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Merge commit 'v0.8.40'
[nginx-catap.git] / src / http / modules / ngx_http_rewrite_module.c
blobd6099ccc37cdf15aaa473744207e851f03e1b55c
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_array_t *codes; /* uintptr_t */
14
15 ngx_uint_t stack_size;
16
17 ngx_flag_t log;
18 ngx_flag_t uninitialized_variable_warn;
19 } ngx_http_rewrite_loc_conf_t;
20
21
22 static void *ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf);
23 static char *ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf,
24 void *parent, void *child);
25 static ngx_int_t ngx_http_rewrite_init(ngx_conf_t *cf);
26 static char *ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
27 static char *ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd,
28 void *conf);
29 static char *ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd,
30 void *conf);
31 static char *ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd,
32 void *conf);
33 static char * ngx_http_rewrite_if_condition(ngx_conf_t *cf,
34 ngx_http_rewrite_loc_conf_t *lcf);
35 static char *ngx_http_rewrite_variable(ngx_conf_t *cf,
36 ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value);
37 static char *ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd,
38 void *conf);
39 static char * ngx_http_rewrite_value(ngx_conf_t *cf,
40 ngx_http_rewrite_loc_conf_t *lcf, ngx_str_t *value);
41
42
43 static ngx_command_t ngx_http_rewrite_commands[] = {
44
45 { ngx_string("rewrite"),
46 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
47 |NGX_CONF_TAKE23,
48 ngx_http_rewrite,
49 NGX_HTTP_LOC_CONF_OFFSET,
50 0,
51 NULL },
52
53 { ngx_string("return"),
54 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
55 |NGX_CONF_TAKE1,
56 ngx_http_rewrite_return,
57 NGX_HTTP_LOC_CONF_OFFSET,
58 0,
59 NULL },
60
61 { ngx_string("break"),
62 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
63 |NGX_CONF_NOARGS,
64 ngx_http_rewrite_break,
65 NGX_HTTP_LOC_CONF_OFFSET,
66 0,
67 NULL },
68
69 { ngx_string("if"),
70 NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_BLOCK|NGX_CONF_1MORE,
71 ngx_http_rewrite_if,
72 NGX_HTTP_LOC_CONF_OFFSET,
73 0,
74 NULL },
75
76 { ngx_string("set"),
77 NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
78 |NGX_CONF_TAKE2,
79 ngx_http_rewrite_set,
80 NGX_HTTP_LOC_CONF_OFFSET,
81 0,
82 NULL },
83
84 { ngx_string("rewrite_log"),
85 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF
86 |NGX_HTTP_LIF_CONF|NGX_CONF_FLAG,
87 ngx_conf_set_flag_slot,
88 NGX_HTTP_LOC_CONF_OFFSET,
89 offsetof(ngx_http_rewrite_loc_conf_t, log),
90 NULL },
91
92 { ngx_string("uninitialized_variable_warn"),
93 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF
94 |NGX_HTTP_LIF_CONF|NGX_CONF_FLAG,
95 ngx_conf_set_flag_slot,
96 NGX_HTTP_LOC_CONF_OFFSET,
97 offsetof(ngx_http_rewrite_loc_conf_t, uninitialized_variable_warn),
98 NULL },
99
100 ngx_null_command
101 };
102
103
104 static ngx_http_module_t ngx_http_rewrite_module_ctx = {
105 NULL, /* preconfiguration */
106 ngx_http_rewrite_init, /* postconfiguration */
107
108 NULL, /* create main configuration */
109 NULL, /* init main configuration */
110
111 NULL, /* create server configuration */
112 NULL, /* merge server configuration */
113
