Mercurial > hg > nginx
annotate src/http/modules/ngx_http_gunzip_filter_module.c @ 8383:7ea34e13937f quic
Address validation using Retry packets.
The behaviour is toggled with the new directive "quic_retry on|off".
QUIC token construction is made suitable for issuing with NEW_TOKEN.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Thu, 14 May 2020 15:47:18 +0300 |
parents | 973fded4f461 |
children |
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
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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; | |
5876
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
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178 ngx_uint_t flush; |
4837 | 179 ngx_chain_t *cl; |
180 ngx_http_gunzip_ctx_t *ctx; | |
181 | |
182 ctx = ngx_http_get_module_ctx(r, ngx_http_gunzip_filter_module); | |
183 | |
184 if (ctx == NULL || ctx->done) { | |
185 return ngx_http_next_body_filter(r, in); | |
186 } | |
187 | |
188 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
189 "http gunzip filter"); | |
190 | |
191 if (!ctx->started) { | |
192 if (ngx_http_gunzip_filter_inflate_start(r, ctx) != NGX_OK) { | |
193 goto failed; | |
194 } | |
195 } | |
196 | |
197 if (in) { | |
198 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) { | |
199 goto failed; | |
200 } | |
201 } | |
202 | |
5876
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
|
203 if (ctx->nomem) { |
4837 | 204 |
205 /* flush busy buffers */ | |
206 | |
207 if (ngx_http_next_body_filter(r, NULL) == NGX_ERROR) { | |
208 goto failed; | |
209 } | |
210 | |
211 cl = NULL; | |
212 | |
213 ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &cl, | |
214 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
215 ctx->nomem = 0; | |
5876
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
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216 flush = 0; |
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
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217 |
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
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218 } else { |
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
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219 flush = ctx->busy ? 1 : 0; |
4837 | 220 } |
221 | |
222 for ( ;; ) { | |
223 | |
224 /* cycle while we can write to a client */ | |
225 | |
226 for ( ;; ) { | |
227 | |
228 /* cycle while there is data to feed zlib and ... */ | |
229 | |
230 rc = ngx_http_gunzip_filter_add_data(r, ctx); | |
231 | |
232 if (rc == NGX_DECLINED) { | |
233 break; | |
234 } | |
235 | |
236 if (rc == NGX_AGAIN) { | |
237 continue; | |
238 } | |
239 | |
240 | |
241 /* ... there are buffers to write zlib output */ | |
242 | |
243 rc = ngx_http_gunzip_filter_get_buf(r, ctx); | |
244 | |
245 if (rc == NGX_DECLINED) { | |
246 break; | |
247 } | |
248 | |
249 if (rc == NGX_ERROR) { | |
250 goto failed; | |
251 } | |
252 | |
253 rc = ngx_http_gunzip_filter_inflate(r, ctx); | |
254 | |
255 if (rc == NGX_OK) { | |
256 break; | |
257 } | |
258 | |
259 if (rc == NGX_ERROR) { | |
260 goto failed; | |
261 } | |
262 | |
263 /* rc == NGX_AGAIN */ | |
264 } | |
265 | |
5876
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
|
266 if (ctx->out == NULL && !flush) { |
4837 | 267 return ctx->busy ? NGX_AGAIN : NGX_OK; |
268 } | |
269 | |
270 rc = ngx_http_next_body_filter(r, ctx->out); | |
271 | |
272 if (rc == NGX_ERROR) { | |
