includes/HttpFunctions.php

   1 <?php
   2
   3 /**
   4  * Various HTTP related functions
   5  * @ingroup HTTP
   6  */
   7 class Http {
   8         static function get( $url, $timeout = 'default' ) {
   9                 return Http::request( "GET", $url, $timeout );
  10         }
  11
  12         static function post( $url, $timeout = 'default' ) {
  13                 return Http::request( "POST", $url, $timeout );
  14         }
  15
  16         /**
  17          * Get the contents of a file by HTTP
  18          *
  19          * if $timeout is 'default', $wgHTTPTimeout is used
  20          */
  21         static function request( $method, $url, $timeout = 'default' ) {
  22                 global $wgHTTPTimeout, $wgHTTPProxy, $wgVersion, $wgTitle;
  23
  24                 wfDebug( __METHOD__ . ": $method $url\n" );
  25                 # Use curl if available
  26                 if ( function_exists( 'curl_init' ) ) {
  27                         $c = curl_init( $url );
  28                         if ( self::isLocalURL( $url ) ) {
  29                                 curl_setopt( $c, CURLOPT_PROXY, 'localhost:80' );
  30                         } else if ($wgHTTPProxy) {
  31                                 curl_setopt($c, CURLOPT_PROXY, $wgHTTPProxy);
  32                         }
  33
  34                         if ( $timeout == 'default' ) {
  35                                 $timeout = $wgHTTPTimeout;
  36                         }
  37                         curl_setopt( $c, CURLOPT_TIMEOUT, $timeout );
  38                         curl_setopt( $c, CURLOPT_USERAGENT, "MediaWiki/$wgVersion" );
  39                         if ( $method == 'POST' )
  40                                 curl_setopt( $c, CURLOPT_POST, true );
  41                         else
  42                                 curl_setopt( $c, CURLOPT_CUSTOMREQUEST, $method );
  43
  44                         # Set the referer to $wgTitle, even in command-line mode
  45                         # This is useful for interwiki transclusion, where the foreign
  46                         # server wants to know what the referring page is.
  47                         # $_SERVER['REQUEST_URI'] gives a less reliable indication of the
  48                         # referring page.
  49                         if ( is_object( $wgTitle ) ) {
  50                                 curl_setopt( $c, CURLOPT_REFERER, $wgTitle->getFullURL() );
  51                         }
  52
  53                         ob_start();
  54                         curl_exec( $c );
  55                         $text = ob_get_contents();
  56                         ob_end_clean();
  57
  58                         # Don't return the text of error messages, return false on error
  59                         if ( curl_getinfo( $c, CURLINFO_HTTP_CODE ) != 200 ) {
  60                                 $text = false;
  61                         }
  62                         # Don't return truncated output
  63                         if ( curl_errno( $c ) != CURLE_OK ) {
  64                                 $text = false;
  65                         }
  66                         curl_close( $c );
  67                 } else {
  68                         # Otherwise use file_get_contents...
  69                         # This may take 3 minutes to time out, and doesn't have local fetch capabilities
  70
  71                         global $wgVersion;
  72                         $headers = array( "User-Agent: MediaWiki/$wgVersion" );
  73                         if( strcasecmp( $method, 'post' ) == 0 ) {
  74                                 // Required for HTTP 1.0 POSTs
  75                                 $headers[] = "Content-Length: 0";
  76                         }
  77                         $opts = array(
  78                                 'http' => array(
  79                                         'method' => $method,
  80                                         'header' => implode( "\r\n", $headers ) ) );
  81                         $ctx = stream_context_create($opts);
  82
  83                         $url_fopen = ini_set( 'allow_url_fopen', 1 );
  84                         $text = file_get_contents( $url, false, $ctx );
  85                         ini_set( 'allow_url_fopen', $url_fopen );
  86                 }
  87                 return $text;
  88         }
  89
  90         /**
  91          * Check if the URL can be served by localhost
  92          */
  93         static function isLocalURL( $url ) {
  94                 global $wgCommandLineMode, $wgConf;
  95                 if ( $wgCommandLineMode ) {
  96                         return false;
  97                 }
  98
  99                 // Extract host part
 100                 $matches = array();
 101                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
 102                         $host = $matches[1];
 103                         // Split up dotwise
 104                         $domainParts = explode( '.', $host );
 105                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
 106                         $domainParts = array_reverse( $domainParts );
 107                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
 108                                 $domainPart = $domainParts[$i];
 109                                 if ( $i == 0 ) {
 110                                         $domain = $domainPart;
 111                                 } else {
 112                                         $domain = $domainPart . '.' . $domain;
 113                                 }
 114                                 if ( $wgConf->isLocalVHost( $domain ) ) {
 115                                         return true;
 116                                 }
 117                         }
 118                 }
 119                 return false;
 120         }
 121 }