Mercurial > hg > nginx
annotate src/http/modules/ngx_http_sub_filter_module.c @ 5197:2ba8bb27114e
Version bump.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Sat, 11 May 2013 18:43:28 +0400 |
parents | 4251e72b8bb4 |
children | 4c1a604b0285 |
rev | line source |
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1172 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4412 | 4 * Copyright (C) Nginx, Inc. |
1172 | 5 */ |
6 | |
7 | |
8 #include <ngx_config.h> | |
9 #include <ngx_core.h> | |
10 #include <ngx_http.h> | |
11 | |
12 | |
13 typedef struct { | |
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14 ngx_str_t match; |
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15 ngx_http_complex_value_t value; |
1172 | 16 |
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17 ngx_hash_t types; |
1172 | 18 |
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19 ngx_flag_t once; |
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20 |
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21 ngx_array_t *types_keys; |
1172 | 22 } ngx_http_sub_loc_conf_t; |
23 | |
24 | |
25 typedef enum { | |
26 sub_start_state = 0, | |
27 sub_match_state, | |
28 } ngx_http_sub_state_e; | |
29 | |
30 | |
31 typedef struct { | |
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32 ngx_str_t match; |
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33 ngx_str_t saved; |
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34 ngx_str_t looked; |
1172 | 35 |
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36 ngx_uint_t once; /* unsigned once:1 */ |
1172 | 37 |
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38 ngx_buf_t *buf; |
1172 | 39 |
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40 u_char *pos; |
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41 u_char *copy_start; |
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42 u_char *copy_end; |
1172 | 43 |
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44 ngx_chain_t *in; |
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45 ngx_chain_t *out; |
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46 ngx_chain_t **last_out; |
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47 ngx_chain_t *busy; |
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48 ngx_chain_t *free; |
1172 | 49 |
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50 ngx_str_t sub; |
1172 | 51 |
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52 ngx_uint_t state; |
1172 | 53 } ngx_http_sub_ctx_t; |
54 | |
55 | |
56 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r, | |
57 ngx_http_sub_ctx_t *ctx); | |
58 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, | |
59 ngx_http_sub_ctx_t *ctx); | |
60 | |
61 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
62 void *conf); | |
63 static void *ngx_http_sub_create_conf(ngx_conf_t *cf); | |
64 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf, | |
65 void *parent, void *child); | |
66 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf); | |
67 | |
68 | |
69 static ngx_command_t ngx_http_sub_filter_commands[] = { | |
70 | |
71 { ngx_string("sub_filter"), | |
72 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
73 ngx_http_sub_filter, | |
74 NGX_HTTP_LOC_CONF_OFFSET, | |
75 0, | |
76 NULL }, | |
77 | |
78 { ngx_string("sub_filter_types"), | |
79 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
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80 ngx_http_types_slot, |
1172 | 81 NGX_HTTP_LOC_CONF_OFFSET, |
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82 offsetof(ngx_http_sub_loc_conf_t, types_keys), |
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83 &ngx_http_html_default_types[0] }, |
1172 | 84 |
85 { ngx_string("sub_filter_once"), | |
86 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
87 ngx_conf_set_flag_slot, | |
88 NGX_HTTP_LOC_CONF_OFFSET, | |
89 offsetof(ngx_http_sub_loc_conf_t, once), | |
90 NULL }, | |
91 | |
92 ngx_null_command | |
93 }; | |
94 | |
95 | |
96 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
97 NULL, /* preconfiguration */ | |
98 ngx_http_sub_filter_init, /* postconfiguration */ | |
99 | |
100 NULL, /* create main configuration */ | |
101 NULL, /* init main configuration */ | |
102 | |
103 NULL, /* create server configuration */ | |
104 NULL, /* merge server configuration */ | |
105 | |
106 ngx_http_sub_create_conf, /* create location configuration */ | |
107 ngx_http_sub_merge_conf /* merge location configuration */ | |
108 }; | |
109 | |
110 | |
111 ngx_module_t ngx_http_sub_filter_module = { | |
112 NGX_MODULE_V1, | |
113 &ngx_http_sub_filter_module_ctx, /* module context */ | |
114 ngx_http_sub_filter_commands, /* module directives */ | |
