Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_headers_filter_module.c @ 5587:ceecde39853f
Gzip static: fixed NGX_CONF_FLAG misuse.
author | Valentin Bartenev <vbart@nginx.com> |
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date | Mon, 03 Mar 2014 17:17:25 +0400 |
parents | 7ed23dcfea3d |
children | 74ffe03555d0 |
rev | line source |
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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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11 |
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12 |
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13 typedef struct ngx_http_header_val_s ngx_http_header_val_t; |
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14 |
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15 typedef ngx_int_t (*ngx_http_set_header_pt)(ngx_http_request_t *r, |
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16 ngx_http_header_val_t *hv, ngx_str_t *value); |
625 | 17 |
18 | |
19 typedef struct { | |
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20 ngx_str_t name; |
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21 ngx_uint_t offset; |
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22 ngx_http_set_header_pt handler; |
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23 } ngx_http_set_header_t; |
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24 |
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25 |
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26 struct ngx_http_header_val_s { |
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27 ngx_http_complex_value_t value; |
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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 |
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34 typedef enum { |
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35 NGX_HTTP_EXPIRES_OFF, |
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36 NGX_HTTP_EXPIRES_EPOCH, |
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37 NGX_HTTP_EXPIRES_MAX, |
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38 NGX_HTTP_EXPIRES_ACCESS, |
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39 NGX_HTTP_EXPIRES_MODIFIED, |
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40 NGX_HTTP_EXPIRES_DAILY, |
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41 NGX_HTTP_EXPIRES_UNSET |
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42 } ngx_http_expires_t; |
2013 | 43 |
44 | |
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45 typedef struct { |
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46 ngx_http_expires_t expires; |
2013 | 47 time_t expires_time; |
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48 ngx_array_t *headers; |
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49 } ngx_http_headers_conf_t; |
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50 |
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51 |
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52 static ngx_int_t ngx_http_set_expires(ngx_http_request_t *r, |
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53 ngx_http_headers_conf_t *conf); |
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54 static ngx_int_t ngx_http_add_cache_control(ngx_http_request_t *r, |
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55 ngx_http_header_val_t *hv, ngx_str_t *value); |
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56 static ngx_int_t ngx_http_add_header(ngx_http_request_t *r, |
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57 ngx_http_header_val_t *hv, ngx_str_t *value); |
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58 static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r, |
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59 ngx_http_header_val_t *hv, ngx_str_t *value); |
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60 static ngx_int_t ngx_http_set_response_header(ngx_http_request_t *r, |
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61 ngx_http_header_val_t *hv, ngx_str_t *value); |
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62 |
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63 static void *ngx_http_headers_create_conf(ngx_conf_t *cf); |
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64 static char *ngx_http_headers_merge_conf(ngx_conf_t *cf, |
573 | 65 void *parent, void *child); |
681 | 66 static ngx_int_t ngx_http_headers_filter_init(ngx_conf_t *cf); |
501 | 67 static char *ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, |
68 void *conf); | |
573 | 69 static char *ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, |
70 void *conf); | |
326
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71 |
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72 |
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73 static ngx_http_set_header_t ngx_http_set_headers[] = { |
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74 |
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75 { ngx_string("Cache-Control"), 0, ngx_http_add_cache_control }, |
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76 |
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77 { ngx_string("Last-Modified"), |
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78 offsetof(ngx_http_headers_out_t, last_modified), |
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79 ngx_http_set_last_modified }, |
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80 |
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81 { ngx_string("ETag"), |
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82 offsetof(ngx_http_headers_out_t, etag), |
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83 ngx_http_set_response_header }, |
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84 |
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85 { ngx_null_string, 0, NULL } |
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86 }; |
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87 |
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88 |
326
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89 static ngx_command_t ngx_http_headers_filter_commands[] = { |
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90 |
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91 { ngx_string("expires"), |
573 | 92 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF |
2013 | 93 |NGX_CONF_TAKE12, |
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94 ngx_http_headers_expires, |
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95 NGX_HTTP_LOC_CONF_OFFSET, |
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96 0, |
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97 NULL}, |
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98 |
573 | 99 { ngx_string("add_header"), |
100 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF | |
101 |NGX_CONF_TAKE2, | |
102 ngx_http_headers_add, | |
103 NGX_HTTP_LOC_CONF_OFFSET, | |
104 0, | |
105 NULL}, | |
