Mercurial > hg > nginx-vendor-0-7
comparison src/http/modules/ngx_http_headers_filter_module.c @ 50:72eb30262aac NGINX_0_1_25
nginx 0.1.25
*) Bugfix: nginx did run on Linux parisc.
*) Feature: nginx now does not start under FreeBSD if the sysctl
kern.ipc.somaxconn value is too big.
*) Bugfix: if a request was internally redirected by the
ngx_http_index_module module to the ngx_http_proxy_module or
ngx_http_fastcgi_module modules, then the index file was not closed
after request completion.
*) Feature: the "proxy_pass" can be used in location with regular
expression.
*) Feature: the ngx_http_rewrite_filter_module module supports the
condition like "if ($HTTP_USER_AGENT ~ MSIE)".
*) Bugfix: nginx started too slow if the large number of addresses and
text values were used in the "geo" directive.
*) Change: a variable name must be declared as "$name" in the "geo"
directive. The previous variant without "$" is still supported, but
will be removed soon.
*) Feature: the "%{VARIABLE}v" logging parameter.
*) Feature: the "set $name value" directive.
*) Bugfix: gcc 4.0 compatibility.
*) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.
author | Igor Sysoev <http://sysoev.ru> |
---|---|
date | Sat, 19 Mar 2005 00:00:00 +0300 |
parents | |
children | b55cbf18157e |
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49:93dabbc9efb9 | 50:72eb30262aac |
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1 | |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #include <ngx_config.h> | |
8 #include <ngx_core.h> | |
9 #include <ngx_http.h> | |
10 | |
11 | |
12 typedef struct { | |
13 time_t expires; | |
14 } ngx_http_headers_conf_t; | |
15 | |
16 | |
17 #define NGX_HTTP_EXPIRES_UNSET -2147483647 | |
18 #define NGX_HTTP_EXPIRES_OFF -2147483646 | |
19 #define NGX_HTTP_EXPIRES_EPOCH -2147483645 | |
20 | |
21 | |
22 static ngx_int_t ngx_http_headers_filter_init(ngx_cycle_t *cycle); | |
23 static void *ngx_http_headers_create_conf(ngx_conf_t *cf); | |
24 static char *ngx_http_headers_merge_conf(ngx_conf_t *cf, | |
25 void *parent, void *child); | |
26 static char *ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, | |
27 void *conf); | |
28 | |
29 | |
30 static ngx_command_t ngx_http_headers_filter_commands[] = { | |
31 | |
32 { ngx_string("expires"), | |
33 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1, | |
34 ngx_http_headers_expires, | |
35 NGX_HTTP_LOC_CONF_OFFSET, | |
36 0, | |
37 NULL}, | |
38 | |
39 ngx_null_command | |
40 }; | |
41 | |
42 | |
43 static ngx_http_module_t ngx_http_headers_filter_module_ctx = { | |
44 NULL, /* pre conf */ | |
45 | |
46 NULL, /* create main configuration */ | |
47 NULL, /* init main configuration */ | |
48 | |
49 NULL, /* create server configuration */ | |
50 NULL, /* merge server configuration */ | |
51 | |
52 ngx_http_headers_create_conf, /* create location configuration */ | |
53 ngx_http_headers_merge_conf /* merge location configuration */ | |
54 }; | |
55 | |
56 | |
57 ngx_module_t ngx_http_headers_filter_module = { | |
58 NGX_MODULE, | |
59 &ngx_http_headers_filter_module_ctx, /* module context */ | |
60 ngx_http_headers_filter_commands, /* module directives */ | |
61 NGX_HTTP_MODULE, /* module type */ | |
62 ngx_http_headers_filter_init, /* init module */ | |
63 NULL /* init process */ | |
64 }; | |
65 | |
66 | |
67 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
68 | |
69 | |
70 static ngx_int_t | |
71 ngx_http_headers_filter(ngx_http_request_t *r) | |
72 { | |
73 size_t len; | |
74 ngx_table_elt_t *expires, *cc; | |
75 ngx_http_headers_conf_t *conf; | |
76 | |
77 if (r->headers_out.status != NGX_HTTP_OK) { | |
78 return ngx_http_next_header_filter(r); | |
79 } | |
80 | |
81 conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module); | |
82 | |
83 if (conf->expires != NGX_HTTP_EXPIRES_OFF) { | |
84 | |
85 expires = ngx_list_push(&r->headers_out.headers); | |
86 if (expires == NULL) { | |
87 return NGX_ERROR; | |
88 } | |
89 | |
90 r->headers_out.expires = expires; | |
91 | |
92 cc = ngx_list_push(&r->headers_out.headers); | |
93 if (cc == NULL) { | |
94 return NGX_ERROR; | |
95 } | |
96 | |
