Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_gunzip_filter_module.c @ 4930:6f085bfcdb4d
Request body: chunked transfer encoding support.
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Wed, 21 Nov 2012 01:08:11 +0000 |
parents | 3abac956f6c8 |
children | 41bf14321133 |
rev | line source |
---|---|
4837 | 1 |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 * Copyright (C) Maxim Dounin | |
5 * Copyright (C) Nginx, Inc. | |
6 */ | |
7 | |
8 | |
9 #include <ngx_config.h> | |
10 #include <ngx_core.h> | |
11 #include <ngx_http.h> | |
12 | |
13 #include <zlib.h> | |
14 | |
15 | |
16 typedef struct { | |
17 ngx_flag_t enable; | |
18 ngx_bufs_t bufs; | |
19 } ngx_http_gunzip_conf_t; | |
20 | |
21 | |
22 typedef struct { | |
23 ngx_chain_t *in; | |
24 ngx_chain_t *free; | |
25 ngx_chain_t *busy; | |
26 ngx_chain_t *out; | |
27 ngx_chain_t **last_out; | |
28 | |
29 ngx_buf_t *in_buf; | |
30 ngx_buf_t *out_buf; | |
31 ngx_int_t bufs; | |
32 | |
33 unsigned started:1; | |
34 unsigned flush:4; | |
35 unsigned redo:1; | |
36 unsigned done:1; | |
37 unsigned nomem:1; | |
38 | |
39 z_stream zstream; | |
40 ngx_http_request_t *request; | |
41 } ngx_http_gunzip_ctx_t; | |
42 | |
43 | |
44 static ngx_int_t ngx_http_gunzip_filter_inflate_start(ngx_http_request_t *r, | |
45 ngx_http_gunzip_ctx_t *ctx); | |
46 static ngx_int_t ngx_http_gunzip_filter_add_data(ngx_http_request_t *r, | |
47 ngx_http_gunzip_ctx_t *ctx); | |
48 static ngx_int_t ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r, | |
49 ngx_http_gunzip_ctx_t *ctx); | |
50 static ngx_int_t ngx_http_gunzip_filter_inflate(ngx_http_request_t *r, | |
51 ngx_http_gunzip_ctx_t *ctx); | |
52 static ngx_int_t ngx_http_gunzip_filter_inflate_end(ngx_http_request_t *r, | |
53 ngx_http_gunzip_ctx_t *ctx); | |
54 | |
55 static void *ngx_http_gunzip_filter_alloc(void *opaque, u_int items, | |
56 u_int size); | |
57 static void ngx_http_gunzip_filter_free(void *opaque, void *address); | |
58 | |
59 static ngx_int_t ngx_http_gunzip_filter_init(ngx_conf_t *cf); | |
60 static void *ngx_http_gunzip_create_conf(ngx_conf_t *cf); | |
61 static char *ngx_http_gunzip_merge_conf(ngx_conf_t *cf, | |
62 void *parent, void *child); | |
63 | |
64 | |
65 static ngx_command_t ngx_http_gunzip_filter_commands[] = { | |
66 | |
67 { ngx_string("gunzip"), | |
68 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG, | |
69 ngx_conf_set_flag_slot, | |
70 NGX_HTTP_LOC_CONF_OFFSET, | |
71 offsetof(ngx_http_gunzip_conf_t, enable), | |
72 NULL }, | |
73 | |
74 { ngx_string("gunzip_buffers"), | |
75 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2, | |
76 ngx_conf_set_bufs_slot, | |
77 NGX_HTTP_LOC_CONF_OFFSET, | |
78 offsetof(ngx_http_gunzip_conf_t, bufs), | |
79 NULL }, | |
80 | |
81 ngx_null_command | |
82 }; | |
83 | |
84 | |
85 static ngx_http_module_t ngx_http_gunzip_filter_module_ctx = { | |
86 NULL, /* preconfiguration */ | |
87 ngx_http_gunzip_filter_init, /* postconfiguration */ | |
88 | |
89 NULL, /* create main configuration */ | |
90 NULL, /* init main configuration */ | |
91 | |
