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Update and clean Tomato RAF files
[tomato.git] / release / src / router / nginx / src / http / modules / ngx_http_ssi_filter_module.c
blobeb286cc347566eed475f4269199b4df6177c878d
1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) Nginx, Inc.
5 */
6
7
8 #include <ngx_config.h>
9 #include <ngx_core.h>
10 #include <ngx_http.h>
11
12 #define NGX_HTTP_SSI_ERROR 1
13
14 #define NGX_HTTP_SSI_DATE_LEN 2048
15
16 #define NGX_HTTP_SSI_ADD_PREFIX 1
17 #define NGX_HTTP_SSI_ADD_ZERO 2
18
19
20 typedef struct {
21 ngx_flag_t enable;
22 ngx_flag_t silent_errors;
23 ngx_flag_t ignore_recycled_buffers;
24
25 ngx_hash_t types;
26
27 size_t min_file_chunk;
28 size_t value_len;
29
30 ngx_array_t *types_keys;
31 } ngx_http_ssi_loc_conf_t;
32
33
34 typedef struct {
35 ngx_str_t name;
36 ngx_uint_t key;
37 ngx_str_t value;
38 } ngx_http_ssi_var_t;
39
40
41 typedef struct {
42 ngx_str_t name;
43 ngx_chain_t *bufs;
44 ngx_uint_t count;
45 } ngx_http_ssi_block_t;
46
47
48 typedef enum {
49 ssi_start_state = 0,
50 ssi_tag_state,
51 ssi_comment0_state,
52 ssi_comment1_state,
53 ssi_sharp_state,
54 ssi_precommand_state,
55 ssi_command_state,
56 ssi_preparam_state,
57 ssi_param_state,
58 ssi_preequal_state,
59 ssi_prevalue_state,
60 ssi_double_quoted_value_state,
61 ssi_quoted_value_state,
62 ssi_quoted_symbol_state,
63 ssi_postparam_state,
64 ssi_comment_end0_state,
65 ssi_comment_end1_state,
66 ssi_error_state,
67 ssi_error_end0_state,
68 ssi_error_end1_state
69 } ngx_http_ssi_state_e;
70
71
72 static ngx_int_t ngx_http_ssi_output(ngx_http_request_t *r,
73 ngx_http_ssi_ctx_t *ctx);
74 static void ngx_http_ssi_buffered(ngx_http_request_t *r,
75 ngx_http_ssi_ctx_t *ctx);
76 static ngx_int_t ngx_http_ssi_parse(ngx_http_request_t *r,
77 ngx_http_ssi_ctx_t *ctx);
78 static ngx_str_t *ngx_http_ssi_get_variable(ngx_http_request_t *r,
79 ngx_str_t *name, ngx_uint_t key);
80 static ngx_int_t ngx_http_ssi_evaluate_string(ngx_http_request_t *r,
81 ngx_http_ssi_ctx_t *ctx, ngx_str_t *text, ngx_uint_t flags);
82 static ngx_int_t ngx_http_ssi_regex_match(ngx_http_request_t *r,
83 ngx_str_t *pattern, ngx_str_t *str);
84
85 static ngx_int_t ngx_http_ssi_include(ngx_http_request_t *r,
86 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
87 static ngx_int_t ngx_http_ssi_stub_output(ngx_http_request_t *r, void *data,
88 ngx_int_t rc);
89 static ngx_int_t ngx_http_ssi_set_variable(ngx_http_request_t *r, void *data,
90 ngx_int_t rc);
91 static ngx_int_t ngx_http_ssi_echo(ngx_http_request_t *r,
92 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
93 static ngx_int_t ngx_http_ssi_config(ngx_http_request_t *r,
94 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
95 static ngx_int_t ngx_http_ssi_set(ngx_http_request_t *r,
96 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
97 static ngx_int_t ngx_http_ssi_if(ngx_http_request_t *r,
98 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
99 static ngx_int_t ngx_http_ssi_else(ngx_http_request_t *r,
100 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
101 static ngx_int_t ngx_http_ssi_endif(ngx_http_request_t *r,
102 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
103 static ngx_int_t ngx_http_ssi_block(ngx_http_request_t *r,
104 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
105 static ngx_int_t ngx_http_ssi_endblock(ngx_http_request_t *r,
106 ngx_http_ssi_ctx_t *ctx, ngx_str_t **params);
107
108 static ngx_int_t ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r,
109 ngx_http_variable_value_t *v, uintptr_t gmt);
110
111 static ngx_int_t ngx_http_ssi_preconfiguration(ngx_conf_t *cf);
112 static void *ngx_http_ssi_create_main_conf(ngx_conf_t *cf);
113 static char *ngx_http_ssi_init_main_conf(ngx_conf_t *cf, void *conf);
114 static void *ngx_http_ssi_create_loc_conf(ngx_conf_t *cf);
115 static char *ngx_http_ssi_merge_loc_conf(ngx_conf_t *cf,
116 void *parent, void *child);
117 static ngx_int_t ngx_http_ssi_filter_init(ngx_conf_t *cf);
118
119
120 static ngx_command_t ngx_http_ssi_filter_commands[] = {
121
122 { ngx_string("ssi"),
123 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
124 |NGX_CONF_FLAG,
125 ngx_conf_set_flag_slot,
126 NGX_HTTP_LOC_CONF_OFFSET,
127 offsetof(ngx_http_ssi_loc_conf_t, enable),
128 NULL },
129
130 { ngx_string("ssi_silent_errors"),
131 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
132 ngx_conf_set_flag_slot,
133 NGX_HTTP_LOC_CONF_OFFSET,
134 offsetof(ngx_http_ssi_loc_conf_t, silent_errors),
135 NULL },
136
137 { ngx_string("ssi_ignore_recycled_buffers"),
138 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
139 ngx_conf_set_flag_slot,
140 NGX_HTTP_LOC_CONF_OFFSET,
141 offsetof(ngx_http_ssi_loc_conf_t, ignore_recycled_buffers),
142 NULL },
143
144 { ngx_string("ssi_min_file_chunk"),
145 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
146 ngx_conf_set_size_slot,
147 NGX_HTTP_LOC_CONF_OFFSET,
148 offsetof(ngx_http_ssi_loc_conf_t, min_file_chunk),
149 NULL },
150
151 { ngx_string("ssi_value_length"),
152 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
153 ngx_conf_set_size_slot,
154 NGX_HTTP_LOC_CONF_OFFSET,
155 offsetof(ngx_http_ssi_loc_conf_t, value_len),
156 NULL },
157
158 { ngx_string("ssi_types"),
159 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
160 ngx_http_types_slot,
161 NGX_HTTP_LOC_CONF_OFFSET,
162 offsetof(ngx_http_ssi_loc_conf_t, types_keys),
163 &ngx_http_html_default_types[0] },
164
165 ngx_null_command
166 };
167
168
169
170 static ngx_http_module_t ngx_http_ssi_filter_module_ctx = {
171 ngx_http_ssi_preconfiguration, /* preconfiguration */
172 ngx_http_ssi_filter_init, /* postconfiguration */
173
174 ngx_http_ssi_create_main_conf, /* create main configuration */
175 ngx_http_ssi_init_main_conf, /* init main configuration */
176
177 NULL, /* create server configuration */
178 NULL, /* merge server configuration */
179
180 ngx_http_ssi_create_loc_conf, /* create location configuration */
181 ngx_http_ssi_merge_loc_conf /* merge location configuration */
182 };
183
184
185 ngx_module_t ngx_http_ssi_filter_module = {
186 NGX_MODULE_V1,
187 &ngx_http_ssi_filter_module_ctx, /* module context */
188 ngx_http_ssi_filter_commands, /* module directives */
189 NGX_HTTP_MODULE, /* module type */
190 NULL, /* init master */
191 NULL, /* init module */
192 NULL, /* init process */
193 NULL, /* init thread */
194 NULL, /* exit thread */
195 NULL, /* exit process */
196 NULL, /* exit master */
197 NGX_MODULE_V1_PADDING
198 };
199
200
201 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
202 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
203
204
205 static u_char ngx_http_ssi_string[] = "<!--";
206
207 static ngx_str_t ngx_http_ssi_none = ngx_string("(none)");
208 static ngx_str_t ngx_http_ssi_null_string = ngx_null_string;
209
210
211 #define NGX_HTTP_SSI_INCLUDE_VIRTUAL 0
212 #define NGX_HTTP_SSI_INCLUDE_FILE 1
213 #define NGX_HTTP_SSI_INCLUDE_WAIT 2
214 #define NGX_HTTP_SSI_INCLUDE_SET 3
215 #define NGX_HTTP_SSI_INCLUDE_STUB 4
216
217 #define NGX_HTTP_SSI_ECHO_VAR 0
218 #define NGX_HTTP_SSI_ECHO_DEFAULT 1
219 #define NGX_HTTP_SSI_ECHO_ENCODING 2
220
221 #define NGX_HTTP_SSI_CONFIG_ERRMSG 0
222 #define NGX_HTTP_SSI_CONFIG_TIMEFMT 1
223
224 #define NGX_HTTP_SSI_SET_VAR 0
225 #define NGX_HTTP_SSI_SET_VALUE 1
226
227 #define NGX_HTTP_SSI_IF_EXPR 0
228
229 #define NGX_HTTP_SSI_BLOCK_NAME 0
230
231
232 static ngx_http_ssi_param_t ngx_http_ssi_include_params[] = {
233 { ngx_string("virtual"), NGX_HTTP_SSI_INCLUDE_VIRTUAL, 0, 0 },
234 { ngx_string("file"), NGX_HTTP_SSI_INCLUDE_FILE, 0, 0 },
235 { ngx_string("wait"), NGX_HTTP_SSI_INCLUDE_WAIT, 0, 0 },
236 { ngx_string("set"), NGX_HTTP_SSI_INCLUDE_SET, 0, 0 },
237 { ngx_string("stub"), NGX_HTTP_SSI_INCLUDE_STUB, 0, 0 },
238 { ngx_null_string, 0, 0, 0 }
239 };
240
241
242 static ngx_http_ssi_param_t ngx_http_ssi_echo_params[] = {
243 { ngx_string("var"), NGX_HTTP_SSI_ECHO_VAR, 1, 0 },
244 { ngx_string("default"), NGX_HTTP_SSI_ECHO_DEFAULT, 0, 0 },
245 { ngx_string("encoding"), NGX_HTTP_SSI_ECHO_ENCODING, 0, 0 },
246 { ngx_null_string, 0, 0, 0 }
247 };
248
249
250 static ngx_http_ssi_param_t ngx_http_ssi_config_params[] = {
251 { ngx_string("errmsg"), NGX_HTTP_SSI_CONFIG_ERRMSG, 0, 0 },
252 { ngx_string("timefmt"), NGX_HTTP_SSI_CONFIG_TIMEFMT, 0, 0 },