114 ngx_http_rewrite_create_loc_conf, /* create location configration */
115 ngx_http_rewrite_merge_loc_conf /* merge location configration */
116 };
117
118
119 ngx_module_t ngx_http_rewrite_module = {
120 NGX_MODULE_V1,
121 &ngx_http_rewrite_module_ctx, /* module context */
122 ngx_http_rewrite_commands, /* module directives */
123 NGX_HTTP_MODULE, /* module type */
124 NULL, /* init master */
125 NULL, /* init module */
126 NULL, /* init process */
127 NULL, /* init thread */
128 NULL, /* exit thread */
129 NULL, /* exit process */
130 NULL, /* exit master */
131 NGX_MODULE_V1_PADDING
132 };
133
134
135 static ngx_int_t
136 ngx_http_rewrite_handler(ngx_http_request_t *r)
137 {
138 ngx_http_script_code_pt code;
139 ngx_http_script_engine_t *e;
140 ngx_http_rewrite_loc_conf_t *rlcf;
141
142 rlcf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
143
144 if (rlcf->codes == NULL) {
145 return NGX_DECLINED;
146 }
147
148 e = ngx_pcalloc(r->pool, sizeof(ngx_http_script_engine_t));
149 if (e == NULL) {
150 return NGX_HTTP_INTERNAL_SERVER_ERROR;
151 }
152
153 e->sp = ngx_pcalloc(r->pool,
154 rlcf->stack_size * sizeof(ngx_http_variable_value_t));
155 if (e->sp == NULL) {
156 return NGX_HTTP_INTERNAL_SERVER_ERROR;
157 }
158
159 e->ip = rlcf->codes->elts;
160 e->request = r;
161 e->quote = 1;
162 e->log = rlcf->log;
163 e->status = NGX_DECLINED;
164
165 while (*(uintptr_t *) e->ip) {
166 code = *(ngx_http_script_code_pt *) e->ip;
167 code(e);
168 }
169
170 if (e->status == NGX_DECLINED) {
171 return NGX_DECLINED;
172 }
173
174 if (r->err_status == 0) {
175 return e->status;
176 }
177
178 return r->err_status;
179 }
180
181
182 static ngx_int_t
183 ngx_http_rewrite_var(ngx_http_request_t *r, ngx_http_variable_value_t *v,
184 uintptr_t data)
185 {
186 ngx_http_variable_t *var;
187 ngx_http_core_main_conf_t *cmcf;
188 ngx_http_rewrite_loc_conf_t *rlcf;
189
190 rlcf = ngx_http_get_module_loc_conf(r, ngx_http_rewrite_module);
191
192 if (rlcf->uninitialized_variable_warn == 0) {
193 *v = ngx_http_variable_null_value;
194 return NGX_OK;
195 }
196
197 cmcf = ngx_http_get_module_main_conf(r, ngx_http_core_module);
198
199 var = cmcf->variables.elts;
200
201 /*
202 * the ngx_http_rewrite_module sets variables directly in r->variables,
203 * and they should be handled by ngx_http_get_indexed_variable(),
204 * so the handler is called only if the variable is not initialized
205 */
206
207 ngx_log_error(NGX_LOG_WARN, r->connection->log, 0,
208 "using uninitialized \"%V\" variable", &var[data].name);
209
210 *v = ngx_http_variable_null_value;
211
212 return NGX_OK;
213 }
214
215
216 static void *
217 ngx_http_rewrite_create_loc_conf(ngx_conf_t *cf)
218 {
219 ngx_http_rewrite_loc_conf_t *conf;
220
221 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_rewrite_loc_conf_t));
222 if (conf == NULL) {
223 return NULL;
224 }
225
226 conf->stack_size = NGX_CONF_UNSET_UINT;
227 conf->log = NGX_CONF_UNSET;
228 conf->uninitialized_variable_warn = NGX_CONF_UNSET;
229
230 return conf;
231 }
232
233
234 static char *
235 ngx_http_rewrite_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
236 {
237 ngx_http_rewrite_loc_conf_t *prev = parent;
238 ngx_http_rewrite_loc_conf_t *conf = child;
239
240 uintptr_t *code;
241
