+
+ /**
+ * Return a standard user-agent we can use for external requests.
+ */
+ public static function userAgent() {
+ global $wgVersion;
+ return "MediaWiki/$wgVersion";
+ }
+}
+
+class HttpRequest {
+ var $target_file_path;
+ var $upload_session_key;
+
+ function __construct( $url, $opt ){
+ global $wgSyncHTTPTimeout;
+ // double check that it's a valid url:
+ $this->url = $url;
+
+ // set the timeout to default sync timeout (unless the timeout option is provided)
+ $this->timeout = ( isset( $opt['timeout'] ) ) ? $opt['timeout'] : $wgSyncHTTPTimeout;
+ $this->method = ( isset( $opt['method'] ) ) ? $opt['method'] : 'GET';
+ $this->target_file_path = ( isset( $opt['target_file_path'] ) ) ? $opt['target_file_path'] : false;
+ $this->upload_session_key = ( isset( $opt['upload_session_key'] ) ) ? $opt['upload_session_key'] : false;
+ $this->headers_only = ( isset( $opt['headers_only'] ) ) ? $opt['headers_only'] : false;
+ }
+
+ /**
+ * Get the contents of a file by HTTP
+ * @param $url string Full URL to act on
+ * @param $Opt associative array Optional array of options:
+ * 'method' => 'GET', 'POST' etc.
+ * 'target_file_path' => if curl should output to a target file
+ * 'adapter' => 'curl', 'soket'
+ */
+ public function doRequest() {
+ # Make sure we have a valid url
+ if( !UploadFromUrl::isValidURI( $this->url ) )
+ return Status::newFatal('bad-url');
+
+ # Use curl if available
+ if ( function_exists( 'curl_init' ) ) {
+ return $this->doCurlReq();
+ } else {
+ return $this->doPhpReq();
+ }
+ }
+
+ private function doCurlReq(){
+ global $wgHTTPProxy, $wgTitle;
+
+ $status = Status::newGood();
+ $c = curl_init( $this->url );
+
+ // proxy setup:
+ if ( Http::isLocalURL( $this->url ) ) {
+ curl_setopt( $c, CURLOPT_PROXY, 'localhost:80' );
+ } else if ( $wgHTTPProxy ) {
+ curl_setopt( $c, CURLOPT_PROXY, $wgHTTPProxy );
+ }
+
+ curl_setopt( $c, CURLOPT_TIMEOUT, $this->timeout );
+ curl_setopt( $c, CURLOPT_USERAGENT, Http::userAgent() );
+
+ if ( $this->headers_only ) {
+ curl_setopt( $c, CURLOPT_NOBODY, true );
+ curl_setopt( $c, CURLOPT_HEADER, true );
+ } elseif ( $this->method == 'POST' ) {
+ curl_setopt( $c, CURLOPT_POST, true );
+ curl_setopt( $c, CURLOPT_POSTFIELDS, '' );
+ } else {
+ curl_setopt( $c, CURLOPT_CUSTOMREQUEST, $this->method );
+ }
+
+ # Set the referer to $wgTitle, even in command-line mode
+ # This is useful for interwiki transclusion, where the foreign
+ # server wants to know what the referring page is.
+ # $_SERVER['REQUEST_URI'] gives a less reliable indication of the
+ # referring page.
+ if ( is_object( $wgTitle ) ) {
+ curl_setopt( $c, CURLOPT_REFERER, $wgTitle->getFullURL() );
+ }
+
+ // set the write back function (if we are writing to a file)
+ if( $this->target_file_path ){
+ $cwrite = new simpleFileWriter( $this->target_file_path, $this->upload_session_key );
+ if( !$cwrite->status->isOK() ){
+ wfDebug( __METHOD__ . "ERROR in setting up simpleFileWriter\n" );
+ $status = $cwrite->status;
+ return $status;
+ }
+ curl_setopt( $c, CURLOPT_WRITEFUNCTION, array( $cwrite, 'callbackWriteBody' ) );
+ }
+
+ // start output grabber:
+ if( !$this->target_file_path )
+ ob_start();
+
+ //run the actual curl_exec:
+ try {
+ if ( false === curl_exec( $c ) ) {
+ $error_txt ='Error sending request: #' . curl_errno( $c ) .' '. curl_error( $c );
+ wfDebug( __METHOD__ . $error_txt . "\n" );
+ $status = Status::newFatal( $error_txt );
+ }
+ } catch ( Exception $e ) {
+ // do something with curl exec error?
