Location: PHPKode > projects > Taxonomic Search Engine > lib/class.soap_transport_http.php
<?php









/**

* transport class for sending/receiving data via HTTP and HTTPS

* NOTE: PHP must be compiled with the CURL extension for HTTPS support

*

* @author   Dietrich Ayala <hide@address.com>

* @version  $Id: class.soap_transport_http.php,v 1.1.1.1 2005/05/19 10:31:10 rdmpage Exp $

* @access public

*/

class soap_transport_http extends nusoap_base {



	var $url = '';

	var $uri = '';

	var $scheme = '';

	var $host = '';

	var $port = '';

	var $path = '';

	var $request_method = 'POST';

	var $protocol_version = '1.0';

	var $encoding = '';

	var $outgoing_headers = array();

	var $incoming_headers = array();

	var $outgoing_payload = '';

	var $incoming_payload = '';

	var $useSOAPAction = true;

	var $persistentConnection = false;

	var $ch = false;	// cURL handle

	var $username;

	var $password;

	

	/**

	* constructor

	*/

	function soap_transport_http($url){

		$this->url = $url;

		

		$u = parse_url($url);

		foreach($u as $k => $v){

			$this->debug("$k = $v");

			$this->$k = $v;

		}

		

		// add any GET params to path

		if(isset($u['query']) && $u['query'] != ''){

            $this->path .= '?' . $u['query'];

		}

		

		// set default port

		if(!isset($u['port'])){

			if($u['scheme'] == 'https'){

				$this->port = 443;

			} else {

				$this->port = 80;

			}

		}

		

		$this->uri = $this->path;

		

		// build headers

		ereg('\$Revisio' . 'n: ([^ ]+)', $this->revision, $rev);

		$this->outgoing_headers['User-Agent'] = $this->title.'/'.$this->version.' ('.$rev[1].')';

		if (!isset($u['port'])) {

			$this->outgoing_headers['Host'] = $this->host;

		} else {

			$this->outgoing_headers['Host'] = $this->host.':'.$this->port;

		}

		

		if (isset($u['user']) && $u['user'] != '') {

			$this->setCredentials($u['user'], isset($u['pass']) ? $u['pass'] : '');

		}

	}

	

	function connect($connection_timeout=0,$response_timeout=30){

	  	// For PHP 4.3 with OpenSSL, change https scheme to ssl, then treat like

	  	// "regular" socket.

	  	// TODO: disabled for now because OpenSSL must be *compiled* in (not just

	  	//       loaded), and until PHP5 stream_get_wrappers is not available.

//	  	if ($this->scheme == 'https') {

//		  	if (version_compare(phpversion(), '4.3.0') >= 0) {

//		  		if (extension_loaded('openssl')) {

//		  			$this->scheme = 'ssl';

//		  			$this->debug('Using SSL over OpenSSL');

//		  		}

//		  	}

//		}

		$this->debug("connect connection_timeout $connection_timeout, response_timeout $response_timeout, scheme $this->scheme, host $this->host, port $this->port");

	  if ($this->scheme == 'http' || $this->scheme == 'ssl') {

		// use persistent connection

		if($this->persistentConnection && isset($this->fp) && is_resource($this->fp)){

			if (!feof($this->fp)) {

				$this->debug('Re-use persistent connection');

				return true;

			}

			fclose($this->fp);

			$this->debug('Closed persistent connection at EOF');

		}



		// munge host if using OpenSSL

		if ($this->scheme == 'ssl') {

			$host = 'ssl://' . $this->host;

		} else {

			$host = $this->host;

		}

		$this->debug('calling fsockopen with host ' . $host);



		// open socket

		if($connection_timeout > 0){

			$this->fp = @fsockopen( $host, $this->port, $this->errno, $this->error_str, $connection_timeout);

		} else {

			$this->fp = @fsockopen( $host, $this->port, $this->errno, $this->error_str);

		}

		

