inc/rdf.class.php

   1 <?php
   2 /* $Id$ */
   3
   4 //
   5 // +----------------------------------------------------------------------+
   6 // | rss Parser                                                           |
   7 // | Copyright (c) 2001 Stefan Saasen                                     |
   8 // +----------------------------------------------------------------------+
   9 // | The contents of this file are subject to the Mozilla Public License  |
  10 // | Version 1.1 (the "License"); you may not use this file except in     |
  11 // | compliance with the License. You may obtain a copy of the License at |
  12 // | http://www.mozilla.org/MPL/                                          |
  13 // |                                                                      |
  14 // | Software distributed under the License is distributed on an "AS IS"  |
  15 // | basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See  |
  16 // | the License for the specific language governing rights and           |
  17 // | limitations under the License.                                       |
  18 // +----------------------------------------------------------------------+
  19 // |                                                                      |
  20 // | Maintainer and initial developer:                                    |
  21 // | Stefan Saasen <s@fase4.com>                                          |
  22 // |                                                                      |
  23 // | Proxy and authentication methods added by:                           |
  24 // | Marco Kraus <marco.kraus@siemens.com>                                |
  25 // |                                                                      |
  26 // | Decoding of data by htmlentities or utf8_decode added by:            |
  27 // | Roland Haeder <webmaster@mxchange.org>                               |
  28 // |                                                                      |
  29 // +----------------------------------------------------------------------+
  30 // | Ref:                                                                 |
  31 // |   @link http://www.fase4.com/rdf/                   Latest release   |
  32 // +----------------------------------------------------------------------+
  33
  34 /**
  35  * Class RSS Parser
  36  *
  37  * This class offers methods to parse RSS Files
  38  *
  39  * @link      http://www.fase4.com/rdf/ Latest release of this class
  40  * @package   rss
  41  * @copyright Copyright (c) 2001 fase4.com. All rights reserved.
  42  * @author    Stefan Saasen <s@fase4.com>
  43  * @author    Roland Haeder <webmaster@mxchange.org>
  44  * @version   1.7 ($Date$Revision: 856 $
  45  * @access    public
  46  */
  47
  48 class fase4_rdf {
  49
  50         /**
  51          * Word-wrapping mode for description, set it to 0 do disable this feature! Ommits _use_nl2br!
  52          *
  53          * @access private
  54          * @var    integer
  55          */
  56         var $_word_wrap = 0;
  57
  58         /**
  59          * Wether to recode \n -> <br /> or not in description
  60          *
  61          * @access private
  62          * @var    boolean
  63          */
  64         var $_use_nl2br = true;
  65
  66         /**
  67          * Sets the decoding mode of the read data (UTF8 scrambles some german umlauts here!)
  68          *
  69          * "htmlentities" - Use the function htmlentities()
  70          * "utf8_decode"  - Use the function ut8_decode() when you have UTF8 encoded text
  71          *
  72          * @access private
  73          * @var    string
  74          */
  75         var $_decoding_mode = "utf8_decode";
  76
  77         /**
  78          * If $_link_target is set a target='xxx' attribute in each <a /> and <form /> html tag will be added
  79          *
  80          * Possible values are "_blank", "_content", "_parent", "_self", "_top"
  81          *
  82          * @access private
  83          * @var    string
  84          */
  85         var $_link_target = "_blank";
  86
  87         /**
  88          * vars for proxy settings - Prox Host
  89          *
  90          * @access private
  91          * @var      string
  92          */
  93         var $_phost = "";
  94
  95         /**
  96          * vars for proxy settings - Prox Port
  97          *
  98          * @access private
  99          * @var      string
 100          */
 101         var $_pport = "";
 102
 103         /**
 104          * vars for proxy settings - Prox Username
 105          *
 106          * @access private
 107          * @var      string
 108          */
 109         var $_pname = "";
 110
 111         /**
 112          * vars for proxy settings - Prox Password
 113          *
 114          * @access private
 115          * @var      string
 116          */
 117         var $_ppasswd = "";
 118
 119         /**
 120          * just a flag for checking if proxy-support should be enabled
 121          * set default to false (will be enabled if set_proxy is called)
 122          *
 123          * @access   private
 124          * @see      set_proxy()
 125          * @var      bool
 126          */
 127         var $_use_proxy = false;
 128
 129         /**
 130          * just a flag for checking if proxy-support with authentication
 131          * should be enabled
 132          * set default to false (will be enabled if set_proxy is called)
 133          *
 134          * @access   private
 135          * @see      set_proxy()
 136          * @var      boolean
 137          */
 138         var $_use_proxy_auth = false;
 139
 140         /**
 141          * The time the Files will be cached (in seconds).
 142          *
 143          * @access private
 144          * @var    int
 145          */
 146         var $_refresh = 60;   // int
 147
 148         /**
 149          * The Name of the cached File.
 150          *
 151          * @access private
 152          * @var    string
 153          */
 154         var $_cached_file = "";   // String
 155
 156         /**
 157          * Indicates whether the cached or the remote file was used.
 158          *
 159          * @access private
 160          * @var    boolean
 161          */
 162         var $_use_cached_file = true;
 163
 164         /**
 165          * (fast|normal) depends on _use_dynamic_display(). _use_dynamic_display( TRUE ) -> 'normal', otherwise 'fast'
 166          *
 167          * @access private
 168          * @var    string
 169          */
 170         var $_cache_type = "fast";
 171
 172         /**
 173          * The Name of the Remote File.
 174          *
 175          * @access private
 176          * @var    string
 177          */
 178         var $_remote_file = "";
 179
 180         /**
 181          * Path to the Cache Directory.
 182          *
 183          * @access private
 184          * @var    string
 185          */
 186         var $_cache_dir = "cache/";  // String
 187
 188         /**
 189          * Indicates whether the Creating of the Cache Directory needs to be done or not.
 190          *
 191          * @access private
 192          * @var    boolean
 193          */
 194         var $_cache_dir_ok = false;
 195
 196         /**
 197          * Type of the file to be parsed (RSS or RDF).
 198          *
 199          * The Type depends on the root node
 200          *
 201          * @access private
 202          * @var    string
 203          */
 204         var $_type = "rss"; // string (rss or rdf)
 205
 206         /**
 207          * Array of Display Settings.
 208          *
 209          * Specific Parameters can be set to hidden. These are:
 210          * image, channel and textinput. If set to "hidden" those elements won't be displayed.
