xref: /PHP-5.5/main/streams/memory.c (revision 6297a117)
1 /*
2    +----------------------------------------------------------------------+
3    | PHP Version 5                                                        |
4    +----------------------------------------------------------------------+
5    | Copyright (c) 1997-2015 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    | Author: Marcus Boerger <helly@php.net>                               |
16    +----------------------------------------------------------------------+
17  */
18 
19 /* $Id$ */
20 
21 #define _GNU_SOURCE
22 #include "php.h"
23 
24 PHPAPI int php_url_decode(char *str, int len);
25 PHPAPI unsigned char *php_base64_decode(const unsigned char *str, int length, int *ret_length);
26 
27 /* Memory streams use a dynamic memory buffer to emulate a stream.
28  * You can use php_stream_memory_open to create a readonly stream
29  * from an existing memory buffer.
30  */
31 
32 /* Temp streams are streams that uses memory streams as long their
33  * size is less than a given memory amount. When a write operation
34  * exceeds that limit the content is written to a temporary file.
35  */
36 
37 /* {{{ ------- MEMORY stream implementation -------*/
38 
39 typedef struct {
40 	char        *data;
41 	size_t      fpos;
42 	size_t      fsize;
43 	size_t      smax;
44 	int			mode;
45 } php_stream_memory_data;
46 
47 
48 /* {{{ */
php_stream_memory_write(php_stream * stream,const char * buf,size_t count TSRMLS_DC)49 static size_t php_stream_memory_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC)
50 {
51 	php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
52 	assert(ms != NULL);
53 
54 	if (ms->mode & TEMP_STREAM_READONLY) {
55 		return 0;
56 	}
57 	if (ms->fpos + count > ms->fsize) {
58 		char *tmp;
59 
60 		if (!ms->data) {
61 			tmp = emalloc(ms->fpos + count);
62 		} else {
63 			tmp = erealloc(ms->data, ms->fpos + count);
64 		}
65 		if (!tmp) {
66 			count = ms->fsize - ms->fpos + 1;
67 		} else {
68 			ms->data = tmp;
69 			ms->fsize = ms->fpos + count;
70 		}
71 	}
72 	if (!ms->data)
73 		count = 0;
74 	if (count) {
75 		assert(buf!= NULL);
76 		memcpy(ms->data+ms->fpos, (char*)buf, count);
77 		ms->fpos += count;
78 	}
79 	return count;
80 }
81 /* }}} */
82 
83 
84 /* {{{ */
php_stream_memory_read(php_stream * stream,char * buf,size_t count TSRMLS_DC)85 static size_t php_stream_memory_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
86 {
87 	php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
88 	assert(ms != NULL);
89 
90 	if (ms->fpos == ms->fsize) {
91 		stream->eof = 1;
92 		count = 0;
93 	} else {
94 		if (ms->fpos + count >= ms->fsize) {
95 			count = ms->fsize - ms->fpos;
96 		}
97 		if (count) {
98 			assert(ms->data!= NULL);
99 			assert(buf!= NULL);
100 			memcpy(buf, ms->data+ms->fpos, count);
101 			ms->fpos += count;
102 		}
103 	}
104 	return count;
105 }
106 /* }}} */
107 
108 
109 /* {{{ */
php_stream_memory_close(php_stream * stream,int close_handle TSRMLS_DC)110 static int php_stream_memory_close(php_stream *stream, int close_handle TSRMLS_DC)
111 {
112 	php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
113 	assert(ms != NULL);
114 
115 	if (ms->data && close_handle && ms->mode != TEMP_STREAM_READONLY) {
116 		efree(ms->data);
117 	}
118 	efree(ms);
119 	return 0;
120 }
121 /* }}} */
122 
123 
124 /* {{{ */
php_stream_memory_flush(php_stream * stream TSRMLS_DC)125 static int php_stream_memory_flush(php_stream *stream TSRMLS_DC)
126 {