115 NGX_HTTP_MODULE, /* module type */ | |
116 NULL, /* init master */ | |
117 NULL, /* init module */ | |
118 NULL, /* init process */ | |
119 NULL, /* init thread */ | |
120 NULL, /* exit thread */ | |
121 NULL, /* exit process */ | |
122 NULL, /* exit master */ | |
123 NGX_MODULE_V1_PADDING | |
124 }; | |
125 | |
126 | |
127 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
128 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
129 | |
130 | |
131 static ngx_int_t | |
132 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
133 { | |
134 ngx_http_sub_ctx_t *ctx; | |
135 ngx_http_sub_loc_conf_t *slcf; | |
136 | |
137 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
138 | |
139 if (slcf->match.len == 0 | |
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140 || r->headers_out.content_length_n == 0 |
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141 || ngx_http_test_content_type(r, &slcf->types) == NULL) |
1172 | 142 { |
143 return ngx_http_next_header_filter(r); | |
144 } | |
145 | |
146 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
147 if (ctx == NULL) { | |
148 return NGX_ERROR; | |
149 } | |
150 | |
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151 ctx->saved.data = ngx_pnalloc(r->pool, slcf->match.len); |
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152 if (ctx->saved.data == NULL) { |
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153 return NGX_ERROR; |
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154 } |
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155 |
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156 ctx->looked.data = ngx_pnalloc(r->pool, slcf->match.len); |
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157 if (ctx->looked.data == NULL) { |
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158 return NGX_ERROR; |
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159 } |
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160 |
1172 | 161 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); |
162 | |
163 ctx->match = slcf->match; | |
164 ctx->last_out = &ctx->out; | |
165 | |
166 r->filter_need_in_memory = 1; | |
167 | |
168 if (r == r->main) { | |
169 ngx_http_clear_content_length(r); | |
170 ngx_http_clear_last_modified(r); | |
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171 ngx_http_clear_etag(r); |
1172 | 172 } |
173 | |
174 return ngx_http_next_header_filter(r); | |
175 } | |
176 | |
177 | |
178 static ngx_int_t | |
179 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
180 { | |
181 ngx_int_t rc; | |
182 ngx_buf_t *b; | |
183 ngx_chain_t *cl; | |
184 ngx_http_sub_ctx_t *ctx; | |
185 ngx_http_sub_loc_conf_t *slcf; | |
186 | |
187 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
188 | |
189 if (ctx == NULL) { | |
190 return ngx_http_next_body_filter(r, in); | |
191 } | |
192 | |
193 if ((in == NULL | |
194 && ctx->buf == NULL | |
195 && ctx->in == NULL | |
196 && ctx->busy == NULL)) | |
197 { | |
198 return ngx_http_next_body_filter(r, in); | |
199 } | |
200 | |
201 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
202 | |
203 if (ctx->busy) { | |
204 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
205 return NGX_ERROR; | |
206 } | |
207 } | |
208 | |
209 return ngx_http_next_body_filter(r, in); | |
210 } | |
211 | |
212 /* add the incoming chain to the chain ctx->in */ | |
213 | |
214 if (in) { | |
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215 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { |
1172 | 216 return NGX_ERROR; |
217 } | |
218 } | |
219 | |
220 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
221 "http sub filter \"%V\"", &r->uri); | |
222 | |
223 while (ctx->in || ctx->buf) { | |
224 | |
3642 | 225 if (ctx->buf == NULL) { |
1172 | 226 ctx->buf = ctx->in->buf; |
227 ctx->in = ctx->in->next; | |
228 ctx->pos = ctx->buf->pos; | |
229 } | |
230 | |
231 if (ctx->state == sub_start_state) { | |
232 ctx->copy_start = ctx->pos; | |
233 ctx->copy_end = ctx->pos; | |
234 } | |
235 | |
236 b = NULL; | |
237 | |
238 while (ctx->pos < ctx->buf->last) { | |
239 | |
240 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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241 "saved: \"%V\" state: %d", &ctx->saved, ctx->state); |
1172 | 242 |
243 rc = ngx_http_sub_parse(r, ctx); | |
244 | |
245 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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246 "parse: %d, looked: \"%V\" %p-%p", |
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247 rc, &ctx->looked, ctx->copy_start, ctx->copy_end); |
1172 | 248 |
249 if (rc == NGX_ERROR) { | |
250 return rc; | |
251 } | |
252 | |
