includes/HttpFunctions.php

   1 <?php
   2
   3 /**
   4  * @defgroup HTTP HTTP
   5  * @file
   6  * @ingroup HTTP
   7  */
   8
   9 /**
  10  * Various HTTP related functions
  11  * @ingroup HTTP
  12  */
  13 class Http {
  14
  15         /**
  16          * Simple wrapper for Http::request( 'GET' )
  17          * @see Http::request()
  18          */
  19         static function get( $url, $timeout = 'default', $opts = array() ) {
  20                 return Http::request( "GET", $url, $timeout, $opts );
  21         }
  22
  23         /**
  24          * Simple wrapper for Http::request( 'POST' )
  25          * @see Http::request()
  26          */
  27         static function post( $url, $timeout = 'default', $opts = array() ) {
  28                 return Http::request( "POST", $url, $timeout, $opts );
  29         }
  30
  31         /**
  32          * Get the contents of a file by HTTP
  33          * @param $method string HTTP method. Usually GET/POST
  34          * @param $url string Full URL to act on
  35          * @param $timeout int Seconds to timeout. 'default' falls to $wgHTTPTimeout
  36          * @param $curlOptions array Optional array of extra params to pass
  37          * to curl_setopt()
  38          */
  39         static function request( $method, $url, $timeout = 'default', $curlOptions = array() ) {
  40                 global $wgHTTPTimeout, $wgHTTPProxy, $wgVersion, $wgTitle;
  41
  42                 // Go ahead and set the timeout if not otherwise specified
  43                 if ( $timeout == 'default' ) {
  44                         $timeout = $wgHTTPTimeout;
  45                 }
  46
  47                 wfDebug( __METHOD__ . ": $method $url\n" );
  48                 # Use curl if available
  49                 if ( function_exists( 'curl_init' ) ) {
  50                         $c = curl_init( $url );
  51                         if ( self::isLocalURL( $url ) ) {
  52                                 curl_setopt( $c, CURLOPT_PROXY, 'localhost:80' );
  53                         } else if ($wgHTTPProxy) {
  54                                 curl_setopt($c, CURLOPT_PROXY, $wgHTTPProxy);
  55                         }
  56
  57                         curl_setopt( $c, CURLOPT_TIMEOUT, $timeout );
  58                         curl_setopt( $c, CURLOPT_USERAGENT, "MediaWiki/$wgVersion" );
  59                         if ( $method == 'POST' )
  60                                 curl_setopt( $c, CURLOPT_POST, true );
  61                         else
  62                                 curl_setopt( $c, CURLOPT_CUSTOMREQUEST, $method );
  63
  64                         # Set the referer to $wgTitle, even in command-line mode
  65                         # This is useful for interwiki transclusion, where the foreign
  66                         # server wants to know what the referring page is.
  67                         # $_SERVER['REQUEST_URI'] gives a less reliable indication of the
  68                         # referring page.
  69                         if ( is_object( $wgTitle ) ) {
  70                                 curl_setopt( $c, CURLOPT_REFERER, $wgTitle->getFullURL() );
  71                         }
  72
  73                         if ( is_array( $curlOptions ) ) {
  74                                 foreach( $curlOptions as $option => $value ) {
  75                                         curl_setopt( $c, $option, $value );
  76                                 }
  77                         }
  78
  79                         ob_start();
  80                         curl_exec( $c );
  81                         $text = ob_get_contents();
  82                         ob_end_clean();
  83
  84                         # Don't return the text of error messages, return false on error
  85                         if ( curl_getinfo( $c, CURLINFO_HTTP_CODE ) != 200 ) {
  86                                 $text = false;
  87                         }
  88                         # Don't return truncated output
  89                         if ( curl_errno( $c ) != CURLE_OK ) {
  90                                 $text = false;
  91                         }
  92                         curl_close( $c );
  93                 } else {
  94                         # Otherwise use file_get_contents...
  95                         # This doesn't have local fetch capabilities...
  96
  97                         global $wgVersion;
  98                         $headers = array( "User-Agent: MediaWiki/$wgVersion" );
  99                         if( strcasecmp( $method, 'post' ) == 0 ) {
 100                                 // Required for HTTP 1.0 POSTs
 101                                 $headers[] = "Content-Length: 0";
 102                         }
 103                         $opts = array(
 104                                 'http' => array(
 105                                         'method' => $method,
 106                                         'header' => implode( "\r\n", $headers ),
 107                                         'timeout' => $timeout ) );
 108                         $ctx = stream_context_create($opts);
 109
 110                         $url_fopen = ini_set( 'allow_url_fopen', 1 );
 111                         $text = file_get_contents( $url, false, $ctx );
 112                         ini_set( 'allow_url_fopen', $url_fopen );
 113                 }
 114                 return $text;
 115         }
 116
 117         /**
 118          * Check if the URL can be served by localhost
 119          * @param $url string Full url to check
 120          * @return bool
 121          */
 122         static function isLocalURL( $url ) {
 123                 global $wgCommandLineMode, $wgConf;
 124                 if ( $wgCommandLineMode ) {
 125                         return false;
 126                 }
 127
 128                 // Extract host part
 129                 $matches = array();
 130                 if ( preg_match( '!^http://([\w.-]+)[/:].*$!', $url, $matches ) ) {
 131                         $host = $matches[1];
 132                         // Split up dotwise
 133                         $domainParts = explode( '.', $host );
 134                         // Check if this domain or any superdomain is listed in $wgConf as a local virtual host
 135                         $domainParts = array_reverse( $domainParts );
 136                         for ( $i = 0; $i < count( $domainParts ); $i++ ) {
 137                                 $domainPart = $domainParts[$i];
 138                                 if ( $i == 0 ) {
 139                                         $domain = $domainPart;
 140                                 } else {
 141                                         $domain = $domainPart . '.' . $domain;
 142                                 }
 143                                 if ( $wgConf->isLocalVHost( $domain ) ) {
 144                                         return true;
 145                                 }
 146                         }
 147                 }
 148                 return false;
 149         }
 150 }