This file is indexed.

/usr/share/php/magpierss/rss_parse.inc is in libphp-magpierss 0.72-11.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
<?php

/**
* Project:     MagpieRSS: a simple RSS integration tool
* File:        rss_parse.inc  - parse an RSS or Atom feed
*               return as a simple object.
*
* Handles RSS 0.9x, RSS 2.0, RSS 1.0, and Atom 0.3
*
* The lastest version of MagpieRSS can be obtained from:
* http://magpierss.sourceforge.net
*
* For questions, help, comments, discussion, etc., please join the
* Magpie mailing list:
* magpierss-general@lists.sourceforge.net
*
* @author           Kellan Elliott-McCrea <kellan@protest.net>
* @version          0.7a
* @license          GPL
*
*/

define('RSS', 'RSS');
define('ATOM', 'Atom');

require_once (MAGPIE_DIR . 'rss_utils.inc');

/**
* Hybrid parser, and object, takes RSS as a string and returns a simple object.
*
* see: rss_fetch.inc for a simpler interface with integrated caching support
*
*/
class MagpieRSS {
    var $parser;
    
    var $current_item   = array();  // item currently being parsed
    var $items          = array();  // collection of parsed items
    var $channel        = array();  // hash of channel fields
    var $textinput      = array();
    var $image          = array();
    var $feed_type;
    var $feed_version;
    var $encoding       = '';       // output encoding of parsed rss
    
    var $_source_encoding = '';     // only set if we have to parse xml prolog
    
    var $ERROR = "";
    var $WARNING = "";
    
    // define some constants
    
    var $_CONTENT_CONSTRUCTS = array('content', 'summary', 'info', 'title', 'tagline', 'copyright');
    var $_KNOWN_ENCODINGS    = array('UTF-8', 'US-ASCII', 'ISO-8859-1');

    // parser variables, useless if you're not a parser, treat as private
    var $stack              = array(); // parser stack
    var $inchannel          = false;
    var $initem             = false;
    var $incontent          = false; // if in Atom <content mode="xml"> field 
    var $intextinput        = false;
    var $inimage            = false;
    var $current_namespace  = false;
    

    /**
     *  Set up XML parser, parse source, and return populated RSS object..
     *   
     *  @param string $source           string containing the RSS to be parsed
     *
     *  NOTE:  Probably a good idea to leave the encoding options alone unless
     *         you know what you're doing as PHP's character set support is
     *         a little weird.
     *
     *  NOTE:  A lot of this is unnecessary but harmless with PHP5 
     *
     *
     *  @param string $output_encoding  output the parsed RSS in this character 
     *                                  set defaults to ISO-8859-1 as this is PHP's
     *                                  default.
     *
     *                                  NOTE: might be changed to UTF-8 in future
     *                                  versions.
     *                               
     *  @param string $input_encoding   the character set of the incoming RSS source. 
     *                                  Leave blank and Magpie will try to figure it
     *                                  out.
     *                                  
     *                                   
     *  @param bool   $detect_encoding  if false Magpie won't attempt to detect
     *                                  source encoding. (caveat emptor)
     *
     */
    function MagpieRSS ($source, $output_encoding='ISO-8859-1', 
                        $input_encoding=null, $detect_encoding=true) 
    {   
        # if PHP xml isn't compiled in, die
        #
        if (!function_exists('xml_parser_create')) {
            $this->error( "Failed to load PHP's XML Extension. " . 
                          "http://www.php.net/manual/en/ref.xml.php",
                           E_USER_ERROR );
        }
        
        list($parser, $source) = $this->create_parser($source, 
                $output_encoding, $input_encoding, $detect_encoding);
        
        
        if (!is_resource($parser)) {
            $this->error( "Failed to create an instance of PHP's XML parser. " .
                          "http://www.php.net/manual/en/ref.xml.php",
                          E_USER_ERROR );
        }

        
        $this->parser = $parser;
        
        # pass in parser, and a reference to this object
        # setup handlers
        #
        xml_set_object( $this->parser, $this );
        xml_set_element_handler($this->parser, 
                'feed_start_element', 'feed_end_element' );
                        
        xml_set_character_data_handler( $this->parser, 'feed_cdata' ); 
    