253 if (ctx->copy_start != ctx->copy_end) { | |
254 | |
255 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
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256 "saved: \"%V\"", &ctx->saved); |
1172 | 257 |
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258 if (ctx->saved.len) { |
1172 | 259 |
260 if (ctx->free) { | |
261 cl = ctx->free; | |
262 ctx->free = ctx->free->next; | |
263 b = cl->buf; | |
264 ngx_memzero(b, sizeof(ngx_buf_t)); | |
265 | |
266 } else { | |
267 b = ngx_calloc_buf(r->pool); | |
268 if (b == NULL) { | |
269 return NGX_ERROR; | |
270 } | |
271 | |
272 cl = ngx_alloc_chain_link(r->pool); | |
273 if (cl == NULL) { | |
274 return NGX_ERROR; | |
275 } | |
276 | |
277 cl->buf = b; | |
278 } | |
279 | |
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280 b->pos = ngx_pnalloc(r->pool, ctx->saved.len); |
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281 if (b->pos == NULL) { |
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282 return NGX_ERROR; |
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283 } |
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284 |
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285 ngx_memcpy(b->pos, ctx->saved.data, ctx->saved.len); |
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286 b->last = b->pos + ctx->saved.len; |
1172 | 287 b->memory = 1; |
288 | |
289 *ctx->last_out = cl; | |
290 ctx->last_out = &cl->next; | |
291 | |
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292 ctx->saved.len = 0; |
1172 | 293 } |
294 | |
295 if (ctx->free) { | |
296 cl = ctx->free; | |
297 ctx->free = ctx->free->next; | |
298 b = cl->buf; | |
299 | |
300 } else { | |
301 b = ngx_alloc_buf(r->pool); | |
302 if (b == NULL) { | |
303 return NGX_ERROR; | |
304 } | |
305 | |
306 cl = ngx_alloc_chain_link(r->pool); | |
307 if (cl == NULL) { | |
308 return NGX_ERROR; | |
309 } | |
310 | |
311 cl->buf = b; | |
312 } | |
313 | |
314 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
315 | |
316 b->pos = ctx->copy_start; | |
317 b->last = ctx->copy_end; | |
318 b->shadow = NULL; | |
319 b->last_buf = 0; | |
320 b->recycled = 0; | |
321 | |
322 if (b->in_file) { | |
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323 b->file_last = b->file_pos + (b->last - ctx->buf->pos); |
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324 b->file_pos += b->pos - ctx->buf->pos; |
1172 | 325 } |
326 | |
327 cl->next = NULL; | |
328 *ctx->last_out = cl; | |
329 ctx->last_out = &cl->next; | |
330 } | |
331 | |
332 if (ctx->state == sub_start_state) { | |
333 ctx->copy_start = ctx->pos; | |
334 ctx->copy_end = ctx->pos; | |
335 | |
336 } else { | |
337 ctx->copy_start = NULL; | |
338 ctx->copy_end = NULL; | |
339 } | |
340 | |
341 if (rc == NGX_AGAIN) { | |
342 continue; | |
343 } | |
344 | |
345 | |
346 /* rc == NGX_OK */ | |
347 | |
348 b = ngx_calloc_buf(r->pool); | |
349 if (b == NULL) { | |
350 return NGX_ERROR; | |
351 } | |
352 | |
353 cl = ngx_alloc_chain_link(r->pool); | |
354 if (cl == NULL) { | |
355 return NGX_ERROR; | |
356 } | |
357 | |
358 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
359 | |
360 if (ctx->sub.data == NULL) { | |
361 | |
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362 if (ngx_http_complex_value(r, &slcf->value, &ctx->sub) |
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363 != NGX_OK) |
1172 | 364 { |
365 return NGX_ERROR; | |
366 } | |
367 } | |
368 | |
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369 if (ctx->sub.len) { |
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370 b->memory = 1; |
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371 b->pos = ctx->sub.data; |
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372 b->last = ctx->sub.data + ctx->sub.len; |
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373 |
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374 } else { |
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375 b->sync = 1; |
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376 } |
1172 | 377 |
378 cl->buf = b; | |
379 cl->next = NULL; | |
380 *ctx->last_out = cl; | |
381 ctx->last_out = &cl->next; | |
382 | |
383 ctx->once = slcf->once; | |
384 | |
385 continue; | |
386 } | |
387 | |
388 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
389 if (b == NULL) { | |
390 if (ctx->free) { | |
391 cl = ctx->free; | |
392 ctx->free = ctx->free->next; | |
393 b = cl->buf; | |
394 ngx_memzero(b, sizeof(ngx_buf_t)); | |
395 | |
396 } else { | |
397 b = ngx_calloc_buf(r->pool); | |
398 if (b == NULL) { | |
399 return NGX_ERROR; | |
400 } | |
401 | |
402 cl = ngx_alloc_chain_link(r->pool); | |
403 if (cl == NULL) { | |
404 return NGX_ERROR; | |
405 } | |
406 | |
