|
296
|
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 {
|
|
|
13 ngx_str_t match;
|
|
|
14 ngx_str_t sub;
|
|
|
15
|
|
394
|
16 ngx_hash_t types;
|
|
296
|
17
|
|
|
18 ngx_array_t *sub_lengths;
|
|
|
19 ngx_array_t *sub_values;
|
|
|
20
|
|
|
21 ngx_flag_t once;
|
|
394
|
22
|
|
|
23 ngx_array_t *types_keys;
|
|
296
|
24 } ngx_http_sub_loc_conf_t;
|
|
|
25
|
|
|
26
|
|
|
27 typedef enum {
|
|
|
28 sub_start_state = 0,
|
|
|
29 sub_match_state,
|
|
|
30 } ngx_http_sub_state_e;
|
|
|
31
|
|
|
32
|
|
|
33 typedef struct {
|
|
|
34 ngx_str_t match;
|
|
|
35
|
|
|
36 ngx_uint_t once; /* unsigned once:1 */
|
|
|
37
|
|
|
38 ngx_buf_t *buf;
|
|
|
39
|
|
|
40 u_char *pos;
|
|
|
41 u_char *copy_start;
|
|
|
42 u_char *copy_end;
|
|
|
43
|
|
|
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;
|
|
|
49
|
|
|
50 ngx_str_t sub;
|
|
|
51
|
|
|
52 ngx_uint_t state;
|
|
|
53 size_t saved;
|
|
|
54 size_t looked;
|
|
|
55 } ngx_http_sub_ctx_t;
|
|
|
56
|
|
|
57
|
|
|
58 static ngx_int_t ngx_http_sub_output(ngx_http_request_t *r,
|
|
|
59 ngx_http_sub_ctx_t *ctx);
|
|
|
60 static ngx_int_t ngx_http_sub_parse(ngx_http_request_t *r,
|
|
|
61 ngx_http_sub_ctx_t *ctx);
|
|
|
62
|
|
|
63 static char * ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
64 void *conf);
|
|
|
65 static void *ngx_http_sub_create_conf(ngx_conf_t *cf);
|
|
|
66 static char *ngx_http_sub_merge_conf(ngx_conf_t *cf,
|
|
|
67 void *parent, void *child);
|
|
|
68 static ngx_int_t ngx_http_sub_filter_init(ngx_conf_t *cf);
|
|
|
69
|
|
|
70
|
|
|
71 static ngx_command_t ngx_http_sub_filter_commands[] = {
|
|
|
72
|
|
|
73 { ngx_string("sub_filter"),
|
|
|
74 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
|
|
|
75 ngx_http_sub_filter,
|
|
|
76 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
77 0,
|
|
|
78 NULL },
|
|
|
79
|
|
|
80 { ngx_string("sub_filter_types"),
|
|
|
81 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
|
|
394
|
82 ngx_http_types_slot,
|
|
296
|
83 NGX_HTTP_LOC_CONF_OFFSET,
|
|
394
|
84 offsetof(ngx_http_sub_loc_conf_t, types_keys),
|
|
|
85 &ngx_http_html_default_types[0] },
|
|
296
|
86
|
|
|
87 { ngx_string("sub_filter_once"),
|
|
|
88 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
|
|
|
89 ngx_conf_set_flag_slot,
|
|
|
90 NGX_HTTP_LOC_CONF_OFFSET,
|
|
|
91 offsetof(ngx_http_sub_loc_conf_t, once),
|
|
|
92 NULL },
|
|
|
93
|
|
|
94 ngx_null_command
|
|
|
95 };
|
|
|
96
|
|
|
97
|
|
|
98 static ngx_http_module_t ngx_http_sub_filter_module_ctx = {
|
|
|
99 NULL, /* preconfiguration */
|
|
|
100 ngx_http_sub_filter_init, /* postconfiguration */
|
|
|
101
|
|
|
102 NULL, /* create main configuration */
|
|
|
103 NULL, /* init main configuration */
|
|
|
104
|
|
|
105 NULL, /* create server configuration */