253 { ngx_null_string, 0, 0, 0 }
254 };
255
256
257 static ngx_http_ssi_param_t ngx_http_ssi_set_params[] = {
258 { ngx_string("var"), NGX_HTTP_SSI_SET_VAR, 1, 0 },
259 { ngx_string("value"), NGX_HTTP_SSI_SET_VALUE, 1, 0 },
260 { ngx_null_string, 0, 0, 0 }
261 };
262
263
264 static ngx_http_ssi_param_t ngx_http_ssi_if_params[] = {
265 { ngx_string("expr"), NGX_HTTP_SSI_IF_EXPR, 1, 0 },
266 { ngx_null_string, 0, 0, 0 }
267 };
268
269
270 static ngx_http_ssi_param_t ngx_http_ssi_block_params[] = {
271 { ngx_string("name"), NGX_HTTP_SSI_BLOCK_NAME, 1, 0 },
272 { ngx_null_string, 0, 0, 0 }
273 };
274
275
276 static ngx_http_ssi_param_t ngx_http_ssi_no_params[] = {
277 { ngx_null_string, 0, 0, 0 }
278 };
279
280
281 static ngx_http_ssi_command_t ngx_http_ssi_commands[] = {
282 { ngx_string("include"), ngx_http_ssi_include,
283 ngx_http_ssi_include_params, 0, 0, 1 },
284 { ngx_string("echo"), ngx_http_ssi_echo,
285 ngx_http_ssi_echo_params, 0, 0, 0 },
286 { ngx_string("config"), ngx_http_ssi_config,
287 ngx_http_ssi_config_params, 0, 0, 0 },
288 { ngx_string("set"), ngx_http_ssi_set, ngx_http_ssi_set_params, 0, 0, 0 },
289
290 { ngx_string("if"), ngx_http_ssi_if, ngx_http_ssi_if_params, 0, 0, 0 },
291 { ngx_string("elif"), ngx_http_ssi_if, ngx_http_ssi_if_params,
292 NGX_HTTP_SSI_COND_IF, 0, 0 },
293 { ngx_string("else"), ngx_http_ssi_else, ngx_http_ssi_no_params,
294 NGX_HTTP_SSI_COND_IF, 0, 0 },
295 { ngx_string("endif"), ngx_http_ssi_endif, ngx_http_ssi_no_params,
296 NGX_HTTP_SSI_COND_ELSE, 0, 0 },
297
298 { ngx_string("block"), ngx_http_ssi_block,
299 ngx_http_ssi_block_params, 0, 0, 0 },
300 { ngx_string("endblock"), ngx_http_ssi_endblock,
301 ngx_http_ssi_no_params, 0, 1, 0 },
302
303 { ngx_null_string, NULL, NULL, 0, 0, 0 }
304 };
305
306
307 static ngx_http_variable_t ngx_http_ssi_vars[] = {
308
309 { ngx_string("date_local"), NULL, ngx_http_ssi_date_gmt_local_variable, 0,
310 NGX_HTTP_VAR_NOCACHEABLE, 0 },
311
312 { ngx_string("date_gmt"), NULL, ngx_http_ssi_date_gmt_local_variable, 1,
313 NGX_HTTP_VAR_NOCACHEABLE, 0 },
314
315 { ngx_null_string, NULL, NULL, 0, 0, 0 }
316 };
317
318
319
320 static ngx_int_t
321 ngx_http_ssi_header_filter(ngx_http_request_t *r)
322 {
323 ngx_http_ssi_ctx_t *ctx;
324 ngx_http_ssi_loc_conf_t *slcf;
325
326 slcf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module);
327
328 if (!slcf->enable
329 || r->headers_out.content_length_n == 0
330 || ngx_http_test_content_type(r, &slcf->types) == NULL)
331 {
332 return ngx_http_next_header_filter(r);
333 }
334
335 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_ssi_ctx_t));
336 if (ctx == NULL) {
337 return NGX_ERROR;
338 }
339
340 ngx_http_set_ctx(r, ctx, ngx_http_ssi_filter_module);
341
342
343 ctx->value_len = slcf->value_len;
344 ctx->last_out = &ctx->out;
345
346 ctx->encoding = NGX_HTTP_SSI_ENTITY_ENCODING;
347 ctx->output = 1;
348
349 ctx->params.elts = ctx->params_array;
350 ctx->params.size = sizeof(ngx_table_elt_t);
351 ctx->params.nalloc = NGX_HTTP_SSI_PARAMS_N;
352 ctx->params.pool = r->pool;
353
354 ngx_str_set(&ctx->timefmt, "%A, %d-%b-%Y %H:%M:%S %Z");
355 ngx_str_set(&ctx->errmsg,
356 "[an error occurred while processing the directive]");
357
358 r->filter_need_in_memory = 1;
359
360 if (r == r->main) {
361 ngx_http_clear_content_length(r);
362 ngx_http_clear_last_modified(r);
363 ngx_http_clear_accept_ranges(r);
364 ngx_http_clear_etag(r);
365 }
366
367 return ngx_http_next_header_filter(r);
368 }
369
370
371 static ngx_int_t
372 ngx_http_ssi_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
373 {
374 size_t len;
375 ngx_int_t rc;
376 ngx_buf_t *b;
377 ngx_uint_t i, index;
378 ngx_chain_t *cl, **ll;
379 ngx_table_elt_t *param;
380 ngx_http_ssi_ctx_t *ctx, *mctx;
381 ngx_http_ssi_block_t *bl;
382 ngx_http_ssi_param_t *prm;
383 ngx_http_ssi_command_t *cmd;
384 ngx_http_ssi_loc_conf_t *slcf;
385 ngx_http_ssi_main_conf_t *smcf;
386 ngx_str_t *params[NGX_HTTP_SSI_MAX_PARAMS + 1];
387
388 ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module);
389
390 if (ctx == NULL
391 || (in == NULL
392 && ctx->buf == NULL
393 && ctx->in == NULL
394 && ctx->busy == NULL))
395 {
396 return ngx_http_next_body_filter(r, in);
397 }
398
399 /* add the incoming chain to the chain ctx->in */
400
401 if (in) {
402 if (ngx_chain_add_copy(r->pool, &ctx->in, in) != NGX_OK) {
403 return NGX_ERROR;
404 }
405 }
406
407 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
408 "http ssi filter \"%V?%V\"", &r->uri, &r->args);
409
410 if (ctx->wait) {
411
412 if (r != r->connection->data) {
413 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
414 "http ssi filter wait \"%V?%V\" non-active",
415 &ctx->wait->uri, &ctx->wait->args);
416
417 return NGX_AGAIN;
418 }
419
420 if (ctx->wait->done) {
421 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
422 "http ssi filter wait \"%V?%V\" done",
423 &ctx->wait->uri, &ctx->wait->args);
424
425 ctx->wait = NULL;
426
427 } else {
428 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
429 "http ssi filter wait \"%V?%V\"",
430 &ctx->wait->uri, &ctx->wait->args);
431
432 return ngx_http_next_body_filter(r, NULL);
433 }
434 }
435
436 slcf = ngx_http_get_module_loc_conf(r, ngx_http_ssi_filter_module);
437
438 while (ctx->in || ctx->buf) {
439
440 if (ctx->buf == NULL) {
441 ctx->buf = ctx->in->buf;
442 ctx->in = ctx->in->next;
443 ctx->pos = ctx->buf->pos;
444 }
445
446 if (ctx->state == ssi_start_state) {
447 ctx->copy_start = ctx->pos;
448 ctx->copy_end = ctx->pos;
449 }
450
451 b = NULL;
452
453 while (ctx->pos < ctx->buf->last) {
454
455 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
456 "saved: %d state: %d", ctx->saved, ctx->state);
457
458 rc = ngx_http_ssi_parse(r, ctx);
459
460 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
461 "parse: %d, looked: %d %p-%p",
462 rc, ctx->looked, ctx->copy_start, ctx->copy_end);
463
464 if (rc == NGX_ERROR) {
465 return rc;
466 }
467
468 if (ctx->copy_start != ctx->copy_end) {
469
470 if (ctx->output) {
471
472 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
473 "saved: %d", ctx->saved);
474
475 if (ctx->saved) {
476
477 if (ctx->free) {
478 cl = ctx->free;
479 ctx->free = ctx->free->next;
480 b = cl->buf;
481 ngx_memzero(b, sizeof(ngx_buf_t));
482
483 } else {
484 b = ngx_calloc_buf(r->pool);
485 if (b == NULL) {
486 return NGX_ERROR;
487 }
488
489 cl = ngx_alloc_chain_link(r->pool);
490 if (cl == NULL) {
491 return NGX_ERROR;
492 }
493
494 cl->buf = b;
495 }
496
497 b->memory = 1;
498 b->pos = ngx_http_ssi_string;
499 b->last = ngx_http_ssi_string + ctx->saved;
500
501 *ctx->last_out = cl;
502 ctx->last_out = &cl->next;
503
504 ctx->saved = 0;
505 }
506
507 if (ctx->free) {
508 cl = ctx->free;
509 ctx->free = ctx->free->next;
510 b = cl->buf;
511
512 } else {
513 b = ngx_alloc_buf(r->pool);
514 if (b == NULL) {
515 return NGX_ERROR;
516 }
517
518 cl = ngx_alloc_chain_link(r->pool);
519 if (cl == NULL) {
520 return NGX_ERROR;
521 }
522
523 cl->buf = b;
524 }
525
526 ngx_memcpy(b, ctx->buf, sizeof(ngx_buf_t));
527
528 b->pos = ctx->copy_start;
529 b->last = ctx->copy_end;
530 b->shadow = NULL;
531 b->last_buf = 0;
532 b->recycled = 0;
533
534 if (b->in_file) {
535 if (slcf->min_file_chunk < (size_t) (b->last - b->pos))
536 {
537 b->file_last = b->file_pos
538 + (b->last - ctx->buf->pos);
539 b->file_pos += b->pos - ctx->buf->pos;
540
541 } else {
542 b->in_file = 0;
543 }
544 }
545
546 cl->next = NULL;
547 *ctx->last_out = cl;
548 ctx->last_out = &cl->next;
549
550 } else {
551 if (ctx->block
552 && ctx->saved + (ctx->copy_end - ctx->copy_start))
553 {
554 b = ngx_create_temp_buf(r->pool,
555 ctx->saved + (ctx->copy_end - ctx->copy_start));
556
557 if (b == NULL) {
558 return NGX_ERROR;
559 }
560
561 if (ctx->saved) {
562 b->last = ngx_cpymem(b->pos, ngx_http_ssi_string,
563 ctx->saved);
564 }
565
566 b->last = ngx_cpymem(b->last, ctx->copy_start,
567 ctx->copy_end - ctx->copy_start);
568
569 cl = ngx_alloc_chain_link(r->pool);
570 if (cl == NULL) {
571 return NGX_ERROR;
572 }
573
574 cl->buf = b;
575 cl->next = NULL;
576
577 b = NULL;
578
579 mctx = ngx_http_get_module_ctx(r->main,
580 ngx_http_ssi_filter_module);
581 bl = mctx->blocks->elts;
582 for (ll = &bl[mctx->blocks->nelts - 1].bufs;
583 *ll;
584 ll = &(*ll)->next)
585 {
586 /* void */
587 }
588
589 *ll = cl;
