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/*
*
* With thanks to : http://code.google.com/p/gwt-websockets
* Copyright (c)2010 Peter Bridge
*
* 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 org.atmosphere.gwt.client.impl;
import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.user.client.rpc.SerializationException;
import com.google.gwt.user.client.rpc.StatusCodeException;
import org.atmosphere.gwt.client.AtmosphereClient;
import org.atmosphere.gwt.client.AtmosphereClientException;
import java.util.Collections;
/**
*
* @author p.havelaar
*/
public class WebSocketCometTransport extends BaseCometTransport {
@Override
public void connect(int connectionCount) {
disconnect();
String url = getUrl(connectionCount);
url = url.replaceFirst("http://", "ws://");
url = url.replaceFirst("https://", "wss://");
socket = WebSocket.create(url);
socket.setListener(socketListener);
}
@Override
public void disconnect() {
if (socket != null) {
super.disconnect();
socket.close();
}
socket = null;
}
@Override
protected ServerTransport getServerTransport() {
// TODO use WebSocket send. at the moment server does not receive yet
return super.getServerTransport();
}
public static boolean hasWebSocketSupport() {
return WebSocket.isSupported();
}
private boolean connected = false;
@SuppressWarnings("unused")
private final void logError(String message) {
listener.onError(new AtmosphereClientException(message), connected);
}
private void parseMessage(String message) {
if (message.startsWith("s\n")) {
// a string message
listener.onMessage(Collections.singletonList(
HTTPRequestCometTransport.unescape(message.substring(2))));
} else if (message.startsWith("o\n")) {
// a GWT object message
try {
listener.onMessage(Collections.singletonList(parse(message.substring(2))));
}
catch (SerializationException e) {
listener.onError(e, true);
}
} else if (message.startsWith("c\n")) {
// a connection message
onConnection(message.substring(2));
}
}
private void onConnection(String message) {
if (message.startsWith("c")) {
connected = true;
String initParameters = message.substring(1);
try {
String[] params = initParameters.split(":");
connectionId = Integer.parseInt(params[1]);
listener.onConnected(Integer.parseInt(params[0]), connectionId);
}
catch (NumberFormatException e) {
listener.onError(new AtmosphereClientException("Unexpected init parameters: " + initParameters), true);
}
}
else if (message.startsWith("e")) {
disconnect();
String status = message.substring(1);
try {
int statusCode;
String statusMessage;
int index = status.indexOf(' ');
if (index == -1) {
statusCode = Integer.parseInt(status);
statusMessage = null;
}
else {
statusCode = Integer.parseInt(status.substring(0, index));
statusMessage = HTTPRequestCometTransport.unescape(status.substring(index + 1));
}
listener.onError(new StatusCodeException(statusCode, statusMessage), false);
}
catch (NumberFormatException e) {
listener.onError(new AtmosphereClientException("Unexpected status code: " + status), false);
}
}
else if (message.equals("d")) {
disconnect();
}
else if (message.equals("h")) {
listener.onHeartbeat();
}
else {
listener.onError(new AtmosphereClientException("Unexpected connection status: " + message), true);
}
}
private WebSocket socket;
private WebSocketListener socketListener = new WebSocketListener() {
@Override
public void onOpen(WebSocket socket) {
}
@Override
public void onClose(WebSocket socket) {
connected = false;
listener.onDisconnected();
}
@Override
public void onError(WebSocket socket) {
connected = false;
listener.onError(new IllegalStateException("Websocket Connection Error"), false);
}
@Override
public void onMessage(WebSocket socket, String message) {
JsArrayString messages = AtmosphereClient.split(message, "\n\n");
int len = messages.length();
for (int i=0; i < len; i++) {
parseMessage(messages.get(i));
}
}
};
}