1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | https://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Original design: Shane Caraveo <shane@caraveo.com> |
14 | Authors: Andi Gutmans <andi@php.net> |
15 | Zeev Suraski <zeev@php.net> |
16 +----------------------------------------------------------------------+
17 */
18
19 #include <ctype.h>
20 #include <sys/stat.h>
21
22 #include "php.h"
23 #include "SAPI.h"
24 #include "php_variables.h"
25 #include "php_ini.h"
26 #include "ext/standard/php_string.h"
27 #include "ext/standard/pageinfo.h"
28 #include "ext/pcre/php_pcre.h"
29 #ifdef ZTS
30 #include "TSRM.h"
31 #endif
32 #ifdef HAVE_SYS_TIME_H
33 #include <sys/time.h>
34 #elif defined(PHP_WIN32)
35 #include "win32/time.h"
36 #endif
37
38 #include "rfc1867.h"
39
40 #include "php_content_types.h"
41
42 #ifdef ZTS
43 SAPI_API int sapi_globals_id;
44 SAPI_API size_t sapi_globals_offset;
45 #else
46 sapi_globals_struct sapi_globals;
47 #endif
48
_type_dtor(zval * zv)49 static void _type_dtor(zval *zv)
50 {
51 free(Z_PTR_P(zv));
52 }
53
sapi_globals_ctor(sapi_globals_struct * sapi_globals)54 static void sapi_globals_ctor(sapi_globals_struct *sapi_globals)
55 {
56 memset(sapi_globals, 0, sizeof(*sapi_globals));
57 zend_hash_init(&sapi_globals->known_post_content_types, 8, NULL, _type_dtor, 1);
58 php_setup_sapi_content_types();
59 }
60
sapi_globals_dtor(sapi_globals_struct * sapi_globals)61 static void sapi_globals_dtor(sapi_globals_struct *sapi_globals)
62 {
63 zend_hash_destroy(&sapi_globals->known_post_content_types);
64 }
65
66 /* True globals (no need for thread safety) */
67 SAPI_API sapi_module_struct sapi_module;
68
69
sapi_startup(sapi_module_struct * sf)70 SAPI_API void sapi_startup(sapi_module_struct *sf)
71 {
72 sf->ini_entries = NULL;
73 sapi_module = *sf;
74
75 #ifdef ZTS
76 ts_allocate_fast_id(&sapi_globals_id, &sapi_globals_offset, sizeof(sapi_globals_struct), (ts_allocate_ctor) sapi_globals_ctor, (ts_allocate_dtor) sapi_globals_dtor);
77 # ifdef PHP_WIN32
78 _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
79 # endif
80 #else
81 sapi_globals_ctor(&sapi_globals);
82 #endif
83
84 #ifdef PHP_WIN32
85 tsrm_win32_startup();
86 #endif
87
88 reentrancy_startup();
89 }
90
sapi_shutdown(void)91 SAPI_API void sapi_shutdown(void)
92 {
93 #ifdef ZTS
94 ts_free_id(sapi_globals_id);
95 #else
96 sapi_globals_dtor(&sapi_globals);
97 #endif
98
99 reentrancy_shutdown();
100
101 #ifdef PHP_WIN32
102 tsrm_win32_shutdown();
103 #endif
104 }
105
106
sapi_free_header(sapi_header_struct * sapi_header)107 SAPI_API void sapi_free_header(sapi_header_struct *sapi_header)
108 {
109 efree(sapi_header->header);
110 }
111
112 /* {{{ call a header function */
PHP_FUNCTION(header_register_callback)113 PHP_FUNCTION(header_register_callback)
114 {
115 zend_fcall_info fci;
116 zend_fcall_info_cache fcc;
117
118 if (zend_parse_parameters(ZEND_NUM_ARGS(), "f", &fci, &fcc) == FAILURE) {
119 RETURN_THROWS();
120 }
121
122 if (Z_TYPE(SG(callback_func)) != IS_UNDEF) {
123 zval_ptr_dtor(&SG(callback_func));
124 SG(fci_cache) = empty_fcall_info_cache;
125 }
126
127 /* Don't store callback if headers have already been sent:
128 * It won't get used and we won't have a chance to release it. */
129 if (!SG(headers_sent)) {
130 ZVAL_COPY(&SG(callback_func), &fci.function_name);
131 }
132
133 RETURN_TRUE;
134 }
135 /* }}} */
136
sapi_run_header_callback(zval * callback)137 static void sapi_run_header_callback(zval *callback)
138 {
139 int error;
140 zend_fcall_info fci;
141 char *callback_error = NULL;
142 zval retval;
143
144 if (zend_fcall_info_init(callback, 0, &fci, &SG(fci_cache), NULL, &callback_error) == SUCCESS) {
145 fci.retval = &retval;
146
147 error = zend_call_function(&fci, &SG(fci_cache));
148 if (error == FAILURE) {
149 goto callback_failed;
150 } else {
151 zval_ptr_dtor(&retval);
152 }
153 } else {
154 callback_failed:
155 php_error_docref(NULL, E_WARNING, "Could not call the sapi_header_callback");
156 }
157
158 if (callback_error) {
159 efree(callback_error);
160 }
161 }
162
sapi_handle_post(void * arg)163 SAPI_API void sapi_handle_post(void *arg)
164 {
165 if (SG(request_info).post_entry && SG(request_info).content_type_dup) {