		// test pointer

		if(!$this->fp) {

			$msg = 'Couldn\'t open socket connection to server ' . $this->url;

			if ($this->errno) {

				$msg .= ', Error ('.$this->errno.'): '.$this->error_str;

			} else {

				$msg .= ' prior to connect().  This is often a problem looking up the host name.';

			}

			$this->debug($msg);

			$this->setError($msg);

			return false;

		}

		

		// set response timeout

		socket_set_timeout( $this->fp, $response_timeout);



		$this->debug('socket connected');

		return true;

	  } else if ($this->scheme == 'https') {

		if (!extension_loaded('curl')) {

			$this->setError('CURL Extension, or OpenSSL extension w/ PHP version >= 4.3 is required for HTTPS');

			return false;

		}

		$this->debug('connect using https');

		// init CURL

		$this->ch = curl_init();

		// set url

		$hostURL = ($this->port != '') ? "https://$this->host:$this->port" : "https://$this->host";

		// add path

		$hostURL .= $this->path;

		curl_setopt($this->ch, CURLOPT_URL, $hostURL);

		// ask for headers in the response output

		curl_setopt($this->ch, CURLOPT_HEADER, 1);

		// ask for the response output as the return value

		curl_setopt($this->ch, CURLOPT_RETURNTRANSFER, 1);

		// encode

		// We manage this ourselves through headers and encoding

//		if(function_exists('gzuncompress')){

//			curl_setopt($this->ch, CURLOPT_ENCODING, 'deflate');

//		}

		// persistent connection

		if ($this->persistentConnection) {

			// The way we send data, we cannot use persistent connections, since

			// there will be some "junk" at the end of our request.

			//curl_setopt($this->ch, CURL_HTTP_VERSION_1_1, true);

			$this->persistentConnection = false;

			$this->outgoing_headers['Connection'] = 'close';

		}

		// set timeout (NOTE: cURL does not have separate connection and response timeouts)

		if ($connection_timeout != 0) {

			curl_setopt($this->ch, CURLOPT_TIMEOUT, $connection_timeout);

		}



		// recent versions of cURL turn on peer/host checking by default,

		// while PHP binaries are not compiled with a default location for the

		// CA cert bundle, so disable peer/host checking.

//curl_setopt($this->ch, CURLOPT_CAINFO, 'f:\php-4.3.2-win32\extensions\curl-ca-bundle.crt');		

		curl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, 0);

		curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, 0);



		/*

			TODO: support client certificates (thanks Tobias Boes)

        curl_setopt($this->ch, CURLOPT_CAINFO, '$pathToPemFiles/rootca.pem');

        curl_setopt($this->ch, CURLOPT_SSL_VERIFYPEER, 1);

        curl_setopt($this->ch, CURLOPT_SSL_VERIFYHOST, 1);

        curl_setopt($this->ch, CURLOPT_SSLCERT, '$pathToPemFiles/mycert.pem');

        curl_setopt($this->ch, CURLOPT_SSLKEY, '$pathToPemFiles/mykey.pem');

		*/

		$this->debug('cURL connection set up');

		return true;

	  } else {

		$this->setError('Unknown scheme ' . $this->scheme);

		$this->debug('Unknown scheme ' . $this->scheme);

		return false;

	  }

	}

	

	/**

	* send the SOAP message via HTTP

	*

	* @param    string $data message data

	* @param    integer $timeout set connection timeout in seconds

	* @param	integer $response_timeout set response timeout in seconds

	* @return	string data

	* @access   public

	*/

	function send($data, $timeout=0, $response_timeout=30) {

		

		$this->debug('entered send() with data of length: '.strlen($data));



		$this->tryagain = true;

		$tries = 0;

		while ($this->tryagain) {

			$this->tryagain = false;

			if ($tries++ < 2) {

				// make connnection

				if (!$this->connect($timeout, $response_timeout)){

					return false;

				}

				

				// send request

				if (!$this->sendRequest($data)){

					return false;

				}

				

				// get response

				$respdata = $this->getResponse();

			} else {

				$this->setError('Too many tries to get an OK response');