|
|
|
106 NULL, /* merge server configuration */
|
|
|
107
|
|
|
108 ngx_http_sub_create_conf, /* create location configuration */
|
|
|
109 ngx_http_sub_merge_conf /* merge location configuration */
|
|
|
110 };
|
|
|
111
|
|
|
112
|
|
|
113 ngx_module_t ngx_http_sub_filter_module = {
|
|
|
114 NGX_MODULE_V1,
|
|
|
115 &ngx_http_sub_filter_module_ctx, /* module context */
|
|
|
116 ngx_http_sub_filter_commands, /* module directives */
|
|
|
117 NGX_HTTP_MODULE, /* module type */
|
|
|
118 NULL, /* init master */
|
|
|
119 NULL, /* init module */
|
|
|
120 NULL, /* init process */
|
|
|
121 NULL, /* init thread */
|
|
|
122 NULL, /* exit thread */
|
|
|
123 NULL, /* exit process */
|
|
|
124 NULL, /* exit master */
|
|
|
125 NGX_MODULE_V1_PADDING
|
|
|
126 };
|
|
|
127
|
|
|
128
|
|
|
129 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
|
|
|
130 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
|
|
|
131
|
|
|
132
|
|
|
133 static ngx_int_t
|
|
|
134 ngx_http_sub_header_filter(ngx_http_request_t *r)
|
|
|
135 {
|
|
|
136 ngx_http_sub_ctx_t *ctx;
|
|
|
137 ngx_http_sub_loc_conf_t *slcf;
|
|
|
138
|
|
|
139 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
|
|
|
140
|
|
|
141 if (slcf->match.len == 0
|
|
394
|
142 || r->headers_out.content_length_n == 0
|
|
|
143 || ngx_http_test_content_type(r, &slcf->types) == NULL)
|
|
296
|
144 {
|
|
|
145 return ngx_http_next_header_filter(r);
|
|
|
146 }
|
|
|
147
|
|
|
148 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_sub_ctx_t));
|
|
|
149 if (ctx == NULL) {
|
|
|
150 return NGX_ERROR;
|
|
|
151 }
|
|
|
152
|
|
|
153 ngx_http_set_ctx(r, ctx, ngx_http_sub_filter_module);
|
|
|
154
|
|
|
155 ctx->match = slcf->match;
|
|
|
156 ctx->last_out = &ctx->out;
|
|
|
157 ctx->sub = slcf->sub;
|
|
|
158
|
|
|
159 r->filter_need_in_memory = 1;
|
|
|
160
|
|
|
161 if (r == r->main) {
|
|
|
162 ngx_http_clear_content_length(r);
|
|
|
163 ngx_http_clear_last_modified(r);
|
|
|
164 }
|
|
|
165
|
|
|
166 return ngx_http_next_header_filter(r);
|
|
|
167 }
|
|
|
168
|
|
|
169
|
|
|
170 static ngx_int_t
|
|
|
171 ngx_http_sub_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
172 {
|
|
|
173 ngx_int_t rc;
|
|
|
174 ngx_buf_t *b;
|
|
|
175 ngx_chain_t *cl;
|
|
|
176 ngx_http_sub_ctx_t *ctx;
|
|
|
177 ngx_http_sub_loc_conf_t *slcf;
|
|
|
178
|
|
|
179 ctx = ngx_http_get_module_ctx(r, ngx_http_sub_filter_module);
|
|
|
180
|
|
|
181 if (ctx == NULL) {
|
|
|
182 return ngx_http_next_body_filter(r, in);
|
|
|
183 }
|
|
|
184
|
|
|
185 if ((in == NULL
|
|
|
186 && ctx->buf == NULL
|
|
|
187 && ctx->in == NULL
|
|
|
188 && ctx->busy == NULL))
|
|
|
189 {
|
|
|
190 return ngx_http_next_body_filter(r, in);
|
|
|
191 }
|
|
|
192
|
|
|
