1 /*
2 * xmlIO.c : implementation of the I/O interfaces used by the parser
3 *
4 * See Copyright for the status of this software.
5 *
6 * daniel@veillard.com
7 *
8 * 14 Nov 2000 ht - for VMS, truncated name of long functions to under 32 char
9 */
10
11 #define IN_LIBXML
12 #include "libxml.h"
13
14 #include <string.h>
15 #include <stddef.h>
16 #ifdef HAVE_ERRNO_H
17 #include <errno.h>
18 #endif
19
20
21 #ifdef HAVE_SYS_TYPES_H
22 #include <sys/types.h>
23 #endif
24 #ifdef HAVE_SYS_STAT_H
25 #include <sys/stat.h>
26 #endif
27 #ifdef HAVE_FCNTL_H
28 #include <fcntl.h>
29 #endif
30 #ifdef HAVE_UNISTD_H
31 #include <unistd.h>
32 #endif
33 #ifdef HAVE_STDLIB_H
34 #include <stdlib.h>
35 #endif
36 #ifdef LIBXML_ZLIB_ENABLED
37 #include <zlib.h>
38 #endif
39 #ifdef LIBXML_LZMA_ENABLED
40 #include <lzma.h>
41 #endif
42
43 #if defined(_WIN32) && !defined(__CYGWIN__)
44 #define WIN32_LEAN_AND_MEAN
45 #include <windows.h>
46 #endif
47
48 #if defined(_WIN32_WCE)
49 #include <winnls.h> /* for CP_UTF8 */
50 #endif
51
52 #ifndef S_ISDIR
53 # ifdef _S_ISDIR
54 # define S_ISDIR(x) _S_ISDIR(x)
55 # elif defined(S_IFDIR)
56 # ifdef S_IFMT
57 # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
58 # elif defined(_S_IFMT)
59 # define S_ISDIR(m) (((m) & _S_IFMT) == S_IFDIR)
60 # endif
61 # endif
62 #endif
63
64 #include <libxml/xmlmemory.h>
65 #include <libxml/parser.h>
66 #include <libxml/parserInternals.h>
67 #include <libxml/xmlIO.h>
68 #include <libxml/uri.h>
69 #include <libxml/nanohttp.h>
70 #include <libxml/nanoftp.h>
71 #include <libxml/xmlerror.h>
72 #ifdef LIBXML_CATALOG_ENABLED
73 #include <libxml/catalog.h>
74 #endif
75 #include <libxml/globals.h>
76
77 #include "buf.h"
78 #include "enc.h"
79
80 /* #define VERBOSE_FAILURE */
81 /* #define DEBUG_EXTERNAL_ENTITIES */
82 /* #define DEBUG_INPUT */
83
84 #ifdef DEBUG_INPUT
85 #define MINLEN 40
86 #else
87 #define MINLEN 4000
88 #endif
89
90 /*
91 * Input I/O callback sets
92 */
93 typedef struct _xmlInputCallback {
94 xmlInputMatchCallback matchcallback;
95 xmlInputOpenCallback opencallback;
96 xmlInputReadCallback readcallback;
97 xmlInputCloseCallback closecallback;
98 } xmlInputCallback;
99
100 #define MAX_INPUT_CALLBACK 15
101
102 static xmlInputCallback xmlInputCallbackTable[MAX_INPUT_CALLBACK];
103 static int xmlInputCallbackNr = 0;
104 static int xmlInputCallbackInitialized = 0;
105
106 #ifdef LIBXML_OUTPUT_ENABLED
107 /*
108 * Output I/O callback sets
109 */
110 typedef struct _xmlOutputCallback {
111 xmlOutputMatchCallback matchcallback;
112 xmlOutputOpenCallback opencallback;
113 xmlOutputWriteCallback writecallback;
114 xmlOutputCloseCallback closecallback;
115 } xmlOutputCallback;
116
117 #define MAX_OUTPUT_CALLBACK 15
118
119 static xmlOutputCallback xmlOutputCallbackTable[MAX_OUTPUT_CALLBACK];
120 static int xmlOutputCallbackNr = 0;
121 static int xmlOutputCallbackInitialized = 0;
122
123 xmlOutputBufferPtr
124 xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder);
125 #endif /* LIBXML_OUTPUT_ENABLED */
126
127 /************************************************************************
128 * *
129 * Tree memory error handler *
130 * *
131 ************************************************************************/
132
133 static const char *IOerr[] = {
134 "Unknown IO error", /* UNKNOWN */
135 "Permission denied", /* EACCES */
136 "Resource temporarily unavailable",/* EAGAIN */
137 "Bad file descriptor", /* EBADF */
138 "Bad message", /* EBADMSG */
139 "Resource busy", /* EBUSY */
140 "Operation canceled", /* ECANCELED */
141 "No child processes", /* ECHILD */
142 "Resource deadlock avoided",/* EDEADLK */
143 "Domain error", /* EDOM */
144 "File exists", /* EEXIST */
145 "Bad address", /* EFAULT */
146 "File too large", /* EFBIG */
147 "Operation in progress", /* EINPROGRESS */
148 "Interrupted function call",/* EINTR */
149 "Invalid argument", /* EINVAL */
150 "Input/output error", /* EIO */
151 "Is a directory", /* EISDIR */
152 "Too many open files", /* EMFILE */
153 "Too many links", /* EMLINK */
154 "Inappropriate message buffer length",/* EMSGSIZE */
155 "Filename too long", /* ENAMETOOLONG */
156 "Too many open files in system",/* ENFILE */
157 "No such device", /* ENODEV */
158 "No such file or directory",/* ENOENT */
159 "Exec format error", /* ENOEXEC */
160 "No locks available", /* ENOLCK */
161 "Not enough space", /* ENOMEM */
162 "No space left on device", /* ENOSPC */
163 "Function not implemented", /* ENOSYS */
164 "Not a directory", /* ENOTDIR */
165 "Directory not empty", /* ENOTEMPTY */
166 "Not supported", /* ENOTSUP */
167 "Inappropriate I/O control operation",/* ENOTTY */
168 "No such device or address",/* ENXIO */
169 "Operation not permitted", /* EPERM */
170 "Broken pipe", /* EPIPE */
171 "Result too large", /* ERANGE */
172 "Read-only file system", /* EROFS */
173 "Invalid seek", /* ESPIPE */
174 "No such process", /* ESRCH */
175 "Operation timed out", /* ETIMEDOUT */
176 "Improper link", /* EXDEV */
177 "Attempt to load network entity %s", /* XML_IO_NETWORK_ATTEMPT */
178 "encoder error", /* XML_IO_ENCODER */
179 "flush error",
180 "write error",
181 "no input",
182 "buffer full",
183 "loading error",
184 "not a socket", /* ENOTSOCK */
185 "already connected", /* EISCONN */
186 "connection refused", /* ECONNREFUSED */
187 "unreachable network", /* ENETUNREACH */
188 "adddress in use", /* EADDRINUSE */
189 "already in use", /* EALREADY */
190 "unknown address familly", /* EAFNOSUPPORT */
191 };
192
193 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
194 /**
195 * __xmlIOWin32UTF8ToWChar:
196 * @u8String: uft-8 string
197 *
198 * Convert a string from utf-8 to wchar (WINDOWS ONLY!)
199 */
200 static wchar_t *
__xmlIOWin32UTF8ToWChar(const char * u8String)201 __xmlIOWin32UTF8ToWChar(const char *u8String)
202 {
203 wchar_t *wString = NULL;
204
205 if (u8String) {
206 int wLen =
207 MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, u8String,
208 -1, NULL, 0);
209 if (wLen) {
210 wString = xmlMalloc(wLen * sizeof(wchar_t));
211 if (wString) {
212 if (MultiByteToWideChar
213 (CP_UTF8, 0, u8String, -1, wString, wLen) == 0) {
214 xmlFree(wString);
215 wString = NULL;
216 }
217 }
218 }
219 }
220
221 return wString;
222 }
223 #endif
224
225 /**
226 * xmlIOErrMemory:
227 * @extra: extra informations
228 *
229 * Handle an out of memory condition
230 */
231 static void
xmlIOErrMemory(const char * extra)232 xmlIOErrMemory(const char *extra)
233 {
234 __xmlSimpleError(XML_FROM_IO, XML_ERR_NO_MEMORY, NULL, NULL, extra);
235 }
236
237 /**
238 * __xmlIOErr:
239 * @code: the error number
240 * @
241 * @extra: extra informations
242 *
243 * Handle an I/O error
244 */
245 void
__xmlIOErr(int domain,int code,const char * extra)246 __xmlIOErr(int domain, int code, const char *extra)
247 {
248 unsigned int idx;
249
250 if (code == 0) {
251 #ifdef HAVE_ERRNO_H
252 if (errno == 0) code = 0;
253 #ifdef EACCES
254 else if (errno == EACCES) code = XML_IO_EACCES;
255 #endif
256 #ifdef EAGAIN
257 else if (errno == EAGAIN) code = XML_IO_EAGAIN;
258 #endif
259 #ifdef EBADF
260 else if (errno == EBADF) code = XML_IO_EBADF;
261 #endif
262 #ifdef EBADMSG
263 else if (errno == EBADMSG) code = XML_IO_EBADMSG;
264 #endif
265 #ifdef EBUSY
266 else if (errno == EBUSY) code = XML_IO_EBUSY;
267 #endif
268 #ifdef ECANCELED
269 else if (errno == ECANCELED) code = XML_IO_ECANCELED;
270 #endif
271 #ifdef ECHILD
272 else if (errno == ECHILD) code = XML_IO_ECHILD;
273 #endif
274 #ifdef EDEADLK
275 else if (errno == EDEADLK) code = XML_IO_EDEADLK;
276 #endif
277 #ifdef EDOM
278 else if (errno == EDOM) code = XML_IO_EDOM;
279 #endif
280 #ifdef EEXIST
281 else if (errno == EEXIST) code = XML_IO_EEXIST;
282 #endif
283 #ifdef EFAULT
284 else if (errno == EFAULT) code = XML_IO_EFAULT;
285 #endif
286 #ifdef EFBIG
287 else if (errno == EFBIG) code = XML_IO_EFBIG;
288 #endif
289 #ifdef EINPROGRESS
290 else if (errno == EINPROGRESS) code = XML_IO_EINPROGRESS;
291 #endif
292 #ifdef EINTR
293 else if (errno == EINTR) code = XML_IO_EINTR;
294 #endif
295 #ifdef EINVAL
296 else if (errno == EINVAL) code = XML_IO_EINVAL;
297 #endif
298 #ifdef EIO
299 else if (errno == EIO) code = XML_IO_EIO;
300 #endif
301 #ifdef EISDIR
302 else if (errno == EISDIR) code = XML_IO_EISDIR;
303 #endif
304 #ifdef EMFILE
305 else if (errno == EMFILE) code = XML_IO_EMFILE;
306 #endif
307 #ifdef EMLINK
308 else if (errno == EMLINK) code = XML_IO_EMLINK;
309 #endif
310 #ifdef EMSGSIZE
311 else if (errno == EMSGSIZE) code = XML_IO_EMSGSIZE;
312 #endif
313 #ifdef ENAMETOOLONG
314 else if (errno == ENAMETOOLONG) code = XML_IO_ENAMETOOLONG;
315 #endif
316 #ifdef ENFILE
317 else if (errno == ENFILE) code = XML_IO_ENFILE;
318 #endif
319 #ifdef ENODEV
320 else if (errno == ENODEV) code = XML_IO_ENODEV;
321 #endif
322 #ifdef ENOENT
323 else if (errno == ENOENT) code = XML_IO_ENOENT;
324 #endif
325 #ifdef ENOEXEC
326 else if (errno == ENOEXEC) code = XML_IO_ENOEXEC;
327 #endif
328 #ifdef ENOLCK
329 else if (errno == ENOLCK) code = XML_IO_ENOLCK;
330 #endif
331 #ifdef ENOMEM
332 else if (errno == ENOMEM) code = XML_IO_ENOMEM;
333 #endif
334 #ifdef ENOSPC
335 else if (errno == ENOSPC) code = XML_IO_ENOSPC;
336 #endif
337 #ifdef ENOSYS
338 else if (errno == ENOSYS) code = XML_IO_ENOSYS;
339 #endif
340 #ifdef ENOTDIR
341 else if (errno == ENOTDIR) code = XML_IO_ENOTDIR;
342 #endif
343 #ifdef ENOTEMPTY
344 else if (errno == ENOTEMPTY) code = XML_IO_ENOTEMPTY;
345 #endif
346 #ifdef ENOTSUP
347 else if (errno == ENOTSUP) code = XML_IO_ENOTSUP;
348 #endif
349 #ifdef ENOTTY
350 else if (errno == ENOTTY) code = XML_IO_ENOTTY;
351 #endif
352 #ifdef ENXIO
353 else if (errno == ENXIO) code = XML_IO_ENXIO;
354 #endif
355 #ifdef EPERM
356 else if (errno == EPERM) code = XML_IO_EPERM;
357 #endif
358 #ifdef EPIPE
359 else if (errno == EPIPE) code = XML_IO_EPIPE;
360 #endif
361 #ifdef ERANGE
362 else if (errno == ERANGE) code = XML_IO_ERANGE;
363 #endif
364 #ifdef EROFS
365 else if (errno == EROFS) code = XML_IO_EROFS;
366 #endif
367 #ifdef ESPIPE
368 else if (errno == ESPIPE) code = XML_IO_ESPIPE;
369 #endif
370 #ifdef ESRCH
371 else if (errno == ESRCH) code = XML_IO_ESRCH;
372 #endif
373 #ifdef ETIMEDOUT
374 else if (errno == ETIMEDOUT) code = XML_IO_ETIMEDOUT;
375 #endif
376 #ifdef EXDEV
377 else if (errno == EXDEV) code = XML_IO_EXDEV;
378 #endif
379 #ifdef ENOTSOCK
380 else if (errno == ENOTSOCK) code = XML_IO_ENOTSOCK;
381 #endif
382 #ifdef EISCONN
383 else if (errno == EISCONN) code = XML_IO_EISCONN;
384 #endif
385 #ifdef ECONNREFUSED
386 else if (errno == ECONNREFUSED) code = XML_IO_ECONNREFUSED;
387 #endif
388 #ifdef ETIMEDOUT
389 else if (errno == ETIMEDOUT) code = XML_IO_ETIMEDOUT;
390 #endif
391 #ifdef ENETUNREACH
392 else if (errno == ENETUNREACH) code = XML_IO_ENETUNREACH;
393 #endif
394 #ifdef EADDRINUSE
395 else if (errno == EADDRINUSE) code = XML_IO_EADDRINUSE;
396 #endif
397 #ifdef EINPROGRESS
398 else if (errno == EINPROGRESS) code = XML_IO_EINPROGRESS;
399 #endif
400 #ifdef EALREADY
401 else if (errno == EALREADY) code = XML_IO_EALREADY;
402 #endif
403 #ifdef EAFNOSUPPORT
404 else if (errno == EAFNOSUPPORT) code = XML_IO_EAFNOSUPPORT;
405 #endif
406 else code = XML_IO_UNKNOWN;
407 #endif /* HAVE_ERRNO_H */
408 }
409 idx = 0;
410 if (code >= XML_IO_UNKNOWN) idx = code - XML_IO_UNKNOWN;
411 if (idx >= (sizeof(IOerr) / sizeof(IOerr[0]))) idx = 0;
412
413 __xmlSimpleError(domain, code, NULL, IOerr[idx], extra);
414 }
415
416 /**
417 * xmlIOErr:
418 * @code: the error number
419 * @extra: extra informations
420 *
421 * Handle an I/O error
422 */
423 static void
xmlIOErr(int code,const char * extra)424 xmlIOErr(int code, const char *extra)
425 {
426 __xmlIOErr(XML_FROM_IO, code, extra);
427 }
428
429 /**
430 * __xmlLoaderErr:
431 * @ctx: the parser context
432 * @extra: extra informations
433 *
434 * Handle a resource access error
435 */
436 void
__xmlLoaderErr(void * ctx,const char * msg,const char * filename)437 __xmlLoaderErr(void *ctx, const char *msg, const char *filename)
438 {
439 xmlParserCtxtPtr ctxt = (xmlParserCtxtPtr) ctx;
440 xmlStructuredErrorFunc schannel = NULL;
441 xmlGenericErrorFunc channel = NULL;
442 void *data = NULL;
443 xmlErrorLevel level = XML_ERR_ERROR;
444
445 if ((ctxt != NULL) && (ctxt->disableSAX != 0) &&
446 (ctxt->instate == XML_PARSER_EOF))
447 return;
448 if ((ctxt != NULL) && (ctxt->sax != NULL)) {
449 if (ctxt->validate) {
450 channel = ctxt->sax->error;
451 level = XML_ERR_ERROR;
452 } else {
453 channel = ctxt->sax->warning;
454 level = XML_ERR_WARNING;
455 }
456 if (ctxt->sax->initialized == XML_SAX2_MAGIC)
457 schannel = ctxt->sax->serror;
458 data = ctxt->userData;
459 }
460 __xmlRaiseError(schannel, channel, data, ctxt, NULL, XML_FROM_IO,
461 XML_IO_LOAD_ERROR, level, NULL, 0,
462 filename, NULL, NULL, 0, 0,
463 msg, filename);
464
465 }
466
467 /************************************************************************
468 * *
469 * Tree memory error handler *
470 * *
471 ************************************************************************/
472 /**
473 * xmlNormalizeWindowsPath:
474 * @path: the input file path
475 *
476 * This function is obsolete. Please see xmlURIFromPath in uri.c for
477 * a better solution.
478 *
479 * Returns a canonicalized version of the path
480 */
481 xmlChar *
xmlNormalizeWindowsPath(const xmlChar * path)482 xmlNormalizeWindowsPath(const xmlChar *path)
483 {
484 return xmlCanonicPath(path);
485 }
486
487 /**
488 * xmlCleanupInputCallbacks:
489 *
490 * clears the entire input callback table. this includes the
491 * compiled-in I/O.
492 */
493 void
xmlCleanupInputCallbacks(void)494 xmlCleanupInputCallbacks(void)
495 {
496 int i;
497
498 if (!xmlInputCallbackInitialized)
499 return;
500
501 for (i = xmlInputCallbackNr - 1; i >= 0; i--) {
502 xmlInputCallbackTable[i].matchcallback = NULL;
503 xmlInputCallbackTable[i].opencallback = NULL;
504 xmlInputCallbackTable[i].readcallback = NULL;
505 xmlInputCallbackTable[i].closecallback = NULL;
506 }
507
508 xmlInputCallbackNr = 0;
509 xmlInputCallbackInitialized = 0;
510 }
511
512 /**
513 * xmlPopInputCallbacks:
514 *
515 * Clear the top input callback from the input stack. this includes the
516 * compiled-in I/O.
