wp-includes/SimplePie/File.php

   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 }