166 SG(request_info).post_entry->post_handler(SG(request_info).content_type_dup, arg);
167 efree(SG(request_info).content_type_dup);
168 SG(request_info).content_type_dup = NULL;
169 }
170 }
171
sapi_read_post_data(void)172 static void sapi_read_post_data(void)
173 {
174 sapi_post_entry *post_entry;
175 uint32_t content_type_length = (uint32_t)strlen(SG(request_info).content_type);
176 char *content_type = estrndup(SG(request_info).content_type, content_type_length);
177 char *p;
178 char oldchar=0;
179 void (*post_reader_func)(void) = NULL;
180
181
182 /* dedicated implementation for increased performance:
183 * - Make the content type lowercase
184 * - Trim descriptive data, stay with the content-type only
185 */
186 for (p=content_type; p<content_type+content_type_length; p++) {
187 switch (*p) {
188 case ';':
189 case ',':
190 case ' ':
191 content_type_length = p-content_type;
192 oldchar = *p;
193 *p = 0;
194 break;
195 default:
196 *p = tolower(*p);
197 break;
198 }
199 }
200
201 /* now try to find an appropriate POST content handler */
202 if ((post_entry = zend_hash_str_find_ptr(&SG(known_post_content_types), content_type,
203 content_type_length)) != NULL) {
204 /* found one, register it for use */
205 SG(request_info).post_entry = post_entry;
206 post_reader_func = post_entry->post_reader;
207 } else {
208 /* fallback */
209 SG(request_info).post_entry = NULL;
210 if (!sapi_module.default_post_reader) {
211 /* no default reader ? */
212 SG(request_info).content_type_dup = NULL;
213 sapi_module.sapi_error(E_WARNING, "Unsupported content type: '%s'", content_type);
214 return;
215 }
216 }
217 if (oldchar) {
218 *(p-1) = oldchar;
219 }
220
221 SG(request_info).content_type_dup = content_type;
222
223 if(post_reader_func) {
224 post_reader_func();
225 }
226
227 if(sapi_module.default_post_reader) {
228 sapi_module.default_post_reader();
229 }
230 }
231
sapi_read_post_block(char * buffer,size_t buflen)232 SAPI_API size_t sapi_read_post_block(char *buffer, size_t buflen)
233 {
234 size_t read_bytes;
235
236 if (!sapi_module.read_post) {
237 return 0;
238 }
239
240 read_bytes = sapi_module.read_post(buffer, buflen);
241
242 if (read_bytes > 0) {
243 /* gogo */
244 SG(read_post_bytes) += read_bytes;
245 }
246 if (read_bytes < buflen) {
247 /* done */
248 SG(post_read) = 1;
249 }
250
251 return read_bytes;
252 }
253
SAPI_POST_READER_FUNC(sapi_read_standard_form_data)254 SAPI_API SAPI_POST_READER_FUNC(sapi_read_standard_form_data)
255 {
256 if ((SG(post_max_size) > 0) && (SG(request_info).content_length > SG(post_max_size))) {
257 php_error_docref(NULL, E_WARNING, "POST Content-Length of " ZEND_LONG_FMT " bytes exceeds the limit of " ZEND_LONG_FMT " bytes",
258 SG(request_info).content_length, SG(post_max_size));
259 return;
260 }
261
262
263 SG(request_info).request_body = php_stream_temp_create_ex(TEMP_STREAM_DEFAULT, SAPI_POST_BLOCK_SIZE, PG(upload_tmp_dir));
264
265 if (sapi_module.read_post) {
266 size_t read_bytes;
267
268 for (;;) {
269 char buffer[SAPI_POST_BLOCK_SIZE];
270
271 read_bytes = sapi_read_post_block(buffer, SAPI_POST_BLOCK_SIZE);
272
273 if (read_bytes > 0) {
274 if (php_stream_write(SG(request_info).request_body, buffer, read_bytes) != read_bytes) {
275 /* if parts of the stream can't be written, purge it completely */
276 php_stream_truncate_set_size(SG(request_info).request_body, 0);
277 php_error_docref(NULL, E_WARNING, "POST data can't be buffered; all data discarded");
278 break;
279 }
280 }
281
282 if ((SG(post_max_size) > 0) && (SG(read_post_bytes) > SG(post_max_size))) {
283 php_error_docref(NULL, E_WARNING, "Actual POST length does not match Content-Length, and exceeds " ZEND_LONG_FMT " bytes", SG(post_max_size));
284 break;
285 }
286
287 if (read_bytes < SAPI_POST_BLOCK_SIZE) {
288 /* done */
289 break;
290 }
291 }
292 php_stream_rewind(SG(request_info).request_body);
293 }
294 }
295
296
get_default_content_type(uint32_t prefix_len,uint32_t * len)297 static inline char *get_default_content_type(uint32_t prefix_len, uint32_t *len)
298 {
299 char *mimetype, *charset, *content_type;
300 uint32_t mimetype_len, charset_len;
301
302 if (SG(default_mimetype)) {
303 mimetype = SG(default_mimetype);
