Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_sub_filter_module.c @ 3112:5ddc9458e4bb
increase request counter before an upstream cleanup because the cleanup
decreases the counter via ngx_http_finalize_request(r, NGX_DONE),
the bug was introduced in r3050
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Tue, 08 Sep 2009 11:37:50 +0000 |
parents | c7d57b539248 |
children | 6b8e5c882e47 f706037d7f10 |
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 { | |
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13 ngx_str_t match; |
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14 ngx_http_complex_value_t value; |
1172 | 15 |
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16 ngx_hash_t types; |
1172 | 17 |
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18 ngx_flag_t once; |
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19 |
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20 ngx_array_t *types_keys; |
1172 | 21 } ngx_http_sub_loc_conf_t; |
22 | |
23 | |
24 typedef enum { | |
25 sub_start_state = 0, | |
26 sub_match_state, | |
27 } ngx_http_sub_state_e; | |
28 | |
29 | |
30 typedef struct { | |
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31 ngx_str_t match; |
1172 | 32 |
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33 ngx_uint_t once; /* unsigned once:1 */ |
1172 | 34 |
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35 ngx_buf_t *buf; |
1172 | 36 |
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37 u_char *pos; |
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38 u_char *copy_start; |
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39 u_char *copy_end; |
1172 | 40 |
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41 ngx_chain_t *in; |
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42 ngx_chain_t *out; |
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43 ngx_chain_t **last_out; |
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44 ngx_chain_t *busy; |
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45 ngx_chain_t *free; |
1172 | 46 |
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47 ngx_str_t sub; |
1172 | 48 |
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49 ngx_uint_t state; |
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50 size_t saved; |
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51 size_t looked; |
1172 | 52 } ngx_http_sub_ctx_t; |
53 | |
54 | |
55 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r, | |
56 ngx_http_sub_ctx_t *ctx); | |
57 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r, | |
58 ngx_http_sub_ctx_t *ctx); | |
59 | |
60 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, | |
61 void *conf); | |
62 static void *ngx_http_sub_create_conf(ngx_conf_t *cf); | |
63 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf, | |
64 void *parent, void *child); | |
65 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf); | |
66 | |
67 | |
68 static ngx_command_t ngx_http_sub_filter_commands[] = { | |
69 | |
70 { ngx_string("sub_filter"), | |
71 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
72 ngx_http_sub_filter, | |
73 NGX_HTTP_LOC_CONF_OFFSET, | |
74 0, | |
75 NULL }, | |
76 | |
77 { ngx_string("sub_filter_types"), | |
78 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE, | |
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79 ngx_http_types_slot, |
1172 | 80 NGX_HTTP_LOC_CONF_OFFSET, |
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81 offsetof(ngx_http_sub_loc_conf_t, types_keys), |
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82 &ngx_http_html_default_types[0] }, |
1172 | 83 |
84 { ngx_string("sub_filter_once"), | |
85 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
86 ngx_conf_set_flag_slot, | |
87 NGX_HTTP_LOC_CONF_OFFSET, | |
88 offsetof(ngx_http_sub_loc_conf_t, once), | |
89 NULL }, | |
90 | |
91 ngx_null_command | |
92 }; | |
93 | |
94 | |
95 static ngx_http_module_t ngx_http_sub_filter_module_ctx = { | |
96 NULL, /* preconfiguration */ | |
97 ngx_http_sub_filter_init, /* postconfiguration */ | |
98 | |
99 NULL, /* create main configuration */ | |
100 NULL, /* init main configuration */ | |
101 | |
