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comparison src/http/modules/ngx_http_headers_filter_module.c @ 1366:279210f24408

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move "Expires" header code to a separate function
author Igor Sysoev <igor@sysoev.ru>
date Wed, 01 Aug 2007 19:32:58 +0000
parents d1dc7ef7c3ce
children b318cdca3aac
comparison
equal deleted inserted replaced
1365:d1dc7ef7c3ce 1366:279210f24408
41 #define NGX_HTTP_EXPIRES_OFF -2147483646 41 #define NGX_HTTP_EXPIRES_OFF -2147483646
42 #define NGX_HTTP_EXPIRES_EPOCH -2147483645 42 #define NGX_HTTP_EXPIRES_EPOCH -2147483645
43 #define NGX_HTTP_EXPIRES_MAX -2147483644 43 #define NGX_HTTP_EXPIRES_MAX -2147483644
44 44
45 45
46 static ngx_int_t ngx_http_set_expires(ngx_http_request_t *r,
47 ngx_http_headers_conf_t *conf);
46 static ngx_int_t ngx_http_add_cache_control(ngx_http_request_t *r, 48 static ngx_int_t ngx_http_add_cache_control(ngx_http_request_t *r,
47 ngx_http_header_val_t *hv, ngx_str_t *value); 49 ngx_http_header_val_t *hv, ngx_str_t *value);
48 static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r, 50 static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r,
49 ngx_http_header_val_t *hv, ngx_str_t *value); 51 ngx_http_header_val_t *hv, ngx_str_t *value);
50 52
127 129
128 130
129 static ngx_int_t 131 static ngx_int_t
130 ngx_http_headers_filter(ngx_http_request_t *r) 132 ngx_http_headers_filter(ngx_http_request_t *r)
131 { 133 {
132 size_t len;
133 ngx_str_t value; 134 ngx_str_t value;
134 ngx_uint_t i; 135 ngx_uint_t i;
135 ngx_table_elt_t *expires, *cc, **ccp;
136 ngx_http_header_val_t *h; 136 ngx_http_header_val_t *h;
137 ngx_http_headers_conf_t *conf; 137 ngx_http_headers_conf_t *conf;
138 138
139 if (r != r->main 139 conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module);
140
141 if ((conf->expires == NGX_HTTP_EXPIRES_OFF && conf->headers == NULL)
142 || r != r->main
140 || (r->headers_out.status != NGX_HTTP_OK 143 || (r->headers_out.status != NGX_HTTP_OK
141 && r->headers_out.status != NGX_HTTP_NO_CONTENT 144 && r->headers_out.status != NGX_HTTP_NO_CONTENT
142 && r->headers_out.status != NGX_HTTP_MOVED_PERMANENTLY 145 && r->headers_out.status != NGX_HTTP_MOVED_PERMANENTLY
143 && r->headers_out.status != NGX_HTTP_MOVED_TEMPORARILY 146 && r->headers_out.status != NGX_HTTP_MOVED_TEMPORARILY
144 && r->headers_out.status != NGX_HTTP_NOT_MODIFIED)) 147 && r->headers_out.status != NGX_HTTP_NOT_MODIFIED))
145 { 148 {
146 return ngx_http_next_header_filter(r); 149 return ngx_http_next_header_filter(r);
147 } 150 }
148 151
149 conf = ngx_http_get_module_loc_conf(r, ngx_http_headers_filter_module);
150
151 if (conf->expires != NGX_HTTP_EXPIRES_OFF) { 152 if (conf->expires != NGX_HTTP_EXPIRES_OFF) {
152 153 if (ngx_http_set_expires(r, conf) != NGX_OK) {
153 expires = r->headers_out.expires; 154 return NGX_ERROR;
154
155 if (expires == NULL) {
156
157 expires = ngx_list_push(&r->headers_out.headers);
158 if (expires == NULL) {
159 return NGX_ERROR;
160 }
161
162 r->headers_out.expires = expires;
163
164 expires->hash = 1;
165 expires->key.len = sizeof("Expires") - 1;
166 expires->key.data = (u_char *) "Expires";
167 }
168
169 len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT");
170 expires->value.len = len - 1;
171
172 ccp = r->headers_out.cache_control.elts;
173
174 if (ccp == NULL) {
175
176 if (ngx_array_init(&r->headers_out.cache_control, r->pool,