590 }
591
592 ctx->saved = 0;
593 }
594 }
595
596 if (ctx->state == ssi_start_state) {
597 ctx->copy_start = ctx->pos;
598 ctx->copy_end = ctx->pos;
599
600 } else {
601 ctx->copy_start = NULL;
602 ctx->copy_end = NULL;
603 }
604
605 if (rc == NGX_AGAIN) {
606 continue;
607 }
608
609
610 b = NULL;
611
612 if (rc == NGX_OK) {
613
614 smcf = ngx_http_get_module_main_conf(r,
615 ngx_http_ssi_filter_module);
616
617 cmd = ngx_hash_find(&smcf->hash, ctx->key, ctx->command.data,
618 ctx->command.len);
619
620 if (cmd == NULL) {
621 if (ctx->output) {
622 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
623 "invalid SSI command: \"%V\"",
624 &ctx->command);
625 goto ssi_error;
626 }
627
628 continue;
629 }
630
631 if (!ctx->output && !cmd->block) {
632
633 if (ctx->block) {
634
635 /* reconstruct the SSI command text */
636
637 len = 5 + ctx->command.len + 4;
638
639 param = ctx->params.elts;
640 for (i = 0; i < ctx->params.nelts; i++) {
641 len += 1 + param[i].key.len + 2
642 + param[i].value.len + 1;
643 }
644
645 b = ngx_create_temp_buf(r->pool, len);
646
647 if (b == NULL) {
648 return NGX_ERROR;
649 }
650
651 cl = ngx_alloc_chain_link(r->pool);
652 if (cl == NULL) {
653 return NGX_ERROR;
654 }
655
656 cl->buf = b;
657 cl->next = NULL;
658
659 *b->last++ = '<';
660 *b->last++ = '!';
661 *b->last++ = '-';
662 *b->last++ = '-';
663 *b->last++ = '#';
664
665 b->last = ngx_cpymem(b->last, ctx->command.data,
666 ctx->command.len);
667
668 for (i = 0; i < ctx->params.nelts; i++) {
669 *b->last++ = ' ';
670 b->last = ngx_cpymem(b->last, param[i].key.data,
671 param[i].key.len);
672 *b->last++ = '=';
673 *b->last++ = '"';
674 b->last = ngx_cpymem(b->last, param[i].value.data,
675 param[i].value.len);
676 *b->last++ = '"';
677 }
678
679 *b->last++ = ' ';
680 *b->last++ = '-';
681 *b->last++ = '-';
682 *b->last++ = '>';
683
684 mctx = ngx_http_get_module_ctx(r->main,
685 ngx_http_ssi_filter_module);
686 bl = mctx->blocks->elts;
687 for (ll = &bl[mctx->blocks->nelts - 1].bufs;
688 *ll;
689 ll = &(*ll)->next)
690 {
691 /* void */
692 }
693
694 *ll = cl;
695
696 b = NULL;
697
698 continue;
699 }
700
701 if (cmd->conditional == 0) {
702 continue;
703 }
704 }
705
706 if (cmd->conditional
707 && (ctx->conditional == 0
708 || ctx->conditional > cmd->conditional))
709 {
710 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
711 "invalid context of SSI command: \"%V\"",
712 &ctx->command);
713 goto ssi_error;
714 }
715
716 if (ctx->params.nelts > NGX_HTTP_SSI_MAX_PARAMS) {
717 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
718 "too many SSI command parameters: \"%V\"",
719 &ctx->command);
720 goto ssi_error;
721 }
722
723 ngx_memzero(params,
724 (NGX_HTTP_SSI_MAX_PARAMS + 1) * sizeof(ngx_str_t *));
725
726 param = ctx->params.elts;
727
728 for (i = 0; i < ctx->params.nelts; i++) {
729
730 for (prm = cmd->params; prm->name.len; prm++) {
731
732 if (param[i].key.len != prm->name.len
733 || ngx_strncmp(param[i].key.data, prm->name.data,
734 prm->name.len) != 0)
735 {
736 continue;
737 }
738
739 if (!prm->multiple) {
740 if (params[prm->index]) {
741 ngx_log_error(NGX_LOG_ERR,
742 r->connection->log, 0,
743 "duplicate \"%V\" parameter "
744 "in \"%V\" SSI command",
745 &param[i].key, &ctx->command);
746
747 goto ssi_error;
748 }
749
750 params[prm->index] = &param[i].value;
751
752 break;
753 }
754
755 for (index = prm->index; params[index]; index++) {
756 /* void */
757 }
758
759 params[index] = &param[i].value;
760
761 break;
762 }
763
764 if (prm->name.len == 0) {
765 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
766 "invalid parameter name: \"%V\" "
767 "in \"%V\" SSI command",
768 &param[i].key, &ctx->command);
769
770 goto ssi_error;
771 }
772 }
773
774 for (prm = cmd->params; prm->name.len; prm++) {
775 if (prm->mandatory && params[prm->index] == 0) {
776 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
777 "mandatory \"%V\" parameter is absent "
778 "in \"%V\" SSI command",
779 &prm->name, &ctx->command);
780
781 goto ssi_error;
782 }
783 }
784
785 if (cmd->flush && ctx->out) {
786
787 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
788 "ssi flush");
789
790 if (ngx_http_ssi_output(r, ctx) == NGX_ERROR) {
791 return NGX_ERROR;
792 }
793 }
794
795 rc = cmd->handler(r, ctx, params);
796
797 if (rc == NGX_OK) {
798 continue;
799 }
800
801 if (rc == NGX_DONE || rc == NGX_AGAIN || rc == NGX_ERROR) {
802 ngx_http_ssi_buffered(r, ctx);
803 return rc;
804 }
805 }
806
807
808 /* rc == NGX_HTTP_SSI_ERROR */
809
810 ssi_error:
811
812 if (slcf->silent_errors) {
813 continue;
814 }
815
816 if (ctx->free) {
817 cl = ctx->free;
818 ctx->free = ctx->free->next;
819 b = cl->buf;
820 ngx_memzero(b, sizeof(ngx_buf_t));
821
822 } else {
823 b = ngx_calloc_buf(r->pool);
824 if (b == NULL) {
825 return NGX_ERROR;
826 }
827
828 cl = ngx_alloc_chain_link(r->pool);
829 if (cl == NULL) {
830 return NGX_ERROR;
831 }
832
833 cl->buf = b;
834 }
835
836 b->memory = 1;
837 b->pos = ctx->errmsg.data;
838 b->last = ctx->errmsg.data + ctx->errmsg.len;
839
840 cl->next = NULL;
841 *ctx->last_out = cl;
842 ctx->last_out = &cl->next;
843
844 continue;
845 }
846
847 if (ctx->buf->last_buf || ngx_buf_in_memory(ctx->buf)) {
848 if (b == NULL) {
849 if (ctx->free) {
850 cl = ctx->free;
851 ctx->free = ctx->free->next;
852 b = cl->buf;
853 ngx_memzero(b, sizeof(ngx_buf_t));
854
855 } else {
856 b = ngx_calloc_buf(r->pool);
857 if (b == NULL) {
858 return NGX_ERROR;
859 }
860
861 cl = ngx_alloc_chain_link(r->pool);
862 if (cl == NULL) {
863 return NGX_ERROR;
864 }
865
866 cl->buf = b;
867 }
868
869 b->sync = 1;
870
871 cl->next = NULL;
872 *ctx->last_out = cl;
873 ctx->last_out = &cl->next;
874 }
875
876 b->last_buf = ctx->buf->last_buf;
877 b->shadow = ctx->buf;
878
879 if (slcf->ignore_recycled_buffers == 0) {
880 b->recycled = ctx->buf->recycled;
881 }
882 }
883
884 ctx->buf = NULL;
885
886 ctx->saved = ctx->looked;
887 }
888
889 if (ctx->out == NULL && ctx->busy == NULL) {
890 return NGX_OK;
891 }
892
893 return ngx_http_ssi_output(r, ctx);
894 }
895
896
897 static ngx_int_t
898 ngx_http_ssi_output(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx)
899 {
900 ngx_int_t rc;
901 ngx_buf_t *b;
902 ngx_chain_t *cl;
903
904 #if 1
905 b = NULL;
906 for (cl = ctx->out; cl; cl = cl->next) {
907 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
908 "ssi out: %p %p", cl->buf, cl->buf->pos);
909 if (cl->buf == b) {
910 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
911 "the same buf was used in ssi");
912 ngx_debug_point();
913 return NGX_ERROR;
914 }
915 b = cl->buf;
916 }
917 #endif
918
919 rc = ngx_http_next_body_filter(r, ctx->out);
920
921 if (ctx->busy == NULL) {
922 ctx->busy = ctx->out;
923
924 } else {
925 for (cl = ctx->busy; cl->next; cl = cl->next) { /* void */ }
926 cl->next = ctx->out;
927 }
928
929 ctx->out = NULL;
930 ctx->last_out = &ctx->out;
931
932 while (ctx->busy) {
933
934 cl = ctx->busy;
935 b = cl->buf;
936
937 if (ngx_buf_size(b) != 0) {
938 break;
939 }
940
941 if (b->shadow) {
942 b->shadow->pos = b->shadow->last;
943 }
944
945 ctx->busy = cl->next;
946
947 if (ngx_buf_in_memory(b) || b->in_file) {
948 /* add data bufs only to the free buf chain */
949
950 cl->next = ctx->free;
951 ctx->free = cl;
952 }
953 }
954
955 ngx_http_ssi_buffered(r, ctx);
956
957 return rc;
958 }
959
960
961 static void
962 ngx_http_ssi_buffered(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx)
963 {
964 if (ctx->in || ctx->buf) {
965 r->buffered |= NGX_HTTP_SSI_BUFFERED;
966
967 } else {
968 r->buffered &= ~NGX_HTTP_SSI_BUFFERED;
969 }
970 }
971
972
973 static ngx_int_t
974 ngx_http_ssi_parse(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx)
975 {
976 u_char *p, *value, *last, *copy_end, ch;
977 size_t looked;
978 ngx_http_ssi_state_e state;
979
980 state = ctx->state;
981 looked = ctx->looked;
982 last = ctx->buf->last;
983 copy_end = ctx->copy_end;
984
985 for (p = ctx->pos; p < last; p++) {
986
987 ch = *p;
988
989 if (state == ssi_start_state) {
990
991 /* the tight loop */
992
993 for ( ;; ) {
994 if (ch == '<') {
995 copy_end = p;
996 looked = 1;
997 state = ssi_tag_state;
998
999 goto tag_started;
1000 }
1001
1002 if (++p == last) {
1003 break;
1004 }
1005
1006 ch = *p;
1007 }
1008
1009 ctx->state = state;
1010 ctx->pos = p;
1011 ctx->looked = looked;