127 	/* nothing to do here */
128 	return 0;
129 }
130 /* }}} */
131 
132 
133 /* {{{ */
php_stream_memory_seek(php_stream * stream,off_t offset,int whence,off_t * newoffs TSRMLS_DC)134 static int php_stream_memory_seek(php_stream *stream, off_t offset, int whence, off_t *newoffs TSRMLS_DC)
135 {
136 	php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
137 	assert(ms != NULL);
138 
139 	switch(whence) {
140 		case SEEK_CUR:
141 			if (offset < 0) {
142 				if (ms->fpos < (size_t)(-offset)) {
143 					ms->fpos = 0;
144 					*newoffs = -1;
145 					return -1;
146 				} else {
147 					ms->fpos = ms->fpos + offset;
148 					*newoffs = ms->fpos;
149 					stream->eof = 0;
150 					return 0;
151 				}
152 			} else {
153 				if (ms->fpos + (size_t)(offset) > ms->fsize) {
154 					ms->fpos = ms->fsize;
155 					*newoffs = -1;
156 					return -1;
157 				} else {
158 					ms->fpos = ms->fpos + offset;
159 					*newoffs = ms->fpos;
160 					stream->eof = 0;
161 					return 0;
162 				}
163 			}
164 		case SEEK_SET:
165 			if (ms->fsize < (size_t)(offset)) {
166 				ms->fpos = ms->fsize;
167 				*newoffs = -1;
168 				return -1;
169 			} else {
170 				ms->fpos = offset;
171 				*newoffs = ms->fpos;
172 				stream->eof = 0;
173 				return 0;
174 			}
175 		case SEEK_END:
176 			if (offset > 0) {
177 				ms->fpos = ms->fsize;
178 				*newoffs = -1;
179 				return -1;
180 			} else if (ms->fsize < (size_t)(-offset)) {
181 				ms->fpos = 0;
182 				*newoffs = -1;
183 				return -1;
184 			} else {
185 				ms->fpos = ms->fsize + offset;
186 				*newoffs = ms->fpos;
187 				stream->eof = 0;
188 				return 0;
189 			}
190 		default:
191 			*newoffs = ms->fpos;
192 			return -1;
193 	}
194 }
195 /* }}} */
196 
197 /* {{{ */
php_stream_memory_cast(php_stream * stream,int castas,void ** ret TSRMLS_DC)198 static int php_stream_memory_cast(php_stream *stream, int castas, void **ret TSRMLS_DC)
199 {
200 	return FAILURE;
201 }
202 /* }}} */
203 
php_stream_memory_stat(php_stream * stream,php_stream_statbuf * ssb TSRMLS_DC)204 static int php_stream_memory_stat(php_stream *stream, php_stream_statbuf *ssb TSRMLS_DC) /* {{{ */
205 {
206 	time_t timestamp = 0;
207 	php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
208 	assert(ms != NULL);
209 
210 	memset(ssb, 0, sizeof(php_stream_statbuf));
211 	/* read-only across the board */
212 
213 	ssb->sb.st_mode = ms->mode & TEMP_STREAM_READONLY ? 0444 : 0666;
214 
215 	ssb->sb.st_size = ms->fsize;
216 	ssb->sb.st_mode |= S_IFREG; /* regular file */
217 
218 #ifdef NETWARE
219 	ssb->sb.st_mtime.tv_sec = timestamp;
220 	ssb->sb.st_atime.tv_sec = timestamp;
221 	ssb->sb.st_ctime.tv_sec = timestamp;
222 #else
223 	ssb->sb.st_mtime = timestamp;
224 	ssb->sb.st_atime = timestamp;
225 	ssb->sb.st_ctime = timestamp;
226 #endif
227 
228 	ssb->sb.st_nlink = 1;
229 	ssb->sb.st_rdev = -1;
230 	/* this is only for APC, so use /dev/null device - no chance of conflict there! */
231 	ssb->sb.st_dev = 0xC;
232 	/* generate unique inode number for alias/filename, so no phars will conflict */
233 	ssb->sb.st_ino = 0;
234 
235 #ifndef PHP_WIN32
236 	ssb->sb.st_blksize = -1;
237 #endif
238 
239 #if !defined(PHP_WIN32) && !defined(__BEOS__)
240 	ssb->sb.st_blocks = -1;
241 #endif
242 
243 	return 0;
244 }
245 /* }}} */
246 
php_stream_memory_set_option(php_stream * stream,int option,int value,void * ptrparam TSRMLS_DC)247 static int php_stream_memory_set_option(php_stream *stream, int option, int value, void *ptrparam TSRMLS_DC) /* {{{ */
248 {