			}

		}		

		$this->debug('end of send()');

		return $respdata;

	}





	/**

	* send the SOAP message via HTTPS 1.0 using CURL

	*

	* @param    string $msg message data

	* @param    integer $timeout set connection timeout in seconds

	* @param	integer $response_timeout set response timeout in seconds

	* @return	string data

	* @access   public

	*/

	function sendHTTPS($data, $timeout=0, $response_timeout=30) {

		return $this->send($data, $timeout, $response_timeout);

	}

	

	/**

	* if authenticating, set user credentials here

	*

	* @param    string $username

	* @param    string $password

	* @param	string $authtype

	* @param	array $digestRequest

	* @access   public

	*/

	function setCredentials($username, $password, $authtype = 'basic', $digestRequest = array()) {

		global $_SERVER;



		$this->debug("Set credentials for authtype $authtype");

		// cf. RFC 2617

		if ($authtype == 'basic') {

			$this->outgoing_headers['Authorization'] = 'Basic '.base64_encode($username.':'.$password);

		} elseif ($authtype == 'digest') {

			if (isset($digestRequest['nonce'])) {

				$digestRequest['nc'] = isset($digestRequest['nc']) ? $digestRequest['nc']++ : 1;

				

				// calculate the Digest hashes (calculate code based on digest implementation found at: http://www.rassoc.com/gregr/weblog/stories/2002/07/09/webServicesSecurityHttpDigestAuthenticationWithoutActiveDirectory.html)

	

				// A1 = unq(username-value) ":" unq(realm-value) ":" passwd

				$A1 = $username. ':' . $digestRequest['realm'] . ':' . $password;

	

				// H(A1) = MD5(A1)

				$HA1 = md5($A1);

	

				// A2 = Method ":" digest-uri-value

				$A2 = 'POST:' . $this->uri;

	

				// H(A2)

				$HA2 =  md5($A2);

	

				// KD(secret, data) = H(concat(secret, ":", data))

				// if qop == auth:

				// request-digest  = <"> < KD ( H(A1),     unq(nonce-value)

				//                              ":" nc-value

				//                              ":" unq(cnonce-value)

				//                              ":" unq(qop-value)

				//                              ":" H(A2)

				//                            ) <">

				// if qop is missing,

				// request-digest  = <"> < KD ( H(A1), unq(nonce-value) ":" H(A2) ) > <">

	

				$unhashedDigest = '';

				$nonce = isset($digestRequest['nonce']) ? $digestRequest['nonce'] : '';

				$cnonce = $nonce;

				if ($digestRequest['qop'] != '') {

					$unhashedDigest = $HA1 . ':' . $nonce . ':' . sprintf("%08d", $digestRequest['nc']) . ':' . $cnonce . ':' . $digestRequest['qop'] . ':' . $HA2;

				} else {

					$unhashedDigest = $HA1 . ':' . $nonce . ':' . $HA2;

				}

	

				$hashedDigest = md5($unhashedDigest);

	

				$this->outgoing_headers['Authorization'] = 'Digest username="' . $username . '", realm="' . $digestRequest['realm'] . '", nonce="' . $nonce . '", uri="' . $this->uri . '", cnonce="' . $cnonce . '", nc=' . sprintf("%08x", $digestRequest['nc']) . ', qop="' . $digestRequest['qop'] . '", response="' . $hashedDigest . '"';

			}

		}

		$this->username = $username;

		$this->password = $password;

		$this->authtype = $authtype;

		$this->digestRequest = $digestRequest;

		

		if (isset($this->outgoing_headers['Authorization'])) {

			$this->debug('Authorization header set: ' . substr($this->outgoing_headers['Authorization'], 0, 12) . '...');

		} else {

			$this->debug('Authorization header not set');

		}

	}

	

	/**

	* set the soapaction value

	*

	* @param    string $soapaction

	* @access   public

	*/

	function setSOAPAction($soapaction) {

		$this->outgoing_headers['SOAPAction'] = '"' . $soapaction . '"';

