1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Zeev Suraski <zeev@zend.com> |
16 | Thies C. Arntzen <thies@thieso.net> |
17 | Marcus Boerger <helly@php.net> |
18 | New API: Michael Wallner <mike@php.net> |
19 +----------------------------------------------------------------------+
20 */
21
22 /* $Id$ */
23
24 #ifndef PHP_OUTPUT_DEBUG
25 # define PHP_OUTPUT_DEBUG 0
26 #endif
27 #ifndef PHP_OUTPUT_NOINLINE
28 # define PHP_OUTPUT_NOINLINE 0
29 #endif
30
31 #include "php.h"
32 #include "ext/standard/head.h"
33 #include "ext/standard/url_scanner_ex.h"
34 #include "SAPI.h"
35 #include "zend_stack.h"
36 #include "php_output.h"
37
38 PHPAPI ZEND_DECLARE_MODULE_GLOBALS(output);
39
40 const char php_output_default_handler_name[sizeof("default output handler")] = "default output handler";
41 const char php_output_devnull_handler_name[sizeof("null output handler")] = "null output handler";
42
43 #if PHP_OUTPUT_NOINLINE || PHP_OUTPUT_DEBUG
44 # undef inline
45 # define inline
46 #endif
47
48 /* {{{ aliases, conflict and reverse conflict hash tables */
49 static HashTable php_output_handler_aliases;
50 static HashTable php_output_handler_conflicts;
51 static HashTable php_output_handler_reverse_conflicts;
52 /* }}} */
53
54 /* {{{ forward declarations */
55 static inline int php_output_lock_error(int op);
56 static inline void php_output_op(int op, const char *str, size_t len);
57
58 static inline php_output_handler *php_output_handler_init(zend_string *name, size_t chunk_size, int flags);
59 static inline php_output_handler_status_t php_output_handler_op(php_output_handler *handler, php_output_context *context);
60 static inline int php_output_handler_append(php_output_handler *handler, const php_output_buffer *buf);
61 static inline zval *php_output_handler_status(php_output_handler *handler, zval *entry);
62
63 static inline php_output_context *php_output_context_init(php_output_context *context, int op);
64 static inline void php_output_context_reset(php_output_context *context);
65 static inline void php_output_context_swap(php_output_context *context);
66 static inline void php_output_context_dtor(php_output_context *context);
67
68 static inline int php_output_stack_pop(int flags);
69
70 static int php_output_stack_apply_op(void *h, void *c);
71 static int php_output_stack_apply_clean(void *h, void *c);
72 static int php_output_stack_apply_list(void *h, void *z);
73 static int php_output_stack_apply_status(void *h, void *z);
74
75 static int php_output_handler_compat_func(void **handler_context, php_output_context *output_context);
76 static int php_output_handler_default_func(void **handler_context, php_output_context *output_context);
77 static int php_output_handler_devnull_func(void **handler_context, php_output_context *output_context);
78 /* }}} */
79
80 /* {{{ static void php_output_init_globals(zend_output_globals *G)
81 * Initialize the module globals on MINIT */
php_output_init_globals(zend_output_globals * G)82 static inline void php_output_init_globals(zend_output_globals *G)
83 {
84 ZEND_TSRMLS_CACHE_UPDATE();
85 memset(G, 0, sizeof(*G));
86 }
87 /* }}} */
88
89 /* {{{ stderr/stdout writer if not PHP_OUTPUT_ACTIVATED */
php_output_stdout(const char * str,size_t str_len)90 static size_t php_output_stdout(const char *str, size_t str_len)
91 {
92 fwrite(str, 1, str_len, stdout);
93 return str_len;
94 }
php_output_stderr(const char * str,size_t str_len)95 static size_t php_output_stderr(const char *str, size_t str_len)
96 {
97 fwrite(str, 1, str_len, stderr);
98 /* See http://support.microsoft.com/kb/190351 */
99 #ifdef PHP_WIN32
100 fflush(stderr);
101 #endif
102 return str_len;
103 }
104 static size_t (*php_output_direct)(const char *str, size_t str_len) = php_output_stderr;
105 /* }}} */
106
107 /* {{{ void php_output_header(void) */
php_output_header(void)108 static void php_output_header(void)
109 {
110 if (!SG(headers_sent)) {
111 if (!OG(output_start_filename)) {
112 if (zend_is_compiling()) {
113 OG(output_start_filename) = ZSTR_VAL(zend_get_compiled_filename());
114 OG(output_start_lineno) = zend_get_compiled_lineno();
115 } else if (zend_is_executing()) {
116 OG(output_start_filename) = zend_get_executed_filename();
117 OG(output_start_lineno) = zend_get_executed_lineno();
118 }
119 #if PHP_OUTPUT_DEBUG
120 fprintf(stderr, "!!! output started at: %s (%d)\n", OG(output_start_filename), OG(output_start_lineno));
121 #endif
122 }
123 if (!php_header()) {
124 OG(flags) |= PHP_OUTPUT_DISABLED;
125 }
126 }
127 }
128 /* }}} */
129
reverse_conflict_dtor(zval * zv)130 static void reverse_conflict_dtor(zval *zv)
131 {
132 HashTable *ht = Z_PTR_P(zv);
133 zend_hash_destroy(ht);
134 }
135
136 /* {{{ void php_output_startup(void)
137 * Set up module globals and initalize the conflict and reverse conflict hash tables */
php_output_startup(void)138 PHPAPI void php_output_startup(void)
139 {
140 ZEND_INIT_MODULE_GLOBALS(output, php_output_init_globals, NULL);
141 zend_hash_init(&php_output_handler_aliases, 8, NULL, NULL, 1);
142 zend_hash_init(&php_output_handler_conflicts, 8, NULL, NULL, 1);
143 zend_hash_init(&php_output_handler_reverse_conflicts, 8, NULL, reverse_conflict_dtor, 1);
144 php_output_direct = php_output_stdout;
145 }
146 /* }}} */
147
148 /* {{{ void php_output_shutdown(void)
149 * Destroy module globals and the conflict and reverse conflict hash tables */
php_output_shutdown(void)150 PHPAPI void php_output_shutdown(void)
151 {
152 php_output_direct = php_output_stderr;
153 zend_hash_destroy(&php_output_handler_aliases);
154 zend_hash_destroy(&php_output_handler_conflicts);
155 zend_hash_destroy(&php_output_handler_reverse_conflicts);
156 }
157 /* }}} */
158
159 /* {{{ SUCCESS|FAILURE php_output_activate(void)
160 * Reset output globals and setup the output handler stack */
php_output_activate(void)161 PHPAPI int php_output_activate(void)
162 {
163 #ifdef ZTS
164 memset((*((void ***) ZEND_TSRMLS_CACHE))[TSRM_UNSHUFFLE_RSRC_ID(output_globals_id)], 0, sizeof(zend_output_globals));
165 #else
166 memset(&output_globals, 0, sizeof(zend_output_globals));
167 #endif
168
169 zend_stack_init(&OG(handlers), sizeof(php_output_handler *));
170 OG(flags) |= PHP_OUTPUT_ACTIVATED;
171
172 return SUCCESS;
173 }
174 /* }}} */
175
176 /* {{{ void php_output_deactivate(void)
177 * Destroy the output handler stack */
php_output_deactivate(void)178 PHPAPI void php_output_deactivate(void)
179 {
180 php_output_handler **handler = NULL;
181
182 if ((OG(flags) & PHP_OUTPUT_ACTIVATED)) {
183 php_output_header();
184
185 OG(flags) ^= PHP_OUTPUT_ACTIVATED;
186 OG(active) = NULL;
187 OG(running) = NULL;
188
189 /* release all output handlers */
190 if (OG(handlers).elements) {
191 while ((handler = zend_stack_top(&OG(handlers)))) {
192 php_output_handler_free(handler);
193 zend_stack_del_top(&OG(handlers));
194 }
195 }
196 zend_stack_destroy(&OG(handlers));
197 }
198 }
199 /* }}} */
200
201 /* {{{ void php_output_register_constants() */
php_output_register_constants(void)202 PHPAPI void php_output_register_constants(void)
203 {
204 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_START", PHP_OUTPUT_HANDLER_START, CONST_CS | CONST_PERSISTENT);