517 *
518 * Returns the number of input callback registered or -1 in case of error.
519 */
520 int
xmlPopInputCallbacks(void)521 xmlPopInputCallbacks(void)
522 {
523 if (!xmlInputCallbackInitialized)
524 return(-1);
525
526 if (xmlInputCallbackNr <= 0)
527 return(-1);
528
529 xmlInputCallbackNr--;
530 xmlInputCallbackTable[xmlInputCallbackNr].matchcallback = NULL;
531 xmlInputCallbackTable[xmlInputCallbackNr].opencallback = NULL;
532 xmlInputCallbackTable[xmlInputCallbackNr].readcallback = NULL;
533 xmlInputCallbackTable[xmlInputCallbackNr].closecallback = NULL;
534
535 return(xmlInputCallbackNr);
536 }
537
538 #ifdef LIBXML_OUTPUT_ENABLED
539 /**
540 * xmlCleanupOutputCallbacks:
541 *
542 * clears the entire output callback table. this includes the
543 * compiled-in I/O callbacks.
544 */
545 void
xmlCleanupOutputCallbacks(void)546 xmlCleanupOutputCallbacks(void)
547 {
548 int i;
549
550 if (!xmlOutputCallbackInitialized)
551 return;
552
553 for (i = xmlOutputCallbackNr - 1; i >= 0; i--) {
554 xmlOutputCallbackTable[i].matchcallback = NULL;
555 xmlOutputCallbackTable[i].opencallback = NULL;
556 xmlOutputCallbackTable[i].writecallback = NULL;
557 xmlOutputCallbackTable[i].closecallback = NULL;
558 }
559
560 xmlOutputCallbackNr = 0;
561 xmlOutputCallbackInitialized = 0;
562 }
563 #endif /* LIBXML_OUTPUT_ENABLED */
564
565 /************************************************************************
566 * *
567 * Standard I/O for file accesses *
568 * *
569 ************************************************************************/
570
571 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
572
573 /**
574 * xmlWrapOpenUtf8:
575 * @path: the path in utf-8 encoding
576 * @mode: type of access (0 - read, 1 - write)
577 *
578 * function opens the file specified by @path
579 *
580 */
581 static FILE*
xmlWrapOpenUtf8(const char * path,int mode)582 xmlWrapOpenUtf8(const char *path,int mode)
583 {
584 FILE *fd = NULL;
585 wchar_t *wPath;
586
587 wPath = __xmlIOWin32UTF8ToWChar(path);
588 if(wPath)
589 {
590 fd = _wfopen(wPath, mode ? L"wb" : L"rb");
591 xmlFree(wPath);
592 }
593 /* maybe path in native encoding */
594 if(fd == NULL)
595 fd = fopen(path, mode ? "wb" : "rb");
596
597 return fd;
598 }
599
600 #ifdef LIBXML_ZLIB_ENABLED
601 static gzFile
xmlWrapGzOpenUtf8(const char * path,const char * mode)602 xmlWrapGzOpenUtf8(const char *path, const char *mode)
603 {
604 gzFile fd;
605 wchar_t *wPath;
606
607 fd = gzopen (path, mode);
608 if (fd)
609 return fd;
610
611 wPath = __xmlIOWin32UTF8ToWChar(path);
612 if(wPath)
613 {
614 int d, m = (strstr(mode, "r") ? O_RDONLY : O_RDWR);
615 #ifdef _O_BINARY
616 m |= (strstr(mode, "b") ? _O_BINARY : 0);
617 #endif
618 d = _wopen(wPath, m);
619 if (d >= 0)
620 fd = gzdopen(d, mode);
621 xmlFree(wPath);
622 }
623
624 return fd;
625 }
626 #endif
627
628 /**
629 * xmlWrapStatUtf8:
630 * @path: the path in utf-8 encoding
631 * @info: structure that stores results
632 *
633 * function obtains information about the file or directory
634 *
635 */
636 static int
xmlWrapStatUtf8(const char * path,struct _stat * info)637 xmlWrapStatUtf8(const char *path, struct _stat *info) {
638 int retval = -1;
639 wchar_t *wPath;
640
641 wPath = __xmlIOWin32UTF8ToWChar(path);
642 if (wPath) {
643 retval = _wstat(wPath, info);
644 xmlFree(wPath);
645 }
646 /* maybe path in native encoding */
647 if(retval < 0)
648 retval = _stat(path, info);
649 return retval;
650 }
651
652 #endif
653
654 /**
655 * xmlCheckFilename:
656 * @path: the path to check
657 *
658 * function checks to see if @path is a valid source
659 * (file, socket...) for XML.
660 *
661 * if stat is not available on the target machine,
662 * returns 1. if stat fails, returns 0 (if calling
663 * stat on the filename fails, it can't be right).
664 * if stat succeeds and the file is a directory,
665 * returns 2. otherwise returns 1.
666 */
667
668 int
xmlCheckFilename(const char * path)669 xmlCheckFilename (const char *path)
670 {
671 #ifdef HAVE_STAT
672 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
673 struct _stat stat_buffer;
674 #else
675 struct stat stat_buffer;
676 #endif
677 #endif
678 if (path == NULL)
679 return(0);
680
681 #ifdef HAVE_STAT
682 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
683 /*
684 * On Windows stat and wstat do not work with long pathname,
685 * which start with '\\?\'
686 */
687 if ((path[0] == '\\') && (path[1] == '\\') && (path[2] == '?') &&
688 (path[3] == '\\') )
689 return 1;
690
691 if (xmlWrapStatUtf8(path, &stat_buffer) == -1)
692 return 0;
693 #else
694 if (stat(path, &stat_buffer) == -1)
695 return 0;
696 #endif
697 #ifdef S_ISDIR
698 if (S_ISDIR(stat_buffer.st_mode))
699 return 2;
700 #endif
701 #endif /* HAVE_STAT */
702 return 1;
703 }
704
705 /**
706 * xmlInputReadCallbackNop:
707 *
708 * No Operation xmlInputReadCallback function, does nothing.
709 *
710 * Returns zero
711 */
712 int
xmlInputReadCallbackNop(void * context ATTRIBUTE_UNUSED,char * buffer ATTRIBUTE_UNUSED,int len ATTRIBUTE_UNUSED)713 xmlInputReadCallbackNop(void *context ATTRIBUTE_UNUSED,
714 char *buffer ATTRIBUTE_UNUSED,
715 int len ATTRIBUTE_UNUSED) {
716 return(0);
717 }
718
719 /**
720 * xmlFdRead:
721 * @context: the I/O context
722 * @buffer: where to drop data
723 * @len: number of bytes to read
724 *
725 * Read @len bytes to @buffer from the I/O channel.
726 *
727 * Returns the number of bytes written
728 */
729 static int
xmlFdRead(void * context,char * buffer,int len)730 xmlFdRead (void * context, char * buffer, int len) {
731 int ret;
732
733 ret = read((int) (ptrdiff_t) context, &buffer[0], len);
734 if (ret < 0) xmlIOErr(0, "read()");
735 return(ret);
736 }
737
738 #ifdef LIBXML_OUTPUT_ENABLED
739 /**
740 * xmlFdWrite:
741 * @context: the I/O context
742 * @buffer: where to get data
743 * @len: number of bytes to write
744 *
745 * Write @len bytes from @buffer to the I/O channel.
746 *
747 * Returns the number of bytes written
748 */
749 static int
xmlFdWrite(void * context,const char * buffer,int len)750 xmlFdWrite (void * context, const char * buffer, int len) {
751 int ret = 0;
752
753 if (len > 0) {
754 ret = write((int) (ptrdiff_t) context, &buffer[0], len);
755 if (ret < 0) xmlIOErr(0, "write()");
756 }
757 return(ret);
758 }
759 #endif /* LIBXML_OUTPUT_ENABLED */
760
761 /**
762 * xmlFdClose:
763 * @context: the I/O context
764 *
765 * Close an I/O channel
766 *
767 * Returns 0 in case of success and error code otherwise
768 */
769 static int
xmlFdClose(void * context)770 xmlFdClose (void * context) {
771 int ret;
772 ret = close((int) (ptrdiff_t) context);
773 if (ret < 0) xmlIOErr(0, "close()");
774 return(ret);
775 }
776
777 /**
778 * xmlFileMatch:
779 * @filename: the URI for matching
780 *
781 * input from FILE *
782 *
783 * Returns 1 if matches, 0 otherwise
784 */
785 int
xmlFileMatch(const char * filename ATTRIBUTE_UNUSED)786 xmlFileMatch (const char *filename ATTRIBUTE_UNUSED) {
787 return(1);
788 }
789
790 /**
791 * xmlFileOpen_real:
792 * @filename: the URI for matching
793 *
794 * input from FILE *, supports compressed input
795 * if @filename is " " then the standard input is used
796 *
797 * Returns an I/O context or NULL in case of error
798 */
799 static void *
xmlFileOpen_real(const char * filename)800 xmlFileOpen_real (const char *filename) {
801 const char *path = filename;
802 FILE *fd;
803
804 if (filename == NULL)
805 return(NULL);
806
807 if (!strcmp(filename, "-")) {
808 fd = stdin;
809 return((void *) fd);
810 }
811
812 if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) {
813 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
814 path = &filename[17];
815 #else
816 path = &filename[16];
817 #endif
818 } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
819 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
820 path = &filename[8];
821 #else
822 path = &filename[7];
823 #endif
824 } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:/", 6)) {
825 /* lots of generators seems to lazy to read RFC 1738 */
826 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
827 path = &filename[6];
828 #else
829 path = &filename[5];
830 #endif
831 }
832
833 /* Do not check DDNAME on zOS ! */
834 #if !defined(__MVS__)
835 if (!xmlCheckFilename(path))
836 return(NULL);
837 #endif
838
839 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
840 fd = xmlWrapOpenUtf8(path, 0);
841 #else
842 fd = fopen(path, "r");
843 #endif /* WIN32 */
844 if (fd == NULL) xmlIOErr(0, path);
845 return((void *) fd);
846 }
847
848 /**
849 * xmlFileOpen:
850 * @filename: the URI for matching
851 *
852 * Wrapper around xmlFileOpen_real that try it with an unescaped
853 * version of @filename, if this fails fallback to @filename
854 *
855 * Returns a handler or NULL in case or failure
856 */
857 void *
xmlFileOpen(const char * filename)858 xmlFileOpen (const char *filename) {
859 char *unescaped;
860 void *retval;
861
862 retval = xmlFileOpen_real(filename);
863 if (retval == NULL) {
864 unescaped = xmlURIUnescapeString(filename, 0, NULL);
865 if (unescaped != NULL) {
866 retval = xmlFileOpen_real(unescaped);
867 xmlFree(unescaped);
868 }
869 }
870
871 return retval;
872 }
873
874 #ifdef LIBXML_OUTPUT_ENABLED
875 /**
876 * xmlFileOpenW:
877 * @filename: the URI for matching
878 *
879 * output to from FILE *,
880 * if @filename is "-" then the standard output is used
881 *
882 * Returns an I/O context or NULL in case of error
883 */
884 static void *
xmlFileOpenW(const char * filename)885 xmlFileOpenW (const char *filename) {
886 const char *path = NULL;
887 FILE *fd;
888
889 if (!strcmp(filename, "-")) {
890 fd = stdout;
891 return((void *) fd);
892 }
893
894 if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17))
895 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
896 path = &filename[17];
897 #else
898 path = &filename[16];
899 #endif
900 else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
901 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
902 path = &filename[8];
903 #else
904 path = &filename[7];
905 #endif
906 } else
907 path = filename;
908
909 if (path == NULL)
910 return(NULL);
911
912 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
913 fd = xmlWrapOpenUtf8(path, 1);
914 #elif(__MVS__)
915 fd = fopen(path, "w");
916 #else
917 fd = fopen(path, "wb");
918 #endif /* WIN32 */
919
920 if (fd == NULL) xmlIOErr(0, path);
921 return((void *) fd);
922 }
923 #endif /* LIBXML_OUTPUT_ENABLED */
924
925 /**
926 * xmlFileRead:
927 * @context: the I/O context
928 * @buffer: where to drop data
929 * @len: number of bytes to write
930 *
931 * Read @len bytes to @buffer from the I/O channel.
932 *
933 * Returns the number of bytes written or < 0 in case of failure
934 */
935 int
xmlFileRead(void * context,char * buffer,int len)936 xmlFileRead (void * context, char * buffer, int len) {
937 int ret;
938 if ((context == NULL) || (buffer == NULL))
939 return(-1);
940 ret = fread(&buffer[0], 1, len, (FILE *) context);
941 if (ret < 0) xmlIOErr(0, "fread()");
942 return(ret);
943 }
944
945 #ifdef LIBXML_OUTPUT_ENABLED
946 /**
947 * xmlFileWrite:
948 * @context: the I/O context
949 * @buffer: where to drop data
950 * @len: number of bytes to write
951 *
952 * Write @len bytes from @buffer to the I/O channel.
953 *
954 * Returns the number of bytes written
955 */
956 static int
xmlFileWrite(void * context,const char * buffer,int len)957 xmlFileWrite (void * context, const char * buffer, int len) {
958 int items;
959
960 if ((context == NULL) || (buffer == NULL))
961 return(-1);
962 items = fwrite(&buffer[0], len, 1, (FILE *) context);
963 if ((items == 0) && (ferror((FILE *) context))) {
964 xmlIOErr(0, "fwrite()");
965 return(-1);
966 }
967 return(items * len);
968 }
969 #endif /* LIBXML_OUTPUT_ENABLED */
970
971 /**
972 * xmlFileClose:
973 * @context: the I/O context
974 *
975 * Close an I/O channel
976 *
977 * Returns 0 or -1 in case of error
978 */
979 int
xmlFileClose(void * context)980 xmlFileClose (void * context) {
981 FILE *fil;
982 int ret;
983
984 if (context == NULL)
985 return(-1);
986 fil = (FILE *) context;
987 if ((fil == stdout) || (fil == stderr)) {
988 ret = fflush(fil);
989 if (ret < 0)
990 xmlIOErr(0, "fflush()");
991 return(0);
992 }
993 if (fil == stdin)
994 return(0);
995 ret = ( fclose((FILE *) context) == EOF ) ? -1 : 0;
996 if (ret < 0)
997 xmlIOErr(0, "fclose()");
998 return(ret);
999 }
1000
1001 /**
1002 * xmlFileFlush:
1003 * @context: the I/O context
1004 *
1005 * Flush an I/O channel
1006 */
1007 static int
xmlFileFlush(void * context)1008 xmlFileFlush (void * context) {
1009 int ret;
1010
1011 if (context == NULL)
1012 return(-1);
1013 ret = ( fflush((FILE *) context) == EOF ) ? -1 : 0;
1014 if (ret < 0)
1015 xmlIOErr(0, "fflush()");
1016 return(ret);
1017 }
1018
1019 #ifdef LIBXML_OUTPUT_ENABLED
1020 /**
1021 * xmlBufferWrite:
1022 * @context: the xmlBuffer
1023 * @buffer: the data to write
1024 * @len: number of bytes to write
1025 *
1026 * Write @len bytes from @buffer to the xml buffer
1027 *
1028 * Returns the number of bytes written
1029 */
1030 static int
xmlBufferWrite(void * context,const char * buffer,int len)1031 xmlBufferWrite (void * context, const char * buffer, int len) {
1032 int ret;
1033
1034 ret = xmlBufferAdd((xmlBufferPtr) context, (const xmlChar *) buffer, len);
1035 if (ret != 0)
1036 return(-1);
1037 return(len);
1038 }
1039 #endif
1040
1041 #ifdef LIBXML_ZLIB_ENABLED
1042 /************************************************************************
1043 * *
1044 * I/O for compressed file accesses *
1045 * *
1046 ************************************************************************/
1047 /**
1048 * xmlGzfileMatch:
1049 * @filename: the URI for matching
1050 *
1051 * input from compressed file test
1052 *
1053 * Returns 1 if matches, 0 otherwise
1054 */
1055 static int
xmlGzfileMatch(const char * filename ATTRIBUTE_UNUSED)1056 xmlGzfileMatch (const char *filename ATTRIBUTE_UNUSED) {
1057 return(1);
1058 }
1059
1060 /**
1061 * xmlGzfileOpen_real:
1062 * @filename: the URI for matching
1063 *
1064 * input from compressed file open
1065 * if @filename is " " then the standard input is used
1066 *
1067 * Returns an I/O context or NULL in case of error
1068 */
1069 static void *
xmlGzfileOpen_real(const char * filename)1070 xmlGzfileOpen_real (const char *filename) {
1071 const char *path = NULL;
1072 gzFile fd;
1073
1074 if (!strcmp(filename, "-")) {
1075 int duped_fd = dup(fileno(stdin));
1076 fd = gzdopen(duped_fd, "rb");
1077 if (fd == Z_NULL && duped_fd >= 0) {
1078 close(duped_fd); /* gzdOpen() does not close on failure */
1079 }
1080
1081 return((void *) fd);
1082 }
1083
1084 if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17))
1085 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
1086 path = &filename[17];
1087 #else
1088 path = &filename[16];
1089 #endif
1090 else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
1091 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
1092 path = &filename[8];
1093 #else
1094 path = &filename[7];
1095 #endif
1096 } else
1097 path = filename;
1098
1099 if (path == NULL)
1100 return(NULL);
1101 if (!xmlCheckFilename(path))
1102 return(NULL);
1103
1104 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
1105 fd = xmlWrapGzOpenUtf8(path, "rb");
1106 #else
1107 fd = gzopen(path, "rb");
1108 #endif
1109 return((void *) fd);
1110 }
1111
1112 /**
1113 * xmlGzfileOpen:
1114 * @filename: the URI for matching
1115 *
1116 * Wrapper around xmlGzfileOpen if the open fais, it will
1117 * try to unescape @filename
1118 */
1119 static void *
xmlGzfileOpen(const char * filename)1120 xmlGzfileOpen (const char *filename) {
1121 char *unescaped;
1122 void *retval;
1123
1124 retval = xmlGzfileOpen_real(filename);
1125 if (retval == NULL) {
1126 unescaped = xmlURIUnescapeString(filename, 0, NULL);
1127 if (unescaped != NULL) {
1128 retval = xmlGzfileOpen_real(unescaped);
1129 }
1130 xmlFree(unescaped);
1131 }
1132 return retval;
1133 }
1134
1135 #ifdef LIBXML_OUTPUT_ENABLED
1136 /**
1137 * xmlGzfileOpenW:
1138 * @filename: the URI for matching
1139 * @compression: the compression factor (0 - 9 included)
1140 *
1141 * input from compressed file open
1142 * if @filename is " " then the standard input is used
1143 *
1144 * Returns an I/O context or NULL in case of error
1145 */
1146 static void *
xmlGzfileOpenW(const char * filename,int compression)1147 xmlGzfileOpenW (const char *filename, int compression) {
1148 const char *path = NULL;
1149 char mode[15];
1150 gzFile fd;
1151
1152 snprintf(mode, sizeof(mode), "wb%d", compression);
1153 if (!strcmp(filename, "-")) {
1154 int duped_fd = dup(fileno(stdout));
1155 fd = gzdopen(duped_fd, "rb");
1156 if (fd == Z_NULL && duped_fd >= 0) {
1157 close(duped_fd); /* gzdOpen() does not close on failure */
1158 }
1159
1160 return((void *) fd);
1161 }
1162
1163 if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17))
1164 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
1165 path = &filename[17];
1166 #else
1167 path = &filename[16];
1168 #endif
1169 else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
1170 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
1171 path = &filename[8];
1172 #else
1173 path = &filename[7];
1174 #endif
1175 } else
1176 path = filename;
1177
1178 if (path == NULL)
1179 return(NULL);
1180
1181 #if defined(_WIN32) || defined (__DJGPP__) && !defined (__CYGWIN__)
1182 fd = xmlWrapGzOpenUtf8(path, mode);
1183 #else
1184 fd = gzopen(path, mode);
1185 #endif
1186 return((void *) fd);
1187 }
1188 #endif /* LIBXML_OUTPUT_ENABLED */
1189
1190 /**
1191 * xmlGzfileRead:
1192 * @context: the I/O context
1193 * @buffer: where to drop data
1194 * @len: number of bytes to write
1195 *
1196 * Read @len bytes to @buffer from the compressed I/O channel.
