Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_sub_filter_module.c @ 2412:086c20fe2e97
set default gzip_buffers to 32 4k or 16 8k
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 16 Dec 2008 16:15:52 +0000 |
parents | 723df5089c05 |
children | cc13ff6d5c07 |
rev | line source |
---|---|
1172 | 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 ngx_str_t match; | |
14 ngx_str_t sub; | |
15 | |
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use hash in gzip_types, ssi_types, and sub_filter_types
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parents:
2135
diff
changeset
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16 ngx_hash_t types; |
1172 | 17 |
18 ngx_array_t *sub_lengths; | |
19 ngx_array_t *sub_values; | |
20 | |
21 ngx_flag_t once; | |
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use hash in gzip_types, ssi_types, and sub_filter_types
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parents:
2135
diff
changeset
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22 |
723df5089c05
use hash in gzip_types, ssi_types, and sub_filter_types
Igor Sysoev <igor@sysoev.ru>
parents:
2135
diff
changeset
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23 ngx_array_t *types_keys; |
1172 | 24 } ngx_http_sub_loc_conf_t; |
25 | |
26 | |
27 typedef enum { | |
28 sub_start_state = 0, | |
29 sub_match_state, | |
30 } ngx_http_sub_state_e; | |
31 | |
32 | |
33 typedef struct { | |
34 ngx_str_t match; | |
35 | |
36 ngx_uint_t once; /* unsigned once:1 */ | |
37 | |
38 ngx_buf_t *buf; | |
39 | |
40 u_char *pos; | |
41 u_char *copy_start; | |
42 u_char *copy_end; | |
43 | |
44 ngx_chain_t *in; | |
45 ngx_chain_t *out; | |
46 ngx_chain_t **last_out; | |
47 ngx_chain_t *busy; | |
48 ngx_chain_t *free; | |
49 | |
50 ngx_str_t sub; | |
51 | |
52 ngx_uint_t state; | |
53 size_t saved; | |
54 size_t looked; | |
55 } ngx_http_sub_ctx_t; | |
56 | |
57 | |
58 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r, | |
59 ngx_http_sub_ctx_t *ctx); | |
60 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, | |
61 ngx_http_sub_ctx_t *ctx); | |
62 | |
63 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
64 void *conf); | |
65 static void *ngx_http_sub_create_conf(ngx_conf_t *cf); | |
66 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf, | |
67 void *parent, void *child); | |
68 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf); | |
69 | |
70 | |
71 static ngx_command_t ngx_http_sub_filter_commands[] = { | |
72 | |
73 { ngx_string("sub_filter"), | |
74 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
75 ngx_http_sub_filter, | |
76 NGX_HTTP_LOC_CONF_OFFSET, | |
77 0, | |
78 NULL }, | |
79 | |
80 { ngx_string("sub_filter_types"), | |
81 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
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82 ngx_http_types_slot, |
1172 | 83 NGX_HTTP_LOC_CONF_OFFSET, |
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use hash in gzip_types, ssi_types, and sub_filter_types
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parents:
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diff
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84 offsetof(ngx_http_sub_loc_conf_t, types_keys), |
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use hash in gzip_types, ssi_types, and sub_filter_types
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parents:
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diff
changeset
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85 &ngx_http_html_default_types[0] }, |
1172 | 86 |
87 { ngx_string("sub_filter_once"), | |