        $status = xml_parse( $this->parser, $source );
        
        if (! $status ) {
            $errorcode = xml_get_error_code( $this->parser );
            if ( $errorcode != XML_ERROR_NONE ) {
                $xml_error = xml_error_string( $errorcode );
                $error_line = xml_get_current_line_number($this->parser);
                $error_col = xml_get_current_column_number($this->parser);
                $errormsg = "$xml_error at line $error_line, column $error_col";

                $this->error( $errormsg );
            }
        }
        
        xml_parser_free( $this->parser );

        $this->normalize();
    }
    
    function feed_start_element($p, $element, &$attrs) {
        $el = $element = strtolower($element);
        $attrs = array_change_key_case($attrs, CASE_LOWER);
        
        // check for a namespace, and split if found
        $ns = false;
        if ( strpos( $element, ':' ) ) {
            list($ns, $el) = split( ':', $element, 2); 
        }
        if ( $ns and $ns != 'rdf' ) {
            $this->current_namespace = $ns;
        }
            
        # if feed type isn't set, then this is first element of feed
        # identify feed from root element
        #
        if (!isset($this->feed_type) ) {
            if ( $el == 'rdf' ) {
                $this->feed_type = RSS;
                $this->feed_version = '1.0';
            }
            elseif ( $el == 'rss' ) {
                $this->feed_type = RSS;
                $this->feed_version = $attrs['version'];
            }
            elseif ( $el == 'feed' ) {
                $this->feed_type = ATOM;
                $this->feed_version = $attrs['version'];
                $this->inchannel = true;
            }
            return;
        }
    
        if ( $el == 'channel' ) 
        {
            $this->inchannel = true;
        }
        elseif ($el == 'item' or $el == 'entry' ) 
        {
            $this->initem = true;
            if ( isset($attrs['rdf:about']) ) {
                $this->current_item['about'] = $attrs['rdf:about']; 
            }
        }
        
        // if we're in the default namespace of an RSS feed,
        //  record textinput or image fields
        elseif ( 
            $this->feed_type == RSS and 
            $this->current_namespace == '' and 
            $el == 'textinput' ) 
        {
            $this->intextinput = true;
        }
        
        elseif (
            $this->feed_type == RSS and 
            $this->current_namespace == '' and 
            $el == 'image' ) 
        {
            $this->inimage = true;
        }
        
        # handle atom content constructs
        elseif ( $this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) )
        {
            // avoid clashing w/ RSS mod_content
            if ($el == 'content' ) {
                $el = 'atom_content';
            }
            
            $this->incontent = $el;
            
            
        }
        
        // if inside an Atom content construct (e.g. content or summary) field treat tags as text
        elseif ($this->feed_type == ATOM and $this->incontent ) 
        {
            // if tags are inlined, then flatten
            $attrs_str = join(' ', 
                    array_map('map_attrs', 
                    array_keys($attrs), 
                    array_values($attrs) ) );
            
            $this->append_content( "<$element $attrs_str>"  );
                    
            array_unshift( $this->stack, $el );
        }
        
        // Atom support many links per containging element.
        // Magpie treats link elements of type rel='alternate'
        // as being equivalent to RSS's simple link element.
        //
        elseif ($this->feed_type == ATOM and $el == 'link' ) 
        {
            if ( isset($attrs['rel']) and $attrs['rel'] == 'alternate' ) 
            {
                $link_el = 'link';
            }
            else {
                $link_el = 'link_' . $attrs['rel'];
            }
            
            $this->append($link_el, $attrs['href']);
        }
        // set stack[0] to current element
        else {
            array_unshift($this->stack, $el);
        }
    }
    

    
    function feed_cdata ($p, $text) {
        if ($this->feed_type == ATOM and $this->incontent) 
        {
            $this->append_content( $text );
        }
        else {
            $current_el = join('_', array_reverse($this->stack));
            $this->append($current_el, $text);
        }
    }
    
    function feed_end_element ($p, $el) {
        $el = strtolower($el);
        
        if ( $el == 'item' or $el == 'entry' ) 
        {
            $this->items[] = $this->current_item;
            $this->current_item = array();
            $this->initem = false;
        }
        elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'textinput' ) 
        {
            $this->intextinput = false;
        }
        elseif ($this->feed_type == RSS and $this->current_namespace == '' and $el == 'image' ) 
        {
            $this->inimage = false;
        }
        elseif ($this->feed_type == ATOM and in_array($el, $this->_CONTENT_CONSTRUCTS) )
        {   
            $this->incontent = false;
        }
        elseif ($el == 'channel' or $el == 'feed' ) 
        {
            $this->inchannel = false;
        }
        elseif ($this->feed_type == ATOM and $this->incontent  ) {
            // balance tags properly
            // note:  i don't think this is actually neccessary
            if ( $this->stack[0] == $el ) 
            {
                $this->append_content("</$el>");
            }
            else {
                $this->append_content("<$el />");
            }

            array_shift( $this->stack );
        }
        else {
            array_shift( $this->stack );
        }
        