 211          *
 212          * @access private
 213          * @var    array
 214          */
 215         var $_display_opt = array(
 216                 'build' => "",
 217                 'image' => "",
 218                 'channel' => "",
 219                 'textinput' => "",
 220                 'cache_update' => "",
 221                 'sitelink' => "",
 222                 'refid' => "",
 223                 'reflink' => "",
 224         );
 225
 226         /**
 227          * Defines the width attribute in the table that holds the rdf/rss representation
 228          *
 229          * @access private
 230          * @var    int
 231          * @see    see_table_width()
 232          */
 233         var $_table_width = "100%";
 234
 235         /**
 236          * Indicates whether or not to use dynamic Display Settings
 237          *
 238          * @access private
 239          * @var    array
 240          */
 241         var $_use_dynamic_display = false;
 242
 243         /**
 244          * <item> count
 245          *
 246          * @access private
 247          * @var    int
 248          */
 249         var $_item_count = 0;
 250
 251         /**
 252          * No of max <item>s
 253          *
 254          * @access private
 255          * @var    boolean
 256          */
 257         var $_max_count = false;
 258
 259         /**
 260          * Array containing the content of <channel />
 261          *
 262          * @access private
 263          * @var    array
 264          */
 265         var $_array_channel = array();
 266
 267         /**
 268          * Array containing the content of each <item />
 269          *
 270          * @access private
 271          * @var    array
 272          */
 273         var $_array_item = array();
 274
 275         /**
 276          * Array containing the content of <textinput />
 277          *
 278          * @access private
 279          * @var    array
 280          */
 281         var $_array_textinput = array();
 282
 283         /**
 284          * Array containing the content of <image />
 285          *
 286          * @access private
 287          * @var    array
 288          */
 289         var $_array_image = array();
 290
 291         /**
 292          * Array containing the Channel content. Just For internal XML Parser Purposes.
 293          *
 294          * @access private
 295          * @var    array
 296          */
 297         var $_citem = array();
 298
 299         /**
 300          * Array containing the Channel Parser Depth. Just For internal XML Parser Purposes.
 301          *
 302          * @access private
 303          * @var    array
 304          */
 305         var $_cdepth = array();
 306
 307         /**
 308          * Array containing the Channel tags. Just For internal XML Parser Purposes.
 309          *
 310          * @access private
 311          * @var    array
 312          */
 313         var $_ctags = array( "x" );
 314
 315         /**
 316          * Array containing the Channel content. Just For internal XML Parser Purposes.
 317          *
 318          * @access private
 319          * @var    array
 320          */
 321         var $_item = array();   // Array
 322
 323         /**
 324          * Array containing the Channel Parser Depth. Just For internal XML Parser Purposes.
 325          *
 326          * @access private
 327          * @var    array
 328          */
 329         var $_depth = array();  // Array
 330
 331         /**
 332          * Array containing the tags. Just For internal XML Parser Purposes.
 333          *
 334          * @access private
 335          * @var    array
 336          */
 337         var $_tags = array( "x" );  // Array
 338
 339         /**
 340          * Garbage collection: probability in percent
 341          *
 342          * @var      integer     0 => never
 343          * @access   public
 344          */
 345         var $gc_probability = 1;
 346
 347         /**
 348          * HTML Output
 349          *
 350          * @var      string
 351          * @access   private
 352          */
 353         var $_output = "";
 354
 355         /**
 356          * @var  string
 357          */
 358         var $_parse_mode = "";
 359
 360         // Output variable
 361         var $out = "";
 362
 363         // Salt for hashing
 364         var $salt = "";
 365
 366         /**
 367          * Constructor of our Class
 368          *
 369          * This Method checks if the Cache Directory can be found. Otherwise it tries to creat the Cache Directory at the specified Path.
 370          * Additionally the Refresh Time is set to a default Value of 1200s (20 min).
 371          *
 372          * @access    public
 373          * @author    Stefan Saasen <s@fase4.com>
 374          * @see          _refresh
 375          */
 376         function fase4_rdf()
 377         {
 378                 // default Value, to be overwritten in set_refresh()
 379                 $this->_refresh = (time() - 1200);
 380                 $this->_clear_cItems();
 381                 $this->_clear_Items();
 382         }
 383
 384         /**
 385          * This Method starts the parsing of the specified RDF File. The File can be a local or a remote File.
 386          *
 387          * @access    public
 388          * @author    Stefan Saasen <s@fase4.com>
 389          * @param     string $rdf    RDF File (Location)
 390          * @return    string Displays RDF Content ( using _display() )
 391          * @see          _remote_file, cache()
 392          */
 393         function parse_RDF( $rdf )
 394         {
 395                 unset($this->_array_item);
 396                 $this->_remote_file = $rdf;
 397                 $this->out .= "<!-- http://www.fase4.com/rdf/ -->";
 398                 $this->out .= "<table width=\"".$this->_table_width."\">";
 399                 $this->out .= $this->cache();
 400                 $this->out .= "</table>";
 401                 $this->_output = "";
 402                 $this->_item_count = 0;
 403                 return true;
 404         }
 405
 406         /**
 407          * This Method is called when all parsing is finished to use the garbage collection
 408          *
 409          * @access    public
 410          * @author    Stefan Saasen <s@fase4.com>
 411          * @param     string $rdf    RDF File (Location)
 412          * @return    string Displays RDF Content ( using _display() )
 413          * @see          _remote_file, cache()
 414          */
 415         function finish($return = false)
 416         {
 417                 if (!$return) {
 418                         echo $this->out;
 419                 } else {
 420                         return $this->out;
 421                 }
 422                 flush();
 423                 $this->_garbage_collection();
 424         }
 425
 426         /**
 427          * With this method you can decide whether to use the normal cache and dynamic display Options or to use a static cache.
 428          *
 429          * In the first case the rdf/rss File will be stored locally, in the second case the html output of the specified source will be stored.
 430          * In this case you can not modify the display settings.
 431          * processing time: ( 1.4792) --> remote file
 432          * processing time: ( 0.0313) --> using 'normal cache' with display Modification turned on.
 433          * processing time: ( 0.0019) --> using 'fast cache'
 434          *
 435          * @access    public
 436          * @author    Stefan Saasen <s@fase4.com>
 437          * @param     string $rdf    RDF File (Location)
 438          * @return    string Displays RDF Content ( using _display() )
 439          * @see          _remote_file, cache()
 440          */
 441         function use_dynamic_display( $bool )
 442         {
 443                 $this->_use_dynamic_display = $bool;
 444                 return true;
 445         }
 446
 447         /**
 448          * This Method avtually parses the XML data.