242 ngx_conf_merge_value(conf->log, prev->log, 0);
243 ngx_conf_merge_value(conf->uninitialized_variable_warn,
244 prev->uninitialized_variable_warn, 1);
245 ngx_conf_merge_uint_value(conf->stack_size, prev->stack_size, 10);
246
247 if (conf->codes == NULL) {
248 return NGX_CONF_OK;
249 }
250
251 if (conf->codes == prev->codes) {
252 return NGX_CONF_OK;
253 }
254
255 code = ngx_array_push_n(conf->codes, sizeof(uintptr_t));
256 if (code == NULL) {
257 return NGX_CONF_ERROR;
258 }
259
260 *code = (uintptr_t) NULL;
261
262 return NGX_CONF_OK;
263 }
264
265
266 static ngx_int_t
267 ngx_http_rewrite_init(ngx_conf_t *cf)
268 {
269 ngx_http_handler_pt *h;
270 ngx_http_core_main_conf_t *cmcf;
271
272 cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
273
274 h = ngx_array_push(&cmcf->phases[NGX_HTTP_SERVER_REWRITE_PHASE].handlers);
275 if (h == NULL) {
276 return NGX_ERROR;
277 }
278
279 *h = ngx_http_rewrite_handler;
280
281 h = ngx_array_push(&cmcf->phases[NGX_HTTP_REWRITE_PHASE].handlers);
282 if (h == NULL) {
283 return NGX_ERROR;
284 }
285
286 *h = ngx_http_rewrite_handler;
287
288 return NGX_OK;
289 }
290
291
292 static char *
293 ngx_http_rewrite(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
294 {
295 ngx_http_rewrite_loc_conf_t *lcf = conf;
296
297 ngx_str_t *value;
298 ngx_uint_t last;
299 ngx_regex_compile_t rc;
300 ngx_http_script_code_pt *code;
301 ngx_http_script_compile_t sc;
302 ngx_http_script_regex_code_t *regex;
303 ngx_http_script_regex_end_code_t *regex_end;
304 u_char errstr[NGX_MAX_CONF_ERRSTR];
305
306 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
307 sizeof(ngx_http_script_regex_code_t));
308 if (regex == NULL) {
309 return NGX_CONF_ERROR;
310 }
311
312 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
313
314 value = cf->args->elts;
315
316 ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
317
318 rc.pattern = value[1];
319 rc.err.len = NGX_MAX_CONF_ERRSTR;
320 rc.err.data = errstr;
321
322 /* TODO: NGX_REGEX_CASELESS */
323
324 regex->regex = ngx_http_regex_compile(cf, &rc);
325 if (regex->regex == NULL) {
326 return NGX_CONF_ERROR;
327 }
328
329 regex->code = ngx_http_script_regex_start_code;
330 regex->uri = 1;
331 regex->name = value[1];
332
333 if (value[2].data[value[2].len - 1] == '?') {
334
335 /* the last "?" drops the original arguments */
336 value[2].len--;
337
338 } else {
339 regex->add_args = 1;
340 }
341
342 last = 0;
343
344 if (ngx_strncmp(value[2].data, "http://", sizeof("http://") - 1) == 0
345 || ngx_strncmp(value[2].data, "https://", sizeof("https://") - 1) == 0
346 || ngx_strncmp(value[2].data, "$scheme", sizeof("$scheme") - 1) == 0)
347 {
348 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
349 regex->redirect = 1;
350 last = 1;
351 }
352
353 if (value[2].data[0] == '@') {
354 regex->named_redirect = 1;
355 last = 1;
356 }
357
358 if (cf->args->nelts == 4) {
359 if (ngx_strcmp(value[3].data, "last") == 0) {
360 last = 1;
361
362 } else if (ngx_strcmp(value[3].data, "break") == 0) {
363 regex->break_cycle = 1;
364 last = 1;
365
366 } else if (ngx_strcmp(value[3].data, "redirect") == 0) {
367 regex->status = NGX_HTTP_MOVED_TEMPORARILY;
368 regex->redirect = 1;
369 last = 1;
370
371 } else if (ngx_strcmp(value[3].data, "permanent") == 0) {