249 	php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
250 	size_t newsize;
251 
252 	switch(option) {
253 		case PHP_STREAM_OPTION_TRUNCATE_API:
254 			switch (value) {
255 				case PHP_STREAM_TRUNCATE_SUPPORTED:
256 					return PHP_STREAM_OPTION_RETURN_OK;
257 
258 				case PHP_STREAM_TRUNCATE_SET_SIZE:
259 					if (ms->mode & TEMP_STREAM_READONLY) {
260 						return PHP_STREAM_OPTION_RETURN_ERR;
261 					}
262 					newsize = *(size_t*)ptrparam;
263 					if (newsize <= ms->fsize) {
264 						if (newsize < ms->fpos) {
265 							ms->fpos = newsize;
266 						}
267 					} else {
268 						ms->data = erealloc(ms->data, newsize);
269 						memset(ms->data+ms->fsize, 0, newsize - ms->fsize);
270 						ms->fsize = newsize;
271 					}
272 					ms->fsize = newsize;
273 					return PHP_STREAM_OPTION_RETURN_OK;
274 			}
275 		default:
276 			return PHP_STREAM_OPTION_RETURN_NOTIMPL;
277 	}
278 }
279 /* }}} */
280 
281 PHPAPI php_stream_ops	php_stream_memory_ops = {
282 	php_stream_memory_write, php_stream_memory_read,
283 	php_stream_memory_close, php_stream_memory_flush,
284 	"MEMORY",
285 	php_stream_memory_seek,
286 	php_stream_memory_cast,
287 	php_stream_memory_stat,
288 	php_stream_memory_set_option
289 };
290 
291 
292 /* {{{ */
_php_stream_memory_create(int mode STREAMS_DC TSRMLS_DC)293 PHPAPI php_stream *_php_stream_memory_create(int mode STREAMS_DC TSRMLS_DC)
294 {
295 	php_stream_memory_data *self;
296 	php_stream *stream;
297 
298 	self = emalloc(sizeof(*self));
299 	self->data = NULL;
300 	self->fpos = 0;
301 	self->fsize = 0;
302 	self->smax = ~0u;
303 	self->mode = mode;
304 
305 	stream = php_stream_alloc_rel(&php_stream_memory_ops, self, 0, mode & TEMP_STREAM_READONLY ? "rb" : "w+b");
306 	stream->flags |= PHP_STREAM_FLAG_NO_BUFFER;
307 	return stream;
308 }
309 /* }}} */
310 
311 
312 /* {{{ */
_php_stream_memory_open(int mode,char * buf,size_t length STREAMS_DC TSRMLS_DC)313 PHPAPI php_stream *_php_stream_memory_open(int mode, char *buf, size_t length STREAMS_DC TSRMLS_DC)
314 {
315 	php_stream *stream;
316 	php_stream_memory_data *ms;
317 
318 	if ((stream = php_stream_memory_create_rel(mode)) != NULL) {
319 		ms = (php_stream_memory_data*)stream->abstract;
320 
321 		if (mode == TEMP_STREAM_READONLY || mode == TEMP_STREAM_TAKE_BUFFER) {
322 			/* use the buffer directly */
323 			ms->data = buf;
324 			ms->fsize = length;
325 		} else {
326 			if (length) {
327 				assert(buf != NULL);
328 				php_stream_write(stream, buf, length);
329 			}
330 		}
331 	}
332 	return stream;
333 }
334 /* }}} */
335 
336 
337 /* {{{ */
_php_stream_memory_get_buffer(php_stream * stream,size_t * length STREAMS_DC TSRMLS_DC)338 PHPAPI char *_php_stream_memory_get_buffer(php_stream *stream, size_t *length STREAMS_DC TSRMLS_DC)
339 {
340 	php_stream_memory_data *ms = (php_stream_memory_data*)stream->abstract;
341 
342 	assert(ms != NULL);
343 	assert(length != 0);
344 
345 	*length = ms->fsize;
346 	return ms->data;
347 }
348 /* }}} */
349 
350 /* }}} */
351 
352 /* {{{ ------- TEMP stream implementation -------*/
353 
354 typedef struct {
355 	php_stream  *innerstream;
356 	size_t      smax;
357 	int			mode;
358 	zval*       meta;
359 } php_stream_temp_data;
360 
361 
362 /* {{{ */
php_stream_temp_write(php_stream * stream,const char * buf,size_t count TSRMLS_DC)363 static size_t php_stream_temp_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC)
364 {
365 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
366 	assert(ts != NULL);
367 
368 	if (!ts->innerstream) {
369 		return -1;