 449          *
 450          * @access    private
 451          * @author    Stefan Saasen <s@fase4.com>
 452          * @param     string $data    RDF File XML Data
 453          * @see       _clear_Items()
 454          */
 455         function _parse_xRDF( $data )
 456         {
 457                 $this->_clear_Items();
 458                 $xml_parser = xml_parser_create();
 459                 xml_set_object($xml_parser,$this);
 460                 xml_parser_set_option($xml_parser,XML_OPTION_CASE_FOLDING,0);
 461                 xml_set_element_handler($xml_parser, "_startElement", "_endElement");
 462                 xml_set_character_data_handler($xml_parser, "_parseData");
 463                 if (!xml_parse($xml_parser, trim($data))) {
 464                         $this->_throw_exception(sprintf("XML error: %s at line %d",
 465                         xml_error_string(xml_get_error_code($xml_parser)),
 466                         xml_get_current_line_number($xml_parser))."<br /><br />Exception in function parse_RDF().");
 467                 }
 468                 xml_parser_free($xml_parser);
 469         }
 470
 471
 472         /**
 473          * This Methods allows you to set the Refresh Time
 474          *
 475          * @access    public
 476          * @author    Stefan Saasen <s@fase4.com>
 477          * @param     int $seconds time files will be cached (in seconds).
 478          * @return       boolean
 479          * @see          _refresh
 480          */
 481         function set_refresh( $seconds )
 482         {
 483                 $this->_refresh = (time() - $seconds);
 484                 return true;
 485         }
 486
 487         function set_salt( $saltPara )
 488         {
 489                 $this->salt = $saltPara;
 490                 return true;
 491         }
 492
 493         /**
 494          * This Methods allows you to set the No. of <item>s to display
 495          *
 496          * @access    public
 497          * @param     int $int No of max <item>s
 498          * @author    Stefan Saasen <s@fase4.com>
 499          * @return       boolean
 500          * @see          _max_count, _endElement()
 501          */
 502         function set_max_item( $int )
 503         {
 504                 $this->_max_count = $int;
 505                 return true;
 506         }
 507
 508         /**
 509          * This Methods allows you to set the Cache Directory
 510          *
 511          * @access    public
 512          * @author    Stefan Saasen <s@fase4.com>
 513          * @param     string $dir Path to Directory.
 514          * @return       boolean
 515          * @see          _cache_dir
 516          */
 517         function set_CacheDir( $dir )
 518         {
 519                 if(substr($dir, -1) != "/") {
 520                         $dir = $dir."/";
 521                 }
 522                 $this->_cache_dir = $dir;
 523         }
 524
 525         /**
 526          * This Method displays Error Messages and terminates the Execution of the Script
 527          *
 528          * @access    private
 529          * @param     string $msg Message to display on failure
 530          * @author    Stefan Saasen <s@fase4.com>
 531          */
 532         function _throw_exception( $msg )
 533         {
 534                 $this->out .= "<div style=\"font-family: verdana, helvetica, arial, sans-serif;font-size:11px; color: #6699cc;margin-top:10px;margin-bottom:10px;\" align=\"center\">fase4 RDF Error: ".$msg."</div>";
 535                 return true;
 536         }
 537
 538         /**
 539          * This Method clears the Array containig the Items.
 540          *
 541          * @access    private
 542          * @author    Stefan Saasen <s@fase4.com>
 543          * @see       _item
 544          */
 545         function _clear_Items( ) {
 546                 $this->_item = array(
 547             'title'=>"",
 548             'link'=>"",
 549             'description'=>"",
 550             'url'=>"",
 551             'language'=>"",
 552             'pubDate'=>"",
 553             'lastBuildDate'=>"",
 554             'width'=>"",
 555             'height'=>""
 556             );
 557         }
 558         /**
 559          * This Method clears the Array containig the Channel Items.
 560          *
 561          * @access    private
 562          * @author    Stefan Saasen <s@fase4.com>
 563          * @see       _item
 564          */
 565         function _clear_cItems( ) {
 566                 $this->_citem = array(
 567             'title'=>"",
 568             'link'=>"",
 569             'description'=>"",
 570             'url'=>"",
 571             'language'=>"",
 572             'copyright'=>"",
 573             'managingEditor'=>"",
 574             'webMaster'=>"",
 575             'pubDate'=>"",
 576             'lastBuildDate'=>"",
 577             'category'=>"",
 578             'generator'=>"",
 579             'docs'=>"",
 580             'cloud'=>"",
 581             'ttl'=>"",
 582             'image'=>"",
 583             'textinput'=>"",
 584             'skipHours'=>"",
 585             'skipDays' =>"",
 586             'sitelink'=>"",
 587             'refid'=>"",
 588             'reflink'=>"",
 589                 );
 590         }
 591
 592         /**
 593          * XML Parser Start Element Handler
 594          *
 595          * @access    private
 596          * @author    Stefan Saasen <s@fase4.com>
 597          * @param     mixed  $parser a reference to the XML parser calling the handler.
 598          * @param     string $name contains the name of the element for which this handler is called.
 599          * @param     string $attrs contains an associative array with the element's attributes (if any).
 600          * @see          _get_ChannelData(), _clear_Items(), _type, _parse_mode, _depth, _tags, _cdepth, _ctags
 601          */
 602         function _startElement($parser, $name, $attrs) {
 603                 // We have to determine, which type of xml data we have to parse
 604                 if($name == "rss") {
 605                         $this->_type = "rss";
 606                 } elseif($name == "rdf:RDF" OR $name == "rdf") {
 607                         $this->_type = "rdf";
 608                 }
 609
 610
 611                 if ( $name == "channel" AND $this->_type != "rdf" ) {
 612                         $this->_parse_mode = "channel";
 613                 } elseif ( ($name=="item")
 614                 ||($name=="image")
 615                 ||($name=="textinput")
 616                 ||(($name=="channel") && ($this->_type != "rss")) ) {
 617                         if($this->_parse_mode=="channel") {
 618                                 $this->_get_ChannelData( $parser );
 619                         }
 620                         $this->_parse_mode = "all";
 621                 }
 622
 623                 if( !isset( $this->_depth[$this->get_parser_id($parser)] ) ) {
 624                         $this->_depth[$this->get_parser_id($parser)] = 0;
 625                 }
 626                 $this->_depth[$this->get_parser_id($parser)]++;
 627                 array_push($this->_tags, $name);
 628
 629                 if( !isset( $this->_cdepth[$this->get_parser_id($parser)] ) ) {
 630                         $this->_cdepth[$this->get_parser_id($parser)] = 0;
 631                 }
 632                 $this->_cdepth[$this->get_parser_id($parser)]++;
 633                 array_push($this->_ctags, $name);
 634         }   // END _startElement()
 635
 636         /**
 637          * Retrives the Channel Data in <rss> File
 638          *
 639          * @access    private
 640          * @author    Stefan Saasen <s@fase4.com>
 641          * @param     mixed  $parser a reference to the XML parser calling the handler.