102 NULL, /* create server configuration */ | |
103 NULL, /* merge server configuration */ | |
104 | |
105 ngx_http_sub_create_conf, /* create location configuration */ | |
106 ngx_http_sub_merge_conf /* merge location configuration */ | |
107 }; | |
108 | |
109 | |
110 ngx_module_t ngx_http_sub_filter_module = { | |
111 NGX_MODULE_V1, | |
112 &ngx_http_sub_filter_module_ctx, /* module context */ | |
113 ngx_http_sub_filter_commands, /* module directives */ | |
114 NGX_HTTP_MODULE, /* module type */ | |
115 NULL, /* init master */ | |
116 NULL, /* init module */ | |
117 NULL, /* init process */ | |
118 NULL, /* init thread */ | |
119 NULL, /* exit thread */ | |
120 NULL, /* exit process */ | |
121 NULL, /* exit master */ | |
122 NGX_MODULE_V1_PADDING | |
123 }; | |
124 | |
125 | |
126 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
127 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
128 | |
129 | |
130 static ngx_int_t | |
131 ngx_http_sub_header_filter(ngx_http_request_t *r) | |
132 { | |
133 ngx_http_sub_ctx_t *ctx; | |
134 ngx_http_sub_loc_conf_t *slcf; | |
135 | |
136 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
137 | |
138 if (slcf->match.len == 0 | |
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139 || r->headers_out.content_length_n == 0 |
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140 || ngx_http_test_content_type(r, &slcf->types) == NULL) |
1172 | 141 { |
142 return ngx_http_next_header_filter(r); | |
143 } | |
144 | |
145 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t)); | |
146 if (ctx == NULL) { | |
147 return NGX_ERROR; | |
148 } | |
149 | |
150 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module); | |
151 | |
152 ctx->match = slcf->match; | |
153 ctx->last_out = &ctx->out; | |
154 | |
155 r->filter_need_in_memory = 1; | |
156 | |
157 if (r == r->main) { | |
158 ngx_http_clear_content_length(r); | |
159 ngx_http_clear_last_modified(r); | |
160 } | |
161 | |
162 return ngx_http_next_header_filter(r); | |
163 } | |
164 | |
165 | |
166 static ngx_int_t | |
167 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
168 { | |
169 ngx_int_t rc; | |
170 ngx_buf_t *b; | |
171 ngx_chain_t *cl; | |
172 ngx_http_sub_ctx_t *ctx; | |
173 ngx_http_sub_loc_conf_t *slcf; | |
174 | |
175 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module); | |
176 | |
177 if (ctx == NULL) { | |
178 return ngx_http_next_body_filter(r, in); | |
179 } | |
180 | |
181 if ((in == NULL | |
182 && ctx->buf == NULL | |
183 && ctx->in == NULL | |
184 && ctx->busy == NULL)) | |
185 { | |
186 return ngx_http_next_body_filter(r, in); | |
187 } | |
188 | |
189 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) { | |
190 | |
191 if (ctx->busy) { | |
192 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) { | |
193 return NGX_ERROR; | |
194 } | |
195 } | |
196 | |
197 return ngx_http_next_body_filter(r, in); | |
198 } | |
199 | |
200 /* add the incoming chain to the chain ctx->in */ | |
201 | |
202 if (in) { | |
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203 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { |
1172 | 204 return NGX_ERROR; |
205 } | |
206 } | |
207 | |
208 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
209 "http sub filter \"%V\"", &r->uri); | |
210 | |
211 while (ctx->in || ctx->buf) { | |
212 | |
213 if (ctx->buf == NULL ){ | |
214 ctx->buf = ctx->in->buf; | |
215 ctx->in = ctx->in->next; | |
216 ctx->pos = ctx->buf->pos; | |
217 } | |
218 | |
219 if (ctx->state == sub_start_state) { | |
220 ctx->copy_start = ctx->pos; | |
221 ctx->copy_end = ctx->pos; | |
222 } | |
223 | |
224 b = NULL; | |
225 | |
226 while (ctx->pos < ctx->buf->last) { | |
227 | |
228 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
229 "saved: %d state: %d", ctx->saved, ctx->state); | |
230 | |
231 rc = ngx_http_sub_parse(r, ctx); | |
232 | |
233 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
234 "parse: %d, looked: %d %p-%p", | |
235 rc, ctx->looked, ctx->copy_start, ctx->copy_end); | |
236 | |
237 if (rc == NGX_ERROR) { | |
238 return rc; | |
239 } | |
240 | |
241 if (ctx->copy_start != ctx->copy_end) { | |
242 | |
243 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