370 	}
371 	if (php_stream_is(ts->innerstream, PHP_STREAM_IS_MEMORY)) {
372 		size_t memsize;
373 		char *membuf = php_stream_memory_get_buffer(ts->innerstream, &memsize);
374 
375 		if (memsize + count >= ts->smax) {
376 			php_stream *file = php_stream_fopen_tmpfile();
377 			if (file == NULL) {
378 				php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to create temporary file, Check permissions in temporary files directory.");
379 				return 0;
380 			}
381 			php_stream_write(file, membuf, memsize);
382 			php_stream_free_enclosed(ts->innerstream, PHP_STREAM_FREE_CLOSE);
383 			ts->innerstream = file;
384 			php_stream_encloses(stream, ts->innerstream);
385 		}
386 	}
387 	return php_stream_write(ts->innerstream, buf, count);
388 }
389 /* }}} */
390 
391 
392 /* {{{ */
php_stream_temp_read(php_stream * stream,char * buf,size_t count TSRMLS_DC)393 static size_t php_stream_temp_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
394 {
395 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
396 	size_t got;
397 
398 	assert(ts != NULL);
399 
400 	if (!ts->innerstream) {
401 		return -1;
402 	}
403 
404 	got = php_stream_read(ts->innerstream, buf, count);
405 
406 	stream->eof = ts->innerstream->eof;
407 
408 	return got;
409 }
410 /* }}} */
411 
412 
413 /* {{{ */
php_stream_temp_close(php_stream * stream,int close_handle TSRMLS_DC)414 static int php_stream_temp_close(php_stream *stream, int close_handle TSRMLS_DC)
415 {
416 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
417 	int ret;
418 
419 	assert(ts != NULL);
420 
421 	if (ts->innerstream) {
422 		ret = php_stream_free_enclosed(ts->innerstream, PHP_STREAM_FREE_CLOSE | (close_handle ? 0 : PHP_STREAM_FREE_PRESERVE_HANDLE));
423 	} else {
424 		ret = 0;
425 	}
426 
427 	if (ts->meta) {
428 		zval_ptr_dtor(&ts->meta);
429 	}
430 
431 	efree(ts);
432 
433 	return ret;
434 }
435 /* }}} */
436 
437 
438 /* {{{ */
php_stream_temp_flush(php_stream * stream TSRMLS_DC)439 static int php_stream_temp_flush(php_stream *stream TSRMLS_DC)
440 {
441 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
442 	assert(ts != NULL);
443 
444 	return ts->innerstream ? php_stream_flush(ts->innerstream) : -1;
445 }
446 /* }}} */
447 
448 
449 /* {{{ */
php_stream_temp_seek(php_stream * stream,off_t offset,int whence,off_t * newoffs TSRMLS_DC)450 static int php_stream_temp_seek(php_stream *stream, off_t offset, int whence, off_t *newoffs TSRMLS_DC)
451 {
452 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
453 	int ret;
454 
455 	assert(ts != NULL);
456 
457 	if (!ts->innerstream) {
458 		*newoffs = -1;
459 		return -1;
460 	}
461 	ret = php_stream_seek(ts->innerstream, offset, whence);
462 	*newoffs = php_stream_tell(ts->innerstream);
463 	stream->eof = ts->innerstream->eof;
464 
465 	return ret;
466 }
467 /* }}} */
468 
469 /* {{{ */
php_stream_temp_cast(php_stream * stream,int castas,void ** ret TSRMLS_DC)470 static int php_stream_temp_cast(php_stream *stream, int castas, void **ret TSRMLS_DC)
471 {
472 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
473 	php_stream *file;
474 	size_t memsize;
475 	char *membuf;
476 	off_t pos;
477 
478 	assert(ts != NULL);
479 
480 	if (!ts->innerstream) {
481 		return FAILURE;
482 	}
483 	if (php_stream_is(ts->innerstream, PHP_STREAM_IS_STDIO)) {
484 		return php_stream_cast(ts->innerstream, castas, ret, 0);
485 	}
486 
487 	/* we are still using a memory based backing. If they are if we can be
488 	 * a FILE*, say yes because we can perform the conversion.