88 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
89 ngx_conf_set_flag_slot, | |
90 NGX_HTTP_LOC_CONF_OFFSET, | |
91 offsetof(ngx_http_sub_loc_conf_t, once), | |
92 NULL }, | |
93 | |
94 ngx_null_command | |
95 }; | |
96 | |
97 | |
98 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
99 NULL, /* preconfiguration */ | |
100 ngx_http_sub_filter_init, /* postconfiguration */ | |
101 | |
102 NULL, /* create main configuration */ | |
103 NULL, /* init main configuration */ | |
104 | |
105 NULL, /* create server configuration */ | |
106 NULL, /* merge server configuration */ | |
107 | |
108 ngx_http_sub_create_conf, /* create location configuration */ | |
109 ngx_http_sub_merge_conf /* merge location configuration */ | |
110 }; | |
111 | |
112 | |
113 ngx_module_t ngx_http_sub_filter_module = { | |
114 NGX_MODULE_V1, | |
115 &ngx_http_sub_filter_module_ctx, /* module context */ | |
116 ngx_http_sub_filter_commands, /* module directives */ | |
117 NGX_HTTP_MODULE, /* module type */ | |
118 NULL, /* init master */ | |
119 NULL, /* init module */ | |
120 NULL, /* init process */ | |
121 NULL, /* init thread */ | |
122 NULL, /* exit thread */ | |
123 NULL, /* exit process */ | |
124 NULL, /* exit master */ | |
125 NGX_MODULE_V1_PADDING | |
126 }; | |
127 | |
128 | |
129 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
130 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
131 | |
132 | |
133 static ngx_int_t | |
134 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
135 { | |
136 ngx_http_sub_ctx_t *ctx; | |
137 ngx_http_sub_loc_conf_t *slcf; | |
138 | |
139 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
140 | |
141 if (slcf->match.len == 0 | |
2166
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use hash in gzip_types, ssi_types, and sub_filter_types
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parents:
2135
diff
changeset
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142 || r->headers_out.content_length_n == 0 |
723df5089c05
use hash in gzip_types, ssi_types, and sub_filter_types
Igor Sysoev <igor@sysoev.ru>
parents:
2135
diff
changeset
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143 || ngx_http_test_content_type(r, &slcf->types) == NULL) |
1172 | 144 { |
145 return ngx_http_next_header_filter(r); | |
146 } | |
147 | |
148 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
149 if (ctx == NULL) { | |
150 return NGX_ERROR; | |
151 } | |
152 | |
153 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); | |
154 | |
155 ctx->match = slcf->match; | |
156 ctx->last_out = &ctx->out; | |
157 ctx->sub = slcf->sub; | |
158 | |
159 r->filter_need_in_memory = 1; | |
160 | |
161 if (r == r->main) { | |
162 ngx_http_clear_content_length(r); | |
163 ngx_http_clear_last_modified(r); | |
164 } | |
165 | |
166 return ngx_http_next_header_filter(r); | |
167 } | |
168 | |
169 | |
170 static ngx_int_t | |
171 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
172 { | |
173 ngx_int_t rc; | |
174 ngx_buf_t *b; | |
175 ngx_chain_t *cl; | |
176 ngx_http_sub_ctx_t *ctx; | |
177 ngx_http_sub_loc_conf_t *slcf; | |
178 | |
179 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
180 | |
181 if (ctx == NULL) { | |
182 return ngx_http_next_body_filter(r, in); | |
183 } | |
184 | |
185 if ((in == NULL | |
186 && ctx->buf == NULL | |
187 && ctx->in == NULL | |
188 && ctx->busy == NULL)) | |
189 { | |
190 return ngx_http_next_body_filter(r, in); | |
191 } | |
192 | |
193 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
194 | |
195 if (ctx->busy) { | |
196 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
197 return NGX_ERROR; | |
198 } | |
199 } | |
200 | |