193 if (ctx->once && (ctx->buf == NULL || ctx->in == NULL)) {
|
|
|
194
|
|
|
195 if (ctx->busy) {
|
|
|
196 if (ngx_http_sub_output(r, ctx) == NGX_ERROR) {
|
|
|
197 return NGX_ERROR;
|
|
|
198 }
|
|
|
199 }
|
|
|
200
|
|
|
201 return ngx_http_next_body_filter(r, in);
|
|
|
202 }
|
|
|
203
|
|
|
204 /* add the incoming chain to the chain ctx->in */
|
|
|
205
|
|
|
206 if (in) {
|
|
454
|
207 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) {
|
|
296
|
208 return NGX_ERROR;
|
|
|
209 }
|
|
|
210 }
|
|
|
211
|
|
|
212 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
213 "http sub filter \"%V\"", &r->uri);
|
|
|
214
|
|
|
215 while (ctx->in || ctx->buf) {
|
|
|
216
|
|
|
217 if (ctx->buf == NULL ){
|
|
|
218 ctx->buf = ctx->in->buf;
|
|
|
219 ctx->in = ctx->in->next;
|
|
|
220 ctx->pos = ctx->buf->pos;
|
|
|
221 }
|
|
|
222
|
|
|
223 if (ctx->state == sub_start_state) {
|
|
|
224 ctx->copy_start = ctx->pos;
|
|
|
225 ctx->copy_end = ctx->pos;
|
|
|
226 }
|
|
|
227
|
|
|
228 b = NULL;
|
|
|
229
|
|
|
230 while (ctx->pos < ctx->buf->last) {
|
|
|
231
|
|
|
232 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
233 "saved: %d state: %d", ctx->saved, ctx->state);
|
|
|
234
|
|
|
235 rc = ngx_http_sub_parse(r, ctx);
|
|
|
236
|
|
|
237 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
238 "parse: %d, looked: %d %p-%p",
|
|
|
239 rc, ctx->looked, ctx->copy_start, ctx->copy_end);
|
|
|
240
|
|
|
241 if (rc == NGX_ERROR) {
|
|
|
242 return rc;
|
|
|
243 }
|
|
|
244
|
|
|
245 if (ctx->copy_start != ctx->copy_end) {
|
|
|
246
|
|
|
247 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
248 "saved: %d", ctx->saved);
|
|
|
249
|
|
|
250 if (ctx->saved) {
|
|
|
251
|
|
|
252 if (ctx->free) {
|
|
|
253 cl = ctx->free;
|
|
|
254 ctx->free = ctx->free->next;
|
|
|
255 b = cl->buf;
|
|
|
256 ngx_memzero(b, sizeof(ngx_buf_t));
|
|
|
257
|
|
|
258 } else {
|
|
|
259 b = ngx_calloc_buf(r->pool);
|
|
|
260 if (b == NULL) {
|
|
|
261 return NGX_ERROR;
|
|
|
262 }
|
|
|
263
|
|
|
264 cl = ngx_alloc_chain_link(r->pool);
|
|
|
265 if (cl == NULL) {
|
|
|
266 return NGX_ERROR;
|
|
|
267 }
|
|
|
268
|
|
|
269 cl->buf = b;
|
|
|
270 }
|
|
|
271
|
|
|
272 b->memory = 1;
|
|
|
273 b->pos = ctx->match.data;
|
|
|
274 b->last = ctx->match.data + ctx->saved;
|
|
|
275
|
|
|
276 *ctx->last_out = cl;
|
|
|
277 ctx->last_out = &cl->next;
|
|
|
278
|
|
|
279 ctx->saved = 0;
|
|
|
280 }
|
|
|
281
|
|
|
282 if (ctx->free) {
|
|
|
283 cl = ctx->free;
|
|
|
284 ctx->free = ctx->free->next;
|
|
|
285 b = cl->buf;
|
|
|
286
|
|
|
287 } else {
|
|
|
288 b = ngx_alloc_buf(r->pool);
|
|
|
289 if (b == NULL) {
|
|
|
290 return NGX_ERROR;
|
|
|
291 }
|
|
|
292
|
|
|
293 cl = ngx_alloc_chain_link(r->pool);
|
|
|
294 if (cl == NULL) {
