Mercurial > hg > nginx
comparison src/http/modules/ngx_http_headers_filter_module.c @ 1363:b0e114fb3bdc
use header specific handler in add_handler,
"Last-Modified" header handler
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 01 Aug 2007 14:01:30 +0000 |
parents | db7c468c447d |
children | b7a8c9fe2337 |
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1362:8dcb9eb5e25a | 1363:b0e114fb3bdc |
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7 #include <ngx_config.h> | 7 #include <ngx_config.h> |
8 #include <ngx_core.h> | 8 #include <ngx_core.h> |
9 #include <ngx_http.h> | 9 #include <ngx_http.h> |
10 | 10 |
11 | 11 |
12 typedef struct ngx_http_header_val_s ngx_http_header_val_t; | |
13 | |
14 typedef ngx_int_t (*ngx_http_set_header_pt)(ngx_http_request_t *r, | |
15 ngx_http_header_val_t *hv, ngx_str_t *value); | |
16 | |
17 | |
12 typedef struct { | 18 typedef struct { |
13 ngx_table_elt_t value; | 19 ngx_str_t name; |
14 ngx_array_t *lengths; | 20 ngx_uint_t offset; |
15 ngx_array_t *values; | 21 ngx_http_set_header_pt handler; |
16 } ngx_http_header_val_t; | 22 } ngx_http_set_header_t; |
23 | |
24 | |
25 struct ngx_http_header_val_s { | |
26 ngx_table_elt_t value; | |
27 ngx_uint_t offset; | |
28 ngx_http_set_header_pt handler; | |
29 ngx_array_t *lengths; | |
30 ngx_array_t *values; | |
31 }; | |
17 | 32 |
18 | 33 |
19 typedef struct { | 34 typedef struct { |
20 time_t expires; | 35 time_t expires; |
21 ngx_str_t cache_control; | 36 ngx_str_t cache_control; |
22 ngx_array_t *headers; | 37 ngx_array_t *headers; |
23 } ngx_http_headers_conf_t; | 38 } ngx_http_headers_conf_t; |
24 | 39 |
25 | 40 |
26 #define NGX_HTTP_EXPIRES_UNSET -2147483647 | 41 #define NGX_HTTP_EXPIRES_UNSET -2147483647 |
27 #define NGX_HTTP_EXPIRES_OFF -2147483646 | 42 #define NGX_HTTP_EXPIRES_OFF -2147483646 |
28 #define NGX_HTTP_EXPIRES_EPOCH -2147483645 | 43 #define NGX_HTTP_EXPIRES_EPOCH -2147483645 |
29 #define NGX_HTTP_EXPIRES_MAX -2147483644 | 44 #define NGX_HTTP_EXPIRES_MAX -2147483644 |
30 | 45 |
46 | |
47 static ngx_int_t ngx_http_add_header(ngx_http_request_t *r, | |
48 ngx_http_header_val_t *hv, ngx_str_t *value); | |
49 static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r, | |
50 ngx_http_header_val_t *hv, ngx_str_t *value); | |
31 | 51 |
32 static void *ngx_http_headers_create_conf(ngx_conf_t *cf); | 52 static void *ngx_http_headers_create_conf(ngx_conf_t *cf); |
33 static char *ngx_http_headers_merge_conf(ngx_conf_t *cf, | 53 static char *ngx_http_headers_merge_conf(ngx_conf_t *cf, |
34 void *parent, void *child); | 54 void *parent, void *child); |
35 static ngx_int_t ngx_http_headers_filter_init(ngx_conf_t *cf); | 55 static ngx_int_t ngx_http_headers_filter_init(ngx_conf_t *cf); |
36 static char *ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, | 56 static char *ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, |
37 void *conf); | 57 void *conf); |
38 static char *ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, | 58 static char *ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, |
39 void *conf); | 59 void *conf); |
60 | |
61 | |
62 static ngx_http_set_header_t ngx_http_set_headers[] = { | |
63 | |
64 { ngx_string("Last-Modified"), | |
65 offsetof(ngx_http_headers_out_t, last_modified), | |
66 ngx_http_set_last_modified }, | |
67 | |
68 { ngx_null_string, 0, NULL } | |
69 }; | |
40 | 70 |
41 | 71 |
42 static ngx_command_t ngx_http_headers_filter_commands[] = { | 72 static ngx_command_t ngx_http_headers_filter_commands[] = { |
43 | 73 |
44 { ngx_string("expires"), | 74 { ngx_string("expires"), |
97 | 127 |
98 static ngx_int_t | 128 static ngx_int_t |
99 ngx_http_headers_filter(ngx_http_request_t *r) | 129 ngx_http_headers_filter(ngx_http_request_t *r) |
100 { | 130 { |
101 size_t len; | 131 size_t len; |
132 ngx_str_t value; | |
102 ngx_uint_t i; | 133 ngx_uint_t i; |
103 ngx_table_elt_t *expires, *cc, **ccp, *out; | 134 ngx_table_elt_t *expires, *cc, **ccp; |
104 ngx_http_header_val_t *h; | 135 ngx_http_header_val_t *h; |
105 ngx_http_headers_conf_t *conf; | 136 ngx_http_headers_conf_t *conf; |
106 | 137 |
107 if (r != r->main | 138 if (r != r->main |