1197 *
1198 * Returns the number of bytes read.
1199 */
1200 static int
xmlGzfileRead(void * context,char * buffer,int len)1201 xmlGzfileRead (void * context, char * buffer, int len) {
1202 int ret;
1203
1204 ret = gzread((gzFile) context, &buffer[0], len);
1205 if (ret < 0) xmlIOErr(0, "gzread()");
1206 return(ret);
1207 }
1208
1209 #ifdef LIBXML_OUTPUT_ENABLED
1210 /**
1211 * xmlGzfileWrite:
1212 * @context: the I/O context
1213 * @buffer: where to drop data
1214 * @len: number of bytes to write
1215 *
1216 * Write @len bytes from @buffer to the compressed I/O channel.
1217 *
1218 * Returns the number of bytes written
1219 */
1220 static int
xmlGzfileWrite(void * context,const char * buffer,int len)1221 xmlGzfileWrite (void * context, const char * buffer, int len) {
1222 int ret;
1223
1224 ret = gzwrite((gzFile) context, (char *) &buffer[0], len);
1225 if (ret < 0) xmlIOErr(0, "gzwrite()");
1226 return(ret);
1227 }
1228 #endif /* LIBXML_OUTPUT_ENABLED */
1229
1230 /**
1231 * xmlGzfileClose:
1232 * @context: the I/O context
1233 *
1234 * Close a compressed I/O channel
1235 */
1236 static int
xmlGzfileClose(void * context)1237 xmlGzfileClose (void * context) {
1238 int ret;
1239
1240 ret = (gzclose((gzFile) context) == Z_OK ) ? 0 : -1;
1241 if (ret < 0) xmlIOErr(0, "gzclose()");
1242 return(ret);
1243 }
1244 #endif /* LIBXML_ZLIB_ENABLED */
1245
1246 #ifdef LIBXML_LZMA_ENABLED
1247 /************************************************************************
1248 * *
1249 * I/O for compressed file accesses *
1250 * *
1251 ************************************************************************/
1252 #include "xzlib.h"
1253 /**
1254 * xmlXzfileMatch:
1255 * @filename: the URI for matching
1256 *
1257 * input from compressed file test
1258 *
1259 * Returns 1 if matches, 0 otherwise
1260 */
1261 static int
xmlXzfileMatch(const char * filename ATTRIBUTE_UNUSED)1262 xmlXzfileMatch (const char *filename ATTRIBUTE_UNUSED) {
1263 return(1);
1264 }
1265
1266 /**
1267 * xmlXzFileOpen_real:
1268 * @filename: the URI for matching
1269 *
1270 * input from compressed file open
1271 * if @filename is " " then the standard input is used
1272 *
1273 * Returns an I/O context or NULL in case of error
1274 */
1275 static void *
xmlXzfileOpen_real(const char * filename)1276 xmlXzfileOpen_real (const char *filename) {
1277 const char *path = NULL;
1278 xzFile fd;
1279
1280 if (!strcmp(filename, "-")) {
1281 fd = __libxml2_xzdopen(dup(fileno(stdin)), "rb");
1282 return((void *) fd);
1283 }
1284
1285 if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file://localhost/", 17)) {
1286 path = &filename[16];
1287 } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:///", 8)) {
1288 path = &filename[7];
1289 } else if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "file:/", 6)) {
1290 /* lots of generators seems to lazy to read RFC 1738 */
1291 path = &filename[5];
1292 } else
1293 path = filename;
1294
1295 if (path == NULL)
1296 return(NULL);
1297 if (!xmlCheckFilename(path))
1298 return(NULL);
1299
1300 fd = __libxml2_xzopen(path, "rb");
1301 return((void *) fd);
1302 }
1303
1304 /**
1305 * xmlXzfileOpen:
1306 * @filename: the URI for matching
1307 *
1308 * Wrapper around xmlXzfileOpen_real that try it with an unescaped
1309 * version of @filename, if this fails fallback to @filename
1310 *
1311 * Returns a handler or NULL in case or failure
1312 */
1313 static void *
xmlXzfileOpen(const char * filename)1314 xmlXzfileOpen (const char *filename) {
1315 char *unescaped;
1316 void *retval;
1317
1318 retval = xmlXzfileOpen_real(filename);
1319 if (retval == NULL) {
1320 unescaped = xmlURIUnescapeString(filename, 0, NULL);
1321 if (unescaped != NULL) {
1322 retval = xmlXzfileOpen_real(unescaped);
1323 }
1324 xmlFree(unescaped);
1325 }
1326
1327 return retval;
1328 }
1329
1330 /**
1331 * xmlXzfileRead:
1332 * @context: the I/O context
1333 * @buffer: where to drop data
1334 * @len: number of bytes to write
1335 *
1336 * Read @len bytes to @buffer from the compressed I/O channel.
1337 *
1338 * Returns the number of bytes written
1339 */
1340 static int
xmlXzfileRead(void * context,char * buffer,int len)1341 xmlXzfileRead (void * context, char * buffer, int len) {
1342 int ret;
1343
1344 ret = __libxml2_xzread((xzFile) context, &buffer[0], len);
1345 if (ret < 0) xmlIOErr(0, "xzread()");
1346 return(ret);
1347 }
1348
1349 /**
1350 * xmlXzfileClose:
1351 * @context: the I/O context
1352 *
1353 * Close a compressed I/O channel
1354 */
1355 static int
xmlXzfileClose(void * context)1356 xmlXzfileClose (void * context) {
1357 int ret;
1358
1359 ret = (__libxml2_xzclose((xzFile) context) == LZMA_OK ) ? 0 : -1;
1360 if (ret < 0) xmlIOErr(0, "xzclose()");
1361 return(ret);
1362 }
1363 #endif /* LIBXML_LZMA_ENABLED */
1364
1365 #ifdef LIBXML_HTTP_ENABLED
1366 /************************************************************************
1367 * *
1368 * I/O for HTTP file accesses *
1369 * *
1370 ************************************************************************/
1371
1372 #ifdef LIBXML_OUTPUT_ENABLED
1373 typedef struct xmlIOHTTPWriteCtxt_
1374 {
1375 int compression;
1376
1377 char * uri;
1378
1379 void * doc_buff;
1380
1381 } xmlIOHTTPWriteCtxt, *xmlIOHTTPWriteCtxtPtr;
1382
1383 #ifdef LIBXML_ZLIB_ENABLED
1384
1385 #define DFLT_WBITS ( -15 )
1386 #define DFLT_MEM_LVL ( 8 )
1387 #define GZ_MAGIC1 ( 0x1f )
1388 #define GZ_MAGIC2 ( 0x8b )
1389 #define LXML_ZLIB_OS_CODE ( 0x03 )
1390 #define INIT_HTTP_BUFF_SIZE ( 32768 )
1391 #define DFLT_ZLIB_RATIO ( 5 )
1392
1393 /*
1394 ** Data structure and functions to work with sending compressed data
1395 ** via HTTP.
1396 */
1397
1398 typedef struct xmlZMemBuff_
1399 {
1400 unsigned long size;
1401 unsigned long crc;
1402
1403 unsigned char * zbuff;
1404 z_stream zctrl;
1405
1406 } xmlZMemBuff, *xmlZMemBuffPtr;
1407
1408 /**
1409 * append_reverse_ulong
1410 * @buff: Compressed memory buffer
1411 * @data: Unsigned long to append
1412 *
1413 * Append a unsigned long in reverse byte order to the end of the
1414 * memory buffer.
1415 */
1416 static void
append_reverse_ulong(xmlZMemBuff * buff,unsigned long data)1417 append_reverse_ulong( xmlZMemBuff * buff, unsigned long data ) {
1418
1419 int idx;
1420
1421 if ( buff == NULL )
1422 return;
1423
1424 /*
1425 ** This is plagiarized from putLong in gzio.c (zlib source) where
1426 ** the number "4" is hardcoded. If zlib is ever patched to
1427 ** support 64 bit file sizes, this code would need to be patched
1428 ** as well.
1429 */
1430
1431 for ( idx = 0; idx < 4; idx++ ) {
1432 *buff->zctrl.next_out = ( data & 0xff );
1433 data >>= 8;
1434 buff->zctrl.next_out++;
1435 }
1436
1437 return;
1438 }
1439
1440 /**
1441 *
1442 * xmlFreeZMemBuff
1443 * @buff: The memory buffer context to clear
1444 *
1445 * Release all the resources associated with the compressed memory buffer.
1446 */
1447 static void
xmlFreeZMemBuff(xmlZMemBuffPtr buff)1448 xmlFreeZMemBuff( xmlZMemBuffPtr buff ) {
1449
1450 #ifdef DEBUG_HTTP
1451 int z_err;
1452 #endif
1453
1454 if ( buff == NULL )
1455 return;
1456
1457 xmlFree( buff->zbuff );
1458 #ifdef DEBUG_HTTP
1459 z_err = deflateEnd( &buff->zctrl );
1460 if ( z_err != Z_OK )
1461 xmlGenericError( xmlGenericErrorContext,
1462 "xmlFreeZMemBuff: Error releasing zlib context: %d\n",
1463 z_err );
1464 #else
1465 deflateEnd( &buff->zctrl );
1466 #endif
1467
1468 xmlFree( buff );
1469 return;
1470 }
1471
1472 /**
1473 * xmlCreateZMemBuff
1474 *@compression: Compression value to use
1475 *
1476 * Create a memory buffer to hold the compressed XML document. The
1477 * compressed document in memory will end up being identical to what
1478 * would be created if gzopen/gzwrite/gzclose were being used to
1479 * write the document to disk. The code for the header/trailer data to
1480 * the compression is plagiarized from the zlib source files.
1481 */
1482 static void *
xmlCreateZMemBuff(int compression)1483 xmlCreateZMemBuff( int compression ) {
1484
1485 int z_err;
1486 int hdr_lgth;
1487 xmlZMemBuffPtr buff = NULL;
1488
1489 if ( ( compression < 1 ) || ( compression > 9 ) )
1490 return ( NULL );
1491
1492 /* Create the control and data areas */
1493
1494 buff = xmlMalloc( sizeof( xmlZMemBuff ) );
1495 if ( buff == NULL ) {
1496 xmlIOErrMemory("creating buffer context");
1497 return ( NULL );
1498 }
1499
1500 (void)memset( buff, 0, sizeof( xmlZMemBuff ) );
1501 buff->size = INIT_HTTP_BUFF_SIZE;
1502 buff->zbuff = xmlMalloc( buff->size );
1503 if ( buff->zbuff == NULL ) {
1504 xmlFreeZMemBuff( buff );
1505 xmlIOErrMemory("creating buffer");
1506 return ( NULL );
1507 }
1508
1509 z_err = deflateInit2( &buff->zctrl, compression, Z_DEFLATED,
1510 DFLT_WBITS, DFLT_MEM_LVL, Z_DEFAULT_STRATEGY );
1511 if ( z_err != Z_OK ) {
1512 xmlChar msg[500];
1513 xmlFreeZMemBuff( buff );
1514 buff = NULL;
1515 xmlStrPrintf(msg, 500,
1516 "xmlCreateZMemBuff: %s %d\n",
1517 "Error initializing compression context. ZLIB error:",
1518 z_err );
1519 xmlIOErr(XML_IO_WRITE, (const char *) msg);
1520 return ( NULL );
1521 }
1522
1523 /* Set the header data. The CRC will be needed for the trailer */
1524 buff->crc = crc32( 0L, NULL, 0 );
1525 hdr_lgth = snprintf( (char *)buff->zbuff, buff->size,
1526 "%c%c%c%c%c%c%c%c%c%c",
1527 GZ_MAGIC1, GZ_MAGIC2, Z_DEFLATED,
1528 0, 0, 0, 0, 0, 0, LXML_ZLIB_OS_CODE );
1529 buff->zctrl.next_out = buff->zbuff + hdr_lgth;
1530 buff->zctrl.avail_out = buff->size - hdr_lgth;
1531
1532 return ( buff );
1533 }
1534
1535 /**
1536 * xmlZMemBuffExtend
1537 * @buff: Buffer used to compress and consolidate data.
1538 * @ext_amt: Number of bytes to extend the buffer.
1539 *
1540 * Extend the internal buffer used to store the compressed data by the
1541 * specified amount.
1542 *
1543 * Returns 0 on success or -1 on failure to extend the buffer. On failure
1544 * the original buffer still exists at the original size.
1545 */
1546 static int
xmlZMemBuffExtend(xmlZMemBuffPtr buff,size_t ext_amt)1547 xmlZMemBuffExtend( xmlZMemBuffPtr buff, size_t ext_amt ) {
1548
1549 int rc = -1;
1550 size_t new_size;
1551 size_t cur_used;
1552
1553 unsigned char * tmp_ptr = NULL;
1554
1555 if ( buff == NULL )
1556 return ( -1 );
1557
1558 else if ( ext_amt == 0 )
1559 return ( 0 );
1560
1561 cur_used = buff->zctrl.next_out - buff->zbuff;
1562 new_size = buff->size + ext_amt;
1563
1564 #ifdef DEBUG_HTTP
1565 if ( cur_used > new_size )
1566 xmlGenericError( xmlGenericErrorContext,
1567 "xmlZMemBuffExtend: %s\n%s %d bytes.\n",
1568 "Buffer overwrite detected during compressed memory",
1569 "buffer extension. Overflowed by",
1570 (cur_used - new_size ) );
1571 #endif
1572
1573 tmp_ptr = xmlRealloc( buff->zbuff, new_size );
1574 if ( tmp_ptr != NULL ) {
1575 rc = 0;
1576 buff->size = new_size;
1577 buff->zbuff = tmp_ptr;
1578 buff->zctrl.next_out = tmp_ptr + cur_used;
1579 buff->zctrl.avail_out = new_size - cur_used;
1580 }
1581 else {
1582 xmlChar msg[500];
1583 xmlStrPrintf(msg, 500,
1584 "xmlZMemBuffExtend: %s %lu bytes.\n",
1585 "Allocation failure extending output buffer to",
1586 (unsigned long) new_size );
1587 xmlIOErr(XML_IO_WRITE, (const char *) msg);
1588 }
1589
1590 return ( rc );
1591 }
1592
1593 /**
1594 * xmlZMemBuffAppend
1595 * @buff: Buffer used to compress and consolidate data
1596 * @src: Uncompressed source content to append to buffer
1597 * @len: Length of source data to append to buffer
1598 *
1599 * Compress and append data to the internal buffer. The data buffer
1600 * will be expanded if needed to store the additional data.
1601 *
1602 * Returns the number of bytes appended to the buffer or -1 on error.
1603 */
1604 static int
xmlZMemBuffAppend(xmlZMemBuffPtr buff,const char * src,int len)1605 xmlZMemBuffAppend( xmlZMemBuffPtr buff, const char * src, int len ) {
1606
1607 int z_err;
1608 size_t min_accept;
1609
1610 if ( ( buff == NULL ) || ( src == NULL ) )
1611 return ( -1 );
1612
1613 buff->zctrl.avail_in = len;
1614 buff->zctrl.next_in = (unsigned char *)src;
1615 while ( buff->zctrl.avail_in > 0 ) {
1616 /*
1617 ** Extend the buffer prior to deflate call if a reasonable amount
1618 ** of output buffer space is not available.
1619 */
1620 min_accept = buff->zctrl.avail_in / DFLT_ZLIB_RATIO;
1621 if ( buff->zctrl.avail_out <= min_accept ) {
1622 if ( xmlZMemBuffExtend( buff, buff->size ) == -1 )
1623 return ( -1 );
1624 }
1625
1626 z_err = deflate( &buff->zctrl, Z_NO_FLUSH );
1627 if ( z_err != Z_OK ) {
1628 xmlChar msg[500];
1629 xmlStrPrintf(msg, 500,
1630 "xmlZMemBuffAppend: %s %d %s - %d",
1631 "Compression error while appending",
1632 len, "bytes to buffer. ZLIB error", z_err );
1633 xmlIOErr(XML_IO_WRITE, (const char *) msg);
1634 return ( -1 );
1635 }
1636 }
1637
1638 buff->crc = crc32( buff->crc, (unsigned char *)src, len );
1639
1640 return ( len );
1641 }
1642
1643 /**
1644 * xmlZMemBuffGetContent
1645 * @buff: Compressed memory content buffer
1646 * @data_ref: Pointer reference to point to compressed content
1647 *
1648 * Flushes the compression buffers, appends gzip file trailers and
1649 * returns the compressed content and length of the compressed data.
1650 * NOTE: The gzip trailer code here is plagiarized from zlib source.
1651 *
1652 * Returns the length of the compressed data or -1 on error.
