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   1  <?php
   2  /**
   3   * SimplePie
   4   *
   5   * A PHP-Based RSS and Atom Feed Framework.
   6   * Takes the hard work out of managing a complete RSS/Atom solution.
   7   *
   8   * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
   9   * All rights reserved.
  10   *
  11   * Redistribution and use in source and binary forms, with or without modification, are
  12   * permitted provided that the following conditions are met:
  13   *
  14   *     * Redistributions of source code must retain the above copyright notice, this list of
  15   *       conditions and the following disclaimer.
  16   *
  17   *     * Redistributions in binary form must reproduce the above copyright notice, this list
  18   *       of conditions and the following disclaimer in the documentation and/or other materials
  19   *       provided with the distribution.
  20   *
  21   *     * Neither the name of the SimplePie Team nor the names of its contributors may be used
  22   *       to endorse or promote products derived from this software without specific prior
  23   *       written permission.
  24   *
  25   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
  26   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  27   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
  28   * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  29   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  30   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  31   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  32   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  33   * POSSIBILITY OF SUCH DAMAGE.
  34   *
  35   * @package SimplePie
  36   * @version 1.3.1
  37   * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
  38   * @author Ryan Parman
  39   * @author Geoffrey Sneddon
  40   * @author Ryan McCue
  41   * @link http://simplepie.org/ SimplePie
  42   * @license http://www.opensource.org/licenses/bsd-license.php BSD License
  43   */
  44  
  45  /**
  46   * Used for fetching remote files and reading local files
  47   *
  48   * Supports HTTP 1.0 via cURL or fsockopen, with spotty HTTP 1.1 support
  49   *
  50   * This class can be overloaded with {@see SimplePie::set_file_class()}
  51   *
  52   * @package SimplePie
  53   * @subpackage HTTP
  54   * @todo Move to properly supporting RFC2616 (HTTP/1.1)
  55   */
  56  class SimplePie_File
  57  {
  58      var $url;
  59      var $useragent;
  60      var $success = true;
  61      var $headers = array();
  62      var $body;
  63      var $status_code;
  64      var $redirects = 0;
  65      var $error;
  66      var $method = SIMPLEPIE_FILE_SOURCE_NONE;
  67  
  68  	public function __construct($url, $timeout = 10, $redirects = 5, $headers = null, $useragent = null, $force_fsockopen = false)
  69      {
  70          if (class_exists('idna_convert'))
  71          {
  72              $idn = new idna_convert();
  73              $parsed = SimplePie_Misc::parse_url($url);
  74              $url = SimplePie_Misc::compress_parse_url($parsed['scheme'], $idn->encode($parsed['authority']), $parsed['path'], $parsed['query'], $parsed['fragment']);
  75          }
  76          $this->url = $url;
  77          $this->useragent = $useragent;
  78          if (preg_match('/^http(s)?:\/\//i', $url))
  79          {
  80              if ($useragent === null)
  81              {
  82                  $useragent = ini_get('user_agent');
  83                  $this->useragent = $useragent;
  84              }
  85              if (!is_array($headers))
  86              {
  87                  $headers = array();
  88              }
  89              if (!$force_fsockopen && function_exists('curl_exec'))
  90              {
  91                  $this->method = SIMPLEPIE_FILE_SOURCE_REMOTE | SIMPLEPIE_FILE_SOURCE_CURL;
  92                  $fp = curl_init();
  93                  $headers2 = array();
  94                  foreach ($headers as $key => $value)
  95                  {
  96                      $headers2[] = "$key: $value";
  97                  }
  98                  if (version_compare(SimplePie_Misc::get_curl_version(), '7.10.5', '>='))
  99                  {
 100                      curl_setopt($fp, CURLOPT_ENCODING, '');
 101                  }
 102                  curl_setopt($fp, CURLOPT_URL, $url);
 103                  curl_setopt($fp, CURLOPT_HEADER, 1);
 104                  curl_setopt($fp, CURLOPT_RETURNTRANSFER, 1);
 105                  curl_setopt($fp, CURLOPT_TIMEOUT, $timeout);
 106                  curl_setopt($fp, CURLOPT_CONNECTTIMEOUT, $timeout);
 107                  curl_setopt($fp, CURLOPT_REFERER, $url);
 108                  curl_setopt($fp, CURLOPT_USERAGENT, $useragent);
 109                  curl_setopt($fp, CURLOPT_HTTPHEADER, $headers2);
