includes/HttpFunctions.php

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