1 /*
2 * HTMLtree.c : implementation of access function for an HTML tree.
3 *
4 * See Copyright for the status of this software.
5 *
6 * daniel@veillard.com
7 */
8
9
10 #define IN_LIBXML
11 #include "libxml.h"
12 #ifdef LIBXML_HTML_ENABLED
13
14 #include <string.h> /* for memset() only ! */
15
16 #ifdef HAVE_CTYPE_H
17 #include <ctype.h>
18 #endif
19 #ifdef HAVE_STDLIB_H
20 #include <stdlib.h>
21 #endif
22
23 #include <libxml/xmlmemory.h>
24 #include <libxml/HTMLparser.h>
25 #include <libxml/HTMLtree.h>
26 #include <libxml/entities.h>
27 #include <libxml/valid.h>
28 #include <libxml/xmlerror.h>
29 #include <libxml/parserInternals.h>
30 #include <libxml/globals.h>
31 #include <libxml/uri.h>
32
33 #include "buf.h"
34
35 /************************************************************************
36 * *
37 * Getting/Setting encoding meta tags *
38 * *
39 ************************************************************************/
40
41 /**
42 * htmlGetMetaEncoding:
43 * @doc: the document
44 *
45 * Encoding definition lookup in the Meta tags
46 *
47 * Returns the current encoding as flagged in the HTML source
48 */
49 const xmlChar *
htmlGetMetaEncoding(htmlDocPtr doc)50 htmlGetMetaEncoding(htmlDocPtr doc) {
51 htmlNodePtr cur;
52 const xmlChar *content;
53 const xmlChar *encoding;
54
55 if (doc == NULL)
56 return(NULL);
57 cur = doc->children;
58
59 /*
60 * Search the html
61 */
62 while (cur != NULL) {
63 if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
64 if (xmlStrEqual(cur->name, BAD_CAST"html"))
65 break;
66 if (xmlStrEqual(cur->name, BAD_CAST"head"))
67 goto found_head;
68 if (xmlStrEqual(cur->name, BAD_CAST"meta"))
69 goto found_meta;
70 }
71 cur = cur->next;
72 }
73 if (cur == NULL)
74 return(NULL);
75 cur = cur->children;
76
77 /*
78 * Search the head
79 */
80 while (cur != NULL) {
81 if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
82 if (xmlStrEqual(cur->name, BAD_CAST"head"))
83 break;
84 if (xmlStrEqual(cur->name, BAD_CAST"meta"))
85 goto found_meta;
86 }
87 cur = cur->next;
88 }
89 if (cur == NULL)
90 return(NULL);
91 found_head:
92 cur = cur->children;
93
94 /*
95 * Search the meta elements
96 */
97 found_meta:
98 while (cur != NULL) {
99 if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
100 if (xmlStrEqual(cur->name, BAD_CAST"meta")) {
101 xmlAttrPtr attr = cur->properties;
102 int http;
103 const xmlChar *value;
104
105 content = NULL;
106 http = 0;
107 while (attr != NULL) {
108 if ((attr->children != NULL) &&
109 (attr->children->type == XML_TEXT_NODE) &&
110 (attr->children->next == NULL)) {
111 value = attr->children->content;
112 if ((!xmlStrcasecmp(attr->name, BAD_CAST"http-equiv"))
113 && (!xmlStrcasecmp(value, BAD_CAST"Content-Type")))
114 http = 1;
115 else if ((value != NULL)
116 && (!xmlStrcasecmp(attr->name, BAD_CAST"content")))
117 content = value;
118 if ((http != 0) && (content != NULL))
119 goto found_content;
120 }
121 attr = attr->next;
122 }
123 }
124 }
125 cur = cur->next;
126 }
127 return(NULL);
128
129 found_content:
130 encoding = xmlStrstr(content, BAD_CAST"charset=");
131 if (encoding == NULL)
132 encoding = xmlStrstr(content, BAD_CAST"Charset=");
133 if (encoding == NULL)
134 encoding = xmlStrstr(content, BAD_CAST"CHARSET=");
135 if (encoding != NULL) {
136 encoding += 8;
137 } else {
138 encoding = xmlStrstr(content, BAD_CAST"charset =");
139 if (encoding == NULL)
140 encoding = xmlStrstr(content, BAD_CAST"Charset =");
141 if (encoding == NULL)
142 encoding = xmlStrstr(content, BAD_CAST"CHARSET =");
143 if (encoding != NULL)
144 encoding += 9;
145 }
146 if (encoding != NULL) {
147 while ((*encoding == ' ') || (*encoding == '\t')) encoding++;
148 }
149 return(encoding);
150 }
151
152 /**
153 * htmlSetMetaEncoding:
154 * @doc: the document
155 * @encoding: the encoding string
156 *
157 * Sets the current encoding in the Meta tags
158 * NOTE: this will not change the document content encoding, just
159 * the META flag associated.