 110                  if (!ini_get('open_basedir') && !ini_get('safe_mode') && version_compare(SimplePie_Misc::get_curl_version(), '7.15.2', '>='))
 111                  {
 112                      curl_setopt($fp, CURLOPT_FOLLOWLOCATION, 1);
 113                      curl_setopt($fp, CURLOPT_MAXREDIRS, $redirects);
 114                  }
 115  
 116                  $this->headers = curl_exec($fp);
 117                  if (curl_errno($fp) === 23 || curl_errno($fp) === 61)
 118                  {
 119                      curl_setopt($fp, CURLOPT_ENCODING, 'none');
 120                      $this->headers = curl_exec($fp);
 121                  }
 122                  if (curl_errno($fp))
 123                  {
 124                      $this->error = 'cURL error ' . curl_errno($fp) . ': ' . curl_error($fp);
 125                      $this->success = false;
 126                  }
 127                  else
 128                  {
 129                      $info = curl_getinfo($fp);
 130                      curl_close($fp);
 131                      $this->headers = explode("\r\n\r\n", $this->headers, $info['redirect_count'] + 1);
 132                      $this->headers = array_pop($this->headers);
 133                      $parser = new SimplePie_HTTP_Parser($this->headers);
 134                      if ($parser->parse())
 135                      {
 136                          $this->headers = $parser->headers;
 137                          $this->body = $parser->body;
 138                          $this->status_code = $parser->status_code;
 139                          if ((in_array($this->status_code, array(300, 301, 302, 303, 307)) || $this->status_code > 307 && $this->status_code < 400) && isset($this->headers['location']) && $this->redirects < $redirects)
 140                          {
 141                              $this->redirects++;
 142                              $location = SimplePie_Misc::absolutize_url($this->headers['location'], $url);
 143                              return $this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen);
 144                          }
 145                      }
 146                  }
 147              }
 148              else
 149              {
 150                  $this->method = SIMPLEPIE_FILE_SOURCE_REMOTE | SIMPLEPIE_FILE_SOURCE_FSOCKOPEN;
 151                  $url_parts = parse_url($url);
 152                  $socket_host = $url_parts['host'];
 153                  if (isset($url_parts['scheme']) && strtolower($url_parts['scheme']) === 'https')
 154                  {
 155                      $socket_host = "ssl://$url_parts[host]";
 156                      $url_parts['port'] = 443;
 157                  }
 158                  if (!isset($url_parts['port']))
 159                  {
 160                      $url_parts['port'] = 80;
 161                  }
 162                  $fp = @fsockopen($socket_host, $url_parts['port'], $errno, $errstr, $timeout);
 163                  if (!$fp)
 164                  {
 165                      $this->error = 'fsockopen error: ' . $errstr;
 166                      $this->success = false;
 167                  }
 168                  else
 169                  {
 170                      stream_set_timeout($fp, $timeout);
 171                      if (isset($url_parts['path']))
 172                      {
 173                          if (isset($url_parts['query']))
 174                          {
 175                              $get = "$url_parts[path]?$url_parts[query]";
 176                          }
 177                          else
 178                          {
 179                              $get = $url_parts['path'];
 180                          }
 181                      }
 182                      else
 183                      {
 184                          $get = '/';
 185                      }
 186                      $out = "GET $get HTTP/1.1\r\n";
 187                      $out .= "Host: $url_parts[host]\r\n";
 188                      $out .= "User-Agent: $useragent\r\n";
 189                      if (extension_loaded('zlib'))
 190                      {
 191                          $out .= "Accept-Encoding: x-gzip,gzip,deflate\r\n";
 192                      }
 193  
 194                      if (isset($url_parts['user']) && isset($url_parts['pass']))
 195                      {
 196                          $out .= "Authorization: Basic " . base64_encode("$url_parts[user]:$url_parts[pass]") . "\r\n";
 197                      }
 198                      foreach ($headers as $key => $value)
 199                      {
 200                          $out .= "$key: $value\r\n";
 201                      }
 202                      $out .= "Connection: Close\r\n\r\n";
 203                      fwrite($fp, $out);
 204  
 205                      $info = stream_get_meta_data($fp);
 206  
 207                      $this->headers = '';
