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AbstractHttpTransport.java
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AbstractHttpTransport.java
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/**
* The MIT License
* Copyright (c) 2010 Tad Glines
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.glines.socketio.server.transport;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.glines.socketio.server.SocketIOSession;
import com.glines.socketio.server.SocketIOSession.SessionTransportHandler;
import com.glines.socketio.server.Transport;
public abstract class AbstractHttpTransport extends AbstractTransport {
/**
* This is a sane default based on the timeout values of various browsers.
*/
public static final long HTTP_REQUEST_TIMEOUT = 30*1000;
/**
* The amount of time the session will wait before trying to send a ping.
* Using a value of half the HTTP_REQUEST_TIMEOUT should be good enough.
*/
public static final long HEARTBEAT_DELAY = HTTP_REQUEST_TIMEOUT/2;
/**
* This specifies how long to wait for a pong (ping response).
*/
public static final long HEARTBEAT_TIMEOUT = 10*1000;
/**
* For non persistent connection transports, this is the amount of time to wait
* for messages before returning empty results.
*/
public static long REQUEST_TIMEOUT = 20*1000;
protected static final String SESSION_KEY = "com.glines.socketio.server.AbstractHttpTransport.Session";
public AbstractHttpTransport() {
}
protected abstract SocketIOSession connect(
HttpServletRequest request,
HttpServletResponse response,
Transport.InboundFactory inboundFactory,
SocketIOSession.Factory sessionFactory) throws IOException;
@Override
public void handle(HttpServletRequest request,
HttpServletResponse response,
Transport.InboundFactory inboundFactory,
SocketIOSession.Factory sessionFactory)
throws IOException {
Object obj = request.getAttribute(SESSION_KEY);
SocketIOSession session = null;
if (obj != null) {
session = (SocketIOSession)obj;
} else {
String sessionId = extractSessionId(request);
if (sessionId != null) {
session = sessionFactory.getSession(sessionId);
}
}
if (session != null) {
SessionTransportHandler handler = session.getTransportHandler();
if (handler != null) {
handler.handle(request, response, session);
} else {
session.onShutdown();
response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
}
} else {
if ("GET".equals(request.getMethod())) {
session = connect(request, response, inboundFactory, sessionFactory);
if (session == null) {
response.sendError(HttpServletResponse.SC_SERVICE_UNAVAILABLE);
}
} else {
response.sendError(HttpServletResponse.SC_BAD_REQUEST);
}
}
}
}