273 goto failed; | |
274 } | |
275 | |
276 ngx_chain_update_chains(r->pool, &ctx->free, &ctx->busy, &ctx->out, | |
277 (ngx_buf_tag_t) &ngx_http_gunzip_filter_module); | |
278 ctx->last_out = &ctx->out; | |
279 | |
280 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
281 "gunzip out: %p", ctx->out); | |
282 | |
283 ctx->nomem = 0; | |
5876
973fded4f461
Gzip, gunzip: flush busy buffers if any.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5733
diff
changeset
|
284 flush = 0; |
4837 | 285 |
286 if (ctx->done) { | |
287 return rc; | |
288 } | |
289 } | |
290 | |
291 /* unreachable */ | |
292 | |
293 failed: | |
294 | |
295 ctx->done = 1; | |
296 | |
297 return NGX_ERROR; | |
298 } | |
299 | |
300 | |
301 static ngx_int_t | |
302 ngx_http_gunzip_filter_inflate_start(ngx_http_request_t *r, | |
303 ngx_http_gunzip_ctx_t *ctx) | |
304 { | |
305 int rc; | |
306 | |
307 ctx->zstream.next_in = Z_NULL; | |
308 ctx->zstream.avail_in = 0; | |
309 | |
310 ctx->zstream.zalloc = ngx_http_gunzip_filter_alloc; | |
311 ctx->zstream.zfree = ngx_http_gunzip_filter_free; | |
312 ctx->zstream.opaque = ctx; | |
313 | |
314 /* windowBits +16 to decode gzip, zlib 1.2.0.4+ */ | |
315 rc = inflateInit2(&ctx->zstream, MAX_WBITS + 16); | |
316 | |
317 if (rc != Z_OK) { | |
318 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
319 "inflateInit2() failed: %d", rc); | |
320 return NGX_ERROR; | |
321 } | |
322 | |
323 ctx->started = 1; | |
324 | |
325 ctx->last_out = &ctx->out; | |
326 ctx->flush = Z_NO_FLUSH; | |
327 | |
328 return NGX_OK; | |
329 } | |
330 | |
331 | |
332 static ngx_int_t | |
333 ngx_http_gunzip_filter_add_data(ngx_http_request_t *r, | |
334 ngx_http_gunzip_ctx_t *ctx) | |
335 { | |
336 if (ctx->zstream.avail_in || ctx->flush != Z_NO_FLUSH || ctx->redo) { | |
337 return NGX_OK; | |
338 } | |
339 | |
340 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
341 "gunzip in: %p", ctx->in); | |
342 | |
343 if (ctx->in == NULL) { | |
344 return NGX_DECLINED; | |
345 } | |
346 | |
347 ctx->in_buf = ctx->in->buf; | |
348 ctx->in = ctx->in->next; | |
349 | |
350 ctx->zstream.next_in = ctx->in_buf->pos; | |
351 ctx->zstream.avail_in = ctx->in_buf->last - ctx->in_buf->pos; | |
352 | |
353 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
354 "gunzip in_buf:%p ni:%p ai:%ud", | |
355 ctx->in_buf, | |
356 ctx->zstream.next_in, ctx->zstream.avail_in); | |
357 | |
358 if (ctx->in_buf->last_buf || ctx->in_buf->last_in_chain) { | |
359 ctx->flush = Z_FINISH; | |
360 | |
361 } else if (ctx->in_buf->flush) { | |
362 ctx->flush = Z_SYNC_FLUSH; | |
363 | |
364 } else if (ctx->zstream.avail_in == 0) { | |
365 /* ctx->flush == Z_NO_FLUSH */ | |
366 return NGX_AGAIN; | |
367 } | |
368 | |
369 return NGX_OK; | |
370 } | |
371 | |
372 | |
373 static ngx_int_t | |
374 ngx_http_gunzip_filter_get_buf(ngx_http_request_t *r, | |
375 ngx_http_gunzip_ctx_t *ctx) | |
376 { | |
377 ngx_http_gunzip_conf_t *conf; | |
378 | |
379 if (ctx->zstream.avail_out) { | |
380 return NGX_OK; | |
381 } | |
382 | |
383 conf = ngx_http_get_module_loc_conf(r, ngx_http_gunzip_filter_module); | |
384 | |
385 if (ctx->free) { | |
386 ctx->out_buf = ctx->free->buf; | |
387 ctx->free = ctx->free->next; | |
388 | |
389 ctx->out_buf->flush = 0; | |
390 | |
391 } else if (ctx->bufs < conf->bufs.num) { | |
392 | |
393 ctx->out_buf = ngx_create_temp_buf(r->pool, conf->bufs.size); | |
394 if (ctx->out_buf == NULL) { | |
395 return NGX_ERROR; | |