92 NULL, /* create server configuration */ | |
93 NULL, /* merge server configuration */ | |
94 | |
95 ngx_http_gunzip_create_conf, /* create location configuration */ | |
96 ngx_http_gunzip_merge_conf /* merge location configuration */ | |
97 }; | |
98 | |
99 | |
100 ngx_module_t ngx_http_gunzip_filter_module = { | |
101 NGX_MODULE_V1, | |
102 &ngx_http_gunzip_filter_module_ctx, /* module context */ | |
103 ngx_http_gunzip_filter_commands, /* module directives */ | |
104 NGX_HTTP_MODULE, /* module type */ | |
105 NULL, /* init master */ | |
106 NULL, /* init module */ | |
107 NULL, /* init process */ | |
108 NULL, /* init thread */ | |
109 NULL, /* exit thread */ | |
110 NULL, /* exit process */ | |
111 NULL, /* exit master */ | |
112 NGX_MODULE_V1_PADDING | |
113 }; | |
114 | |
115 | |
116 static ngx_http_output_header_filter_pt ngx_http_next_header_filter; | |
117 static ngx_http_output_body_filter_pt ngx_http_next_body_filter; | |
118 | |
119 | |
120 static ngx_int_t | |
121 ngx_http_gunzip_header_filter(ngx_http_request_t *r) | |
122 { | |
123 ngx_http_gunzip_ctx_t *ctx; | |
124 ngx_http_gunzip_conf_t *conf; | |
125 | |
126 conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module); | |
127 | |
128 /* TODO support multiple content-codings */ | |
129 /* TODO always gunzip - due to configuration or module request */ | |
130 /* TODO ignore content encoding? */ | |
131 | |
132 if (!conf->enable | |
133 || r->headers_out.content_encoding == NULL | |
134 || r->headers_out.content_encoding->value.len != 4 | |
135 || ngx_strncasecmp(r->headers_out.content_encoding->value.data, | |
136 (u_char *) "gzip", 4) != 0) | |
137 { | |
138 return ngx_http_next_header_filter(r); | |
139 } | |
140 | |
141 r->gzip_vary = 1; | |
142 | |
143 if (!r->gzip_tested) { | |
144 if (ngx_http_gzip_ok(r) == NGX_OK) { | |
145 return ngx_http_next_header_filter(r); | |
146 } | |
147 | |
4888
3abac956f6c8
Gunzip: fixed r->gzip_ok check.
Maxim Dounin <mdounin@mdounin.ru>
parents:
4838
diff
changeset
|
148 } else if (r->gzip_ok) { |
4837 | 149 return ngx_http_next_header_filter(r); |
150 } | |
151 | |
152 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_gunzip_ctx_t)); | |
153 if (ctx == NULL) { | |
154 return NGX_ERROR; | |
155 } | |
156 | |
157 ngx_http_set_ctx(r, ctx, ngx_http_gunzip_filter_module); | |
158 | |
159 ctx->request = r; | |
160 | |
161 r->filter_need_in_memory = 1; | |
162 | |
163 r->headers_out.content_encoding->hash = 0; | |
164 r->headers_out.content_encoding = NULL; | |
165 | |
166 ngx_http_clear_content_length(r); | |
167 ngx_http_clear_accept_ranges(r); | |
168 | |
169 return ngx_http_next_header_filter(r); | |
170 } | |
171 | |
172 | |
173 static ngx_int_t | |
174 ngx_http_gunzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
175 { | |
176 int rc; | |
177 ngx_chain_t *cl; | |
178 ngx_http_gunzip_ctx_t *ctx; | |
179 | |
180 ctx = ngx_http_get_module_ctx(r, ngx_http_gunzip_filter_module); | |
181 | |
182 if (ctx == NULL || ctx->done) { | |
183 return ngx_http_next_body_filter(r, in); | |
184 } | |
185 | |