372 regex->status = NGX_HTTP_MOVED_PERMANENTLY;
373 regex->redirect = 1;
374 last = 1;
375
376 } else {
377 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
378 "invalid parameter \"%V\"", &value[3]);
379 return NGX_CONF_ERROR;
380 }
381 }
382
383 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
384
385 sc.cf = cf;
386 sc.source = &value[2];
387 sc.lengths = &regex->lengths;
388 sc.values = &lcf->codes;
389 sc.variables = ngx_http_script_variables_count(&value[2]);
390 sc.main = regex;
391 sc.complete_lengths = 1;
392 sc.compile_args = !regex->redirect;
393
394 if (ngx_http_script_compile(&sc) != NGX_OK) {
395 return NGX_CONF_ERROR;
396 }
397
398 regex = sc.main;
399
400 regex->size = sc.size;
401 regex->args = sc.args;
402
403 if (sc.variables == 0 && !sc.dup_capture) {
404 regex->lengths = NULL;
405 }
406
407 regex_end = ngx_http_script_add_code(lcf->codes,
408 sizeof(ngx_http_script_regex_end_code_t),
409 &regex);
410 if (regex_end == NULL) {
411 return NGX_CONF_ERROR;
412 }
413
414 regex_end->code = ngx_http_script_regex_end_code;
415 regex_end->uri = regex->uri;
416 regex_end->args = regex->args;
417 regex_end->add_args = regex->add_args;
418 regex_end->redirect = regex->redirect;
419 regex_end->named_redirect = regex->named_redirect;
420
421 if (last) {
422 code = ngx_http_script_add_code(lcf->codes, sizeof(uintptr_t), &regex);
423 if (code == NULL) {
424 return NGX_CONF_ERROR;
425 }
426
427 *code = NULL;
428 }
429
430 regex->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
431 - (u_char *) regex;
432
433 return NGX_CONF_OK;
434 }
435
436
437 static char *
438 ngx_http_rewrite_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
439 {
440 ngx_http_rewrite_loc_conf_t *lcf = conf;
441
442 ngx_str_t *value;
443 ngx_http_script_return_code_t *ret;
444
445 ret = ngx_http_script_start_code(cf->pool, &lcf->codes,
446 sizeof(ngx_http_script_return_code_t));
447 if (ret == NULL) {
448 return NGX_CONF_ERROR;
449 }
450
451 value = cf->args->elts;
452
453 ret->code = ngx_http_script_return_code;
454 ret->null = (uintptr_t) NULL;
455
456 ret->status = ngx_atoi(value[1].data, value[1].len);
457
458 if (ret->status == (uintptr_t) NGX_ERROR) {
459 return NGX_CONF_ERROR;
460 }
461
462 return NGX_CONF_OK;
463 }
464
465
466 static char *
467 ngx_http_rewrite_break(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
468 {
469 ngx_http_rewrite_loc_conf_t *lcf = conf;
470
471 ngx_http_script_code_pt *code;
472
473 code = ngx_http_script_start_code(cf->pool, &lcf->codes, sizeof(uintptr_t));
474 if (code == NULL) {
475 return NGX_CONF_ERROR;
476 }
477
478 *code = ngx_http_script_break_code;
479
480 return NGX_CONF_OK;
481 }
482
483
484 static char *
485 ngx_http_rewrite_if(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
486 {
487 ngx_http_rewrite_loc_conf_t *lcf = conf;
488
489 void *mconf;
490 char *rv;
491 u_char *elts;
492 ngx_uint_t i;
493 ngx_conf_t save;
494 ngx_http_module_t *module;
495 ngx_http_conf_ctx_t *ctx, *pctx;
496 ngx_http_core_loc_conf_t *clcf, *pclcf;
497 ngx_http_script_if_code_t *if_code;
498 ngx_http_rewrite_loc_conf_t *nlcf;
499
500 ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_conf_ctx_t));
501 if (ctx == NULL) {
502 return NGX_CONF_ERROR;
503 }
504