|
|
|
295 return NGX_ERROR;
|
|
|
296 }
|
|
|
297
|
|
|
298 cl->buf = b;
|
|
|
299 }
|
|
|
300
|
|
|
301 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t));
|
|
|
302
|
|
|
303 b->pos = ctx->copy_start;
|
|
|
304 b->last = ctx->copy_end;
|
|
|
305 b->shadow = NULL;
|
|
|
306 b->last_buf = 0;
|
|
|
307 b->recycled = 0;
|
|
|
308
|
|
|
309 if (b->in_file) {
|
|
386
|
310 b->file_last = b->file_pos + (b->last - ctx->buf->pos);
|
|
|
311 b->file_pos += b->pos - ctx->buf->pos;
|
|
296
|
312 }
|
|
|
313
|
|
|
314 cl->next = NULL;
|
|
|
315 *ctx->last_out = cl;
|
|
|
316 ctx->last_out = &cl->next;
|
|
|
317 }
|
|
|
318
|
|
|
319 if (ctx->state == sub_start_state) {
|
|
|
320 ctx->copy_start = ctx->pos;
|
|
|
321 ctx->copy_end = ctx->pos;
|
|
|
322
|
|
|
323 } else {
|
|
|
324 ctx->copy_start = NULL;
|
|
|
325 ctx->copy_end = NULL;
|
|
|
326 }
|
|
|
327
|
|
|
328 if (rc == NGX_AGAIN) {
|
|
|
329 continue;
|
|
|
330 }
|
|
|
331
|
|
|
332
|
|
|
333 /* rc == NGX_OK */
|
|
|
334
|
|
|
335 b = ngx_calloc_buf(r->pool);
|
|
|
336 if (b == NULL) {
|
|
|
337 return NGX_ERROR;
|
|
|
338 }
|
|
|
339
|
|
|
340 cl = ngx_alloc_chain_link(r->pool);
|
|
|
341 if (cl == NULL) {
|
|
|
342 return NGX_ERROR;
|
|
|
343 }
|
|
|
344
|
|
|
345 slcf = ngx_http_get_module_loc_conf(r, ngx_http_sub_filter_module);
|
|
|
346
|
|
|
347 if (ctx->sub.data == NULL) {
|
|
|
348
|
|
|
349 if (ngx_http_script_run(r, &ctx->sub, slcf->sub_lengths->elts,
|
|
|
350 0, slcf->sub_values->elts)
|
|
|
351 == NULL)
|
|
|
352 {
|
|
|
353 return NGX_ERROR;
|
|
|
354 }
|
|
|
355 }
|
|
|
356
|
|
340
|
357 if (ctx->sub.len) {
|
|
|
358 b->memory = 1;
|
|
|
359 b->pos = ctx->sub.data;
|
|
|
360 b->last = ctx->sub.data + ctx->sub.len;
|
|
|
361
|
|
|
362 } else {
|
|
|
363 b->sync = 1;
|
|
|
364 }
|
|
296
|
365
|
|
|
366 cl->buf = b;
|
|
|
367 cl->next = NULL;
|
|
|
368 *ctx->last_out = cl;
|
|
|
369 ctx->last_out = &cl->next;
|
|
|
370
|
|
|
371 ctx->once = slcf->once;
|
|
|
372
|
|
|
373 continue;
|
|
|
374 }
|
|
|
375
|
|
|
376 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) {
|
|
|
377 if (b == NULL) {
|
|
|
378 if (ctx->free) {
|
|
|
379 cl = ctx->free;
|
|
|
380 ctx->free = ctx->free->next;
|
|
|
381 b = cl->buf;
|
|
|
382 ngx_memzero(b, sizeof(ngx_buf_t));
|
|
|
383
|
|
|
384 } else {
|
|
|
385 b = ngx_calloc_buf(r->pool);
|
|
|
386 if (b == NULL) {
|
|
|
387 return NGX_ERROR;
|
|
|
388 }
|
|
|
389
|
|
|
390 cl = ngx_alloc_chain_link(r->pool);
|
|
|
391 if (cl == NULL) {
|
|
|
392 return NGX_ERROR;
|
|
|
393 }
|
|
|
394
|
|
|
395 cl->buf = b;
|
|
|
396 }
|
|
|
397
|
|
|
398 b->sync = 1;
|
|
|
399
|
|
|
400 cl->next = NULL;
|
|
|
401 *ctx->last_out = cl;
|
|
|
402 ctx->last_out = &cl->next;
|
|
|
403 }
|
|
|
404
|
|
|