+ }
+ // if direct request output the results to the stats value:
+ if( !$this->target_file_path && $status->isOK() ){
+ $status->value = ob_get_contents();
+ ob_end_clean();
+ }
+ // if we wrote to a target file close up or return error
+ if( $this->target_file_path ){
+ $cwrite->close();
+ if( !$cwrite->status->isOK() ){
+ return $cwrite->status;
+ }
+ }
+
+ if ( $this->headers_only ) {
+ $headers = explode( "\n", $status->value );
+ $headerArray = array();
+ foreach ( $headers as $header ) {
+ if ( !strlen( trim( $header ) ) )
+ continue;
+ $headerParts = explode( ':', $header, 2 );
+ if ( count( $headerParts ) == 1 ) {
+ $headerArray[] = trim( $header );
+ } else {
+ list( $key, $val ) = $headerParts;
+ $headerArray[trim( $key )] = trim( $val );
+ }
+ }
+ $status->value = $headerArray;
+ } else {
+ # Don't return the text of error messages, return false on error
+ $retcode = curl_getinfo( $c, CURLINFO_HTTP_CODE );
+ if ( $retcode != 200 ) {
+ wfDebug( __METHOD__ . ": HTTP return code $retcode\n" );
+ $status = Status::newFatal( "HTTP return code $retcode\n" );
+ }
+ # Don't return truncated output
+ $errno = curl_errno( $c );
+ if ( $errno != CURLE_OK ) {
+ $errstr = curl_error( $c );
+ wfDebug( __METHOD__ . ": CURL error code $errno: $errstr\n" );
+ $status = Status::newFatal( " CURL error code $errno: $errstr\n" );
+ }
+ }
+
+ curl_close( $c );
+
+ // return the result obj
+ return $status;
+ }
+
+ public function doPhpReq(){
+ global $wgTitle, $wgHTTPProxy;
+
+ # Check for php.ini allow_url_fopen
+ if( !ini_get( 'allow_url_fopen' ) ){
+ return Status::newFatal( 'allow_url_fopen needs to be enabled for http copy to work' );
+ }
+
+ // start with good status:
+ $status = Status::newGood();
+
+ if ( $this->headers_only ) {
+ $status->value = get_headers( $this->url, 1 );
+ return $status;
+ }
+
+ // setup the headers
+ $headers = array( "User-Agent: " . Http::userAgent() );
+ if ( is_object( $wgTitle ) ) {
+ $headers[] = "Referer: ". $wgTitle->getFullURL();
+ }
+
+ if( strcasecmp( $this->method, 'post' ) == 0 ) {
+ // Required for HTTP 1.0 POSTs
+ $headers[] = "Content-Length: 0";
+ }
+ $fcontext = stream_context_create ( array(
+ 'http' => array(
+ 'method' => $this->method,
+ 'header' => implode( "\r\n", $headers ),
+ 'timeout' => $this->timeout )
+ )
+ );
+
+ $fh = fopen( $this->url, "r", false, $fcontext);
+
+ // set the write back function (if we are writing to a file)
+ if( $this->target_file_path ){
+ $cwrite = new simpleFileWriter( $this->target_file_path, $this->upload_session_key );
+ if( !$cwrite->status->isOK() ){
+ wfDebug( __METHOD__ . "ERROR in setting up simpleFileWriter\n" );
+ $status = $cwrite->status;
+ return $status;
+ }
+
+ // read $fh into the simpleFileWriter (grab in 64K chunks since its likely a media file)
+ while ( !feof( $fh ) ) {
+ $contents = fread( $fh, 65536 );
+ $cwrite->callbackWriteBody( $fh, $contents );
+ }
+
+ $cwrite->close();
+ // check for simpleFileWriter error:
+ if( !$cwrite->status->isOK() ){
+ return $cwrite->status;
+ }
+ } else {
+ // read $fh into status->value