 642          * @see          _output, _display_opt, _citem
 643          */
 644         function _get_ChannelData( $parser )
 645         {
 646                 $this->_citem["link"] = trim($this->_citem["link"]);
 647                 if (($this->_display_opt["sitelink"] == $this->_citem["link"]) && (!empty($this->_display_opt["reflink"])) && (!empty($this->_display_opt["refid"])))
 648                 {
 649                         $this->_citem["link"] .= $this->_display_opt["reflink"].$this->_display_opt["refid"];
 650                 }
 651
 652                 if( empty($this->_display_opt["channel"]) OR
 653                 $this->_display_opt["channel"] != "hidden") {
 654                         $this->_output .= "<tr><td>\n";
 655                         $this->_output .= "<table border=\"0\" width=\"100%\" class=\"fase4_rdf_meta\" cellspacing=\"5\" cellpadding=\"2\">\n";
 656                         $this->_output .= "<tr><td class=\"fase4_rdf_main_title\"><div class=\"fase4_rdf_main_title\">".htmlspecialchars($this->_citem["title"])."</div></td></tr>\n";
 657                         $this->_output .= "<tr><td class=\"fase4_rdf\">".strip_tags($this->_citem["description"], "<a>, <img>")."</td></tr>\n";
 658                         $this->_output .= "<tr><td>&nbsp;</td></tr>\n";
 659                         $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
 660                         if(isset($this->_display_opt["build"]) && $this->_display_opt["build"] != "hidden") {
 661                                 if($this->_citem["lastBuildDate"]){$this->_output .= "build: ". $this->_citem["lastBuildDate"]."<br />";}
 662                         }
 663                         if(isset($this->_display_opt["cache_update"]) && $this->_display_opt["cache_update"] != "hidden" && ( $_update = $this->get_cache_update_time()) ) {
 664                                 $this->_output .= "cache update: ".$_update."<br />\n";
 665                         }
 666                         $this->_output .= "<a href=\"".$this->_citem["link"]."\" ";
 667                         if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
 668                         $this->_output .= ">".$this->_cut_string($this->_citem["link"])."</a>";
 669                         $this->_output .= "</td></tr>\n";
 670                         $this->_output .= "<tr><td><hr noshade width=\"100%\" size=\"1\"></td></tr>\n";
 671                         $this->_output .= "</table></td></tr>";
 672                 }
 673                 $this->_array_channel = array(  "title"=>$this->_citem["title"],
 674                                                     "link"=>$this->_citem["link"],
 675                                                     "description"=>$this->_citem["description"],
 676                                                     "lastBuildDate"=>$this->_citem["lastBuildDate"]);
 677         }
 678
 679         /**
 680          * XML Parser End Element Handler
 681          *
 682          * @access    private
 683          * @author    Stefan Saasen <s@fase4.com>
 684          * @param     mixed  $parser a reference to the XML parser calling the handler.
 685          * @param     string $name contains the name of the element for which this handler is called.
 686          * @see          _clear_Items(), _type, _parse_mode, _depth, _tags, _cdepth, _ctags, _item, _output, _display_opt
 687          */
 688         function _endElement($parser, $name) {
 689                 array_pop($this->_tags);
 690                 $this->_depth[$this->get_parser_id($parser)]--;
 691                 array_pop($this->_ctags);
 692                 $this->_cdepth[$this->get_parser_id($parser)]--;
 693                 $this->_item["link"] = trim($this->_item["link"]);
 694                 if ((!empty($this->_display_opt["refid"])) && (!empty($this->_item["link"])))
 695                 {
 696                         if (!ereg("refid=", $this->_item["link"])) $this->_item["link"] .= "?refid=" . $this->_display_opt["refid"];
 697                 }
 698                 switch ($name) {
 699                         case "item":
 700                                 if(empty($this->_max_count) OR $this->_item_count < $this->_max_count) {
 701                                         if($this->_item["title"] != $this->_item["description"]
 702                                         AND $this->_item["description"]) {
 703
 704                                                 // word-wrapping added by Roland Haeder <webmaster@mxchange.org>
 705                                                 if (($this->_word_wrap > 0) && (strlen($this->_item["description"]) > $this->_word_wrap))
 706                                                 {
 707                                                         // Switch off _use_nl2br
 708                                                         $this->_use_nl2br = false;
 709                                                         // First remove all \n
 710                                                         $this->_item["description"] = str_replace("\n", ' ', $this->_item["description"]);
 711                                                         // Wrap with <br />\n
 712                                                         $this->_item["description"] = wordwrap($this->_item["description"], $this->_word_wrap, "*<br>\n");
 713                                                 }
 714                                                 elseif (($this->_word_wrap == 0) && (!$this->_use_nl2br))
 715                                                 {
 716                                                         // Strip tags out instead when word-wrap is disabled
 717                                                         $this->_item["description"] = strip_tags($this->_item["description"], "<a>, <img>");
 718                                                 }
 719
 720                                                 // nl2br added by Roland Haeder <webmaster@mxchange.org>
 721                                                 if ($this->_use_nl2br) $this->_item["description"] = nl2br($this->_item["description"]);
 722
 723                                                 $this->_output .= "<tr><td class=\"fase4_rdf_title\"><div class=\"fase4_rdf_title\"><a class=\"fase4_rdf_title\" href=\"".$this->_item["link"]."\" ";
 724                                                 if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
 725                                                 $this->_output .= ">".strip_tags($this->_item["title"], "<a>, <img>")."</a> (".$this->_item["pubDate"].")</div></td></tr>\n";
 726                                                 $this->_output .= "<tr><td class=\"fase4_rdf\">".$this->_item["description"]."</td></tr>\n";
 727                                                 // we just display the <hr> if there is a description
 728                                                 $this->_output .= "<tr><td><hr noshade=\"noshade\" size=\"1\" /></td></tr>\n";
 729                                         } else {
 730                                                 $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
 731                                                 $this->_output .= "<a href=\"".$this->_item["link"]."\" ";
 732                                                 if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
 733                                                 $this->_output .= ">".$this->_item["title"]."</a></td></tr>\n";
 734                                         }
 735                                         $this->_array_item[] = array(   "title"=>$this->_item["title"],
 736                                                         "link"=>$this->_item["link"],
 737                                                         "description"=>$this->_item["description"]);
 738                                         ++$this->_item_count;
 739                                 }
 740                                 $this->_clear_Items();
 741                                 break;
 742                         case "image":
 743                                 if(isset($this->_display_opt["image"]) && ($this->_display_opt["image"] != "hidden") && $this->_item["url"]) {
 744                                         $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
 745                                         $this->_output .= "<a href=\"".$this->_item["link"]."\" ";
 746                                         if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