407 cl->buf = b; | |
408 } | |
409 | |
410 b->sync = 1; | |
411 | |
412 cl->next = NULL; | |
413 *ctx->last_out = cl; | |
414 ctx->last_out = &cl->next; | |
415 } | |
416 | |
417 b->last_buf = ctx->buf->last_buf; | |
418 b->shadow = ctx->buf; | |
419 | |
420 b->recycled = ctx->buf->recycled; | |
421 } | |
422 | |
423 ctx->buf = NULL; | |
424 | |
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425 ctx->saved.len = ctx->looked.len; |
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426 ngx_memcpy(ctx->saved.data, ctx->looked.data, ctx->looked.len); |
1172 | 427 } |
428 | |
429 if (ctx->out == NULL && ctx->busy == NULL) { | |
430 return NGX_OK; | |
431 } | |
432 | |
433 return ngx_http_sub_output(r, ctx); | |
434 } | |
435 | |
436 | |
437 static ngx_int_t | |
438 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
439 { | |
440 ngx_int_t rc; | |
441 ngx_buf_t *b; | |
442 ngx_chain_t *cl; | |
443 | |
444 #if 1 | |
445 b = NULL; | |
446 for (cl = ctx->out; cl; cl = cl->next) { | |
447 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
448 "sub out: %p %p", cl->buf, cl->buf->pos); | |
449 if (cl->buf == b) { | |
450 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
451 "the same buf was used in sub"); | |
452 ngx_debug_point(); | |
453 return NGX_ERROR; | |
454 } | |
455 b = cl->buf; | |
456 } | |
457 #endif | |
458 | |
459 rc = ngx_http_next_body_filter(r, ctx->out); | |
460 | |
461 if (ctx->busy == NULL) { | |
462 ctx->busy = ctx->out; | |
463 | |
464 } else { | |
465 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
466 cl->next = ctx->out; | |
467 } | |
468 | |
469 ctx->out = NULL; | |
470 ctx->last_out = &ctx->out; | |
471 | |
472 while (ctx->busy) { | |
473 | |
474 cl = ctx->busy; | |
475 b = cl->buf; | |
476 | |
477 if (ngx_buf_size(b) != 0) { | |
478 break; | |
479 } | |
480 | |
481 if (b->shadow) { | |
482 b->shadow->pos = b->shadow->last; | |
483 } | |
484 | |
485 ctx->busy = cl->next; | |
486 | |
487 if (ngx_buf_in_memory(b) || b->in_file) { | |
488 /* add data bufs only to the free buf chain */ | |
489 | |
490 cl->next = ctx->free; | |
491 ctx->free = cl; | |
492 } | |
493 } | |
494 | |
495 if (ctx->in || ctx->buf) { | |
496 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
497 | |
498 } else { | |
499 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
500 } | |
501 | |
502 return rc; | |
503 } | |
504 | |
505 | |
506 static ngx_int_t | |
507 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
508 { | |
509 u_char *p, *last, *copy_end, ch, match; | |
510 size_t looked; | |
511 ngx_http_sub_state_e state; | |
512 | |
513 if (ctx->once) { | |
514 ctx->copy_start = ctx->pos; | |
515 ctx->copy_end = ctx->buf->last; | |
516 ctx->pos = ctx->buf->last; | |
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517 ctx->looked.len = 0; |
1172 | 518 |
519 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
520 | |
521 return NGX_AGAIN; | |
522 } | |
523 | |
524 state = ctx->state; | |
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525 looked = ctx->looked.len; |
1172 | 526 last = ctx->buf->last; |
527 copy_end = ctx->copy_end; | |
528 | |
529 for (p = ctx->pos; p < last; p++) { | |
530 | |
531 ch = *p; | |
532 ch = ngx_tolower(ch); | |
533 | |
534 if (state == sub_start_state) { | |
535 | |
536 /* the tight loop */ | |
537 | |
538 match = ctx->match.data[0]; | |
539 | |
540 for ( ;; ) { | |
541 if (ch == match) { | |
542 copy_end = p; | |
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543 ctx->looked.data[0] = *p; |
1172 | 544 looked = 1; |
545 state = sub_match_state; | |
546 | |
547 goto match_started; | |
548 } | |
549 | |
550 if (++p == last) { | |
551 break; | |
552 } | |
553 | |
554 ch = *p; | |
555 ch = ngx_tolower(ch); | |
556 } | |
557 | |
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558 ctx->state = state; |
1172 | 559 ctx->pos = p; |
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560 ctx->looked.len = looked; |
1172 | 561 ctx->copy_end = p; |
562 | |
563 if (ctx->copy_start == NULL) { | |
564 ctx->copy_start = ctx->buf->pos; | |
565 } | |
566 | |
567 return NGX_AGAIN; | |
568 | |
569 match_started: | |
570 | |
571 continue; | |
572 } | |
573 | |
574 /* state == sub_match_state */ | |
575 | |
576 if (ch == ctx->match.data[looked]) { | |
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577 ctx->looked.data[looked] = *p; |
1172 | 578 looked++; |
579 | |
580 if (looked == ctx->match.len) { | |
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581 if ((size_t) (p - ctx->pos) < looked) { |
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582 ctx->saved.len = 0; |
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583 } |