	}

	

	/**

	* use http encoding

	*

	* @param    string $enc encoding style. supported values: gzip, deflate, or both

	* @access   public

	*/

	function setEncoding($enc='gzip, deflate'){

		$this->protocol_version = '1.1';

		$this->outgoing_headers['Accept-Encoding'] = $enc;

		$this->outgoing_headers['Connection'] = 'close';

		$this->persistentConnection = false;

		set_magic_quotes_runtime(0);

		// deprecated

		$this->encoding = $enc;

	}

	

	/**

	* set proxy info here

	*

	* @param    string $proxyhost

	* @param    string $proxyport

	* @param	string $proxyusername

	* @param	string $proxypassword

	* @access   public

	*/

	function setProxy($proxyhost, $proxyport, $proxyusername = '', $proxypassword = '') {

		$this->uri = $this->url;

		$this->host = $proxyhost;

		$this->port = $proxyport;

		if ($proxyusername != '' && $proxypassword != '') {

			$this->outgoing_headers['Proxy-Authorization'] = ' Basic '.base64_encode($proxyusername.':'.$proxypassword);

		}

	}

	

	/**

	* decode a string that is encoded w/ "chunked' transfer encoding

 	* as defined in RFC2068 19.4.6

	*

	* @param    string $buffer

	* @param    string $lb

	* @returns	string

	* @access   public

	*/

	function decodeChunked($buffer, $lb){

		// length := 0

		$length = 0;

		$new = '';

		

		// read chunk-size, chunk-extension (if any) and CRLF

		// get the position of the linebreak

		$chunkend = strpos($buffer, $lb);

		if ($chunkend == FALSE) {

			$this->debug('no linebreak found in decodeChunked');

			return $new;

		}

		$temp = substr($buffer,0,$chunkend);

		$chunk_size = hexdec( trim($temp) );

		$chunkstart = $chunkend + strlen($lb);

		// while (chunk-size > 0) {

		while ($chunk_size > 0) {

			$this->debug("chunkstart: $chunkstart chunk_size: $chunk_size");

			$chunkend = strpos( $buffer, $lb, $chunkstart + $chunk_size);

		  	

			// Just in case we got a broken connection

		  	if ($chunkend == FALSE) {

		  	    $chunk = substr($buffer,$chunkstart);

				// append chunk-data to entity-body

		    	$new .= $chunk;

		  	    $length += strlen($chunk);

		  	    break;

			}

			

		  	// read chunk-data and CRLF

		  	$chunk = substr($buffer,$chunkstart,$chunkend-$chunkstart);

		  	// append chunk-data to entity-body

		  	$new .= $chunk;

		  	// length := length + chunk-size

		  	$length += strlen($chunk);

		  	// read chunk-size and CRLF

		  	$chunkstart = $chunkend + strlen($lb);

			

		  	$chunkend = strpos($buffer, $lb, $chunkstart) + strlen($lb);

			if ($chunkend == FALSE) {

				break; //Just in case we got a broken connection

			}

			$temp = substr($buffer,$chunkstart,$chunkend-$chunkstart);

			$chunk_size = hexdec( trim($temp) );

			$chunkstart = $chunkend;

		}

		return $new;

	}

	

	/*

	 *	Writes payload, including HTTP headers, to $this->outgoing_payload.

	 */

	function buildPayload($data) {

		// add content-length header

		$this->outgoing_headers['Content-Length'] = strlen($data);

		

		// start building outgoing payload:

		$this->outgoing_payload = "$this->request_method $this->uri HTTP/$this->protocol_version\r\n";



		// loop thru headers, serializing

		foreach($this->outgoing_headers as $k => $v){

			$this->outgoing_payload .= $k.': '.$v."\r\n";

		}

		

		// header/body separator

		$this->outgoing_payload .= "\r\n";

		

		// add data

		$this->outgoing_payload .= $data;