+ $status->value = @stream_get_contents( $fh );
+ }
+ //close the url file wrapper
+ fclose( $fh );
+
+ // check for "false"
+ if( $status->value === false ){
+ $status->error( 'file_get_contents-failed' );
+ }
+ return $status;
+ }
+
+}
+
+/**
+ * a simpleFileWriter with session id updates
+ */
+class simpleFileWriter {
+ var $target_file_path;
+ var $status = null;
+ var $session_id = null;
+ var $session_update_interval = 0; // how often to update the session while downloading
+
+ function simpleFileWriter( $target_file_path, $upload_session_key ){
+ $this->target_file_path = $target_file_path;
+ $this->upload_session_key = $upload_session_key;
+ $this->status = Status::newGood();
+ // open the file:
+ $this->fp = fopen( $this->target_file_path, 'w' );
+ if( $this->fp === false ){
+ $this->status = Status::newFatal( 'HTTP::could-not-open-file-for-writing' );
+ }
+ // true start time
+ $this->prevTime = time();
+ }
+
+ public function callbackWriteBody( $ch, $data_packet ){
+ global $wgMaxUploadSize;
+
+ // write out the content
+ if( fwrite( $this->fp, $data_packet ) === false ){
+ wfDebug( __METHOD__ ." ::could-not-write-to-file\n" );
+ $this->status = Status::newFatal( 'HTTP::could-not-write-to-file' );
+ return 0;
+ }
+
+ // check file size:
+ clearstatcache();
+ $this->current_fsize = filesize( $this->target_file_path );
+
+ if( $this->current_fsize > $wgMaxUploadSize ){
+ wfDebug( __METHOD__ . " ::http download too large\n" );
+ $this->status = Status::newFatal( 'HTTP::file-has-grown-beyond-upload-limit-killing: downloaded more than ' .
+ Language::formatSize( $wgMaxUploadSize ) . ' ' );
+ return 0;
+ }
+
+ // if more than session_update_interval second have passed update_session_progress
+ if( $this->upload_session_key && ( ( time() - $this->prevTime ) > $this->session_update_interval ) ) {
+ $this->prevTime = time();
+ $session_status = $this->update_session_progress();
+ if( !$session_status->isOK() ){
+ $this->status = $session_status;
+ wfDebug( __METHOD__ . ' update session failed or was canceled');
+ return 0;
+ }
+ }
+ return strlen( $data_packet );
+ }
+
+ public function update_session_progress(){
+ $status = Status::newGood();
+ // start the session
+ if( session_start() === false){
+ wfDebug( __METHOD__ . ' could not start session' );
+ exit( 0 );
+ }
+ $sd =& $_SESSION['wsDownload'][$this->upload_session_key];
+ // check if the user canceled the request:
+ if( isset( $sd['user_cancel'] ) && $sd['user_cancel'] == true ){
+ // kill the download
+ return Status::newFatal( 'user-canceled-request' );
+ }
+ // update the progress bytes download so far:
+ $sd['loaded'] = $this->current_fsize;
+ wfDebug( __METHOD__ . ': set session loaded amount to: ' . $sd['loaded'] . "\n");
+ // close down the session so we can other http queries can get session updates:
+ session_write_close();
+ return $status;
+ }
+
+ public function close(){
+ // do a final session update:
+ $this->update_session_progress();
+ // close up the file handle:
+ if( false === fclose( $this->fp ) ){
+ $this->status = Status::newFatal( 'HTTP::could-not-close-file' );
+ }
+ }
+