201 return ngx_http_next_body_filter(r, in); | |
202 } | |
203 | |
204 /* add the incoming chain to the chain ctx->in */ | |
205 | |
206 if (in) { | |
207 if (ngx_chain_add_copy(r->pool, &ctx->in, in) == NGX_ERROR) { | |
208 return NGX_ERROR; | |
209 } | |
210 } | |
211 | |
212 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
213 "http sub filter \"%V\"", &r->uri); | |
214 | |
215 while (ctx->in || ctx->buf) { | |
216 | |
217 if (ctx->buf == NULL ){ | |
218 ctx->buf = ctx->in->buf; | |
219 ctx->in = ctx->in->next; | |
220 ctx->pos = ctx->buf->pos; | |
221 } | |
222 | |
223 if (ctx->state == sub_start_state) { | |
224 ctx->copy_start = ctx->pos; | |
225 ctx->copy_end = ctx->pos; | |
226 } | |
227 | |
228 b = NULL; | |
229 | |
230 while (ctx->pos < ctx->buf->last) { | |
231 | |
232 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
233 "saved: %d state: %d", ctx->saved, ctx->state); | |
234 | |
235 rc = ngx_http_sub_parse(r, ctx); | |
236 | |
237 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
238 "parse: %d, looked: %d %p-%p", | |
239 rc, ctx->looked, ctx->copy_start, ctx->copy_end); | |
240 | |
241 if (rc == NGX_ERROR) { | |
242 return rc; | |
243 } | |
244 | |
245 if (ctx->copy_start != ctx->copy_end) { | |
246 | |
247 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
248 "saved: %d", ctx->saved); | |
249 | |
250 if (ctx->saved) { | |
251 | |
252 if (ctx->free) { | |
253 cl = ctx->free; | |
254 ctx->free = ctx->free->next; | |
255 b = cl->buf; | |
256 ngx_memzero(b, sizeof(ngx_buf_t)); | |
257 | |
258 } else { | |
259 b = ngx_calloc_buf(r->pool); | |
260 if (b == NULL) { | |
261 return NGX_ERROR; | |
262 } | |
263 | |
264 cl = ngx_alloc_chain_link(r->pool); | |
265 if (cl == NULL) { | |
266 return NGX_ERROR; | |
267 } | |
268 | |
269 cl->buf = b; | |
270 } | |
271 | |
272 b->memory = 1; | |
273 b->pos = ctx->match.data; | |
274 b->last = ctx->match.data + ctx->saved; | |
275 | |
276 *ctx->last_out = cl; | |
277 ctx->last_out = &cl->next; | |
278 | |
279 ctx->saved = 0; | |
280 } | |
281 | |
282 if (ctx->free) { | |
283 cl = ctx->free; | |
284 ctx->free = ctx->free->next; | |
285 b = cl->buf; | |
286 | |
287 } else { | |
288 b = ngx_alloc_buf(r->pool); | |
289 if (b == NULL) { | |
290 return NGX_ERROR; | |
291 } | |
292 | |
293 cl = ngx_alloc_chain_link(r->pool); | |
294 if (cl == NULL) { | |
295 return NGX_ERROR; | |
296 } | |
297 | |
298 cl->buf = b; | |
299 } | |
300 | |
301 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
302 | |
303 b->pos = ctx->copy_start; | |
304 b->last = ctx->copy_end; | |
305 b->shadow = NULL; | |
306 b->last_buf = 0; | |
307 b->recycled = 0; | |
308 | |
309 if (b->in_file) { | |
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fix error when response parsed by sub filter, then by SSI filter
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310 b->file_last = b->file_pos + (b->last - ctx->buf->pos); |
333ef9e18a59
fix error when response parsed by sub filter, then by SSI filter
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parents:
2049
diff
changeset
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311 b->file_pos += b->pos - ctx->buf->pos; |
1172 | 312 } |
313 | |
314 cl->next = NULL; | |
315 *ctx->last_out = cl; | |
316 ctx->last_out = &cl->next; | |
317 } | |
318 | |
319 if (ctx->state == sub_start_state) { | |
320 ctx->copy_start = ctx->pos; | |
321 ctx->copy_end = ctx->pos; | |
322 | |
323 } else { | |
324 ctx->copy_start = NULL; | |
325 ctx->copy_end = NULL; | |
326 } | |
327 | |
328 if (rc == NGX_AGAIN) { | |
329 continue; | |
330 } | |
331 | |
332 | |
333 /* rc == NGX_OK */ | |
334 | |
335 b = ngx_calloc_buf(r->pool); | |