160 *
161 * Returns 0 in case of success and -1 in case of error
162 */
163 int
htmlSetMetaEncoding(htmlDocPtr doc,const xmlChar * encoding)164 htmlSetMetaEncoding(htmlDocPtr doc, const xmlChar *encoding) {
165 htmlNodePtr cur, meta = NULL, head = NULL;
166 const xmlChar *content = NULL;
167 char newcontent[100];
168
169 newcontent[0] = 0;
170
171 if (doc == NULL)
172 return(-1);
173
174 /* html isn't a real encoding it's just libxml2 way to get entities */
175 if (!xmlStrcasecmp(encoding, BAD_CAST "html"))
176 return(-1);
177
178 if (encoding != NULL) {
179 snprintf(newcontent, sizeof(newcontent), "text/html; charset=%s",
180 (char *)encoding);
181 newcontent[sizeof(newcontent) - 1] = 0;
182 }
183
184 cur = doc->children;
185
186 /*
187 * Search the html
188 */
189 while (cur != NULL) {
190 if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
191 if (xmlStrcasecmp(cur->name, BAD_CAST"html") == 0)
192 break;
193 if (xmlStrcasecmp(cur->name, BAD_CAST"head") == 0)
194 goto found_head;
195 if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0)
196 goto found_meta;
197 }
198 cur = cur->next;
199 }
200 if (cur == NULL)
201 return(-1);
202 cur = cur->children;
203
204 /*
205 * Search the head
206 */
207 while (cur != NULL) {
208 if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
209 if (xmlStrcasecmp(cur->name, BAD_CAST"head") == 0)
210 break;
211 if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0) {
212 head = cur->parent;
213 goto found_meta;
214 }
215 }
216 cur = cur->next;
217 }
218 if (cur == NULL)
219 return(-1);
220 found_head:
221 head = cur;
222 if (cur->children == NULL)
223 goto create;
224 cur = cur->children;
225
226 found_meta:
227 /*
228 * Search and update all the remaining the meta elements carrying
229 * encoding informations
230 */
231 while (cur != NULL) {
232 if ((cur->type == XML_ELEMENT_NODE) && (cur->name != NULL)) {
233 if (xmlStrcasecmp(cur->name, BAD_CAST"meta") == 0) {
234 xmlAttrPtr attr = cur->properties;
235 int http;
236 const xmlChar *value;
237
238 content = NULL;
239 http = 0;
240 while (attr != NULL) {
241 if ((attr->children != NULL) &&
242 (attr->children->type == XML_TEXT_NODE) &&
243 (attr->children->next == NULL)) {
244 value = attr->children->content;
245 if ((!xmlStrcasecmp(attr->name, BAD_CAST"http-equiv"))
246 && (!xmlStrcasecmp(value, BAD_CAST"Content-Type")))
247 http = 1;
248 else
249 {
250 if ((value != NULL) &&
251 (!xmlStrcasecmp(attr->name, BAD_CAST"content")))
252 content = value;
253 }
254 if ((http != 0) && (content != NULL))
255 break;
256 }
257 attr = attr->next;
258 }
259 if ((http != 0) && (content != NULL)) {
260 meta = cur;
261 break;
262 }
263
264 }
265 }
266 cur = cur->next;
267 }
268 create:
269 if (meta == NULL) {
270 if ((encoding != NULL) && (head != NULL)) {
271 /*
272 * Create a new Meta element with the right attributes
273 */
274
275 meta = xmlNewDocNode(doc, NULL, BAD_CAST"meta", NULL);
276 if (head->children == NULL)
277 xmlAddChild(head, meta);
278 else
279 xmlAddPrevSibling(head->children, meta);
280 xmlNewProp(meta, BAD_CAST"http-equiv", BAD_CAST"Content-Type");
281 xmlNewProp(meta, BAD_CAST"content", BAD_CAST newcontent);
282 }
283 } else {
284 /* remove the meta tag if NULL is passed */
285 if (encoding == NULL) {
286 xmlUnlinkNode(meta);
287 xmlFreeNode(meta);
288 }
289 /* change the document only if there is a real encoding change */
290 else if (xmlStrcasestr(content, encoding) == NULL) {
291 xmlSetProp(meta, BAD_CAST"content", BAD_CAST newcontent);
292 }
293 }
294
295
296 return(0);
297 }
298
299 /**
300 * booleanHTMLAttrs:
301 *
302 * These are the HTML attributes which will be output
303 * in minimized form, i.e. <option selected="selected"> will be
304 * output as <option selected>, as per XSLT 1.0 16.2 "HTML Output Method"
305 *
306 */
307 static const char* htmlBooleanAttrs[] = {
308 "checked", "compact", "declare", "defer", "disabled", "ismap",
309 "multiple", "nohref", "noresize", "noshade", "nowrap", "readonly",
310 "selected", NULL
311 };
312
313
314 /**
315 * htmlIsBooleanAttr:
316 * @name: the name of the attribute to check
317 *
318 * Determine if a given attribute is a boolean attribute.
319 *
320 * returns: false if the attribute is not boolean, true otherwise.
321 */
322 int
htmlIsBooleanAttr(const xmlChar * name)323 htmlIsBooleanAttr(const xmlChar *name)
324 {
325 int i = 0;
326
327 while (htmlBooleanAttrs[i] != NULL) {
328 if (xmlStrcasecmp((const xmlChar *)htmlBooleanAttrs[i], name) == 0)
329 return 1;
330 i++;
331 }
332 return 0;
333 }
334
335 #ifdef LIBXML_OUTPUT_ENABLED
336 /*
337 * private routine exported from xmlIO.c
338 */
339 xmlOutputBufferPtr
340 xmlAllocOutputBufferInternal(xmlCharEncodingHandlerPtr encoder);
341 /************************************************************************
342 * *
343 * Output error handlers *
344 * *
345 ************************************************************************/
346 /**
347 * htmlSaveErrMemory:
348 * @extra: extra informations
349 *
350 * Handle an out of memory condition
351 */
352 static void
htmlSaveErrMemory(const char * extra)353 htmlSaveErrMemory(const char *extra)
354 {
355 __xmlSimpleError(XML_FROM_OUTPUT, XML_ERR_NO_MEMORY, NULL, NULL, extra);
356 }
357
358 /**
359 * htmlSaveErr:
360 * @code: the error number
361 * @node: the location of the error.