	}



	function sendRequest($data){

		// build payload

		$this->buildPayload($data);



	  if ($this->scheme == 'http' || $this->scheme == 'ssl') {

		// send payload

		if(!fputs($this->fp, $this->outgoing_payload, strlen($this->outgoing_payload))) {

			$this->setError('couldn\'t write message data to socket');

			$this->debug('couldn\'t write message data to socket');

			return false;

		}

		$this->debug('wrote data to socket, length = ' . strlen($this->outgoing_payload));

		return true;

	  } else if ($this->scheme == 'https') {

		// set payload

		// TODO: cURL does say this should only be the verb, and in fact it

		// turns out that the URI and HTTP version are appended to this, which

		// some servers refuse to work with

		//curl_setopt($this->ch, CURLOPT_CUSTOMREQUEST, $this->outgoing_payload);

		foreach($this->outgoing_headers as $k => $v){

			$curl_headers[] = "$k: $v";

		}

		curl_setopt($this->ch, CURLOPT_HTTPHEADER, $curl_headers);

		if ($this->request_method == "POST") {

	  		curl_setopt($this->ch, CURLOPT_POST, 1);

	  		curl_setopt($this->ch, CURLOPT_POSTFIELDS, $data);

	  	} else {

	  	}

		$this->debug('set cURL payload');

		return true;

	  }

	}



	function getResponse(){

		$this->incoming_payload = '';

	    

	  if ($this->scheme == 'http' || $this->scheme == 'ssl') {

	    // loop until headers have been retrieved

	    $data = '';

	    while (!isset($lb)){



			// We might EOF during header read.

			if(feof($this->fp)) {

				$this->incoming_payload = $data;

				$this->debug('found no headers before EOF after length ' . strlen($data));

				$this->debug("received before EOF:\n" . $data);

				$this->setError('server failed to send headers');

				return false;

			}



			$tmp = fgets($this->fp, 256);

			$tmplen = strlen($tmp);

			$this->debug("read line of $tmplen bytes: " . trim($tmp));



			if ($tmplen == 0) {

				$this->incoming_payload = $data;

				$this->debug('socket read of headers timed out after length ' . strlen($data));

				$this->debug("read before timeout:\n" . $data);

				$this->setError('socket read of headers timed out');

				return false;

			}



			$data .= $tmp;

			$pos = strpos($data,"\r\n\r\n");

			if($pos > 1){

				$lb = "\r\n";

			} else {

				$pos = strpos($data,"\n\n");

				if($pos > 1){

					$lb = "\n";

				}

			}

			// remove 100 header

			if(isset($lb) && ereg('^HTTP/1.1 100',$data)){

				unset($lb);

				$data = '';

			}//

		}

		// store header data

		$this->incoming_payload .= $data;

		$this->debug('found end of headers after length ' . strlen($data));

		// process headers

		$header_data = trim(substr($data,0,$pos));

		$header_array = explode($lb,$header_data);

		$this->incoming_headers = array();

		foreach($header_array as $header_line){

			$arr = explode(':',$header_line, 2);

			if(count($arr) > 1){

				$header_name = strtolower(trim($arr[0]));

				$this->incoming_headers[$header_name] = trim($arr[1]);

			} else if (isset($header_name)) {

				$this->incoming_headers[$header_name] .= $lb . ' ' . $header_line;

			}

		}

		

		// loop until msg has been received

		if (isset($this->incoming_headers['content-length'])) {

			$content_length = $this->incoming_headers['content-length'];

			$chunked = false;

			$this->debug("want to read content of length $content_length");

		} else {

			$content_length =  2147483647;

			if (isset($this->incoming_headers['transfer-encoding']) && strtolower($this->incoming_headers['transfer-encoding']) == 'chunked') {

				$chunked = true;

				$this->debug("want to read chunked content");

			} else {

				$chunked = false;

				$this->debug("want to read content to EOF");

			}

		}

		$data = '';

		do {

			if ($chunked) {

				$tmp = fgets($this->fp, 256);

				$tmplen = strlen($tmp);

