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197 r->headers_out.expires = expires; |
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198 |
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199 expires->hash = 1; |
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200 ngx_str_set(&expires->key, "Expires"); |
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201 } |
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202 |
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203 len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT"); |
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204 expires->value.len = len - 1; |
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205 |
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206 ccp = r->headers_out.cache_control.elts; |
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207 |
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208 if (ccp == NULL) { |
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209 |
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210 if (ngx_array_init(&r->headers_out.cache_control, r->pool, |
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211 1, sizeof(ngx_table_elt_t *)) |
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212 != NGX_OK) |
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213 { |
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214 return NGX_ERROR; |
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215 } |
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216 |
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217 ccp = ngx_array_push(&r->headers_out.cache_control); |
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218 if (ccp == NULL) { |
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219 return NGX_ERROR; |
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220 } |
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221 |
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222 cc = ngx_list_push(&r->headers_out.headers); |
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223 if (cc == NULL) { |
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224 return NGX_ERROR; |
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225 } |
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226 |
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227 cc->hash = 1; |
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228 ngx_str_set(&cc->key, "Cache-Control"); |
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229 *ccp = cc; |
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230 |
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231 } else { |
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232 for (i = 1; i < r->headers_out.cache_control.nelts; i++) { |
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233 ccp[i]->hash = 0; |
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234 } |
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235 |
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236 cc = ccp[0]; |
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237 } |
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238 |
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239 if (conf->expires == NGX_HTTP_EXPIRES_EPOCH) { |
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240 expires->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT"; |
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241 ngx_str_set(&cc->value, "no-cache"); |
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242 return NGX_OK; |
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243 } |
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244 |
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245 if (conf->expires == NGX_HTTP_EXPIRES_MAX) { |
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246 expires->value.data = (u_char *) "Thu, 31 Dec 2037 23:55:55 GMT"; |
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247 /* 10 years */ |
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248 ngx_str_set(&cc->value, "max-age=315360000"); |
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249 return NGX_OK; |
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250 } |
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251 |
2049 | 252 expires->value.data = ngx_pnalloc(r->pool, len); |
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253 if (expires->value.data == NULL) { |
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254 return NGX_ERROR; |
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255 } |
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256 |
4350 | 257 if (conf->expires_time == 0 && conf->expires != NGX_HTTP_EXPIRES_DAILY) { |
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258 ngx_memcpy(expires->value.data, ngx_cached_http_time.data, |
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259 ngx_cached_http_time.len + 1); |
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260 ngx_str_set(&cc->value, "max-age=0"); |
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261 return NGX_OK; |
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262 } |
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263 |
2163 | 264 now = ngx_time(); |
265 | |
4350 | 266 if (conf->expires == NGX_HTTP_EXPIRES_DAILY) { |
267 expires_time = ngx_next_time(conf->expires_time); | |
268 max_age = expires_time - now; | |
269 | |
270 } else if (conf->expires == NGX_HTTP_EXPIRES_ACCESS | |
271 || r->headers_out.last_modified_time == -1) | |
2013 | 272 { |
2163 | 273 expires_time = now + conf->expires_time; |
274 max_age = conf->expires_time; | |
275 | |
2013 | 276 } else { |
2163 | 277 expires_time = r->headers_out.last_modified_time + conf->expires_time; |
278 max_age = expires_time - now; | |
2013 | 279 } |
280 | |
2163 | 281 ngx_http_time(expires->value.data, expires_time); |
2013 | 282 |
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283 if (conf->expires_time < 0 || max_age < 0) { |
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284 ngx_str_set(&cc->value, "no-cache"); |
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285 return NGX_OK; |
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286 } |
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287 |
2049 | 288 cc->value.data = ngx_pnalloc(r->pool, |
289 sizeof("max-age=") + NGX_TIME_T_LEN + 1); | |
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290 if (cc->value.data == NULL) { |
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291 return NGX_ERROR; |
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292 } |
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293 |
2163 | 294 cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T", max_age) |
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295 - cc->value.data; |
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296 |
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297 return NGX_OK; |
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298 } |
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299 |
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300 |
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301 static ngx_int_t |
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302 ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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303 ngx_str_t *value) |
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304 { |
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305 ngx_table_elt_t *h; |
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306 |
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307 if (value->len) { |
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308 h = ngx_list_push(&r->headers_out.headers); |
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309 if (h == NULL) { |
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310 return NGX_ERROR; |