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584 |
1172 | 585 ctx->state = sub_start_state; |
586 ctx->pos = p + 1; | |
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587 ctx->looked.len = 0; |
1172 | 588 ctx->copy_end = copy_end; |
589 | |
590 if (ctx->copy_start == NULL && copy_end) { | |
591 ctx->copy_start = ctx->buf->pos; | |
592 } | |
593 | |
594 return NGX_OK; | |
595 } | |
596 | |
597 } else if (ch == ctx->match.data[0]) { | |
598 copy_end = p; | |
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599 ctx->looked.data[0] = *p; |
1172 | 600 looked = 1; |
601 | |
602 } else { | |
603 copy_end = p; | |
604 looked = 0; | |
605 state = sub_start_state; | |
606 } | |
607 } | |
608 | |
609 ctx->state = state; | |
610 ctx->pos = p; | |
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611 ctx->looked.len = looked; |
1172 | 612 |
613 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
614 | |
615 if (ctx->copy_start == NULL && ctx->copy_end) { | |
616 ctx->copy_start = ctx->buf->pos; | |
617 } | |
618 | |
619 return NGX_AGAIN; | |
620 } | |
621 | |
622 | |
623 static char * | |
624 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
625 { | |
626 ngx_http_sub_loc_conf_t *slcf = conf; | |
627 | |
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628 ngx_str_t *value; |
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629 ngx_http_compile_complex_value_t ccv; |
1172 | 630 |
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631 if (slcf->match.data) { |
1172 | 632 return "is duplicate"; |
633 } | |
634 | |
635 value = cf->args->elts; | |
636 | |
2135 | 637 ngx_strlow(value[1].data, value[1].data, value[1].len); |
1172 | 638 |
2135 | 639 slcf->match = value[1]; |
1172 | 640 |
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641 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
1172 | 642 |
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643 ccv.cf = cf; |
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644 ccv.value = &value[2]; |
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645 ccv.complex_value = &slcf->value; |
1172 | 646 |
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647 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
1172 | 648 return NGX_CONF_ERROR; |
649 } | |
650 | |
651 return NGX_CONF_OK; | |
652 } | |
653 | |
654 | |
655 static void * | |
656 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
657 { | |
658 ngx_http_sub_loc_conf_t *slcf; | |
659 | |
660 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
661 if (slcf == NULL) { | |
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662 return NULL; |
1172 | 663 } |
664 | |
665 /* | |
666 * set by ngx_pcalloc(): | |
667 * | |
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668 * conf->match = { 0, NULL }; |
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669 * conf->sub = { 0, NULL }; |
1172 | 670 * conf->sub_lengths = NULL; |
671 * conf->sub_values = NULL; | |
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672 * conf->types = { NULL }; |
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673 * conf->types_keys = NULL; |
1172 | 674 */ |
675 | |
676 slcf->once = NGX_CONF_UNSET; | |
677 | |
678 return slcf; | |
679 } | |
680 | |
681 | |
682 static char * | |
683 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
684 { | |
685 ngx_http_sub_loc_conf_t *prev = parent; | |
686 ngx_http_sub_loc_conf_t *conf = child; | |
687 | |
688 ngx_conf_merge_value(conf->once, prev->once, 1); | |
689 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
690 | |
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691 if (conf->value.value.data == NULL) { |
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692 conf->value = prev->value; |
1172 | 693 } |
694 | |
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695 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types, |
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696 &prev->types_keys, &prev->types, |
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697 ngx_http_html_default_types) |
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698 != NGX_OK) |
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699 { |
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700 return NGX_CONF_ERROR; |
1172 | 701 } |
702 | |
703 return NGX_CONF_OK; | |
704 } | |
705 | |
706 | |
707 static ngx_int_t | |
708 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
709 { | |
710 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
711 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
712 | |
713 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
714 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
715 | |
716 return NGX_OK; | |
717 } |