1012 ctx->copy_end = p;
1013
1014 if (ctx->copy_start == NULL) {
1015 ctx->copy_start = ctx->buf->pos;
1016 }
1017
1018 return NGX_AGAIN;
1019
1020 tag_started:
1021
1022 continue;
1023 }
1024
1025 switch (state) {
1026
1027 case ssi_start_state:
1028 /* not reached */
1029 break;
1030
1031 case ssi_tag_state:
1032 switch (ch) {
1033 case '!':
1034 looked = 2;
1035 state = ssi_comment0_state;
1036 break;
1037
1038 case '<':
1039 copy_end = p;
1040 break;
1041
1042 default:
1043 copy_end = p;
1044 looked = 0;
1045 state = ssi_start_state;
1046 break;
1047 }
1048
1049 break;
1050
1051 case ssi_comment0_state:
1052 switch (ch) {
1053 case '-':
1054 looked = 3;
1055 state = ssi_comment1_state;
1056 break;
1057
1058 case '<':
1059 copy_end = p;
1060 looked = 1;
1061 state = ssi_tag_state;
1062 break;
1063
1064 default:
1065 copy_end = p;
1066 looked = 0;
1067 state = ssi_start_state;
1068 break;
1069 }
1070
1071 break;
1072
1073 case ssi_comment1_state:
1074 switch (ch) {
1075 case '-':
1076 looked = 4;
1077 state = ssi_sharp_state;
1078 break;
1079
1080 case '<':
1081 copy_end = p;
1082 looked = 1;
1083 state = ssi_tag_state;
1084 break;
1085
1086 default:
1087 copy_end = p;
1088 looked = 0;
1089 state = ssi_start_state;
1090 break;
1091 }
1092
1093 break;
1094
1095 case ssi_sharp_state:
1096 switch (ch) {
1097 case '#':
1098 if (p - ctx->pos < 4) {
1099 ctx->saved = 0;
1100 }
1101 looked = 0;
1102 state = ssi_precommand_state;
1103 break;
1104
1105 case '<':
1106 copy_end = p;
1107 looked = 1;
1108 state = ssi_tag_state;
1109 break;
1110
1111 default:
1112 copy_end = p;
1113 looked = 0;
1114 state = ssi_start_state;
1115 break;
1116 }
1117
1118 break;
1119
1120 case ssi_precommand_state:
1121 switch (ch) {
1122 case ' ':
1123 case CR:
1124 case LF:
1125 case '\t':
1126 break;
1127
1128 default:
1129 ctx->command.len = 1;
1130 ctx->command.data = ngx_pnalloc(r->pool,
1131 NGX_HTTP_SSI_COMMAND_LEN);
1132 if (ctx->command.data == NULL) {
1133 return NGX_ERROR;
1134 }
1135
1136 ctx->command.data[0] = ch;
1137
1138 ctx->key = 0;
1139 ctx->key = ngx_hash(ctx->key, ch);
1140
1141 ctx->params.nelts = 0;
1142
1143 state = ssi_command_state;
1144 break;
1145 }
1146
1147 break;
1148
1149 case ssi_command_state:
1150 switch (ch) {
1151 case ' ':
1152 case CR:
1153 case LF:
1154 case '\t':
1155 state = ssi_preparam_state;
1156 break;
1157
1158 case '-':
1159 state = ssi_comment_end0_state;
1160 break;
1161
1162 default:
1163 if (ctx->command.len == NGX_HTTP_SSI_COMMAND_LEN) {
1164 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1165 "the \"%V%c...\" SSI command is too long",
1166 &ctx->command, ch);
1167
1168 state = ssi_error_state;
1169 break;
1170 }
1171
1172 ctx->command.data[ctx->command.len++] = ch;
1173 ctx->key = ngx_hash(ctx->key, ch);
1174 }
1175
1176 break;
1177
1178 case ssi_preparam_state:
1179 switch (ch) {
1180 case ' ':
1181 case CR:
1182 case LF:
1183 case '\t':
1184 break;
1185
1186 case '-':
1187 state = ssi_comment_end0_state;
1188 break;
1189
1190 default:
1191 ctx->param = ngx_array_push(&ctx->params);
1192 if (ctx->param == NULL) {
1193 return NGX_ERROR;
1194 }
1195
1196 ctx->param->key.len = 1;
1197 ctx->param->key.data = ngx_pnalloc(r->pool,
1198 NGX_HTTP_SSI_PARAM_LEN);
1199 if (ctx->param->key.data == NULL) {
1200 return NGX_ERROR;
1201 }
1202
1203 ctx->param->key.data[0] = ch;
1204
1205 ctx->param->value.len = 0;
1206
1207 if (ctx->value_buf == NULL) {
1208 ctx->param->value.data = ngx_pnalloc(r->pool,
1209 ctx->value_len + 1);
1210 if (ctx->param->value.data == NULL) {
1211 return NGX_ERROR;
1212 }
1213
1214 } else {
1215 ctx->param->value.data = ctx->value_buf;
1216 }
1217
1218 state = ssi_param_state;
1219 break;
1220 }
1221
1222 break;
1223
1224 case ssi_param_state:
1225 switch (ch) {
1226 case ' ':
1227 case CR:
1228 case LF:
1229 case '\t':
1230 state = ssi_preequal_state;
1231 break;
1232
1233 case '=':
1234 state = ssi_prevalue_state;
1235 break;
1236
1237 case '-':
1238 state = ssi_error_end0_state;
1239
1240 ctx->param->key.data[ctx->param->key.len++] = ch;
1241 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1242 "invalid \"%V\" parameter in \"%V\" SSI command",
1243 &ctx->param->key, &ctx->command);
1244 break;
1245
1246 default:
1247 if (ctx->param->key.len == NGX_HTTP_SSI_PARAM_LEN) {
1248 state = ssi_error_state;
1249 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1250 "too long \"%V%c...\" parameter in "
1251 "\"%V\" SSI command",
1252 &ctx->param->key, ch, &ctx->command);
1253 break;
1254 }
1255
1256 ctx->param->key.data[ctx->param->key.len++] = ch;
1257 }
1258
1259 break;
1260
1261 case ssi_preequal_state:
1262 switch (ch) {
1263 case ' ':
1264 case CR:
1265 case LF:
1266 case '\t':
1267 break;
1268
1269 case '=':
1270 state = ssi_prevalue_state;
1271 break;
1272
1273 default:
1274 if (ch == '-') {
1275 state = ssi_error_end0_state;
1276 } else {
1277 state = ssi_error_state;
1278 }
1279
1280 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1281 "unexpected \"%c\" symbol after \"%V\" "
1282 "parameter in \"%V\" SSI command",
1283 ch, &ctx->param->key, &ctx->command);
1284 break;
1285 }
1286
1287 break;
1288
1289 case ssi_prevalue_state:
1290 switch (ch) {
1291 case ' ':
1292 case CR:
1293 case LF:
1294 case '\t':
1295 break;
1296
1297 case '"':
1298 state = ssi_double_quoted_value_state;
1299 break;
1300
1301 case '\'':
1302 state = ssi_quoted_value_state;
1303 break;
1304
1305 default:
1306 if (ch == '-') {
1307 state = ssi_error_end0_state;
1308 } else {
1309 state = ssi_error_state;
1310 }
1311
1312 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1313 "unexpected \"%c\" symbol before value of "
1314 "\"%V\" parameter in \"%V\" SSI command",
1315 ch, &ctx->param->key, &ctx->command);
1316 break;
1317 }
1318
1319 break;
1320
1321 case ssi_double_quoted_value_state:
1322 switch (ch) {
1323 case '"':
1324 state = ssi_postparam_state;
1325 break;
1326
1327 case '\\':
1328 ctx->saved_state = ssi_double_quoted_value_state;
1329 state = ssi_quoted_symbol_state;
1330
1331 /* fall through */
1332
1333 default:
1334 if (ctx->param->value.len == ctx->value_len) {
1335 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1336 "too long \"%V%c...\" value of \"%V\" "
1337 "parameter in \"%V\" SSI command",
1338 &ctx->param->value, ch, &ctx->param->key,
1339 &ctx->command);
1340 state = ssi_error_state;
1341 break;
1342 }
1343
1344 ctx->param->value.data[ctx->param->value.len++] = ch;
1345 }
1346
1347 break;
1348
1349 case ssi_quoted_value_state:
1350 switch (ch) {
1351 case '\'':
1352 state = ssi_postparam_state;
1353 break;
1354
1355 case '\\':
1356 ctx->saved_state = ssi_quoted_value_state;
1357 state = ssi_quoted_symbol_state;
1358
1359 /* fall through */
1360
1361 default:
1362 if (ctx->param->value.len == ctx->value_len) {
1363 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1364 "too long \"%V%c...\" value of \"%V\" "
1365 "parameter in \"%V\" SSI command",
1366 &ctx->param->value, ch, &ctx->param->key,
1367 &ctx->command);
1368 state = ssi_error_state;
1369 break;
1370 }
1371
1372 ctx->param->value.data[ctx->param->value.len++] = ch;
1373 }
1374
1375 break;
1376
1377 case ssi_quoted_symbol_state:
1378 state = ctx->saved_state;
1379
1380 if (ctx->param->value.len == ctx->value_len) {
1381 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1382 "too long \"%V%c...\" value of \"%V\" "
1383 "parameter in \"%V\" SSI command",
1384 &ctx->param->value, ch, &ctx->param->key,
1385 &ctx->command);
1386 state = ssi_error_state;
1387 break;
1388 }
1389
1390 ctx->param->value.data[ctx->param->value.len++] = ch;
1391
1392 break;
1393
1394 case ssi_postparam_state:
1395
1396 if (ctx->param->value.len + 1 < ctx->value_len / 2) {
1397 value = ngx_pnalloc(r->pool, ctx->param->value.len + 1);
1398 if (value == NULL) {
1399 return NGX_ERROR;
1400 }
1401
1402 ngx_memcpy(value, ctx->param->value.data,
1403 ctx->param->value.len);
1404
1405 ctx->value_buf = ctx->param->value.data;
1406 ctx->param->value.data = value;
1407
1408 } else {
1409 ctx->value_buf = NULL;
1410 }
1411
1412 switch (ch) {
1413 case ' ':
1414 case CR:
1415 case LF:
1416 case '\t':
1417 state = ssi_preparam_state;
1418 break;
1419
1420 case '-':
1421 state = ssi_comment_end0_state;
1422 break;
1423
1424 default:
