PHP Stream::setTLS方法代码示例

 /**
  * Connects to the server and upgrades to TLS connection if possible
  *
  * @return void
  */
 public function connect()
 {
     // Figure out where we need to connect to
     $server = $this->getServer();
     try {
         // Get a connection to server
         $this->_stream = $this->getStream($server);
         $this->_logger->debug('Connection made');
         // Set the stream to blocking mode
         $this->_stream->setBlocking(true);
         $this->_logger->debug('Blocking enabled');
         // Attempt to send the stream start
         $this->startStream();
         $this->_logger->debug('Wait for response from server');
         // Now we will expect to get a stream tag back from the server. Not
         // sure if we're supposed to do anything with it, so we'll just drop
         // it for now. May contain the features the server supports.
         $response = $this->waitForServer('stream:stream');
         $this->_logger->debug('Received: ' . $response);
         // If the response from the server does contain a features tag, don't
         // bother querying server to get it.
         // TODO - Xpath would probably be more sensible for this, but for
         // now this'll work.
         if (strpos($response->asXml(), '<stream:features') === false) {
             // Server should now send back a features tag telling us what
             // features it supports. If it tells us to start tls then we will
             // need to change to a secure connection. It will also tell us what
             // authentication methods it supports.
             //
             // Note we check for a "features" tag rather than stream:features
             // because it is namespaced.
             $response = $this->waitForServer('features');
             $this->_logger->debug('Received: ' . $response);
         }
         // Set mechanisms based on that tag
         $this->setMechanisms($response);
         // If there was a starttls tag in there, and this connection has SSL
         // enabled, then we should tell the server that we will start up tls as
         // well.
         if (preg_match("/<starttls xmlns=('|\")urn:ietf:params:xml:ns:xmpp-tls('|\")>(<required\\/>)?<\\/starttls>/", $response->asXML()) != 0 && $this->_ssl === true) {
             $this->_logger->debug('Informing server we will start TLS');
             $message = "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>";
             $this->_stream->send($message);
             // Wait to get the proceed message back from the server
             $response = $this->waitForServer('proceed');
             $this->_logger->debug('Received: ' . $response->asXML());
             // Once we have the proceed signal from the server, we should turn
             // on TLS on the stream and send the opening stream tag again.
             $this->_stream->setTLS(true);
             $this->_logger->debug('Enabled TLS');
             // Now we need to start a new stream again.
             $this->startStream();
             // Server should now respond with start of stream and list of
             // features
             $response = $this->waitForServer('stream:stream');
             $this->_logger->debug('Received: ' . $response);
             // Set mechanisms based on that tag
             $this->setMechanisms($response);
         }
     } catch (Stream_Exception $e) {
         // A Stream Exception occured. Catch it and rethrow it as an Xmpp
         // Exception.
         throw new Xmpp_Exception('Failed to connect: ' . $e->getMessage());
     }
     return true;
 }