489 	 * If they actually want to perform the conversion, we need to switch
490 	 * the memory stream to a tmpfile stream */
491 
492 	if (ret == NULL && castas == PHP_STREAM_AS_STDIO) {
493 		return SUCCESS;
494 	}
495 
496 	/* say "no" to other stream forms */
497 	if (ret == NULL) {
498 		return FAILURE;
499 	}
500 
501 	/* perform the conversion and then pass the request on to the innerstream */
502 	membuf = php_stream_memory_get_buffer(ts->innerstream, &memsize);
503 	file = php_stream_fopen_tmpfile();
504 	php_stream_write(file, membuf, memsize);
505 	pos = php_stream_tell(ts->innerstream);
506 
507 	php_stream_free_enclosed(ts->innerstream, PHP_STREAM_FREE_CLOSE);
508 	ts->innerstream = file;
509 	php_stream_encloses(stream, ts->innerstream);
510 	php_stream_seek(ts->innerstream, pos, SEEK_SET);
511 
512 	return php_stream_cast(ts->innerstream, castas, ret, 1);
513 }
514 /* }}} */
515 
php_stream_temp_stat(php_stream * stream,php_stream_statbuf * ssb TSRMLS_DC)516 static int php_stream_temp_stat(php_stream *stream, php_stream_statbuf *ssb TSRMLS_DC) /* {{{ */
517 {
518 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
519 
520 	if (!ts || !ts->innerstream) {
521 		return -1;
522 	}
523 	return php_stream_stat(ts->innerstream, ssb);
524 }
525 /* }}} */
526 
php_stream_temp_set_option(php_stream * stream,int option,int value,void * ptrparam TSRMLS_DC)527 static int php_stream_temp_set_option(php_stream *stream, int option, int value, void *ptrparam TSRMLS_DC) /* {{{ */
528 {
529 	php_stream_temp_data *ts = (php_stream_temp_data*)stream->abstract;
530 
531 	switch(option) {
532 		case PHP_STREAM_OPTION_META_DATA_API:
533 			if (ts->meta) {
534 				zend_hash_copy(Z_ARRVAL_P((zval*)ptrparam), Z_ARRVAL_P(ts->meta), (copy_ctor_func_t) zval_add_ref, NULL, sizeof(zval*));
535 			}
536 			return PHP_STREAM_OPTION_RETURN_OK;
537 		default:
538 			if (ts->innerstream) {
539 				return php_stream_set_option(ts->innerstream, option, value, ptrparam);
540 			}
541 			return PHP_STREAM_OPTION_RETURN_NOTIMPL;
542 	}
543 }
544 /* }}} */
545 
546 PHPAPI php_stream_ops	php_stream_temp_ops = {
547 	php_stream_temp_write, php_stream_temp_read,
548 	php_stream_temp_close, php_stream_temp_flush,
549 	"TEMP",
550 	php_stream_temp_seek,
551 	php_stream_temp_cast,
552 	php_stream_temp_stat,
553 	php_stream_temp_set_option
554 };
555 
556 /* }}} */
557 
558 /* {{{ _php_stream_temp_create */
_php_stream_temp_create(int mode,size_t max_memory_usage STREAMS_DC TSRMLS_DC)559 PHPAPI php_stream *_php_stream_temp_create(int mode, size_t max_memory_usage STREAMS_DC TSRMLS_DC)
560 {
561 	php_stream_temp_data *self;
562 	php_stream *stream;
563 
564 	self = ecalloc(1, sizeof(*self));
565 	self->smax = max_memory_usage;
566 	self->mode = mode;
567 	self->meta = NULL;
568 	stream = php_stream_alloc_rel(&php_stream_temp_ops, self, 0, mode & TEMP_STREAM_READONLY ? "rb" : "w+b");
569 	stream->flags |= PHP_STREAM_FLAG_NO_BUFFER;
570 	self->innerstream = php_stream_memory_create_rel(mode);
571 	php_stream_encloses(stream, self->innerstream);
572 
573 	return stream;
574 }
575 /* }}} */
576 
577 
578 /* {{{ _php_stream_temp_open */