205 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_WRITE", PHP_OUTPUT_HANDLER_WRITE, CONST_CS | CONST_PERSISTENT);
206 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_FLUSH", PHP_OUTPUT_HANDLER_FLUSH, CONST_CS | CONST_PERSISTENT);
207 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_CLEAN", PHP_OUTPUT_HANDLER_CLEAN, CONST_CS | CONST_PERSISTENT);
208 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_FINAL", PHP_OUTPUT_HANDLER_FINAL, CONST_CS | CONST_PERSISTENT);
209 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_CONT", PHP_OUTPUT_HANDLER_WRITE, CONST_CS | CONST_PERSISTENT);
210 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_END", PHP_OUTPUT_HANDLER_FINAL, CONST_CS | CONST_PERSISTENT);
211
212 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_CLEANABLE", PHP_OUTPUT_HANDLER_CLEANABLE, CONST_CS | CONST_PERSISTENT);
213 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_FLUSHABLE", PHP_OUTPUT_HANDLER_FLUSHABLE, CONST_CS | CONST_PERSISTENT);
214 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_REMOVABLE", PHP_OUTPUT_HANDLER_REMOVABLE, CONST_CS | CONST_PERSISTENT);
215 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_STDFLAGS", PHP_OUTPUT_HANDLER_STDFLAGS, CONST_CS | CONST_PERSISTENT);
216 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_STARTED", PHP_OUTPUT_HANDLER_STARTED, CONST_CS | CONST_PERSISTENT);
217 REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_DISABLED", PHP_OUTPUT_HANDLER_DISABLED, CONST_CS | CONST_PERSISTENT);
218 }
219 /* }}} */
220
221 /* {{{ void php_output_set_status(int status)
222 * Used by SAPIs to disable output */
php_output_set_status(int status)223 PHPAPI void php_output_set_status(int status)
224 {
225 OG(flags) = (OG(flags) & ~0xf) | (status & 0xf);
226 }
227 /* }}} */
228
229 /* {{{ int php_output_get_status()
230 * Get output control status */
php_output_get_status(void)231 PHPAPI int php_output_get_status(void)
232 {
233 return (
234 OG(flags)
235 | (OG(active) ? PHP_OUTPUT_ACTIVE : 0)
236 | (OG(running)? PHP_OUTPUT_LOCKED : 0)
237 ) & 0xff;
238 }
239 /* }}} */
240
241 /* {{{ int php_output_write_unbuffered(const char *str, size_t len)
242 * Unbuffered write */
php_output_write_unbuffered(const char * str,size_t len)243 PHPAPI size_t php_output_write_unbuffered(const char *str, size_t len)
244 {
245 if (OG(flags) & PHP_OUTPUT_ACTIVATED) {
246 return sapi_module.ub_write(str, len);
247 }
248 return php_output_direct(str, len);
249 }
250 /* }}} */
251
252 /* {{{ int php_output_write(const char *str, size_t len)
253 * Buffered write */
php_output_write(const char * str,size_t len)254 PHPAPI size_t php_output_write(const char *str, size_t len)
255 {
256 if (OG(flags) & PHP_OUTPUT_ACTIVATED) {
257 php_output_op(PHP_OUTPUT_HANDLER_WRITE, str, len);
258 return len;
259 }
260 if (OG(flags) & PHP_OUTPUT_DISABLED) {
261 return 0;
262 }
263 return php_output_direct(str, len);
264 }
265 /* }}} */
266
267 /* {{{ SUCCESS|FAILURE php_output_flush(void)
268 * Flush the most recent output handlers buffer */
php_output_flush(void)269 PHPAPI int php_output_flush(void)
270 {
271 php_output_context context;
272
273 if (OG(active) && (OG(active)->flags & PHP_OUTPUT_HANDLER_FLUSHABLE)) {
274 php_output_context_init(&context, PHP_OUTPUT_HANDLER_FLUSH);
275 php_output_handler_op(OG(active), &context);
276 if (context.out.data && context.out.used) {
277 zend_stack_del_top(&OG(handlers));
278 php_output_write(context.out.data, context.out.used);
279 zend_stack_push(&OG(handlers), &OG(active));
280 }
281 php_output_context_dtor(&context);
282 return SUCCESS;
283 }
284 return FAILURE;
285 }
286 /* }}} */
287
288 /* {{{ void php_output_flush_all()
289 * Flush all output buffers subsequently */
php_output_flush_all(void)290 PHPAPI void php_output_flush_all(void)
291 {
292 if (OG(active)) {
293 php_output_op(PHP_OUTPUT_HANDLER_FLUSH, NULL, 0);
294 }
295 }
296 /* }}} */
297
298 /* {{{ SUCCESS|FAILURE php_output_clean(void)
299 * Cleans the most recent output handlers buffer if the handler is cleanable */
php_output_clean(void)300 PHPAPI int php_output_clean(void)
301 {
302 php_output_context context;
303
304 if (OG(active) && (OG(active)->flags & PHP_OUTPUT_HANDLER_CLEANABLE)) {
305 php_output_context_init(&context, PHP_OUTPUT_HANDLER_CLEAN);
306 php_output_handler_op(OG(active), &context);
307 php_output_context_dtor(&context);
308 return SUCCESS;
309 }
310 return FAILURE;
311 }
312 /* }}} */
313
314 /* {{{ void php_output_clean_all(void)
315 * Cleans all output handler buffers, without regard whether the handler is cleanable */
php_output_clean_all(void)316 PHPAPI void php_output_clean_all(void)
317 {
318 php_output_context context;
319
320 if (OG(active)) {
321 php_output_context_init(&context, PHP_OUTPUT_HANDLER_CLEAN);
322 zend_stack_apply_with_argument(&OG(handlers), ZEND_STACK_APPLY_TOPDOWN, php_output_stack_apply_clean, &context);
323 }
324 }
325
326 /* {{{ SUCCESS|FAILURE php_output_end(void)
327 * Finalizes the most recent output handler at pops it off the stack if the handler is removable */
php_output_end(void)328 PHPAPI int php_output_end(void)
329 {
330 if (php_output_stack_pop(PHP_OUTPUT_POP_TRY)) {
331 return SUCCESS;
332 }
333 return FAILURE;
334 }
335 /* }}} */
336
337 /* {{{ void php_output_end_all(void)
338 * Finalizes all output handlers and ends output buffering without regard whether a handler is removable */
php_output_end_all(void)339 PHPAPI void php_output_end_all(void)
340 {
341 while (OG(active) && php_output_stack_pop(PHP_OUTPUT_POP_FORCE));
342 }
343 /* }}} */
344
345 /* {{{ SUCCESS|FAILURE php_output_discard(void)
346 * Discards the most recent output handlers buffer and pops it off the stack if the handler is removable */
php_output_discard(void)347 PHPAPI int php_output_discard(void)
348 {
349 if (php_output_stack_pop(PHP_OUTPUT_POP_DISCARD|PHP_OUTPUT_POP_TRY)) {
350 return SUCCESS;
351 }
352 return FAILURE;
353 }
354 /* }}} */
355
356 /* {{{ void php_output_discard_all(void)
357 * Discard all output handlers and buffers without regard whether a handler is removable */
php_output_discard_all(void)358 PHPAPI void php_output_discard_all(void)
359 {
360 while (OG(active)) {
361 php_output_stack_pop(PHP_OUTPUT_POP_DISCARD|PHP_OUTPUT_POP_FORCE);
362 }
363 }
364 /* }}} */
365
366 /* {{{ int php_output_get_level(void)
367 * Get output buffering level, ie. how many output handlers the stack contains */
php_output_get_level(void)368 PHPAPI int php_output_get_level(void)
369 {
370 return OG(active) ? zend_stack_count(&OG(handlers)) : 0;
371 }
372 /* }}} */
373
374 /* {{{ SUCCESS|FAILURE php_output_get_contents(zval *z)
375 * Get the contents of the active output handlers buffer */
php_output_get_contents(zval * p)376 PHPAPI int php_output_get_contents(zval *p)
377 {
378 if (OG(active)) {
379 ZVAL_STRINGL(p, OG(active)->buffer.data, OG(active)->buffer.used);
380 return SUCCESS;
381 } else {
382 ZVAL_NULL(p);
383 return FAILURE;
384 }
385 }
386
387 /* {{{ SUCCESS|FAILURE php_output_get_length(zval *z)
388 * Get the length of the active output handlers buffer */
