Mercurial > hg > nginx-quic
annotate src/http/modules/ngx_http_gunzip_filter_module.c @ 5801:ab48149b77a6
Style: use specified macro instead of magic-number.
author | Tatsuhiko Kubo <cubicdaiya@gmail.com> |
---|---|
date | Wed, 06 Aug 2014 23:58:44 +0900 |
parents | e491b26fa5a1 |
children | 973fded4f461 |
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); | |
5733
e491b26fa5a1
Entity tags: downgrade strong etags to weak ones as needed.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5436
diff
changeset
|
168 ngx_http_weak_etag(r); |
4837 | 169 |
170 return ngx_http_next_header_filter(r); | |
171 } | |
172 | |
173 | |
174 static ngx_int_t | |
175 ngx_http_gunzip_body_filter(ngx_http_request_t *r, ngx_chain_t *in) | |
176 { | |
177 int rc; | |
178 ngx_chain_t *cl; | |
179 ngx_http_gunzip_ctx_t *ctx; | |
180 | |
181 ctx = ngx_http_get_module_ctx(r, ngx_http_gunzip_filter_module); | |
182 | |
183 if (ctx == NULL || ctx->done) { | |
184 return ngx_http_next_body_filter(r, in); | |
185 } | |
186 | |
187 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
188 "http gunzip filter"); | |
189 | |
190 if (!ctx->started) { | |
191 if (ngx_http_gunzip_filter_inflate_start(r, ctx) != NGX_OK) { | |
192 goto failed; | |
193 } | |
194 } | |
195 | |
196 if (in) { | |
197 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { | |
198 goto failed; | |
199 } | |
200 } | |
201 | |
5432
c52a761a2029
Gzip, gunzip: flush pending data when incoming chain is NULL.
Yichun Zhang <agentzh@gmail.com>
parents:
4939
diff
changeset
|
202 if (ctx->nomem || in == NULL) { |
4837 | 203 |
204 /* flush busy buffers */ | |
205 | |
206 if (ngx_http_next_body_filter(r, NULL) == NGX_ERROR) { | |
207 goto failed; | |
208 } | |
209 | |
210 cl = NULL; | |
211 | |
212 ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &cl, | |
213 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
214 ctx->nomem = 0; | |
215 } | |
216 | |
217 for ( ;; ) { | |
218 | |
219 /* cycle while we can write to a client */ | |
220 | |
221 for ( ;; ) { | |
222 | |
223 /* cycle while there is data to feed zlib and ... */ | |
224 | |
225 rc = ngx_http_gunzip_filter_add_data(r, ctx); | |
226 | |
227 if (rc == NGX_DECLINED) { | |
228 break; | |
229 } | |
230 | |
231 if (rc == NGX_AGAIN) { | |
232 continue; | |
233 } | |
234 | |
235 | |
236 /* ... there are buffers to write zlib output */ | |
237 | |
238 rc = ngx_http_gunzip_filter_get_buf(r, ctx); | |
239 | |
240 if (rc == NGX_DECLINED) { | |
241 break; | |
242 } | |
243 | |
244 if (rc == NGX_ERROR) { | |
245 goto failed; | |
246 } | |
247 | |
248 rc = ngx_http_gunzip_filter_inflate(r, ctx); | |
249 | |
250 if (rc == NGX_OK) { | |
251 break; | |
252 } | |
253 | |
254 if (rc == NGX_ERROR) { | |
255 goto failed; | |
256 } | |
257 | |
258 /* rc == NGX_AGAIN */ | |
259 } | |
260 | |
261 if (ctx->out == NULL) { | |
262 return ctx->busy ? NGX_AGAIN : NGX_OK; | |
263 } | |
264 | |
265 rc = ngx_http_next_body_filter(r, ctx->out); | |
266 | |
267 if (rc == NGX_ERROR) { | |
268 goto failed; | |
269 } | |
270 | |
271 ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &ctx->out, | |
272 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
273 ctx->last_out = &ctx->out; | |
274 | |
275 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
276 "gunzip out: %p", ctx->out); | |
277 | |
278 ctx->nomem = 0; | |
279 | |
280 if (ctx->done) { | |
281 return rc; | |
282 } | |
283 } | |
284 | |
285 /* unreachable */ | |
286 | |
287 failed: | |
288 | |
289 ctx->done = 1; | |
290 | |
291 return NGX_ERROR; | |