1425 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1426 "unexpected \"%c\" symbol after \"%V\" value "
1427 "of \"%V\" parameter in \"%V\" SSI command",
1428 ch, &ctx->param->value, &ctx->param->key,
1429 &ctx->command);
1430 state = ssi_error_state;
1431 break;
1432 }
1433
1434 break;
1435
1436 case ssi_comment_end0_state:
1437 switch (ch) {
1438 case '-':
1439 state = ssi_comment_end1_state;
1440 break;
1441
1442 default:
1443 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1444 "unexpected \"%c\" symbol in \"%V\" SSI command",
1445 ch, &ctx->command);
1446 state = ssi_error_state;
1447 break;
1448 }
1449
1450 break;
1451
1452 case ssi_comment_end1_state:
1453 switch (ch) {
1454 case '>':
1455 ctx->state = ssi_start_state;
1456 ctx->pos = p + 1;
1457 ctx->looked = looked;
1458 ctx->copy_end = copy_end;
1459
1460 if (ctx->copy_start == NULL && copy_end) {
1461 ctx->copy_start = ctx->buf->pos;
1462 }
1463
1464 return NGX_OK;
1465
1466 default:
1467 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1468 "unexpected \"%c\" symbol in \"%V\" SSI command",
1469 ch, &ctx->command);
1470 state = ssi_error_state;
1471 break;
1472 }
1473
1474 break;
1475
1476 case ssi_error_state:
1477 switch (ch) {
1478 case '-':
1479 state = ssi_error_end0_state;
1480 break;
1481
1482 default:
1483 break;
1484 }
1485
1486 break;
1487
1488 case ssi_error_end0_state:
1489 switch (ch) {
1490 case '-':
1491 state = ssi_error_end1_state;
1492 break;
1493
1494 default:
1495 state = ssi_error_state;
1496 break;
1497 }
1498
1499 break;
1500
1501 case ssi_error_end1_state:
1502 switch (ch) {
1503 case '>':
1504 ctx->state = ssi_start_state;
1505 ctx->pos = p + 1;
1506 ctx->looked = looked;
1507 ctx->copy_end = copy_end;
1508
1509 if (ctx->copy_start == NULL && copy_end) {
1510 ctx->copy_start = ctx->buf->pos;
1511 }
1512
1513 return NGX_HTTP_SSI_ERROR;
1514
1515 default:
1516 state = ssi_error_state;
1517 break;
1518 }
1519
1520 break;
1521 }
1522 }
1523
1524 ctx->state = state;
1525 ctx->pos = p;
1526 ctx->looked = looked;
1527
1528 ctx->copy_end = (state == ssi_start_state) ? p : copy_end;
1529
1530 if (ctx->copy_start == NULL && ctx->copy_end) {
1531 ctx->copy_start = ctx->buf->pos;
1532 }
1533
1534 return NGX_AGAIN;
1535 }
1536
1537
1538 static ngx_str_t *
1539 ngx_http_ssi_get_variable(ngx_http_request_t *r, ngx_str_t *name,
1540 ngx_uint_t key)
1541 {
1542 ngx_uint_t i;
1543 ngx_list_part_t *part;
1544 ngx_http_ssi_var_t *var;
1545 ngx_http_ssi_ctx_t *ctx;
1546
1547 ctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module);
1548
1549 #if (NGX_PCRE)
1550 {
1551 ngx_str_t *value;
1552
1553 if (key >= '0' && key <= '9') {
1554 i = key - '0';
1555
1556 if (i < ctx->ncaptures) {
1557 value = ngx_palloc(r->pool, sizeof(ngx_str_t));
1558 if (value == NULL) {
1559 return NULL;
1560 }
1561
1562 i *= 2;
1563
1564 value->data = ctx->captures_data + ctx->captures[i];
1565 value->len = ctx->captures[i + 1] - ctx->captures[i];
1566
1567 return value;
1568 }
1569 }
1570 }
1571 #endif
1572
1573 if (ctx->variables == NULL) {
1574 return NULL;
1575 }
1576
1577 part = &ctx->variables->part;
1578 var = part->elts;
1579
1580 for (i = 0; /* void */ ; i++) {
1581
1582 if (i >= part->nelts) {
1583 if (part->next == NULL) {
1584 break;
1585 }
1586
1587 part = part->next;
1588 var = part->elts;
1589 i = 0;
1590 }
1591
1592 if (name->len != var[i].name.len) {
1593 continue;
1594 }
1595
1596 if (key != var[i].key) {
1597 continue;
1598 }
1599
1600 if (ngx_strncmp(name->data, var[i].name.data, name->len) == 0) {
1601 return &var[i].value;
1602 }
1603 }
1604
1605 return NULL;
1606 }
1607
1608
1609 static ngx_int_t
1610 ngx_http_ssi_evaluate_string(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
1611 ngx_str_t *text, ngx_uint_t flags)
1612 {
1613 u_char ch, *p, **value, *data, *part_data;
1614 size_t *size, len, prefix, part_len;
1615 ngx_str_t var, *val;
1616 ngx_int_t key;
1617 ngx_uint_t i, n, bracket, quoted;
1618 ngx_array_t lengths, values;
1619 ngx_http_variable_value_t *vv;
1620
1621 n = ngx_http_script_variables_count(text);
1622
1623 if (n == 0) {
1624
1625 data = text->data;
1626 p = data;
1627
1628 if ((flags & NGX_HTTP_SSI_ADD_PREFIX) && text->data[0] != '/') {
1629
1630 for (prefix = r->uri.len; prefix; prefix--) {
1631 if (r->uri.data[prefix - 1] == '/') {
1632 break;
1633 }
1634 }
1635
1636 if (prefix) {
1637 len = prefix + text->len;
1638
1639 data = ngx_pnalloc(r->pool, len);
1640 if (data == NULL) {
1641 return NGX_ERROR;
1642 }
1643
1644 p = ngx_copy(data, r->uri.data, prefix);
1645 }
1646 }
1647
1648 quoted = 0;
1649
1650 for (i = 0; i < text->len; i++) {
1651 ch = text->data[i];
1652
1653 if (!quoted) {
1654
1655 if (ch == '\\') {
1656 quoted = 1;
1657 continue;
1658 }
1659
1660 } else {
1661 quoted = 0;
1662
1663 if (ch != '\\' && ch != '\'' && ch != '"' && ch != '$') {
1664 *p++ = '\\';
1665 }
1666 }
1667
1668 *p++ = ch;
1669 }
1670
1671 text->len = p - data;
1672 text->data = data;
1673
1674 return NGX_OK;
1675 }
1676
1677 if (ngx_array_init(&lengths, r->pool, 8, sizeof(size_t *)) != NGX_OK) {
1678 return NGX_ERROR;
1679 }
1680
1681 if (ngx_array_init(&values, r->pool, 8, sizeof(u_char *)) != NGX_OK) {
1682 return NGX_ERROR;
1683 }
1684
1685 len = 0;
1686 i = 0;
1687
1688 while (i < text->len) {
1689
1690 if (text->data[i] == '$') {
1691
1692 var.len = 0;
1693
1694 if (++i == text->len) {
1695 goto invalid_variable;
1696 }
1697
1698 if (text->data[i] == '{') {
1699 bracket = 1;
1700
1701 if (++i == text->len) {
1702 goto invalid_variable;
1703 }
1704
1705 var.data = &text->data[i];
1706
1707 } else {
1708 bracket = 0;
1709 var.data = &text->data[i];
1710 }
1711
1712 for ( /* void */ ; i < text->len; i++, var.len++) {
1713 ch = text->data[i];
1714
1715 if (ch == '}' && bracket) {
1716 i++;
1717 bracket = 0;
1718 break;
1719 }
1720
1721 if ((ch >= 'A' && ch <= 'Z')
1722 || (ch >= 'a' && ch <= 'z')
1723 || (ch >= '0' && ch <= '9')
1724 || ch == '_')
1725 {
1726 continue;
1727 }
1728
1729 break;
1730 }
1731
1732 if (bracket) {
1733 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1734 "the closing bracket in \"%V\" "
1735 "variable is missing", &var);
1736 return NGX_HTTP_SSI_ERROR;
1737 }
1738
1739 if (var.len == 0) {
1740 goto invalid_variable;
1741 }
1742
1743 key = ngx_hash_strlow(var.data, var.data, var.len);
1744
1745 val = ngx_http_ssi_get_variable(r, &var, key);
1746
1747 if (val == NULL) {
1748 vv = ngx_http_get_variable(r, &var, key);
1749 if (vv == NULL) {
1750 return NGX_ERROR;
1751 }
1752
1753 if (vv->not_found) {
1754 continue;
1755 }
1756
1757 part_data = vv->data;
1758 part_len = vv->len;
1759
1760 } else {
1761 part_data = val->data;
1762 part_len = val->len;
1763 }
1764
1765 } else {
1766 part_data = &text->data[i];
1767 quoted = 0;
1768
1769 for (p = part_data; i < text->len; i++) {
1770 ch = text->data[i];
1771
1772 if (!quoted) {
1773
1774 if (ch == '\\') {
1775 quoted = 1;
1776 continue;
1777 }
1778
1779 if (ch == '$') {
1780 break;
1781 }
1782
1783 } else {
1784 quoted = 0;
1785
1786 if (ch != '\\' && ch != '\'' && ch != '"' && ch != '$') {
1787 *p++ = '\\';
1788 }
1789 }
1790
1791 *p++ = ch;
1792 }
1793
1794 part_len = p - part_data;
1795 }
1796
1797 len += part_len;
1798
1799 size = ngx_array_push(&lengths);
1800 if (size == NULL) {
1801 return NGX_ERROR;
1802 }
1803
1804 *size = part_len;
1805
1806 value = ngx_array_push(&values);
1807 if (value == NULL) {
1808 return NGX_ERROR;
1809 }
1810
1811 *value = part_data;
1812 }
1813
1814 prefix = 0;
1815
1816 size = lengths.elts;
1817 value = values.elts;
1818
1819 if (flags & NGX_HTTP_SSI_ADD_PREFIX) {
1820 for (i = 0; i < values.nelts; i++) {
1821 if (size[i] != 0) {
1822 if (*value[i] != '/') {
1823 for (prefix = r->uri.len; prefix; prefix--) {
1824 if (r->uri.data[prefix - 1] == '/') {
1825 len += prefix;
1826 break;
1827 }
1828 }
1829 }
1830
1831 break;
1832 }
1833 }
1834 }
1835
1836 p = ngx_pnalloc(r->pool, len + ((flags & NGX_HTTP_SSI_ADD_ZERO) ? 1 : 0));
1837 if (p == NULL) {
1838 return NGX_ERROR;
1839 }
1840
1841 text->len = len;
1842 text->data = p;
1843
1844 p = ngx_copy(p, r->uri.data, prefix);
1845
1846 for (i = 0; i < values.nelts; i++) {
1847 p = ngx_copy(p, value[i], size[i]);
1848 }
1849
1850 return NGX_OK;
1851
1852 invalid_variable:
1853
1854 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1855 "invalid variable name in \"%V\"", text);