 747                                         $this->_output .= "><img src=\"".$this->_item["url"]."\"";
 748                                         if(isset($this->_item["width"]) && isset($this->_item["height"])) {
 749                                                 $this->_output .= " width=\"".$this->_item["width"]."\" height=\"".$this->_item["height"]."\"";
 750                                         }
 751                                         $this->_output .= " alt=\"".$this->_item["title"]."\" border=\"0\" /></a></td></tr>\n";
 752
 753                                         $this->_array_image[] = array(  "url"=>$this->_item["url"],
 754                                                     "link"=>$this->_item["link"],
 755                                                     "width"=>$this->_item["width"],
 756                                                     "height"=>$this->_item["height"]);
 757                                         $this->_clear_Items();
 758                                 } elseif( isset($this->_display_opt["image"] ) && ($this->_display_opt["image"] == "hidden") ) {
 759                                         $this->_clear_Items();
 760                                 }
 761
 762                                 break;
 763                         case "channel":
 764                                 if(isset($this->_display_opt["channel"]) AND $this->_display_opt["channel"] != "hidden" AND $this->_item["title"] != '') {
 765                                         $this->_output .= "<tr><td>\n";
 766                                         $this->_output .= '<table border="0" width="100%" class="fase4_rdf_meta" cellspacing="5" cellpadding="2">'."\n";
 767                                         $this->_output .= "<tr><td class=\"fase4_rdf\"><div class=\"fase4_rdf_title\">".htmlspecialchars($this->_item["title"])."</div></td></tr>\n";
 768                                         $this->_output .= "<tr><td class=\"fase4_rdf\">".strip_tags($this->_item["description"], "<a>, <img>")."</td></tr>\n";
 769                                         $this->_output .= "<tr><td>&nbsp;</td></tr>\n";
 770                                         $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
 771                                         if($this->_display_opt["build"] != "hidden") {
 772                                                 if($this->_item["lastBuildDate"]){$this->_output .= "build: ". $this->_item["lastBuildDate"]."<br />";}
 773                                         }
 774                                         if($this->_display_opt["cache_update"] != "hidden" && ( $_update = $this->get_cache_update_time()) ) {
 775                                                 $this->_output .= "cache update: ".$_update."<br />\n";
 776                                         }
 777                                         $this->_output .= "<a href=\"".$this->_item["link"]."\" ";
 778                                         if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
 779                                         $this->_output .= ">".$this->_cut_string($this->_item["link"])."</a>\n";
 780                                         $this->_output .= "</td></tr>\n";
 781                                         $this->_output .= "</table></td></tr>\n";
 782                                 }
 783                                 $this->_array_channel = array(  "title"=>$this->_item["title"],
 784                                                     "link"=>$this->_item["link"],
 785                                                     "description"=>$this->_item["description"],
 786                                                     "lastBuildDate"=>$this->_item["lastBuildDate"]);
 787                                 $this->_clear_Items();
 788                                 $this->_clear_cItems();
 789                                 break;
 790                         case "textinput":
 791                                 if(isset($this->_display_opt["textinput"]) && ($this->_display_opt["textinput"] != "hidden") && $this->_item["name"] && $this->_item["link"]) {
 792                                         $this->_output .= "<tr><td class=\"fase4_rdf\">\n";
 793                                         $this->_output .= "<form action=\"".$this->_item["link"]."\" ";
 794                                         if(isset($this->_link_target)) { $this->_output .= "target=\"".$this->_link_target."\" "; }
 795                                         $this->_output .= "method=\"get\">\n";
 796                                         $this->_output .= "<div class=\"fase4_rdf_title\">".$this->_item["title"]."</div>";
 797                                         $this->_output .= strip_tags($this->_item["description"], "<a>, <img>")."<br><br>\n";
 798                                         $this->_output .= "<input class=\"fase4_rdf_input\" type=\"text\" name=\"".$this->_item["name"]."\">&nbsp;\n";
 799                                         $this->_output .= "<input class=\"fase4_rdf_input\" type=\"submit\" value=\"go\">";
 800                                         $this->_output .= "</form>\n";
 801                                         $this->_output .= "</td></tr>\n";
 802                                         $this->_array_textinput = array(    "title"=>$this->_item["title"],
 803                                                         "name"=>$this->_item["name"],
 804                                                         "link"=>$this->_item["link"],
 805                                                         "description"=>$this->_item["description"]);
 806                                         $this->_clear_Items();
 807                                 } elseif( isset($this->_display_opt["textinput"]) && ($this->_display_opt["textinput"] == "hidden") ) {
 808                                         $this->_clear_Items();
 809                                 }
 810
 811                                 break;
 812                 }
 813         }
 814
 815         /**
 816          * This Method returns the data from the <channel /> paragraph.
 817          *
 818          * @access    public
 819          * @author    Stefan Saasen <s@fase4.com>
 820          * @return    array
 821          * @see          _array_channel
 822          */
 823         function get_array_channel( )
 824         {
 825                 return $this->_array_channel;
 826         }
 827
 828         /**
 829          * This Method returns the data from each <item /> paragraph.
 830          *
 831          * @access    public
 832          * @author    Stefan Saasen <s@fase4.com>
 833          * @return    array
 834          * @see          _array_item
 835          */
 836         function get_array_item( )
 837         {
 838                 return $this->_array_item;
 839         }
 840
 841         /**
 842          * This Method returns the data from <textinput />.
 843          *
 844          * @access    public
 845          * @author    Stefan Saasen <s@fase4.com>
 846          * @return    array
 847          * @see          _array_textinput
 848          */
 849         function get_array_textinput( )
 850         {
 851                 return $this->_array_textinput;
 852         }
 853
 854         /**
 855          * Getter for parser id from resource
 856          *
 857          * @access private
 858          * @author      Roland Haeder <webmaster@mxchange.org>
 859          * @return      int
 860          */
 861         function get_parser_id ($parser) {
 862                 // Default is zero
 863                 $id = 0;
 864
 865                 // Is it a resource?
 866                 if (is_resource($parser)) {
 867                         // Cast the resource into id
 868                         $id = (int) $parser;
 869                 } // END - if
 870
 871                 // Return the id
 872                 return $id;
 873         }
 874
 875         /**
 876          * This Method returns the data from <image />.
 877          *
 878          * @access    public
 879          * @author    Stefan Saasen <s@fase4.com>
 880          * @return    array
 881          * @see          _array_image
 882          */
 883         function get_array_image( )
 884         {
 885                 return $this->_array_image;
 886         }
 887
 888         /**
 889          * XML Parser Data Handler
 890          *
 891          * @access    private
 892          * @author    Stefan Saasen <s@fase4.com>
 893          * @param     mixed  $parser a reference to the XML parser calling the handler.
