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