				$this->debug("read chunk line of $tmplen bytes");

				if ($tmplen == 0) {

					$this->incoming_payload = $data;

					$this->debug('socket read of chunk length timed out after length ' . strlen($data));

					$this->debug("read before timeout:\n" . $data);

					$this->setError('socket read of chunk length timed out');

					return false;

				}

				$content_length = hexdec(trim($tmp));

				$this->debug("chunk length $content_length");

			}

			$strlen = 0;

		    while (($strlen < $content_length) && (!feof($this->fp))) {

		    	$readlen = min(8192, $content_length - $strlen);

				$tmp = fread($this->fp, $readlen);

				$tmplen = strlen($tmp);

				$this->debug("read buffer of $tmplen bytes");

				if (($tmplen == 0) && (!feof($this->fp))) {

					$this->incoming_payload = $data;

					$this->debug('socket read of body timed out after length ' . strlen($data));

					$this->debug("read before timeout:\n" . $data);

					$this->setError('socket read of body timed out');

					return false;

				}

				$strlen += $tmplen;

				$data .= $tmp;

			}

			if ($chunked && ($content_length > 0)) {

				$tmp = fgets($this->fp, 256);

				$tmplen = strlen($tmp);

				$this->debug("read chunk terminator of $tmplen bytes");

				if ($tmplen == 0) {

					$this->incoming_payload = $data;

					$this->debug('socket read of chunk terminator timed out after length ' . strlen($data));

					$this->debug("read before timeout:\n" . $data);

					$this->setError('socket read of chunk terminator timed out');

					return false;

				}

			}

		} while ($chunked && ($content_length > 0) && (!feof($this->fp)));

		if (feof($this->fp)) {

			$this->debug('read to EOF');

		}

		$this->debug('read body of length ' . strlen($data));

		$this->incoming_payload .= $data;

		$this->debug('received a total of '.strlen($this->incoming_payload).' bytes of data from server');

		

		// close filepointer

		if(

			(isset($this->incoming_headers['connection']) && strtolower($this->incoming_headers['connection']) == 'close') || 

			(! $this->persistentConnection) || feof($this->fp)){

			fclose($this->fp);

			$this->fp = false;

			$this->debug('closed socket');

		}

		

		// connection was closed unexpectedly

		if($this->incoming_payload == ''){

			$this->setError('no response from server');

			return false;

		}

		

		// decode transfer-encoding

//		if(isset($this->incoming_headers['transfer-encoding']) && strtolower($this->incoming_headers['transfer-encoding']) == 'chunked'){

//			if(!$data = $this->decodeChunked($data, $lb)){

//				$this->setError('Decoding of chunked data failed');

//				return false;

//			}

			//print "<pre>\nde-chunked:\n---------------\n$data\n\n---------------\n</pre>";

			// set decoded payload

//			$this->incoming_payload = $header_data.$lb.$lb.$data;

//		}

	

	  } else if ($this->scheme == 'https') {

		// send and receive

		$this->debug('send and receive with cURL');

		$this->incoming_payload = curl_exec($this->ch);

		$data = $this->incoming_payload;



        $cErr = curl_error($this->ch);

		if ($cErr != '') {

        	$err = 'cURL ERROR: '.curl_errno($this->ch).': '.$cErr.'<br>';

			foreach(curl_getinfo($this->ch) as $k => $v){

				$err .= "$k: $v<br>";

			}

			$this->debug($err);

			$this->setError($err);

			curl_close($this->ch);

	    	return false;

		} else {

			//echo '<pre>';

			//var_dump(curl_getinfo($this->ch));

			//echo '</pre>';

		}

		// close curl

		$this->debug('No cURL error, closing cURL');

		curl_close($this->ch);

		

		// remove 100 header

		if (ereg('^HTTP/1.1 100',$data)) {

			if ($pos = strpos($data,"\r\n\r\n")) {

				$data = ltrim(substr($data,$pos));

			} elseif($pos = strpos($data,"\n\n") ) {

				$data = ltrim(substr($data,$pos));

			}

		}

		