1653 */
1654 static int
xmlZMemBuffGetContent(xmlZMemBuffPtr buff,char ** data_ref)1655 xmlZMemBuffGetContent( xmlZMemBuffPtr buff, char ** data_ref ) {
1656
1657 int zlgth = -1;
1658 int z_err;
1659
1660 if ( ( buff == NULL ) || ( data_ref == NULL ) )
1661 return ( -1 );
1662
1663 /* Need to loop until compression output buffers are flushed */
1664
1665 do
1666 {
1667 z_err = deflate( &buff->zctrl, Z_FINISH );
1668 if ( z_err == Z_OK ) {
1669 /* In this case Z_OK means more buffer space needed */
1670
1671 if ( xmlZMemBuffExtend( buff, buff->size ) == -1 )
1672 return ( -1 );
1673 }
1674 }
1675 while ( z_err == Z_OK );
1676
1677 /* If the compression state is not Z_STREAM_END, some error occurred */
1678
1679 if ( z_err == Z_STREAM_END ) {
1680
1681 /* Need to append the gzip data trailer */
1682
1683 if ( buff->zctrl.avail_out < ( 2 * sizeof( unsigned long ) ) ) {
1684 if ( xmlZMemBuffExtend(buff, (2 * sizeof(unsigned long))) == -1 )
1685 return ( -1 );
1686 }
1687
1688 /*
1689 ** For whatever reason, the CRC and length data are pushed out
1690 ** in reverse byte order. So a memcpy can't be used here.
1691 */
1692
1693 append_reverse_ulong( buff, buff->crc );
1694 append_reverse_ulong( buff, buff->zctrl.total_in );
1695
1696 zlgth = buff->zctrl.next_out - buff->zbuff;
1697 *data_ref = (char *)buff->zbuff;
1698 }
1699
1700 else {
1701 xmlChar msg[500];
1702 xmlStrPrintf(msg, 500,
1703 "xmlZMemBuffGetContent: %s - %d\n",
1704 "Error flushing zlib buffers. Error code", z_err );
1705 xmlIOErr(XML_IO_WRITE, (const char *) msg);
1706 }
1707
1708 return ( zlgth );
1709 }
1710 #endif /* LIBXML_OUTPUT_ENABLED */
1711 #endif /* LIBXML_ZLIB_ENABLED */
1712
1713 #ifdef LIBXML_OUTPUT_ENABLED
1714 /**
1715 * xmlFreeHTTPWriteCtxt
1716 * @ctxt: Context to cleanup
1717 *
1718 * Free allocated memory and reclaim system resources.
1719 *
1720 * No return value.
1721 */
1722 static void
xmlFreeHTTPWriteCtxt(xmlIOHTTPWriteCtxtPtr ctxt)1723 xmlFreeHTTPWriteCtxt( xmlIOHTTPWriteCtxtPtr ctxt )
1724 {
1725 if ( ctxt->uri != NULL )
1726 xmlFree( ctxt->uri );
1727
1728 if ( ctxt->doc_buff != NULL ) {
1729
1730 #ifdef LIBXML_ZLIB_ENABLED
1731 if ( ctxt->compression > 0 ) {
1732 xmlFreeZMemBuff( ctxt->doc_buff );
1733 }
1734 else
1735 #endif
1736 {
1737 xmlOutputBufferClose( ctxt->doc_buff );
1738 }
1739 }
1740
1741 xmlFree( ctxt );
1742 return;
1743 }
1744 #endif /* LIBXML_OUTPUT_ENABLED */
1745
1746
1747 /**
1748 * xmlIOHTTPMatch:
1749 * @filename: the URI for matching
1750 *
1751 * check if the URI matches an HTTP one
1752 *
1753 * Returns 1 if matches, 0 otherwise
1754 */
1755 int
xmlIOHTTPMatch(const char * filename)1756 xmlIOHTTPMatch (const char *filename) {
1757 if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "http://", 7))
1758 return(1);
1759 return(0);
1760 }
1761
1762 /**
1763 * xmlIOHTTPOpen:
1764 * @filename: the URI for matching
1765 *
1766 * open an HTTP I/O channel
1767 *
1768 * Returns an I/O context or NULL in case of error
1769 */
1770 void *
xmlIOHTTPOpen(const char * filename)1771 xmlIOHTTPOpen (const char *filename) {
1772 return(xmlNanoHTTPOpen(filename, NULL));
1773 }
1774
1775 #ifdef LIBXML_OUTPUT_ENABLED
1776 /**
1777 * xmlIOHTTPOpenW:
1778 * @post_uri: The destination URI for the document
1779 * @compression: The compression desired for the document.
1780 *
1781 * Open a temporary buffer to collect the document for a subsequent HTTP POST
1782 * request. Non-static as is called from the output buffer creation routine.
1783 *
1784 * Returns an I/O context or NULL in case of error.
1785 */
1786
1787 void *
xmlIOHTTPOpenW(const char * post_uri,int compression ATTRIBUTE_UNUSED)1788 xmlIOHTTPOpenW(const char *post_uri, int compression ATTRIBUTE_UNUSED)
1789 {
1790
1791 xmlIOHTTPWriteCtxtPtr ctxt = NULL;
1792
1793 if (post_uri == NULL)
1794 return (NULL);
1795
1796 ctxt = xmlMalloc(sizeof(xmlIOHTTPWriteCtxt));
1797 if (ctxt == NULL) {
1798 xmlIOErrMemory("creating HTTP output context");
1799 return (NULL);
1800 }
1801
1802 (void) memset(ctxt, 0, sizeof(xmlIOHTTPWriteCtxt));
1803
1804 ctxt->uri = (char *) xmlStrdup((const xmlChar *)post_uri);
1805 if (ctxt->uri == NULL) {
1806 xmlIOErrMemory("copying URI");
1807 xmlFreeHTTPWriteCtxt(ctxt);
1808 return (NULL);
1809 }
1810
1811 /*
1812 * ** Since the document length is required for an HTTP post,
1813 * ** need to put the document into a buffer. A memory buffer
1814 * ** is being used to avoid pushing the data to disk and back.
1815 */
1816
1817 #ifdef LIBXML_ZLIB_ENABLED
1818 if ((compression > 0) && (compression <= 9)) {
1819
1820 ctxt->compression = compression;
1821 ctxt->doc_buff = xmlCreateZMemBuff(compression);
1822 } else
1823 #endif
1824 {
1825 /* Any character conversions should have been done before this */
1826
1827 ctxt->doc_buff = xmlAllocOutputBufferInternal(NULL);
1828 }
1829
1830 if (ctxt->doc_buff == NULL) {
1831 xmlFreeHTTPWriteCtxt(ctxt);
1832 ctxt = NULL;
1833 }
1834
1835 return (ctxt);
1836 }
1837 #endif /* LIBXML_OUTPUT_ENABLED */
1838
1839 #ifdef LIBXML_OUTPUT_ENABLED
1840 /**
1841 * xmlIOHTTPDfltOpenW
1842 * @post_uri: The destination URI for this document.
1843 *
1844 * Calls xmlIOHTTPOpenW with no compression to set up for a subsequent
1845 * HTTP post command. This function should generally not be used as
1846 * the open callback is short circuited in xmlOutputBufferCreateFile.
1847 *
1848 * Returns a pointer to the new IO context.
1849 */
1850 static void *
xmlIOHTTPDfltOpenW(const char * post_uri)1851 xmlIOHTTPDfltOpenW( const char * post_uri ) {
1852 return ( xmlIOHTTPOpenW( post_uri, 0 ) );
1853 }
1854 #endif /* LIBXML_OUTPUT_ENABLED */
1855
1856 /**
1857 * xmlIOHTTPRead:
1858 * @context: the I/O context
1859 * @buffer: where to drop data
1860 * @len: number of bytes to write
1861 *
1862 * Read @len bytes to @buffer from the I/O channel.
1863 *
1864 * Returns the number of bytes written
1865 */
1866 int
xmlIOHTTPRead(void * context,char * buffer,int len)1867 xmlIOHTTPRead(void * context, char * buffer, int len) {
1868 if ((buffer == NULL) || (len < 0)) return(-1);
1869 return(xmlNanoHTTPRead(context, &buffer[0], len));
1870 }
1871
1872 #ifdef LIBXML_OUTPUT_ENABLED
1873 /**
1874 * xmlIOHTTPWrite
1875 * @context: previously opened writing context
1876 * @buffer: data to output to temporary buffer
1877 * @len: bytes to output
1878 *
1879 * Collect data from memory buffer into a temporary file for later
1880 * processing.
1881 *
1882 * Returns number of bytes written.
1883 */
1884
1885 static int
xmlIOHTTPWrite(void * context,const char * buffer,int len)1886 xmlIOHTTPWrite( void * context, const char * buffer, int len ) {
1887
1888 xmlIOHTTPWriteCtxtPtr ctxt = context;
1889
1890 if ( ( ctxt == NULL ) || ( ctxt->doc_buff == NULL ) || ( buffer == NULL ) )
1891 return ( -1 );
1892
1893 if ( len > 0 ) {
1894
1895 /* Use gzwrite or fwrite as previously setup in the open call */
1896
1897 #ifdef LIBXML_ZLIB_ENABLED
1898 if ( ctxt->compression > 0 )
1899 len = xmlZMemBuffAppend( ctxt->doc_buff, buffer, len );
1900
1901 else
1902 #endif
1903 len = xmlOutputBufferWrite( ctxt->doc_buff, len, buffer );
1904
1905 if ( len < 0 ) {
1906 xmlChar msg[500];
1907 xmlStrPrintf(msg, 500,
1908 "xmlIOHTTPWrite: %s\n%s '%s'.\n",
1909 "Error appending to internal buffer.",
1910 "Error sending document to URI",
1911 ctxt->uri );
1912 xmlIOErr(XML_IO_WRITE, (const char *) msg);
1913 }
1914 }
1915
1916 return ( len );
1917 }
1918 #endif /* LIBXML_OUTPUT_ENABLED */
1919
1920
1921 /**
1922 * xmlIOHTTPClose:
1923 * @context: the I/O context
1924 *
1925 * Close an HTTP I/O channel
1926 *
1927 * Returns 0
1928 */
1929 int
xmlIOHTTPClose(void * context)1930 xmlIOHTTPClose (void * context) {
1931 xmlNanoHTTPClose(context);
1932 return 0;
1933 }
1934
1935 #ifdef LIBXML_OUTPUT_ENABLED
1936 /**
1937 * xmlIOHTTCloseWrite
1938 * @context: The I/O context
1939 * @http_mthd: The HTTP method to be used when sending the data
1940 *
1941 * Close the transmit HTTP I/O channel and actually send the data.
1942 */
1943 static int
xmlIOHTTPCloseWrite(void * context,const char * http_mthd)1944 xmlIOHTTPCloseWrite( void * context, const char * http_mthd ) {
1945
1946 int close_rc = -1;
1947 int http_rtn = 0;
1948 int content_lgth = 0;
1949 xmlIOHTTPWriteCtxtPtr ctxt = context;
1950
1951 char * http_content = NULL;
1952 char * content_encoding = NULL;
1953 char * content_type = (char *) "text/xml";
1954 void * http_ctxt = NULL;
1955
1956 if ( ( ctxt == NULL ) || ( http_mthd == NULL ) )
1957 return ( -1 );
1958
1959 /* Retrieve the content from the appropriate buffer */
1960
1961 #ifdef LIBXML_ZLIB_ENABLED
1962
1963 if ( ctxt->compression > 0 ) {
1964 content_lgth = xmlZMemBuffGetContent( ctxt->doc_buff, &http_content );
1965 content_encoding = (char *) "Content-Encoding: gzip";
1966 }
1967 else
1968 #endif
1969 {
1970 /* Pull the data out of the memory output buffer */
1971
1972 xmlOutputBufferPtr dctxt = ctxt->doc_buff;
1973 http_content = (char *) xmlBufContent(dctxt->buffer);
1974 content_lgth = xmlBufUse(dctxt->buffer);
1975 }
1976
1977 if ( http_content == NULL ) {
1978 xmlChar msg[500];
1979 xmlStrPrintf(msg, 500,
1980 "xmlIOHTTPCloseWrite: %s '%s' %s '%s'.\n",
1981 "Error retrieving content.\nUnable to",
1982 http_mthd, "data to URI", ctxt->uri );
1983 xmlIOErr(XML_IO_WRITE, (const char *) msg);
1984 }
1985
1986 else {
1987
1988 http_ctxt = xmlNanoHTTPMethod( ctxt->uri, http_mthd, http_content,
1989 &content_type, content_encoding,
1990 content_lgth );
1991
1992 if ( http_ctxt != NULL ) {
1993 #ifdef DEBUG_HTTP
1994 /* If testing/debugging - dump reply with request content */
1995
1996 FILE * tst_file = NULL;
1997 char buffer[ 4096 ];
1998 char * dump_name = NULL;
1999 int avail;
2000
2001 xmlGenericError( xmlGenericErrorContext,
2002 "xmlNanoHTTPCloseWrite: HTTP %s to\n%s returned %d.\n",
2003 http_mthd, ctxt->uri,
2004 xmlNanoHTTPReturnCode( http_ctxt ) );
2005
2006 /*
2007 ** Since either content or reply may be gzipped,
2008 ** dump them to separate files instead of the
2009 ** standard error context.
2010 */
2011
2012 dump_name = tempnam( NULL, "lxml" );
2013 if ( dump_name != NULL ) {
2014 (void)snprintf( buffer, sizeof(buffer), "%s.content", dump_name );
2015
2016 tst_file = fopen( buffer, "wb" );
2017 if ( tst_file != NULL ) {
2018 xmlGenericError( xmlGenericErrorContext,
2019 "Transmitted content saved in file: %s\n", buffer );
2020
2021 fwrite( http_content, sizeof( char ),
2022 content_lgth, tst_file );
2023 fclose( tst_file );
2024 }
2025
2026 (void)snprintf( buffer, sizeof(buffer), "%s.reply", dump_name );
2027 tst_file = fopen( buffer, "wb" );
2028 if ( tst_file != NULL ) {
2029 xmlGenericError( xmlGenericErrorContext,
2030 "Reply content saved in file: %s\n", buffer );
2031
2032
2033 while ( (avail = xmlNanoHTTPRead( http_ctxt,
2034 buffer, sizeof( buffer ) )) > 0 ) {
2035
2036 fwrite( buffer, sizeof( char ), avail, tst_file );
2037 }
2038
2039 fclose( tst_file );
2040 }
2041
2042 free( dump_name );
2043 }
2044 #endif /* DEBUG_HTTP */
2045
2046 http_rtn = xmlNanoHTTPReturnCode( http_ctxt );
2047 if ( ( http_rtn >= 200 ) && ( http_rtn < 300 ) )
2048 close_rc = 0;
2049 else {
2050 xmlChar msg[500];
2051 xmlStrPrintf(msg, 500,
2052 "xmlIOHTTPCloseWrite: HTTP '%s' of %d %s\n'%s' %s %d\n",
2053 http_mthd, content_lgth,
2054 "bytes to URI", ctxt->uri,
2055 "failed. HTTP return code:", http_rtn );
2056 xmlIOErr(XML_IO_WRITE, (const char *) msg);
2057 }
2058
2059 xmlNanoHTTPClose( http_ctxt );
2060 xmlFree( content_type );
2061 }
2062 }
2063
2064 /* Final cleanups */
2065
2066 xmlFreeHTTPWriteCtxt( ctxt );
2067
2068 return ( close_rc );
2069 }
2070
2071 /**
2072 * xmlIOHTTPClosePut
2073 *
2074 * @context: The I/O context
2075 *
2076 * Close the transmit HTTP I/O channel and actually send data using a PUT
2077 * HTTP method.
2078 */
2079 static int
xmlIOHTTPClosePut(void * ctxt)2080 xmlIOHTTPClosePut( void * ctxt ) {
2081 return ( xmlIOHTTPCloseWrite( ctxt, "PUT" ) );
2082 }
2083
2084
2085 /**
2086 * xmlIOHTTPClosePost
2087 *
2088 * @context: The I/O context
2089 *
2090 * Close the transmit HTTP I/O channel and actually send data using a POST
2091 * HTTP method.
2092 */
2093 static int
xmlIOHTTPClosePost(void * ctxt)2094 xmlIOHTTPClosePost( void * ctxt ) {
2095 return ( xmlIOHTTPCloseWrite( ctxt, "POST" ) );
2096 }
2097 #endif /* LIBXML_OUTPUT_ENABLED */
2098
2099 #endif /* LIBXML_HTTP_ENABLED */
2100
2101 #ifdef LIBXML_FTP_ENABLED
2102 /************************************************************************
2103 * *
2104 * I/O for FTP file accesses *
2105 * *
2106 ************************************************************************/
2107 /**
2108 * xmlIOFTPMatch:
2109 * @filename: the URI for matching
2110 *
2111 * check if the URI matches an FTP one
2112 *
2113 * Returns 1 if matches, 0 otherwise
2114 */
2115 int
xmlIOFTPMatch(const char * filename)2116 xmlIOFTPMatch (const char *filename) {
2117 if (!xmlStrncasecmp(BAD_CAST filename, BAD_CAST "ftp://", 6))
2118 return(1);
2119 return(0);
2120 }
2121
2122 /**
2123 * xmlIOFTPOpen:
2124 * @filename: the URI for matching
2125 *
2126 * open an FTP I/O channel
2127 *
2128 * Returns an I/O context or NULL in case of error
2129 */
2130 void *
xmlIOFTPOpen(const char * filename)2131 xmlIOFTPOpen (const char *filename) {
2132 return(xmlNanoFTPOpen(filename));
2133 }
2134
2135 /**
2136 * xmlIOFTPRead:
2137 * @context: the I/O context
2138 * @buffer: where to drop data
2139 * @len: number of bytes to write
2140 *
2141 * Read @len bytes to @buffer from the I/O channel.
2142 *
2143 * Returns the number of bytes written
2144 */
2145 int
xmlIOFTPRead(void * context,char * buffer,int len)2146 xmlIOFTPRead(void * context, char * buffer, int len) {
2147 if ((buffer == NULL) || (len < 0)) return(-1);
2148 return(xmlNanoFTPRead(context, &buffer[0], len));
2149 }
2150
2151 /**
2152 * xmlIOFTPClose:
2153 * @context: the I/O context
2154 *
2155 * Close an FTP I/O channel
2156 *
2157 * Returns 0
2158 */
2159 int
xmlIOFTPClose(void * context)2160 xmlIOFTPClose (void * context) {
2161 return ( xmlNanoFTPClose(context) );
2162 }
2163 #endif /* LIBXML_FTP_ENABLED */
2164
2165
2166 /**
2167 * xmlRegisterInputCallbacks:
2168 * @matchFunc: the xmlInputMatchCallback
2169 * @openFunc: the xmlInputOpenCallback
2170 * @readFunc: the xmlInputReadCallback
2171 * @closeFunc: the xmlInputCloseCallback
2172 *
2173 * Register a new set of I/O callback for handling parser input.