108 || (r->headers_out.status != NGX_HTTP_OK | 139 || (r->headers_out.status != NGX_HTTP_OK |
253 } | 284 } |
254 | 285 |
255 if (conf->headers) { | 286 if (conf->headers) { |
256 h = conf->headers->elts; | 287 h = conf->headers->elts; |
257 for (i = 0; i < conf->headers->nelts; i++) { | 288 for (i = 0; i < conf->headers->nelts; i++) { |
258 out = ngx_list_push(&r->headers_out.headers); | |
259 if (out == NULL) { | |
260 return NGX_ERROR; | |
261 } | |
262 | |
263 out->hash = h[i].value.hash; | |
264 out->key = h[i].value.key; | |
265 | 289 |
266 if (h[i].lengths == NULL) { | 290 if (h[i].lengths == NULL) { |
267 out->value = h[i].value.value; | 291 value = h[i].value.value; |
268 continue; | 292 |
269 } | 293 } else { |
270 | 294 if (ngx_http_script_run(r, &value, h[i].lengths->elts, 0, |
271 if (ngx_http_script_run(r, &out->value, h[i].lengths->elts, 0, | 295 h[i].values->elts) |
272 h[i].values->elts) | 296 == NULL) |
273 == NULL) | 297 { |
274 { | 298 return NGX_ERROR; |
299 } | |
300 } | |
301 | |
302 if (h[i].handler(r, &h[i], &value) != NGX_OK) { | |
275 return NGX_ERROR; | 303 return NGX_ERROR; |
276 } | 304 } |
277 } | 305 } |
278 } | 306 } |
279 | 307 |
280 return ngx_http_next_header_filter(r); | 308 return ngx_http_next_header_filter(r); |
309 } | |
310 | |
311 | |
312 static ngx_int_t | |
313 ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv, | |
314 ngx_str_t *value) | |
315 { | |
316 ngx_table_elt_t *h; | |
317 | |
318 h = ngx_list_push(&r->headers_out.headers); | |
319 if (h == NULL) { | |
320 return NGX_ERROR; | |
321 } | |
322 | |
323 h->hash = hv->value.hash; | |
324 h->key = hv->value.key; | |
325 h->value = *value; | |
326 | |
327 return NGX_OK; | |
328 } | |
329 | |
330 | |
331 static ngx_int_t | |
332 ngx_http_set_last_modified(ngx_http_request_t *r, ngx_http_header_val_t *hv, | |
333 ngx_str_t *value) | |
334 { | |
335 ngx_table_elt_t *h, **old; | |
336 | |
337 if (hv->offset) { | |
338 old = (ngx_table_elt_t **) ((char *) &r->headers_out + hv->offset); | |
339 | |
340 } else { | |
341 old = NULL; | |
342 } | |
343 | |
344 if (old == NULL || *old == NULL) { | |
345 h = ngx_list_push(&r->headers_out.headers); | |
346 if (h == NULL) { | |
347 return NGX_ERROR; | |
348 } | |
349 | |
350 } else { | |
351 h = *old; | |
352 } | |
353 | |
354 h->hash = hv->value.hash; | |
355 h->key = hv->value.key; | |
356 h->value = *value; | |
357 | |
358 r->headers_out.last_modified_time = -1; | |
359 | |
360 return NGX_OK; | |
281 } | 361 } |
282 | 362 |
283 | 363 |
284 static void * | 364 static void * |
285 ngx_http_headers_create_conf(ngx_conf_t *cf) | 365 ngx_http_headers_create_conf(ngx_conf_t *cf) |
404 { | 484 { |
405 ngx_http_headers_conf_t *hcf = conf; | 485 ngx_http_headers_conf_t *hcf = conf; |
406 | 486 |
407 ngx_int_t n; | 487 ngx_int_t n; |
408 ngx_str_t *value; | 488 ngx_str_t *value; |
489 ngx_uint_t i; | |
409 ngx_http_header_val_t *h; | 490 ngx_http_header_val_t *h; |
491 ngx_http_set_header_t *sh; | |
410 ngx_http_script_compile_t sc; | 492 ngx_http_script_compile_t sc; |
411 | 493 |
412 value = cf->args->elts; | 494 value = cf->args->elts; |
413 | 495 |
414 if (ngx_strcasecmp(value[1].data, (u_char *) "cache-control") == 0) { | 496 if (ngx_strcasecmp(value[1].data, (u_char *) "cache-control") == 0) { |
430 } | 512 } |
431 | 513 |
432 h->value.hash = 1; | 514 h->value.hash = 1; |
433 h->value.key = value[1]; | 515 h->value.key = value[1]; |
434 h->value.value = value[2]; | 516 h->value.value = value[2]; |
517 h->offset = 0; | |
518 h->handler = ngx_http_add_header; | |
435 h->lengths = NULL; | 519 h->lengths = NULL; |
436 h->values = NULL; | 520 h->values = NULL; |
521 | |
522 sh = ngx_http_set_headers; | |
523 for (i = 0; sh[i].name.len; i++) { | |
524 if (ngx_strcasecmp(value[1].data, sh[i].name.data) != 0) { | |
525 continue; | |
526 } | |
527 | |
528 h->offset = sh[i].offset; | |
529 h->handler = sh[i].handler; | |
530 break; | |
531 } | |
437 | 532 |
438 n = ngx_http_script_variables_count(&value[2]); | 533 n = ngx_http_script_variables_count(&value[2]); |
439 | 534 |
440 if (n == 0) { | 535 if (n == 0) { |
441 return NGX_CONF_OK; | 536 return NGX_CONF_OK; |