244 "saved: %d", ctx->saved); | |
245 | |
246 if (ctx->saved) { | |
247 | |
248 if (ctx->free) { | |
249 cl = ctx->free; | |
250 ctx->free = ctx->free->next; | |
251 b = cl->buf; | |
252 ngx_memzero(b, sizeof(ngx_buf_t)); | |
253 | |
254 } else { | |
255 b = ngx_calloc_buf(r->pool); | |
256 if (b == NULL) { | |
257 return NGX_ERROR; | |
258 } | |
259 | |
260 cl = ngx_alloc_chain_link(r->pool); | |
261 if (cl == NULL) { | |
262 return NGX_ERROR; | |
263 } | |
264 | |
265 cl->buf = b; | |
266 } | |
267 | |
268 b->memory = 1; | |
269 b->pos = ctx->match.data; | |
270 b->last = ctx->match.data + ctx->saved; | |
271 | |
272 *ctx->last_out = cl; | |
273 ctx->last_out = &cl->next; | |
274 | |
275 ctx->saved = 0; | |
276 } | |
277 | |
278 if (ctx->free) { | |
279 cl = ctx->free; | |
280 ctx->free = ctx->free->next; | |
281 b = cl->buf; | |
282 | |
283 } else { | |
284 b = ngx_alloc_buf(r->pool); | |
285 if (b == NULL) { | |
286 return NGX_ERROR; | |
287 } | |
288 | |
289 cl = ngx_alloc_chain_link(r->pool); | |
290 if (cl == NULL) { | |
291 return NGX_ERROR; | |
292 } | |
293 | |
294 cl->buf = b; | |
295 } | |
296 | |
297 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t)); | |
298 | |
299 b->pos = ctx->copy_start; | |
300 b->last = ctx->copy_end; | |
301 b->shadow = NULL; | |
302 b->last_buf = 0; | |
303 b->recycled = 0; | |
304 | |
305 if (b->in_file) { | |
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306 b->file_last = b->file_pos + (b->last - ctx->buf->pos); |
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307 b->file_pos += b->pos - ctx->buf->pos; |
1172 | 308 } |
309 | |
310 cl->next = NULL; | |
311 *ctx->last_out = cl; | |
312 ctx->last_out = &cl->next; | |
313 } | |
314 | |
315 if (ctx->state == sub_start_state) { | |
316 ctx->copy_start = ctx->pos; | |
317 ctx->copy_end = ctx->pos; | |
318 | |
319 } else { | |
320 ctx->copy_start = NULL; | |
321 ctx->copy_end = NULL; | |
322 } | |
323 | |
324 if (rc == NGX_AGAIN) { | |
325 continue; | |
326 } | |
327 | |
328 | |
329 /* rc == NGX_OK */ | |
330 | |
331 b = ngx_calloc_buf(r->pool); | |
332 if (b == NULL) { | |
333 return NGX_ERROR; | |
334 } | |
335 | |
336 cl = ngx_alloc_chain_link(r->pool); | |
337 if (cl == NULL) { | |
338 return NGX_ERROR; | |
339 } | |
340 | |
341 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module); | |
342 | |
343 if (ctx->sub.data == NULL) { | |
344 | |
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345 if (ngx_http_complex_value(r, &slcf->value, &ctx->sub) |
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346 != NGX_OK) |
1172 | 347 { |
348 return NGX_ERROR; | |
349 } | |
350 } | |
351 | |
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352 if (ctx->sub.len) { |
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353 b->memory = 1; |
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354 b->pos = ctx->sub.data; |
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355 b->last = ctx->sub.data + ctx->sub.len; |
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356 |
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357 } else { |
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358 b->sync = 1; |
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359 } |
1172 | 360 |
361 cl->buf = b; | |
362 cl->next = NULL; | |
363 *ctx->last_out = cl; | |
364 ctx->last_out = &cl->next; | |
365 | |
366 ctx->once = slcf->once; | |
367 | |
368 continue; | |
369 } | |
370 | |
371 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) { | |
372 if (b == NULL) { | |
373 if (ctx->free) { | |
374 cl = ctx->free; | |
375 ctx->free = ctx->free->next; | |
376 b = cl->buf; | |
377 ngx_memzero(b, sizeof(ngx_buf_t)); | |
378 | |
379 } else { | |
380 b = ngx_calloc_buf(r->pool); | |
381 if (b == NULL) { | |
382 return NGX_ERROR; | |
383 } | |
384 | |
385 cl = ngx_alloc_chain_link(r->pool); | |
386 if (cl == NULL) { | |
387 return NGX_ERROR; | |
388 } | |
389 | |
390 cl->buf = b; | |
391 } | |
392 | |
393 b->sync = 1; | |
394 | |
395 cl->next = NULL; | |
396 *ctx->last_out = cl; | |
397 ctx->last_out = &cl->next; | |
398 } | |
399 | |
400 b->last_buf = ctx->buf->last_buf; | |
401 b->shadow = ctx->buf; | |