362 * @extra: extra informations
363 *
364 * Handle an out of memory condition
365 */
366 static void
htmlSaveErr(int code,xmlNodePtr node,const char * extra)367 htmlSaveErr(int code, xmlNodePtr node, const char *extra)
368 {
369 const char *msg = NULL;
370
371 switch(code) {
372 case XML_SAVE_NOT_UTF8:
373 msg = "string is not in UTF-8\n";
374 break;
375 case XML_SAVE_CHAR_INVALID:
376 msg = "invalid character value\n";
377 break;
378 case XML_SAVE_UNKNOWN_ENCODING:
379 msg = "unknown encoding %s\n";
380 break;
381 case XML_SAVE_NO_DOCTYPE:
382 msg = "HTML has no DOCTYPE\n";
383 break;
384 default:
385 msg = "unexpected error number\n";
386 }
387 __xmlSimpleError(XML_FROM_OUTPUT, code, node, msg, extra);
388 }
389
390 /************************************************************************
391 * *
392 * Dumping HTML tree content to a simple buffer *
393 * *
394 ************************************************************************/
395
396 /**
397 * htmlBufNodeDumpFormat:
398 * @buf: the xmlBufPtr output
399 * @doc: the document
400 * @cur: the current node
401 * @format: should formatting spaces been added
402 *
403 * Dump an HTML node, recursive behaviour,children are printed too.
404 *
405 * Returns the number of byte written or -1 in case of error
406 */
407 static size_t
htmlBufNodeDumpFormat(xmlBufPtr buf,xmlDocPtr doc,xmlNodePtr cur,int format)408 htmlBufNodeDumpFormat(xmlBufPtr buf, xmlDocPtr doc, xmlNodePtr cur,
409 int format) {
410 size_t use;
411 int ret;
412 xmlOutputBufferPtr outbuf;
413
414 if (cur == NULL) {
415 return (-1);
416 }
417 if (buf == NULL) {
418 return (-1);
419 }
420 outbuf = (xmlOutputBufferPtr) xmlMalloc(sizeof(xmlOutputBuffer));
421 if (outbuf == NULL) {
422 htmlSaveErrMemory("allocating HTML output buffer");
423 return (-1);
424 }
425 memset(outbuf, 0, (size_t) sizeof(xmlOutputBuffer));
426 outbuf->buffer = buf;
427 outbuf->encoder = NULL;
428 outbuf->writecallback = NULL;
429 outbuf->closecallback = NULL;
430 outbuf->context = NULL;
431 outbuf->written = 0;
432
433 use = xmlBufUse(buf);
434 htmlNodeDumpFormatOutput(outbuf, doc, cur, NULL, format);
435 xmlFree(outbuf);
436 ret = xmlBufUse(buf) - use;
437 return (ret);
438 }
439
440 /**
441 * htmlNodeDump:
442 * @buf: the HTML buffer output
443 * @doc: the document
444 * @cur: the current node
445 *
446 * Dump an HTML node, recursive behaviour,children are printed too,
447 * and formatting returns are added.
448 *
449 * Returns the number of byte written or -1 in case of error
450 */
451 int
htmlNodeDump(xmlBufferPtr buf,xmlDocPtr doc,xmlNodePtr cur)452 htmlNodeDump(xmlBufferPtr buf, xmlDocPtr doc, xmlNodePtr cur) {
453 xmlBufPtr buffer;
454 size_t ret;
455
456 if ((buf == NULL) || (cur == NULL))
457 return(-1);
458
459 xmlInitParser();
460 buffer = xmlBufFromBuffer(buf);
461 if (buffer == NULL)
462 return(-1);
463
464 ret = htmlBufNodeDumpFormat(buffer, doc, cur, 1);
465
466 xmlBufBackToBuffer(buffer);
467
468 if (ret > INT_MAX)
469 return(-1);
470 return((int) ret);
471 }
472
473 /**
474 * htmlNodeDumpFileFormat:
475 * @out: the FILE pointer
476 * @doc: the document
477 * @cur: the current node
478 * @encoding: the document encoding
479 * @format: should formatting spaces been added
480 *
481 * Dump an HTML node, recursive behaviour,children are printed too.
482 *
483 * TODO: if encoding == NULL try to save in the doc encoding
484 *
485 * returns: the number of byte written or -1 in case of failure.
486 */
487 int
htmlNodeDumpFileFormat(FILE * out,xmlDocPtr doc,xmlNodePtr cur,const char * encoding,int format)488 htmlNodeDumpFileFormat(FILE *out, xmlDocPtr doc,
489 xmlNodePtr cur, const char *encoding, int format) {
490 xmlOutputBufferPtr buf;
491 xmlCharEncodingHandlerPtr handler = NULL;
492 int ret;
493
494 xmlInitParser();
495
496 if (encoding != NULL) {
497 xmlCharEncoding enc;
498
499 enc = xmlParseCharEncoding(encoding);
500 if (enc != XML_CHAR_ENCODING_UTF8) {
501 handler = xmlFindCharEncodingHandler(encoding);
502 if (handler == NULL)
503 htmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);
504 }
505 }
506
507 /*
508 * Fallback to HTML or ASCII when the encoding is unspecified
509 */
510 if (handler == NULL)
511 handler = xmlFindCharEncodingHandler("HTML");
512 if (handler == NULL)
513 handler = xmlFindCharEncodingHandler("ascii");
514
515 /*
516 * save the content to a temp buffer.