396 } | |
397 | |
398 ctx->out_buf->tag = (ngx_buf_tag_t) &ngx_http_gunzip_filter_module; | |
399 ctx->out_buf->recycled = 1; | |
400 ctx->bufs++; | |
401 | |
402 } else { | |
403 ctx->nomem = 1; | |
404 return NGX_DECLINED; | |
405 } | |
406 | |
407 ctx->zstream.next_out = ctx->out_buf->pos; | |
408 ctx->zstream.avail_out = conf->bufs.size; | |
409 | |
410 return NGX_OK; | |
411 } | |
412 | |
413 | |
414 static ngx_int_t | |
415 ngx_http_gunzip_filter_inflate(ngx_http_request_t *r, | |
416 ngx_http_gunzip_ctx_t *ctx) | |
417 { | |
418 int rc; | |
419 ngx_buf_t *b; | |
420 ngx_chain_t *cl; | |
421 | |
422 ngx_log_debug6(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
423 "inflate in: ni:%p no:%p ai:%ud ao:%ud fl:%d redo:%d", | |
424 ctx->zstream.next_in, ctx->zstream.next_out, | |
425 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
426 ctx->flush, ctx->redo); | |
427 | |
428 rc = inflate(&ctx->zstream, ctx->flush); | |
429 | |
430 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
|
431 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, |
4837 | 432 "inflate() failed: %d, %d", ctx->flush, rc); |
433 return NGX_ERROR; | |
434 } | |
435 | |
436 ngx_log_debug5(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
437 "inflate out: ni:%p no:%p ai:%ud ao:%ud rc:%d", | |
438 ctx->zstream.next_in, ctx->zstream.next_out, | |
439 ctx->zstream.avail_in, ctx->zstream.avail_out, | |
440 rc); | |
441 | |
442 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
443 "gunzip in_buf:%p pos:%p", | |
444 ctx->in_buf, ctx->in_buf->pos); | |
445 | |
446 if (ctx->zstream.next_in) { | |
447 ctx->in_buf->pos = ctx->zstream.next_in; | |
448 | |
449 if (ctx->zstream.avail_in == 0) { | |
450 ctx->zstream.next_in = NULL; | |
451 } | |
452 } | |
453 | |
454 ctx->out_buf->last = ctx->zstream.next_out; | |
455 | |
456 if (ctx->zstream.avail_out == 0) { | |
457 | |
458 /* zlib wants to output some more data */ | |
459 | |
460 cl = ngx_alloc_chain_link(r->pool); | |
461 if (cl == NULL) { | |
462 return NGX_ERROR; | |
463 } | |
464 | |
465 cl->buf = ctx->out_buf; | |
466 cl->next = NULL; | |
467 *ctx->last_out = cl; | |
468 ctx->last_out = &cl->next; | |
469 | |
470 ctx->redo = 1; | |
471 | |
472 return NGX_AGAIN; | |
473 } | |
474 | |
475 ctx->redo = 0; | |
476 | |
477 if (ctx->flush == Z_SYNC_FLUSH) { | |
478 | |
479 ctx->flush = Z_NO_FLUSH; | |
480 | |
481 cl = ngx_alloc_chain_link(r->pool); | |
482 if (cl == NULL) { | |
483 return NGX_ERROR; | |
484 } | |
485 | |
486 b = ctx->out_buf; | |
487 | |
488 if (ngx_buf_size(b) == 0) { | |
489 | |
490 b = ngx_calloc_buf(ctx->request->pool); | |
491 if (b == NULL) { | |
492 return NGX_ERROR; | |
493 } | |
494 | |
495 } else { | |
496 ctx->zstream.avail_out = 0; | |
497 } | |
498 | |
499 b->flush = 1; | |
500 | |
501 cl->buf = b; | |
502 cl->next = NULL; | |
503 *ctx->last_out = cl; | |
504 ctx->last_out = &cl->next; | |
505 | |
506 return NGX_OK; | |
507 } | |
508 | |
5436
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
509 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
|
510 |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
511 if (rc != Z_STREAM_END) { |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
512 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
|
513 "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
|
514 return NGX_ERROR; |
6aa75f4982ce
Gunzip: proper error handling on gunzipping an empty response.