336 if (b == NULL) { | |
337 return NGX_ERROR; | |
338 } | |
339 | |
340 cl = ngx_alloc_chain_link(r->pool); | |
341 if (cl == NULL) { | |
342 return NGX_ERROR; | |
343 } | |
344 | |
345 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
346 | |
347 if (ctx->sub.data == NULL) { | |
348 | |
349 if (ngx_http_script_run(r, &ctx->sub, slcf->sub_lengths->elts, | |
350 0, slcf->sub_values->elts) | |
351 == NULL) | |
352 { | |
353 return NGX_ERROR; | |
354 } | |
355 } | |
356 | |
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357 if (ctx->sub.len) { |
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parents:
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358 b->memory = 1; |
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359 b->pos = ctx->sub.data; |
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parents:
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diff
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360 b->last = ctx->sub.data + ctx->sub.len; |
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361 |
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parents:
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362 } else { |
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363 b->sync = 1; |
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parents:
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364 } |
1172 | 365 |
366 cl->buf = b; | |
367 cl->next = NULL; | |
368 *ctx->last_out = cl; | |
369 ctx->last_out = &cl->next; | |
370 | |
371 ctx->once = slcf->once; | |
372 | |
373 continue; | |
374 } | |
375 | |
376 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
377 if (b == NULL) { | |
378 if (ctx->free) { | |
379 cl = ctx->free; | |
380 ctx->free = ctx->free->next; | |
381 b = cl->buf; | |
382 ngx_memzero(b, sizeof(ngx_buf_t)); | |
383 | |
384 } else { | |
385 b = ngx_calloc_buf(r->pool); | |
386 if (b == NULL) { | |
387 return NGX_ERROR; | |
388 } | |
389 | |
390 cl = ngx_alloc_chain_link(r->pool); | |
391 if (cl == NULL) { | |
392 return NGX_ERROR; | |
393 } | |
394 | |
395 cl->buf = b; | |
396 } | |
397 | |
398 b->sync = 1; | |
399 | |
400 cl->next = NULL; | |
401 *ctx->last_out = cl; | |
402 ctx->last_out = &cl->next; | |
403 } | |
404 | |
405 b->last_buf = ctx->buf->last_buf; | |
406 b->shadow = ctx->buf; | |
407 | |
408 b->recycled = ctx->buf->recycled; | |
409 } | |
410 | |
411 ctx->buf = NULL; | |
412 | |
413 ctx->saved = ctx->looked; | |
414 } | |
415 | |
416 if (ctx->out == NULL && ctx->busy == NULL) { | |
417 return NGX_OK; | |
418 } | |
419 | |
420 return ngx_http_sub_output(r, ctx); | |
421 } | |
422 | |
423 | |
424 static ngx_int_t | |
425 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
426 { | |
427 ngx_int_t rc; | |
428 ngx_buf_t *b; | |
429 ngx_chain_t *cl; | |
430 | |
431 #if 1 | |
432 b = NULL; | |
433 for (cl = ctx->out; cl; cl = cl->next) { | |
434 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
435 "sub out: %p %p", cl->buf, cl->buf->pos); | |
436 if (cl->buf == b) { | |
437 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
438 "the same buf was used in sub"); | |
439 ngx_debug_point(); | |
440 return NGX_ERROR; | |
441 } | |
442 b = cl->buf; | |
443 } | |
444 #endif | |
445 | |
446 rc = ngx_http_next_body_filter(r, ctx->out); | |
447 | |
448 if (ctx->busy == NULL) { | |
449 ctx->busy = ctx->out; | |
450 | |
451 } else { | |
452 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
453 cl->next = ctx->out; | |
454 } | |
455 | |
456 ctx->out = NULL; | |
457 ctx->last_out = &ctx->out; | |
458 | |
459 while (ctx->busy) { | |
460 | |
461 cl = ctx->busy; | |