php_output_get_length(zval * p)389 PHPAPI int php_output_get_length(zval *p)
390 {
391 if (OG(active)) {
392 ZVAL_LONG(p, OG(active)->buffer.used);
393 return SUCCESS;
394 } else {
395 ZVAL_NULL(p);
396 return FAILURE;
397 }
398 }
399 /* }}} */
400
401 /* {{{ php_output_handler* php_output_get_active_handler(void)
402 * Get active output handler */
php_output_get_active_handler(void)403 PHPAPI php_output_handler* php_output_get_active_handler(void)
404 {
405 return OG(active);
406 }
407 /* }}} */
408
409 /* {{{ SUCCESS|FAILURE php_output_handler_start_default(void)
410 * Start a "default output handler" */
php_output_start_default(void)411 PHPAPI int php_output_start_default(void)
412 {
413 php_output_handler *handler;
414
415 handler = php_output_handler_create_internal(ZEND_STRL(php_output_default_handler_name), php_output_handler_default_func, 0, PHP_OUTPUT_HANDLER_STDFLAGS);
416 if (SUCCESS == php_output_handler_start(handler)) {
417 return SUCCESS;
418 }
419 php_output_handler_free(&handler);
420 return FAILURE;
421 }
422 /* }}} */
423
424 /* {{{ SUCCESS|FAILURE php_output_handler_start_devnull(void)
425 * Start a "null output handler" */
php_output_start_devnull(void)426 PHPAPI int php_output_start_devnull(void)
427 {
428 php_output_handler *handler;
429
430 handler = php_output_handler_create_internal(ZEND_STRL(php_output_devnull_handler_name), php_output_handler_devnull_func, PHP_OUTPUT_HANDLER_DEFAULT_SIZE, 0);
431 if (SUCCESS == php_output_handler_start(handler)) {
432 return SUCCESS;
433 }
434 php_output_handler_free(&handler);
435 return FAILURE;
436 }
437 /* }}} */
438
439 /* {{{ SUCCESS|FAILURE php_output_start_user(zval *handler, size_t chunk_size, int flags)
440 * Start a user level output handler */
php_output_start_user(zval * output_handler,size_t chunk_size,int flags)441 PHPAPI int php_output_start_user(zval *output_handler, size_t chunk_size, int flags)
442 {
443 php_output_handler *handler;
444
445 if (output_handler) {
446 handler = php_output_handler_create_user(output_handler, chunk_size, flags);
447 } else {
448 handler = php_output_handler_create_internal(ZEND_STRL(php_output_default_handler_name), php_output_handler_default_func, chunk_size, flags);
449 }
450 if (SUCCESS == php_output_handler_start(handler)) {
451 return SUCCESS;
452 }
453 php_output_handler_free(&handler);
454 return FAILURE;
455 }
456 /* }}} */
457
458 /* {{{ SUCCESS|FAILURE php_output_start_internal(zval *name, php_output_handler_func_t handler, size_t chunk_size, int flags)
459 * Start an internal output handler that does not have to maintain a non-global state */
php_output_start_internal(const char * name,size_t name_len,php_output_handler_func_t output_handler,size_t chunk_size,int flags)460 PHPAPI int php_output_start_internal(const char *name, size_t name_len, php_output_handler_func_t output_handler, size_t chunk_size, int flags)
461 {
462 php_output_handler *handler;
463
464 handler = php_output_handler_create_internal(name, name_len, php_output_handler_compat_func, chunk_size, flags);
465 php_output_handler_set_context(handler, output_handler, NULL);
466 if (SUCCESS == php_output_handler_start(handler)) {
467 return SUCCESS;
468 }
469 php_output_handler_free(&handler);
470 return FAILURE;
471 }
472 /* }}} */
473
474 /* {{{ php_output_handler *php_output_handler_create_user(zval *handler, size_t chunk_size, int flags)
475 * Create a user level output handler */
php_output_handler_create_user(zval * output_handler,size_t chunk_size,int flags)476 PHPAPI php_output_handler *php_output_handler_create_user(zval *output_handler, size_t chunk_size, int flags)
477 {
478 zend_string *handler_name = NULL;
479 char *error = NULL;
480 php_output_handler *handler = NULL;
481 php_output_handler_alias_ctor_t alias = NULL;
482 php_output_handler_user_func_t *user = NULL;
483
484 switch (Z_TYPE_P(output_handler)) {
485 case IS_NULL:
486 handler = php_output_handler_create_internal(ZEND_STRL(php_output_default_handler_name), php_output_handler_default_func, chunk_size, flags);
487 break;
488 case IS_STRING:
489 if (Z_STRLEN_P(output_handler) && (alias = php_output_handler_alias(Z_STRVAL_P(output_handler), Z_STRLEN_P(output_handler)))) {
490 handler = alias(Z_STRVAL_P(output_handler), Z_STRLEN_P(output_handler), chunk_size, flags);
491 break;
492 }
493 default:
494 user = ecalloc(1, sizeof(php_output_handler_user_func_t));
495 if (SUCCESS == zend_fcall_info_init(output_handler, 0, &user->fci, &user->fcc, &handler_name, &error)) {
496 handler = php_output_handler_init(handler_name, chunk_size, (flags & ~0xf) | PHP_OUTPUT_HANDLER_USER);
497 ZVAL_COPY(&user->zoh, output_handler);
498 handler->func.user = user;
499 } else {
500 efree(user);
501 }
502 if (error) {
503 php_error_docref("ref.outcontrol", E_WARNING, "%s", error);
504 efree(error);
505 }
506 if (handler_name) {
507 zend_string_release(handler_name);
508 }
509 }
510
511 return handler;
512 }
513 /* }}} */
514
515 /* {{{ php_output_handler *php_output_handler_create_internal(zval *name, php_output_handler_context_func_t handler, size_t chunk_size, int flags)
516 * Create an internal output handler that can maintain a non-global state */
php_output_handler_create_internal(const char * name,size_t name_len,php_output_handler_context_func_t output_handler,size_t chunk_size,int flags)517 PHPAPI php_output_handler *php_output_handler_create_internal(const char *name, size_t name_len, php_output_handler_context_func_t output_handler, size_t chunk_size, int flags)
518 {
519 php_output_handler *handler;
520 zend_string *str = zend_string_init(name, name_len, 1);
521
522 handler = php_output_handler_init(str, chunk_size, (flags & ~0xf) | PHP_OUTPUT_HANDLER_INTERNAL);
523 handler->func.internal = output_handler;
524 zend_string_release(str);
525
526 return handler;
527 }
528 /* }}} */
529
530 /* {{{ void php_output_handler_set_context(php_output_handler *handler, void *opaq, void (*dtor)(void*))
531 * Set the context/state of an output handler. Calls the dtor of the previous context if there is one */
php_output_handler_set_context(php_output_handler * handler,void * opaq,void (* dtor)(void *))532 PHPAPI void php_output_handler_set_context(php_output_handler *handler, void *opaq, void (*dtor)(void*))
533 {
534 if (handler->dtor && handler->opaq) {
535 handler->dtor(handler->opaq);
536 }
537 handler->dtor = dtor;
538 handler->opaq = opaq;
539 }
540 /* }}} */
541
542 /* {{{ SUCCESS|FAILURE php_output_handler_start(php_output_handler *handler)
543 * Starts the set up output handler and pushes it on top of the stack. Checks for any conflicts regarding the output handler to start */
php_output_handler_start(php_output_handler * handler)544 PHPAPI int php_output_handler_start(php_output_handler *handler)
545 {
546 HashTable *rconflicts;
547 php_output_handler_conflict_check_t conflict;
548
549 if (php_output_lock_error(PHP_OUTPUT_HANDLER_START) || !handler) {
550 return FAILURE;
551 }
552 if (NULL != (conflict = zend_hash_find_ptr(&php_output_handler_conflicts, handler->name))) {
553 if (SUCCESS != conflict(ZSTR_VAL(handler->name), ZSTR_LEN(handler->name))) {
554 return FAILURE;