177 1, sizeof(ngx_table_elt_t *))
178 != NGX_OK)
179 {
180 return NGX_ERROR;
181 }
182
183 ccp = ngx_array_push(&r->headers_out.cache_control);
184 if (ccp == NULL) {
185 return NGX_ERROR;
186 }
187
188 cc = ngx_list_push(&r->headers_out.headers);
189 if (cc == NULL) {
190 return NGX_ERROR;
191 }
192
193 cc->hash = 1;
194 cc->key.len = sizeof("Cache-Control") - 1;
195 cc->key.data = (u_char *) "Cache-Control";
196
197 *ccp = cc;
198
199 } else {
200 for (i = 1; i < r->headers_out.cache_control.nelts; i++) {
201 ccp[i]->hash = 0;
202 }
203
204 cc = ccp[0];
205 }
206
207 if (conf->expires == NGX_HTTP_EXPIRES_EPOCH) {
208 expires->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT";
209
210 cc->value.len = sizeof("no-cache") - 1;
211 cc->value.data = (u_char *) "no-cache";
212
213 } else if (conf->expires == NGX_HTTP_EXPIRES_MAX) {
214 expires->value.data = (u_char *) "Thu, 31 Dec 2037 23:55:55 GMT";
215
216 /* 10 years */
217 cc->value.len = sizeof("max-age=315360000") - 1;
218 cc->value.data = (u_char *) "max-age=315360000";
219
220 } else {
221 expires->value.data = ngx_palloc(r->pool, len);
222 if (expires->value.data == NULL) {
223 return NGX_ERROR;
224 }
225
226 if (conf->expires == 0) {
227 ngx_memcpy(expires->value.data, ngx_cached_http_time.data,
228 ngx_cached_http_time.len + 1);
229
230 cc->value.len = sizeof("max-age=0") - 1;
231 cc->value.data = (u_char *) "max-age=0";
232
233 } else {
234 ngx_http_time(expires->value.data, ngx_time() + conf->expires);
235
236 if (conf->expires < 0) {
237 cc->value.len = sizeof("no-cache") - 1;
238 cc->value.data = (u_char *) "no-cache";
239
240 } else {
241 cc->value.data = ngx_palloc(r->pool, sizeof("max-age=")
242 + NGX_TIME_T_LEN + 1);
243 if (cc->value.data == NULL) {
244 return NGX_ERROR;
245 }
246
247 cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T",
248 conf->expires)
249 - cc->value.data;
250 }
251 }
252 } 155 }
253 } 156 }
254 157
255 if (conf->headers) { 158 if (conf->headers) {
256 h = conf->headers->elts; 159 h = conf->headers->elts;
277 return ngx_http_next_header_filter(r); 180 return ngx_http_next_header_filter(r);
278 } 181 }
279 182
280 183
281 static ngx_int_t 184 static ngx_int_t
282 ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, 185 ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf)
283 ngx_str_t *value) 186 {
284 { 187 size_t len;
285 ngx_table_elt_t *h; 188 ngx_uint_t i;
286 189 ngx_table_elt_t *expires, *cc, **ccp;
287 h = ngx_list_push(&r->headers_out.headers); 190
288 if (h == NULL) { 191 expires = r->headers_out.expires;
289 return NGX_ERROR; 192
290 } 193 if (expires == NULL) {
291 194
292 h->hash = hv->value.hash; 195 expires = ngx_list_push(&r->headers_out.headers);
293 h->key = hv->value.key; 196 if (expires == NULL) {
294 h->value = *value; 197 return NGX_ERROR;
295 198 }
296 return NGX_OK; 199
297 } 200 r->headers_out.expires = expires;
298 201
299 202 expires->hash = 1;
300 static ngx_int_t 203 expires->key.len = sizeof("Expires") - 1;
301 ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_header_val_t *hv, 204 expires->key.data = (u_char *) "Expires";
302 ngx_str_t *value) 205 }
303 { 206
304 ngx_table_elt_t *cc, **ccp; 207 len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT");
208 expires->value.len = len - 1;
305 209
306 ccp = r->headers_out.cache_control.elts; 210 ccp = r->headers_out.cache_control.elts;
307 211
