includes/HttpFunctions.php

   1 <?php
   2 /**
   3  * Various HTTP related functions
   4  */
   5
   6 class HttpFunctions {
   7         /**
   8          * Get the contents of a file by HTTP
   9          *
  10          * if $timeout is 'default', $wgHTTPTimeout is used
  11          */
  12         function getHTTP( $url, $timeout = 'default' ) {
  13                 global $wgHTTPTimeout, $wgHTTPProxy, $wgVersion, $wgTitle;
  14
  15                 # Use curl if available
  16                 if ( function_exists( 'curl_init' ) ) {
  17                         $c = curl_init( $url );
  18                         if ( HttpFunctions::isLocalURL( $url ) ) {
  19                                 curl_setopt( $c, CURLOPT_PROXY, 'localhost:80' );
  20                         } else if ($wgHTTPProxy) {
  21                                 curl_setopt($c, CURLOPT_PROXY, $wgHTTPProxy);
  22                         }
  23
  24                         if ( $timeout == 'default' ) {
  25                                 $timeout = $wgHTTPTimeout;
  26                         }
  27                         curl_setopt( $c, CURLOPT_TIMEOUT, $timeout );
  28                         curl_setopt( $c, CURLOPT_USERAGENT, "MediaWiki/$wgVersion" );
  29
  30                         # Set the referer to $wgTitle, even in command-line mode
  31                         # This is useful for interwiki transclusion, where the foreign
  32                         # server wants to know what the referring page is.
  33                         # $_SERVER['REQUEST_URI'] gives a less reliable indication of the
  34                         # referring page.
  35                         if ( is_object( $wgTitle ) ) {
  36                                 curl_setopt( $c, CURLOPT_REFERER, $wgTitle->getFullURL() );
  37                         }
  38
  39                         ob_start();
  40                         curl_exec( $c );
  41                         $text = ob_get_contents();
  42                         ob_end_clean();
  43
  44                         # Don't return the text of error messages, return false on error
  45                         if ( curl_getinfo( $c, CURLINFO_HTTP_CODE ) != 200 ) {
  46                                 $text = false;
  47                         }
  48                         curl_close( $c );
  49                 } else {
  50                         # Otherwise use file_get_contents, or its compatibility function from GlobalFunctions.php
  51                         # This may take 3 minutes to time out, and doesn't have local fetch capabilities
  52                         $url_fopen = ini_set( 'allow_url_fopen', 1 );
  53                         $text = file_get_contents( $url );
  54                         ini_set( 'allow_url_fopen', $url_fopen );
  55                 }
  56                 return $text;
  57         }
  58
  59         /**
  60          * Check if the URL can be served by localhost
  61          */
  62         function isLocalURL( $url ) {
  63                 global $wgCommandLineMode, $wgConf;
  64                 if ( $wgCommandLineMode ) {
  65                         return false;
  66                 }
  67
  68                 // Extract host part
  69                 $matches = array();
  70                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
  71                         $host = $matches[1];
  72                         // Split up dotwise
  73                         $domainParts = explode( '.', $host );
  74                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
  75                         $domainParts = array_reverse( $domainParts );
  76                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
  77                                 $domainPart = $domainParts[$i];
  78                                 if ( $i == 0 ) {
  79                                         $domain = $domainPart;
  80                                 } else {
  81                                         $domain = $domainPart . '.' . $domain;
  82                                 }
  83                                 if ( $wgConf->isLocalVHost( $domain ) ) {
  84                                         return true;
  85                                 }
  86                         }
  87                 }
  88                 return false;
  89         }
  90 }
  91 ?>