106 | |
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107 ngx_null_command |
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108 }; |
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109 |
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110 |
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111 static ngx_http_module_t ngx_http_headers_filter_module_ctx = { |
509 | 112 NULL, /* preconfiguration */ |
681 | 113 ngx_http_headers_filter_init, /* postconfiguration */ |
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114 |
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115 NULL, /* create main configuration */ |
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116 NULL, /* init main configuration */ |
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117 |
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118 NULL, /* create server configuration */ |
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119 NULL, /* merge server configuration */ |
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120 |
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121 ngx_http_headers_create_conf, /* create location configuration */ |
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122 ngx_http_headers_merge_conf /* merge location configuration */ |
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123 }; |
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124 |
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125 |
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126 ngx_module_t ngx_http_headers_filter_module = { |
509 | 127 NGX_MODULE_V1, |
326
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128 &ngx_http_headers_filter_module_ctx, /* module context */ |
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129 ngx_http_headers_filter_commands, /* module directives */ |
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130 NGX_HTTP_MODULE, /* module type */ |
541 | 131 NULL, /* init master */ |
681 | 132 NULL, /* init module */ |
541 | 133 NULL, /* init process */ |
134 NULL, /* init thread */ | |
135 NULL, /* exit thread */ | |
136 NULL, /* exit process */ | |
137 NULL, /* exit master */ | |
138 NGX_MODULE_V1_PADDING | |
326
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139 }; |
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140 |
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141 |
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142 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; |
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143 |
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144 |
501 | 145 static ngx_int_t |
146 ngx_http_headers_filter(ngx_http_request_t *r) | |
326
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147 { |
1364 | 148 ngx_str_t value; |
509 | 149 ngx_uint_t i; |
625 | 150 ngx_http_header_val_t *h; |
326
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151 ngx_http_headers_conf_t *conf; |
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152 |
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153 conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module); |
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154 |
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155 if ((conf->expires == NGX_HTTP_EXPIRES_OFF && conf->headers == NULL) |
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156 || r != r->main |
663 | 157 || (r->headers_out.status != NGX_HTTP_OK |
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158 && r->headers_out.status != NGX_HTTP_CREATED |
663 | 159 && r->headers_out.status != NGX_HTTP_NO_CONTENT |
4314
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Allowed add_header for proxied 206 replies.
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160 && r->headers_out.status != NGX_HTTP_PARTIAL_CONTENT |
663 | 161 && r->headers_out.status != NGX_HTTP_MOVED_PERMANENTLY |
162 && r->headers_out.status != NGX_HTTP_MOVED_TEMPORARILY | |
4491
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163 && r->headers_out.status != NGX_HTTP_SEE_OTHER |
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164 && r->headers_out.status != NGX_HTTP_NOT_MODIFIED |
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165 && r->headers_out.status != NGX_HTTP_TEMPORARY_REDIRECT)) |
543 | 166 { |
326
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167 return ngx_http_next_header_filter(r); |
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168 } |
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169 |
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170 if (conf->expires != NGX_HTTP_EXPIRES_OFF) { |
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171 if (ngx_http_set_expires(r, conf) != NGX_OK) { |
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172 return NGX_ERROR; |
326
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173 } |
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174 } |
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175 |
573 | 176 if (conf->headers) { |
177 h = conf->headers->elts; | |
178 for (i = 0; i < conf->headers->nelts; i++) { | |
625 | 179 |
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180 if (ngx_http_complex_value(r, &h[i].value, &value) != NGX_OK) { |
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181 return NGX_ERROR; |
625 | 182 } |
183 | |
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184 if (h[i].handler(r, &h[i], &value) != NGX_OK) { |
625 | 185 return NGX_ERROR; |
186 } | |
573 | 187 } |
188 } | |
189 | |
326
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190 return ngx_http_next_header_filter(r); |
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191 } |
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192 |
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193 |
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194 static ngx_int_t |
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195 ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf) |
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196 { |
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197 size_t len; |
2163 | 198 time_t now, expires_time, max_age; |
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199 ngx_uint_t i; |
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200 ngx_table_elt_t *expires, *cc, **ccp; |
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201 |
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202 expires = r->headers_out.expires; |
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203 |
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204 if (expires == NULL) { |
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205 |
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206 expires = ngx_list_push(&r->headers_out.headers); |
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207 if (expires == NULL) { |
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208 return NGX_ERROR; |