2174 *
2175 * Returns the registered handler number or -1 in case of error
2176 */
2177 int
xmlRegisterInputCallbacks(xmlInputMatchCallback matchFunc,xmlInputOpenCallback openFunc,xmlInputReadCallback readFunc,xmlInputCloseCallback closeFunc)2178 xmlRegisterInputCallbacks(xmlInputMatchCallback matchFunc,
2179 xmlInputOpenCallback openFunc, xmlInputReadCallback readFunc,
2180 xmlInputCloseCallback closeFunc) {
2181 if (xmlInputCallbackNr >= MAX_INPUT_CALLBACK) {
2182 return(-1);
2183 }
2184 xmlInputCallbackTable[xmlInputCallbackNr].matchcallback = matchFunc;
2185 xmlInputCallbackTable[xmlInputCallbackNr].opencallback = openFunc;
2186 xmlInputCallbackTable[xmlInputCallbackNr].readcallback = readFunc;
2187 xmlInputCallbackTable[xmlInputCallbackNr].closecallback = closeFunc;
2188 xmlInputCallbackInitialized = 1;
2189 return(xmlInputCallbackNr++);
2190 }
2191
2192 #ifdef LIBXML_OUTPUT_ENABLED
2193 /**
2194 * xmlRegisterOutputCallbacks:
2195 * @matchFunc: the xmlOutputMatchCallback
2196 * @openFunc: the xmlOutputOpenCallback
2197 * @writeFunc: the xmlOutputWriteCallback
2198 * @closeFunc: the xmlOutputCloseCallback
2199 *
2200 * Register a new set of I/O callback for handling output.
2201 *
2202 * Returns the registered handler number or -1 in case of error
2203 */
2204 int
xmlRegisterOutputCallbacks(xmlOutputMatchCallback matchFunc,xmlOutputOpenCallback openFunc,xmlOutputWriteCallback writeFunc,xmlOutputCloseCallback closeFunc)2205 xmlRegisterOutputCallbacks(xmlOutputMatchCallback matchFunc,
2206 xmlOutputOpenCallback openFunc, xmlOutputWriteCallback writeFunc,
2207 xmlOutputCloseCallback closeFunc) {
2208 if (xmlOutputCallbackNr >= MAX_OUTPUT_CALLBACK) {
2209 return(-1);
2210 }
2211 xmlOutputCallbackTable[xmlOutputCallbackNr].matchcallback = matchFunc;
2212 xmlOutputCallbackTable[xmlOutputCallbackNr].opencallback = openFunc;
2213 xmlOutputCallbackTable[xmlOutputCallbackNr].writecallback = writeFunc;
2214 xmlOutputCallbackTable[xmlOutputCallbackNr].closecallback = closeFunc;
2215 xmlOutputCallbackInitialized = 1;
2216 return(xmlOutputCallbackNr++);
2217 }
2218 #endif /* LIBXML_OUTPUT_ENABLED */
2219
2220 /**
2221 * xmlRegisterDefaultInputCallbacks:
2222 *
2223 * Registers the default compiled-in I/O handlers.
2224 */
2225 void
xmlRegisterDefaultInputCallbacks(void)2226 xmlRegisterDefaultInputCallbacks(void) {
2227 if (xmlInputCallbackInitialized)
2228 return;
2229
2230 xmlRegisterInputCallbacks(xmlFileMatch, xmlFileOpen,
2231 xmlFileRead, xmlFileClose);
2232 #ifdef LIBXML_ZLIB_ENABLED
2233 xmlRegisterInputCallbacks(xmlGzfileMatch, xmlGzfileOpen,
2234 xmlGzfileRead, xmlGzfileClose);
2235 #endif /* LIBXML_ZLIB_ENABLED */
2236 #ifdef LIBXML_LZMA_ENABLED
2237 xmlRegisterInputCallbacks(xmlXzfileMatch, xmlXzfileOpen,
2238 xmlXzfileRead, xmlXzfileClose);
2239 #endif /* LIBXML_LZMA_ENABLED */
2240
2241 #ifdef LIBXML_HTTP_ENABLED
2242 xmlRegisterInputCallbacks(xmlIOHTTPMatch, xmlIOHTTPOpen,
2243 xmlIOHTTPRead, xmlIOHTTPClose);
2244 #endif /* LIBXML_HTTP_ENABLED */
2245
2246 #ifdef LIBXML_FTP_ENABLED
2247 xmlRegisterInputCallbacks(xmlIOFTPMatch, xmlIOFTPOpen,
2248 xmlIOFTPRead, xmlIOFTPClose);
2249 #endif /* LIBXML_FTP_ENABLED */
2250 xmlInputCallbackInitialized = 1;
2251 }
2252
2253 #ifdef LIBXML_OUTPUT_ENABLED
2254 /**
2255 * xmlRegisterDefaultOutputCallbacks:
2256 *
2257 * Registers the default compiled-in I/O handlers.
2258 */
2259 void
xmlRegisterDefaultOutputCallbacks(void)2260 xmlRegisterDefaultOutputCallbacks (void) {
2261 if (xmlOutputCallbackInitialized)
2262 return;
2263
2264 xmlRegisterOutputCallbacks(xmlFileMatch, xmlFileOpenW,
2265 xmlFileWrite, xmlFileClose);
2266
2267 #ifdef LIBXML_HTTP_ENABLED
2268 xmlRegisterOutputCallbacks(xmlIOHTTPMatch, xmlIOHTTPDfltOpenW,
2269 xmlIOHTTPWrite, xmlIOHTTPClosePut);
2270 #endif
2271
2272 /*********************************
2273 No way a-priori to distinguish between gzipped files from
2274 uncompressed ones except opening if existing then closing
2275 and saving with same compression ratio ... a pain.
2276
2277 #ifdef LIBXML_ZLIB_ENABLED
2278 xmlRegisterOutputCallbacks(xmlGzfileMatch, xmlGzfileOpen,
2279 xmlGzfileWrite, xmlGzfileClose);
2280 #endif
2281
2282 Nor FTP PUT ....
2283 #ifdef LIBXML_FTP_ENABLED
2284 xmlRegisterOutputCallbacks(xmlIOFTPMatch, xmlIOFTPOpen,
2285 xmlIOFTPWrite, xmlIOFTPClose);
2286 #endif
2287 **********************************/
2288 xmlOutputCallbackInitialized = 1;
2289 }
2290
2291 #ifdef LIBXML_HTTP_ENABLED
2292 /**
2293 * xmlRegisterHTTPPostCallbacks:
2294 *
2295 * By default, libxml submits HTTP output requests using the "PUT" method.
2296 * Calling this method changes the HTTP output method to use the "POST"
2297 * method instead.
2298 *
2299 */
2300 void
xmlRegisterHTTPPostCallbacks(void)2301 xmlRegisterHTTPPostCallbacks( void ) {
2302
2303 /* Register defaults if not done previously */
2304
2305 if ( xmlOutputCallbackInitialized == 0 )
2306 xmlRegisterDefaultOutputCallbacks( );
2307
2308 xmlRegisterOutputCallbacks(xmlIOHTTPMatch, xmlIOHTTPDfltOpenW,
2309 xmlIOHTTPWrite, xmlIOHTTPClosePost);
2310 return;
2311 }
2312 #endif
2313 #endif /* LIBXML_OUTPUT_ENABLED */
2314
2315 /**
2316 * xmlAllocParserInputBuffer:
2317 * @enc: the charset encoding if known
2318 *
2319 * Create a buffered parser input for progressive parsing
2320 *
2321 * Returns the new parser input or NULL
2322 */
2323 xmlParserInputBufferPtr
xmlAllocParserInputBuffer(xmlCharEncoding enc)2324 xmlAllocParserInputBuffer(xmlCharEncoding enc) {
2325 xmlParserInputBufferPtr ret;
2326
2327 ret = (xmlParserInputBufferPtr) xmlMalloc(sizeof(xmlParserInputBuffer));
2328 if (ret == NULL) {
2329 xmlIOErrMemory("creating input buffer");
2330 return(NULL);
2331 }
2332 memset(ret, 0, (size_t) sizeof(xmlParserInputBuffer));
2333 ret->buffer = xmlBufCreateSize(2 * xmlDefaultBufferSize);
2334 if (ret->buffer == NULL) {
2335 xmlFree(ret);
2336 return(NULL);
2337 }
2338 xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_DOUBLEIT);
2339 ret->encoder = xmlGetCharEncodingHandler(enc);
2340 if (ret->encoder != NULL)
2341 ret->raw = xmlBufCreateSize(2 * xmlDefaultBufferSize);
2342 else
2343 ret->raw = NULL;
2344 ret->readcallback = NULL;
2345 ret->closecallback = NULL;
2346 ret->context = NULL;
2347 ret->compressed = -1;
2348 ret->rawconsumed = 0;
2349
2350 return(ret);
2351 }
2352
2353 #ifdef LIBXML_OUTPUT_ENABLED
2354 /**
2355 * xmlAllocOutputBuffer:
2356 * @encoder: the encoding converter or NULL
2357 *
2358 * Create a buffered parser output
2359 *
2360 * Returns the new parser output or NULL
2361 */
2362 xmlOutputBufferPtr
xmlAllocOutputBuffer(xmlCharEncodingHandlerPtr encoder)2363 xmlAllocOutputBuffer(xmlCharEncodingHandlerPtr encoder) {
2364 xmlOutputBufferPtr ret;
2365
2366 ret = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer));
2367 if (ret == NULL) {
2368 xmlIOErrMemory("creating output buffer");
2369 return(NULL);
2370 }
2371 memset(ret, 0, (size_t) sizeof(xmlOutputBuffer));
2372 ret->buffer = xmlBufCreate();
2373 if (ret->buffer == NULL) {
2374 xmlFree(ret);
2375 return(NULL);
2376 }
2377
2378 /* try to avoid a performance problem with Windows realloc() */
2379 if (xmlBufGetAllocationScheme(ret->buffer) == XML_BUFFER_ALLOC_EXACT)
2380 xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_DOUBLEIT);
2381
2382 ret->encoder = encoder;
2383 if (encoder != NULL) {
2384 ret->conv = xmlBufCreateSize(4000);
2385 if (ret->conv == NULL) {
2386 xmlFree(ret);
2387 return(NULL);
2388 }
2389
2390 /*
2391 * This call is designed to initiate the encoder state
2392 */
2393 xmlCharEncOutput(ret, 1);
2394 } else
2395 ret->conv = NULL;
2396 ret->writecallback = NULL;
2397 ret->closecallback = NULL;
2398 ret->context = NULL;
2399 ret->written = 0;
2400
2401 return(ret);
2402 }
2403
2404 /**
2405 * xmlAllocOutputBufferInternal:
2406 * @encoder: the encoding converter or NULL
2407 *
2408 * Create a buffered parser output
2409 *
2410 * Returns the new parser output or NULL
2411 */
2412 xmlOutputBufferPtr
xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder)2413 xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder) {
2414 xmlOutputBufferPtr ret;
2415
2416 ret = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer));
2417 if (ret == NULL) {
2418 xmlIOErrMemory("creating output buffer");
2419 return(NULL);
2420 }
2421 memset(ret, 0, (size_t) sizeof(xmlOutputBuffer));
2422 ret->buffer = xmlBufCreate();
2423 if (ret->buffer == NULL) {
2424 xmlFree(ret);
2425 return(NULL);
2426 }
2427
2428
2429 /*
2430 * For conversion buffers we use the special IO handling
2431 */
2432 xmlBufSetAllocationScheme(ret->buffer, XML_BUFFER_ALLOC_IO);
2433
2434 ret->encoder = encoder;
2435 if (encoder != NULL) {
2436 ret->conv = xmlBufCreateSize(4000);
2437 if (ret->conv == NULL) {
2438 xmlFree(ret);
2439 return(NULL);
2440 }
2441
2442 /*
2443 * This call is designed to initiate the encoder state
2444 */
2445 xmlCharEncOutput(ret, 1);
2446 } else
2447 ret->conv = NULL;
2448 ret->writecallback = NULL;
2449 ret->closecallback = NULL;
2450 ret->context = NULL;
2451 ret->written = 0;
2452
2453 return(ret);
2454 }
2455
2456 #endif /* LIBXML_OUTPUT_ENABLED */
2457
2458 /**
2459 * xmlFreeParserInputBuffer:
2460 * @in: a buffered parser input
2461 *
2462 * Free up the memory used by a buffered parser input
2463 */
2464 void
xmlFreeParserInputBuffer(xmlParserInputBufferPtr in)2465 xmlFreeParserInputBuffer(xmlParserInputBufferPtr in) {
2466 if (in == NULL) return;
2467
2468 if (in->raw) {
2469 xmlBufFree(in->raw);
2470 in->raw = NULL;
2471 }
2472 if (in->encoder != NULL) {
2473 xmlCharEncCloseFunc(in->encoder);
2474 }
2475 if (in->closecallback != NULL) {
2476 in->closecallback(in->context);
2477 }
2478 if (in->buffer != NULL) {
2479 xmlBufFree(in->buffer);
2480 in->buffer = NULL;
2481 }
2482
2483 xmlFree(in);
2484 }
2485
2486 #ifdef LIBXML_OUTPUT_ENABLED
2487 /**
2488 * xmlOutputBufferClose:
2489 * @out: a buffered output
2490 *
2491 * flushes and close the output I/O channel
2492 * and free up all the associated resources
2493 *
2494 * Returns the number of byte written or -1 in case of error.
2495 */
2496 int
xmlOutputBufferClose(xmlOutputBufferPtr out)2497 xmlOutputBufferClose(xmlOutputBufferPtr out)
2498 {
2499 int written;
2500 int err_rc = 0;
2501
2502 if (out == NULL)
2503 return (-1);
2504 if (out->writecallback != NULL)
2505 xmlOutputBufferFlush(out);
2506 if (out->closecallback != NULL) {
2507 err_rc = out->closecallback(out->context);
2508 }
2509 written = out->written;
2510 if (out->conv) {
2511 xmlBufFree(out->conv);
2512 out->conv = NULL;
2513 }
2514 if (out->encoder != NULL) {
2515 xmlCharEncCloseFunc(out->encoder);
2516 }
2517 if (out->buffer != NULL) {
2518 xmlBufFree(out->buffer);
2519 out->buffer = NULL;
2520 }
2521
2522 if (out->error)
2523 err_rc = -1;
2524 xmlFree(out);
2525 return ((err_rc == 0) ? written : err_rc);
2526 }
2527 #endif /* LIBXML_OUTPUT_ENABLED */
2528
2529 xmlParserInputBufferPtr
__xmlParserInputBufferCreateFilename(const char * URI,xmlCharEncoding enc)2530 __xmlParserInputBufferCreateFilename(const char *URI, xmlCharEncoding enc) {
2531 xmlParserInputBufferPtr ret;
2532 int i = 0;
2533 void *context = NULL;
2534
2535 if (xmlInputCallbackInitialized == 0)
2536 xmlRegisterDefaultInputCallbacks();
2537
2538 if (URI == NULL) return(NULL);
2539
2540 /*
2541 * Try to find one of the input accept method accepting that scheme
2542 * Go in reverse to give precedence to user defined handlers.
2543 */
2544 if (context == NULL) {
2545 for (i = xmlInputCallbackNr - 1;i >= 0;i--) {
2546 if ((xmlInputCallbackTable[i].matchcallback != NULL) &&
2547 (xmlInputCallbackTable[i].matchcallback(URI) != 0)) {
2548 context = xmlInputCallbackTable[i].opencallback(URI);
2549 if (context != NULL) {
2550 break;
2551 }
2552 }
2553 }
2554 }
2555 if (context == NULL) {
2556 return(NULL);
2557 }
2558
2559 /*
2560 * Allocate the Input buffer front-end.
2561 */
2562 ret = xmlAllocParserInputBuffer(enc);
2563 if (ret != NULL) {
2564 ret->context = context;
2565 ret->readcallback = xmlInputCallbackTable[i].readcallback;
2566 ret->closecallback = xmlInputCallbackTable[i].closecallback;
2567 #ifdef LIBXML_ZLIB_ENABLED
2568 if ((xmlInputCallbackTable[i].opencallback == xmlGzfileOpen) &&
2569 (strcmp(URI, "-") != 0)) {
2570 #if defined(ZLIB_VERNUM) && ZLIB_VERNUM >= 0x1230
2571 ret->compressed = !gzdirect(context);
2572 #else
2573 if (((z_stream *)context)->avail_in > 4) {
2574 char *cptr, buff4[4];
2575 cptr = (char *) ((z_stream *)context)->next_in;
2576 if (gzread(context, buff4, 4) == 4) {
2577 if (strncmp(buff4, cptr, 4) == 0)
2578 ret->compressed = 0;
2579 else
2580 ret->compressed = 1;
2581 gzrewind(context);
2582 }
2583 }
2584 #endif
2585 }
2586 #endif
2587 #ifdef LIBXML_LZMA_ENABLED
2588 if ((xmlInputCallbackTable[i].opencallback == xmlXzfileOpen) &&
2589 (strcmp(URI, "-") != 0)) {
2590 ret->compressed = __libxml2_xzcompressed(context);
2591 }
2592 #endif
2593 }
2594 else
2595 xmlInputCallbackTable[i].closecallback (context);
2596
2597 return(ret);
2598 }
2599
2600 /**
2601 * xmlParserInputBufferCreateFilename:
2602 * @URI: a C string containing the URI or filename
2603 * @enc: the charset encoding if known
2604 *
2605 * Create a buffered parser input for the progressive parsing of a file
2606 * If filename is "-' then we use stdin as the input.
2607 * Automatic support for ZLIB/Compress compressed document is provided
2608 * by default if found at compile-time.
2609 * Do an encoding check if enc == XML_CHAR_ENCODING_NONE
2610 *
2611 * Returns the new parser input or NULL
2612 */
2613 xmlParserInputBufferPtr
xmlParserInputBufferCreateFilename(const char * URI,xmlCharEncoding enc)2614 xmlParserInputBufferCreateFilename(const char *URI, xmlCharEncoding enc) {
2615 if ((xmlParserInputBufferCreateFilenameValue)) {
2616 return xmlParserInputBufferCreateFilenameValue(URI, enc);
2617 }
2618 return __xmlParserInputBufferCreateFilename(URI, enc);
2619 }
2620
2621 #ifdef LIBXML_OUTPUT_ENABLED
2622 xmlOutputBufferPtr
__xmlOutputBufferCreateFilename(const char * URI,xmlCharEncodingHandlerPtr encoder,int compression ATTRIBUTE_UNUSED)2623 __xmlOutputBufferCreateFilename(const char *URI,
2624 xmlCharEncodingHandlerPtr encoder,
2625 int compression ATTRIBUTE_UNUSED) {
2626 xmlOutputBufferPtr ret;
2627 xmlURIPtr puri;
2628 int i = 0;
2629 void *context = NULL;
2630 char *unescaped = NULL;
2631 #ifdef LIBXML_ZLIB_ENABLED
2632 int is_file_uri = 1;
2633 #endif
2634
2635 if (xmlOutputCallbackInitialized == 0)
2636 xmlRegisterDefaultOutputCallbacks();
2637
2638 if (URI == NULL) return(NULL);
2639
2640 puri = xmlParseURI(URI);
2641 if (puri != NULL) {
2642 #ifdef LIBXML_ZLIB_ENABLED
2643 if ((puri->scheme != NULL) &&
2644 (!xmlStrEqual(BAD_CAST puri->scheme, BAD_CAST "file")))
2645 is_file_uri = 0;
2646 #endif
2647 /*
2648 * try to limit the damages of the URI unescaping code.