517 */
518 buf = xmlOutputBufferCreateFile(out, handler);
519 if (buf == NULL) return(0);
520
521 htmlNodeDumpFormatOutput(buf, doc, cur, encoding, format);
522
523 ret = xmlOutputBufferClose(buf);
524 return(ret);
525 }
526
527 /**
528 * htmlNodeDumpFile:
529 * @out: the FILE pointer
530 * @doc: the document
531 * @cur: the current node
532 *
533 * Dump an HTML node, recursive behaviour,children are printed too,
534 * and formatting returns are added.
535 */
536 void
htmlNodeDumpFile(FILE * out,xmlDocPtr doc,xmlNodePtr cur)537 htmlNodeDumpFile(FILE *out, xmlDocPtr doc, xmlNodePtr cur) {
538 htmlNodeDumpFileFormat(out, doc, cur, NULL, 1);
539 }
540
541 /**
542 * htmlDocDumpMemoryFormat:
543 * @cur: the document
544 * @mem: OUT: the memory pointer
545 * @size: OUT: the memory length
546 * @format: should formatting spaces been added
547 *
548 * Dump an HTML document in memory and return the xmlChar * and it's size.
549 * It's up to the caller to free the memory.
550 */
551 void
htmlDocDumpMemoryFormat(xmlDocPtr cur,xmlChar ** mem,int * size,int format)552 htmlDocDumpMemoryFormat(xmlDocPtr cur, xmlChar**mem, int *size, int format) {
553 xmlOutputBufferPtr buf;
554 xmlCharEncodingHandlerPtr handler = NULL;
555 const char *encoding;
556
557 xmlInitParser();
558
559 if ((mem == NULL) || (size == NULL))
560 return;
561 if (cur == NULL) {
562 *mem = NULL;
563 *size = 0;
564 return;
565 }
566
567 encoding = (const char *) htmlGetMetaEncoding(cur);
568
569 if (encoding != NULL) {
570 xmlCharEncoding enc;
571
572 enc = xmlParseCharEncoding(encoding);
573 if (enc != cur->charset) {
574 if (cur->charset != XML_CHAR_ENCODING_UTF8) {
575 /*
576 * Not supported yet
577 */
578 *mem = NULL;
579 *size = 0;
580 return;
581 }
582
583 handler = xmlFindCharEncodingHandler(encoding);
584 if (handler == NULL)
585 htmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);
586
587 } else {
588 handler = xmlFindCharEncodingHandler(encoding);
589 }
590 }
591
592 /*
593 * Fallback to HTML or ASCII when the encoding is unspecified
594 */
595 if (handler == NULL)
596 handler = xmlFindCharEncodingHandler("HTML");
597 if (handler == NULL)
598 handler = xmlFindCharEncodingHandler("ascii");
599
600 buf = xmlAllocOutputBufferInternal(handler);
601 if (buf == NULL) {
602 *mem = NULL;
603 *size = 0;
604 return;
605 }
606
607 htmlDocContentDumpFormatOutput(buf, cur, NULL, format);
608
609 xmlOutputBufferFlush(buf);
610 if (buf->conv != NULL) {
611 *size = xmlBufUse(buf->conv);
612 *mem = xmlStrndup(xmlBufContent(buf->conv), *size);
613 } else {
614 *size = xmlBufUse(buf->buffer);
615 *mem = xmlStrndup(xmlBufContent(buf->buffer), *size);
616 }
617 (void)xmlOutputBufferClose(buf);
618 }
619
620 /**
621 * htmlDocDumpMemory:
622 * @cur: the document
623 * @mem: OUT: the memory pointer
624 * @size: OUT: the memory length
625 *
626 * Dump an HTML document in memory and return the xmlChar * and it's size.
627 * It's up to the caller to free the memory.
628 */
629 void
htmlDocDumpMemory(xmlDocPtr cur,xmlChar ** mem,int * size)630 htmlDocDumpMemory(xmlDocPtr cur, xmlChar**mem, int *size) {
631 htmlDocDumpMemoryFormat(cur, mem, size, 1);
632 }
633
634
635 /************************************************************************
636 * *
637 * Dumping HTML tree content to an I/O output buffer *
638 * *
639 ************************************************************************/
640
641 void xmlNsListDumpOutput(xmlOutputBufferPtr buf, xmlNsPtr cur);
642
643 /**
644 * htmlDtdDumpOutput:
645 * @buf: the HTML buffer output
646 * @doc: the document
647 * @encoding: the encoding string
648 *
649 * TODO: check whether encoding is needed
650 *
651 * Dump the HTML document DTD, if any.
652 */
653 static void
htmlDtdDumpOutput(xmlOutputBufferPtr buf,xmlDocPtr doc,const char * encoding ATTRIBUTE_UNUSED)654 htmlDtdDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
655 const char *encoding ATTRIBUTE_UNUSED) {
656 xmlDtdPtr cur = doc->intSubset;
657
658 if (cur == NULL) {
659 htmlSaveErr(XML_SAVE_NO_DOCTYPE, (xmlNodePtr) doc, NULL);
660 return;
661 }
662 xmlOutputBufferWriteString(buf, "<!DOCTYPE ");
663 xmlOutputBufferWriteString(buf, (const char *)cur->name);
664 if (cur->ExternalID != NULL) {
665 xmlOutputBufferWriteString(buf, " PUBLIC ");
666 xmlBufWriteQuotedString(buf->buffer, cur->ExternalID);
667 if (cur->SystemID != NULL) {
668 xmlOutputBufferWriteString(buf, " ");
669 xmlBufWriteQuotedString(buf->buffer, cur->SystemID);
670 }
671 } else if (cur->SystemID != NULL) {
672 xmlOutputBufferWriteString(buf, " SYSTEM ");
673 xmlBufWriteQuotedString(buf->buffer, cur->SystemID);
674 }
675 xmlOutputBufferWriteString(buf, ">\n");
676 }
677
678 /**
679 * htmlAttrDumpOutput:
680 * @buf: the HTML buffer output
681 * @doc: the document
682 * @cur: the attribute pointer
683 * @encoding: the encoding string
684 *
685 * Dump an HTML attribute
686 */
687 static void
htmlAttrDumpOutput(xmlOutputBufferPtr buf,xmlDocPtr doc,xmlAttrPtr cur,const char * encoding ATTRIBUTE_UNUSED)688 htmlAttrDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc, xmlAttrPtr cur,
689 const char *encoding ATTRIBUTE_UNUSED) {
690 xmlChar *value;
691
692 /*
693 * The html output method should not escape a & character
694 * occurring in an attribute value immediately followed by
695 * a { character (see Section B.7.1 of the HTML 4.0 Recommendation).