1856
1857 return NGX_HTTP_SSI_ERROR;
1858 }
1859
1860
1861 static ngx_int_t
1862 ngx_http_ssi_regex_match(ngx_http_request_t *r, ngx_str_t *pattern,
1863 ngx_str_t *str)
1864 {
1865 #if (NGX_PCRE)
1866 int rc, *captures;
1867 u_char *p, errstr[NGX_MAX_CONF_ERRSTR];
1868 size_t size;
1869 ngx_int_t key;
1870 ngx_str_t *vv, name, value;
1871 ngx_uint_t i, n;
1872 ngx_http_ssi_ctx_t *ctx;
1873 ngx_http_ssi_var_t *var;
1874 ngx_regex_compile_t rgc;
1875
1876 ngx_memzero(&rgc, sizeof(ngx_regex_compile_t));
1877
1878 rgc.pattern = *pattern;
1879 rgc.pool = r->pool;
1880 rgc.err.len = NGX_MAX_CONF_ERRSTR;
1881 rgc.err.data = errstr;
1882
1883 if (ngx_regex_compile(&rgc) != NGX_OK) {
1884 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "%V", &rgc.err);
1885 return NGX_HTTP_SSI_ERROR;
1886 }
1887
1888 n = (rgc.captures + 1) * 3;
1889
1890 captures = ngx_palloc(r->pool, n * sizeof(int));
1891 if (captures == NULL) {
1892 return NGX_ERROR;
1893 }
1894
1895 rc = ngx_regex_exec(rgc.regex, str, captures, n);
1896
1897 if (rc < NGX_REGEX_NO_MATCHED) {
1898 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
1899 ngx_regex_exec_n " failed: %i on \"%V\" using \"%V\"",
1900 rc, str, pattern);
1901 return NGX_HTTP_SSI_ERROR;
1902 }
1903
1904 if (rc == NGX_REGEX_NO_MATCHED) {
1905 return NGX_DECLINED;
1906 }
1907
1908 ctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module);
1909
1910 ctx->ncaptures = rc;
1911 ctx->captures = captures;
1912 ctx->captures_data = str->data;
1913
1914 if (rgc.named_captures > 0) {
1915
1916 if (ctx->variables == NULL) {
1917 ctx->variables = ngx_list_create(r->pool, 4,
1918 sizeof(ngx_http_ssi_var_t));
1919 if (ctx->variables == NULL) {
1920 return NGX_ERROR;
1921 }
1922 }
1923
1924 size = rgc.name_size;
1925 p = rgc.names;
1926
1927 for (i = 0; i < (ngx_uint_t) rgc.named_captures; i++, p += size) {
1928
1929 name.data = &p[2];
1930 name.len = ngx_strlen(name.data);
1931
1932 n = 2 * ((p[0] << 8) + p[1]);
1933
1934 value.data = &str->data[captures[n]];
1935 value.len = captures[n + 1] - captures[n];
1936
1937 key = ngx_hash_strlow(name.data, name.data, name.len);
1938
1939 vv = ngx_http_ssi_get_variable(r, &name, key);
1940
1941 if (vv) {
1942 *vv = value;
1943 continue;
1944 }
1945
1946 var = ngx_list_push(ctx->variables);
1947 if (var == NULL) {
1948 return NGX_ERROR;
1949 }
1950
1951 var->name = name;
1952 var->key = key;
1953 var->value = value;
1954 }
1955 }
1956
1957 return NGX_OK;
1958
1959 #else
1960
1961 ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
1962 "the using of the regex \"%V\" in SSI requires PCRE library",
1963 pattern);
1964 return NGX_HTTP_SSI_ERROR;
1965
1966 #endif
1967 }
1968
1969
1970 static ngx_int_t
1971 ngx_http_ssi_include(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
1972 ngx_str_t **params)
1973 {
1974 u_char *dst, *src;
1975 size_t len;
1976 ngx_int_t rc, key;
1977 ngx_str_t *uri, *file, *wait, *set, *stub, args;
1978 ngx_buf_t *b;
1979 ngx_uint_t flags, i;
1980 ngx_chain_t *cl, *tl, **ll, *out;
1981 ngx_http_request_t *sr;
1982 ngx_http_ssi_var_t *var;
1983 ngx_http_ssi_ctx_t *mctx;
1984 ngx_http_ssi_block_t *bl;
1985 ngx_http_post_subrequest_t *psr;
1986
1987 uri = params[NGX_HTTP_SSI_INCLUDE_VIRTUAL];
1988 file = params[NGX_HTTP_SSI_INCLUDE_FILE];
1989 wait = params[NGX_HTTP_SSI_INCLUDE_WAIT];
1990 set = params[NGX_HTTP_SSI_INCLUDE_SET];
1991 stub = params[NGX_HTTP_SSI_INCLUDE_STUB];
1992
1993 if (uri && file) {
1994 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
1995 "inlcusion may be either virtual=\"%V\" or file=\"%V\"",
1996 uri, file);
1997 return NGX_HTTP_SSI_ERROR;
1998 }
1999
2000 if (uri == NULL && file == NULL) {
2001 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2002 "no parameter in \"include\" SSI command");
2003 return NGX_HTTP_SSI_ERROR;
2004 }
2005
2006 if (set && stub) {
2007 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2008 "\"set\" and \"stub\" cannot be used together "
2009 "in \"include\" SSI command");
2010 return NGX_HTTP_SSI_ERROR;
2011 }
2012
2013 if (wait) {
2014 if (uri == NULL) {
2015 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2016 "\"wait\" cannot be used with file=\"%V\"", file);
2017 return NGX_HTTP_SSI_ERROR;
2018 }
2019
2020 if (wait->len == 2
2021 && ngx_strncasecmp(wait->data, (u_char *) "no", 2) == 0)
2022 {
2023 wait = NULL;
2024
2025 } else if (wait->len != 3
2026 || ngx_strncasecmp(wait->data, (u_char *) "yes", 3) != 0)
2027 {
2028 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2029 "invalid value \"%V\" in the \"wait\" parameter",
2030 wait);
2031 return NGX_HTTP_SSI_ERROR;
2032 }
2033 }
2034
2035 if (uri == NULL) {
2036 uri = file;
2037 wait = (ngx_str_t *) -1;
2038 }
2039
2040 rc = ngx_http_ssi_evaluate_string(r, ctx, uri, NGX_HTTP_SSI_ADD_PREFIX);
2041
2042 if (rc != NGX_OK) {
2043 return rc;
2044 }
2045
2046 dst = uri->data;
2047 src = uri->data;
2048
2049 ngx_unescape_uri(&dst, &src, uri->len, NGX_UNESCAPE_URI);
2050
2051 len = (uri->data + uri->len) - src;
2052 if (len) {
2053 dst = ngx_movemem(dst, src, len);
2054 }
2055
2056 uri->len = dst - uri->data;
2057
2058 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2059 "ssi include: \"%V\"", uri);
2060
2061 ngx_str_null(&args);
2062 flags = NGX_HTTP_LOG_UNSAFE;
2063
2064 if (ngx_http_parse_unsafe_uri(r, uri, &args, &flags) != NGX_OK) {
2065 return NGX_HTTP_SSI_ERROR;
2066 }
2067
2068 psr = NULL;
2069
2070 mctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module);
2071
2072 if (stub) {
2073 if (mctx->blocks) {
2074 bl = mctx->blocks->elts;
2075 for (i = 0; i < mctx->blocks->nelts; i++) {
2076 if (stub->len == bl[i].name.len
2077 && ngx_strncmp(stub->data, bl[i].name.data, stub->len) == 0)
2078 {
2079 goto found;
2080 }
2081 }
2082 }
2083
2084 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2085 "\"stub\"=\"%V\" for \"include\" not found", stub);
2086 return NGX_HTTP_SSI_ERROR;
2087
2088 found:
2089
2090 psr = ngx_palloc(r->pool, sizeof(ngx_http_post_subrequest_t));
2091 if (psr == NULL) {
2092 return NGX_ERROR;
2093 }
2094
2095 psr->handler = ngx_http_ssi_stub_output;
2096
2097 if (bl[i].count++) {
2098
2099 out = NULL;
2100 ll = &out;
2101
2102 for (tl = bl[i].bufs; tl; tl = tl->next) {
2103
2104 if (ctx->free) {
2105 cl = ctx->free;
2106 ctx->free = ctx->free->next;
2107 b = cl->buf;
2108
2109 } else {
2110 b = ngx_alloc_buf(r->pool);
2111 if (b == NULL) {
2112 return NGX_ERROR;
2113 }
2114
2115 cl = ngx_alloc_chain_link(r->pool);
2116 if (cl == NULL) {
2117 return NGX_ERROR;
2118 }
2119
2120 cl->buf = b;
2121 }
2122
2123 ngx_memcpy(b, tl->buf, sizeof(ngx_buf_t));
2124
2125 b->pos = b->start;
2126
2127 *ll = cl;
2128 cl->next = NULL;
2129 ll = &cl->next;
2130 }
2131
2132 psr->data = out;
2133
2134 } else {
2135 psr->data = bl[i].bufs;
2136 }
2137 }
2138
2139 if (wait) {
2140 flags |= NGX_HTTP_SUBREQUEST_WAITED;
2141 }
2142
2143 if (set) {
2144 key = ngx_hash_strlow(set->data, set->data, set->len);
2145
2146 psr = ngx_palloc(r->pool, sizeof(ngx_http_post_subrequest_t));
2147 if (psr == NULL) {
2148 return NGX_ERROR;
2149 }
2150
2151 psr->handler = ngx_http_ssi_set_variable;
2152 psr->data = ngx_http_ssi_get_variable(r, set, key);
2153
2154 if (psr->data == NULL) {
2155
2156 if (mctx->variables == NULL) {
2157 mctx->variables = ngx_list_create(r->pool, 4,
2158 sizeof(ngx_http_ssi_var_t));
2159 if (mctx->variables == NULL) {
2160 return NGX_ERROR;
2161 }
2162 }
2163
2164 var = ngx_list_push(mctx->variables);
2165 if (var == NULL) {
2166 return NGX_ERROR;
2167 }
2168
2169 var->name = *set;
2170 var->key = key;
2171 var->value = ngx_http_ssi_null_string;
2172 psr->data = &var->value;
2173 }
2174
2175 flags |= NGX_HTTP_SUBREQUEST_IN_MEMORY|NGX_HTTP_SUBREQUEST_WAITED;
2176 }
2177
2178 if (ngx_http_subrequest(r, uri, &args, &sr, psr, flags) != NGX_OK) {
2179 return NGX_HTTP_SSI_ERROR;
2180 }
2181
2182 if (wait == NULL && set == NULL) {
2183 return NGX_OK;
2184 }
2185
2186 if (ctx->wait == NULL) {
2187 ctx->wait = sr;
2188
2189 return NGX_AGAIN;
2190
2191 } else {
2192 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2193 "can only wait for one subrequest at a time");
2194 }
2195
2196 return NGX_OK;
2197 }
2198
2199
2200 static ngx_int_t
2201 ngx_http_ssi_stub_output(ngx_http_request_t *r, void *data, ngx_int_t rc)