292 } | |
293 | |
294 | |
295 static ngx_int_t | |
296 ngx_http_gunzip_filter_inflate_start(ngx_http_request_t *r, | |
297 ngx_http_gunzip_ctx_t *ctx) | |
298 { | |
299 int rc; | |
300 | |
301 ctx->zstream.next_in = Z_NULL; | |
302 ctx->zstream.avail_in = 0; | |
303 | |
304 ctx->zstream.zalloc = ngx_http_gunzip_filter_alloc; | |
305 ctx->zstream.zfree = ngx_http_gunzip_filter_free; | |
306 ctx->zstream.opaque = ctx; | |
307 | |
308 /* windowBits +16 to decode gzip, zlib 1.2.0.4+ */ | |
309 rc = inflateInit2(&ctx->zstream, MAX_WBITS + 16); | |
310 | |
311 if (rc != Z_OK) { | |
312 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
313 "inflateInit2() failed: %d", rc); | |
314 return NGX_ERROR; | |
315 } | |
316 | |
317 ctx->started = 1; | |
318 | |
319 ctx->last_out = &ctx->out; | |
320 ctx->flush = Z_NO_FLUSH; | |
321 | |
322 return NGX_OK; | |
323 } | |
324 | |
325 | |
326 static ngx_int_t | |
327 ngx_http_gunzip_filter_add_data(ngx_http_request_t *r, | |
328 ngx_http_gunzip_ctx_t *ctx) | |
329 { | |
330 if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) { | |
331 return NGX_OK; | |
332 } | |
333 | |
334 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
335 "gunzip in: %p", ctx->in); | |
336 | |
337 if (ctx->in == NULL) { | |
338 return NGX_DECLINED; | |
339 } | |
340 | |
341 ctx->in_buf = ctx->in->buf; | |
342 ctx->in = ctx->in->next; | |
343 | |
344 ctx->zstream.next_in = ctx->in_buf->pos; | |
345 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos; | |
346 | |
347 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
348 "gunzip in_buf:%p ni:%p ai:%ud", | |
349 ctx->in_buf, | |
350 ctx->zstream.next_in, ctx->zstream.avail_in); | |
351 | |
352 if (ctx->in_buf->last_buf || ctx->in_buf->last_in_chain) { | |
353 ctx->flush = Z_FINISH; | |
354 | |
355 } else if (ctx->in_buf->flush) { | |
356 ctx->flush = Z_SYNC_FLUSH; | |
357 | |
358 } else if (ctx->zstream.avail_in == 0) { | |
359 /* ctx->flush == Z_NO_FLUSH */ | |
360 return NGX_AGAIN; | |
361 } | |
362 | |
363 return NGX_OK; | |
364 } | |
365 | |
366 | |
367 static ngx_int_t | |
368 ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r, | |
369 ngx_http_gunzip_ctx_t *ctx) | |
370 { | |
371 ngx_http_gunzip_conf_t *conf; | |
372 | |
373 if (ctx->zstream.avail_out) { | |
374 return NGX_OK; | |
375 } | |
376 | |
377 conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module); | |
378 | |
379 if (ctx->free) { | |
380 ctx->out_buf = ctx->free->buf; | |
381 ctx->free = ctx->free->next; | |
382 | |
383 ctx->out_buf->flush = 0; | |
384 | |
385 } else if (ctx->bufs < conf->bufs.num) { | |
386 | |
387 ctx->out_buf = ngx_create_temp_buf(r->pool, conf->bufs.size); | |
388 if (ctx->out_buf == NULL) { | |
389 return NGX_ERROR; | |
390 } | |
391 | |
392 ctx->out_buf->tag = (ngx_buf_tag_t) &ngx_http_gunzip_filter_module; | |
393 ctx->out_buf->recycled = 1; | |
394 ctx->bufs++; | |
395 | |
396 } else { | |
397 ctx->nomem = 1; | |
398 return NGX_DECLINED; | |
399 } | |
400 | |
401 ctx->zstream.next_out = ctx->out_buf->pos; | |
402 ctx->zstream.avail_out = conf->bufs.size; | |
403 | |
404 return NGX_OK; | |
405 } | |
406 | |
407 | |
408 static ngx_int_t | |
409 ngx_http_gunzip_filter_inflate(ngx_http_request_t *r, | |
410 ngx_http_gunzip_ctx_t *ctx) | |
411 { | |
412 int rc; | |
413 ngx_buf_t *b; | |
414 ngx_chain_t *cl; | |
415 | |
416 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
417 "inflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d", | |
418 ctx->zstream.next_in, ctx->zstream.next_out, | |