304 mimetype_len = (uint32_t)strlen(SG(default_mimetype));
305 } else {
306 mimetype = SAPI_DEFAULT_MIMETYPE;
307 mimetype_len = sizeof(SAPI_DEFAULT_MIMETYPE) - 1;
308 }
309 if (SG(default_charset)) {
310 charset = SG(default_charset);
311 charset_len = (uint32_t)strlen(SG(default_charset));
312 } else {
313 charset = SAPI_DEFAULT_CHARSET;
314 charset_len = sizeof(SAPI_DEFAULT_CHARSET) - 1;
315 }
316
317 if (*charset && strncasecmp(mimetype, "text/", 5) == 0) {
318 char *p;
319
320 *len = prefix_len + mimetype_len + sizeof("; charset=") - 1 + charset_len;
321 content_type = (char*)emalloc(*len + 1);
322 p = content_type + prefix_len;
323 memcpy(p, mimetype, mimetype_len);
324 p += mimetype_len;
325 memcpy(p, "; charset=", sizeof("; charset=") - 1);
326 p += sizeof("; charset=") - 1;
327 memcpy(p, charset, charset_len + 1);
328 } else {
329 *len = prefix_len + mimetype_len;
330 content_type = (char*)emalloc(*len + 1);
331 memcpy(content_type + prefix_len, mimetype, mimetype_len + 1);
332 }
333 return content_type;
334 }
335
336
sapi_get_default_content_type(void)337 SAPI_API char *sapi_get_default_content_type(void)
338 {
339 uint32_t len;
340
341 return get_default_content_type(0, &len);
342 }
343
344
sapi_get_default_content_type_header(sapi_header_struct * default_header)345 SAPI_API void sapi_get_default_content_type_header(sapi_header_struct *default_header)
346 {
347 uint32_t len;
348
349 default_header->header = get_default_content_type(sizeof("Content-type: ")-1, &len);
350 default_header->header_len = len;
351 memcpy(default_header->header, "Content-type: ", sizeof("Content-type: ") - 1);
352 }
353
354 /*
355 * Add charset on content-type header if the MIME type starts with
356 * "text/", the default_charset directive is not empty and
357 * there is not already a charset option in there.
358 *
359 * If "mimetype" is non-NULL, it should point to a pointer allocated
360 * with emalloc(). If a charset is added, the string will be
361 * re-allocated and the new length is returned. If mimetype is
362 * unchanged, 0 is returned.
363 *
364 */
sapi_apply_default_charset(char ** mimetype,size_t len)365 SAPI_API size_t sapi_apply_default_charset(char **mimetype, size_t len)
366 {
367 char *charset, *newtype;
368 size_t newlen;
369 charset = SG(default_charset) ? SG(default_charset) : SAPI_DEFAULT_CHARSET;
370
371 if (*mimetype != NULL) {
372 if (*charset && strncmp(*mimetype, "text/", 5) == 0 && strstr(*mimetype, "charset=") == NULL) {
373 newlen = len + (sizeof(";charset=")-1) + strlen(charset);
374 newtype = emalloc(newlen + 1);
375 PHP_STRLCPY(newtype, *mimetype, newlen + 1, len);
376 strlcat(newtype, ";charset=", newlen + 1);
377 strlcat(newtype, charset, newlen + 1);
378 efree(*mimetype);
379 *mimetype = newtype;
380 return newlen;
381 }
382 }
383 return 0;
384 }
385
sapi_activate_headers_only(void)386 SAPI_API void sapi_activate_headers_only(void)
387 {
388 if (SG(request_info).headers_read == 1)
389 return;
390 SG(request_info).headers_read = 1;
391 zend_llist_init(&SG(sapi_headers).headers, sizeof(sapi_header_struct),
392 (void (*)(void *)) sapi_free_header, 0);
393 SG(sapi_headers).send_default_content_type = 1;
394
395 /* SG(sapi_headers).http_response_code = 200; */
396 SG(sapi_headers).http_status_line = NULL;
397 SG(sapi_headers).mimetype = NULL;
398 SG(read_post_bytes) = 0;
399 SG(request_info).request_body = NULL;
400 SG(request_info).current_user = NULL;
401 SG(request_info).current_user_length = 0;
402 SG(request_info).no_headers = 0;
403 SG(request_info).post_entry = NULL;
404 SG(global_request_time) = 0;
405
406 /*
407 * It's possible to override this general case in the activate() callback,
408 * if necessary.
409 */
410 if (SG(request_info).request_method && !strcmp(SG(request_info).request_method, "HEAD")) {
411 SG(request_info).headers_only = 1;
412 } else {
413 SG(request_info).headers_only = 0;
414 }
415 if (SG(server_context)) {
416 SG(request_info).cookie_data = sapi_module.read_cookies();
417 if (sapi_module.activate) {
418 sapi_module.activate();
419 }
420 }
421 if (sapi_module.input_filter_init ) {
422 sapi_module.input_filter_init();
423 }
424 }
425
426 /*
427 * Called from php_request_startup() for every request.