696 * This is implemented in xmlEncodeEntitiesReentrant
697 */
698
699 if (cur == NULL) {
700 return;
701 }
702 xmlOutputBufferWriteString(buf, " ");
703 if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
704 xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
705 xmlOutputBufferWriteString(buf, ":");
706 }
707 xmlOutputBufferWriteString(buf, (const char *)cur->name);
708 if ((cur->children != NULL) && (!htmlIsBooleanAttr(cur->name))) {
709 value = xmlNodeListGetString(doc, cur->children, 0);
710 if (value) {
711 xmlOutputBufferWriteString(buf, "=");
712 if ((cur->ns == NULL) && (cur->parent != NULL) &&
713 (cur->parent->ns == NULL) &&
714 ((!xmlStrcasecmp(cur->name, BAD_CAST "href")) ||
715 (!xmlStrcasecmp(cur->name, BAD_CAST "action")) ||
716 (!xmlStrcasecmp(cur->name, BAD_CAST "src")) ||
717 ((!xmlStrcasecmp(cur->name, BAD_CAST "name")) &&
718 (!xmlStrcasecmp(cur->parent->name, BAD_CAST "a"))))) {
719 xmlChar *escaped;
720 xmlChar *tmp = value;
721
722 while (IS_BLANK_CH(*tmp)) tmp++;
723
724 /*
725 * the < and > have already been escaped at the entity level
726 * And doing so here breaks server side includes
727 */
728 escaped = xmlURIEscapeStr(tmp, BAD_CAST"@/:=?;#%&,+<>");
729 if (escaped != NULL) {
730 xmlBufWriteQuotedString(buf->buffer, escaped);
731 xmlFree(escaped);
732 } else {
733 xmlBufWriteQuotedString(buf->buffer, value);
734 }
735 } else {
736 xmlBufWriteQuotedString(buf->buffer, value);
737 }
738 xmlFree(value);
739 } else {
740 xmlOutputBufferWriteString(buf, "=\"\"");
741 }
742 }
743 }
744
745 /**
746 * htmlAttrListDumpOutput:
747 * @buf: the HTML buffer output
748 * @doc: the document
749 * @cur: the first attribute pointer
750 * @encoding: the encoding string
751 *
752 * Dump a list of HTML attributes
753 */
754 static void
htmlAttrListDumpOutput(xmlOutputBufferPtr buf,xmlDocPtr doc,xmlAttrPtr cur,const char * encoding)755 htmlAttrListDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc, xmlAttrPtr cur, const char *encoding) {
756 if (cur == NULL) {
757 return;
758 }
759 while (cur != NULL) {
760 htmlAttrDumpOutput(buf, doc, cur, encoding);
761 cur = cur->next;
762 }
763 }
764
765
766
767 /**
768 * htmlNodeListDumpOutput:
769 * @buf: the HTML buffer output
770 * @doc: the document
771 * @cur: the first node
772 * @encoding: the encoding string
773 * @format: should formatting spaces been added
774 *
775 * Dump an HTML node list, recursive behaviour,children are printed too.
776 */
777 static void
htmlNodeListDumpOutput(xmlOutputBufferPtr buf,xmlDocPtr doc,xmlNodePtr cur,const char * encoding,int format)778 htmlNodeListDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
779 xmlNodePtr cur, const char *encoding, int format) {
780 if (cur == NULL) {
781 return;
782 }
783 while (cur != NULL) {
784 htmlNodeDumpFormatOutput(buf, doc, cur, encoding, format);
785 cur = cur->next;
786 }
787 }
788
789 /**
790 * htmlNodeDumpFormatOutput:
791 * @buf: the HTML buffer output
792 * @doc: the document
793 * @cur: the current node
794 * @encoding: the encoding string
795 * @format: should formatting spaces been added
796 *
797 * Dump an HTML node, recursive behaviour,children are printed too.
798 */
799 void
htmlNodeDumpFormatOutput(xmlOutputBufferPtr buf,xmlDocPtr doc,xmlNodePtr cur,const char * encoding,int format)800 htmlNodeDumpFormatOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
801 xmlNodePtr cur, const char *encoding, int format) {
802 const htmlElemDesc * info;
803
804 xmlInitParser();
805
806 if ((cur == NULL) || (buf == NULL)) {
807 return;
808 }
809 /*
810 * Special cases.