        $this->current_namespace = false;
    }
    
    function concat (&$str1, $str2="") {
        if (!isset($str1) ) {
            $str1="";
        }
        $str1 .= $str2;
    }
    
    
    
    function append_content($text) {
        if ( $this->initem ) {
            $this->concat( $this->current_item[ $this->incontent ], $text );
        }
        elseif ( $this->inchannel ) {
            $this->concat( $this->channel[ $this->incontent ], $text );
        }
    }
    
    // smart append - field and namespace aware
    function append($el, $text) {
        if (!$el) {
            return;
        }
        if ( $this->current_namespace ) 
        {
            if ( $this->initem ) {
                $this->concat(
                    $this->current_item[ $this->current_namespace ][ $el ], $text);
            }
            elseif ($this->inchannel) {
                $this->concat(
                    $this->channel[ $this->current_namespace][ $el ], $text );
            }
            elseif ($this->intextinput) {
                $this->concat(
                    $this->textinput[ $this->current_namespace][ $el ], $text );
            }
            elseif ($this->inimage) {
                $this->concat(
                    $this->image[ $this->current_namespace ][ $el ], $text );
            }
        }
        else {
            if ( $this->initem ) {
                $this->concat(
                    $this->current_item[ $el ], $text);
            }
            elseif ($this->intextinput) {
                $this->concat(
                    $this->textinput[ $el ], $text );
            }
            elseif ($this->inimage) {
                $this->concat(
                    $this->image[ $el ], $text );
            }
            elseif ($this->inchannel) {
                $this->concat(
                    $this->channel[ $el ], $text );
            }
            
        }
    }
    
    function normalize () {
        // if atom populate rss fields
        if ( $this->is_atom() ) {
            $this->channel['description'] = $this->channel['tagline'];
            for ( $i = 0; $i < count($this->items); $i++) {
                $item = $this->items[$i];
                if ( isset($item['summary']) )
                    $item['description'] = $item['summary'];
                if ( isset($item['atom_content']))
                    $item['content']['encoded'] = $item['atom_content'];
                
                $atom_date = (isset($item['issued']) ) ? $item['issued'] : $item['modified'];
                if ( $atom_date ) {
                    $epoch = @parse_w3cdtf($atom_date);
                    if ($epoch and $epoch > 0) {
                        $item['date_timestamp'] = $epoch;
                    }
                }
                
                $this->items[$i] = $item;
            }       
        }
        elseif ( $this->is_rss() ) {
            $this->channel['tagline'] = $this->channel['description'];
            for ( $i = 0; $i < count($this->items); $i++) {
                $item = $this->items[$i];
                if ( isset($item['description']))
                    $item['summary'] = $item['description'];
                if ( isset($item['content']['encoded'] ) )
                    $item['atom_content'] = $item['content']['encoded'];
                
                if ( $this->is_rss() == '1.0' and isset($item['dc']['date']) ) {
                    $epoch = @parse_w3cdtf($item['dc']['date']);
                    if ($epoch and $epoch > 0) {
                        $item['date_timestamp'] = $epoch;
                    }
                }
                elseif ( isset($item['pubdate']) ) {
                    $epoch = @strtotime($item['pubdate']);
                    if ($epoch > 0) {
                        $item['date_timestamp'] = $epoch;
                    }
                }
                
                $this->items[$i] = $item;
            }
        }
    }
    
    
    function is_rss () {
        if ( $this->feed_type == RSS ) {
            return $this->feed_version; 
        }
        else {
            return false;
        }
    }
    
    function is_atom() {
        if ( $this->feed_type == ATOM ) {
            return $this->feed_version;
        }
        else {
            return false;
        }
    }