186 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
187 "http gunzip filter"); | |
188 | |
189 if (!ctx->started) { | |
190 if (ngx_http_gunzip_filter_inflate_start(r, ctx) != NGX_OK) { | |
191 goto failed; | |
192 } | |
193 } | |
194 | |
195 if (in) { | |
196 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { | |
197 goto failed; | |
198 } | |
199 } | |
200 | |
201 if (ctx->nomem) { | |
202 | |
203 /* flush busy buffers */ | |
204 | |
205 if (ngx_http_next_body_filter(r, NULL) == NGX_ERROR) { | |
206 goto failed; | |
207 } | |
208 | |
209 cl = NULL; | |
210 | |
211 ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &cl, | |
212 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
213 ctx->nomem = 0; | |
214 } | |
215 | |
216 for ( ;; ) { | |
217 | |
218 /* cycle while we can write to a client */ | |
219 | |
220 for ( ;; ) { | |
221 | |
222 /* cycle while there is data to feed zlib and ... */ | |
223 | |
224 rc = ngx_http_gunzip_filter_add_data(r, ctx); | |
225 | |
226 if (rc == NGX_DECLINED) { | |
227 break; | |
228 } | |
229 | |
230 if (rc == NGX_AGAIN) { | |
231 continue; | |
232 } | |
233 | |
234 | |
235 /* ... there are buffers to write zlib output */ | |
236 | |
237 rc = ngx_http_gunzip_filter_get_buf(r, ctx); | |
238 | |
239 if (rc == NGX_DECLINED) { | |
240 break; | |
241 } | |
242 | |
243 if (rc == NGX_ERROR) { | |
244 goto failed; | |
245 } | |
246 | |
247 rc = ngx_http_gunzip_filter_inflate(r, ctx); | |
248 | |
249 if (rc == NGX_OK) { | |
250 break; | |
251 } | |
252 | |
253 if (rc == NGX_ERROR) { | |
254 goto failed; | |
255 } | |
256 | |
257 /* rc == NGX_AGAIN */ | |
258 } | |
259 | |
260 if (ctx->out == NULL) { | |
261 return ctx->busy ? NGX_AGAIN : NGX_OK; | |
262 } | |
263 | |
264 rc = ngx_http_next_body_filter(r, ctx->out); | |
265 | |
266 if (rc == NGX_ERROR) { | |
267 goto failed; | |
268 } | |
269 | |
270 ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &ctx->out, | |
271 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
272 ctx->last_out = &ctx->out; | |
273 | |
274 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
275 "gunzip out: %p", ctx->out); | |
276 | |
277 ctx->nomem = 0; | |
278 | |
279 if (ctx->done) { | |
280 return rc; | |
281 } | |
282 } | |
283 | |
284 /* unreachable */ | |
285 | |
286 failed: | |
287 | |
288 ctx->done = 1; | |
289 | |
290 return NGX_ERROR; | |
291 } | |
292 | |
293 | |
294 static ngx_int_t | |
295 ngx_http_gunzip_filter_inflate_start(ngx_http_request_t *r, | |
296 ngx_http_gunzip_ctx_t *ctx) | |
297 { | |
298 int rc; | |
299 | |
300 ctx->zstream.next_in = Z_NULL; | |
301 ctx->zstream.avail_in = 0; | |
302 | |
303 ctx->zstream.zalloc = ngx_http_gunzip_filter_alloc; | |
304 ctx->zstream.zfree = ngx_http_gunzip_filter_free; | |
305 ctx->zstream.opaque = ctx; | |
306 | |
307 /* windowBits +16 to decode gzip, zlib 1.2.0.4+ */ | |
308 rc = inflateInit2(&ctx->zstream, MAX_WBITS + 16); | |
309 | |
310 if (rc != Z_OK) { | |
311 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
312 "inflateInit2() failed: %d", rc); | |
313 return NGX_ERROR; | |
314 } | |
315 | |