811 */
812 if (cur->type == XML_DTD_NODE)
813 return;
814 if ((cur->type == XML_HTML_DOCUMENT_NODE) ||
815 (cur->type == XML_DOCUMENT_NODE)){
816 htmlDocContentDumpOutput(buf, (xmlDocPtr) cur, encoding);
817 return;
818 }
819 if (cur->type == XML_ATTRIBUTE_NODE) {
820 htmlAttrDumpOutput(buf, doc, (xmlAttrPtr) cur, encoding);
821 return;
822 }
823 if (cur->type == HTML_TEXT_NODE) {
824 if (cur->content != NULL) {
825 if (((cur->name == (const xmlChar *)xmlStringText) ||
826 (cur->name != (const xmlChar *)xmlStringTextNoenc)) &&
827 ((cur->parent == NULL) ||
828 ((xmlStrcasecmp(cur->parent->name, BAD_CAST "script")) &&
829 (xmlStrcasecmp(cur->parent->name, BAD_CAST "style"))))) {
830 xmlChar *buffer;
831
832 buffer = xmlEncodeEntitiesReentrant(doc, cur->content);
833 if (buffer != NULL) {
834 xmlOutputBufferWriteString(buf, (const char *)buffer);
835 xmlFree(buffer);
836 }
837 } else {
838 xmlOutputBufferWriteString(buf, (const char *)cur->content);
839 }
840 }
841 return;
842 }
843 if (cur->type == HTML_COMMENT_NODE) {
844 if (cur->content != NULL) {
845 xmlOutputBufferWriteString(buf, "<!--");
846 xmlOutputBufferWriteString(buf, (const char *)cur->content);
847 xmlOutputBufferWriteString(buf, "-->");
848 }
849 return;
850 }
851 if (cur->type == HTML_PI_NODE) {
852 if (cur->name == NULL)
853 return;
854 xmlOutputBufferWriteString(buf, "<?");
855 xmlOutputBufferWriteString(buf, (const char *)cur->name);
856 if (cur->content != NULL) {
857 xmlOutputBufferWriteString(buf, " ");
858 xmlOutputBufferWriteString(buf, (const char *)cur->content);
859 }
860 xmlOutputBufferWriteString(buf, ">");
861 return;
862 }
863 if (cur->type == HTML_ENTITY_REF_NODE) {
864 xmlOutputBufferWriteString(buf, "&");
865 xmlOutputBufferWriteString(buf, (const char *)cur->name);
866 xmlOutputBufferWriteString(buf, ";");
867 return;
868 }
869 if (cur->type == HTML_PRESERVE_NODE) {
870 if (cur->content != NULL) {
871 xmlOutputBufferWriteString(buf, (const char *)cur->content);
872 }
873 return;
874 }
875
876 /*
877 * Get specific HTML info for that node.
878 */
879 if (cur->ns == NULL)
880 info = htmlTagLookup(cur->name);
881 else
882 info = NULL;
883
884 xmlOutputBufferWriteString(buf, "<");
885 if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
886 xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
887 xmlOutputBufferWriteString(buf, ":");
888 }
889 xmlOutputBufferWriteString(buf, (const char *)cur->name);
890 if (cur->nsDef)
891 xmlNsListDumpOutput(buf, cur->nsDef);
892 if (cur->properties != NULL)
893 htmlAttrListDumpOutput(buf, doc, cur->properties, encoding);
894
895 if ((info != NULL) && (info->empty)) {
896 xmlOutputBufferWriteString(buf, ">");
897 if ((format) && (!info->isinline) && (cur->next != NULL)) {
898 if ((cur->next->type != HTML_TEXT_NODE) &&
899 (cur->next->type != HTML_ENTITY_REF_NODE) &&
900 (cur->parent != NULL) &&
901 (cur->parent->name != NULL) &&
902 (cur->parent->name[0] != 'p')) /* p, pre, param */
903 xmlOutputBufferWriteString(buf, "\n");
904 }
905 return;
906 }
907 if (((cur->type == XML_ELEMENT_NODE) || (cur->content == NULL)) &&
908 (cur->children == NULL)) {
909 if ((info != NULL) && (info->saveEndTag != 0) &&
910 (xmlStrcmp(BAD_CAST info->name, BAD_CAST "html")) &&
911 (xmlStrcmp(BAD_CAST info->name, BAD_CAST "body"))) {
912 xmlOutputBufferWriteString(buf, ">");
913 } else {
914 xmlOutputBufferWriteString(buf, "></");
915 if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
916 xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
917 xmlOutputBufferWriteString(buf, ":");
918 }
919 xmlOutputBufferWriteString(buf, (const char *)cur->name);
920 xmlOutputBufferWriteString(buf, ">");
921 }
922 if ((format) && (cur->next != NULL) &&
923 (info != NULL) && (!info->isinline)) {
924 if ((cur->next->type != HTML_TEXT_NODE) &&
925 (cur->next->type != HTML_ENTITY_REF_NODE) &&
926 (cur->parent != NULL) &&
927 (cur->parent->name != NULL) &&
928 (cur->parent->name[0] != 'p')) /* p, pre, param */
929 xmlOutputBufferWriteString(buf, "\n");
930 }
931 return;
932 }
933 xmlOutputBufferWriteString(buf, ">");
934 if ((cur->type != XML_ELEMENT_NODE) &&
935 (cur->content != NULL)) {
936 /*
937 * Uses the OutputBuffer property to automatically convert
938 * invalids to charrefs
939 */
940
941 xmlOutputBufferWriteString(buf, (const char *) cur->content);
942 }
943 if (cur->children != NULL) {
944 if ((format) && (info != NULL) && (!info->isinline) &&
945 (cur->children->type != HTML_TEXT_NODE) &&
946 (cur->children->type != HTML_ENTITY_REF_NODE) &&
947 (cur->children != cur->last) &&
948 (cur->name != NULL) &&
949 (cur->name[0] != 'p')) /* p, pre, param */
950 xmlOutputBufferWriteString(buf, "\n");
951 htmlNodeListDumpOutput(buf, doc, cur->children, encoding, format);
952 if ((format) && (info != NULL) && (!info->isinline) &&
953 (cur->last->type != HTML_TEXT_NODE) &&
954 (cur->last->type != HTML_ENTITY_REF_NODE) &&
955 (cur->children != cur->last) &&
956 (cur->name != NULL) &&
957 (cur->name[0] != 'p')) /* p, pre, param */
958 xmlOutputBufferWriteString(buf, "\n");
959 }
960 xmlOutputBufferWriteString(buf, "</");
961 if ((cur->ns != NULL) && (cur->ns->prefix != NULL)) {
962 xmlOutputBufferWriteString(buf, (const char *)cur->ns->prefix);
963 xmlOutputBufferWriteString(buf, ":");
964 }
965 xmlOutputBufferWriteString(buf, (const char *)cur->name);
966 xmlOutputBufferWriteString(buf, ">");
967 if ((format) && (info != NULL) && (!info->isinline) &&
968 (cur->next != NULL)) {
969 if ((cur->next->type != HTML_TEXT_NODE) &&
970 (cur->next->type != HTML_ENTITY_REF_NODE) &&
971 (cur->parent != NULL) &&
972 (cur->parent->name != NULL) &&
973 (cur->parent->name[0] != 'p')) /* p, pre, param */
974 xmlOutputBufferWriteString(buf, "\n");
975 }
976 }
977
978 /**
979 * htmlNodeDumpOutput:
980 * @buf: the HTML buffer output
981 * @doc: the document
982 * @cur: the current node
983 * @encoding: the encoding string
984 *
985 * Dump an HTML node, recursive behaviour,children are printed too,
986 * and formatting returns/spaces are added.