428 */
429
sapi_activate(void)430 SAPI_API void sapi_activate(void)
431 {
432 zend_llist_init(&SG(sapi_headers).headers, sizeof(sapi_header_struct), (void (*)(void *)) sapi_free_header, 0);
433 SG(sapi_headers).send_default_content_type = 1;
434
435 /*
436 SG(sapi_headers).http_response_code = 200;
437 */
438 SG(sapi_headers).http_status_line = NULL;
439 SG(sapi_headers).mimetype = NULL;
440 SG(headers_sent) = 0;
441 ZVAL_UNDEF(&SG(callback_func));
442 SG(read_post_bytes) = 0;
443 SG(request_info).request_body = NULL;
444 SG(request_info).current_user = NULL;
445 SG(request_info).current_user_length = 0;
446 SG(request_info).no_headers = 0;
447 SG(request_info).post_entry = NULL;
448 SG(request_info).proto_num = 1000; /* Default to HTTP 1.0 */
449 SG(global_request_time) = 0;
450 SG(post_read) = 0;
451 /* It's possible to override this general case in the activate() callback, if necessary. */
452 if (SG(request_info).request_method && !strcmp(SG(request_info).request_method, "HEAD")) {
453 SG(request_info).headers_only = 1;
454 } else {
455 SG(request_info).headers_only = 0;
456 }
457 SG(rfc1867_uploaded_files) = NULL;
458
459 /* Handle request method */
460 if (SG(server_context)) {
461 if (PG(enable_post_data_reading)
462 && SG(request_info).content_type
463 && SG(request_info).request_method
464 && !strcmp(SG(request_info).request_method, "POST")) {
465 /* HTTP POST may contain form data to be processed into variables
466 * depending on given content type */
467 sapi_read_post_data();
468 } else {
469 SG(request_info).content_type_dup = NULL;
470 }
471
472 /* Cookies */
473 SG(request_info).cookie_data = sapi_module.read_cookies();
474 }
475 if (sapi_module.activate) {
476 sapi_module.activate();
477 }
478 if (sapi_module.input_filter_init) {
479 sapi_module.input_filter_init();
480 }
481 }
482
483
sapi_send_headers_free(void)484 static void sapi_send_headers_free(void)
485 {
486 if (SG(sapi_headers).http_status_line) {
487 efree(SG(sapi_headers).http_status_line);
488 SG(sapi_headers).http_status_line = NULL;
489 }
490 }
491
sapi_deactivate_module(void)492 SAPI_API void sapi_deactivate_module(void)
493 {
494 zend_llist_destroy(&SG(sapi_headers).headers);
495 if (SG(request_info).request_body) {
496 SG(request_info).request_body = NULL;
497 } else if (SG(server_context)) {
498 if (!SG(post_read)) {
499 /* make sure we've consumed all request input data */
500 char dummy[SAPI_POST_BLOCK_SIZE];
501 size_t read_bytes;
502
503 do {
504 read_bytes = sapi_read_post_block(dummy, SAPI_POST_BLOCK_SIZE);
505 } while (SAPI_POST_BLOCK_SIZE == read_bytes);
506 }
507 }
508 if (SG(request_info).auth_user) {
509 efree(SG(request_info).auth_user);
510 }
511 if (SG(request_info).auth_password) {
512 efree(SG(request_info).auth_password);
513 }
514 if (SG(request_info).auth_digest) {
515 efree(SG(request_info).auth_digest);
516 }
517 if (SG(request_info).content_type_dup) {
518 efree(SG(request_info).content_type_dup);
519 }
520 if (SG(request_info).current_user) {
521 efree(SG(request_info).current_user);
522 }
523 if (sapi_module.deactivate) {
524 sapi_module.deactivate();
525 }
526 }
527
sapi_deactivate_destroy(void)528 SAPI_API void sapi_deactivate_destroy(void)
529 {
530 if (SG(rfc1867_uploaded_files)) {
531 destroy_uploaded_files_hash();
532 }
533 if (SG(sapi_headers).mimetype) {
534 efree(SG(sapi_headers).mimetype);
535 SG(sapi_headers).mimetype = NULL;
536 }
537 sapi_send_headers_free();
538 SG(sapi_started) = 0;
539 SG(headers_sent) = 0;
540 SG(request_info).headers_read = 0;
541 SG(global_request_time) = 0;
542 }
543
sapi_deactivate(void)544 SAPI_API void sapi_deactivate(void)
545 {
546 sapi_deactivate_module();
547 sapi_deactivate_destroy();
548 }
549
550
sapi_initialize_empty_request(void)551 SAPI_API void sapi_initialize_empty_request(void)
552 {
553 SG(server_context) = NULL;
554 SG(request_info).request_method = NULL;
555 SG(request_info).auth_digest = SG(request_info).auth_user = SG(request_info).auth_password = NULL;
556 SG(request_info).content_type_dup = NULL;
557 }
558
559
sapi_extract_response_code(const char * header_line)560 static int sapi_extract_response_code(const char *header_line)
561 {
562 int code = 200;
563 const char *ptr;
564
565 for (ptr = header_line; *ptr; ptr++) {
566 if (*ptr == ' ' && *(ptr + 1) != ' ') {
567 code = atoi(ptr + 1);
568 break;
569 }
570 }
571
572 return code;
573 }
574
575
sapi_update_response_code(int ncode)576 static void sapi_update_response_code(int ncode)
577 {
578 /* if the status code did not change, we do not want