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209 } |
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210 |
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211 r->headers_out.expires = expires; |
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212 |
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213 expires->hash = 1; |
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214 ngx_str_set(&expires->key, "Expires"); |
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215 } |
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216 |
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217 len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT"); |
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218 expires->value.len = len - 1; |
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219 |
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220 ccp = r->headers_out.cache_control.elts; |
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221 |
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222 if (ccp == NULL) { |
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223 |
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224 if (ngx_array_init(&r->headers_out.cache_control, r->pool, |
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225 1, sizeof(ngx_table_elt_t *)) |
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226 != NGX_OK) |
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227 { |
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228 return NGX_ERROR; |
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229 } |
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230 |
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231 ccp = ngx_array_push(&r->headers_out.cache_control); |
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232 if (ccp == NULL) { |
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233 return NGX_ERROR; |
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234 } |
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235 |
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236 cc = ngx_list_push(&r->headers_out.headers); |
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237 if (cc == NULL) { |
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238 return NGX_ERROR; |
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239 } |
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240 |
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241 cc->hash = 1; |
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242 ngx_str_set(&cc->key, "Cache-Control"); |
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243 *ccp = cc; |
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244 |
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245 } else { |
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246 for (i = 1; i < r->headers_out.cache_control.nelts; i++) { |
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247 ccp[i]->hash = 0; |
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248 } |
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249 |
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250 cc = ccp[0]; |
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251 } |
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252 |
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253 if (conf->expires == NGX_HTTP_EXPIRES_EPOCH) { |
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254 expires->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT"; |
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255 ngx_str_set(&cc->value, "no-cache"); |
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256 return NGX_OK; |
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257 } |
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258 |
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259 if (conf->expires == NGX_HTTP_EXPIRES_MAX) { |
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260 expires->value.data = (u_char *) "Thu, 31 Dec 2037 23:55:55 GMT"; |
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261 /* 10 years */ |
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262 ngx_str_set(&cc->value, "max-age=315360000"); |
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263 return NGX_OK; |
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264 } |
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265 |
2049 | 266 expires->value.data = ngx_pnalloc(r->pool, len); |
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267 if (expires->value.data == NULL) { |
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268 return NGX_ERROR; |
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269 } |
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270 |
4216 | 271 if (conf->expires_time == 0 && conf->expires != NGX_HTTP_EXPIRES_DAILY) { |
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272 ngx_memcpy(expires->value.data, ngx_cached_http_time.data, |
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273 ngx_cached_http_time.len + 1); |
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274 ngx_str_set(&cc->value, "max-age=0"); |
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275 return NGX_OK; |
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276 } |
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277 |
2163 | 278 now = ngx_time(); |
279 | |
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280 if (conf->expires == NGX_HTTP_EXPIRES_DAILY) { |
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281 expires_time = ngx_next_time(conf->expires_time); |
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282 max_age = expires_time - now; |
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283 |
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284 } else if (conf->expires == NGX_HTTP_EXPIRES_ACCESS |
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285 || r->headers_out.last_modified_time == -1) |
2013 | 286 { |
2163 | 287 expires_time = now + conf->expires_time; |
288 max_age = conf->expires_time; | |
289 | |
2013 | 290 } else { |
2163 | 291 expires_time = r->headers_out.last_modified_time + conf->expires_time; |
292 max_age = expires_time - now; | |
2013 | 293 } |
294 | |
2163 | 295 ngx_http_time(expires->value.data, expires_time); |
2013 | 296 |
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297 if (conf->expires_time < 0 || max_age < 0) { |
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298 ngx_str_set(&cc->value, "no-cache"); |
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299 return NGX_OK; |
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300 } |
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301 |
2049 | 302 cc->value.data = ngx_pnalloc(r->pool, |
303 sizeof("max-age=") + NGX_TIME_T_LEN + 1); | |
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304 if (cc->value.data == NULL) { |
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305 return NGX_ERROR; |