555 }
556 }
557 if (NULL != (rconflicts = zend_hash_find_ptr(&php_output_handler_reverse_conflicts, handler->name))) {
558 ZEND_HASH_FOREACH_PTR(rconflicts, conflict) {
559 if (SUCCESS != conflict(ZSTR_VAL(handler->name), ZSTR_LEN(handler->name))) {
560 return FAILURE;
561 }
562 } ZEND_HASH_FOREACH_END();
563 }
564 /* zend_stack_push returns stack level */
565 handler->level = zend_stack_push(&OG(handlers), &handler);
566 OG(active) = handler;
567 return SUCCESS;
568 }
569 /* }}} */
570
571 /* {{{ int php_output_handler_started(zval *name)
572 * Check whether a certain output handler is in use */
php_output_handler_started(const char * name,size_t name_len)573 PHPAPI int php_output_handler_started(const char *name, size_t name_len)
574 {
575 php_output_handler **handlers;
576 int i, count = php_output_get_level();
577
578 if (count) {
579 handlers = (php_output_handler **) zend_stack_base(&OG(handlers));
580
581 for (i = 0; i < count; ++i) {
582 if (name_len == ZSTR_LEN(handlers[i]->name) && !memcmp(ZSTR_VAL(handlers[i]->name), name, name_len)) {
583 return 1;
584 }
585 }
586 }
587
588 return 0;
589 }
590 /* }}} */
591
592 /* {{{ int php_output_handler_conflict(zval *handler_new, zval *handler_old)
593 * Check whether a certain handler is in use and issue a warning that the new handler would conflict with the already used one */
php_output_handler_conflict(const char * handler_new,size_t handler_new_len,const char * handler_set,size_t handler_set_len)594 PHPAPI int php_output_handler_conflict(const char *handler_new, size_t handler_new_len, const char *handler_set, size_t handler_set_len)
595 {
596 if (php_output_handler_started(handler_set, handler_set_len)) {
597 if (handler_new_len != handler_set_len || memcmp(handler_new, handler_set, handler_set_len)) {
598 php_error_docref("ref.outcontrol", E_WARNING, "output handler '%s' conflicts with '%s'", handler_new, handler_set);
599 } else {
600 php_error_docref("ref.outcontrol", E_WARNING, "output handler '%s' cannot be used twice", handler_new);
601 }
602 return 1;
603 }
604 return 0;
605 }
606 /* }}} */
607
608 /* {{{ SUCCESS|FAILURE php_output_handler_conflict_register(zval *name, php_output_handler_conflict_check_t check_func)
609 * Register a conflict checking function on MINIT */
php_output_handler_conflict_register(const char * name,size_t name_len,php_output_handler_conflict_check_t check_func)610 PHPAPI int php_output_handler_conflict_register(const char *name, size_t name_len, php_output_handler_conflict_check_t check_func)
611 {
612 if (!EG(current_module)) {
613 zend_error(E_ERROR, "Cannot register an output handler conflict outside of MINIT");
614 return FAILURE;
615 }
616 return zend_hash_str_update_ptr(&php_output_handler_conflicts, name, name_len, check_func) ? SUCCESS : FAILURE;
617 }
618 /* }}} */
619
620 /* {{{ SUCCESS|FAILURE php_output_handler_reverse_conflict_register(zval *name, php_output_handler_conflict_check_t check_func)
621 * Register a reverse conflict checking function on MINIT */
php_output_handler_reverse_conflict_register(const char * name,size_t name_len,php_output_handler_conflict_check_t check_func)622 PHPAPI int php_output_handler_reverse_conflict_register(const char *name, size_t name_len, php_output_handler_conflict_check_t check_func)
623 {
624 HashTable rev, *rev_ptr = NULL;
625
626 if (!EG(current_module)) {
627 zend_error(E_ERROR, "Cannot register a reverse output handler conflict outside of MINIT");
628 return FAILURE;
629 }
630
631 if (NULL != (rev_ptr = zend_hash_str_find_ptr(&php_output_handler_reverse_conflicts, name, name_len))) {
632 return zend_hash_next_index_insert_ptr(rev_ptr, check_func) ? SUCCESS : FAILURE;
633 } else {
634 zend_hash_init(&rev, 8, NULL, NULL, 1);
635 if (NULL == zend_hash_next_index_insert_ptr(&rev, check_func)) {
636 zend_hash_destroy(&rev);
637 return FAILURE;
638 }
639 if (NULL == zend_hash_str_update_mem(&php_output_handler_reverse_conflicts, name, name_len+1, &rev, sizeof(HashTable))) {
640 zend_hash_destroy(&rev);
641 return FAILURE;
642 }
643 return SUCCESS;
644 }
645 }
646 /* }}} */
647
648 /* {{{ php_output_handler_alias_ctor_t php_output_handler_alias(zval *name)
649 * Get an internal output handler for a user handler if it exists */
php_output_handler_alias(const char * name,size_t name_len)650 PHPAPI php_output_handler_alias_ctor_t php_output_handler_alias(const char *name, size_t name_len)
651 {
652 return zend_hash_str_find_ptr(&php_output_handler_aliases, name, name_len);
653 }
654 /* }}} */
655
656 /* {{{ SUCCESS|FAILURE php_output_handler_alias_register(zval *name, php_output_handler_alias_ctor_t func)
657 * Registers an internal output handler as alias for a user handler */
php_output_handler_alias_register(const char * name,size_t name_len,php_output_handler_alias_ctor_t func)658 PHPAPI int php_output_handler_alias_register(const char *name, size_t name_len, php_output_handler_alias_ctor_t func)
659 {
660 if (!EG(current_module)) {
661 zend_error(E_ERROR, "Cannot register an output handler alias outside of MINIT");
662 return FAILURE;
663 }
664 return zend_hash_str_update_ptr(&php_output_handler_aliases, name, name_len, func) ? SUCCESS : FAILURE;
665 }
666 /* }}} */
667
668 /* {{{ SUCCESS|FAILURE php_output_handler_hook(php_output_handler_hook_t type, void *arg)
669 * Output handler hook for output handler functions to check/modify the current handlers abilities */
php_output_handler_hook(php_output_handler_hook_t type,void * arg)670 PHPAPI int php_output_handler_hook(php_output_handler_hook_t type, void *arg)
671 {
672 if (OG(running)) {
673 switch (type) {
674 case PHP_OUTPUT_HANDLER_HOOK_GET_OPAQ:
675 *(void ***) arg = &OG(running)->opaq;
676 return SUCCESS;
677 case PHP_OUTPUT_HANDLER_HOOK_GET_FLAGS:
678 *(int *) arg = OG(running)->flags;
679 return SUCCESS;
680 case PHP_OUTPUT_HANDLER_HOOK_GET_LEVEL:
681 *(int *) arg = OG(running)->level;
682 return SUCCESS;
683 case PHP_OUTPUT_HANDLER_HOOK_IMMUTABLE:
684 OG(running)->flags &= ~(PHP_OUTPUT_HANDLER_REMOVABLE|PHP_OUTPUT_HANDLER_CLEANABLE);
685 return SUCCESS;
686 case PHP_OUTPUT_HANDLER_HOOK_DISABLE:
687 OG(running)->flags |= PHP_OUTPUT_HANDLER_DISABLED;
688 return SUCCESS;
689 default:
690 break;
691 }
692 }
693 return FAILURE;
694 }
695 /* }}} */
696
697 /* {{{ void php_output_handler_dtor(php_output_handler *handler)
698 * Destroy an output handler */
php_output_handler_dtor(php_output_handler * handler)699 PHPAPI void php_output_handler_dtor(php_output_handler *handler)
700 {
701 if (handler->name) {
702 zend_string_release(handler->name);
703 }
704 if (handler->buffer.data) {
705 efree(handler->buffer.data);
706 }
707 if (handler->flags & PHP_OUTPUT_HANDLER_USER) {
708 zval_ptr_dtor(&handler->func.user->zoh);
709 efree(handler->func.user);
710 }
711 if (handler->dtor && handler->opaq) {
712 handler->dtor(handler->opaq);
713 }
714 memset(handler, 0, sizeof(*handler));
715 }
716 /* }}} */
717
718 /* {{{ void php_output_handler_free(php_output_handler **handler)
719 * Destroy and free an output handler */
php_output_handler_free(php_output_handler ** h)720 PHPAPI void php_output_handler_free(php_output_handler **h)