462 b = cl->buf; | |
463 | |
464 if (ngx_buf_size(b) != 0) { | |
465 break; | |
466 } | |
467 | |
468 #if (NGX_HAVE_WRITE_ZEROCOPY) | |
469 if (b->zerocopy_busy) { | |
470 break; | |
471 } | |
472 #endif | |
473 | |
474 if (b->shadow) { | |
475 b->shadow->pos = b->shadow->last; | |
476 } | |
477 | |
478 ctx->busy = cl->next; | |
479 | |
480 if (ngx_buf_in_memory(b) || b->in_file) { | |
481 /* add data bufs only to the free buf chain */ | |
482 | |
483 cl->next = ctx->free; | |
484 ctx->free = cl; | |
485 } | |
486 } | |
487 | |
488 if (ctx->in || ctx->buf) { | |
489 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
490 | |
491 } else { | |
492 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
493 } | |
494 | |
495 return rc; | |
496 } | |
497 | |
498 | |
499 static ngx_int_t | |
500 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
501 { | |
502 u_char *p, *last, *copy_end, ch, match; | |
503 size_t looked; | |
504 ngx_http_sub_state_e state; | |
505 | |
506 if (ctx->once) { | |
507 ctx->copy_start = ctx->pos; | |
508 ctx->copy_end = ctx->buf->last; | |
509 ctx->pos = ctx->buf->last; | |
510 ctx->looked = 0; | |
511 | |
512 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
513 | |
514 return NGX_AGAIN; | |
515 } | |
516 | |
517 state = ctx->state; | |
518 looked = ctx->looked; | |
519 last = ctx->buf->last; | |
520 copy_end = ctx->copy_end; | |
521 | |
522 for (p = ctx->pos; p < last; p++) { | |
523 | |
524 ch = *p; | |
525 ch = ngx_tolower(ch); | |
526 | |
527 if (state == sub_start_state) { | |
528 | |
529 /* the tight loop */ | |
530 | |
531 match = ctx->match.data[0]; | |
532 | |
533 for ( ;; ) { | |
534 if (ch == match) { | |
535 copy_end = p; | |
536 looked = 1; | |
537 state = sub_match_state; | |
538 | |
539 goto match_started; | |
540 } | |
541 | |
542 if (++p == last) { | |
543 break; | |
544 } | |
545 | |
546 ch = *p; | |
547 ch = ngx_tolower(ch); | |
548 } | |
549 | |
1557
9d094e581587
*) add sub_filter parser fix similar to r1261 in SSI parser
Igor Sysoev <igor@sysoev.ru>
parents:
1555
diff
changeset
|
550 ctx->state = state; |
1172 | 551 ctx->pos = p; |
552 ctx->looked = looked; | |
553 ctx->copy_end = p; | |
554 | |
555 if (ctx->copy_start == NULL) { | |
556 ctx->copy_start = ctx->buf->pos; | |
557 } | |
558 | |
559 return NGX_AGAIN; | |
560 | |
561 match_started: | |
562 | |
563 continue; | |
564 } | |
565 | |
566 /* state == sub_match_state */ | |
567 | |
568 if (ch == ctx->match.data[looked]) { | |
569 looked++; | |
570 | |
571 if (looked == ctx->match.len) { | |
1557
9d094e581587
*) add sub_filter parser fix similar to r1261 in SSI parser
Igor Sysoev <igor@sysoev.ru>
parents:
1555
diff
changeset
|
572 if ((size_t) (p - ctx->pos) < looked) { |
9d094e581587
*) add sub_filter parser fix similar to r1261 in SSI parser
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573 ctx->saved = 0; |
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574 } |
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575 |
1172 | 576 ctx->state = sub_start_state; |
577 ctx->pos = p + 1; | |
1978 | 578 ctx->looked = 0; |
1172 | 579 ctx->copy_end = copy_end; |
580 | |
581 if (ctx->copy_start == NULL && copy_end) { | |
582 ctx->copy_start = ctx->buf->pos; | |
583 } | |
584 | |
585 return NGX_OK; | |
586 } | |
587 | |
588 } else if (ch == ctx->match.data[0]) { | |
589 copy_end = p; | |
590 looked = 1; | |
591 | |
592 } else { | |
593 copy_end = p; | |
594 looked = 0; | |
595 state = sub_start_state; | |
596 } | |
597 } | |
598 | |
599 ctx->state = state; | |
600 ctx->pos = p; | |
601 ctx->looked = looked; | |
602 | |
603 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