316 ctx->started = 1; | |
317 | |
318 ctx->last_out = &ctx->out; | |
319 ctx->flush = Z_NO_FLUSH; | |
320 | |
321 return NGX_OK; | |
322 } | |
323 | |
324 | |
325 static ngx_int_t | |
326 ngx_http_gunzip_filter_add_data(ngx_http_request_t *r, | |
327 ngx_http_gunzip_ctx_t *ctx) | |
328 { | |
329 if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) { | |
330 return NGX_OK; | |
331 } | |
332 | |
333 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
334 "gunzip in: %p", ctx->in); | |
335 | |
336 if (ctx->in == NULL) { | |
337 return NGX_DECLINED; | |
338 } | |
339 | |
340 ctx->in_buf = ctx->in->buf; | |
341 ctx->in = ctx->in->next; | |
342 | |
343 ctx->zstream.next_in = ctx->in_buf->pos; | |
344 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos; | |
345 | |
346 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
347 "gunzip in_buf:%p ni:%p ai:%ud", | |
348 ctx->in_buf, | |
349 ctx->zstream.next_in, ctx->zstream.avail_in); | |
350 | |
351 if (ctx->in_buf->last_buf || ctx->in_buf->last_in_chain) { | |
352 ctx->flush = Z_FINISH; | |
353 | |
354 } else if (ctx->in_buf->flush) { | |
355 ctx->flush = Z_SYNC_FLUSH; | |
356 | |
357 } else if (ctx->zstream.avail_in == 0) { | |
358 /* ctx->flush == Z_NO_FLUSH */ | |
359 return NGX_AGAIN; | |
360 } | |
361 | |
362 return NGX_OK; | |
363 } | |
364 | |
365 | |
366 static ngx_int_t | |
367 ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r, | |
368 ngx_http_gunzip_ctx_t *ctx) | |
369 { | |
370 ngx_http_gunzip_conf_t *conf; | |
371 | |
372 if (ctx->zstream.avail_out) { | |
373 return NGX_OK; | |
374 } | |
375 | |
376 conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module); | |
377 | |
378 if (ctx->free) { | |
379 ctx->out_buf = ctx->free->buf; | |
380 ctx->free = ctx->free->next; | |
381 | |
382 ctx->out_buf->flush = 0; | |
383 | |
384 } else if (ctx->bufs < conf->bufs.num) { | |
385 | |
386 ctx->out_buf = ngx_create_temp_buf(r->pool, conf->bufs.size); | |
387 if (ctx->out_buf == NULL) { | |
388 return NGX_ERROR; | |
389 } | |
390 | |
391 ctx->out_buf->tag = (ngx_buf_tag_t) &ngx_http_gunzip_filter_module; | |
392 ctx->out_buf->recycled = 1; | |
393 ctx->bufs++; | |
394 | |
395 } else { | |
396 ctx->nomem = 1; | |
397 return NGX_DECLINED; | |
398 } | |
399 | |
400 ctx->zstream.next_out = ctx->out_buf->pos; | |
401 ctx->zstream.avail_out = conf->bufs.size; | |
402 | |
403 return NGX_OK; | |
404 } | |
405 | |
406 | |
407 static ngx_int_t | |
408 ngx_http_gunzip_filter_inflate(ngx_http_request_t *r, | |
409 ngx_http_gunzip_ctx_t *ctx) | |
410 { | |
411 int rc; | |
412 ngx_buf_t *b; | |
413 ngx_chain_t *cl; | |
414 | |
415 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
416 "inflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d", | |
417 ctx->zstream.next_in, ctx->zstream.next_out, | |
418 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
419 ctx->flush, ctx->redo); | |
420 | |
421 rc = inflate(&ctx->zstream, ctx->flush); | |
422 | |
423 if (rc != Z_OK && rc != Z_STREAM_END && rc != Z_BUF_ERROR) { | |
424 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