419 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
420 ctx->flush, ctx->redo); | |
421 | |
422 rc = inflate(&ctx->zstream, ctx->flush); | |
423 | |
424 if (rc != Z_OK && rc != Z_STREAM_END && rc != Z_BUF_ERROR) { | |
5435
2bb2571d6e34
Gunzip: "error" logging level on inflate() errors.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5432
diff
changeset
|
425 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
4837 | 426 "inflate() failed: %d, %d", ctx->flush, rc); |
427 return NGX_ERROR; | |
428 } | |
429 | |
430 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
431 "inflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d", | |
432 ctx->zstream.next_in, ctx->zstream.next_out, | |
433 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
434 rc); | |
435 | |
436 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
437 "gunzip in_buf:%p pos:%p", | |
438 ctx->in_buf, ctx->in_buf->pos); | |
439 | |
440 if (ctx->zstream.next_in) { | |
441 ctx->in_buf->pos = ctx->zstream.next_in; | |
442 | |
443 if (ctx->zstream.avail_in == 0) { | |
444 ctx->zstream.next_in = NULL; | |
445 } | |
446 } | |
447 | |
448 ctx->out_buf->last = ctx->zstream.next_out; | |
449 | |
450 if (ctx->zstream.avail_out == 0) { | |
451 | |
452 /* zlib wants to output some more data */ | |
453 | |
454 cl = ngx_alloc_chain_link(r->pool); | |
455 if (cl == NULL) { | |
456 return NGX_ERROR; | |
457 } | |
458 | |
459 cl->buf = ctx->out_buf; | |
460 cl->next = NULL; | |
461 *ctx->last_out = cl; | |
462 ctx->last_out = &cl->next; | |
463 | |
464 ctx->redo = 1; | |
465 | |
466 return NGX_AGAIN; | |
467 } | |
468 | |
469 ctx->redo = 0; | |
470 | |
471 if (ctx->flush == Z_SYNC_FLUSH) { | |
472 | |
473 ctx->flush = Z_NO_FLUSH; | |
474 | |
475 cl = ngx_alloc_chain_link(r->pool); | |
476 if (cl == NULL) { | |
477 return NGX_ERROR; | |
478 } | |
479 | |
480 b = ctx->out_buf; | |
481 | |
482 if (ngx_buf_size(b) == 0) { | |
483 | |
484 b = ngx_calloc_buf(ctx->request->pool); | |
485 if (b == NULL) { | |
486 return NGX_ERROR; | |
487 } | |
488 | |
489 } else { | |
490 ctx->zstream.avail_out = 0; | |
491 } | |
492 | |
493 b->flush = 1; | |
494 | |
495 cl->buf = b; | |
496 cl->next = NULL; | |
497 *ctx->last_out = cl; | |
498 ctx->last_out = &cl->next; | |
499 | |
500 return NGX_OK; | |
501 } | |
502 | |
5436
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
503 if (ctx->flush == Z_FINISH && ctx->zstream.avail_in == 0) { |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
504 |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
505 if (rc != Z_STREAM_END) { |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
506 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
507 "inflate() returned %d on response end", rc); |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
508 return NGX_ERROR; |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
509 } |
4837 | 510 |
511 if (ngx_http_gunzip_filter_inflate_end(r, ctx) != NGX_OK) { | |
512 return NGX_ERROR; | |
513 } | |
514 | |
515 return NGX_OK; | |
516 } | |
517 | |
518 if (rc == Z_STREAM_END && ctx->zstream.avail_in > 0) { | |
519 | |
520 rc = inflateReset(&ctx->zstream); | |
521 | |
522 if (rc != Z_OK) { | |
523 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
524 "inflateReset() failed: %d", rc); | |
525 return NGX_ERROR; | |
526 } | |
527 | |
528 ctx->redo = 1; | |
529 | |
530 return NGX_AGAIN; | |
531 } | |
532 | |
533 if (ctx->in == NULL) { | |
534 | |
535 b = ctx->out_buf; | |
536 | |
537 if (ngx_buf_size(b) == 0) { | |