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306 } |
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307 |
2163 | 308 cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T", max_age) |
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309 - cc->value.data; |
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310 |
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311 return NGX_OK; |
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312 } |
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313 |
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314 |
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315 static ngx_int_t |
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316 ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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317 ngx_str_t *value) |
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318 { |
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319 ngx_table_elt_t *h; |
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320 |
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321 if (value->len) { |
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322 h = ngx_list_push(&r->headers_out.headers); |
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323 if (h == NULL) { |
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324 return NGX_ERROR; |
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325 } |
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326 |
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327 h->hash = 1; |
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328 h->key = hv->key; |
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329 h->value = *value; |
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330 } |
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331 |
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332 return NGX_OK; |
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333 } |
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334 |
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335 |
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336 static ngx_int_t |
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337 ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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338 ngx_str_t *value) |
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339 { |
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340 ngx_table_elt_t *cc, **ccp; |
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341 |
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342 if (value->len == 0) { |
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343 return NGX_OK; |
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344 } |
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345 |
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346 ccp = r->headers_out.cache_control.elts; |
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347 |
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348 if (ccp == NULL) { |
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349 |
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350 if (ngx_array_init(&r->headers_out.cache_control, r->pool, |
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351 1, sizeof(ngx_table_elt_t *)) |
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352 != NGX_OK) |
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353 { |
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354 return NGX_ERROR; |
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355 } |
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356 } |
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357 |
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358 ccp = ngx_array_push(&r->headers_out.cache_control); |
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359 if (ccp == NULL) { |
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360 return NGX_ERROR; |
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361 } |
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362 |
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363 cc = ngx_list_push(&r->headers_out.headers); |
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364 if (cc == NULL) { |
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365 return NGX_ERROR; |
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366 } |
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367 |
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368 cc->hash = 1; |
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369 ngx_str_set(&cc->key, "Cache-Control"); |
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370 cc->value = *value; |
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371 |
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372 *ccp = cc; |
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373 |
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374 return NGX_OK; |
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375 } |
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376 |
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377 |
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378 static ngx_int_t |
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379 ngx_http_set_last_modified(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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380 ngx_str_t *value) |
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381 { |
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382 if (ngx_http_set_response_header(r, hv, value) != NGX_OK) { |
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383 return NGX_ERROR; |
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384 } |
1655 | 385 |
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386 r->headers_out.last_modified_time = |
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387 (value->len) ? ngx_http_parse_time(value->data, value->len) : -1; |
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388 |
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389 return NGX_OK; |
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390 } |
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391 |
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392 |
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393 static ngx_int_t |
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394 ngx_http_set_response_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, |
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395 ngx_str_t *value) |
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396 { |
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397 ngx_table_elt_t *h, **old; |
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398 |
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399 old = (ngx_table_elt_t **) ((char *) &r->headers_out + hv->offset); |
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400 |