987 */
988 void
htmlNodeDumpOutput(xmlOutputBufferPtr buf,xmlDocPtr doc,xmlNodePtr cur,const char * encoding)989 htmlNodeDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr doc,
990 xmlNodePtr cur, const char *encoding) {
991 htmlNodeDumpFormatOutput(buf, doc, cur, encoding, 1);
992 }
993
994 /**
995 * htmlDocContentDumpFormatOutput:
996 * @buf: the HTML buffer output
997 * @cur: the document
998 * @encoding: the encoding string
999 * @format: should formatting spaces been added
1000 *
1001 * Dump an HTML document.
1002 */
1003 void
htmlDocContentDumpFormatOutput(xmlOutputBufferPtr buf,xmlDocPtr cur,const char * encoding,int format)1004 htmlDocContentDumpFormatOutput(xmlOutputBufferPtr buf, xmlDocPtr cur,
1005 const char *encoding, int format) {
1006 int type;
1007
1008 xmlInitParser();
1009
1010 if ((buf == NULL) || (cur == NULL))
1011 return;
1012
1013 /*
1014 * force to output the stuff as HTML, especially for entities
1015 */
1016 type = cur->type;
1017 cur->type = XML_HTML_DOCUMENT_NODE;
1018 if (cur->intSubset != NULL) {
1019 htmlDtdDumpOutput(buf, cur, NULL);
1020 }
1021 if (cur->children != NULL) {
1022 htmlNodeListDumpOutput(buf, cur, cur->children, encoding, format);
1023 }
1024 xmlOutputBufferWriteString(buf, "\n");
1025 cur->type = (xmlElementType) type;
1026 }
1027
1028 /**
1029 * htmlDocContentDumpOutput:
1030 * @buf: the HTML buffer output
1031 * @cur: the document
1032 * @encoding: the encoding string
1033 *
1034 * Dump an HTML document. Formating return/spaces are added.
1035 */
1036 void
htmlDocContentDumpOutput(xmlOutputBufferPtr buf,xmlDocPtr cur,const char * encoding)1037 htmlDocContentDumpOutput(xmlOutputBufferPtr buf, xmlDocPtr cur,
1038 const char *encoding) {
1039 htmlDocContentDumpFormatOutput(buf, cur, encoding, 1);
1040 }
1041
1042 /************************************************************************
1043 * *
1044 * Saving functions front-ends *
1045 * *
1046 ************************************************************************/
1047
1048 /**
1049 * htmlDocDump:
1050 * @f: the FILE*
1051 * @cur: the document
1052 *
1053 * Dump an HTML document to an open FILE.
1054 *
1055 * returns: the number of byte written or -1 in case of failure.
1056 */
1057 int
htmlDocDump(FILE * f,xmlDocPtr cur)1058 htmlDocDump(FILE *f, xmlDocPtr cur) {
1059 xmlOutputBufferPtr buf;
1060 xmlCharEncodingHandlerPtr handler = NULL;
1061 const char *encoding;
1062 int ret;
1063
1064 xmlInitParser();
1065
1066 if ((cur == NULL) || (f == NULL)) {
1067 return(-1);
1068 }
1069
1070 encoding = (const char *) htmlGetMetaEncoding(cur);
1071
1072 if (encoding != NULL) {
1073 xmlCharEncoding enc;
1074
1075 enc = xmlParseCharEncoding(encoding);
1076 if (enc != cur->charset) {
1077 if (cur->charset != XML_CHAR_ENCODING_UTF8) {
1078 /*
1079 * Not supported yet
1080 */
1081 return(-1);
1082 }
1083
1084 handler = xmlFindCharEncodingHandler(encoding);
1085 if (handler == NULL)
1086 htmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);
1087 } else {
1088 handler = xmlFindCharEncodingHandler(encoding);
1089 }
1090 }
1091
1092 /*
1093 * Fallback to HTML or ASCII when the encoding is unspecified
1094 */
1095 if (handler == NULL)
1096 handler = xmlFindCharEncodingHandler("HTML");
1097 if (handler == NULL)
1098 handler = xmlFindCharEncodingHandler("ascii");
1099
1100 buf = xmlOutputBufferCreateFile(f, handler);
1101 if (buf == NULL) return(-1);
1102 htmlDocContentDumpOutput(buf, cur, NULL);
1103
1104 ret = xmlOutputBufferClose(buf);
1105 return(ret);
1106 }
1107
1108 /**
1109 * htmlSaveFile:
1110 * @filename: the filename (or URL)
1111 * @cur: the document
1112 *
1113 * Dump an HTML document to a file. If @filename is "-" the stdout file is
1114 * used.