505 pctx = cf->ctx;
506 ctx->main_conf = pctx->main_conf;
507 ctx->srv_conf = pctx->srv_conf;
508
509 ctx->loc_conf = ngx_pcalloc(cf->pool, sizeof(void *) * ngx_http_max_module);
510 if (ctx->loc_conf == NULL) {
511 return NGX_CONF_ERROR;
512 }
513
514 for (i = 0; ngx_modules[i]; i++) {
515 if (ngx_modules[i]->type != NGX_HTTP_MODULE) {
516 continue;
517 }
518
519 module = ngx_modules[i]->ctx;
520
521 if (module->create_loc_conf) {
522
523 mconf = module->create_loc_conf(cf);
524 if (mconf == NULL) {
525 return NGX_CONF_ERROR;
526 }
527
528 ctx->loc_conf[ngx_modules[i]->ctx_index] = mconf;
529 }
530 }
531
532 pclcf = pctx->loc_conf[ngx_http_core_module.ctx_index];
533
534 clcf = ctx->loc_conf[ngx_http_core_module.ctx_index];
535 clcf->loc_conf = ctx->loc_conf;
536 clcf->name = pclcf->name;
537 clcf->noname = 1;
538
539 if (ngx_http_add_location(cf, &pclcf->locations, clcf) != NGX_OK) {
540 return NGX_CONF_ERROR;
541 }
542
543 if (ngx_http_rewrite_if_condition(cf, lcf) != NGX_CONF_OK) {
544 return NGX_CONF_ERROR;
545 }
546
547 if_code = ngx_array_push_n(lcf->codes, sizeof(ngx_http_script_if_code_t));
548 if (if_code == NULL) {
549 return NGX_CONF_ERROR;
550 }
551
552 if_code->code = ngx_http_script_if_code;
553
554 elts = lcf->codes->elts;
555
556
557 /* the inner directives must be compiled to the same code array */
558
559 nlcf = ctx->loc_conf[ngx_http_rewrite_module.ctx_index];
560 nlcf->codes = lcf->codes;
561
562
563 save = *cf;
564 cf->ctx = ctx;
565
566 if (pclcf->name.len == 0) {
567 if_code->loc_conf = NULL;
568 cf->cmd_type = NGX_HTTP_SIF_CONF;
569
570 } else {
571 if_code->loc_conf = ctx->loc_conf;
572 cf->cmd_type = NGX_HTTP_LIF_CONF;
573 }
574
575 rv = ngx_conf_parse(cf, NULL);
576
577 *cf = save;
578
579 if (rv != NGX_CONF_OK) {
580 return rv;
581 }
582
583
584 if (elts != lcf->codes->elts) {
585 if_code = (ngx_http_script_if_code_t *)
586 ((u_char *) if_code + ((u_char *) lcf->codes->elts - elts));
587 }
588
589 if_code->next = (u_char *) lcf->codes->elts + lcf->codes->nelts
590 - (u_char *) if_code;
591
592 /* the code array belong to parent block */
593
594 nlcf->codes = NULL;
595
596 return NGX_CONF_OK;
597 }
598
599
600 static char *
601 ngx_http_rewrite_if_condition(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf)
602 {
603 u_char *p;
604 size_t len;
605 ngx_str_t *value;
606 ngx_uint_t cur, last;
607 ngx_regex_compile_t rc;
608 ngx_http_script_code_pt *code;
609 ngx_http_script_file_code_t *fop;
610 ngx_http_script_regex_code_t *regex;
611 u_char errstr[NGX_MAX_CONF_ERRSTR];
612
613 value = cf->args->elts;
614 last = cf->args->nelts - 1;
615
616 if (value[1].len < 1 || value[1].data[0] != '(') {
617 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
618 "invalid condition \"%V\"", &value[1]);
619 return NGX_CONF_ERROR;
620 }
621
622 if (value[1].len == 1) {
623 cur = 2;
624
625 } else {
626 cur = 1;
627 value[1].len--;
628 value[1].data++;
629 }
630
631 if (value[last].len < 1 || value[last].data[value[last].len - 1] != ')') {
632 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
633 "invalid condition \"%V\"", &value[last]);
634 return NGX_CONF_ERROR;
635 }
636
637 if (value[last].len == 1) {
638 last--;
639
640 } else {
641 value[last].len--;
