release/src/router/libxml2/HTMLtree.c

   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 *
  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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
 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
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
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
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
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
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
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 */