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