425 "inflate() failed: %d, %d", ctx->flush, rc); | |
426 return NGX_ERROR; | |
427 } | |
428 | |
429 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
430 "inflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d", | |
431 ctx->zstream.next_in, ctx->zstream.next_out, | |
432 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
433 rc); | |
434 | |
435 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
436 "gunzip in_buf:%p pos:%p", | |
437 ctx->in_buf, ctx->in_buf->pos); | |
438 | |
439 if (ctx->zstream.next_in) { | |
440 ctx->in_buf->pos = ctx->zstream.next_in; | |
441 | |
442 if (ctx->zstream.avail_in == 0) { | |
443 ctx->zstream.next_in = NULL; | |
444 } | |
445 } | |
446 | |
447 ctx->out_buf->last = ctx->zstream.next_out; | |
448 | |
449 if (ctx->zstream.avail_out == 0) { | |
450 | |
451 /* zlib wants to output some more data */ | |
452 | |
453 cl = ngx_alloc_chain_link(r->pool); | |
454 if (cl == NULL) { | |
455 return NGX_ERROR; | |
456 } | |
457 | |
458 cl->buf = ctx->out_buf; | |
459 cl->next = NULL; | |
460 *ctx->last_out = cl; | |
461 ctx->last_out = &cl->next; | |
462 | |
463 ctx->redo = 1; | |
464 | |
465 return NGX_AGAIN; | |
466 } | |
467 | |
468 ctx->redo = 0; | |
469 | |
470 if (ctx->flush == Z_SYNC_FLUSH) { | |
471 | |
472 ctx->flush = Z_NO_FLUSH; | |
473 | |
474 cl = ngx_alloc_chain_link(r->pool); | |
475 if (cl == NULL) { | |
476 return NGX_ERROR; | |
477 } | |
478 | |
479 b = ctx->out_buf; | |
480 | |
481 if (ngx_buf_size(b) == 0) { | |
482 | |
483 b = ngx_calloc_buf(ctx->request->pool); | |
484 if (b == NULL) { | |
485 return NGX_ERROR; | |
486 } | |
487 | |
488 } else { | |
489 ctx->zstream.avail_out = 0; | |
490 } | |
491 | |
492 b->flush = 1; | |
493 | |
494 cl->buf = b; | |
495 cl->next = NULL; | |
496 *ctx->last_out = cl; | |
497 ctx->last_out = &cl->next; | |
498 | |
499 return NGX_OK; | |
500 } | |
501 | |
502 if (rc == Z_STREAM_END && ctx->flush == Z_FINISH | |
503 && ctx->zstream.avail_in == 0) | |
504 { | |
505 | |
506 if (ngx_http_gunzip_filter_inflate_end(r, ctx) != NGX_OK) { | |
507 return NGX_ERROR; | |
508 } | |
509 | |
510 return NGX_OK; | |
511 } | |
512 | |
513 if (rc == Z_STREAM_END && ctx->zstream.avail_in > 0) { | |
514 | |
515 rc = inflateReset(&ctx->zstream); | |
516 | |
517 if (rc != Z_OK) { | |
518 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
519 "inflateReset() failed: %d", rc); | |
520 return NGX_ERROR; | |
521 } | |
522 | |
523 ctx->redo = 1; | |
524 | |
525 return NGX_AGAIN; | |
526 } | |
527 | |
528 if (ctx->in == NULL) { | |
529 | |
530 b = ctx->out_buf; | |
531 | |
532 if (ngx_buf_size(b) == 0) { | |
533 return NGX_OK; | |
534 } | |
535 | |
536 cl = ngx_alloc_chain_link(r->pool); | |
537 if (cl == NULL) { | |
538 return NGX_ERROR; | |
539 } | |
540 | |
541 ctx->zstream.avail_out = 0; | |
542 | |
543 cl->buf = b; | |
544 cl->next = NULL; | |
545 *ctx->last_out = cl; | |
546 ctx->last_out = &cl->next; | |
547 | |
548 return NGX_OK; | |
549 } | |
550 | |
551 return NGX_AGAIN; | |
552 } | |
553 | |
554 | |
555 static ngx_int_t | |