604 | |
605 if (ctx->copy_start == NULL && ctx->copy_end) { | |
606 ctx->copy_start = ctx->buf->pos; | |
607 } | |
608 | |
609 return NGX_AGAIN; | |
610 } | |
611 | |
612 | |
613 static char * | |
614 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
615 { | |
616 ngx_http_sub_loc_conf_t *slcf = conf; | |
617 | |
618 ngx_str_t *value; | |
619 ngx_int_t n; | |
620 ngx_http_script_compile_t sc; | |
621 | |
622 if (slcf->match.len) { | |
623 return "is duplicate"; | |
624 } | |
625 | |
626 value = cf->args->elts; | |
627 | |
2135 | 628 ngx_strlow(value[1].data, value[1].data, value[1].len); |
1172 | 629 |
2135 | 630 slcf->match = value[1]; |
1172 | 631 |
632 n = ngx_http_script_variables_count(&value[2]); | |
633 | |
634 if (n == 0) { | |
635 slcf->sub = value[2]; | |
636 return NGX_CONF_OK; | |
637 } | |
638 | |
639 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t)); | |
640 | |
641 sc.cf = cf; | |
642 sc.source = &value[2]; | |
643 sc.lengths = &slcf->sub_lengths; | |
644 sc.values = &slcf->sub_values; | |
645 sc.variables = n; | |
646 sc.complete_lengths = 1; | |
647 sc.complete_values = 1; | |
648 | |
649 if (ngx_http_script_compile(&sc) != NGX_OK) { | |
650 return NGX_CONF_ERROR; | |
651 } | |
652 | |
653 return NGX_CONF_OK; | |
654 } | |
655 | |
656 | |
657 static void * | |
658 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
659 { | |
660 ngx_http_sub_loc_conf_t *slcf; | |
661 | |
662 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
663 if (slcf == NULL) { | |
664 return NGX_CONF_ERROR; | |
665 } | |
666 | |
667 /* | |
668 * set by ngx_pcalloc(): | |
669 * | |
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670 * conf->match = { 0, NULL }; |
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671 * conf->sub = { 0, NULL }; |
1172 | 672 * conf->sub_lengths = NULL; |
673 * conf->sub_values = NULL; | |
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674 * conf->types = { NULL }; |
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675 * conf->types_keys = NULL; |
1172 | 676 */ |
677 | |
678 slcf->once = NGX_CONF_UNSET; | |
679 | |
680 return slcf; | |
681 } | |
682 | |
683 | |
684 static char * | |
685 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
686 { | |
687 ngx_http_sub_loc_conf_t *prev = parent; | |
688 ngx_http_sub_loc_conf_t *conf = child; | |
689 | |
690 ngx_conf_merge_value(conf->once, prev->once, 1); | |
691 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
692 | |
693 if (conf->sub.data == NULL && conf->sub_lengths == NULL) { | |
694 conf->sub = prev->sub; | |
695 conf->sub_lengths = prev->sub_lengths; | |
696 conf->sub_values = prev->sub_values; | |
697 } | |
698 | |
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699 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types, |
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700 prev->types_keys, &prev->types, |
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701 ngx_http_html_default_types) |
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702 != NGX_OK) |
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703 { |
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704 return NGX_CONF_ERROR; |
1172 | 705 } |
706 | |
707 return NGX_CONF_OK; | |
708 } | |
709 | |
710 | |
711 static ngx_int_t | |
712 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
713 { | |
714 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
715 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
716 | |
717 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
718 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
719 | |
720 return NGX_OK; | |
721 } |