405 b->last_buf = ctx->buf->last_buf;
|
|
|
406 b->shadow = ctx->buf;
|
|
|
407
|
|
|
408 b->recycled = ctx->buf->recycled;
|
|
|
409 }
|
|
|
410
|
|
|
411 ctx->buf = NULL;
|
|
|
412
|
|
|
413 ctx->saved = ctx->looked;
|
|
|
414 }
|
|
|
415
|
|
|
416 if (ctx->out == NULL && ctx->busy == NULL) {
|
|
|
417 return NGX_OK;
|
|
|
418 }
|
|
|
419
|
|
|
420 return ngx_http_sub_output(r, ctx);
|
|
|
421 }
|
|
|
422
|
|
|
423
|
|
|
424 static ngx_int_t
|
|
|
425 ngx_http_sub_output(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
|
|
|
426 {
|
|
|
427 ngx_int_t rc;
|
|
|
428 ngx_buf_t *b;
|
|
|
429 ngx_chain_t *cl;
|
|
|
430
|
|
|
431 #if 1
|
|
|
432 b = NULL;
|
|
|
433 for (cl = ctx->out; cl; cl = cl->next) {
|
|
|
434 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
435 "sub out: %p %p", cl->buf, cl->buf->pos);
|
|
|
436 if (cl->buf == b) {
|
|
|
437 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
|
|
|
438 "the same buf was used in sub");
|
|
|
439 ngx_debug_point();
|
|
|
440 return NGX_ERROR;
|
|
|
441 }
|
|
|
442 b = cl->buf;
|
|
|
443 }
|
|
|
444 #endif
|
|
|
445
|
|
|
446 rc = ngx_http_next_body_filter(r, ctx->out);
|
|
|
447
|
|
|
448 if (ctx->busy == NULL) {
|
|
|
449 ctx->busy = ctx->out;
|
|
|
450
|
|
|
451 } else {
|
|
|
452 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ }
|
|
|
453 cl->next = ctx->out;
|
|
|
454 }
|
|
|
455
|
|
|
456 ctx->out = NULL;
|
|
|
457 ctx->last_out = &ctx->out;
|
|
|
458
|
|
|
459 while (ctx->busy) {
|
|
|
460
|
|
|
461 cl = ctx->busy;
|
|
|
462 b = cl->buf;
|
|
|
463
|
|
|
464 if (ngx_buf_size(b) != 0) {
|
|
|
465 break;
|
|
|
466 }
|
|
|
467
|
|
|
468 if (b->shadow) {
|
|
|
469 b->shadow->pos = b->shadow->last;
|
|
|
470 }
|
|
|
471
|
|
|
472 ctx->busy = cl->next;
|
|
|
473
|
|
|
474 if (ngx_buf_in_memory(b) || b->in_file) {
|
|
|
475 /* add data bufs only to the free buf chain */
|
|
|
476
|
|
|
477 cl->next = ctx->free;
|
|
|
478 ctx->free = cl;
|
|
|
479 }
|
|
|
480 }
|
|
|
481
|
|
|
482 if (ctx->in || ctx->buf) {
|
|
|
483 r->buffered |= NGX_HTTP_SUB_BUFFERED;
|
|
|
484
|
|
|
485 } else {
|
|
|
486 r->buffered &= ~NGX_HTTP_SUB_BUFFERED;
|
|
|
487 }
|
|
|
488
|
|
|
489 return rc;
|
|
|
490 }
|
|
|
491
|
|
|
492
|
|
|
493 static ngx_int_t
|
|
|
494 ngx_http_sub_parse(ngx_http_request_t *r, ngx_http_sub_ctx_t *ctx)
|
|
|
495 {
|
|
|
496 u_char *p, *last, *copy_end, ch, match;
|
|
|
497 size_t looked;
|
|
|
498 ngx_http_sub_state_e state;
|
|
|
499
|
|
|
500 if (ctx->once) {
|
|
|
501 ctx->copy_start = ctx->pos;
|
|
|
502 ctx->copy_end = ctx->buf->last;
|
|
|
503 ctx->pos = ctx->buf->last;
|
|
|
504 ctx->looked = 0;
|
|
|
505
|
|
|
506 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "once");
|
|
|
507
|
|
|
508 return NGX_AGAIN;
|
|
|
509 }
|
|
|
510