Maxim Dounin <mdounin@mdounin.ru>
parents:
5435
diff
changeset
|
515 } |
4837 | 516 |
517 if (ngx_http_gunzip_filter_inflate_end(r, ctx) != NGX_OK) { | |
518 return NGX_ERROR; | |
519 } | |
520 | |
521 return NGX_OK; | |
522 } | |
523 | |
524 if (rc == Z_STREAM_END && ctx->zstream.avail_in > 0) { | |
525 | |
526 rc = inflateReset(&ctx->zstream); | |
527 | |
528 if (rc != Z_OK) { | |
529 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
530 "inflateReset() failed: %d", rc); | |
531 return NGX_ERROR; | |
532 } | |
533 | |
534 ctx->redo = 1; | |
535 | |
536 return NGX_AGAIN; | |
537 } | |
538 | |
539 if (ctx->in == NULL) { | |
540 | |
541 b = ctx->out_buf; | |
542 | |
543 if (ngx_buf_size(b) == 0) { | |
544 return NGX_OK; | |
545 } | |
546 | |
547 cl = ngx_alloc_chain_link(r->pool); | |
548 if (cl == NULL) { | |
549 return NGX_ERROR; | |
550 } | |
551 | |
552 ctx->zstream.avail_out = 0; | |
553 | |
554 cl->buf = b; | |
555 cl->next = NULL; | |
556 *ctx->last_out = cl; | |
557 ctx->last_out = &cl->next; | |
558 | |
559 return NGX_OK; | |
560 } | |
561 | |
562 return NGX_AGAIN; | |
563 } | |
564 | |
565 | |
566 static ngx_int_t | |
567 ngx_http_gunzip_filter_inflate_end(ngx_http_request_t *r, | |
568 ngx_http_gunzip_ctx_t *ctx) | |
569 { | |
570 int rc; | |
571 ngx_buf_t *b; | |
572 ngx_chain_t *cl; | |
573 | |
574 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, | |
575 "gunzip inflate end"); | |
576 | |
577 rc = inflateEnd(&ctx->zstream); | |
578 | |
579 if (rc != Z_OK) { | |
580 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0, | |
581 "inflateEnd() failed: %d", rc); | |
582 return NGX_ERROR; | |
583 } | |
584 | |
585 b = ctx->out_buf; | |
586 | |
587 if (ngx_buf_size(b) == 0) { | |
588 | |
589 b = ngx_calloc_buf(ctx->request->pool); | |
590 if (b == NULL) { | |
591 return NGX_ERROR; | |
592 } | |
593 } | |
594 | |
595 cl = ngx_alloc_chain_link(r->pool); | |
596 if (cl == NULL) { | |
597 return NGX_ERROR; | |
598 } | |
599 | |
600 cl->buf = b; | |
601 cl->next = NULL; | |
602 *ctx->last_out = cl; | |
603 ctx->last_out = &cl->next; | |
604 | |
605 b->last_buf = (r == r->main) ? 1 : 0; | |
606 b->last_in_chain = 1; | |
607 b->sync = 1; | |
608 | |
609 ctx->done = 1; | |
610 | |
611 return NGX_OK; | |
612 } | |
613 | |
614 | |
615 static void * | |
616 ngx_http_gunzip_filter_alloc(void *opaque, u_int items, u_int size) | |
617 { | |
618 ngx_http_gunzip_ctx_t *ctx = opaque; | |
619 | |
620 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
621 "gunzip alloc: n:%ud s:%ud", | |
622 items, size); | |
623 | |
624 return ngx_palloc(ctx->request->pool, items * size); | |
625 } | |
626 | |
627 | |
628 static void | |
629 ngx_http_gunzip_filter_free(void *opaque, void *address) | |
630 { | |
631 #if 0 | |
632 ngx_http_gunzip_ctx_t *ctx = opaque; | |
633 | |
634 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, ctx->request->connection->log, 0, | |
635 "gunzip free: %p", address); | |
636 #endif | |
637 } | |
638 | |
639 | |
640 static void * | |
641 ngx_http_gunzip_create_conf(ngx_conf_t *cf) | |
642 { | |
643 ngx_http_gunzip_conf_t *conf; | |
644 | |
645 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_gunzip_conf_t)); | |
646 if (conf == NULL) { | |
647 return NULL; | |
648 } | |
649 | |
650 /* | |
651 * set by ngx_pcalloc(): | |
652 * | |
653 * conf->bufs.num = 0; | |
654 */ | |
655 | |
656 conf->enable = NGX_CONF_UNSET; | |
657 | |
658 return conf; | |
659 } | |
660 | |
661 | |
662 static char * | |
663 ngx_http_gunzip_merge_conf(ngx_conf_t *cf, void *parent, void *child) | |
664 { | |
665 ngx_http_gunzip_conf_t *prev = parent; | |
666 ngx_http_gunzip_conf_t *conf = child; | |
667 | |
668 ngx_conf_merge_value(conf->enable, prev->enable, 0); | |
669 | |
670 ngx_conf_merge_bufs_value(conf->bufs, prev->bufs, | |
671 (128 * 1024) / ngx_pagesize, ngx_pagesize); | |
672 | |
673 return NGX_CONF_OK; | |
674 } | |
675 | |
676 | |
677 static ngx_int_t | |
678 ngx_http_gunzip_filter_init(ngx_conf_t *cf) | |
679 { | |
680 ngx_http_next_header_filter = ngx_http_top_header_filter; | |
681 ngx_http_top_header_filter = ngx_http_gunzip_header_filter; | |
682 | |
683 ngx_http_next_body_filter = ngx_http_top_body_filter; | |
684 ngx_http_top_body_filter = ngx_http_gunzip_body_filter; | |
685 | |
686 return NGX_OK; | |
687 } |