includes/HttpFunctions.php

   1 <?php
   2
   3 /**
   4  * Various HTTP related functions
   5  */
   6 class Http {
   7         static function get( $url, $timeout = 'default' ) {
   8                 return Http::request( "GET", $url, $timeout );
   9         }
  10
  11         static function post( $url, $timeout = 'default' ) {
  12                 return Http::request( "POST", $url, $timeout );
  13         }
  14
  15         /**
  16          * Get the contents of a file by HTTP
  17          *
  18          * if $timeout is 'default', $wgHTTPTimeout is used
  19          */
  20         static function request( $method, $url, $timeout = 'default' ) {
  21                 global $wgHTTPTimeout, $wgHTTPProxy, $wgVersion, $wgTitle;
  22
  23                 # Use curl if available
  24                 if ( function_exists( 'curl_init' ) ) {
  25                         $c = curl_init( $url );
  26                         if ( wfIsLocalURL( $url ) ) {
  27                                 curl_setopt( $c, CURLOPT_PROXY, 'localhost:80' );
  28                         } else if ($wgHTTPProxy) {
  29                                 curl_setopt($c, CURLOPT_PROXY, $wgHTTPProxy);
  30                         }
  31
  32                         if ( $timeout == 'default' ) {
  33                                 $timeout = $wgHTTPTimeout;
  34                         }
  35                         curl_setopt( $c, CURLOPT_TIMEOUT, $timeout );
  36                         curl_setopt( $c, CURLOPT_USERAGENT, "MediaWiki/$wgVersion" );
  37                         if ( $method == 'POST' )
  38                                 curl_setopt( $c, CURLOPT_POST, true );
  39                         else
  40                                 curl_setopt( $c, CURLOPT_CUSTOMREQUEST, $method );
  41
  42                         # Set the referer to $wgTitle, even in command-line mode
  43                         # This is useful for interwiki transclusion, where the foreign
  44                         # server wants to know what the referring page is.
  45                         # $_SERVER['REQUEST_URI'] gives a less reliable indication of the
  46                         # referring page.
  47                         if ( is_object( $wgTitle ) ) {
  48                                 curl_setopt( $c, CURLOPT_REFERER, $wgTitle->getFullURL() );
  49                         }
  50
  51                         ob_start();
  52                         curl_exec( $c );
  53                         $text = ob_get_contents();
  54                         ob_end_clean();
  55
  56                         # Don't return the text of error messages, return false on error
  57                         if ( curl_getinfo( $c, CURLINFO_HTTP_CODE ) != 200 ) {
  58                                 $text = false;
  59                         }
  60                         curl_close( $c );
  61                 } else {
  62                         # Otherwise use file_get_contents, or its compatibility function from GlobalFunctions.php
  63                         # This may take 3 minutes to time out, and doesn't have local fetch capabilities
  64
  65                         $opts = array('http' => array( 'method' => $method ) );
  66                         if( strcasecmp( $method, 'post' ) == 0 ) {
  67                                 // Required for HTTP 1.0 POSTs
  68                                 $opts['http']['header'] = "Content-Length: 0";
  69                         }
  70                         $ctx = stream_context_create($opts);
  71
  72                         $url_fopen = ini_set( 'allow_url_fopen', 1 );
  73                         $text = file_get_contents( $url, false, $ctx );
  74                         ini_set( 'allow_url_fopen', $url_fopen );
  75                 }
  76                 return $text;
  77         }
  78
  79         /**
  80          * Check if the URL can be served by localhost
  81          */
  82         static function isLocalURL( $url ) {
  83                 global $wgCommandLineMode, $wgConf;
  84                 if ( $wgCommandLineMode ) {
  85                         return false;
  86                 }
  87
  88                 // Extract host part
  89                 $matches = array();
  90                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
  91                         $host = $matches[1];
  92                         // Split up dotwise
  93                         $domainParts = explode( '.', $host );
  94                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
  95                         $domainParts = array_reverse( $domainParts );
  96                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
  97                                 $domainPart = $domainParts[$i];
  98                                 if ( $i == 0 ) {
  99                                         $domain = $domainPart;
 100                                 } else {
 101                                         $domain = $domainPart . '.' . $domain;
 102                                 }
 103                                 if ( $wgConf->isLocalVHost( $domain ) ) {
 104                                         return true;
 105                                 }
 106                         }
 107                 }
 108                 return false;
 109         }
 110 }
 111