1115 * returns: the number of byte written or -1 in case of failure.
1116 */
1117 int
htmlSaveFile(const char * filename,xmlDocPtr cur)1118 htmlSaveFile(const char *filename, xmlDocPtr cur) {
1119 xmlOutputBufferPtr buf;
1120 xmlCharEncodingHandlerPtr handler = NULL;
1121 const char *encoding;
1122 int ret;
1123
1124 if ((cur == NULL) || (filename == NULL))
1125 return(-1);
1126
1127 xmlInitParser();
1128
1129 encoding = (const char *) htmlGetMetaEncoding(cur);
1130
1131 if (encoding != NULL) {
1132 xmlCharEncoding enc;
1133
1134 enc = xmlParseCharEncoding(encoding);
1135 if (enc != cur->charset) {
1136 if (cur->charset != XML_CHAR_ENCODING_UTF8) {
1137 /*
1138 * Not supported yet
1139 */
1140 return(-1);
1141 }
1142
1143 handler = xmlFindCharEncodingHandler(encoding);
1144 if (handler == NULL)
1145 htmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);
1146 }
1147 }
1148
1149 /*
1150 * Fallback to HTML or ASCII when the encoding is unspecified
1151 */
1152 if (handler == NULL)
1153 handler = xmlFindCharEncodingHandler("HTML");
1154 if (handler == NULL)
1155 handler = xmlFindCharEncodingHandler("ascii");
1156
1157 /*
1158 * save the content to a temp buffer.
1159 */
1160 buf = xmlOutputBufferCreateFilename(filename, handler, cur->compression);
1161 if (buf == NULL) return(0);
1162
1163 htmlDocContentDumpOutput(buf, cur, NULL);
1164
1165 ret = xmlOutputBufferClose(buf);
1166 return(ret);
1167 }
1168
1169 /**
1170 * htmlSaveFileFormat:
1171 * @filename: the filename
1172 * @cur: the document
1173 * @format: should formatting spaces been added
1174 * @encoding: the document encoding
1175 *
1176 * Dump an HTML document to a file using a given encoding.
1177 *
1178 * returns: the number of byte written or -1 in case of failure.
1179 */
1180 int
htmlSaveFileFormat(const char * filename,xmlDocPtr cur,const char * encoding,int format)1181 htmlSaveFileFormat(const char *filename, xmlDocPtr cur,
1182 const char *encoding, int format) {
1183 xmlOutputBufferPtr buf;
1184 xmlCharEncodingHandlerPtr handler = NULL;
1185 int ret;
1186
1187 if ((cur == NULL) || (filename == NULL))
1188 return(-1);
1189
1190 xmlInitParser();
1191
1192 if (encoding != NULL) {
1193 xmlCharEncoding enc;
1194
1195 enc = xmlParseCharEncoding(encoding);
1196 if (enc != cur->charset) {
1197 if (cur->charset != XML_CHAR_ENCODING_UTF8) {
1198 /*
1199 * Not supported yet
1200 */
1201 return(-1);
1202 }
1203
1204 handler = xmlFindCharEncodingHandler(encoding);
1205 if (handler == NULL)
1206 htmlSaveErr(XML_SAVE_UNKNOWN_ENCODING, NULL, encoding);
1207 }
1208 htmlSetMetaEncoding(cur, (const xmlChar *) encoding);
1209 } else {
1210 htmlSetMetaEncoding(cur, (const xmlChar *) "UTF-8");
1211 }
1212
1213 /*
1214 * Fallback to HTML or ASCII when the encoding is unspecified
1215 */
1216 if (handler == NULL)
1217 handler = xmlFindCharEncodingHandler("HTML");
1218 if (handler == NULL)
1219 handler = xmlFindCharEncodingHandler("ascii");
1220
1221 /*
1222 * save the content to a temp buffer.
1223 */
1224 buf = xmlOutputBufferCreateFilename(filename, handler, 0);
1225 if (buf == NULL) return(0);
1226
1227 htmlDocContentDumpFormatOutput(buf, cur, encoding, format);
1228
1229 ret = xmlOutputBufferClose(buf);
1230 return(ret);
1231 }
1232
1233 /**
1234 * htmlSaveFileEnc:
1235 * @filename: the filename
1236 * @cur: the document
1237 * @encoding: the document encoding
1238 *
1239 * Dump an HTML document to a file using a given encoding
1240 * and formatting returns/spaces are added.
1241 *
1242 * returns: the number of byte written or -1 in case of failure.
1243 */
1244 int
htmlSaveFileEnc(const char * filename,xmlDocPtr cur,const char * encoding)1245 htmlSaveFileEnc(const char *filename, xmlDocPtr cur, const char *encoding) {
1246 return(htmlSaveFileFormat(filename, cur, encoding, 1));
1247 }
1248
1249 #endif /* LIBXML_OUTPUT_ENABLED */
1250
1251 #define bottom_HTMLtree
1252 #include "elfgcchack.h"
1253 #endif /* LIBXML_HTML_ENABLED */
1254