402 | |
403 b->recycled = ctx->buf->recycled; | |
404 } | |
405 | |
406 ctx->buf = NULL; | |
407 | |
408 ctx->saved = ctx->looked; | |
409 } | |
410 | |
411 if (ctx->out == NULL && ctx->busy == NULL) { | |
412 return NGX_OK; | |
413 } | |
414 | |
415 return ngx_http_sub_output(r, ctx); | |
416 } | |
417 | |
418 | |
419 static ngx_int_t | |
420 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
421 { | |
422 ngx_int_t rc; | |
423 ngx_buf_t *b; | |
424 ngx_chain_t *cl; | |
425 | |
426 #if 1 | |
427 b = NULL; | |
428 for (cl = ctx->out; cl; cl = cl->next) { | |
429 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
430 "sub out: %p %p", cl->buf, cl->buf->pos); | |
431 if (cl->buf == b) { | |
432 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
433 "the same buf was used in sub"); | |
434 ngx_debug_point(); | |
435 return NGX_ERROR; | |
436 } | |
437 b = cl->buf; | |
438 } | |
439 #endif | |
440 | |
441 rc = ngx_http_next_body_filter(r, ctx->out); | |
442 | |
443 if (ctx->busy == NULL) { | |
444 ctx->busy = ctx->out; | |
445 | |
446 } else { | |
447 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ } | |
448 cl->next = ctx->out; | |
449 } | |
450 | |
451 ctx->out = NULL; | |
452 ctx->last_out = &ctx->out; | |
453 | |
454 while (ctx->busy) { | |
455 | |
456 cl = ctx->busy; | |
457 b = cl->buf; | |
458 | |
459 if (ngx_buf_size(b) != 0) { | |
460 break; | |
461 } | |
462 | |
463 if (b->shadow) { | |
464 b->shadow->pos = b->shadow->last; | |
465 } | |
466 | |
467 ctx->busy = cl->next; | |
468 | |
469 if (ngx_buf_in_memory(b) || b->in_file) { | |
470 /* add data bufs only to the free buf chain */ | |
471 | |
472 cl->next = ctx->free; | |
473 ctx->free = cl; | |
474 } | |
475 } | |
476 | |
477 if (ctx->in || ctx->buf) { | |
478 r->buffered |= NGX_HTTP_SUB_BUFFERED; | |
479 | |
480 } else { | |
481 r->buffered &= ~NGX_HTTP_SUB_BUFFERED; | |
482 } | |
483 | |
484 return rc; | |
485 } | |
486 | |
487 | |
488 static ngx_int_t | |
489 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx) | |
490 { | |
491 u_char *p, *last, *copy_end, ch, match; | |
492 size_t looked; | |
493 ngx_http_sub_state_e state; | |
494 | |
495 if (ctx->once) { | |
496 ctx->copy_start = ctx->pos; | |
497 ctx->copy_end = ctx->buf->last; | |
498 ctx->pos = ctx->buf->last; | |
499 ctx->looked = 0; | |
500 | |
501 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once"); | |
502 | |
503 return NGX_AGAIN; | |
504 } | |
505 | |
506 state = ctx->state; | |
507 looked = ctx->looked; | |
508 last = ctx->buf->last; | |
509 copy_end = ctx->copy_end; | |
510 | |
511 for (p = ctx->pos; p < last; p++) { | |
512 | |
513 ch = *p; | |
514 ch = ngx_tolower(ch); | |
515 | |
516 if (state == sub_start_state) { | |
517 | |
518 /* the tight loop */ | |
519 | |
520 match = ctx->match.data[0]; | |
521 | |
522 for ( ;; ) { | |
523 if (ch == match) { | |
524 copy_end = p; | |
525 looked = 1; | |
526 state = sub_match_state; | |
527 | |
528 goto match_started; | |
529 } | |
530 | |
531 if (++p == last) { | |
532 break; | |
533 } | |
534 | |
535 ch = *p; | |
536 ch = ngx_tolower(ch); | |
537 } | |
538 | |
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539 ctx->state = state; |
1172 | 540 ctx->pos = p; |
541 ctx->looked = looked; | |
542 ctx->copy_end = p; | |
543 | |
544 if (ctx->copy_start == NULL) { | |
545 ctx->copy_start = ctx->buf->pos; | |
546 } | |
547 | |
548 return NGX_AGAIN; | |
549 | |
550 match_started: | |
551 | |
552 continue; | |
553 } | |
554 | |
555 /* state == sub_match_state */ | |
556 | |
557 if (ch == ctx->match.data[looked]) { | |
558 looked++; | |
559 | |
560 if (looked == ctx->match.len) { | |
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561 if ((size_t) (p - ctx->pos) < looked) { |
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562 ctx->saved = 0; |
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563 } |
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564 |
1172 | 565 ctx->state = sub_start_state; |
566 ctx->pos = p + 1; | |
1978 | 567 ctx->looked = 0; |
1172 | 568 ctx->copy_end = copy_end; |
569 | |
570 if (ctx->copy_start == NULL && copy_end) { | |
571 ctx->copy_start = ctx->buf->pos; | |
572 } | |