 894          * @param     string $text contains the character data as a string.
 895          * @see          _parse_mode, _item, _tags, _depth, _citem, _ctags, _cdepth
 896          */
 897         function _parseData($parser, $text)
 898         {
 899                 // Deocing mode added by Roland Haeder <webmaster@mxchange.org>
 900                 switch ($this->_decoding_mode)
 901                 {
 902                         case "utf8_decode":
 903                                 $text = utf8_decode($text);
 904                                 break;
 905
 906                         case "htmlentities":
 907                                 $text = htmlentities($text);
 908                                 break;
 909                 }
 910
 911                 $clean = preg_replace("/\s/", "", $text);
 912                 if ($clean) {
 913                         $text = preg_replace("/^\s+/", "", $text)."\n";
 914                         if($this->_parse_mode == "all") {
 915                                 if ( isset($this->_item[$this->_tags[$this->_depth[$this->get_parser_id($parser)]]]) &&
 916                                 $this->_item[$this->_tags[$this->_depth[$this->get_parser_id($parser)]]] ) {
 917                                         $this->_item[$this->_tags[$this->_depth[$this->get_parser_id($parser)]]] .= $text;
 918                                 } else {
 919                                         $this->_item[$this->_tags[$this->_depth[$this->get_parser_id($parser)]]] = $text;
 920                                 }
 921                         } elseif (isset($this->_parse_mode) && $this->_parse_mode == "channel") {
 922                                 if ( isset($this->_citem[$this->_ctags[$this->_cdepth[$this->get_parser_id($parser)]]]) ) {
 923                                         $this->_citem[$this->_ctags[$this->_cdepth[$this->get_parser_id($parser)]]] .= $text;
 924                                 } else {
 925                                         $this->_citem[$this->_ctags[$this->_cdepth[$this->get_parser_id($parser)]]] = $text;
 926                                 }
 927                         }
 928                 }
 929         }
 930
 931         /**
 932          * This Method allows you to choose if specific Parameters are displayed or not. These are:
 933          * image, channel, textinput, build and cache_update. If set to "hidden" those elements won't be displayed.
 934          *
 935          * @access    public
 936          * @author    Stefan Saasen <s@fase4.com>
 937          * @param     array  $options
 938          * @see          _display_opt
 939          */
 940         function set_Options( $options = "" )
 941         {
 942                 if(is_array( $options )) {
 943                         $this->_display_opt = $options;
 944                         return true;
 945                 } else {
 946                         unset($this->_display_opt);
 947                         return false;
 948                 }
 949         }
 950
 951         /**
 952          * This Method allows you to define the width of the table that holds the representation of the rdf/rss file.
 953          *
 954          * @access    public
 955          * @author    Stefan Saasen <s@fase4.com>
 956          * @param     int  $width  attribute width in tag <table>
 957          * @see          _table_width
 958          */
 959         function set_table_width( $width = 400 )
 960         {
 961                 $this->_table_width = $width;
 962                 return true;
 963         }
 964
 965         /**
 966          * This Method returns an assocative Array with available Options.
 967          *
 968          * The Keys are the Name of the Options to be set.
 969          * The Values are  short Description of available Options.
 970          *
 971          * @access    public
 972          * @author    Stefan Saasen <s@fase4.com>
 973          * @return    array  $options
 974          * @see          _display_opt
 975          */
 976         function get_Options()
 977         {
 978                 $options = array(   "image"=>"If 'image' is set to \"hidden\" no image provided by the RDF Publisher will be displayed.",
 979                             "channel"=>"If 'channel' is set to \"hidden\" the Channel Meta Data (i.e the Title and the short description regarding the RDF Publisher will not be displayed",
 980                             "textinput"=>"If set to \"hidden\" no Input Form will be displayed",
 981                             "build"=>"If set to \"hidden\" the Build Date (if provided) of the RDF File will not be displayed",
 982                             "cache_update"=>"If set to \"hidden\" the Update Date/Time of the cached Rdf File will not be displayed");
 983                 return $options;
 984         }
 985
 986         /**
 987          * This Method returns the Content of the RDF File in one string. The String actually holds the whole XML Document.
 988          *
 989          * @access    public
 990          * @author    Stefan Saasen <s@fase4.com>
 991          * @param     string $rdf    RDF File (Location)
 992          * @return    string XML Presentation of parsed RDF File
 993          * @see          _cached_file, _remote_file, _cache_dir, _refresh, _update_cache()
 994          */
 995         function cache()
 996         {
 997                 // checks if the cache directory already exists
 998                 // if not, the cache directory will be created
 999                 if(!$this->_cache_dir_ok) {
1000                         $this->_create_cache_dir();
1001                 }
1002                 if($this->_use_dynamic_display == true) {
1003                         $this->_cached_file = md5("dynamic".$this->salt.$this->_remote_file);
1004                         $this->_cache_type = "normal";
1005                 } else {
1006                         $this->_cached_file = md5($this->salt.$this->_remote_file);
1007                         $this->_cache_type = "fast";
1008                 }
1009
1010                 $_cache_f = $this->_cache_dir.$this->_cached_file;
1011
1012                 if ( (!file_exists($_cache_f)) || (filemtime($_cache_f) < $this->_refresh) || (filesize($_cache_f) == 0)) {
1013                         // We have to parse the remote file
1014                         $this->_use_cached_file = false;
1015                         // --> we want to provide proper Information for Use in
1016                         // get_cache_update_time()
1017                         clearstatcache();
1018                         if($this->_use_dynamic_display == true) {
1019                                 $_rdf = @implode(" ", $this->_rdf_data()); // -> proxy
1020                                 if(!$_rdf) {
1021                                         $this->_throw_exception( $this->_remote_file." is not available" );
1022                                 }
1023                                 $this->_parse_xRDF( $_rdf );
1024                                 $this->_update_cache( $_rdf );
1025                                 $data = $this->_output;
1026                         } else {
1027                                 $_rdf = @implode(" ", $this->_rdf_data()); // -> proxy
1028                                 if(!$_rdf) {
1029                                         $this->_throw_exception( $this->_remote_file." is not available" );
1030                                 }
1031                                 $this->_parse_xRDF( $_rdf );
1032                                 $this->_update_cache( $this->_output );
1033                                 $data = $this->_output;
1034                         }
1035                 } else {
1036                         // we can use the cached file
1037                         $this->_use_cached_file = true;
1038                         if($this->_use_dynamic_display == true) {
1039                                 $this->_parse_xRDF( implode(" ", file($_cache_f)) );
1040                                 $data = $this->_output;
1041                         } else {
1042                                 $data = @implode(" ", file($_cache_f));
1043                         }
1044                 }
1045                 return trim($data);
1046         }   // END cache()
1047
1048         /**
1049          * This Methods creates the Cache Directory if the specified Directory does not exist.