_php_stream_temp_open(int mode,size_t max_memory_usage,char * buf,size_t length STREAMS_DC TSRMLS_DC)579 PHPAPI php_stream *_php_stream_temp_open(int mode, size_t max_memory_usage, char *buf, size_t length STREAMS_DC TSRMLS_DC)
580 {
581 	php_stream *stream;
582 	php_stream_temp_data *ts;
583 	off_t newoffs;
584 
585 	if ((stream = php_stream_temp_create_rel(mode, max_memory_usage)) != NULL) {
586 		if (length) {
587 			assert(buf != NULL);
588 			php_stream_temp_write(stream, buf, length TSRMLS_CC);
589 			php_stream_temp_seek(stream, 0, SEEK_SET, &newoffs TSRMLS_CC);
590 		}
591 		ts = (php_stream_temp_data*)stream->abstract;
592 		assert(ts != NULL);
593 		ts->mode = mode;
594 	}
595 	return stream;
596 }
597 /* }}} */
598 
599 PHPAPI php_stream_ops php_stream_rfc2397_ops = {
600 	php_stream_temp_write, php_stream_temp_read,
601 	php_stream_temp_close, php_stream_temp_flush,
602 	"RFC2397",
603 	php_stream_temp_seek,
604 	php_stream_temp_cast,
605 	php_stream_temp_stat,
606 	php_stream_temp_set_option
607 };
608 
php_stream_url_wrap_rfc2397(php_stream_wrapper * wrapper,char * path,char * mode,int options,char ** opened_path,php_stream_context * context STREAMS_DC TSRMLS_DC)609 static php_stream * php_stream_url_wrap_rfc2397(php_stream_wrapper *wrapper, char *path, char *mode, int options, char **opened_path, php_stream_context *context STREAMS_DC TSRMLS_DC) /* {{{ */
610 {
611 	php_stream *stream;
612 	php_stream_temp_data *ts;
613 	char *comma, *semi, *sep, *key;
614 	size_t mlen, dlen, plen, vlen;
615 	off_t newoffs;
616 	zval *meta = NULL;
617 	int base64 = 0, ilen;
618 
619 	if (memcmp(path, "data:", 5)) {
620 		return NULL;
621 	}
622 
623 	path += 5;
624 	dlen = strlen(path);
625 
626 	if (dlen >= 2 && path[0] == '/' && path[1] == '/') {
627 		dlen -= 2;
628 		path += 2;
629 	}
630 
631 	if ((comma = memchr(path, ',', dlen)) == NULL) {
632 		php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "rfc2397: no comma in URL");
633 		return NULL;
634 	}
635 
636 	if (comma != path) {
637 		/* meta info */
638 		mlen = comma - path;
639 		dlen -= mlen;
640 		semi = memchr(path, ';', mlen);
641 		sep = memchr(path, '/', mlen);
642 
643 		if (!semi && !sep) {
644 			php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "rfc2397: illegal media type");
645 			return NULL;
646 		}
647 
648 		MAKE_STD_ZVAL(meta);
649 		array_init(meta);
650 		if (!semi) { /* there is only a mime type */
651 			add_assoc_stringl(meta, "mediatype", path, mlen, 1);
652 			mlen = 0;
653 		} else if (sep && sep < semi) { /* there is a mime type */
654 			plen = semi - path;
655 			add_assoc_stringl(meta, "mediatype", path, plen, 1);
656 			mlen -= plen;
657 			path += plen;
658 		} else if (semi != path || mlen != sizeof(";base64")-1 || memcmp(path, ";base64", sizeof(";base64")-1)) { /* must be error since parameters are only allowed after mediatype */
659 			zval_ptr_dtor(&meta);
660 			php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "rfc2397: illegal media type");
661 			return NULL;
662 		}
663 		/* get parameters and potentially ';base64' */
664 		while(semi && (semi == path)) {
665 			path++;
666 			mlen--;
667 			sep = memchr(path, '=', mlen);