579 to change the status line, and no need to change the code */
580 if (SG(sapi_headers).http_response_code == ncode) {
581 return;
582 }
583
584 if (SG(sapi_headers).http_status_line) {
585 efree(SG(sapi_headers).http_status_line);
586 SG(sapi_headers).http_status_line = NULL;
587 }
588 SG(sapi_headers).http_response_code = ncode;
589 }
590
591 /*
592 * since zend_llist_del_element only removes one matched item once,
593 * we should remove them manually
594 */
sapi_remove_header(zend_llist * l,char * name,size_t len)595 static void sapi_remove_header(zend_llist *l, char *name, size_t len) {
596 sapi_header_struct *header;
597 zend_llist_element *next;
598 zend_llist_element *current=l->head;
599
600 while (current) {
601 header = (sapi_header_struct *)(current->data);
602 next = current->next;
603 if (header->header_len > len && header->header[len] == ':'
604 && !strncasecmp(header->header, name, len)) {
605 if (current->prev) {
606 current->prev->next = next;
607 } else {
608 l->head = next;
609 }
610 if (next) {
611 next->prev = current->prev;
612 } else {
613 l->tail = current->prev;
614 }
615 sapi_free_header(header);
616 efree(current);
617 --l->count;
618 }
619 current = next;
620 }
621 }
622
sapi_add_header_ex(const char * header_line,size_t header_line_len,bool duplicate,bool replace)623 SAPI_API int sapi_add_header_ex(const char *header_line, size_t header_line_len, bool duplicate, bool replace)
624 {
625 sapi_header_line ctr = {0};
626 int r;
627
628 ctr.line = header_line;
629 ctr.line_len = header_line_len;
630
631 r = sapi_header_op(replace ? SAPI_HEADER_REPLACE : SAPI_HEADER_ADD,
632 &ctr);
633
634 if (!duplicate)
635 efree((void *) header_line);
636
637 return r;
638 }
639
sapi_header_add_op(sapi_header_op_enum op,sapi_header_struct * sapi_header)640 static void sapi_header_add_op(sapi_header_op_enum op, sapi_header_struct *sapi_header)
641 {
642 if (!sapi_module.header_handler ||
643 (SAPI_HEADER_ADD & sapi_module.header_handler(sapi_header, op, &SG(sapi_headers)))) {
644 if (op == SAPI_HEADER_REPLACE) {
645 char *colon_offset = strchr(sapi_header->header, ':');
646
647 if (colon_offset) {
648 char sav = *colon_offset;
649
650 *colon_offset = 0;
651 sapi_remove_header(&SG(sapi_headers).headers, sapi_header->header, strlen(sapi_header->header));
652 *colon_offset = sav;
653 }
654 }
655 zend_llist_add_element(&SG(sapi_headers).headers, (void *) sapi_header);
656 } else {
657 sapi_free_header(sapi_header);
658 }
659 }
660
sapi_header_op(sapi_header_op_enum op,void * arg)661 SAPI_API int sapi_header_op(sapi_header_op_enum op, void *arg)
662 {
663 sapi_header_struct sapi_header;
664 char *colon_offset;
665 char *header_line;
666 size_t header_line_len;
667 int http_response_code;
668
669 if (SG(headers_sent) && !SG(request_info).no_headers) {
670 const char *output_start_filename = php_output_get_start_filename();
671 int output_start_lineno = php_output_get_start_lineno();
672
673 if (output_start_filename) {
674 sapi_module.sapi_error(E_WARNING, "Cannot modify header information - headers already sent by (output started at %s:%d)",
675 output_start_filename, output_start_lineno);
676 } else {
677 sapi_module.sapi_error(E_WARNING, "Cannot modify header information - headers already sent");
678 }
679 return FAILURE;
680 }
681
682 switch (op) {
683 case SAPI_HEADER_SET_STATUS:
684 sapi_update_response_code((int)(zend_intptr_t) arg);
685 return SUCCESS;
686
687 case SAPI_HEADER_ADD:
688 case SAPI_HEADER_REPLACE:
689 case SAPI_HEADER_DELETE: {
690 sapi_header_line *p = arg;
691
692 if (!p->line || !p->line_len) {
693 return FAILURE;
694 }
695 header_line = estrndup(p->line, p->line_len);
696 header_line_len = p->line_len;
697 http_response_code = p->response_code;
698 break;
699 }
700
701 case SAPI_HEADER_DELETE_ALL:
702 if (sapi_module.header_handler) {
703 sapi_module.header_handler(&sapi_header, op, &SG(sapi_headers));
704 }
705 zend_llist_clean(&SG(sapi_headers).headers);
706 return SUCCESS;
707
708 default:
709 return FAILURE;
710 }
711
712 /* cut off trailing spaces, linefeeds and carriage-returns */
713 if (header_line_len && isspace(header_line[header_line_len-1])) {
714 do {
715 header_line_len--;
716 } while(header_line_len && isspace(header_line[header_line_len-1]));
717 header_line[header_line_len]='\0';
718 }
719
720 if (op == SAPI_HEADER_DELETE) {
721 if (strchr(header_line, ':')) {
722 efree(header_line);
723 sapi_module.sapi_error(E_WARNING, "Header to delete may not contain colon.");
724 return FAILURE;