721 {
722 if (*h) {
723 php_output_handler_dtor(*h);
724 efree(*h);
725 *h = NULL;
726 }
727 }
728 /* }}} */
729
730 /* void php_output_set_implicit_flush(int enabled)
731 * Enable or disable implicit flush */
php_output_set_implicit_flush(int flush)732 PHPAPI void php_output_set_implicit_flush(int flush)
733 {
734 if (flush) {
735 OG(flags) |= PHP_OUTPUT_IMPLICITFLUSH;
736 } else {
737 OG(flags) &= ~PHP_OUTPUT_IMPLICITFLUSH;
738 }
739 }
740 /* }}} */
741
742 /* {{{ char *php_output_get_start_filename(void)
743 * Get the file name where output has started */
php_output_get_start_filename(void)744 PHPAPI const char *php_output_get_start_filename(void)
745 {
746 return OG(output_start_filename);
747 }
748 /* }}} */
749
750 /* {{{ int php_output_get_start_lineno(void)
751 * Get the line number where output has started */
php_output_get_start_lineno(void)752 PHPAPI int php_output_get_start_lineno(void)
753 {
754 return OG(output_start_lineno);
755 }
756 /* }}} */
757
758 /* {{{ static int php_output_lock_error(int op)
759 * Checks whether an unallowed operation is attempted from within the output handler and issues a fatal error */
php_output_lock_error(int op)760 static inline int php_output_lock_error(int op)
761 {
762 /* if there's no ob active, ob has been stopped */
763 if (op && OG(active) && OG(running)) {
764 /* fatal error */
765 php_output_deactivate();
766 php_error_docref("ref.outcontrol", E_ERROR, "Cannot use output buffering in output buffering display handlers");
767 return 1;
768 }
769 return 0;
770 }
771 /* }}} */
772
773 /* {{{ static php_output_context *php_output_context_init(php_output_context *context, int op)
774 * Initialize a new output context */
php_output_context_init(php_output_context * context,int op)775 static inline php_output_context *php_output_context_init(php_output_context *context, int op)
776 {
777 if (!context) {
778 context = emalloc(sizeof(php_output_context));
779 }
780
781 memset(context, 0, sizeof(php_output_context));
782 context->op = op;
783
784 return context;
785 }
786 /* }}} */
787
788 /* {{{ static void php_output_context_reset(php_output_context *context)
789 * Reset an output context */
php_output_context_reset(php_output_context * context)790 static inline void php_output_context_reset(php_output_context *context)
791 {
792 int op = context->op;
793 php_output_context_dtor(context);
794 memset(context, 0, sizeof(php_output_context));
795 context->op = op;
796 }
797 /* }}} */
798
799 /* {{{ static void php_output_context_feed(php_output_context *context, char *, size_t, size_t)
800 * Feed output contexts input buffer */
php_output_context_feed(php_output_context * context,char * data,size_t size,size_t used,zend_bool free)801 static inline void php_output_context_feed(php_output_context *context, char *data, size_t size, size_t used, zend_bool free)
802 {
803 if (context->in.free && context->in.data) {
804 efree(context->in.data);
805 }
806 context->in.data = data;
807 context->in.used = used;
808 context->in.free = free;
809 context->in.size = size;
810 }
811 /* }}} */
812
813 /* {{{ static void php_output_context_swap(php_output_context *context)
814 * Swap output contexts buffers */
php_output_context_swap(php_output_context * context)815 static inline void php_output_context_swap(php_output_context *context)
816 {
817 if (context->in.free && context->in.data) {
818 efree(context->in.data);
819 }
820 context->in.data = context->out.data;
821 context->in.used = context->out.used;
822 context->in.free = context->out.free;
823 context->in.size = context->out.size;
824 context->out.data = NULL;
825 context->out.used = 0;
826 context->out.free = 0;
827 context->out.size = 0;
828 }
829 /* }}} */
830
831 /* {{{ static void php_output_context_pass(php_output_context *context)
832 * Pass input to output buffer */
php_output_context_pass(php_output_context * context)833 static inline void php_output_context_pass(php_output_context *context)
834 {
835 context->out.data = context->in.data;
836 context->out.used = context->in.used;
837 context->out.size = context->in.size;
838 context->out.free = context->in.free;
839 context->in.data = NULL;
840 context->in.used = 0;
841 context->in.free = 0;
842 context->in.size = 0;
843 }
844 /* }}} */
845
846 /* {{{ static void php_output_context_dtor(php_output_context *context)
847 * Destroy the contents of an output context */
php_output_context_dtor(php_output_context * context)848 static inline void php_output_context_dtor(php_output_context *context)
849 {
850 if (context->in.free && context->in.data) {
851 efree(context->in.data);
852 context->in.data = NULL;
853 }
854 if (context->out.free && context->out.data) {
855 efree(context->out.data);
856 context->out.data = NULL;
857 }
858 }
859 /* }}} */
860
861 /* {{{ static php_output_handler *php_output_handler_init(zval *name, size_t chunk_size, int flags)
862 * Allocates and initializes a php_output_handler structure */
php_output_handler_init(zend_string * name,size_t chunk_size,int flags)863 static inline php_output_handler *php_output_handler_init(zend_string *name, size_t chunk_size, int flags)
864 {
865 php_output_handler *handler;
866
867 handler = ecalloc(1, sizeof(php_output_handler));
868 handler->name = zend_string_copy(name);
869 handler->size = chunk_size;
870 handler->flags = flags;
871 handler->buffer.size = PHP_OUTPUT_HANDLER_INITBUF_SIZE(chunk_size);
872 handler->buffer.data = emalloc(handler->buffer.size);
873
874 return handler;
875 }
876 /* }}} */
877
878 /* {{{ static int php_output_handler_appen(php_output_handler *handler, const php_output_buffer *buf)
879 * Appends input to the output handlers buffer and indicates whether the buffer does not have to be processed by the output handler */
php_output_handler_append(php_output_handler * handler,const php_output_buffer * buf)880 static inline int php_output_handler_append(php_output_handler *handler, const php_output_buffer *buf)
881 {
882 if (buf->used) {
883 OG(flags) |= PHP_OUTPUT_WRITTEN;
884 /* store it away */
885 if ((handler->buffer.size - handler->buffer.used) <= buf->used) {
886 size_t grow_int = PHP_OUTPUT_HANDLER_INITBUF_SIZE(handler->size);
887 size_t grow_buf = PHP_OUTPUT_HANDLER_INITBUF_SIZE(buf->used - (handler->buffer.size - handler->buffer.used));
888 size_t grow_max = MAX(grow_int, grow_buf);
889
890 handler->buffer.data = erealloc(handler->buffer.data, handler->buffer.size + grow_max);
891 handler->buffer.size += grow_max;
892 }
893 memcpy(handler->buffer.data + handler->buffer.used, buf->data, buf->used);
894 handler->buffer.used += buf->used;
895
896 /* chunked buffering */
897 if (handler->size && (handler->buffer.used >= handler->size)) {
898 /* store away errors and/or any intermediate output */
899 return OG(running) ? 1 : 0;
900 }
901 }
902 return 1;
903 }
904 /* }}} */
905
906 /* {{{ static php_output_handler_status_t php_output_handler_op(php_output_handler *handler, php_output_context *context)
907 * Output handler operation dispatcher, applying context op to the php_output_handler handler */