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401 if (value->len == 0) { |
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402 if (*old) { |
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403 (*old)->hash = 0; |
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404 *old = NULL; |
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405 } |
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406 |
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407 return NGX_OK; |
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408 } |
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409 |
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410 if (*old) { |
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411 h = *old; |
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412 |
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413 } else { |
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414 h = ngx_list_push(&r->headers_out.headers); |
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415 if (h == NULL) { |
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416 return NGX_ERROR; |
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417 } |
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418 |
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419 *old = h; |
4747
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420 } |
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421 |
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422 h->hash = 1; |
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423 h->key = hv->key; |
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424 h->value = *value; |
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425 |
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426 return NGX_OK; |
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427 } |
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428 |
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429 |
501 | 430 static void * |
431 ngx_http_headers_create_conf(ngx_conf_t *cf) | |
577 | 432 { |
326
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433 ngx_http_headers_conf_t *conf; |
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434 |
573 | 435 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_headers_conf_t)); |
501 | 436 if (conf == NULL) { |
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437 return NULL; |
326
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438 } |
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439 |
573 | 440 /* |
441 * set by ngx_pcalloc(): | |
442 * | |
443 * conf->headers = NULL; | |
2013 | 444 * conf->expires_time = 0; |
573 | 445 */ |
446 | |
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447 conf->expires = NGX_HTTP_EXPIRES_UNSET; |
326
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448 |
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449 return conf; |
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450 } |
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451 |
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452 |
501 | 453 static char * |
454 ngx_http_headers_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
326
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455 { |
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456 ngx_http_headers_conf_t *prev = parent; |
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457 ngx_http_headers_conf_t *conf = child; |
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458 |
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Minor ngx_http_headers_filter_module.c code cleanup.
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459 if (conf->expires == NGX_HTTP_EXPIRES_UNSET) { |
2013 | 460 conf->expires = prev->expires; |
461 conf->expires_time = prev->expires_time; | |
462 | |
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463 if (conf->expires == NGX_HTTP_EXPIRES_UNSET) { |
2013 | 464 conf->expires = NGX_HTTP_EXPIRES_OFF; |
465 } | |
326
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466 } |
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467 |
573 | 468 if (conf->headers == NULL) { |
469 conf->headers = prev->headers; | |
470 } | |
471 | |
326
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472 return NGX_CONF_OK; |
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473 } |
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474 |
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475 |
681 | 476 static ngx_int_t |
477 ngx_http_headers_filter_init(ngx_conf_t *cf) | |
478 { | |
479 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
480 ngx_http_top_header_filter = ngx_http_headers_filter; | |
481 | |
482 return NGX_OK; | |
483 } | |
484 | |
485 | |
501 | 486 static char * |
487 ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
326
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488 { |
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489 ngx_http_headers_conf_t *hcf = conf; |
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490 |
2013 | 491 ngx_uint_t minus, n; |
326
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492 ngx_str_t *value; |
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|
493 |
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Minor ngx_http_headers_filter_module.c code cleanup.
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494 if (hcf->expires != NGX_HTTP_EXPIRES_UNSET) { |
326
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495 return "is duplicate"; |
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496 } |
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|
497 |
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498 value = cf->args->elts; |
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|
499 |
2013 | 500 if (cf->args->nelts == 2) { |
501 | |
502 if (ngx_strcmp(value[1].data, "epoch") == 0) { | |
503 hcf->expires = NGX_HTTP_EXPIRES_EPOCH; | |
504 return NGX_CONF_OK; | |
505 } | |
506 | |
507 if (ngx_strcmp(value[1].data, "max") == 0) { | |
508 hcf->expires = NGX_HTTP_EXPIRES_MAX; | |
509 return NGX_CONF_OK; | |
510 } | |
326
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511 |
2013 | 512 if (ngx_strcmp(value[1].data, "off") == 0) { |
513 hcf->expires = NGX_HTTP_EXPIRES_OFF; | |
514 return NGX_CONF_OK; | |
515 } | |
516 | |
517 hcf->expires = NGX_HTTP_EXPIRES_ACCESS; | |
518 | |
519 n = 1; | |
520 | |
521 } else { /* cf->args->nelts == 3 */ | |
522 | |
523 if (ngx_strcmp(value[1].data, "modified") != 0) { | |
524 return "invalid value"; | |
525 } | |
526 | |
527 hcf->expires = NGX_HTTP_EXPIRES_MODIFIED; | |
528 | |
529 n = 2; | |
729 | 530 } |
531 | |
2163 | 532 if (value[n].data[0] == '@') { |
533 value[n].data++; | |
534 value[n].len--; | |
535 minus = 0; | |
536 | |
537 if (hcf->expires == NGX_HTTP_EXPIRES_MODIFIED) { | |
4133
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Replaced "can not" with "cannot" and "could not" in a bunch of places.