1050          *
1051          * @access    private
1052          * @author    Stefan Saasen <s@fase4.com>
1053          * @param     string $dir Path to Directory.
1054          * @return       boolean
1055          * @see          _cache_dir, _cache_dir_ok
1056          */
1057         function _create_cache_dir()
1058         {
1059                 $path = "";
1060                 if(!@is_dir($this->_cache_dir)) {
1061                         $arr = explode("/", $this->_cache_dir);
1062                         $c = count($arr);
1063                         if($arr[0]=="") {
1064                                 $path = "/";
1065                         }
1066                         for($i = 0;$i<$c;$i++)
1067                         {
1068                                 if($arr[$i]!="") {
1069                                         $path .= $arr[$i]."/";
1070                                         if(!@is_dir($path)) {
1071                                                 if(!@mkdir($path, 0777)) {
1072                                                         $this->_throw_exception("failed to create directory:<b>".$this->_cache_dir."</b>.<br /><br />Exception on Line: ".__LINE__);
1073                                                         return false;
1074                                                 }
1075                                         }
1076                                 }
1077                         }
1078                         $this->_cache_dir_ok = true;
1079                         return true;
1080                 } else {
1081                         $this->_cache_dir_ok = true;
1082                         return true;
1083                 }
1084         }   // END _create_cache_dir()
1085
1086         /**
1087          * This Method updates the cached RDF Files and synchronises them with their remote Counterparts.
1088          *
1089          * @access    private
1090          * @author    Stefan Saasen <s@fase4.com>
1091          * @param     string $rdf    RDF File (Location)
1092          * @see          _cache_dir, _cached_file, _throw_exception()
1093          */
1094         function _update_cache( $content = "" )
1095         {
1096                 $_local = @fopen( $this->_cache_dir.$this->_cached_file, 'w' );
1097                 if(!$_local) {
1098                         $this->_throw_exception( "Cannot open ".$this->_cached_file."<br /><br />Exception at Line: ".__LINE__ );
1099                         return false;
1100                 }
1101                 if (fwrite( $_local, $content) === false) {
1102                         $this->_throw_exception( "Cannot write to ".$this->_cached_file."<br /<br />Exeception at Line: ".__LINE__);
1103                         return false;
1104                 }
1105                 fclose( $_local );
1106                 @chmod( $this->_cache_dir.$this->_cached_file, 0666);
1107                 return true;
1108         }   // END _update_cache()
1109
1110         /**
1111          * This Method returns the Date/Time of last Cache Update of the actually parsed RDF File.
1112          *
1113          * @access    public
1114          * @author    Stefan Saasen <s@fase4.com>
1115          * @return       string Date/Time of last Update
1116          * @see          _cache_dir, _cached_file
1117          */
1118         function get_cache_update_time()
1119         {
1120                 return (file_exists($this->_cache_dir.$this->_cached_file))?date("d.m.Y H:i:s", filemtime($this->_cache_dir.$this->_cached_file)):"Cachemiss";
1121         }   // END get_cache_update_time()
1122
1123         /**
1124          * This Method returns the Type of Cache that was used ('normal' or 'fast')
1125          *
1126          * @access    public
1127          * @author    Stefan Saasen <s@fase4.com>
1128          * @param     string $rdf    RDF File (Location)
1129          * @return    string Displays RDF Content ( using _display() )
1130          * @see          _remote_file, cache()
1131          */
1132         function get_CacheType()
1133         {
1134                 return $this->_cache_type;
1135         }
1136
1137         /**
1138          * Returns true if cached file was used, otherwise false
1139          *
1140          * @access    public
1141          * @author    Stefan Saasen <s@fase4.com>
1142          * @return    array  $options
1143          * @see          _use_cached_file
1144          */
1145         function is_cachedFile()
1146         {
1147                 return $this->_use_cached_file;
1148         }
1149
1150         /**
1151          * This Method deletes all the cached Files.
1152          *
1153          * Please keep in mind to use this method just as a 'manual garbage collection'
1154          * You should cache the rss/rdf files locally to avoid unnecessary traffic.
1155          * (Both for your visitors and the Publisher)
1156          *
1157          * @access    public
1158          * @author    Stefan Saasen <s@fase4.com>
1159          * @see          _cache_dir
1160          */
1161         function clear_cache()
1162         {
1163                 $dir = dir($this->_cache_dir);
1164                 while($file=$dir->read()) {
1165                         // Exclude directories
1166                         if (is_file($dir->path.$file) && substr($file, -6, 6) != ".cache" && substr($file, -4, 4) != ".log")  {
1167                                 if(!@unlink($dir->path.$file)) {
1168                                         $this->_throw_exception("Unable to unlink ".$dir->path.$file."<br />\n<br />\nException at Line: ".__LINE__ );
1169                                         return false;
1170                                 } // END - if
1171                         } // END - if
1172                 } // END - while
1173                 $dir->close();
1174                 return true;
1175         }   // END clear_cache()
1176
1177         /**
1178          * Cuts the String $string after $str_len and adds "... "
1179          *
1180          * @access   private
1181          * @param    string  $string String to be shortened
1182          * @param    int     $str_len length of the returned String (overall length including "... ")
1183          * @return   string  Cut String
1184          */
1185         function _cut_string( $string, $str_len = "30" )
1186         {
1187                 if(strlen(trim($string))>$str_len) {
1188                         $string = substr( trim($string) , 0, $str_len - 4);
1189                         $string .= " ...";
1190                 }
1191                 return $string;
1192         }   // END _cut_string()
1193
1194         /**
1195          * this Method implements simple Garbage Collection
1196          *
1197          * @access    private
1198          * @author    Stefan Saasen <s@fase4.com>
1199          * @see          _cache_dir, gc_probability, gc_maxlifetime
1200          */
1201         function _garbage_collection()
1202         {
1203                 srand((double) microtime() * 1000000);
1204                 if (mt_rand(1, 100) <= $this->gc_probability) {
1205                         $dir = dir($this->_cache_dir);
1206                         while($file=$dir->read()) {
1207                                 if (is_file($dir->path.$file) && substr($file, -6, 6) != ".cache" && substr($file, -4, 4) != ".log" && filemtime($dir->path.$file) <= time() - $this->_refresh )  {
1208                                         @unlink($dir->path.$file);
1209                                 } // END - if
1210                         }
1211                         $dir->close();
1212                 }   // END if
1213         }
1214
1215         /* ==== Proxy/Auth methods ==== */
1216
1217         /**
1218          * this method sets a proxy server
1219          *
1220          * @access    public
1221          * @param     string $phost Proxy Host
1222          * @param     string $pport Prox Port
1223          * @author    Marco Kraus <marco.kraus@siemens.com>
1224          */
1225         function set_proxy($phost, $pport)
1226         {
1227                 $this->_use_proxy = true;
1228
1229                 if ($phost != '')