668 			semi = memchr(path, ';', mlen);
669 			if (!sep || (semi && semi < sep)) { /* must be ';base64' or failure */
670 				if (mlen != sizeof("base64")-1 || memcmp(path, "base64", sizeof("base64")-1)) {
671 					/* must be error since parameters are only allowed after mediatype and we have no '=' sign */
672 					zval_ptr_dtor(&meta);
673 					php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "rfc2397: illegal parameter");
674 					return NULL;
675 				}
676 				base64 = 1;
677 				mlen -= sizeof("base64") - 1;
678 				path += sizeof("base64") - 1;
679 				break;
680 			}
681 			/* found parameter ... the heart of cs ppl lies in +1/-1 or was it +2 this time? */
682 			plen = sep - path;
683 			vlen = (semi ? semi - sep : mlen - plen) - 1 /* '=' */;
684 			key = estrndup(path, plen);
685 			if (plen != sizeof("mediatype")-1 || memcmp(key, "mediatype", sizeof("mediatype")-1)) {
686 				add_assoc_stringl_ex(meta, key, plen + 1, sep + 1, vlen, 1);
687 			}
688 			efree(key);
689 			plen += vlen + 1;
690 			mlen -= plen;
691 			path += plen;
692 		}
693 		if (mlen) {
694 			zval_ptr_dtor(&meta);
695 			php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "rfc2397: illegal URL");
696 			return NULL;
697 		}
698 	} else {
699 		MAKE_STD_ZVAL(meta);
700 		array_init(meta);
701 	}
702 	add_assoc_bool(meta, "base64", base64);
703 
704 	/* skip ',' */
705 	comma++;
706 	dlen--;
707 
708 	if (base64) {
709 		comma = (char*)php_base64_decode((const unsigned char *)comma, dlen, &ilen);
710 		if (!comma) {
711 			zval_ptr_dtor(&meta);
712 			php_stream_wrapper_log_error(wrapper, options TSRMLS_CC, "rfc2397: unable to decode");
713 			return NULL;
714 		}
715 	} else {
716 		comma = estrndup(comma, dlen);
717 		ilen = dlen = php_url_decode(comma, dlen);
718 	}
719 
720 	if ((stream = php_stream_temp_create_rel(0, ~0u)) != NULL) {
721 		/* store data */
722 		php_stream_temp_write(stream, comma, ilen TSRMLS_CC);
723 		php_stream_temp_seek(stream, 0, SEEK_SET, &newoffs TSRMLS_CC);
724 		/* set special stream stuff (enforce exact mode) */
725 		vlen = strlen(mode);
726 		if (vlen >= sizeof(stream->mode)) {
727 			vlen = sizeof(stream->mode) - 1;
728 		}
729 		memcpy(stream->mode, mode, vlen);
730 		stream->mode[vlen] = '\0';
731 		stream->ops = &php_stream_rfc2397_ops;
732 		ts = (php_stream_temp_data*)stream->abstract;
733 		assert(ts != NULL);
734 		ts->mode = mode && mode[0] == 'r' && mode[1] != '+' ? TEMP_STREAM_READONLY : 0;
735 		ts->meta = meta;
736 	}
737 	efree(comma);
738 
739 	return stream;
740 }
741 
742 PHPAPI php_stream_wrapper_ops php_stream_rfc2397_wops = {
743 	php_stream_url_wrap_rfc2397,
744 	NULL, /* close */
745 	NULL, /* fstat */
746 	NULL, /* stat */
747 	NULL, /* opendir */
748 	"RFC2397",
749 	NULL, /* unlink */
750 	NULL, /* rename */
751 	NULL, /* mkdir */
752 	NULL  /* rmdir */
753 };
754 
755 PHPAPI php_stream_wrapper php_stream_rfc2397_wrapper =	{
756 	&php_stream_rfc2397_wops,
757 	NULL,
758 	1, /* is_url */
759 };
760 
761 /*
762  * Local variables:
763  * tab-width: 4
764  * c-basic-offset: 4
765  * End:
766  * vim600: noet sw=4 ts=4 fdm=marker
767  * vim<600: noet sw=4 ts=4
768  */
769