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311 } |
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312 |
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313 h->hash = hv->hash; |
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314 h->key = hv->key; |
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315 h->value = *value; |
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316 } |
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317 |
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318 return NGX_OK; |
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319 } |
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320 |
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321 |
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322 static ngx_int_t |
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323 ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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324 ngx_str_t *value) |
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325 { |
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326 ngx_table_elt_t *cc, **ccp; |
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327 |
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328 ccp = r->headers_out.cache_control.elts; |
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329 |
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330 if (ccp == NULL) { |
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331 |
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332 if (ngx_array_init(&r->headers_out.cache_control, r->pool, |
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333 1, sizeof(ngx_table_elt_t *)) |
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334 != NGX_OK) |
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335 { |
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336 return NGX_ERROR; |
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337 } |
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338 } |
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339 |
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340 ccp = ngx_array_push(&r->headers_out.cache_control); |
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341 if (ccp == NULL) { |
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342 return NGX_ERROR; |
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343 } |
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344 |
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345 cc = ngx_list_push(&r->headers_out.headers); |
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346 if (cc == NULL) { |
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347 return NGX_ERROR; |
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348 } |
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349 |
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350 cc->hash = 1; |
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351 ngx_str_set(&cc->key, "Cache-Control"); |
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352 cc->value = *value; |
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353 |
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354 *ccp = cc; |
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355 |
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356 return NGX_OK; |
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357 } |
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358 |
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359 |
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360 static ngx_int_t |
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361 ngx_http_set_last_modified(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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362 ngx_str_t *value) |
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363 { |
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364 ngx_table_elt_t *h, **old; |
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365 |
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366 if (hv->offset) { |
1364 | 367 old = (ngx_table_elt_t **) ((char *) &r->headers_out + hv->offset); |
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368 |
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369 } else { |
1364 | 370 old = NULL; |
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371 } |
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372 |
1655 | 373 r->headers_out.last_modified_time = -1; |
374 | |
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375 if (old == NULL || *old == NULL) { |
1655 | 376 |
377 if (value->len == 0) { | |
378 return NGX_OK; | |
379 } | |
380 | |
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381 h = ngx_list_push(&r->headers_out.headers); |
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382 if (h == NULL) { |
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383 return NGX_ERROR; |
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384 } |
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385 |
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386 } else { |
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387 h = *old; |
1655 | 388 |
389 if (value->len == 0) { | |
390 h->hash = 0; | |
391 return NGX_OK; | |
392 } | |
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393 } |
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394 |
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395 h->hash = hv->hash; |
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396 h->key = hv->key; |
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397 h->value = *value; |
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398 |
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399 return NGX_OK; |
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400 } |
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401 |
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402 |
501 | 403 static void * |
404 ngx_http_headers_create_conf(ngx_conf_t *cf) | |
577 | 405 { |
326
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406 ngx_http_headers_conf_t *conf; |
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407 |
573 | 408 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_headers_conf_t)); |
501 | 409 if (conf == NULL) { |
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410 return NULL; |
326
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411 } |
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412 |
573 | 413 /* |
414 * set by ngx_pcalloc(): | |
415 * | |
416 * conf->headers = NULL; | |
2013 | 417 * conf->expires_time = 0; |
573 | 418 */ |
419 | |
2013 | 420 conf->expires = NGX_CONF_UNSET_UINT; |
326
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421 |
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422 return conf; |
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423 } |
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424 |
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425 |
501 | 426 static char * |
427 ngx_http_headers_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
326
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428 { |
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429 ngx_http_headers_conf_t *prev = parent; |
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430 ngx_http_headers_conf_t *conf = child; |
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431 |
2013 | 432 if (conf->expires == NGX_CONF_UNSET_UINT) { |
433 conf->expires = prev->expires; | |
434 conf->expires_time = prev->expires_time; | |
435 | |
436 if (conf->expires == NGX_CONF_UNSET_UINT) { | |
437 conf->expires = NGX_HTTP_EXPIRES_OFF; | |
438 } | |
326
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439 } |
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440 |
573 | 441 if (conf->headers == NULL) { |
442 conf->headers = prev->headers; | |
443 } | |
444 | |
326