573 | |
574 return NGX_OK; | |
575 } | |
576 | |
577 } else if (ch == ctx->match.data[0]) { | |
578 copy_end = p; | |
579 looked = 1; | |
580 | |
581 } else { | |
582 copy_end = p; | |
583 looked = 0; | |
584 state = sub_start_state; | |
585 } | |
586 } | |
587 | |
588 ctx->state = state; | |
589 ctx->pos = p; | |
590 ctx->looked = looked; | |
591 | |
592 ctx->copy_end = (state == sub_start_state) ? p : copy_end; | |
593 | |
594 if (ctx->copy_start == NULL && ctx->copy_end) { | |
595 ctx->copy_start = ctx->buf->pos; | |
596 } | |
597 | |
598 return NGX_AGAIN; | |
599 } | |
600 | |
601 | |
602 static char * | |
603 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) | |
604 { | |
605 ngx_http_sub_loc_conf_t *slcf = conf; | |
606 | |
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607 ngx_str_t *value; |
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608 ngx_http_compile_complex_value_t ccv; |
1172 | 609 |
610 if (slcf->match.len) { | |
611 return "is duplicate"; | |
612 } | |
613 | |
614 value = cf->args->elts; | |
615 | |
2135 | 616 ngx_strlow(value[1].data, value[1].data, value[1].len); |
1172 | 617 |
2135 | 618 slcf->match = value[1]; |
1172 | 619 |
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620 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t)); |
1172 | 621 |
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622 ccv.cf = cf; |
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623 ccv.value = &value[2]; |
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624 ccv.complex_value = &slcf->value; |
1172 | 625 |
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626 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) { |
1172 | 627 return NGX_CONF_ERROR; |
628 } | |
629 | |
630 return NGX_CONF_OK; | |
631 } | |
632 | |
633 | |
634 static void * | |
635 ngx_http_sub_create_conf(ngx_conf_t *cf) | |
636 { | |
637 ngx_http_sub_loc_conf_t *slcf; | |
638 | |
639 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t)); | |
640 if (slcf == NULL) { | |
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641 return NULL; |
1172 | 642 } |
643 | |
644 /* | |
645 * set by ngx_pcalloc(): | |
646 * | |
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647 * conf->match = { 0, NULL }; |
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648 * conf->sub = { 0, NULL }; |
1172 | 649 * conf->sub_lengths = NULL; |
650 * conf->sub_values = NULL; | |
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651 * conf->types = { NULL }; |
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652 * conf->types_keys = NULL; |
1172 | 653 */ |
654 | |
655 slcf->once = NGX_CONF_UNSET; | |
656 | |
657 return slcf; | |
658 } | |
659 | |
660 | |
661 static char * | |
662 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
663 { | |
664 ngx_http_sub_loc_conf_t *prev = parent; | |
665 ngx_http_sub_loc_conf_t *conf = child; | |
666 | |
667 ngx_conf_merge_value(conf->once, prev->once, 1); | |
668 ngx_conf_merge_str_value(conf->match, prev->match, ""); | |
669 | |
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670 if (conf->value.value.len == 0) { |
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671 conf->value = prev->value; |
1172 | 672 } |
673 | |
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674 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types, |
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675 prev->types_keys, &prev->types, |
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676 ngx_http_html_default_types) |
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677 != NGX_OK) |
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678 { |
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679 return NGX_CONF_ERROR; |
1172 | 680 } |
681 | |
682 return NGX_CONF_OK; | |
683 } | |
684 | |
685 | |
686 static ngx_int_t | |
687 ngx_http_sub_filter_init(ngx_conf_t *cf) | |
688 { | |
689 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
690 ngx_http_top_header_filter = ngx_http_sub_header_filter; | |
691 | |
692 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
693 ngx_http_top_body_filter = ngx_http_sub_body_filter; | |
694 | |
695 return NGX_OK; | |
696 } |