2649 */
2650 if ((puri->scheme == NULL) ||
2651 (xmlStrEqual(BAD_CAST puri->scheme, BAD_CAST "file")))
2652 unescaped = xmlURIUnescapeString(URI, 0, NULL);
2653 xmlFreeURI(puri);
2654 }
2655
2656 /*
2657 * Try to find one of the output accept method accepting that scheme
2658 * Go in reverse to give precedence to user defined handlers.
2659 * try with an unescaped version of the URI
2660 */
2661 if (unescaped != NULL) {
2662 #ifdef LIBXML_ZLIB_ENABLED
2663 if ((compression > 0) && (compression <= 9) && (is_file_uri == 1)) {
2664 context = xmlGzfileOpenW(unescaped, compression);
2665 if (context != NULL) {
2666 ret = xmlAllocOutputBufferInternal(encoder);
2667 if (ret != NULL) {
2668 ret->context = context;
2669 ret->writecallback = xmlGzfileWrite;
2670 ret->closecallback = xmlGzfileClose;
2671 }
2672 xmlFree(unescaped);
2673 return(ret);
2674 }
2675 }
2676 #endif
2677 for (i = xmlOutputCallbackNr - 1;i >= 0;i--) {
2678 if ((xmlOutputCallbackTable[i].matchcallback != NULL) &&
2679 (xmlOutputCallbackTable[i].matchcallback(unescaped) != 0)) {
2680 #if defined(LIBXML_HTTP_ENABLED) && defined(LIBXML_ZLIB_ENABLED)
2681 /* Need to pass compression parameter into HTTP open calls */
2682 if (xmlOutputCallbackTable[i].matchcallback == xmlIOHTTPMatch)
2683 context = xmlIOHTTPOpenW(unescaped, compression);
2684 else
2685 #endif
2686 context = xmlOutputCallbackTable[i].opencallback(unescaped);
2687 if (context != NULL)
2688 break;
2689 }
2690 }
2691 xmlFree(unescaped);
2692 }
2693
2694 /*
2695 * If this failed try with a non-escaped URI this may be a strange
2696 * filename
2697 */
2698 if (context == NULL) {
2699 #ifdef LIBXML_ZLIB_ENABLED
2700 if ((compression > 0) && (compression <= 9) && (is_file_uri == 1)) {
2701 context = xmlGzfileOpenW(URI, compression);
2702 if (context != NULL) {
2703 ret = xmlAllocOutputBufferInternal(encoder);
2704 if (ret != NULL) {
2705 ret->context = context;
2706 ret->writecallback = xmlGzfileWrite;
2707 ret->closecallback = xmlGzfileClose;
2708 }
2709 return(ret);
2710 }
2711 }
2712 #endif
2713 for (i = xmlOutputCallbackNr - 1;i >= 0;i--) {
2714 if ((xmlOutputCallbackTable[i].matchcallback != NULL) &&
2715 (xmlOutputCallbackTable[i].matchcallback(URI) != 0)) {
2716 #if defined(LIBXML_HTTP_ENABLED) && defined(LIBXML_ZLIB_ENABLED)
2717 /* Need to pass compression parameter into HTTP open calls */
2718 if (xmlOutputCallbackTable[i].matchcallback == xmlIOHTTPMatch)
2719 context = xmlIOHTTPOpenW(URI, compression);
2720 else
2721 #endif
2722 context = xmlOutputCallbackTable[i].opencallback(URI);
2723 if (context != NULL)
2724 break;
2725 }
2726 }
2727 }
2728
2729 if (context == NULL) {
2730 return(NULL);
2731 }
2732
2733 /*
2734 * Allocate the Output buffer front-end.
2735 */
2736 ret = xmlAllocOutputBufferInternal(encoder);
2737 if (ret != NULL) {
2738 ret->context = context;
2739 ret->writecallback = xmlOutputCallbackTable[i].writecallback;
2740 ret->closecallback = xmlOutputCallbackTable[i].closecallback;
2741 }
2742 return(ret);
2743 }
2744
2745 /**
2746 * xmlOutputBufferCreateFilename:
2747 * @URI: a C string containing the URI or filename
2748 * @encoder: the encoding converter or NULL
2749 * @compression: the compression ration (0 none, 9 max).
2750 *
2751 * Create a buffered output for the progressive saving of a file
2752 * If filename is "-' then we use stdout as the output.
2753 * Automatic support for ZLIB/Compress compressed document is provided
2754 * by default if found at compile-time.
2755 * TODO: currently if compression is set, the library only support
2756 * writing to a local file.
2757 *
2758 * Returns the new output or NULL
2759 */
2760 xmlOutputBufferPtr
xmlOutputBufferCreateFilename(const char * URI,xmlCharEncodingHandlerPtr encoder,int compression ATTRIBUTE_UNUSED)2761 xmlOutputBufferCreateFilename(const char *URI,
2762 xmlCharEncodingHandlerPtr encoder,
2763 int compression ATTRIBUTE_UNUSED) {
2764 if ((xmlOutputBufferCreateFilenameValue)) {
2765 return xmlOutputBufferCreateFilenameValue(URI, encoder, compression);
2766 }
2767 return __xmlOutputBufferCreateFilename(URI, encoder, compression);
2768 }
2769 #endif /* LIBXML_OUTPUT_ENABLED */
2770
2771 /**
2772 * xmlParserInputBufferCreateFile:
2773 * @file: a FILE*
2774 * @enc: the charset encoding if known
2775 *
2776 * Create a buffered parser input for the progressive parsing of a FILE *
2777 * buffered C I/O
2778 *
2779 * Returns the new parser input or NULL
2780 */
2781 xmlParserInputBufferPtr
xmlParserInputBufferCreateFile(FILE * file,xmlCharEncoding enc)2782 xmlParserInputBufferCreateFile(FILE *file, xmlCharEncoding enc) {
2783 xmlParserInputBufferPtr ret;
2784
2785 if (xmlInputCallbackInitialized == 0)
2786 xmlRegisterDefaultInputCallbacks();
2787
2788 if (file == NULL) return(NULL);
2789
2790 ret = xmlAllocParserInputBuffer(enc);
2791 if (ret != NULL) {
2792 ret->context = file;
2793 ret->readcallback = xmlFileRead;
2794 ret->closecallback = xmlFileFlush;
2795 }
2796
2797 return(ret);
2798 }
2799
2800 #ifdef LIBXML_OUTPUT_ENABLED
2801 /**
2802 * xmlOutputBufferCreateFile:
2803 * @file: a FILE*
2804 * @encoder: the encoding converter or NULL
2805 *
2806 * Create a buffered output for the progressive saving to a FILE *
2807 * buffered C I/O
2808 *
2809 * Returns the new parser output or NULL
2810 */
2811 xmlOutputBufferPtr
xmlOutputBufferCreateFile(FILE * file,xmlCharEncodingHandlerPtr encoder)2812 xmlOutputBufferCreateFile(FILE *file, xmlCharEncodingHandlerPtr encoder) {
2813 xmlOutputBufferPtr ret;
2814
2815 if (xmlOutputCallbackInitialized == 0)
2816 xmlRegisterDefaultOutputCallbacks();
2817
2818 if (file == NULL) return(NULL);
2819
2820 ret = xmlAllocOutputBufferInternal(encoder);
2821 if (ret != NULL) {
2822 ret->context = file;
2823 ret->writecallback = xmlFileWrite;
2824 ret->closecallback = xmlFileFlush;
2825 }
2826
2827 return(ret);
2828 }
2829
2830 /**
2831 * xmlOutputBufferCreateBuffer:
2832 * @buffer: a xmlBufferPtr
2833 * @encoder: the encoding converter or NULL
2834 *
2835 * Create a buffered output for the progressive saving to a xmlBuffer
2836 *
2837 * Returns the new parser output or NULL
2838 */
2839 xmlOutputBufferPtr
xmlOutputBufferCreateBuffer(xmlBufferPtr buffer,xmlCharEncodingHandlerPtr encoder)2840 xmlOutputBufferCreateBuffer(xmlBufferPtr buffer,
2841 xmlCharEncodingHandlerPtr encoder) {
2842 xmlOutputBufferPtr ret;
2843
2844 if (buffer == NULL) return(NULL);
2845
2846 ret = xmlOutputBufferCreateIO(xmlBufferWrite, NULL, (void *) buffer,
2847 encoder);
2848
2849 return(ret);
2850 }
2851
2852 /**
2853 * xmlOutputBufferGetContent:
2854 * @out: an xmlOutputBufferPtr
2855 *
2856 * Gives a pointer to the data currently held in the output buffer
2857 *
2858 * Returns a pointer to the data or NULL in case of error
2859 */
2860 const xmlChar *
xmlOutputBufferGetContent(xmlOutputBufferPtr out)2861 xmlOutputBufferGetContent(xmlOutputBufferPtr out) {
2862 if ((out == NULL) || (out->buffer == NULL))
2863 return(NULL);
2864
2865 return(xmlBufContent(out->buffer));
2866 }
2867
2868 /**
2869 * xmlOutputBufferGetSize:
2870 * @out: an xmlOutputBufferPtr
2871 *
2872 * Gives the length of the data currently held in the output buffer
2873 *
2874 * Returns 0 in case or error or no data is held, the size otherwise
2875 */
2876 size_t
xmlOutputBufferGetSize(xmlOutputBufferPtr out)2877 xmlOutputBufferGetSize(xmlOutputBufferPtr out) {
2878 if ((out == NULL) || (out->buffer == NULL))
2879 return(0);
2880
2881 return(xmlBufUse(out->buffer));
2882 }
2883
2884
2885 #endif /* LIBXML_OUTPUT_ENABLED */
2886
2887 /**
2888 * xmlParserInputBufferCreateFd:
2889 * @fd: a file descriptor number
2890 * @enc: the charset encoding if known
2891 *
2892 * Create a buffered parser input for the progressive parsing for the input
2893 * from a file descriptor
2894 *
2895 * Returns the new parser input or NULL
2896 */
2897 xmlParserInputBufferPtr
xmlParserInputBufferCreateFd(int fd,xmlCharEncoding enc)2898 xmlParserInputBufferCreateFd(int fd, xmlCharEncoding enc) {
2899 xmlParserInputBufferPtr ret;
2900
2901 if (fd < 0) return(NULL);
2902
2903 ret = xmlAllocParserInputBuffer(enc);
2904 if (ret != NULL) {
2905 ret->context = (void *) (ptrdiff_t) fd;
2906 ret->readcallback = xmlFdRead;
2907 ret->closecallback = xmlFdClose;
2908 }
2909
2910 return(ret);
2911 }
2912
2913 /**
2914 * xmlParserInputBufferCreateMem:
2915 * @mem: the memory input
2916 * @size: the length of the memory block
2917 * @enc: the charset encoding if known
2918 *
2919 * Create a buffered parser input for the progressive parsing for the input
2920 * from a memory area.
2921 *
2922 * Returns the new parser input or NULL
2923 */
2924 xmlParserInputBufferPtr
xmlParserInputBufferCreateMem(const char * mem,int size,xmlCharEncoding enc)2925 xmlParserInputBufferCreateMem(const char *mem, int size, xmlCharEncoding enc) {
2926 xmlParserInputBufferPtr ret;
2927 int errcode;
2928
2929 if (size < 0) return(NULL);
2930 if (mem == NULL) return(NULL);
2931
2932 ret = xmlAllocParserInputBuffer(enc);
2933 if (ret != NULL) {
2934 ret->context = (void *) mem;
2935 ret->readcallback = xmlInputReadCallbackNop;
2936 ret->closecallback = NULL;
2937 errcode = xmlBufAdd(ret->buffer, (const xmlChar *) mem, size);
2938 if (errcode != 0) {
2939 xmlFree(ret);
2940 return(NULL);
2941 }
2942 }
2943
2944 return(ret);
2945 }
2946
2947 /**
2948 * xmlParserInputBufferCreateStatic:
2949 * @mem: the memory input
2950 * @size: the length of the memory block
2951 * @enc: the charset encoding if known
2952 *
2953 * Create a buffered parser input for the progressive parsing for the input
2954 * from an immutable memory area. This will not copy the memory area to
2955 * the buffer, but the memory is expected to be available until the end of
2956 * the parsing, this is useful for example when using mmap'ed file.
2957 *
2958 * Returns the new parser input or NULL
2959 */
2960 xmlParserInputBufferPtr
xmlParserInputBufferCreateStatic(const char * mem,int size,xmlCharEncoding enc)2961 xmlParserInputBufferCreateStatic(const char *mem, int size,
2962 xmlCharEncoding enc) {
2963 xmlParserInputBufferPtr ret;
2964
2965 if (size < 0) return(NULL);
2966 if (mem == NULL) return(NULL);
2967
2968 ret = (xmlParserInputBufferPtr) xmlMalloc(sizeof(xmlParserInputBuffer));
2969 if (ret == NULL) {
2970 xmlIOErrMemory("creating input buffer");
2971 return(NULL);
2972 }
2973 memset(ret, 0, (size_t) sizeof(xmlParserInputBuffer));
2974 ret->buffer = xmlBufCreateStatic((void *)mem, (size_t) size);
2975 if (ret->buffer == NULL) {
2976 xmlFree(ret);
2977 return(NULL);
2978 }
2979 ret->encoder = xmlGetCharEncodingHandler(enc);
2980 if (ret->encoder != NULL)
2981 ret->raw = xmlBufCreateSize(2 * xmlDefaultBufferSize);
2982 else
2983 ret->raw = NULL;
2984 ret->compressed = -1;
2985 ret->context = (void *) mem;
2986 ret->readcallback = NULL;
2987 ret->closecallback = NULL;
2988
2989 return(ret);
2990 }
2991
2992 #ifdef LIBXML_OUTPUT_ENABLED
2993 /**
2994 * xmlOutputBufferCreateFd:
2995 * @fd: a file descriptor number
2996 * @encoder: the encoding converter or NULL
2997 *
2998 * Create a buffered output for the progressive saving
2999 * to a file descriptor
3000 *
3001 * Returns the new parser output or NULL
3002 */
3003 xmlOutputBufferPtr
xmlOutputBufferCreateFd(int fd,xmlCharEncodingHandlerPtr encoder)3004 xmlOutputBufferCreateFd(int fd, xmlCharEncodingHandlerPtr encoder) {
3005 xmlOutputBufferPtr ret;
3006
3007 if (fd < 0) return(NULL);
3008
3009 ret = xmlAllocOutputBufferInternal(encoder);
3010 if (ret != NULL) {
3011 ret->context = (void *) (ptrdiff_t) fd;
3012 ret->writecallback = xmlFdWrite;
3013 ret->closecallback = NULL;
3014 }
3015
3016 return(ret);
3017 }
3018 #endif /* LIBXML_OUTPUT_ENABLED */
3019
3020 /**
3021 * xmlParserInputBufferCreateIO:
3022 * @ioread: an I/O read function
3023 * @ioclose: an I/O close function
3024 * @ioctx: an I/O handler
3025 * @enc: the charset encoding if known
3026 *
3027 * Create a buffered parser input for the progressive parsing for the input
3028 * from an I/O handler
3029 *
3030 * Returns the new parser input or NULL
3031 */
3032 xmlParserInputBufferPtr
xmlParserInputBufferCreateIO(xmlInputReadCallback ioread,xmlInputCloseCallback ioclose,void * ioctx,xmlCharEncoding enc)3033 xmlParserInputBufferCreateIO(xmlInputReadCallback ioread,
3034 xmlInputCloseCallback ioclose, void *ioctx, xmlCharEncoding enc) {
3035 xmlParserInputBufferPtr ret;
3036
3037 if (ioread == NULL) return(NULL);
3038
3039 ret = xmlAllocParserInputBuffer(enc);
3040 if (ret != NULL) {
3041 ret->context = (void *) ioctx;
3042 ret->readcallback = ioread;
3043 ret->closecallback = ioclose;
3044 }
3045
3046 return(ret);
3047 }
3048
3049 #ifdef LIBXML_OUTPUT_ENABLED
3050 /**
3051 * xmlOutputBufferCreateIO:
3052 * @iowrite: an I/O write function
3053 * @ioclose: an I/O close function
3054 * @ioctx: an I/O handler
3055 * @encoder: the charset encoding if known
3056 *
3057 * Create a buffered output for the progressive saving
3058 * to an I/O handler
3059 *
3060 * Returns the new parser output or NULL
3061 */
3062 xmlOutputBufferPtr
xmlOutputBufferCreateIO(xmlOutputWriteCallback iowrite,xmlOutputCloseCallback ioclose,void * ioctx,xmlCharEncodingHandlerPtr encoder)3063 xmlOutputBufferCreateIO(xmlOutputWriteCallback iowrite,
3064 xmlOutputCloseCallback ioclose, void *ioctx,
3065 xmlCharEncodingHandlerPtr encoder) {
3066 xmlOutputBufferPtr ret;
3067
3068 if (iowrite == NULL) return(NULL);
3069
3070 ret = xmlAllocOutputBufferInternal(encoder);
3071 if (ret != NULL) {
3072 ret->context = (void *) ioctx;
3073 ret->writecallback = iowrite;
3074 ret->closecallback = ioclose;
3075 }
3076
3077 return(ret);
3078 }
3079 #endif /* LIBXML_OUTPUT_ENABLED */
3080
3081 /**
3082 * xmlParserInputBufferCreateFilenameDefault:
3083 * @func: function pointer to the new ParserInputBufferCreateFilenameFunc
3084 *
3085 * Registers a callback for URI input file handling
3086 *
3087 * Returns the old value of the registration function
3088 */
3089 xmlParserInputBufferCreateFilenameFunc
xmlParserInputBufferCreateFilenameDefault(xmlParserInputBufferCreateFilenameFunc func)3090 xmlParserInputBufferCreateFilenameDefault(xmlParserInputBufferCreateFilenameFunc func)
3091 {
3092 xmlParserInputBufferCreateFilenameFunc old = xmlParserInputBufferCreateFilenameValue;
3093 if (old == NULL) {
3094 old = __xmlParserInputBufferCreateFilename;
3095 }
3096
3097 xmlParserInputBufferCreateFilenameValue = func;
3098 return(old);
3099 }
3100
3101 /**
3102 * xmlOutputBufferCreateFilenameDefault:
3103 * @func: function pointer to the new OutputBufferCreateFilenameFunc
3104 *
3105 * Registers a callback for URI output file handling
3106 *
3107 * Returns the old value of the registration function
3108 */
3109 xmlOutputBufferCreateFilenameFunc
xmlOutputBufferCreateFilenameDefault(xmlOutputBufferCreateFilenameFunc func)3110 xmlOutputBufferCreateFilenameDefault(xmlOutputBufferCreateFilenameFunc func)
3111 {
3112 xmlOutputBufferCreateFilenameFunc old = xmlOutputBufferCreateFilenameValue;
3113 #ifdef LIBXML_OUTPUT_ENABLED
3114 if (old == NULL) {
3115 old = __xmlOutputBufferCreateFilename;
3116 }
3117 #endif
3118 xmlOutputBufferCreateFilenameValue = func;
3119 return(old);
3120 }
3121
3122 /**
3123 * xmlParserInputBufferPush:
3124 * @in: a buffered parser input
3125 * @len: the size in bytes of the array.