    /**
    * return XML parser, and possibly re-encoded source
    *
    */
    function create_parser($source, $out_enc, $in_enc, $detect) {
        if ( substr(phpversion(),0,1) == 5) {
            $parser = $this->php5_create_parser($in_enc, $detect);
        }
        else {
            list($parser, $source) = $this->php4_create_parser($source, $in_enc, $detect);
        }
        if ($out_enc) {
            $this->encoding = $out_enc;
            xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, $out_enc);
        }
        
        return array($parser, $source);
    }
    
    /**
    * Instantiate an XML parser under PHP5
    *
    * PHP5 will do a fine job of detecting input encoding
    * if passed an empty string as the encoding. 
    *
    * All hail libxml2!
    *
    */
    function php5_create_parser($in_enc, $detect) {
        // by default php5 does a fine job of detecting input encodings
        if(!$detect && $in_enc) {
            return xml_parser_create($in_enc);
        }
        else {
            return xml_parser_create('');
        }
    }
    
    /**
    * Instaniate an XML parser under PHP4
    *
    * Unfortunately PHP4's support for character encodings
    * and especially XML and character encodings sucks.  As
    * long as the documents you parse only contain characters
    * from the ISO-8859-1 character set (a superset of ASCII,
    * and a subset of UTF-8) you're fine.  However once you
    * step out of that comfy little world things get mad, bad,
    * and dangerous to know.
    *
    * The following code is based on SJM's work with FoF
    * @see http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
    *
    */
    function php4_create_parser($source, $in_enc, $detect) {
        if ( !$detect ) {
            return array(xml_parser_create($in_enc), $source);
        }
        
        if (!$in_enc) {
            if (preg_match('/<?xml.*encoding=[\'"](.*?)[\'"].*?>/m', $source, $m)) {
                $in_enc = strtoupper($m[1]);
                $this->source_encoding = $in_enc;
            }
            else {
                $in_enc = 'UTF-8';
            }
        }
        
        if ($this->known_encoding($in_enc)) {
            return array(xml_parser_create($in_enc), $source);
        }
        
        // the dectected encoding is not one of the simple encodings PHP knows
        
        // attempt to use the iconv extension to
        // cast the XML to a known encoding
        // @see http://php.net/iconv
       
        if (function_exists('iconv'))  {
            $encoded_source = iconv($in_enc,'UTF-8', $source);
            if ($encoded_source) {
                return array(xml_parser_create('UTF-8'), $encoded_source);
            }
        }
        
        // iconv didn't work, try mb_convert_encoding
        // @see http://php.net/mbstring
        if(function_exists('mb_convert_encoding')) {
            $encoded_source = mb_convert_encoding($source, 'UTF-8', $in_enc );
            if ($encoded_source) {
                return array(xml_parser_create('UTF-8'), $encoded_source);
            }
        }
        
        // else 
        $this->error("Feed is in an unsupported character encoding. ($in_enc) " .
                     "You may see strange artifacts, and mangled characters.",
                     E_USER_NOTICE);
            
        return array(xml_parser_create(), $source);
    }
    
    function known_encoding($enc) {
        $enc = strtoupper($enc);
        if ( in_array($enc, $this->_KNOWN_ENCODINGS) ) {
            return $enc;
        }
        else {
            return false;
        }
    }

    function error ($errormsg, $lvl=E_USER_WARNING) {
        // append PHP's error message if track_errors enabled
        if ( isset($php_errormsg) ) { 
            $errormsg .= " ($php_errormsg)";
        }
        if ( MAGPIE_DEBUG ) {
            trigger_error( $errormsg, $lvl);        
        }
        else {
            error_log( $errormsg, 0);
        }
        
        $notices = E_USER_NOTICE|E_NOTICE;
        if ( $lvl&$notices ) {
            $this->WARNING = $errormsg;
        } else {
            $this->ERROR = $errormsg;
        }
    }
    
    
} // end class RSS

function map_attrs($k, $v) {
    return "$k=\"$v\"";
}

// patch to support medieval versions of PHP4.1.x, 
// courtesy, Ryan Currie, ryan@digibliss.com

if (!function_exists('array_change_key_case')) {
	define("CASE_UPPER",1);
	define("CASE_LOWER",0);


	function array_change_key_case($array,$case=CASE_LOWER) {
       if ($case=CASE_LOWER) $cmd=strtolower;
       elseif ($case=CASE_UPPER) $cmd=strtoupper;
       foreach($array as $key=>$value) {
               $output[$cmd($key)]=$value;
       }
       return $output;
	}

}

?>