642 value[last].data[value[last].len] = '\0';
643 }
644
645 len = value[cur].len;
646 p = value[cur].data;
647
648 if (len > 1 && p[0] == '$') {
649
650 if (cur != last && cur + 2 != last) {
651 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
652 "invalid condition \"%V\"", &value[cur]);
653 return NGX_CONF_ERROR;
654 }
655
656 if (ngx_http_rewrite_variable(cf, lcf, &value[cur]) != NGX_CONF_OK) {
657 return NGX_CONF_ERROR;
658 }
659
660 if (cur == last) {
661 return NGX_CONF_OK;
662 }
663
664 cur++;
665
666 len = value[cur].len;
667 p = value[cur].data;
668
669 if (len == 1 && p[0] == '=') {
670
671 if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
672 return NGX_CONF_ERROR;
673 }
674
675 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
676 sizeof(uintptr_t));
677 if (code == NULL) {
678 return NGX_CONF_ERROR;
679 }
680
681 *code = ngx_http_script_equal_code;
682
683 return NGX_CONF_OK;
684 }
685
686 if (len == 2 && p[0] == '!' && p[1] == '=') {
687
688 if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
689 return NGX_CONF_ERROR;
690 }
691
692 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
693 sizeof(uintptr_t));
694 if (code == NULL) {
695 return NGX_CONF_ERROR;
696 }
697
698 *code = ngx_http_script_not_equal_code;
699 return NGX_CONF_OK;
700 }
701
702 if (len == 1 && p[0] == '>') {
703
704 if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
705 return NGX_CONF_ERROR;
706 }
707
708 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
709 sizeof(uintptr_t));
710 if (code == NULL) {
711 return NGX_CONF_ERROR;
712 }
713
714 *code = ngx_http_script_more_code;
715
716 return NGX_CONF_OK;
717 }
718
719 if (len == 2 && p[0] == '!' && p[1] == '>') {
720
721 if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
722 return NGX_CONF_ERROR;
723 }
724
725 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
726 sizeof(uintptr_t));
727 if (code == NULL) {
728 return NGX_CONF_ERROR;
729 }
730
731 *code = ngx_http_script_not_more_code;
732 return NGX_CONF_OK;
733 }
734
735 if (len == 1 && p[0] == '<') {
736
737 if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
738 return NGX_CONF_ERROR;
739 }
740
741 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
742 sizeof(uintptr_t));
743 if (code == NULL) {
744 return NGX_CONF_ERROR;
745 }
746
747 *code = ngx_http_script_less_code;
748
749 return NGX_CONF_OK;
750 }
751
752 if (len == 2 && p[0] == '!' && p[1] == '<') {
753
754 if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
755 return NGX_CONF_ERROR;
756 }
757
758 code = ngx_http_script_start_code(cf->pool, &lcf->codes,
759 sizeof(uintptr_t));
760 if (code == NULL) {
761 return NGX_CONF_ERROR;
762 }
763
764 *code = ngx_http_script_not_less_code;
765 return NGX_CONF_OK;
766 }
767
768 if ((len == 1 && p[0] == '~')
769 || (len == 2 && p[0] == '~' && p[1] == '*')
770 || (len == 2 && p[0] == '!' && p[1] == '~')
771 || (len == 3 && p[0] == '!' && p[1] == '~' && p[2] == '*'))
772 {
773 regex = ngx_http_script_start_code(cf->pool, &lcf->codes,
774 sizeof(ngx_http_script_regex_code_t));
775 if (regex == NULL) {
776 return NGX_CONF_ERROR;
777 }
778
779 ngx_memzero(regex, sizeof(ngx_http_script_regex_code_t));
780
781 ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
782