|
|
|
511 state = ctx->state;
|
|
|
512 looked = ctx->looked;
|
|
|
513 last = ctx->buf->last;
|
|
|
514 copy_end = ctx->copy_end;
|
|
|
515
|
|
|
516 for (p = ctx->pos; p < last; p++) {
|
|
|
517
|
|
|
518 ch = *p;
|
|
|
519 ch = ngx_tolower(ch);
|
|
|
520
|
|
|
521 if (state == sub_start_state) {
|
|
|
522
|
|
|
523 /* the tight loop */
|
|
|
524
|
|
|
525 match = ctx->match.data[0];
|
|
|
526
|
|
|
527 for ( ;; ) {
|
|
|
528 if (ch == match) {
|
|
|
529 copy_end = p;
|
|
|
530 looked = 1;
|
|
|
531 state = sub_match_state;
|
|
|
532
|
|
|
533 goto match_started;
|
|
|
534 }
|
|
|
535
|
|
|
536 if (++p == last) {
|
|
|
537 break;
|
|
|
538 }
|
|
|
539
|
|
|
540 ch = *p;
|
|
|
541 ch = ngx_tolower(ch);
|
|
|
542 }
|
|
|
543
|
|
340
|
544 ctx->state = state;
|
|
296
|
545 ctx->pos = p;
|
|
|
546 ctx->looked = looked;
|
|
|
547 ctx->copy_end = p;
|
|
|
548
|
|
|
549 if (ctx->copy_start == NULL) {
|
|
|
550 ctx->copy_start = ctx->buf->pos;
|
|
|
551 }
|
|
|
552
|
|
|
553 return NGX_AGAIN;
|
|
|
554
|
|
|
555 match_started:
|
|
|
556
|
|
|
557 continue;
|
|
|
558 }
|
|
|
559
|
|
|
560 /* state == sub_match_state */
|
|
|
561
|
|
|
562 if (ch == ctx->match.data[looked]) {
|
|
|
563 looked++;
|
|
|
564
|
|
|
565 if (looked == ctx->match.len) {
|
|
340
|
566 if ((size_t) (p - ctx->pos) < looked) {
|
|
|
567 ctx->saved = 0;
|
|
|
568 }
|
|
|
569
|
|
296
|
570 ctx->state = sub_start_state;
|
|
|
571 ctx->pos = p + 1;
|
|
372
|
572 ctx->looked = 0;
|
|
296
|
573 ctx->copy_end = copy_end;
|
|
|
574
|
|
|
575 if (ctx->copy_start == NULL && copy_end) {
|
|
|
576 ctx->copy_start = ctx->buf->pos;
|
|
|
577 }
|
|
|
578
|
|
|
579 return NGX_OK;
|
|
|
580 }
|
|
|
581
|
|
|
582 } else if (ch == ctx->match.data[0]) {
|
|
|
583 copy_end = p;
|
|
|
584 looked = 1;
|
|
|
585
|
|
|
586 } else {
|
|
|
587 copy_end = p;
|
|
|
588 looked = 0;
|
|
|
589 state = sub_start_state;
|
|
|
590 }
|
|
|
591 }
|
|
|
592
|
|
|
593 ctx->state = state;
|
|
|
594 ctx->pos = p;
|
|
|
595 ctx->looked = looked;
|
|
|
596
|
|
|
597 ctx->copy_end = (state == sub_start_state) ? p : copy_end;
|
|
|
598
|
|
|
599 if (ctx->copy_start == NULL && ctx->copy_end) {
|
|
|
600 ctx->copy_start = ctx->buf->pos;
|
|
|
601 }
|
|
|
602
|
|
|
603 return NGX_AGAIN;
|
|
|
604 }
|
|
|
605
|
|
|
606
|
|
|
607 static char *
|
|
|
608 ngx_http_sub_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
609 {
|
|
|
610 ngx_http_sub_loc_conf_t *slcf = conf;
|
|
|
611
|
|
|
612 ngx_str_t *value;
|
|
|
613 ngx_int_t n;
|
|
|
614 ngx_http_script_compile_t sc;
|
|
|
615
|
|
|
616 if (slcf->match.len) {
|
|
|
617 return "is duplicate";
|
|
|
618 }
|
|
|
619
|
|
|
620 value = cf->args->elts;
|
|
|
621
|
|
392
|
622 ngx_strlow(value[1].data, value[1].data, value[1].len);