2202 {
2203 ngx_chain_t *out;
2204
2205 if (rc == NGX_ERROR || r->connection->error || r->request_output) {
2206 return rc;
2207 }
2208
2209 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2210 "ssi stub output: \"%V?%V\"", &r->uri, &r->args);
2211
2212 out = data;
2213
2214 if (!r->header_sent) {
2215 r->headers_out.content_type_len =
2216 r->parent->headers_out.content_type_len;
2217 r->headers_out.content_type = r->parent->headers_out.content_type;
2218
2219 if (ngx_http_send_header(r) == NGX_ERROR) {
2220 return NGX_ERROR;
2221 }
2222 }
2223
2224 return ngx_http_output_filter(r, out);
2225 }
2226
2227
2228 static ngx_int_t
2229 ngx_http_ssi_set_variable(ngx_http_request_t *r, void *data, ngx_int_t rc)
2230 {
2231 ngx_str_t *value = data;
2232
2233 if (r->upstream) {
2234 value->len = r->upstream->buffer.last - r->upstream->buffer.pos;
2235 value->data = r->upstream->buffer.pos;
2236 }
2237
2238 return rc;
2239 }
2240
2241
2242 static ngx_int_t
2243 ngx_http_ssi_echo(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2244 ngx_str_t **params)
2245 {
2246 u_char *p;
2247 uintptr_t len;
2248 ngx_int_t key;
2249 ngx_buf_t *b;
2250 ngx_str_t *var, *value, *enc, text;
2251 ngx_chain_t *cl;
2252 ngx_http_variable_value_t *vv;
2253
2254 var = params[NGX_HTTP_SSI_ECHO_VAR];
2255
2256 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2257 "ssi echo \"%V\"", var);
2258
2259 key = ngx_hash_strlow(var->data, var->data, var->len);
2260
2261 value = ngx_http_ssi_get_variable(r, var, key);
2262
2263 if (value == NULL) {
2264 vv = ngx_http_get_variable(r, var, key);
2265
2266 if (vv == NULL) {
2267 return NGX_HTTP_SSI_ERROR;
2268 }
2269
2270 if (!vv->not_found) {
2271 text.data = vv->data;
2272 text.len = vv->len;
2273 value = &text;
2274 }
2275 }
2276
2277 if (value == NULL) {
2278 value = params[NGX_HTTP_SSI_ECHO_DEFAULT];
2279
2280 if (value == NULL) {
2281 value = &ngx_http_ssi_none;
2282
2283 } else if (value->len == 0) {
2284 return NGX_OK;
2285 }
2286
2287 } else {
2288 if (value->len == 0) {
2289 return NGX_OK;
2290 }
2291 }
2292
2293 enc = params[NGX_HTTP_SSI_ECHO_ENCODING];
2294
2295 if (enc) {
2296 if (enc->len == 4 && ngx_strncmp(enc->data, "none", 4) == 0) {
2297
2298 ctx->encoding = NGX_HTTP_SSI_NO_ENCODING;
2299
2300 } else if (enc->len == 3 && ngx_strncmp(enc->data, "url", 3) == 0) {
2301
2302 ctx->encoding = NGX_HTTP_SSI_URL_ENCODING;
2303
2304 } else if (enc->len == 6 && ngx_strncmp(enc->data, "entity", 6) == 0) {
2305
2306 ctx->encoding = NGX_HTTP_SSI_ENTITY_ENCODING;
2307
2308 } else {
2309 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2310 "unknown encoding \"%V\" in the \"echo\" command",
2311 enc);
2312 }
2313 }
2314
2315 p = value->data;
2316
2317 switch (ctx->encoding) {
2318
2319 case NGX_HTTP_SSI_URL_ENCODING:
2320 len = 2 * ngx_escape_uri(NULL, value->data, value->len,
2321 NGX_ESCAPE_HTML);
2322
2323 if (len) {
2324 p = ngx_pnalloc(r->pool, value->len + len);
2325 if (p == NULL) {
2326 return NGX_HTTP_SSI_ERROR;
2327 }
2328
2329 (void) ngx_escape_uri(p, value->data, value->len, NGX_ESCAPE_HTML);
2330 }
2331
2332 len += value->len;
2333 break;
2334
2335 case NGX_HTTP_SSI_ENTITY_ENCODING:
2336 len = ngx_escape_html(NULL, value->data, value->len);
2337
2338 if (len) {
2339 p = ngx_pnalloc(r->pool, value->len + len);
2340 if (p == NULL) {
2341 return NGX_HTTP_SSI_ERROR;
2342 }
2343
2344 (void) ngx_escape_html(p, value->data, value->len);
2345 }
2346
2347 len += value->len;
2348 break;
2349
2350 default: /* NGX_HTTP_SSI_NO_ENCODING */
2351 len = value->len;
2352 break;
2353 }
2354
2355 b = ngx_calloc_buf(r->pool);
2356 if (b == NULL) {
2357 return NGX_HTTP_SSI_ERROR;
2358 }
2359
2360 cl = ngx_alloc_chain_link(r->pool);
2361 if (cl == NULL) {
2362 return NGX_HTTP_SSI_ERROR;
2363 }
2364
2365 b->memory = 1;
2366 b->pos = p;
2367 b->last = p + len;
2368
2369 cl->buf = b;
2370 cl->next = NULL;
2371 *ctx->last_out = cl;
2372 ctx->last_out = &cl->next;
2373
2374 return NGX_OK;
2375 }
2376
2377
2378 static ngx_int_t
2379 ngx_http_ssi_config(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2380 ngx_str_t **params)
2381 {
2382 ngx_str_t *value;
2383
2384 value = params[NGX_HTTP_SSI_CONFIG_TIMEFMT];
2385
2386 if (value) {
2387 ctx->timefmt.len = value->len;
2388 ctx->timefmt.data = ngx_pnalloc(r->pool, value->len + 1);
2389 if (ctx->timefmt.data == NULL) {
2390 return NGX_HTTP_SSI_ERROR;
2391 }
2392
2393 ngx_cpystrn(ctx->timefmt.data, value->data, value->len + 1);
2394 }
2395
2396 value = params[NGX_HTTP_SSI_CONFIG_ERRMSG];
2397
2398 if (value) {
2399 ctx->errmsg = *value;
2400 }
2401
2402 return NGX_OK;
2403 }
2404
2405
2406 static ngx_int_t
2407 ngx_http_ssi_set(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2408 ngx_str_t **params)
2409 {
2410 ngx_int_t key, rc;
2411 ngx_str_t *name, *value, *vv;
2412 ngx_http_ssi_var_t *var;
2413 ngx_http_ssi_ctx_t *mctx;
2414
2415 mctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module);
2416
2417 if (mctx->variables == NULL) {
2418 mctx->variables = ngx_list_create(r->pool, 4,
2419 sizeof(ngx_http_ssi_var_t));
2420 if (mctx->variables == NULL) {
2421 return NGX_ERROR;
2422 }
2423 }
2424
2425 name = params[NGX_HTTP_SSI_SET_VAR];
2426 value = params[NGX_HTTP_SSI_SET_VALUE];
2427
2428 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2429 "ssi set \"%V\" \"%V\"", name, value);
2430
2431 rc = ngx_http_ssi_evaluate_string(r, ctx, value, 0);
2432
2433 if (rc != NGX_OK) {
2434 return rc;
2435 }
2436
2437 key = ngx_hash_strlow(name->data, name->data, name->len);
2438
2439 vv = ngx_http_ssi_get_variable(r, name, key);
2440
2441 if (vv) {
2442 *vv = *value;
2443 return NGX_OK;
2444 }
2445
2446 var = ngx_list_push(mctx->variables);
2447 if (var == NULL) {
2448 return NGX_ERROR;
2449 }
2450
2451 var->name = *name;
2452 var->key = key;
2453 var->value = *value;
2454
2455 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2456 "set: \"%V\"=\"%V\"", name, value);
2457
2458 return NGX_OK;
2459 }
2460
2461
2462 static ngx_int_t
2463 ngx_http_ssi_if(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2464 ngx_str_t **params)
2465 {
2466 u_char *p, *last;
2467 ngx_str_t *expr, left, right;
2468 ngx_int_t rc;
2469 ngx_uint_t negative, noregex, flags;
2470
2471 if (ctx->command.len == 2) {
2472 if (ctx->conditional) {
2473 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2474 "the \"if\" command inside the \"if\" command");
2475 return NGX_HTTP_SSI_ERROR;
2476 }
2477 }
2478
2479 if (ctx->output_chosen) {
2480 ctx->output = 0;
2481 return NGX_OK;
2482 }
2483
2484 expr = params[NGX_HTTP_SSI_IF_EXPR];
2485
2486 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2487 "ssi if expr=\"%V\"", expr);
2488
2489 left.data = expr->data;
2490 last = expr->data + expr->len;
2491
2492 for (p = left.data; p < last; p++) {
2493 if (*p >= 'A' && *p <= 'Z') {
2494 *p |= 0x20;
2495 continue;
2496 }
2497
2498 if ((*p >= 'a' && *p <= 'z')
2499 || (*p >= '0' && *p <= '9')
2500 || *p == '$' || *p == '{' || *p == '}' || *p == '_'
2501 || *p == '"' || *p == '\'')
2502 {
2503 continue;
2504 }
2505
2506 break;
2507 }
2508
2509 left.len = p - left.data;
2510
2511 while (p < last && *p == ' ') {
2512 p++;
2513 }
2514
2515 flags = 0;
2516
2517 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2518 "left: \"%V\"", &left);
2519
2520 rc = ngx_http_ssi_evaluate_string(r, ctx, &left, flags);
2521
2522 if (rc != NGX_OK) {
2523 return rc;
2524 }
2525
2526 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2527 "evaluted left: \"%V\"", &left);
2528
2529 if (p == last) {
2530 if (left.len) {
2531 ctx->output = 1;
2532 ctx->output_chosen = 1;
2533
2534 } else {
2535 ctx->output = 0;
2536 }
2537
2538 ctx->conditional = NGX_HTTP_SSI_COND_IF;
2539
2540 return NGX_OK;
2541 }
2542
2543 if (p < last && *p == '=') {
2544 negative = 0;
2545 p++;
2546
2547 } else if (p + 1 < last && *p == '!' && *(p + 1) == '=') {
2548 negative = 1;
2549 p += 2;
2550
2551 } else {
2552 goto invalid_expression;
2553 }
2554
2555 while (p < last && *p == ' ') {
2556 p++;
2557 }
2558
2559 if (p < last - 1 && *p == '/') {
2560 if (*(last - 1) != '/') {
2561 goto invalid_expression;
2562 }
2563
2564 noregex = 0;
2565 flags = NGX_HTTP_SSI_ADD_ZERO;
2566 last--;
2567 p++;
2568
2569 } else {
2570 noregex = 1;
2571 flags = 0;
2572