725 }
726 if (sapi_module.header_handler) {
727 sapi_header.header = header_line;
728 sapi_header.header_len = header_line_len;
729 sapi_module.header_handler(&sapi_header, op, &SG(sapi_headers));
730 }
731 sapi_remove_header(&SG(sapi_headers).headers, header_line, header_line_len);
732 efree(header_line);
733 return SUCCESS;
734 } else {
735 /* new line/NUL character safety check */
736 uint32_t i;
737 for (i = 0; i < header_line_len; i++) {
738 /* RFC 7230 ch. 3.2.4 deprecates folding support */
739 if (header_line[i] == '\n' || header_line[i] == '\r') {
740 efree(header_line);
741 sapi_module.sapi_error(E_WARNING, "Header may not contain "
742 "more than a single header, new line detected");
743 return FAILURE;
744 }
745 if (header_line[i] == '\0') {
746 efree(header_line);
747 sapi_module.sapi_error(E_WARNING, "Header may not contain NUL bytes");
748 return FAILURE;
749 }
750 }
751 }
752
753 sapi_header.header = header_line;
754 sapi_header.header_len = header_line_len;
755
756 /* Check the header for a few cases that we have special support for in SAPI */
757 if (header_line_len>=5
758 && !strncasecmp(header_line, "HTTP/", 5)) {
759 /* filter out the response code */
760 sapi_update_response_code(sapi_extract_response_code(header_line));
761 /* sapi_update_response_code doesn't free the status line if the code didn't change */
762 if (SG(sapi_headers).http_status_line) {
763 efree(SG(sapi_headers).http_status_line);
764 }
765 SG(sapi_headers).http_status_line = header_line;
766 return SUCCESS;
767 } else {
768 colon_offset = strchr(header_line, ':');
769 if (colon_offset) {
770 *colon_offset = 0;
771 if (!strcasecmp(header_line, "Content-Type")) {
772 char *ptr = colon_offset+1, *mimetype = NULL, *newheader;
773 size_t len = header_line_len - (ptr - header_line), newlen;
774 while (*ptr == ' ') {
775 ptr++;
776 len--;
777 }
778
779 mimetype = estrdup(ptr);
780 newlen = sapi_apply_default_charset(&mimetype, len);
781 if (!SG(sapi_headers).mimetype){
782 SG(sapi_headers).mimetype = estrdup(mimetype);
783 }
784
785 if (newlen != 0) {
786 newlen += sizeof("Content-type: ");
787 newheader = emalloc(newlen);
788 PHP_STRLCPY(newheader, "Content-type: ", newlen, sizeof("Content-type: ")-1);
789 strlcat(newheader, mimetype, newlen);
790 sapi_header.header = newheader;
791 sapi_header.header_len = (uint32_t)(newlen - 1);
792 efree(header_line);
793 }
794 efree(mimetype);
795 SG(sapi_headers).send_default_content_type = 0;
796 } else if (!strcasecmp(header_line, "Content-Length")) {
797 /* Script is setting Content-length. The script cannot reasonably
798 * know the size of the message body after compression, so it's best
799 * do disable compression altogether. This contributes to making scripts
800 * portable between setups that have and don't have zlib compression
801 * enabled globally. See req #44164 */
802 zend_string *key = zend_string_init("zlib.output_compression", sizeof("zlib.output_compression")-1, 0);
803 zend_alter_ini_entry_chars(key,
804 "0", sizeof("0") - 1, PHP_INI_USER, PHP_INI_STAGE_RUNTIME);
805 zend_string_release_ex(key, 0);
806 } else if (!strcasecmp(header_line, "Location")) {
807 if ((SG(sapi_headers).http_response_code < 300 ||
808 SG(sapi_headers).http_response_code > 399) &&
809 SG(sapi_headers).http_response_code != 201) {
810 /* Return a Found Redirect if one is not already specified */
811 if (http_response_code) { /* user specified redirect code */
812 sapi_update_response_code(http_response_code);
813 } else if (SG(request_info).proto_num > 1000 &&
814 SG(request_info).request_method &&
815 strcmp(SG(request_info).request_method, "HEAD") &&
816 strcmp(SG(request_info).request_method, "GET")) {
817 sapi_update_response_code(303);
818 } else {
819 sapi_update_response_code(302);
820 }
821 }
822 } else if (!strcasecmp(header_line, "WWW-Authenticate")) { /* HTTP Authentication */
823 sapi_update_response_code(401); /* authentication-required */
824 }
825 if (sapi_header.header==header_line) {
826 *colon_offset = ':';
827 }
828 }
829 }
830 if (http_response_code) {
831 sapi_update_response_code(http_response_code);
832 }
833 sapi_header_add_op(op, &sapi_header);
834 return SUCCESS;
835 }
836
837
sapi_send_headers(void)838 SAPI_API int sapi_send_headers(void)
839 {
840 int retval;
841 int ret = FAILURE;
842
843 if (SG(headers_sent) || SG(request_info).no_headers) {
844 return SUCCESS;
845 }
846
847 /* Success-oriented. We set headers_sent to 1 here to avoid an infinite loop
848 * in case of an error situation.
