includes/HttpFunctions.php

   1 <?php
   2
   3 /**
   4  * @defgroup HTTP HTTP
   5  *
   6  * Various HTTP related functions
   7  * @ingroup HTTP
   8  */
   9 class Http {
  10         static function get( $url, $timeout = 'default', $opts = array() ) {
  11                 return Http::request( "GET", $url, $timeout, $opts );
  12         }
  13
  14         static function post( $url, $timeout = 'default', $opts = array() ) {
  15                 return Http::request( "POST", $url, $timeout, $opts );
  16         }
  17
  18         /**
  19          * Get the contents of a file by HTTP
  20          *
  21          * if $timeout is 'default', $wgHTTPTimeout is used
  22          */
  23         static function request( $method, $url, $timeout = 'default', $curlOptions = array() ) {
  24                 global $wgHTTPTimeout, $wgHTTPProxy, $wgVersion, $wgTitle;
  25
  26                 wfDebug( __METHOD__ . ": $method $url\n" );
  27                 # Use curl if available
  28                 if ( function_exists( 'curl_init' ) ) {
  29                         $c = curl_init( $url );
  30                         if ( self::isLocalURL( $url ) ) {
  31                                 curl_setopt( $c, CURLOPT_PROXY, 'localhost:80' );
  32                         } else if ($wgHTTPProxy) {
  33                                 curl_setopt($c, CURLOPT_PROXY, $wgHTTPProxy);
  34                         }
  35
  36                         if ( $timeout == 'default' ) {
  37                                 $timeout = $wgHTTPTimeout;
  38                         }
  39                         curl_setopt( $c, CURLOPT_TIMEOUT, $timeout );
  40                         curl_setopt( $c, CURLOPT_USERAGENT, "MediaWiki/$wgVersion" );
  41                         if ( $method == 'POST' )
  42                                 curl_setopt( $c, CURLOPT_POST, true );
  43                         else
  44                                 curl_setopt( $c, CURLOPT_CUSTOMREQUEST, $method );
  45
  46                         # Set the referer to $wgTitle, even in command-line mode
  47                         # This is useful for interwiki transclusion, where the foreign
  48                         # server wants to know what the referring page is.
  49                         # $_SERVER['REQUEST_URI'] gives a less reliable indication of the
  50                         # referring page.
  51                         if ( is_object( $wgTitle ) ) {
  52                                 curl_setopt( $c, CURLOPT_REFERER, $wgTitle->getFullURL() );
  53                         }
  54
  55                         if ( is_array( $curlOptions ) ) {
  56                                 foreach( $curlOptions as $option => $value ) {
  57                                         curl_setopt( $c, $option, $value );
  58                                 }
  59                         }
  60
  61                         ob_start();
  62                         curl_exec( $c );
  63                         $text = ob_get_contents();
  64                         ob_end_clean();
  65
  66                         # Don't return the text of error messages, return false on error
  67                         if ( curl_getinfo( $c, CURLINFO_HTTP_CODE ) != 200 ) {
  68                                 $text = false;
  69                         }
  70                         # Don't return truncated output
  71                         if ( curl_errno( $c ) != CURLE_OK ) {
  72                                 $text = false;
  73                         }
  74                         curl_close( $c );
  75                 } else {
  76                         # Otherwise use file_get_contents...
  77                         # This may take 3 minutes to time out, and doesn't have local fetch capabilities
  78
  79                         global $wgVersion;
  80                         $headers = array( "User-Agent: MediaWiki/$wgVersion" );
  81                         if( strcasecmp( $method, 'post' ) == 0 ) {
  82                                 // Required for HTTP 1.0 POSTs
  83                                 $headers[] = "Content-Length: 0";
  84                         }
  85                         $opts = array(
  86                                 'http' => array(
  87                                         'method' => $method,
  88                                         'header' => implode( "\r\n", $headers ) ) );
  89                         $ctx = stream_context_create($opts);
  90
  91                         $url_fopen = ini_set( 'allow_url_fopen', 1 );
  92                         $text = file_get_contents( $url, false, $ctx );
  93                         ini_set( 'allow_url_fopen', $url_fopen );
  94                 }
  95                 return $text;
  96         }
  97
  98         /**
  99          * Check if the URL can be served by localhost
 100          */
 101         static function isLocalURL( $url ) {
 102                 global $wgCommandLineMode, $wgConf;
 103                 if ( $wgCommandLineMode ) {
 104                         return false;
 105                 }
 106
 107                 // Extract host part
 108                 $matches = array();
 109                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
 110                         $host = $matches[1];
 111                         // Split up dotwise
 112                         $domainParts = explode( '.', $host );
 113                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
 114                         $domainParts = array_reverse( $domainParts );
 115                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
 116                                 $domainPart = $domainParts[$i];
 117                                 if ( $i == 0 ) {
 118                                         $domain = $domainPart;
 119                                 } else {
 120                                         $domain = $domainPart . '.' . $domain;
 121                                 }
 122                                 if ( $wgConf->isLocalVHost( $domain ) ) {
 123                                         return true;
 124                                 }
 125                         }
 126                 }
 127                 return false;
 128         }
 129 }