556 ngx_http_gunzip_filter_inflate_end(ngx_http_request_t *r, | |
557 ngx_http_gunzip_ctx_t *ctx) | |
558 { | |
559 int rc; | |
560 ngx_buf_t *b; | |
561 ngx_chain_t *cl; | |
562 | |
563 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
564 "gunzip inflate end"); | |
565 | |
566 rc = inflateEnd(&ctx->zstream); | |
567 | |
568 if (rc != Z_OK) { | |
569 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
570 "inflateEnd() failed: %d", rc); | |
571 return NGX_ERROR; | |
572 } | |
573 | |
574 b = ctx->out_buf; | |
575 | |
576 if (ngx_buf_size(b) == 0) { | |
577 | |
578 b = ngx_calloc_buf(ctx->request->pool); | |
579 if (b == NULL) { | |
580 return NGX_ERROR; | |
581 } | |
582 } | |
583 | |
584 cl = ngx_alloc_chain_link(r->pool); | |
585 if (cl == NULL) { | |
586 return NGX_ERROR; | |
587 } | |
588 | |
589 cl->buf = b; | |
590 cl->next = NULL; | |
591 *ctx->last_out = cl; | |
592 ctx->last_out = &cl->next; | |
593 | |
594 b->last_buf = (r == r->main) ? 1 : 0; | |
595 b->last_in_chain = 1; | |
596 b->sync = 1; | |
597 | |
598 ctx->done = 1; | |
599 | |
600 return NGX_OK; | |
601 } | |
602 | |
603 | |
604 static void * | |
605 ngx_http_gunzip_filter_alloc(void *opaque, u_int items, u_int size) | |
606 { | |
607 ngx_http_gunzip_ctx_t *ctx = opaque; | |
608 | |
609 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
610 "gunzip alloc: n:%ud s:%ud", | |
611 items, size); | |
612 | |
613 return ngx_palloc(ctx->request->pool, items * size); | |
614 } | |
615 | |
616 | |
617 static void | |
618 ngx_http_gunzip_filter_free(void *opaque, void *address) | |
619 { | |
620 #if 0 | |
621 ngx_http_gunzip_ctx_t *ctx = opaque; | |
622 | |
623 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
624 "gunzip free: %p", address); | |
625 #endif | |
626 } | |
627 | |
628 | |
629 static void * | |
630 ngx_http_gunzip_create_conf(ngx_conf_t *cf) | |
631 { | |
632 ngx_http_gunzip_conf_t *conf; | |
633 | |
634 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gunzip_conf_t)); | |
635 if (conf == NULL) { | |
636 return NULL; | |
637 } | |
638 | |
639 /* | |
640 * set by ngx_pcalloc(): | |
641 * | |
642 * conf->bufs.num = 0; | |
643 */ | |
644 | |
645 conf->enable = NGX_CONF_UNSET; | |
646 | |
647 return conf; | |
648 } | |
649 | |
650 | |
651 static char * | |
652 ngx_http_gunzip_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
653 { | |
654 ngx_http_gunzip_conf_t *prev = parent; | |
655 ngx_http_gunzip_conf_t *conf = child; | |
656 | |
657 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
658 | |
659 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, | |
660 (128 * 1024) / ngx_pagesize, ngx_pagesize); | |
661 | |
662 return NGX_CONF_OK; | |
663 } | |
664 | |
665 | |
666 static ngx_int_t | |
667 ngx_http_gunzip_filter_init(ngx_conf_t *cf) | |
668 { | |
669 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
670 ngx_http_top_header_filter = ngx_http_gunzip_header_filter; | |
671 | |
672 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
673 ngx_http_top_body_filter = ngx_http_gunzip_body_filter; | |
674 | |
675 return NGX_OK; | |
676 } |