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3516
diff
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|
538 return "daily time cannot be used with \"modified\" parameter"; |
2163 | 539 } |
540 | |
541 hcf->expires = NGX_HTTP_EXPIRES_DAILY; | |
542 | |
543 } else if (value[n].data[0] == '+') { | |
2013 | 544 value[n].data++; |
545 value[n].len--; | |
326
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546 minus = 0; |
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|
547 |
2013 | 548 } else if (value[n].data[0] == '-') { |
549 value[n].data++; | |
550 value[n].len--; | |
326
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551 minus = 1; |
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|
552 |
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|
553 } else { |
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|
554 minus = 0; |
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|
555 } |
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|
556 |
2013 | 557 hcf->expires_time = ngx_parse_time(&value[n], 1); |
501 | 558 |
4474 | 559 if (hcf->expires_time == (time_t) NGX_ERROR) { |
326
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|
560 return "invalid value"; |
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|
561 } |
577 | 562 |
2164 | 563 if (hcf->expires == NGX_HTTP_EXPIRES_DAILY |
564 && hcf->expires_time > 24 * 60 * 60) | |
565 { | |
566 return "daily time value must be less than 24 hours"; | |
567 } | |
568 | |
326
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|
569 if (minus) { |
2013 | 570 hcf->expires_time = - hcf->expires_time; |
326
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571 } |
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|
572 |
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|
573 return NGX_CONF_OK; |
8733703a37f3
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|
574 } |
573 | 575 |
576 | |
577 static char * | |
578 ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
579 { | |
580 ngx_http_headers_conf_t *hcf = conf; | |
581 | |
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|
582 ngx_str_t *value; |
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|
583 ngx_uint_t i; |
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|
584 ngx_http_header_val_t *hv; |
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|
585 ngx_http_set_header_t *set; |
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|
586 ngx_http_compile_complex_value_t ccv; |
573 | 587 |
588 value = cf->args->elts; | |
589 | |
590 if (hcf->headers == NULL) { | |
625 | 591 hcf->headers = ngx_array_create(cf->pool, 1, |
592 sizeof(ngx_http_header_val_t)); | |
573 | 593 if (hcf->headers == NULL) { |
594 return NGX_CONF_ERROR; | |
595 } | |
596 } | |
597 | |
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598 hv = ngx_array_push(hcf->headers); |
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|
599 if (hv == NULL) { |
573 | 600 return NGX_CONF_ERROR; |
601 } | |
602 | |
2588
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|
603 hv->key = value[1]; |
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604 hv->handler = ngx_http_add_header; |
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605 hv->offset = 0; |
625 | 606 |
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607 set = ngx_http_set_headers; |
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608 for (i = 0; set[i].name.len; i++) { |
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609 if (ngx_strcasecmp(value[1].data, set[i].name.data) != 0) { |
1363
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610 continue; |
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611 } |
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612 |
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613 hv->offset = set[i].offset; |
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614 hv->handler = set[i].handler; |
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615 |
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616 break; |
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617 } |
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618 |
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619 if (value[2].len == 0) { |
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620 ngx_memzero(&hv->value, sizeof(ngx_http_complex_value_t)); |
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621 return NGX_CONF_OK; |
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622 } |
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623 |
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624 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
625 | 625 |
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626 ccv.cf = cf; |
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627 ccv.value = &value[2]; |
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628 ccv.complex_value = &hv->value; |
625 | 629 |
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630 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
625 | 631 return NGX_CONF_ERROR; |
632 } | |
573 | 633 |
634 return NGX_CONF_OK; | |
635 } |