849 */
850 if (SG(sapi_headers).send_default_content_type && sapi_module.send_headers) {
851 uint32_t len = 0;
852 char *default_mimetype = get_default_content_type(0, &len);
853
854 if (default_mimetype && len) {
855 sapi_header_struct default_header;
856
857 SG(sapi_headers).mimetype = default_mimetype;
858
859 default_header.header_len = sizeof("Content-type: ") - 1 + len;
860 default_header.header = emalloc(default_header.header_len + 1);
861
862 memcpy(default_header.header, "Content-type: ", sizeof("Content-type: ") - 1);
863 memcpy(default_header.header + sizeof("Content-type: ") - 1, SG(sapi_headers).mimetype, len + 1);
864
865 sapi_header_add_op(SAPI_HEADER_ADD, &default_header);
866 } else {
867 efree(default_mimetype);
868 }
869 SG(sapi_headers).send_default_content_type = 0;
870 }
871
872 if (Z_TYPE(SG(callback_func)) != IS_UNDEF) {
873 zval cb;
874 ZVAL_COPY_VALUE(&cb, &SG(callback_func));
875 ZVAL_UNDEF(&SG(callback_func));
876 sapi_run_header_callback(&cb);
877 zval_ptr_dtor(&cb);
878 }
879
880 SG(headers_sent) = 1;
881
882 if (sapi_module.send_headers) {
883 retval = sapi_module.send_headers(&SG(sapi_headers));
884 } else {
885 retval = SAPI_HEADER_DO_SEND;
886 }
887
888 switch (retval) {
889 case SAPI_HEADER_SENT_SUCCESSFULLY:
890 ret = SUCCESS;
891 break;
892 case SAPI_HEADER_DO_SEND: {
893 sapi_header_struct http_status_line;
894 char buf[255];
895
896 if (SG(sapi_headers).http_status_line) {
897 http_status_line.header = SG(sapi_headers).http_status_line;
898 http_status_line.header_len = (uint32_t)strlen(SG(sapi_headers).http_status_line);
899 } else {
900 http_status_line.header = buf;
901 http_status_line.header_len = slprintf(buf, sizeof(buf), "HTTP/1.0 %d X", SG(sapi_headers).http_response_code);
902 }
903 sapi_module.send_header(&http_status_line, SG(server_context));
904 }
905 zend_llist_apply_with_argument(&SG(sapi_headers).headers, (llist_apply_with_arg_func_t) sapi_module.send_header, SG(server_context));
906 if(SG(sapi_headers).send_default_content_type) {
907 sapi_header_struct default_header;
908
909 sapi_get_default_content_type_header(&default_header);
910 sapi_module.send_header(&default_header, SG(server_context));
911 sapi_free_header(&default_header);
912 }
913 sapi_module.send_header(NULL, SG(server_context));
914 ret = SUCCESS;
915 break;
916 case SAPI_HEADER_SEND_FAILED:
917 SG(headers_sent) = 0;
918 ret = FAILURE;
919 break;
920 }
921
922 sapi_send_headers_free();
923
924 return ret;
925 }
926
927
sapi_register_post_entries(const sapi_post_entry * post_entries)928 SAPI_API int sapi_register_post_entries(const sapi_post_entry *post_entries)
929 {
930 const sapi_post_entry *p=post_entries;
931
932 while (p->content_type) {
933 if (sapi_register_post_entry(p) == FAILURE) {
934 return FAILURE;
935 }
936 p++;
937 }
938 return SUCCESS;
939 }
940
941
sapi_register_post_entry(const sapi_post_entry * post_entry)942 SAPI_API int sapi_register_post_entry(const sapi_post_entry *post_entry)
943 {
944 int ret;
945 zend_string *key;
946 if (SG(sapi_started) && EG(current_execute_data)) {
947 return FAILURE;
948 }
949 key = zend_string_init(post_entry->content_type, post_entry->content_type_len, 1);
950 GC_MAKE_PERSISTENT_LOCAL(key);
951 ret = zend_hash_add_mem(&SG(known_post_content_types), key,
952 (void *) post_entry, sizeof(sapi_post_entry)) ? SUCCESS : FAILURE;
953 zend_string_release_ex(key, 1);
954 return ret;
955 }
956
sapi_unregister_post_entry(const sapi_post_entry * post_entry)957 SAPI_API void sapi_unregister_post_entry(const sapi_post_entry *post_entry)
958 {
959 if (SG(sapi_started) && EG(current_execute_data)) {
960 return;
961 }
962 zend_hash_str_del(&SG(known_post_content_types), post_entry->content_type,
963 post_entry->content_type_len);
964 }
965
966
sapi_register_default_post_reader(void (* default_post_reader)(void))967 SAPI_API int sapi_register_default_post_reader(void (*default_post_reader)(void))
968 {
969 if (SG(sapi_started) && EG(current_execute_data)) {
970 return FAILURE;
971 }
972 sapi_module.default_post_reader = default_post_reader;
973 return SUCCESS;
974 }
975
976
sapi_register_treat_data(void (* treat_data)(int arg,char * str,zval * destArray))977 SAPI_API int sapi_register_treat_data(void (*treat_data)(int arg, char *str, zval *destArray))
978 {
979 if (SG(sapi_started) && EG(current_execute_data)) {
980 return FAILURE;
981 }
982 sapi_module.treat_data = treat_data;
983 return SUCCESS;
984 }
985
sapi_register_input_filter(unsigned int (* input_filter)(int arg,const char * var,char ** val,size_t val_len,size_t * new_val_len),unsigned int (* input_filter_init)(void))986 SAPI_API int sapi_register_input_filter(unsigned int (*input_filter)(int arg, const char *var, char **val, size_t val_len, size_t *new_val_len), unsigned int (*input_filter_init)(void))