308 if (ccp == NULL) { 212 if (ccp == NULL) {
309 213
311 1, sizeof(ngx_table_elt_t *)) 215 1, sizeof(ngx_table_elt_t *))
312 != NGX_OK) 216 != NGX_OK)
313 { 217 {
314 return NGX_ERROR; 218 return NGX_ERROR;
315 } 219 }
220
221 ccp = ngx_array_push(&r->headers_out.cache_control);
222 if (ccp == NULL) {
223 return NGX_ERROR;
224 }
225
226 cc = ngx_list_push(&r->headers_out.headers);
227 if (cc == NULL) {
228 return NGX_ERROR;
229 }
230
231 cc->hash = 1;
232 cc->key.len = sizeof("Cache-Control") - 1;
233 cc->key.data = (u_char *) "Cache-Control";
234
235 *ccp = cc;
236
237 } else {
238 for (i = 1; i < r->headers_out.cache_control.nelts; i++) {
239 ccp[i]->hash = 0;
240 }
241
242 cc = ccp[0];
243 }
244
245 if (conf->expires == NGX_HTTP_EXPIRES_EPOCH) {
246 expires->value.data = (u_char *) "Thu, 01 Jan 1970 00:00:01 GMT";
247
248 cc->value.len = sizeof("no-cache") - 1;
249 cc->value.data = (u_char *) "no-cache";
250
251 return NGX_OK;
252 }
253
254 if (conf->expires == NGX_HTTP_EXPIRES_MAX) {
255 expires->value.data = (u_char *) "Thu, 31 Dec 2037 23:55:55 GMT";
256
257 /* 10 years */
258 cc->value.len = sizeof("max-age=315360000") - 1;
259 cc->value.data = (u_char *) "max-age=315360000";
260
261 return NGX_OK;
262 }
263
264 expires->value.data = ngx_palloc(r->pool, len);
265 if (expires->value.data == NULL) {
266 return NGX_ERROR;
267 }
268
269 if (conf->expires == 0) {
270 ngx_memcpy(expires->value.data, ngx_cached_http_time.data,
271 ngx_cached_http_time.len + 1);
272
273 cc->value.len = sizeof("max-age=0") - 1;
274 cc->value.data = (u_char *) "max-age=0";
275
276 return NGX_OK;
277 }
278
279 ngx_http_time(expires->value.data, ngx_time() + conf->expires);
280
281 if (conf->expires < 0) {
282 cc->value.len = sizeof("no-cache") - 1;
283 cc->value.data = (u_char *) "no-cache";
284
285 return NGX_OK;
286 }
287
288 cc->value.data = ngx_palloc(r->pool,
289 sizeof("max-age=") + NGX_TIME_T_LEN + 1);
290 if (cc->value.data == NULL) {
291 return NGX_ERROR;
292 }
293
294 cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T", conf->expires)
295 - cc->value.data;
296
297 return NGX_OK;
298 }
299
300
301 static ngx_int_t
302 ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv,
303 ngx_str_t *value)
304 {
305 ngx_table_elt_t *h;
306
307 h = ngx_list_push(&r->headers_out.headers);
308 if (h == NULL) {
309 return NGX_ERROR;
310 }
311
312 h->hash = hv->value.hash;
313 h->key = hv->value.key;
314 h->value = *value;
315
316 return NGX_OK;
317 }
318
319
320 static ngx_int_t
321 ngx_http_add_cache_control(ngx_http_request_t *r, ngx_http_header_val_t *hv,
322 ngx_str_t *value)
323 {
324 ngx_table_elt_t *cc, **ccp;
325
326 ccp = r->headers_out.cache_control.elts;
327
328 if (ccp == NULL) {
329
330 if (ngx_array_init(&r->headers_out.cache_control, r->pool,
331 1, sizeof(ngx_table_elt_t *))
332 != NGX_OK)
333 {
334 return NGX_ERROR;
335 }
316 } 336 }
317 337
318 ccp = ngx_array_push(&r->headers_out.cache_control); 338 ccp = ngx_array_push(&r->headers_out.cache_control);
319 if (ccp == NULL) { 339 if (ccp == NULL) {
320 return NGX_ERROR; 340 return NGX_ERROR;
380 } 400 }
381 401
382 /* 402 /*
383 * set by ngx_pcalloc(): 403 * set by ngx_pcalloc():
384 * 404 *
385 * conf->cache_control.len = 0;
386 * conf->cache_control.data = NULL;
387 * conf->headers = NULL; 405 * conf->headers = NULL;
388 */ 406 */
389 407
390 conf->expires = NGX_HTTP_EXPIRES_UNSET; 408 conf->expires = NGX_HTTP_EXPIRES_UNSET;
391 409