3126 * @buf: an char array
3127 *
3128 * Push the content of the arry in the input buffer
3129 * This routine handle the I18N transcoding to internal UTF-8
3130 * This is used when operating the parser in progressive (push) mode.
3131 *
3132 * Returns the number of chars read and stored in the buffer, or -1
3133 * in case of error.
3134 */
3135 int
xmlParserInputBufferPush(xmlParserInputBufferPtr in,int len,const char * buf)3136 xmlParserInputBufferPush(xmlParserInputBufferPtr in,
3137 int len, const char *buf) {
3138 int nbchars = 0;
3139 int ret;
3140
3141 if (len < 0) return(0);
3142 if ((in == NULL) || (in->error)) return(-1);
3143 if (in->encoder != NULL) {
3144 unsigned int use;
3145
3146 /*
3147 * Store the data in the incoming raw buffer
3148 */
3149 if (in->raw == NULL) {
3150 in->raw = xmlBufCreate();
3151 }
3152 ret = xmlBufAdd(in->raw, (const xmlChar *) buf, len);
3153 if (ret != 0)
3154 return(-1);
3155
3156 /*
3157 * convert as much as possible to the parser reading buffer.
3158 */
3159 use = xmlBufUse(in->raw);
3160 nbchars = xmlCharEncInput(in, 1);
3161 if (nbchars < 0) {
3162 xmlIOErr(XML_IO_ENCODER, NULL);
3163 in->error = XML_IO_ENCODER;
3164 return(-1);
3165 }
3166 in->rawconsumed += (use - xmlBufUse(in->raw));
3167 } else {
3168 nbchars = len;
3169 ret = xmlBufAdd(in->buffer, (xmlChar *) buf, nbchars);
3170 if (ret != 0)
3171 return(-1);
3172 }
3173 #ifdef DEBUG_INPUT
3174 xmlGenericError(xmlGenericErrorContext,
3175 "I/O: pushed %d chars, buffer %d/%d\n",
3176 nbchars, xmlBufUse(in->buffer), xmlBufLength(in->buffer));
3177 #endif
3178 return(nbchars);
3179 }
3180
3181 /**
3182 * endOfInput:
3183 *
3184 * When reading from an Input channel indicated end of file or error
3185 * don't reread from it again.
3186 */
3187 static int
endOfInput(void * context ATTRIBUTE_UNUSED,char * buffer ATTRIBUTE_UNUSED,int len ATTRIBUTE_UNUSED)3188 endOfInput (void * context ATTRIBUTE_UNUSED,
3189 char * buffer ATTRIBUTE_UNUSED,
3190 int len ATTRIBUTE_UNUSED) {
3191 return(0);
3192 }
3193
3194 /**
3195 * xmlParserInputBufferGrow:
3196 * @in: a buffered parser input
3197 * @len: indicative value of the amount of chars to read
3198 *
3199 * Grow up the content of the input buffer, the old data are preserved
3200 * This routine handle the I18N transcoding to internal UTF-8
3201 * This routine is used when operating the parser in normal (pull) mode
3202 *
3203 * TODO: one should be able to remove one extra copy by copying directly
3204 * onto in->buffer or in->raw
3205 *
3206 * Returns the number of chars read and stored in the buffer, or -1
3207 * in case of error.
3208 */
3209 int
xmlParserInputBufferGrow(xmlParserInputBufferPtr in,int len)3210 xmlParserInputBufferGrow(xmlParserInputBufferPtr in, int len) {
3211 char *buffer = NULL;
3212 int res = 0;
3213 int nbchars = 0;
3214
3215 if ((in == NULL) || (in->error)) return(-1);
3216 if ((len <= MINLEN) && (len != 4))
3217 len = MINLEN;
3218
3219 if (xmlBufAvail(in->buffer) <= 0) {
3220 xmlIOErr(XML_IO_BUFFER_FULL, NULL);
3221 in->error = XML_IO_BUFFER_FULL;
3222 return(-1);
3223 }
3224
3225 if (xmlBufGrow(in->buffer, len + 1) < 0) {
3226 xmlIOErrMemory("growing input buffer");
3227 in->error = XML_ERR_NO_MEMORY;
3228 return(-1);
3229 }
3230 buffer = (char *)xmlBufEnd(in->buffer);
3231
3232 /*
3233 * Call the read method for this I/O type.
3234 */
3235 if (in->readcallback != NULL) {
3236 res = in->readcallback(in->context, &buffer[0], len);
3237 if (res <= 0)
3238 in->readcallback = endOfInput;
3239 } else {
3240 xmlIOErr(XML_IO_NO_INPUT, NULL);
3241 in->error = XML_IO_NO_INPUT;
3242 return(-1);
3243 }
3244 if (res < 0) {
3245 return(-1);
3246 }
3247
3248 /*
3249 * try to establish compressed status of input if not done already
3250 */
3251 if (in->compressed == -1) {
3252 #ifdef LIBXML_LZMA_ENABLED
3253 if (in->readcallback == xmlXzfileRead)
3254 in->compressed = __libxml2_xzcompressed(in->context);
3255 #endif
3256 }
3257
3258 len = res;
3259 if (in->encoder != NULL) {
3260 unsigned int use;
3261
3262 /*
3263 * Store the data in the incoming raw buffer
3264 */
3265 if (in->raw == NULL) {
3266 in->raw = xmlBufCreate();
3267 }
3268 res = xmlBufAdd(in->raw, (const xmlChar *) buffer, len);
3269 if (res != 0)
3270 return(-1);
3271
3272 /*
3273 * convert as much as possible to the parser reading buffer.
3274 */
3275 use = xmlBufUse(in->raw);
3276 nbchars = xmlCharEncInput(in, 1);
3277 if (nbchars < 0) {
3278 xmlIOErr(XML_IO_ENCODER, NULL);
3279 in->error = XML_IO_ENCODER;
3280 return(-1);
3281 }
3282 in->rawconsumed += (use - xmlBufUse(in->raw));
3283 } else {
3284 nbchars = len;
3285 xmlBufAddLen(in->buffer, nbchars);
3286 }
3287 #ifdef DEBUG_INPUT
3288 xmlGenericError(xmlGenericErrorContext,
3289 "I/O: read %d chars, buffer %d\n",
3290 nbchars, xmlBufUse(in->buffer));
3291 #endif
3292 return(nbchars);
3293 }
3294
3295 /**
3296 * xmlParserInputBufferRead:
3297 * @in: a buffered parser input
3298 * @len: indicative value of the amount of chars to read
3299 *
3300 * Refresh the content of the input buffer, the old data are considered
3301 * consumed
3302 * This routine handle the I18N transcoding to internal UTF-8
3303 *
3304 * Returns the number of chars read and stored in the buffer, or -1
3305 * in case of error.
3306 */
3307 int
xmlParserInputBufferRead(xmlParserInputBufferPtr in,int len)3308 xmlParserInputBufferRead(xmlParserInputBufferPtr in, int len) {
3309 if ((in == NULL) || (in->error)) return(-1);
3310 if (in->readcallback != NULL)
3311 return(xmlParserInputBufferGrow(in, len));
3312 else if (xmlBufGetAllocationScheme(in->buffer) == XML_BUFFER_ALLOC_IMMUTABLE)
3313 return(0);
3314 else
3315 return(-1);
3316 }
3317
3318 #ifdef LIBXML_OUTPUT_ENABLED
3319 /**
3320 * xmlOutputBufferWrite:
3321 * @out: a buffered parser output
3322 * @len: the size in bytes of the array.
3323 * @buf: an char array
3324 *
3325 * Write the content of the array in the output I/O buffer
3326 * This routine handle the I18N transcoding from internal UTF-8
3327 * The buffer is lossless, i.e. will store in case of partial
3328 * or delayed writes.
3329 *
3330 * Returns the number of chars immediately written, or -1
3331 * in case of error.
3332 */
3333 int
xmlOutputBufferWrite(xmlOutputBufferPtr out,int len,const char * buf)3334 xmlOutputBufferWrite(xmlOutputBufferPtr out, int len, const char *buf) {
3335 int nbchars = 0; /* number of chars to output to I/O */
3336 int ret; /* return from function call */
3337 int written = 0; /* number of char written to I/O so far */
3338 int chunk; /* number of byte curreent processed from buf */
3339
3340 if ((out == NULL) || (out->error)) return(-1);
3341 if (len < 0) return(0);
3342 if (out->error) return(-1);
3343
3344 do {
3345 chunk = len;
3346 if (chunk > 4 * MINLEN)
3347 chunk = 4 * MINLEN;
3348
3349 /*
3350 * first handle encoding stuff.
3351 */
3352 if (out->encoder != NULL) {
3353 /*
3354 * Store the data in the incoming raw buffer
3355 */
3356 if (out->conv == NULL) {
3357 out->conv = xmlBufCreate();
3358 }
3359 ret = xmlBufAdd(out->buffer, (const xmlChar *) buf, chunk);
3360 if (ret != 0)
3361 return(-1);
3362
3363 if ((xmlBufUse(out->buffer) < MINLEN) && (chunk == len))
3364 goto done;
3365
3366 /*
3367 * convert as much as possible to the parser reading buffer.
3368 */
3369 ret = xmlCharEncOutput(out, 0);
3370 if ((ret < 0) && (ret != -3)) {
3371 xmlIOErr(XML_IO_ENCODER, NULL);
3372 out->error = XML_IO_ENCODER;
3373 return(-1);
3374 }
3375 nbchars = xmlBufUse(out->conv);
3376 } else {
3377 ret = xmlBufAdd(out->buffer, (const xmlChar *) buf, chunk);
3378 if (ret != 0)
3379 return(-1);
3380 nbchars = xmlBufUse(out->buffer);
3381 }
3382 buf += chunk;
3383 len -= chunk;
3384
3385 if ((nbchars < MINLEN) && (len <= 0))
3386 goto done;
3387
3388 if (out->writecallback) {
3389 /*
3390 * second write the stuff to the I/O channel
3391 */
3392 if (out->encoder != NULL) {
3393 ret = out->writecallback(out->context,
3394 (const char *)xmlBufContent(out->conv), nbchars);
3395 if (ret >= 0)
3396 xmlBufShrink(out->conv, ret);
3397 } else {
3398 ret = out->writecallback(out->context,
3399 (const char *)xmlBufContent(out->buffer), nbchars);
3400 if (ret >= 0)
3401 xmlBufShrink(out->buffer, ret);
3402 }
3403 if (ret < 0) {
3404 xmlIOErr(XML_IO_WRITE, NULL);
3405 out->error = XML_IO_WRITE;
3406 return(ret);
3407 }
3408 out->written += ret;
3409 }
3410 written += nbchars;
3411 } while (len > 0);
3412
3413 done:
3414 #ifdef DEBUG_INPUT
3415 xmlGenericError(xmlGenericErrorContext,
3416 "I/O: wrote %d chars\n", written);
3417 #endif
3418 return(written);
3419 }
3420
3421 /**
3422 * xmlEscapeContent:
3423 * @out: a pointer to an array of bytes to store the result
3424 * @outlen: the length of @out
3425 * @in: a pointer to an array of unescaped UTF-8 bytes
3426 * @inlen: the length of @in
3427 *
3428 * Take a block of UTF-8 chars in and escape them.
3429 * Returns 0 if success, or -1 otherwise
3430 * The value of @inlen after return is the number of octets consumed
3431 * if the return value is positive, else unpredictable.
3432 * The value of @outlen after return is the number of octets consumed.
3433 */
3434 static int
xmlEscapeContent(unsigned char * out,int * outlen,const xmlChar * in,int * inlen)3435 xmlEscapeContent(unsigned char* out, int *outlen,
3436 const xmlChar* in, int *inlen) {
3437 unsigned char* outstart = out;
3438 const unsigned char* base = in;
3439 unsigned char* outend = out + *outlen;
3440 const unsigned char* inend;
3441
3442 inend = in + (*inlen);
3443
3444 while ((in < inend) && (out < outend)) {
3445 if (*in == '<') {
3446 if (outend - out < 4) break;
3447 *out++ = '&';
3448 *out++ = 'l';
3449 *out++ = 't';
3450 *out++ = ';';
3451 } else if (*in == '>') {
3452 if (outend - out < 4) break;
3453 *out++ = '&';
3454 *out++ = 'g';
3455 *out++ = 't';
3456 *out++ = ';';
3457 } else if (*in == '&') {
3458 if (outend - out < 5) break;
3459 *out++ = '&';
3460 *out++ = 'a';
3461 *out++ = 'm';
3462 *out++ = 'p';
3463 *out++ = ';';
3464 } else if (*in == '\r') {
3465 if (outend - out < 5) break;
3466 *out++ = '&';
3467 *out++ = '#';
3468 *out++ = '1';
3469 *out++ = '3';
3470 *out++ = ';';
3471 } else {
3472 *out++ = (unsigned char) *in;
3473 }
3474 ++in;
3475 }
3476 *outlen = out - outstart;
3477 *inlen = in - base;
3478 return(0);
3479 }
3480
3481 /**
3482 * xmlOutputBufferWriteEscape:
3483 * @out: a buffered parser output
3484 * @str: a zero terminated UTF-8 string
3485 * @escaping: an optional escaping function (or NULL)
3486 *
3487 * Write the content of the string in the output I/O buffer
3488 * This routine escapes the caracters and then handle the I18N
3489 * transcoding from internal UTF-8
3490 * The buffer is lossless, i.e. will store in case of partial
3491 * or delayed writes.
3492 *
3493 * Returns the number of chars immediately written, or -1
3494 * in case of error.
3495 */
3496 int
xmlOutputBufferWriteEscape(xmlOutputBufferPtr out,const xmlChar * str,xmlCharEncodingOutputFunc escaping)3497 xmlOutputBufferWriteEscape(xmlOutputBufferPtr out, const xmlChar *str,
3498 xmlCharEncodingOutputFunc escaping) {
3499 int nbchars = 0; /* number of chars to output to I/O */
3500 int ret; /* return from function call */
3501 int written = 0; /* number of char written to I/O so far */
3502 int oldwritten=0;/* loop guard */
3503 int chunk; /* number of byte currently processed from str */
3504 int len; /* number of bytes in str */
3505 int cons; /* byte from str consumed */
3506
3507 if ((out == NULL) || (out->error) || (str == NULL) ||
3508 (out->buffer == NULL) ||
3509 (xmlBufGetAllocationScheme(out->buffer) == XML_BUFFER_ALLOC_IMMUTABLE))
3510 return(-1);
3511 len = strlen((const char *)str);
3512 if (len < 0) return(0);
3513 if (out->error) return(-1);
3514 if (escaping == NULL) escaping = xmlEscapeContent;
3515
3516 do {
3517 oldwritten = written;
3518
3519 /*
3520 * how many bytes to consume and how many bytes to store.
3521 */
3522 cons = len;
3523 chunk = xmlBufAvail(out->buffer) - 1;
3524
3525 /*
3526 * make sure we have enough room to save first, if this is
3527 * not the case force a flush, but make sure we stay in the loop
3528 */
3529 if (chunk < 40) {
3530 if (xmlBufGrow(out->buffer, 100) < 0)
3531 return(-1);
3532 oldwritten = -1;
3533 continue;
3534 }
3535
3536 /*
3537 * first handle encoding stuff.
3538 */
3539 if (out->encoder != NULL) {
3540 /*
3541 * Store the data in the incoming raw buffer
3542 */
3543 if (out->conv == NULL) {
3544 out->conv = xmlBufCreate();
3545 }
3546 ret = escaping(xmlBufEnd(out->buffer) ,
3547 &chunk, str, &cons);
3548 if ((ret < 0) || (chunk == 0)) /* chunk==0 => nothing done */
3549 return(-1);
3550 xmlBufAddLen(out->buffer, chunk);
3551
3552 if ((xmlBufUse(out->buffer) < MINLEN) && (cons == len))
3553 goto done;
3554
3555 /*
3556 * convert as much as possible to the output buffer.
3557 */
3558 ret = xmlCharEncOutput(out, 0);
3559 if ((ret < 0) && (ret != -3)) {
3560 xmlIOErr(XML_IO_ENCODER, NULL);
3561 out->error = XML_IO_ENCODER;
3562 return(-1);
3563 }
3564 nbchars = xmlBufUse(out->conv);
3565 } else {
3566 ret = escaping(xmlBufEnd(out->buffer), &chunk, str, &cons);
3567 if ((ret < 0) || (chunk == 0)) /* chunk==0 => nothing done */
3568 return(-1);
3569 xmlBufAddLen(out->buffer, chunk);
3570 nbchars = xmlBufUse(out->buffer);
3571 }
3572 str += cons;
3573 len -= cons;
3574
3575 if ((nbchars < MINLEN) && (len <= 0))
3576 goto done;
3577
3578 if (out->writecallback) {
3579 /*
3580 * second write the stuff to the I/O channel
3581 */
3582 if (out->encoder != NULL) {
3583 ret = out->writecallback(out->context,
3584 (const char *)xmlBufContent(out->conv), nbchars);
3585 if (ret >= 0)
3586 xmlBufShrink(out->conv, ret);
3587 } else {
3588 ret = out->writecallback(out->context,
3589 (const char *)xmlBufContent(out->buffer), nbchars);
3590 if (ret >= 0)
3591 xmlBufShrink(out->buffer, ret);
3592 }
3593 if (ret < 0) {
3594 xmlIOErr(XML_IO_WRITE, NULL);
3595 out->error = XML_IO_WRITE;
3596 return(ret);
3597 }
3598 out->written += ret;
3599 } else if (xmlBufAvail(out->buffer) < MINLEN) {
3600 xmlBufGrow(out->buffer, MINLEN);
3601 }
3602 written += nbchars;
3603 } while ((len > 0) && (oldwritten != written));
3604
3605 done:
3606 #ifdef DEBUG_INPUT
3607 xmlGenericError(xmlGenericErrorContext,
3608 "I/O: wrote %d chars\n", written);
3609 #endif
3610 return(written);
3611 }
3612
3613 /**
3614 * xmlOutputBufferWriteString:
3615 * @out: a buffered parser output
3616 * @str: a zero terminated C string
3617 *
3618 * Write the content of the string in the output I/O buffer
3619 * This routine handle the I18N transcoding from internal UTF-8
3620 * The buffer is lossless, i.e. will store in case of partial
3621 * or delayed writes.
