org.atmosphere.gwt.client.impl.IEHTMLFileCometTransport Maven / Gradle / Ivy
/*
* Copyright 2013 Jeanfrancois Arcand
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
/*
* Copyright 2009 Richard Zschech.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package org.atmosphere.gwt.client.impl;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.dom.client.IFrameElement;
/**
* This class uses IE's ActiveX "htmlfile" with an embedded iframe to stream events.
* http://cometdaily.com/2007/11/18/ie-activexhtmlfile-transport-part-ii/
*
* The main issue with this implementation is that we can't detect initial connection errors. A connection timer is
* setup to detect this.
*
* Another issues is that the memory required for the iframe constantly grows so the server occasionally disconnects the
* client who then reestablishes the connection with an empty iframe. To alleviate the issue the client removes script
* tags as the messages in them have been processed.
*
* The protocol for this transport is a stream of