1230                 $this->_phost = $phost;
1231
1232                 if ($pport != '')
1233                 $this->_pport = $pport;
1234         }
1235
1236         /**
1237          * this method sets a proxy server authentification
1238          *
1239          * @access    public
1240          * @param     string $pname Username
1241          * @param     string $ppaswd Password
1242          * @author    Marco Kraus <marco.kraus@siemens.com>
1243          */
1244         function set_proxy_auth( $pname, $ppasswd )
1245         {
1246                 $this->_use_proxy_auth = true;
1247
1248                 if ($pname != '')
1249                 $this->_pname = $pname;
1250
1251                 if ($ppasswd != '')
1252                 $this->_ppasswd = $ppasswd;
1253         }
1254
1255
1256         /**
1257          * gets _remote_file into an array
1258          *
1259          * needed, cause if you use a proxy, you have to open
1260          * a raw-tcp-socket to get the data
1261          *
1262          * @access    private
1263          * @author    Marco Kraus <Marco.Kraus@siemens.com>
1264          * @return array
1265          * @see _use_proxy, cache()
1266          */
1267         function _rdf_data()
1268         {
1269                 if ( $this->_use_proxy == true )
1270                 {
1271                         // we need a raw socket here to connect to proxy
1272                         $fp = fsockopen($this->_phost,$this->_pport);
1273
1274                         if (!$fp) {
1275                                 $this->_throw_exception( $this->_remote_file." is not available with proxy" );
1276                         } else {
1277                                 if ( $this->_use_proxy_auth == true ) {
1278                                         fputs($fp, "GET ".$this->_remote_file." HTTP/1.0\r\nUser-Agent: Fase4 RDF-Reader/1.40 modified by Quix0r\r\n\r\n");
1279                                 } else {
1280                                         fputs($fp, "GET ".$this->_remote_file." HTTP/1.0\r\nUser-Agent: Fase4 RDF-Reader/1.40 modified by Quix0r\r\nProxy-Authorization: Basic ".base64_encode("$this->_pname:$this->_ppasswd") ."\r\n\r\n");
1281                                 }
1282                         }
1283
1284
1285                         for ( $i = 0; !feof ($fp) ; $i++)
1286                         {
1287                                 $usable_data[$i] = "";
1288                                 $usable_data[$i] = fgets($fp,4096);
1289
1290                                 // PARSE HEADER ---- first line has to be <?xml, second rdf or rss, and third is blank
1291
1292                                 // strstr did not fit (ask Rasmus why), so we compare each character
1293                                 if ( ($usable_data[$i][0] == "<" ) &&
1294                                 ($usable_data[$i][1] == "?" ) &&
1295                                 ($usable_data[$i][2] == "x" ) &&
1296                                 ($usable_data[$i][3] == "m" ) &&
1297                                 ($usable_data[$i][4] == "l" ) ) {
1298                                         $usable_data[0] = $usable_data[$i]; // save current field
1299                                         $i = 1; // just reset array to start
1300                                 }
1301
1302                                 // there seems to be proxystuff after the <?xml....we delete this
1303                                 if ( (
1304                                 ($usable_data[$i][0] == "<" ) &&
1305                                 ($usable_data[$i][1] == "r" ) &&
1306                                 ($usable_data[$i][2] == "d" ) &&
1307                                 ($usable_data[$i][3] == "f" ) &&
1308                                 ($usable_data[$i][4] == ":" )
1309                                 )
1310                                 ||
1311                                 (
1312                                 ($usable_data[$i][0] == "<" ) &&
1313                                 ($usable_data[$i][1] == "r" ) &&
1314                                 ($usable_data[$i][2] == "s" ) &&
1315                                 ($usable_data[$i][3] == "s" )
1316                                 )
1317                                 ) {
1318
1319                                         $usable_data[1] = $usable_data[$i]; // save current field
1320                                         $usable_data[2] = "\n";
1321                                         $i = 2; // just reset array to start
1322                                 }
1323                         }
1324
1325                         fclose($fp);
1326                         return $usable_data;
1327                 } else {
1328                         if (substr($this->_remote_file, 0, 7) != "http://") {
1329                                 $this->_throw_exception( "Cannot find http:// in ".$this->_remote_file."!" );
1330                                 return "";
1331                         } else {
1332                                 // Extract host information
1333                                 $host = substr($this->_remote_file, 7);
1334                                 // Extract the GET part
1335                                 $get = "/";
1336                                 if (strpos($host, "/") > 0) {
1337                                         $get = substr($host, strpos($host, "/"));
1338                                         $host = substr($host, 0, strpos($host, "/"));
1339                                 }
1340                                 // Extract port
1341                                 $port = "80";
1342                                 if (strpos($host, ":") > 0) {
1343                                         $port = substr($host, (strpos($host, ":") + 1));
1344                                         $host = substr($host, 0, (strpos($host, ":") - 1));
1345                                 }
1346
1347                                 // Start connection to server
1348                                 $fp = fsockopen($host, $port);
1349                                 if (!$fp) {
1350                                         $this->_throw_exception( $this->_remote_file." is maybe not available." );
1351                           return "";
1352                                 }
1353                                 // Repare request line
1354                                 $request = sprintf("GET %s HTTP/1.0\r\nHost: %s\r\nUser-Agent: Fase4 RDF-Reader/1.40 modified by Quix0r\r\n\r\n", $get, $host);
1355                                 // Send request out
1356                                 fputs($fp, $request);
1357                                 $reply = ""; $isContent = false; $dummy = "";
1358                                 // Read reply
1359                                 $i=0;
1360                                 while ( !feof($fp) ) {
1361                                         $read = trim(fgets($fp, 4096));
1362                                         if (substr($read, 0, 5) == "<?xml" || $isContent) {
1363                                                 // Add content
1364                                                 $reply[] = $read;
1365                                                 $isContent = true;
1366                                         } else {
1367                                                 // Put in dummy
1368                                                 $dummy[] = $read;
1369                                         }
1370                                         $i++;
1371                                 }
1372                                 if ((count($dummy) > 0) && (count($reply) == 0) && (!$isContent)) {
1373                                         // Transfer content from dummy
1374                                         $reply = $content;
1375                                 }
1376                                 fclose($fp);
1377                                 //die(htmlentities($reply));
1378                                 return $reply;
1379                         }
1380                 }
1381         }    // END _rdf_data()
1382 }   // END class
1383 ?>