 208                      while (!$info['eof'] && !$info['timed_out'])
 209                      {
 210                          $this->headers .= fread($fp, 1160);
 211                          $info = stream_get_meta_data($fp);
 212                      }
 213                      if (!$info['timed_out'])
 214                      {
 215                          $parser = new SimplePie_HTTP_Parser($this->headers);
 216                          if ($parser->parse())
 217                          {
 218                              $this->headers = $parser->headers;
 219                              $this->body = $parser->body;
 220                              $this->status_code = $parser->status_code;
 221                              if ((in_array($this->status_code, array(300, 301, 302, 303, 307)) || $this->status_code > 307 && $this->status_code < 400) && isset($this->headers['location']) && $this->redirects < $redirects)
 222                              {
 223                                  $this->redirects++;
 224                                  $location = SimplePie_Misc::absolutize_url($this->headers['location'], $url);
 225                                  return $this->__construct($location, $timeout, $redirects, $headers, $useragent, $force_fsockopen);
 226                              }
 227                              if (isset($this->headers['content-encoding']))
 228                              {
 229                                  // Hey, we act dumb elsewhere, so let's do that here too
 230                                  switch (strtolower(trim($this->headers['content-encoding'], "\x09\x0A\x0D\x20")))
 231                                  {
 232                                      case 'gzip':
 233                                      case 'x-gzip':
 234                                          $decoder = new SimplePie_gzdecode($this->body);
 235                                          if (!$decoder->parse())
 236                                          {
 237                                              $this->error = 'Unable to decode HTTP "gzip" stream';
 238                                              $this->success = false;
 239                                          }
 240                                          else
 241                                          {
 242                                              $this->body = $decoder->data;
 243                                          }
 244                                          break;
 245  
 246                                      case 'deflate':
 247                                          if (($decompressed = gzinflate($this->body)) !== false)
 248                                          {
 249                                              $this->body = $decompressed;
 250                                          }
 251                                          else if (($decompressed = gzuncompress($this->body)) !== false)
 252                                          {
 253                                              $this->body = $decompressed;
 254                                          }
 255                                          else if (function_exists('gzdecode') && ($decompressed = gzdecode($this->body)) !== false)
 256                                          {
 257                                              $this->body = $decompressed;
 258                                          }
 259                                          else
 260                                          {
 261                                              $this->error = 'Unable to decode HTTP "deflate" stream';
 262                                              $this->success = false;
 263                                          }
 264                                          break;
 265  
 266                                      default:
 267                                          $this->error = 'Unknown content coding';
 268                                          $this->success = false;
 269                                  }
 270                              }
 271                          }
 272                      }
 273                      else
 274                      {
 275                          $this->error = 'fsocket timed out';
 276                          $this->success = false;
 277                      }
 278                      fclose($fp);
 279                  }
 280              }
 281          }
 282          else
 283          {
 284              $this->method = SIMPLEPIE_FILE_SOURCE_LOCAL | SIMPLEPIE_FILE_SOURCE_FILE_GET_CONTENTS;
 285              if (!$this->body = file_get_contents($url))
 286              {
 287                  $this->error = 'file_get_contents could not read the file';
 288                  $this->success = false;
 289              }
 290          }
 291      }
 292  }