783 rc.pattern = value[last];
784 rc.options = (p[len - 1] == '*') ? NGX_REGEX_CASELESS : 0;
785 rc.err.len = NGX_MAX_CONF_ERRSTR;
786 rc.err.data = errstr;
787
788 regex->regex = ngx_http_regex_compile(cf, &rc);
789 if (regex->regex == NULL) {
790 return NGX_CONF_ERROR;
791 }
792
793 regex->code = ngx_http_script_regex_start_code;
794 regex->next = sizeof(ngx_http_script_regex_code_t);
795 regex->test = 1;
796 if (p[0] == '!') {
797 regex->negative_test = 1;
798 }
799 regex->name = value[last];
800
801 return NGX_CONF_OK;
802 }
803
804 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
805 "unexpected \"%V\" in condition", &value[cur]);
806 return NGX_CONF_ERROR;
807
808 } else if ((len == 2 && p[0] == '-')
809 || (len == 3 && p[0] == '!' && p[1] == '-'))
810 {
811 if (cur + 1 != last) {
812 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
813 "invalid condition \"%V\"", &value[cur]);
814 return NGX_CONF_ERROR;
815 }
816
817 value[last].data[value[last].len] = '\0';
818 value[last].len++;
819
820 if (ngx_http_rewrite_value(cf, lcf, &value[last]) != NGX_CONF_OK) {
821 return NGX_CONF_ERROR;
822 }
823
824 fop = ngx_http_script_start_code(cf->pool, &lcf->codes,
825 sizeof(ngx_http_script_file_code_t));
826 if (fop == NULL) {
827 return NGX_CONF_ERROR;
828 }
829
830 fop->code = ngx_http_script_file_code;
831
832 if (p[1] == 'f') {
833 fop->op = ngx_http_script_file_plain;
834 return NGX_CONF_OK;
835 }
836
837 if (p[1] == 'd') {
838 fop->op = ngx_http_script_file_dir;
839 return NGX_CONF_OK;
840 }
841
842 if (p[1] == 'e') {
843 fop->op = ngx_http_script_file_exists;
844 return NGX_CONF_OK;
845 }
846
847 if (p[1] == 'x') {
848 fop->op = ngx_http_script_file_exec;
849 return NGX_CONF_OK;
850 }
851
852 if (p[0] == '!') {
853 if (p[2] == 'f') {
854 fop->op = ngx_http_script_file_not_plain;
855 return NGX_CONF_OK;
856 }
857
858 if (p[2] == 'd') {
859 fop->op = ngx_http_script_file_not_dir;
860 return NGX_CONF_OK;
861 }
862
863 if (p[2] == 'e') {
864 fop->op = ngx_http_script_file_not_exists;
865 return NGX_CONF_OK;
866 }
867
868 if (p[2] == 'x') {
869 fop->op = ngx_http_script_file_not_exec;
870 return NGX_CONF_OK;
871 }
872 }
873
874 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
875 "invalid condition \"%V\"", &value[cur]);
876 return NGX_CONF_ERROR;
877 }
878
879 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
880 "invalid condition \"%V\"", &value[cur]);
881
882 return NGX_CONF_ERROR;
883 }
884
885
886 static char *
887 ngx_http_rewrite_variable(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf,
888 ngx_str_t *value)
889 {
890 ngx_int_t index;
891 ngx_http_script_var_code_t *var_code;
892
893 value->len--;
894 value->data++;
895
896 index = ngx_http_get_variable_index(cf, value);
897
898 if (index == NGX_ERROR) {
899 return NGX_CONF_ERROR;
900 }
901
902 var_code = ngx_http_script_start_code(cf->pool, &lcf->codes,
903 sizeof(ngx_http_script_var_code_t));
904 if (var_code == NULL) {
905 return NGX_CONF_ERROR;
906 }
907
908 var_code->code = ngx_http_script_var_code;
909 var_code->index = index;
910
911 return NGX_CONF_OK;
912 }
913
914
915 static char *
916 ngx_http_rewrite_set(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
917 {
918 ngx_http_rewrite_loc_conf_t *lcf = conf;
919