2573 if (p < last - 1 && p[0] == '\\' && p[1] == '/') {
2574 p++;
2575 }
2576 }
2577
2578 right.len = last - p;
2579 right.data = p;
2580
2581 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2582 "right: \"%V\"", &right);
2583
2584 rc = ngx_http_ssi_evaluate_string(r, ctx, &right, flags);
2585
2586 if (rc != NGX_OK) {
2587 return rc;
2588 }
2589
2590 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2591 "evaluted right: \"%V\"", &right);
2592
2593 if (noregex) {
2594 if (left.len != right.len) {
2595 rc = -1;
2596
2597 } else {
2598 rc = ngx_strncmp(left.data, right.data, right.len);
2599 }
2600
2601 } else {
2602 right.data[right.len] = '\0';
2603
2604 rc = ngx_http_ssi_regex_match(r, &right, &left);
2605
2606 if (rc == NGX_OK) {
2607 rc = 0;
2608 } else if (rc == NGX_DECLINED) {
2609 rc = -1;
2610 } else {
2611 return rc;
2612 }
2613 }
2614
2615 if ((rc == 0 && !negative) || (rc != 0 && negative)) {
2616 ctx->output = 1;
2617 ctx->output_chosen = 1;
2618
2619 } else {
2620 ctx->output = 0;
2621 }
2622
2623 ctx->conditional = NGX_HTTP_SSI_COND_IF;
2624
2625 return NGX_OK;
2626
2627 invalid_expression:
2628
2629 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
2630 "invalid expression in \"%V\"", expr);
2631
2632 return NGX_HTTP_SSI_ERROR;
2633 }
2634
2635
2636 static ngx_int_t
2637 ngx_http_ssi_else(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2638 ngx_str_t **params)
2639 {
2640 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2641 "ssi else");
2642
2643 if (ctx->output_chosen) {
2644 ctx->output = 0;
2645 } else {
2646 ctx->output = 1;
2647 }
2648
2649 ctx->conditional = NGX_HTTP_SSI_COND_ELSE;
2650
2651 return NGX_OK;
2652 }
2653
2654
2655 static ngx_int_t
2656 ngx_http_ssi_endif(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2657 ngx_str_t **params)
2658 {
2659 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2660 "ssi endif");
2661
2662 ctx->output = 1;
2663 ctx->output_chosen = 0;
2664 ctx->conditional = 0;
2665
2666 return NGX_OK;
2667 }
2668
2669
2670 static ngx_int_t
2671 ngx_http_ssi_block(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2672 ngx_str_t **params)
2673 {
2674 ngx_http_ssi_ctx_t *mctx;
2675 ngx_http_ssi_block_t *bl;
2676
2677 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2678 "ssi block");
2679
2680 mctx = ngx_http_get_module_ctx(r->main, ngx_http_ssi_filter_module);
2681
2682 if (mctx->blocks == NULL) {
2683 mctx->blocks = ngx_array_create(r->pool, 4,
2684 sizeof(ngx_http_ssi_block_t));
2685 if (mctx->blocks == NULL) {
2686 return NGX_HTTP_SSI_ERROR;
2687 }
2688 }
2689
2690 bl = ngx_array_push(mctx->blocks);
2691 if (bl == NULL) {
2692 return NGX_HTTP_SSI_ERROR;
2693 }
2694
2695 bl->name = *params[NGX_HTTP_SSI_BLOCK_NAME];
2696 bl->bufs = NULL;
2697 bl->count = 0;
2698
2699 ctx->output = 0;
2700 ctx->block = 1;
2701
2702 return NGX_OK;
2703 }
2704
2705
2706 static ngx_int_t
2707 ngx_http_ssi_endblock(ngx_http_request_t *r, ngx_http_ssi_ctx_t *ctx,
2708 ngx_str_t **params)
2709 {
2710 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
2711 "ssi endblock");
2712
2713 ctx->output = 1;
2714 ctx->block = 0;
2715
2716 return NGX_OK;
2717 }
2718
2719
2720 static ngx_int_t
2721 ngx_http_ssi_date_gmt_local_variable(ngx_http_request_t *r,
2722 ngx_http_variable_value_t *v, uintptr_t gmt)
2723 {
2724 ngx_http_ssi_ctx_t *ctx;
2725 ngx_time_t *tp;
2726 struct tm tm;
2727 char buf[NGX_HTTP_SSI_DATE_LEN];
2728
2729 v->valid = 1;
2730 v->no_cacheable = 0;
2731 v->not_found = 0;
2732
2733 tp = ngx_timeofday();
2734
2735 ctx = ngx_http_get_module_ctx(r, ngx_http_ssi_filter_module);
2736
2737 if (ctx == NULL
2738 || (ctx->timefmt.len == sizeof("%s") - 1
2739 && ctx->timefmt.data[0] == '%' && ctx->timefmt.data[1] == 's'))
2740 {
2741 v->data = ngx_pnalloc(r->pool, NGX_TIME_T_LEN);
2742 if (v->data == NULL) {
2743 return NGX_ERROR;
2744 }
2745
2746 v->len = ngx_sprintf(v->data, "%T", tp->sec) - v->data;
2747
2748 return NGX_OK;
2749 }
2750
2751 if (gmt) {
2752 ngx_libc_gmtime(tp->sec, &tm);
2753 } else {
2754 ngx_libc_localtime(tp->sec, &tm);
2755 }
2756
2757 v->len = strftime(buf, NGX_HTTP_SSI_DATE_LEN,
2758 (char *) ctx->timefmt.data, &tm);
2759 if (v->len == 0) {
2760 return NGX_ERROR;
2761 }
2762
2763 v->data = ngx_pnalloc(r->pool, v->len);
2764 if (v->data == NULL) {
2765 return NGX_ERROR;
2766 }
2767
2768 ngx_memcpy(v->data, buf, v->len);
2769
2770 return NGX_OK;
2771 }
2772
2773
2774 static ngx_int_t
2775 ngx_http_ssi_preconfiguration(ngx_conf_t *cf)
2776 {
2777 ngx_int_t rc;
2778 ngx_http_variable_t *var, *v;
2779 ngx_http_ssi_command_t *cmd;
2780 ngx_http_ssi_main_conf_t *smcf;
2781
2782 for (v = ngx_http_ssi_vars; v->name.len; v++) {
2783 var = ngx_http_add_variable(cf, &v->name, v->flags);
2784 if (var == NULL) {
2785 return NGX_ERROR;
2786 }
2787
2788 var->get_handler = v->get_handler;
2789 var->data = v->data;
2790 }
2791
2792 smcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_ssi_filter_module);
2793
2794 for (cmd = ngx_http_ssi_commands; cmd->name.len; cmd++) {
2795 rc = ngx_hash_add_key(&smcf->commands, &cmd->name, cmd,
2796 NGX_HASH_READONLY_KEY);
2797
2798 if (rc == NGX_OK) {
2799 continue;
2800 }
2801
2802 if (rc == NGX_BUSY) {
2803 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
2804 "conflicting SSI command \"%V\"", &cmd->name);
2805 }
2806
2807 return NGX_ERROR;
2808 }
2809
2810 return NGX_OK;
2811 }
2812
2813
2814 static void *
2815 ngx_http_ssi_create_main_conf(ngx_conf_t *cf)
2816 {
2817 ngx_http_ssi_main_conf_t *smcf;
2818
2819 smcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_main_conf_t));
2820 if (smcf == NULL) {
2821 return NULL;
2822 }
2823
2824 smcf->commands.pool = cf->pool;
2825 smcf->commands.temp_pool = cf->temp_pool;
2826
2827 if (ngx_hash_keys_array_init(&smcf->commands, NGX_HASH_SMALL) != NGX_OK) {
2828 return NULL;
2829 }
2830
2831 return smcf;
2832 }
2833
2834
2835 static char *
2836 ngx_http_ssi_init_main_conf(ngx_conf_t *cf, void *conf)
2837 {
2838 ngx_http_ssi_main_conf_t *smcf = conf;
2839
2840 ngx_hash_init_t hash;
2841
2842 hash.hash = &smcf->hash;
2843 hash.key = ngx_hash_key;
2844 hash.max_size = 1024;
2845 hash.bucket_size = ngx_cacheline_size;
2846 hash.name = "ssi_command_hash";
2847 hash.pool = cf->pool;
2848 hash.temp_pool = NULL;
2849
2850 if (ngx_hash_init(&hash, smcf->commands.keys.elts,
2851 smcf->commands.keys.nelts)
2852 != NGX_OK)
2853 {
2854 return NGX_CONF_ERROR;
2855 }
2856
2857 return NGX_CONF_OK;
2858 }
2859
2860
2861 static void *
2862 ngx_http_ssi_create_loc_conf(ngx_conf_t *cf)
2863 {
2864 ngx_http_ssi_loc_conf_t *slcf;
2865
2866 slcf = ngx_pcalloc(cf->pool, sizeof(ngx_http_ssi_loc_conf_t));
2867 if (slcf == NULL) {
2868 return NULL;
2869 }
2870
2871 /*
2872 * set by ngx_pcalloc():
2873 *
2874 * conf->types = { NULL };
2875 * conf->types_keys = NULL;
2876 */
2877
2878 slcf->enable = NGX_CONF_UNSET;
2879 slcf->silent_errors = NGX_CONF_UNSET;
2880 slcf->ignore_recycled_buffers = NGX_CONF_UNSET;
2881
2882 slcf->min_file_chunk = NGX_CONF_UNSET_SIZE;
2883 slcf->value_len = NGX_CONF_UNSET_SIZE;
2884
2885 return slcf;
2886 }
2887
2888
2889 static char *
2890 ngx_http_ssi_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
2891 {
2892 ngx_http_ssi_loc_conf_t *prev = parent;
2893 ngx_http_ssi_loc_conf_t *conf = child;
2894
2895 ngx_conf_merge_value(conf->enable, prev->enable, 0);
2896 ngx_conf_merge_value(conf->silent_errors, prev->silent_errors, 0);
2897 ngx_conf_merge_value(conf->ignore_recycled_buffers,
2898 prev->ignore_recycled_buffers, 0);
2899
2900 ngx_conf_merge_size_value(conf->min_file_chunk, prev->min_file_chunk, 1024);
2901 ngx_conf_merge_size_value(conf->value_len, prev->value_len, 255);
2902
2903 if (ngx_http_merge_types(cf, &conf->types_keys, &conf->types,
2904 &prev->types_keys, &prev->types,
2905 ngx_http_html_default_types)
2906 != NGX_OK)
2907 {
2908 return NGX_CONF_ERROR;
2909 }
2910
2911 return NGX_CONF_OK;
2912 }
2913
2914
2915 static ngx_int_t
2916 ngx_http_ssi_filter_init(ngx_conf_t *cf)
2917 {
2918 ngx_http_next_header_filter = ngx_http_top_header_filter;
2919 ngx_http_top_header_filter = ngx_http_ssi_header_filter;
2920
2921 ngx_http_next_body_filter = ngx_http_top_body_filter;
2922 ngx_http_top_body_filter = ngx_http_ssi_body_filter;
2923
2924 return NGX_OK;
2925 }
Tomato firmware and modifications.