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445 return NGX_CONF_OK; |
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446 } |
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447 |
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448 |
681 | 449 static ngx_int_t |
450 ngx_http_headers_filter_init(ngx_conf_t *cf) | |
451 { | |
452 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
453 ngx_http_top_header_filter = ngx_http_headers_filter; | |
454 | |
455 return NGX_OK; | |
456 } | |
457 | |
458 | |
501 | 459 static char * |
460 ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
326
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461 { |
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462 ngx_http_headers_conf_t *hcf = conf; |
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463 |
2013 | 464 ngx_uint_t minus, n; |
326
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465 ngx_str_t *value; |
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466 |
2013 | 467 if (hcf->expires != NGX_CONF_UNSET_UINT) { |
326
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468 return "is duplicate"; |
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469 } |
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470 |
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471 value = cf->args->elts; |
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472 |
2013 | 473 if (cf->args->nelts == 2) { |
474 | |
475 if (ngx_strcmp(value[1].data, "epoch") == 0) { | |
476 hcf->expires = NGX_HTTP_EXPIRES_EPOCH; | |
477 return NGX_CONF_OK; | |
478 } | |
479 | |
480 if (ngx_strcmp(value[1].data, "max") == 0) { | |
481 hcf->expires = NGX_HTTP_EXPIRES_MAX; | |
482 return NGX_CONF_OK; | |
483 } | |
326
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484 |
2013 | 485 if (ngx_strcmp(value[1].data, "off") == 0) { |
486 hcf->expires = NGX_HTTP_EXPIRES_OFF; | |
487 return NGX_CONF_OK; | |
488 } | |
489 | |
490 hcf->expires = NGX_HTTP_EXPIRES_ACCESS; | |
491 | |
492 n = 1; | |
493 | |
494 } else { /* cf->args->nelts == 3 */ | |
495 | |
496 if (ngx_strcmp(value[1].data, "modified") != 0) { | |
497 return "invalid value"; | |
498 } | |
499 | |
500 hcf->expires = NGX_HTTP_EXPIRES_MODIFIED; | |
501 | |
502 n = 2; | |
729 | 503 } |
504 | |
2163 | 505 if (value[n].data[0] == '@') { |
506 value[n].data++; | |
507 value[n].len--; | |
508 minus = 0; | |
509 | |
510 if (hcf->expires == NGX_HTTP_EXPIRES_MODIFIED) { | |
4246
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Merging r4132, r4134, r4143, r4183, r4191, r4199:
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511 return "daily time cannot be used with \"modified\" parameter"; |
2163 | 512 } |
513 | |
514 hcf->expires = NGX_HTTP_EXPIRES_DAILY; | |
515 | |
516 } else if (value[n].data[0] == '+') { | |
2013 | 517 value[n].data++; |
518 value[n].len--; | |
326
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519 minus = 0; |
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520 |
2013 | 521 } else if (value[n].data[0] == '-') { |
522 value[n].data++; | |
523 value[n].len--; | |
326
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524 minus = 1; |
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525 |
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526 } else { |
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527 minus = 0; |
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528 } |
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529 |
2013 | 530 hcf->expires_time = ngx_parse_time(&value[n], 1); |
501 | 531 |
2013 | 532 if (hcf->expires_time == NGX_ERROR) { |
326
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533 return "invalid value"; |
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534 } |
577 | 535 |
2164 | 536 if (hcf->expires == NGX_HTTP_EXPIRES_DAILY |
537 && hcf->expires_time > 24 * 60 * 60) | |
538 { | |
539 return "daily time value must be less than 24 hours"; | |
540 } | |
541 | |
2013 | 542 if (hcf->expires_time == NGX_PARSE_LARGE_TIME) { |
326
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543 return "value must be less than 68 years"; |
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544 } |
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545 |
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546 if (minus) { |
2013 | 547 hcf->expires_time = - hcf->expires_time; |
326
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548 } |
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549 |
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550 return NGX_CONF_OK; |
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551 } |
573 | 552 |
553 | |
554 static char * | |
555 ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
556 { | |
557 ngx_http_headers_conf_t *hcf = conf; | |
558 | |
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559 ngx_str_t *value; |
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560 ngx_uint_t i; |
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561 ngx_http_header_val_t *hv; |
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562 ngx_http_set_header_t *set; |
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563 ngx_http_compile_complex_value_t ccv; |
573 | 564 |
565 value = cf->args->elts; | |
566 | |
567 if (hcf->headers == NULL) { | |
625 | 568 hcf->headers = ngx_array_create(cf->pool, 1, |
569 sizeof(ngx_http_header_val_t)); | |
573 | 570 if (hcf->headers == NULL) { |
571 return NGX_CONF_ERROR; | |
572 } | |
573 } | |
574 | |
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575 hv = ngx_array_push(hcf->headers); |
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576 if (hv == NULL) { |
573 | 577 return NGX_CONF_ERROR; |
578 } | |
579 | |
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580 hv->hash = 1; |
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581 hv->key = value[1]; |
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582 hv->handler = ngx_http_add_header; |
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583 hv->offset = 0; |
625 | 584 |
2588
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585 set = ngx_http_set_headers; |
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586 for (i = 0; set[i].name.len; i++) { |
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587 if (ngx_strcasecmp(value[1].data, set[i].name.data) != 0) { |
1363
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588 continue; |
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589 } |
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|
590 |
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591 hv->offset = set[i].offset; |
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592 hv->handler = set[i].handler; |
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593 |
1363
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594 break; |
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595 } |
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596 |
2605
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597 if (value[2].len == 0) { |
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598 ngx_memzero(&hv->value, sizeof(ngx_http_complex_value_t)); |
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599 return NGX_CONF_OK; |
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600 } |
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|
601 |
2588
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602 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
625 | 603 |
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604 ccv.cf = cf; |
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605 ccv.value = &value[2]; |
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606 ccv.complex_value = &hv->value; |
625 | 607 |
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608 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
625 | 609 return NGX_CONF_ERROR; |
610 } | |
573 | 611 |
612 return NGX_CONF_OK; | |
613 } |