920 ngx_int_t index;
921 ngx_str_t *value;
922 ngx_http_variable_t *v;
923 ngx_http_script_var_code_t *vcode;
924 ngx_http_script_var_handler_code_t *vhcode;
925
926 value = cf->args->elts;
927
928 if (value[1].data[0] != '$') {
929 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
930 "invalid variable name \"%V\"", &value[1]);
931 return NGX_CONF_ERROR;
932 }
933
934 value[1].len--;
935 value[1].data++;
936
937 v = ngx_http_add_variable(cf, &value[1], NGX_HTTP_VAR_CHANGEABLE);
938 if (v == NULL) {
939 return NGX_CONF_ERROR;
940 }
941
942 index = ngx_http_get_variable_index(cf, &value[1]);
943 if (index == NGX_ERROR) {
944 return NGX_CONF_ERROR;
945 }
946
947 if (v->get_handler == NULL
948 && ngx_strncasecmp(value[1].data, (u_char *) "http_", 5) != 0
949 && ngx_strncasecmp(value[1].data, (u_char *) "sent_http_", 10) != 0
950 && ngx_strncasecmp(value[1].data, (u_char *) "upstream_http_", 14) != 0)
951 {
952 v->get_handler = ngx_http_rewrite_var;
953 v->data = index;
954 }
955
956 if (ngx_http_rewrite_value(cf, lcf, &value[2]) != NGX_CONF_OK) {
957 return NGX_CONF_ERROR;
958 }
959
960 if (v->set_handler) {
961 vhcode = ngx_http_script_start_code(cf->pool, &lcf->codes,
962 sizeof(ngx_http_script_var_handler_code_t));
963 if (vhcode == NULL) {
964 return NGX_CONF_ERROR;
965 }
966
967 vhcode->code = ngx_http_script_var_set_handler_code;
968 vhcode->handler = v->set_handler;
969 vhcode->data = v->data;
970
971 return NGX_CONF_OK;
972 }
973
974 vcode = ngx_http_script_start_code(cf->pool, &lcf->codes,
975 sizeof(ngx_http_script_var_code_t));
976 if (vcode == NULL) {
977 return NGX_CONF_ERROR;
978 }
979
980 vcode->code = ngx_http_script_set_var_code;
981 vcode->index = (uintptr_t) index;
982
983 return NGX_CONF_OK;
984 }
985
986
987 static char *
988 ngx_http_rewrite_value(ngx_conf_t *cf, ngx_http_rewrite_loc_conf_t *lcf,
989 ngx_str_t *value)
990 {
991 ngx_int_t n;
992 ngx_http_script_compile_t sc;
993 ngx_http_script_value_code_t *val;
994 ngx_http_script_complex_value_code_t *complex;
995
996 n = ngx_http_script_variables_count(value);
997
998 if (n == 0) {
999 val = ngx_http_script_start_code(cf->pool, &lcf->codes,
1000 sizeof(ngx_http_script_value_code_t));
1001 if (val == NULL) {
1002 return NGX_CONF_ERROR;
1003 }
1004
1005 n = ngx_atoi(value->data, value->len);
1006
1007 if (n == NGX_ERROR) {
1008 n = 0;
1009 }
1010
1011 val->code = ngx_http_script_value_code;
1012 val->value = (uintptr_t) n;
1013 val->text_len = (uintptr_t) value->len;
1014 val->text_data = (uintptr_t) value->data;
1015
1016 return NGX_CONF_OK;
1017 }
1018
1019 complex = ngx_http_script_start_code(cf->pool, &lcf->codes,
1020 sizeof(ngx_http_script_complex_value_code_t));
1021 if (complex == NULL) {
1022 return NGX_CONF_ERROR;
1023 }
1024
1025 complex->code = ngx_http_script_complex_value_code;
1026 complex->lengths = NULL;
1027
1028 ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
1029
1030 sc.cf = cf;
1031 sc.source = value;
1032 sc.lengths = &complex->lengths;
1033 sc.values = &lcf->codes;
1034 sc.variables = n;
1035 sc.complete_lengths = 1;
1036
1037 if (ngx_http_script_compile(&sc) != NGX_OK) {
1038 return NGX_CONF_ERROR;
1039 }
1040
1041 return NGX_CONF_OK;
1042 }
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