php_output_handler_op(php_output_handler * handler,php_output_context * context)908 static inline php_output_handler_status_t php_output_handler_op(php_output_handler *handler, php_output_context *context)
909 {
910 php_output_handler_status_t status;
911 int original_op = context->op;
912
913 #if PHP_OUTPUT_DEBUG
914 fprintf(stderr, ">>> op(%d, "
915 "handler=%p, "
916 "name=%s, "
917 "flags=%d, "
918 "buffer.data=%s, "
919 "buffer.used=%zu, "
920 "buffer.size=%zu, "
921 "in.data=%s, "
922 "in.used=%zu)\n",
923 context->op,
924 handler,
925 handler->name,
926 handler->flags,
927 handler->buffer.used?handler->buffer.data:"",
928 handler->buffer.used,
929 handler->buffer.size,
930 context->in.used?context->in.data:"",
931 context->in.used
932 );
933 #endif
934
935 if (php_output_lock_error(context->op)) {
936 /* fatal error */
937 return PHP_OUTPUT_HANDLER_FAILURE;
938 }
939
940 /* storable? */
941 if (php_output_handler_append(handler, &context->in) && !context->op) {
942 context->op = original_op;
943 return PHP_OUTPUT_HANDLER_NO_DATA;
944 } else {
945 /* need to start? */
946 if (!(handler->flags & PHP_OUTPUT_HANDLER_STARTED)) {
947 context->op |= PHP_OUTPUT_HANDLER_START;
948 }
949
950 OG(running) = handler;
951 if (handler->flags & PHP_OUTPUT_HANDLER_USER) {
952 zval retval, ob_data, ob_mode;
953
954 ZVAL_STRINGL(&ob_data, handler->buffer.data, handler->buffer.used);
955 ZVAL_LONG(&ob_mode, (zend_long) context->op);
956 zend_fcall_info_argn(&handler->func.user->fci, 2, &ob_data, &ob_mode);
957 zval_ptr_dtor(&ob_data);
958
959 #define PHP_OUTPUT_USER_SUCCESS(retval) ((Z_TYPE(retval) != IS_UNDEF) && !(Z_TYPE(retval) == IS_FALSE))
960 if (SUCCESS == zend_fcall_info_call(&handler->func.user->fci, &handler->func.user->fcc, &retval, NULL) && PHP_OUTPUT_USER_SUCCESS(retval)) {
961 /* user handler may have returned TRUE */
962 status = PHP_OUTPUT_HANDLER_NO_DATA;
963 if (Z_TYPE(retval) != IS_FALSE && Z_TYPE(retval) != IS_TRUE) {
964 convert_to_string_ex(&retval);
965 if (Z_STRLEN(retval)) {
966 context->out.data = estrndup(Z_STRVAL(retval), Z_STRLEN(retval));
967 context->out.used = Z_STRLEN(retval);
968 context->out.free = 1;
969 status = PHP_OUTPUT_HANDLER_SUCCESS;
970 }
971 }
972 } else {
973 /* call failed, pass internal buffer along */
974 status = PHP_OUTPUT_HANDLER_FAILURE;
975 }
976
977 zend_fcall_info_argn(&handler->func.user->fci, 0);
978 zval_ptr_dtor(&retval);
979
980 } else {
981
982 php_output_context_feed(context, handler->buffer.data, handler->buffer.size, handler->buffer.used, 0);
983
984 if (SUCCESS == handler->func.internal(&handler->opaq, context)) {
985 if (context->out.used) {
986 status = PHP_OUTPUT_HANDLER_SUCCESS;
987 } else {
988 status = PHP_OUTPUT_HANDLER_NO_DATA;
989 }
990 } else {
991 status = PHP_OUTPUT_HANDLER_FAILURE;
992 }
993 }
994 handler->flags |= PHP_OUTPUT_HANDLER_STARTED;
995 OG(running) = NULL;
996 }
997
998 switch (status) {
999 case PHP_OUTPUT_HANDLER_FAILURE:
1000 /* disable this handler */
1001 handler->flags |= PHP_OUTPUT_HANDLER_DISABLED;
1002 /* discard any output */
1003 if (context->out.data && context->out.free) {
1004 efree(context->out.data);
1005 }
1006 /* returns handlers buffer */
1007 context->out.data = handler->buffer.data;
1008 context->out.used = handler->buffer.used;
1009 context->out.free = 1;
1010 handler->buffer.data = NULL;
1011 handler->buffer.used = 0;
1012 handler->buffer.size = 0;
1013 break;
1014 case PHP_OUTPUT_HANDLER_NO_DATA:
1015 /* handler ate all */
1016 php_output_context_reset(context);
1017 /* no break */
1018 case PHP_OUTPUT_HANDLER_SUCCESS:
1019 /* no more buffered data */
1020 handler->buffer.used = 0;
1021 handler->flags |= PHP_OUTPUT_HANDLER_PROCESSED;
1022 break;
1023 }
1024
1025 context->op = original_op;
1026 return status;
1027 }
1028 /* }}} */
1029
1030
1031 /* {{{ static void php_output_op(int op, const char *str, size_t len)
1032 * Output op dispatcher, passes input and output handlers output through the output handler stack until it gets written to the SAPI */
php_output_op(int op,const char * str,size_t len)1033 static inline void php_output_op(int op, const char *str, size_t len)
1034 {
1035 php_output_context context;
1036 php_output_handler **active;
1037 int obh_cnt;
1038
1039 if (php_output_lock_error(op)) {
1040 return;
1041 }
1042
1043 php_output_context_init(&context, op);
1044
1045 /*
1046 * broken up for better performance:
1047 * - apply op to the one active handler; note that OG(active) might be popped off the stack on a flush
1048 * - or apply op to the handler stack
1049 */
1050 if (OG(active) && (obh_cnt = zend_stack_count(&OG(handlers)))) {
1051 context.in.data = (char *) str;
1052 context.in.used = len;
1053
1054 if (obh_cnt > 1) {
1055 zend_stack_apply_with_argument(&OG(handlers), ZEND_STACK_APPLY_TOPDOWN, php_output_stack_apply_op, &context);
1056 } else if ((active = zend_stack_top(&OG(handlers))) && (!((*active)->flags & PHP_OUTPUT_HANDLER_DISABLED))) {
1057 php_output_handler_op(*active, &context);
1058 } else {
1059 php_output_context_pass(&context);
1060 }
1061 } else {
1062 context.out.data = (char *) str;
1063 context.out.used = len;
1064 }
1065
1066 if (context.out.data && context.out.used) {
1067 php_output_header();
1068
1069 if (!(OG(flags) & PHP_OUTPUT_DISABLED)) {
1070 #if PHP_OUTPUT_DEBUG
1071 fprintf(stderr, "::: sapi_write('%s', %zu)\n", context.out.data, context.out.used);
1072 #endif
1073 sapi_module.ub_write(context.out.data, context.out.used);
1074
1075 if (OG(flags) & PHP_OUTPUT_IMPLICITFLUSH) {
1076 sapi_flush();
1077 }
1078
1079 OG(flags) |= PHP_OUTPUT_SENT;
1080 }
1081 }
1082 php_output_context_dtor(&context);
1083 }
1084 /* }}} */
1085
1086 /* {{{ static int php_output_stack_apply_op(void *h, void *c)
1087 * Operation callback for the stack apply function */
php_output_stack_apply_op(void * h,void * c)1088 static int php_output_stack_apply_op(void *h, void *c)
1089 {
1090 int was_disabled;
1091 php_output_handler_status_t status;
1092 php_output_handler *handler = *(php_output_handler **) h;
1093 php_output_context *context = (php_output_context *) c;
1094
1095 if ((was_disabled = (handler->flags & PHP_OUTPUT_HANDLER_DISABLED))) {
1096 status = PHP_OUTPUT_HANDLER_FAILURE;
1097 } else {
1098 status = php_output_handler_op(handler, context);
1099 }
1100
1101 /*
1102 * handler ate all => break
1103 * handler returned data or failed resp. is disabled => continue
1104 */
1105 switch (status) {
1106 case PHP_OUTPUT_HANDLER_NO_DATA:
1107 return 1;
1108
1109 case PHP_OUTPUT_HANDLER_SUCCESS:
1110 /* swap contexts buffers, unless this is the last handler in the stack */
1111 if (handler->level) {
1112 php_output_context_swap(context);
1113 }
1114 return 0;
1115
1116 case PHP_OUTPUT_HANDLER_FAILURE:
1117 default:
1118 if (was_disabled) {
1119 /* pass input along, if it's the last handler in the stack */
1120 if (!handler->level) {
1121 php_output_context_pass(context);
1122 }
1123 } else {
1124 /* swap buffers, unless this is the last handler */
1125 if (handler->level) {
1126 php_output_context_swap(context);
1127 }
1128 }
1129 return 0;
1130 }
1131 }
1132 /* }}} */
1133
1134 /* {{{ static int php_output_stack_apply_clean(void *h, void *c)