		// separate content from HTTP headers

		if ($pos = strpos($data,"\r\n\r\n")) {

			$lb = "\r\n";

		} elseif( $pos = strpos($data,"\n\n")) {

			$lb = "\n";

		} else {

			$this->debug('no proper separation of headers and document');

			$this->setError('no proper separation of headers and document');

			return false;

		}

		$header_data = trim(substr($data,0,$pos));

		$header_array = explode($lb,$header_data);

		$data = ltrim(substr($data,$pos));

		$this->debug('found proper separation of headers and document');

		$this->debug('cleaned data, stringlen: '.strlen($data));

		// clean headers

		foreach ($header_array as $header_line) {

			$arr = explode(':',$header_line,2);

			if (count($arr) > 1) {

				$this->incoming_headers[strtolower(trim($arr[0]))] = trim($arr[1]);

			}

		}

	  }



 		// see if we need to resend the request with http digest authentication

 		if (isset($this->incoming_headers['www-authenticate']) && strstr($header_array[0], '401 Unauthorized')) {

 			$this->debug('Got 401 Unauthorized with WWW-Authenticate: ' . $this->incoming_headers['www-authenticate']);

 			if (substr("Digest ", $this->incoming_headers['www-authenticate'])) {

 				$this->debug('Server wants digest authentication');

 				// remove "Digest " from our elements

 				$digestString = str_replace('Digest ', '', $this->incoming_headers['www-authenticate']);

 				

 				// parse elements into array

 				$digestElements = explode(',', $digestString);

 				foreach ($digestElements as $val) {

 					$tempElement = explode('=', trim($val));

 					$digestRequest[$tempElement[0]] = str_replace("\"", '', $tempElement[1]);

 				}



				// should have (at least) qop, realm, nonce

 				if (isset($digestRequest['nonce'])) {

 					$this->setCredentials($this->username, $this->password, 'digest', $digestRequest);

 					$this->tryagain = true;

 					return false;

 				}

 			}

			$this->debug('HTTP authentication failed');

			$this->setError('HTTP authentication failed');

			return false;

 		}

		

		// decode content-encoding

		if(isset($this->incoming_headers['content-encoding']) && $this->incoming_headers['content-encoding'] != ''){

			if(strtolower($this->incoming_headers['content-encoding']) == 'deflate' || strtolower($this->incoming_headers['content-encoding']) == 'gzip'){

    			// if decoding works, use it. else assume data wasn't gzencoded

    			if(function_exists('gzuncompress')){

					//$timer->setMarker('starting decoding of gzip/deflated content');

					if($this->incoming_headers['content-encoding'] == 'deflate' && $degzdata = @gzuncompress($data)){

    					$data = $degzdata;

					} elseif($this->incoming_headers['content-encoding'] == 'gzip' && $degzdata = gzinflate(substr($data, 10))){	// do our best

						$data = $degzdata;

					} else {

						$this->setError('Errors occurred when trying to decode the data');

					}

					//$timer->setMarker('finished decoding of gzip/deflated content');

					//print "<xmp>\nde-inflated:\n---------------\n$data\n-------------\n</xmp>";

					// set decoded payload

					$this->incoming_payload = $header_data.$lb.$lb.$data;

    			} else {

					$this->setError('The server sent deflated data. Your php install must have the Zlib extension compiled in to support this.');

				}

			}

		}

		

		if(strlen($data) == 0){

			$this->debug('no data after headers!');

			$this->setError('no data present after HTTP headers');

			return false;

		}

		

		return $data;

	}



	function setContentType($type, $charset = false) {

		$this->outgoing_headers['Content-Type'] = $type . ($charset ? '; charset=' . $charset : '');

	}



	function usePersistentConnection(){

		if (isset($this->outgoing_headers['Accept-Encoding'])) {

			return false;

		}

		$this->protocol_version = '1.1';

		$this->persistentConnection = true;

		$this->outgoing_headers['Connection'] = 'Keep-Alive';

		return true;

	}

}





?>
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