97 r->headers_out.cache_control = cc; | |
98 | |
99 len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT"); | |
100 | |
101 expires->key.len = sizeof("Expires") - 1; | |
102 expires->key.data = (u_char *) "Expires"; | |
103 expires->value.len = len - 1; | |
104 | |
105 cc->key.len = sizeof("Cache-Control") - 1; | |
106 cc->key.data = (u_char *) "Cache-Control"; | |
107 | |
108 if (conf->expires == NGX_HTTP_EXPIRES_EPOCH) { | |
109 expires->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT"; | |
110 | |
111 cc->value.len = sizeof("no-cache") - 1; | |
112 cc->value.data = (u_char *) "no-cache"; | |
113 | |
114 } else { | |
115 expires->value.data = ngx_palloc(r->pool, len); | |
116 if (expires->value.data == NULL) { | |
117 return NGX_ERROR; | |
118 } | |
119 | |
120 if (conf->expires == 0) { | |
121 ngx_memcpy(expires->value.data, ngx_cached_http_time.data, | |
122 ngx_cached_http_time.len + 1); | |
123 | |
124 cc->value.len = sizeof("max-age=0") - 1; | |
125 cc->value.data = (u_char *) "max-age=0"; | |
126 | |
127 } else { | |
128 ngx_http_time(expires->value.data, ngx_time() + conf->expires); | |
129 | |
130 if (conf->expires < 0) { | |
131 cc->value.len = sizeof("no-cache") - 1; | |
132 cc->value.data = (u_char *) "no-cache"; | |
133 | |
134 } else { | |
135 cc->value.data = ngx_palloc(r->pool, sizeof("max-age=") | |
136 + NGX_TIME_T_LEN + 1); | |
137 if (cc->value.data == NULL) { | |
138 return NGX_ERROR; | |
139 } | |
140 | |
141 cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T", | |
142 conf->expires) | |
143 - cc->value.data; | |
144 | |
145 } | |
146 } | |
147 } | |
148 } | |
149 | |
150 return ngx_http_next_header_filter(r); | |
151 } | |
152 | |
153 | |
154 static ngx_int_t | |
155 ngx_http_headers_filter_init(ngx_cycle_t *cycle) | |
156 { | |
157 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
158 ngx_http_top_header_filter = ngx_http_headers_filter; | |
159 | |
160 return NGX_OK; | |
161 } | |
162 | |
163 | |
164 static void * | |
165 ngx_http_headers_create_conf(ngx_conf_t *cf) | |
166 { | |
167 ngx_http_headers_conf_t *conf; | |
168 | |
169 conf = ngx_palloc(cf->pool, sizeof(ngx_http_headers_conf_t)); | |
170 if (conf == NULL) { | |
171 return NGX_CONF_ERROR; | |
172 } | |
173 | |
174 conf->expires = NGX_HTTP_EXPIRES_UNSET; | |
175 | |
176 return conf; | |
177 } | |
178 | |
179 | |
180 static char * | |
181 ngx_http_headers_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
182 { | |
183 ngx_http_headers_conf_t *prev = parent; | |
184 ngx_http_headers_conf_t *conf = child; | |
185 | |
186 if (conf->expires == NGX_HTTP_EXPIRES_UNSET) { | |
187 conf->expires = (prev->expires == NGX_HTTP_EXPIRES_UNSET) ? | |
188 NGX_HTTP_EXPIRES_OFF : prev->expires; | |
189 } | |
190 | |
191 return NGX_CONF_OK; | |
192 } | |
193 | |
194 | |
195 static char * | |
196 ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
197 { | |
198 ngx_http_headers_conf_t *hcf = conf; | |
199 | |
200 ngx_uint_t minus; | |
201 ngx_str_t *value; | |
202 | |
203 if (hcf->expires != NGX_HTTP_EXPIRES_UNSET) { | |
204 return "is duplicate"; | |
205 } | |
206 | |
207 value = cf->args->elts; | |
208 | |
209 if (ngx_strcmp(value[1].data, "epoch") == 0) { | |
210 hcf->expires = NGX_HTTP_EXPIRES_EPOCH; | |
211 return NGX_CONF_OK; | |
212 } | |
213 | |
214 if (ngx_strcmp(value[1].data, "off") == 0) { | |
215 hcf->expires = NGX_HTTP_EXPIRES_OFF; | |
216 return NGX_CONF_OK; | |
217 } | |
218 | |
219 if (value[1].data[0] == '+') { | |
220 value[1].data++; | |
221 value[1].len--; | |
222 minus = 0; | |
223 | |
224 } else if (value[1].data[0] == '-') { | |
225 value[1].data++; | |
226 value[1].len--; | |
227 minus = 1; | |
228 | |
229 } else { | |
230 minus = 0; | |
231 } | |
232 | |
233 hcf->expires = ngx_parse_time(&value[1], 1); | |
234 | |
235 if (hcf->expires == NGX_ERROR) { | |
236 return "invalid value"; | |
237 } | |
238 | |
239 if (hcf->expires == NGX_PARSE_LARGE_TIME) { | |
240 return "value must be less than 68 years"; | |
241 } | |
242 | |
243 if (minus) { | |
244 hcf->expires = - hcf->expires; | |
245 } | |
246 | |
247 return NGX_CONF_OK; | |
248 } |