1135 * Clean callback for the stack apply function */
php_output_stack_apply_clean(void * h,void * c)1136 static int php_output_stack_apply_clean(void *h, void *c)
1137 {
1138 php_output_handler *handler = *(php_output_handler **) h;
1139 php_output_context *context = (php_output_context *) c;
1140
1141 handler->buffer.used = 0;
1142 php_output_handler_op(handler, context);
1143 php_output_context_reset(context);
1144 return 0;
1145 }
1146 /* }}} */
1147
1148 /* {{{ static int php_output_stack_apply_list(void *h, void *z)
1149 * List callback for the stack apply function */
php_output_stack_apply_list(void * h,void * z)1150 static int php_output_stack_apply_list(void *h, void *z)
1151 {
1152 php_output_handler *handler = *(php_output_handler **) h;
1153 zval *array = (zval *) z;
1154
1155 add_next_index_str(array, zend_string_copy(handler->name));
1156 return 0;
1157 }
1158 /* }}} */
1159
1160 /* {{{ static int php_output_stack_apply_status(void *h, void *z)
1161 * Status callback for the stack apply function */
php_output_stack_apply_status(void * h,void * z)1162 static int php_output_stack_apply_status(void *h, void *z)
1163 {
1164 php_output_handler *handler = *(php_output_handler **) h;
1165 zval arr, *array = (zval *) z;
1166
1167 add_next_index_zval(array, php_output_handler_status(handler, &arr));
1168
1169 return 0;
1170 }
1171
1172 /* {{{ static zval *php_output_handler_status(php_output_handler *handler, zval *entry)
1173 * Returns an array with the status of the output handler */
php_output_handler_status(php_output_handler * handler,zval * entry)1174 static inline zval *php_output_handler_status(php_output_handler *handler, zval *entry)
1175 {
1176 ZEND_ASSERT(entry != NULL);
1177
1178 array_init(entry);
1179 add_assoc_str(entry, "name", zend_string_copy(handler->name));
1180 add_assoc_long(entry, "type", (zend_long) (handler->flags & 0xf));
1181 add_assoc_long(entry, "flags", (zend_long) handler->flags);
1182 add_assoc_long(entry, "level", (zend_long) handler->level);
1183 add_assoc_long(entry, "chunk_size", (zend_long) handler->size);
1184 add_assoc_long(entry, "buffer_size", (zend_long) handler->buffer.size);
1185 add_assoc_long(entry, "buffer_used", (zend_long) handler->buffer.used);
1186
1187 return entry;
1188 }
1189 /* }}} */
1190
1191 /* {{{ static int php_output_stack_pop(int flags)
1192 * Pops an output handler off the stack */
php_output_stack_pop(int flags)1193 static inline int php_output_stack_pop(int flags)
1194 {
1195 php_output_context context;
1196 php_output_handler **current, *orphan = OG(active);
1197
1198 if (!orphan) {
1199 if (!(flags & PHP_OUTPUT_POP_SILENT)) {
1200 php_error_docref("ref.outcontrol", E_NOTICE, "failed to %s buffer. No buffer to %s", (flags&PHP_OUTPUT_POP_DISCARD)?"discard":"send", (flags&PHP_OUTPUT_POP_DISCARD)?"discard":"send");
1201 }
1202 return 0;
1203 } else if (!(flags & PHP_OUTPUT_POP_FORCE) && !(orphan->flags & PHP_OUTPUT_HANDLER_REMOVABLE)) {
1204 if (!(flags & PHP_OUTPUT_POP_SILENT)) {
1205 php_error_docref("ref.outcontrol", E_NOTICE, "failed to %s buffer of %s (%d)", (flags&PHP_OUTPUT_POP_DISCARD)?"discard":"send", ZSTR_VAL(orphan->name), orphan->level);
1206 }
1207 return 0;
1208 } else {
1209 php_output_context_init(&context, PHP_OUTPUT_HANDLER_FINAL);
1210
1211 /* don't run the output handler if it's disabled */
1212 if (!(orphan->flags & PHP_OUTPUT_HANDLER_DISABLED)) {
1213 /* didn't it start yet? */
1214 if (!(orphan->flags & PHP_OUTPUT_HANDLER_STARTED)) {
1215 context.op |= PHP_OUTPUT_HANDLER_START;
1216 }
1217 /* signal that we're cleaning up */
1218 if (flags & PHP_OUTPUT_POP_DISCARD) {
1219 context.op |= PHP_OUTPUT_HANDLER_CLEAN;
1220 }
1221 php_output_handler_op(orphan, &context);
1222 }
1223
1224 /* pop it off the stack */
1225 zend_stack_del_top(&OG(handlers));
1226 if ((current = zend_stack_top(&OG(handlers)))) {
1227 OG(active) = *current;
1228 } else {
1229 OG(active) = NULL;
1230 }
1231
1232 /* pass output along */
1233 if (context.out.data && context.out.used && !(flags & PHP_OUTPUT_POP_DISCARD)) {
1234 php_output_write(context.out.data, context.out.used);
1235 }
1236
1237 /* destroy the handler (after write!) */
1238 php_output_handler_free(&orphan);
1239 php_output_context_dtor(&context);
1240
1241 return 1;
1242 }
1243 }
1244 /* }}} */
1245
1246 /* {{{ static SUCCESS|FAILURE php_output_handler_compat_func(void *ctx, php_output_context *)
1247 * php_output_handler_context_func_t for php_output_handler_func_t output handlers */
php_output_handler_compat_func(void ** handler_context,php_output_context * output_context)1248 static int php_output_handler_compat_func(void **handler_context, php_output_context *output_context)
1249 {
1250 php_output_handler_func_t func = *(php_output_handler_func_t *) handler_context;
1251
1252 if (func) {
1253 char *out_str = NULL;
1254 size_t out_len = 0;
1255
1256 func(output_context->in.data, output_context->in.used, &out_str, &out_len, output_context->op);
1257
1258 if (out_str) {
1259 output_context->out.data = out_str;
1260 output_context->out.used = out_len;
1261 output_context->out.free = 1;
1262 } else {
1263 php_output_context_pass(output_context);
1264 }
1265
1266 return SUCCESS;
1267 }
1268 return FAILURE;
1269 }
1270 /* }}} */
1271
1272 /* {{{ static SUCCESS|FAILURE php_output_handler_default_func(void *ctx, php_output_context *)
1273 * Default output handler */
php_output_handler_default_func(void ** handler_context,php_output_context * output_context)1274 static int php_output_handler_default_func(void **handler_context, php_output_context *output_context)
1275 {
1276 php_output_context_pass(output_context);
1277 return SUCCESS;
1278 }
1279 /* }}} */
1280
1281 /* {{{ static SUCCESS|FAILURE php_output_handler_devnull_func(void *ctx, php_output_context *)
1282 * Null output handler */
php_output_handler_devnull_func(void ** handler_context,php_output_context * output_context)1283 static int php_output_handler_devnull_func(void **handler_context, php_output_context *output_context)
1284 {
1285 return SUCCESS;
1286 }
1287 /* }}} */
1288
1289 /*
1290 * USERLAND (nearly 1:1 of old output.c)
1291 */
1292
1293 /* {{{ proto bool ob_start([string|array user_function [, int chunk_size [, int flags]]])
1294 Turn on Output Buffering (specifying an optional output handler). */
PHP_FUNCTION(ob_start)1295 PHP_FUNCTION(ob_start)
1296 {
1297 zval *output_handler = NULL;
1298 zend_long chunk_size = 0;
1299 zend_long flags = PHP_OUTPUT_HANDLER_STDFLAGS;
1300
1301 if (zend_parse_parameters(ZEND_NUM_ARGS(), "|z/ll", &output_handler, &chunk_size, &flags) == FAILURE) {
1302 return;
1303 }
1304
1305 if (chunk_size < 0) {
1306 chunk_size = 0;
1307 }
1308
1309 if (php_output_start_user(output_handler, chunk_size, flags) == FAILURE) {
1310 php_error_docref("ref.outcontrol", E_NOTICE, "failed to create buffer");
1311 RETURN_FALSE;
1312 }
1313 RETURN_TRUE;
1314 }
1315 /* }}} */
1316
1317 /* {{{ proto bool ob_flush(void)
1318 Flush (send) contents of the output buffer. The last buffer content is sent to next buffer */
PHP_FUNCTION(ob_flush)1319 PHP_FUNCTION(ob_flush)