538 return NGX_OK; | |
539 } | |
540 | |
541 cl = ngx_alloc_chain_link(r->pool); | |
542 if (cl == NULL) { | |
543 return NGX_ERROR; | |
544 } | |
545 | |
546 ctx->zstream.avail_out = 0; | |
547 | |
548 cl->buf = b; | |
549 cl->next = NULL; | |
550 *ctx->last_out = cl; | |
551 ctx->last_out = &cl->next; | |
552 | |
553 return NGX_OK; | |
554 } | |
555 | |
556 return NGX_AGAIN; | |
557 } | |
558 | |
559 | |
560 static ngx_int_t | |
561 ngx_http_gunzip_filter_inflate_end(ngx_http_request_t *r, | |
562 ngx_http_gunzip_ctx_t *ctx) | |
563 { | |
564 int rc; | |
565 ngx_buf_t *b; | |
566 ngx_chain_t *cl; | |
567 | |
568 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
569 "gunzip inflate end"); | |
570 | |
571 rc = inflateEnd(&ctx->zstream); | |
572 | |
573 if (rc != Z_OK) { | |
574 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
575 "inflateEnd() failed: %d", rc); | |
576 return NGX_ERROR; | |
577 } | |
578 | |
579 b = ctx->out_buf; | |
580 | |
581 if (ngx_buf_size(b) == 0) { | |
582 | |
583 b = ngx_calloc_buf(ctx->request->pool); | |
584 if (b == NULL) { | |
585 return NGX_ERROR; | |
586 } | |
587 } | |
588 | |
589 cl = ngx_alloc_chain_link(r->pool); | |
590 if (cl == NULL) { | |
591 return NGX_ERROR; | |
592 } | |
593 | |
594 cl->buf = b; | |
595 cl->next = NULL; | |
596 *ctx->last_out = cl; | |
597 ctx->last_out = &cl->next; | |
598 | |
599 b->last_buf = (r == r->main) ? 1 : 0; | |
600 b->last_in_chain = 1; | |
601 b->sync = 1; | |
602 | |
603 ctx->done = 1; | |
604 | |
605 return NGX_OK; | |
606 } | |
607 | |
608 | |
609 static void * | |
610 ngx_http_gunzip_filter_alloc(void *opaque, u_int items, u_int size) | |
611 { | |
612 ngx_http_gunzip_ctx_t *ctx = opaque; | |
613 | |
614 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
615 "gunzip alloc: n:%ud s:%ud", | |
616 items, size); | |
617 | |
618 return ngx_palloc(ctx->request->pool, items * size); | |
619 } | |
620 | |
621 | |
622 static void | |
623 ngx_http_gunzip_filter_free(void *opaque, void *address) | |
624 { | |
625 #if 0 | |
626 ngx_http_gunzip_ctx_t *ctx = opaque; | |
627 | |
628 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
629 "gunzip free: %p", address); | |
630 #endif | |
631 } | |
632 | |
633 | |
634 static void * | |
635 ngx_http_gunzip_create_conf(ngx_conf_t *cf) | |
636 { | |
637 ngx_http_gunzip_conf_t *conf; | |
638 | |
639 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gunzip_conf_t)); | |
640 if (conf == NULL) { | |
641 return NULL; | |
642 } | |
643 | |
644 /* | |
645 * set by ngx_pcalloc(): | |
646 * | |
647 * conf->bufs.num = 0; | |
648 */ | |
649 | |
650 conf->enable = NGX_CONF_UNSET; | |
651 | |
652 return conf; | |
653 } | |
654 | |
655 | |
656 static char * | |
657 ngx_http_gunzip_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
658 { | |
659 ngx_http_gunzip_conf_t *prev = parent; | |
660 ngx_http_gunzip_conf_t *conf = child; | |
661 | |
662 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
663 | |
664 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, | |
665 (128 * 1024) / ngx_pagesize, ngx_pagesize); | |
666 | |
667 return NGX_CONF_OK; | |
668 } | |
669 | |
670 | |
671 static ngx_int_t | |
672 ngx_http_gunzip_filter_init(ngx_conf_t *cf) | |
673 { | |
674 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
675 ngx_http_top_header_filter = ngx_http_gunzip_header_filter; | |
676 | |
677 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
678 ngx_http_top_body_filter = ngx_http_gunzip_body_filter; | |
679 | |
680 return NGX_OK; | |
681 } |