987 {
988 if (SG(sapi_started) && EG(current_execute_data)) {
989 return FAILURE;
990 }
991 sapi_module.input_filter = input_filter;
992 sapi_module.input_filter_init = input_filter_init;
993 return SUCCESS;
994 }
995
sapi_flush(void)996 SAPI_API int sapi_flush(void)
997 {
998 if (sapi_module.flush) {
999 sapi_module.flush(SG(server_context));
1000 return SUCCESS;
1001 } else {
1002 return FAILURE;
1003 }
1004 }
1005
sapi_get_stat(void)1006 SAPI_API zend_stat_t *sapi_get_stat(void)
1007 {
1008 if (sapi_module.get_stat) {
1009 return sapi_module.get_stat();
1010 } else {
1011 if (!SG(request_info).path_translated || (VCWD_STAT(SG(request_info).path_translated, &SG(global_stat)) == -1)) {
1012 return NULL;
1013 }
1014 return &SG(global_stat);
1015 }
1016 }
1017
sapi_getenv(const char * name,size_t name_len)1018 SAPI_API char *sapi_getenv(const char *name, size_t name_len)
1019 {
1020 if (!strncasecmp(name, "HTTP_PROXY", name_len)) {
1021 /* Ugly fix for HTTP_PROXY issue, see bug #72573 */
1022 return NULL;
1023 }
1024 if (sapi_module.getenv) {
1025 char *value, *tmp = sapi_module.getenv(name, name_len);
1026 if (tmp) {
1027 value = estrdup(tmp);
1028 #ifdef PHP_WIN32
1029 if (strlen(sapi_module.name) == sizeof("cgi-fcgi") - 1 && !strcmp(sapi_module.name, "cgi-fcgi")) {
1030 /* XXX more modules to go, if needed. */
1031 free(tmp);
1032 }
1033 #endif
1034 } else {
1035 return NULL;
1036 }
1037 if (sapi_module.input_filter) {
1038 sapi_module.input_filter(PARSE_STRING, name, &value, strlen(value), NULL);
1039 }
1040 return value;
1041 }
1042 return NULL;
1043 }
1044
sapi_get_fd(int * fd)1045 SAPI_API int sapi_get_fd(int *fd)
1046 {
1047 if (sapi_module.get_fd) {
1048 return sapi_module.get_fd(fd);
1049 } else {
1050 return FAILURE;
1051 }
1052 }
1053
sapi_force_http_10(void)1054 SAPI_API int sapi_force_http_10(void)
1055 {
1056 if (sapi_module.force_http_10) {
1057 return sapi_module.force_http_10();
1058 } else {
1059 return FAILURE;
1060 }
1061 }
1062
1063
sapi_get_target_uid(uid_t * obj)1064 SAPI_API int sapi_get_target_uid(uid_t *obj)
1065 {
1066 if (sapi_module.get_target_uid) {
1067 return sapi_module.get_target_uid(obj);
1068 } else {
1069 return FAILURE;
1070 }
1071 }
1072
sapi_get_target_gid(gid_t * obj)1073 SAPI_API int sapi_get_target_gid(gid_t *obj)
1074 {
1075 if (sapi_module.get_target_gid) {
1076 return sapi_module.get_target_gid(obj);
1077 } else {
1078 return FAILURE;
1079 }
1080 }
1081
sapi_get_request_time(void)1082 SAPI_API double sapi_get_request_time(void)
1083 {
1084 if(SG(global_request_time)) return SG(global_request_time);
1085
1086 if (sapi_module.get_request_time && SG(server_context)) {
1087 SG(global_request_time) = sapi_module.get_request_time();
1088 } else {
1089 struct timeval tp = {0};
1090 if (!gettimeofday(&tp, NULL)) {
1091 SG(global_request_time) = (double)(tp.tv_sec + tp.tv_usec / 1000000.00);
1092 } else {
1093 SG(global_request_time) = (double)time(0);
1094 }
1095 }
1096 return SG(global_request_time);
1097 }
1098
sapi_terminate_process(void)1099 SAPI_API void sapi_terminate_process(void) {
1100 if (sapi_module.terminate_process) {
1101 sapi_module.terminate_process();
1102 }
1103 }
1104
sapi_add_request_header(const char * var,unsigned int var_len,char * val,unsigned int val_len,void * arg)1105 SAPI_API void sapi_add_request_header(const char *var, unsigned int var_len, char *val, unsigned int val_len, void *arg) /* {{{ */
1106 {
1107 zval *return_value = (zval*)arg;
1108 char *buf = NULL;
1109
1110 ALLOCA_FLAG(use_heap)
1111
1112 if (var_len > 5 &&
1113 var[0] == 'H' &&
1114 var[1] == 'T' &&
1115 var[2] == 'T' &&
1116 var[3] == 'P' &&
1117 var[4] == '_') {
1118
1119 const char *p;
1120 char *str;
1121
1122 var_len -= 5;
1123 p = var + 5;
1124 var = str = buf = do_alloca(var_len + 1, use_heap);
1125 *str++ = *p++;
1126 while (*p) {
1127 if (*p == '_') {
1128 *str++ = '-';
1129 p++;
1130 if (*p) {
1131 *str++ = *p++;
1132 }
1133 } else if (*p >= 'A' && *p <= 'Z') {
1134 *str++ = (*p++ - 'A' + 'a');
1135 } else {
1136 *str++ = *p++;
1137 }
1138 }
1139 *str = 0;
1140 } else if (var_len == sizeof("CONTENT_TYPE")-1 &&
1141 memcmp(var, "CONTENT_TYPE", sizeof("CONTENT_TYPE")-1) == 0) {
1142 var = "Content-Type";
1143 } else if (var_len == sizeof("CONTENT_LENGTH")-1 &&
1144 memcmp(var, "CONTENT_LENGTH", sizeof("CONTENT_LENGTH")-1) == 0) {
1145 var = "Content-Length";
1146 } else {
1147 return;
1148 }
1149 add_assoc_stringl_ex(return_value, var, var_len, val, val_len);
1150 if (buf) {
1151 free_alloca(buf, use_heap);
1152 }
1153 }
1154 /* }}} */
1155