3622 *
3623 * Returns the number of chars immediately written, or -1
3624 * in case of error.
3625 */
3626 int
xmlOutputBufferWriteString(xmlOutputBufferPtr out,const char * str)3627 xmlOutputBufferWriteString(xmlOutputBufferPtr out, const char *str) {
3628 int len;
3629
3630 if ((out == NULL) || (out->error)) return(-1);
3631 if (str == NULL)
3632 return(-1);
3633 len = strlen(str);
3634
3635 if (len > 0)
3636 return(xmlOutputBufferWrite(out, len, str));
3637 return(len);
3638 }
3639
3640 /**
3641 * xmlOutputBufferFlush:
3642 * @out: a buffered output
3643 *
3644 * flushes the output I/O channel
3645 *
3646 * Returns the number of byte written or -1 in case of error.
3647 */
3648 int
xmlOutputBufferFlush(xmlOutputBufferPtr out)3649 xmlOutputBufferFlush(xmlOutputBufferPtr out) {
3650 int nbchars = 0, ret = 0;
3651
3652 if ((out == NULL) || (out->error)) return(-1);
3653 /*
3654 * first handle encoding stuff.
3655 */
3656 if ((out->conv != NULL) && (out->encoder != NULL)) {
3657 /*
3658 * convert as much as possible to the parser output buffer.
3659 */
3660 do {
3661 nbchars = xmlCharEncOutput(out, 0);
3662 if (nbchars < 0) {
3663 xmlIOErr(XML_IO_ENCODER, NULL);
3664 out->error = XML_IO_ENCODER;
3665 return(-1);
3666 }
3667 } while (nbchars);
3668 }
3669
3670 /*
3671 * second flush the stuff to the I/O channel
3672 */
3673 if ((out->conv != NULL) && (out->encoder != NULL) &&
3674 (out->writecallback != NULL)) {
3675 ret = out->writecallback(out->context,
3676 (const char *)xmlBufContent(out->conv),
3677 xmlBufUse(out->conv));
3678 if (ret >= 0)
3679 xmlBufShrink(out->conv, ret);
3680 } else if (out->writecallback != NULL) {
3681 ret = out->writecallback(out->context,
3682 (const char *)xmlBufContent(out->buffer),
3683 xmlBufUse(out->buffer));
3684 if (ret >= 0)
3685 xmlBufShrink(out->buffer, ret);
3686 }
3687 if (ret < 0) {
3688 xmlIOErr(XML_IO_FLUSH, NULL);
3689 out->error = XML_IO_FLUSH;
3690 return(ret);
3691 }
3692 out->written += ret;
3693
3694 #ifdef DEBUG_INPUT
3695 xmlGenericError(xmlGenericErrorContext,
3696 "I/O: flushed %d chars\n", ret);
3697 #endif
3698 return(ret);
3699 }
3700 #endif /* LIBXML_OUTPUT_ENABLED */
3701
3702 /**
3703 * xmlParserGetDirectory:
3704 * @filename: the path to a file
3705 *
3706 * lookup the directory for that file
3707 *
3708 * Returns a new allocated string containing the directory, or NULL.
3709 */
3710 char *
xmlParserGetDirectory(const char * filename)3711 xmlParserGetDirectory(const char *filename) {
3712 char *ret = NULL;
3713 char dir[1024];
3714 char *cur;
3715
3716 #ifdef _WIN32_WCE /* easy way by now ... wince does not have dirs! */
3717 return NULL;
3718 #endif
3719
3720 if (xmlInputCallbackInitialized == 0)
3721 xmlRegisterDefaultInputCallbacks();
3722
3723 if (filename == NULL) return(NULL);
3724
3725 #if defined(_WIN32) && !defined(__CYGWIN__)
3726 # define IS_XMLPGD_SEP(ch) ((ch=='/')||(ch=='\\'))
3727 #else
3728 # define IS_XMLPGD_SEP(ch) (ch=='/')
3729 #endif
3730
3731 strncpy(dir, filename, 1023);
3732 dir[1023] = 0;
3733 cur = &dir[strlen(dir)];
3734 while (cur > dir) {
3735 if (IS_XMLPGD_SEP(*cur)) break;
3736 cur --;
3737 }
3738 if (IS_XMLPGD_SEP(*cur)) {
3739 if (cur == dir) dir[1] = 0;
3740 else *cur = 0;
3741 ret = xmlMemStrdup(dir);
3742 } else {
3743 if (getcwd(dir, 1024) != NULL) {
3744 dir[1023] = 0;
3745 ret = xmlMemStrdup(dir);
3746 }
3747 }
3748 return(ret);
3749 #undef IS_XMLPGD_SEP
3750 }
3751
3752 /****************************************************************
3753 * *
3754 * External entities loading *
3755 * *
3756 ****************************************************************/
3757
3758 /**
3759 * xmlCheckHTTPInput:
3760 * @ctxt: an XML parser context
3761 * @ret: an XML parser input
3762 *
3763 * Check an input in case it was created from an HTTP stream, in that
3764 * case it will handle encoding and update of the base URL in case of
3765 * redirection. It also checks for HTTP errors in which case the input
3766 * is cleanly freed up and an appropriate error is raised in context
3767 *
3768 * Returns the input or NULL in case of HTTP error.
3769 */
3770 xmlParserInputPtr
xmlCheckHTTPInput(xmlParserCtxtPtr ctxt,xmlParserInputPtr ret)3771 xmlCheckHTTPInput(xmlParserCtxtPtr ctxt, xmlParserInputPtr ret) {
3772 #ifdef LIBXML_HTTP_ENABLED
3773 if ((ret != NULL) && (ret->buf != NULL) &&
3774 (ret->buf->readcallback == xmlIOHTTPRead) &&
3775 (ret->buf->context != NULL)) {
3776 const char *encoding;
3777 const char *redir;
3778 const char *mime;
3779 int code;
3780
3781 code = xmlNanoHTTPReturnCode(ret->buf->context);
3782 if (code >= 400) {
3783 /* fatal error */
3784 if (ret->filename != NULL)
3785 __xmlLoaderErr(ctxt, "failed to load HTTP resource \"%s\"\n",
3786 (const char *) ret->filename);
3787 else
3788 __xmlLoaderErr(ctxt, "failed to load HTTP resource\n", NULL);
3789 xmlFreeInputStream(ret);
3790 ret = NULL;
3791 } else {
3792
3793 mime = xmlNanoHTTPMimeType(ret->buf->context);
3794 if ((xmlStrstr(BAD_CAST mime, BAD_CAST "/xml")) ||
3795 (xmlStrstr(BAD_CAST mime, BAD_CAST "+xml"))) {
3796 encoding = xmlNanoHTTPEncoding(ret->buf->context);
3797 if (encoding != NULL) {
3798 xmlCharEncodingHandlerPtr handler;
3799
3800 handler = xmlFindCharEncodingHandler(encoding);
3801 if (handler != NULL) {
3802 xmlSwitchInputEncoding(ctxt, ret, handler);
3803 } else {
3804 __xmlErrEncoding(ctxt, XML_ERR_UNKNOWN_ENCODING,
3805 "Unknown encoding %s",
3806 BAD_CAST encoding, NULL);
3807 }
3808 if (ret->encoding == NULL)
3809 ret->encoding = xmlStrdup(BAD_CAST encoding);
3810 }
3811 #if 0
3812 } else if (xmlStrstr(BAD_CAST mime, BAD_CAST "html")) {
3813 #endif
3814 }
3815 redir = xmlNanoHTTPRedir(ret->buf->context);
3816 if (redir != NULL) {
3817 if (ret->filename != NULL)
3818 xmlFree((xmlChar *) ret->filename);
3819 if (ret->directory != NULL) {
3820 xmlFree((xmlChar *) ret->directory);
3821 ret->directory = NULL;
3822 }
3823 ret->filename =
3824 (char *) xmlStrdup((const xmlChar *) redir);
3825 }
3826 }
3827 }
3828 #endif
3829 return(ret);
3830 }
3831
xmlNoNetExists(const char * URL)3832 static int xmlNoNetExists(const char *URL) {
3833 const char *path;
3834
3835 if (URL == NULL)
3836 return(0);
3837
3838 if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file://localhost/", 17))
3839 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
3840 path = &URL[17];
3841 #else
3842 path = &URL[16];
3843 #endif
3844 else if (!xmlStrncasecmp(BAD_CAST URL, BAD_CAST "file:///", 8)) {
3845 #if defined (_WIN32) || defined (__DJGPP__) && !defined(__CYGWIN__)
3846 path = &URL[8];
3847 #else
3848 path = &URL[7];
3849 #endif
3850 } else
3851 path = URL;
3852
3853 return xmlCheckFilename(path);
3854 }
3855
3856 #ifdef LIBXML_CATALOG_ENABLED
3857
3858 /**
3859 * xmlResolveResourceFromCatalog:
3860 * @URL: the URL for the entity to load
3861 * @ID: the System ID for the entity to load
3862 * @ctxt: the context in which the entity is called or NULL
3863 *
3864 * Resolves the URL and ID against the appropriate catalog.
3865 * This function is used by xmlDefaultExternalEntityLoader and
3866 * xmlNoNetExternalEntityLoader.
3867 *
3868 * Returns a new allocated URL, or NULL.
3869 */
3870 static xmlChar *
xmlResolveResourceFromCatalog(const char * URL,const char * ID,xmlParserCtxtPtr ctxt)3871 xmlResolveResourceFromCatalog(const char *URL, const char *ID,
3872 xmlParserCtxtPtr ctxt) {
3873 xmlChar *resource = NULL;
3874 xmlCatalogAllow pref;
3875
3876 /*
3877 * If the resource doesn't exists as a file,
3878 * try to load it from the resource pointed in the catalogs
3879 */
3880 pref = xmlCatalogGetDefaults();
3881
3882 if ((pref != XML_CATA_ALLOW_NONE) && (!xmlNoNetExists(URL))) {
3883 /*
3884 * Do a local lookup
3885 */
3886 if ((ctxt != NULL) && (ctxt->catalogs != NULL) &&
3887 ((pref == XML_CATA_ALLOW_ALL) ||
3888 (pref == XML_CATA_ALLOW_DOCUMENT))) {
3889 resource = xmlCatalogLocalResolve(ctxt->catalogs,
3890 (const xmlChar *)ID,
3891 (const xmlChar *)URL);
3892 }
3893 /*
3894 * Try a global lookup
3895 */
3896 if ((resource == NULL) &&
3897 ((pref == XML_CATA_ALLOW_ALL) ||
3898 (pref == XML_CATA_ALLOW_GLOBAL))) {
3899 resource = xmlCatalogResolve((const xmlChar *)ID,
3900 (const xmlChar *)URL);
3901 }
3902 if ((resource == NULL) && (URL != NULL))
3903 resource = xmlStrdup((const xmlChar *) URL);
3904
3905 /*
3906 * TODO: do an URI lookup on the reference
3907 */
3908 if ((resource != NULL) && (!xmlNoNetExists((const char *)resource))) {
3909 xmlChar *tmp = NULL;
3910
3911 if ((ctxt != NULL) && (ctxt->catalogs != NULL) &&
3912 ((pref == XML_CATA_ALLOW_ALL) ||
3913 (pref == XML_CATA_ALLOW_DOCUMENT))) {
3914 tmp = xmlCatalogLocalResolveURI(ctxt->catalogs, resource);
3915 }
3916 if ((tmp == NULL) &&
3917 ((pref == XML_CATA_ALLOW_ALL) ||
3918 (pref == XML_CATA_ALLOW_GLOBAL))) {
3919 tmp = xmlCatalogResolveURI(resource);
3920 }
3921
3922 if (tmp != NULL) {
3923 xmlFree(resource);
3924 resource = tmp;
3925 }
3926 }
3927 }
3928
3929 return resource;
3930 }
3931
3932 #endif
3933
3934 /**
3935 * xmlDefaultExternalEntityLoader:
3936 * @URL: the URL for the entity to load
3937 * @ID: the System ID for the entity to load
3938 * @ctxt: the context in which the entity is called or NULL
3939 *
3940 * By default we don't load external entitites, yet.
3941 *
3942 * Returns a new allocated xmlParserInputPtr, or NULL.
3943 */
3944 static xmlParserInputPtr
xmlDefaultExternalEntityLoader(const char * URL,const char * ID,xmlParserCtxtPtr ctxt)3945 xmlDefaultExternalEntityLoader(const char *URL, const char *ID,
3946 xmlParserCtxtPtr ctxt)
3947 {
3948 xmlParserInputPtr ret = NULL;
3949 xmlChar *resource = NULL;
3950
3951 #ifdef DEBUG_EXTERNAL_ENTITIES
3952 xmlGenericError(xmlGenericErrorContext,
3953 "xmlDefaultExternalEntityLoader(%s, xxx)\n", URL);
3954 #endif
3955 if ((ctxt != NULL) && (ctxt->options & XML_PARSE_NONET)) {
3956 int options = ctxt->options;
3957
3958 ctxt->options -= XML_PARSE_NONET;
3959 ret = xmlNoNetExternalEntityLoader(URL, ID, ctxt);
3960 ctxt->options = options;
3961 return(ret);
3962 }
3963 #ifdef LIBXML_CATALOG_ENABLED
3964 resource = xmlResolveResourceFromCatalog(URL, ID, ctxt);
3965 #endif
3966
3967 if (resource == NULL)
3968 resource = (xmlChar *) URL;
3969
3970 if (resource == NULL) {
3971 if (ID == NULL)
3972 ID = "NULL";
3973 __xmlLoaderErr(ctxt, "failed to load external entity \"%s\"\n", ID);
3974 return (NULL);
3975 }
3976 ret = xmlNewInputFromFile(ctxt, (const char *) resource);
3977 if ((resource != NULL) && (resource != (xmlChar *) URL))
3978 xmlFree(resource);
3979 return (ret);
3980 }
3981
3982 static xmlExternalEntityLoader xmlCurrentExternalEntityLoader =
3983 xmlDefaultExternalEntityLoader;
3984
3985 /**
3986 * xmlSetExternalEntityLoader:
3987 * @f: the new entity resolver function
3988 *
3989 * Changes the defaultexternal entity resolver function for the application
3990 */
3991 void
xmlSetExternalEntityLoader(xmlExternalEntityLoader f)3992 xmlSetExternalEntityLoader(xmlExternalEntityLoader f) {
3993 xmlCurrentExternalEntityLoader = f;
3994 }
3995
3996 /**
3997 * xmlGetExternalEntityLoader:
3998 *
3999 * Get the default external entity resolver function for the application
4000 *
4001 * Returns the xmlExternalEntityLoader function pointer
4002 */
4003 xmlExternalEntityLoader
xmlGetExternalEntityLoader(void)4004 xmlGetExternalEntityLoader(void) {
4005 return(xmlCurrentExternalEntityLoader);
4006 }
4007
4008 /**
4009 * xmlLoadExternalEntity:
4010 * @URL: the URL for the entity to load
4011 * @ID: the Public ID for the entity to load
4012 * @ctxt: the context in which the entity is called or NULL
4013 *
4014 * Load an external entity, note that the use of this function for
4015 * unparsed entities may generate problems
4016 *
4017 * Returns the xmlParserInputPtr or NULL
4018 */
4019 xmlParserInputPtr
xmlLoadExternalEntity(const char * URL,const char * ID,xmlParserCtxtPtr ctxt)4020 xmlLoadExternalEntity(const char *URL, const char *ID,
4021 xmlParserCtxtPtr ctxt) {
4022 if ((URL != NULL) && (xmlNoNetExists(URL) == 0)) {
4023 char *canonicFilename;
4024 xmlParserInputPtr ret;
4025
4026 canonicFilename = (char *) xmlCanonicPath((const xmlChar *) URL);
4027 if (canonicFilename == NULL) {
4028 xmlIOErrMemory("building canonical path\n");
4029 return(NULL);
4030 }
4031
4032 ret = xmlCurrentExternalEntityLoader(canonicFilename, ID, ctxt);
4033 xmlFree(canonicFilename);
4034 return(ret);
4035 }
4036 return(xmlCurrentExternalEntityLoader(URL, ID, ctxt));
4037 }
4038
4039 /************************************************************************
4040 * *
4041 * Disabling Network access *
4042 * *
4043 ************************************************************************/
4044
4045 /**
4046 * xmlNoNetExternalEntityLoader:
4047 * @URL: the URL for the entity to load
4048 * @ID: the System ID for the entity to load
4049 * @ctxt: the context in which the entity is called or NULL
4050 *
4051 * A specific entity loader disabling network accesses, though still
4052 * allowing local catalog accesses for resolution.
4053 *
4054 * Returns a new allocated xmlParserInputPtr, or NULL.
4055 */
4056 xmlParserInputPtr
xmlNoNetExternalEntityLoader(const char * URL,const char * ID,xmlParserCtxtPtr ctxt)4057 xmlNoNetExternalEntityLoader(const char *URL, const char *ID,
4058 xmlParserCtxtPtr ctxt) {
4059 xmlParserInputPtr input = NULL;
4060 xmlChar *resource = NULL;
4061
4062 #ifdef LIBXML_CATALOG_ENABLED
4063 resource = xmlResolveResourceFromCatalog(URL, ID, ctxt);
4064 #endif
4065
4066 if (resource == NULL)
4067 resource = (xmlChar *) URL;
4068
4069 if (resource != NULL) {
4070 if ((!xmlStrncasecmp(BAD_CAST resource, BAD_CAST "ftp://", 6)) ||
4071 (!xmlStrncasecmp(BAD_CAST resource, BAD_CAST "http://", 7))) {
4072 xmlIOErr(XML_IO_NETWORK_ATTEMPT, (const char *) resource);
4073 if (resource != (xmlChar *) URL)
4074 xmlFree(resource);
4075 return(NULL);
4076 }
4077 }
4078 input = xmlDefaultExternalEntityLoader((const char *) resource, ID, ctxt);
4079 if (resource != (xmlChar *) URL)
4080 xmlFree(resource);
4081 return(input);
4082 }
4083
4084 #define bottom_xmlIO
4085 #include "elfgcchack.h"
4086