1320 {
1321 if (zend_parse_parameters_none() == FAILURE) {
1322 return;
1323 }
1324
1325 if (!OG(active)) {
1326 php_error_docref("ref.outcontrol", E_NOTICE, "failed to flush buffer. No buffer to flush");
1327 RETURN_FALSE;
1328 }
1329
1330 if (SUCCESS != php_output_flush()) {
1331 php_error_docref("ref.outcontrol", E_NOTICE, "failed to flush buffer of %s (%d)", ZSTR_VAL(OG(active)->name), OG(active)->level);
1332 RETURN_FALSE;
1333 }
1334 RETURN_TRUE;
1335 }
1336 /* }}} */
1337
1338 /* {{{ proto bool ob_clean(void)
1339 Clean (delete) the current output buffer */
PHP_FUNCTION(ob_clean)1340 PHP_FUNCTION(ob_clean)
1341 {
1342 if (zend_parse_parameters_none() == FAILURE) {
1343 return;
1344 }
1345
1346 if (!OG(active)) {
1347 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete buffer. No buffer to delete");
1348 RETURN_FALSE;
1349 }
1350
1351 if (SUCCESS != php_output_clean()) {
1352 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete buffer of %s (%d)", ZSTR_VAL(OG(active)->name), OG(active)->level);
1353 RETURN_FALSE;
1354 }
1355 RETURN_TRUE;
1356 }
1357 /* }}} */
1358
1359 /* {{{ proto bool ob_end_flush(void)
1360 Flush (send) the output buffer, and delete current output buffer */
PHP_FUNCTION(ob_end_flush)1361 PHP_FUNCTION(ob_end_flush)
1362 {
1363 if (zend_parse_parameters_none() == FAILURE) {
1364 return;
1365 }
1366
1367 if (!OG(active)) {
1368 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete and flush buffer. No buffer to delete or flush");
1369 RETURN_FALSE;
1370 }
1371
1372 RETURN_BOOL(SUCCESS == php_output_end());
1373 }
1374 /* }}} */
1375
1376 /* {{{ proto bool ob_end_clean(void)
1377 Clean the output buffer, and delete current output buffer */
PHP_FUNCTION(ob_end_clean)1378 PHP_FUNCTION(ob_end_clean)
1379 {
1380 if (zend_parse_parameters_none() == FAILURE) {
1381 return;
1382 }
1383
1384 if (!OG(active)) {
1385 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete buffer. No buffer to delete");
1386 RETURN_FALSE;
1387 }
1388
1389 RETURN_BOOL(SUCCESS == php_output_discard());
1390 }
1391 /* }}} */
1392
1393 /* {{{ proto bool ob_get_flush(void)
1394 Get current buffer contents, flush (send) the output buffer, and delete current output buffer */
PHP_FUNCTION(ob_get_flush)1395 PHP_FUNCTION(ob_get_flush)
1396 {
1397 if (zend_parse_parameters_none() == FAILURE) {
1398 return;
1399 }
1400
1401 if (php_output_get_contents(return_value) == FAILURE) {
1402 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete and flush buffer. No buffer to delete or flush");
1403 RETURN_FALSE;
1404 }
1405
1406 if (SUCCESS != php_output_end()) {
1407 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete buffer of %s (%d)", ZSTR_VAL(OG(active)->name), OG(active)->level);
1408 }
1409 }
1410 /* }}} */
1411
1412 /* {{{ proto bool ob_get_clean(void)
1413 Get current buffer contents and delete current output buffer */
PHP_FUNCTION(ob_get_clean)1414 PHP_FUNCTION(ob_get_clean)
1415 {
1416 if (zend_parse_parameters_none() == FAILURE) {
1417 return;
1418 }
1419
1420 if(!OG(active)) {
1421 RETURN_FALSE;
1422 }
1423
1424 if (php_output_get_contents(return_value) == FAILURE) {
1425 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete buffer. No buffer to delete");
1426 RETURN_FALSE;
1427 }
1428
1429 if (SUCCESS != php_output_discard()) {
1430 php_error_docref("ref.outcontrol", E_NOTICE, "failed to delete buffer of %s (%d)", ZSTR_VAL(OG(active)->name), OG(active)->level);
1431 }
1432 }
1433 /* }}} */
1434
1435 /* {{{ proto string ob_get_contents(void)
1436 Return the contents of the output buffer */
PHP_FUNCTION(ob_get_contents)1437 PHP_FUNCTION(ob_get_contents)
1438 {
1439 if (zend_parse_parameters_none() == FAILURE) {
1440 return;
1441 }
1442
1443 if (php_output_get_contents(return_value) == FAILURE) {
1444 RETURN_FALSE;
1445 }
1446 }
1447 /* }}} */
1448
1449 /* {{{ proto int ob_get_level(void)
1450 Return the nesting level of the output buffer */
PHP_FUNCTION(ob_get_level)1451 PHP_FUNCTION(ob_get_level)
1452 {
1453 if (zend_parse_parameters_none() == FAILURE) {
1454 return;
1455 }
1456
1457 RETURN_LONG(php_output_get_level());
1458 }
1459 /* }}} */
1460
1461 /* {{{ proto int ob_get_length(void)
1462 Return the length of the output buffer */
PHP_FUNCTION(ob_get_length)1463 PHP_FUNCTION(ob_get_length)
1464 {
1465 if (zend_parse_parameters_none() == FAILURE) {
1466 return;
1467 }
1468
1469 if (php_output_get_length(return_value) == FAILURE) {
1470 RETURN_FALSE;
1471 }
1472 }
1473 /* }}} */
1474
1475 /* {{{ proto false|array ob_list_handlers()
1476 List all output_buffers in an array */
PHP_FUNCTION(ob_list_handlers)1477 PHP_FUNCTION(ob_list_handlers)
1478 {
1479 if (zend_parse_parameters_none() == FAILURE) {
1480 return;
1481 }
1482
1483 array_init(return_value);
1484
1485 if (!OG(active)) {
1486 return;
1487 }
1488
1489 zend_stack_apply_with_argument(&OG(handlers), ZEND_STACK_APPLY_BOTTOMUP, php_output_stack_apply_list, return_value);
1490 }
1491 /* }}} */
1492
1493 /* {{{ proto false|array ob_get_status([bool full_status])
1494 Return the status of the active or all output buffers */
PHP_FUNCTION(ob_get_status)1495 PHP_FUNCTION(ob_get_status)
1496 {
1497 zend_bool full_status = 0;
1498
1499 if (zend_parse_parameters(ZEND_NUM_ARGS(), "|b", &full_status) == FAILURE) {
1500 return;
1501 }
1502
1503 if (!OG(active)) {
1504 array_init(return_value);
1505 return;
1506 }
1507
1508 if (full_status) {
1509 array_init(return_value);
1510 zend_stack_apply_with_argument(&OG(handlers), ZEND_STACK_APPLY_BOTTOMUP, php_output_stack_apply_status, return_value);
1511 } else {
1512 php_output_handler_status(OG(active), return_value);
1513 }
1514 }
1515 /* }}} */
1516
1517 /* {{{ proto void ob_implicit_flush([int flag])
1518 Turn implicit flush on/off and is equivalent to calling flush() after every output call */
PHP_FUNCTION(ob_implicit_flush)1519 PHP_FUNCTION(ob_implicit_flush)
1520 {
1521 zend_long flag = 1;
1522
1523 if (zend_parse_parameters(ZEND_NUM_ARGS(), "|l", &flag) == FAILURE) {
1524 return;
1525 }
1526
1527 php_output_set_implicit_flush(flag);
1528 }
1529 /* }}} */
1530
1531 /* {{{ proto bool output_reset_rewrite_vars(void)
1532 Reset(clear) URL rewriter values */
PHP_FUNCTION(output_reset_rewrite_vars)1533 PHP_FUNCTION(output_reset_rewrite_vars)
1534 {
1535 if (php_url_scanner_reset_vars() == SUCCESS) {
1536 RETURN_TRUE;
1537 } else {
1538 RETURN_FALSE;
1539 }
1540 }
1541 /* }}} */
1542
1543 /* {{{ proto bool output_add_rewrite_var(string name, string value)
1544 Add URL rewriter values */
PHP_FUNCTION(output_add_rewrite_var)1545 PHP_FUNCTION(output_add_rewrite_var)
1546 {
1547 char *name, *value;
1548 size_t name_len, value_len;
1549
1550 if (zend_parse_parameters(ZEND_NUM_ARGS(), "ss", &name, &name_len, &value, &value_len) == FAILURE) {
1551 return;
1552 }
1553
1554 if (php_url_scanner_add_var(name, name_len, value, value_len, 1) == SUCCESS) {
1555 RETURN_TRUE;
1556 } else {
1557 RETURN_FALSE;
1558 }
1559 }
1560 /* }}} */
1561
1562 /*
1563 * Local variables:
1564 * tab-width: 4
1565 * c-basic-offset: 4
1566 * End:
1567 * vim600: sw=4 ts=4 fdm=marker
1568 * vim<600: sw=4 ts=4
1569 */
1570