|
|
296
|
623
|
|
392
|
624 slcf->match = value[1];
|
|
296
|
625
|
|
|
626 n = ngx_http_script_variables_count(&value[2]);
|
|
|
627
|
|
|
628 if (n == 0) {
|
|
|
629 slcf->sub = value[2];
|
|
|
630 return NGX_CONF_OK;
|
|
|
631 }
|
|
|
632
|
|
|
633 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
|
|
|
634
|
|
|
635 sc.cf = cf;
|
|
|
636 sc.source = &value[2];
|
|
|
637 sc.lengths = &slcf->sub_lengths;
|
|
|
638 sc.values = &slcf->sub_values;
|
|
|
639 sc.variables = n;
|
|
|
640 sc.complete_lengths = 1;
|
|
|
641 sc.complete_values = 1;
|
|
|
642
|
|
|
643 if (ngx_http_script_compile(&sc) != NGX_OK) {
|
|
|
644 return NGX_CONF_ERROR;
|
|
|
645 }
|
|
|
646
|
|
|
647 return NGX_CONF_OK;
|
|
|
648 }
|
|
|
649
|
|
|
650
|
|
|
651 static void *
|
|
|
652 ngx_http_sub_create_conf(ngx_conf_t *cf)
|
|
|
653 {
|
|
|
654 ngx_http_sub_loc_conf_t *slcf;
|
|
|
655
|
|
|
656 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_sub_loc_conf_t));
|
|
|
657 if (slcf == NULL) {
|
|
|
658 return NGX_CONF_ERROR;
|
|
|
659 }
|
|
|
660
|
|
|
661 /*
|
|
|
662 * set by ngx_pcalloc():
|
|
|
663 *
|
|
394
|
664 * conf->match = { 0, NULL };
|
|
|
665 * conf->sub = { 0, NULL };
|
|
296
|
666 * conf->sub_lengths = NULL;
|
|
|
667 * conf->sub_values = NULL;
|
|
394
|
668 * conf->types = { NULL };
|
|
|
669 * conf->types_keys = NULL;
|
|
296
|
670 */
|
|
|
671
|
|
|
672 slcf->once = NGX_CONF_UNSET;
|
|
|
673
|
|
|
674 return slcf;
|
|
|
675 }
|
|
|
676
|
|
|
677
|
|
|
678 static char *
|
|
|
679 ngx_http_sub_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
680 {
|
|
|
681 ngx_http_sub_loc_conf_t *prev = parent;
|
|
|
682 ngx_http_sub_loc_conf_t *conf = child;
|
|
|
683
|
|
|
684 ngx_conf_merge_value(conf->once, prev->once, 1);
|
|
|
685 ngx_conf_merge_str_value(conf->match, prev->match, "");
|
|
|
686
|
|
|
687 if (conf->sub.data == NULL && conf->sub_lengths == NULL) {
|
|
|
688 conf->sub = prev->sub;
|
|
|
689 conf->sub_lengths = prev->sub_lengths;
|
|
|
690 conf->sub_values = prev->sub_values;
|
|
|
691 }
|
|
|
692
|
|
394
|
693 if (ngx_http_merge_types(cf, conf->types_keys, &conf->types,
|
|
|
694 prev->types_keys, &prev->types,
|
|
|
695 ngx_http_html_default_types)
|
|
|
696 != NGX_OK)
|
|
|
697 {
|
|
|
698 return NGX_CONF_ERROR;
|
|
296
|
699 }
|
|
|
700
|
|
|
701 return NGX_CONF_OK;
|
|
|
702 }
|
|
|
703
|
|
|
704
|
|
|
705 static ngx_int_t
|
|
|
706 ngx_http_sub_filter_init(ngx_conf_t *cf)
|
|
|
707 {
|
|
|
708 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
709 ngx_http_top_header_filter = ngx_http_sub_header_filter;
|
|
|
710
|
|
|
711 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
712 ngx_http_top_body_filter = ngx_http_sub_body_filter;
|
|
|
713
|
|
|
714 return NGX_OK;
|
|
|
715 }
|
