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package org.atmosphere.gwt.client.impl;
import com.google.gwt.core.client.JavaScriptException;
import com.google.gwt.http.client.RequestException;
import com.google.gwt.http.client.Response;
import com.google.gwt.user.client.Cookies;
import com.google.gwt.user.client.rpc.StatusCodeException;
import org.atmosphere.gwt.client.TimeoutException;
/**
*
* @author p.havelaar
*/
public class IEXDomainRequestCometTransport extends StreamingProtocolTransport {
@Override
public void connect(int connectionCount) {
init();
try {
transportRequest = XDomainRequest.create();
transportRequest.setListener(xDomainRequestListener);
transportRequest.openGET(getUrl(connectionCount));
transportRequest.send();
} catch (JavaScriptException ex) {
if (transportRequest != null) {
transportRequest.abort();
transportRequest = null;
}
listener.onError(new RequestException(ex.getMessage()), false);
}
}
@Override
public void disconnect() {
aborted = true;
expectingDisconnection = true;
super.disconnect();
if (transportRequest != null) {
transportRequest.clearListener();
transportRequest.abort();
transportRequest = null;
}
listener.onDisconnected();
}
/**
* add a session cookie to the url
* @param connectionCount
* @return
*/
@Override
public String getUrl(int connectionCount) {
String url = super.getUrl(connectionCount);
// Detect if we have a session in a cookie and pass it on the url, because XDomainRequest does not
// send cookies
if (url.toLowerCase().contains(";jsessionid") == false) {
String sessionid = Cookies.getCookie("JSESSIONID");
if (sessionid != null) {
String parm = ";jsessionid=" + sessionid;
int p = url.indexOf('?');
if (p > 0) {
return url.substring(0, p) + parm + url.substring(p);
} else {
return url + parm;
}
}
}
if (!url.toUpperCase().contains("PHPSESSID")) {
String sessionid = Cookies.getCookie("PHPSESSID");
if (sessionid != null) {
int p = url.indexOf('?');
String param = "PHPSESSID=" + sessionid;
if (p > 0) {
return url.substring(0, p + 1) + param + "&" + url.substring(p + 1);
} else {
return url + "?" + param;
}
}
}
return url;
}
private XDomainRequest transportRequest;
private XDomainRequestListener xDomainRequestListener = new XDomainRequestListener() {
@Override
public void onError(XDomainRequest request) {
if (isCurrent(request)) {
expectingDisconnection = true;
listener.onError(new StatusCodeException(Response.SC_INTERNAL_SERVER_ERROR, ""), true);
transportRequest = null;
}
}
@Override
public void onLoad(XDomainRequest request, String responseText) {
request.clearListener();
if (isCurrent(request)) {
transportRequest = null;
if (!aborted) {
onReceiving(Response.SC_OK, responseText, false);
}
}
}
@Override
public void onProgress(XDomainRequest request, String responseText) {
if (!aborted && isCurrent(request)) {
onReceiving(Response.SC_OK, responseText, true);
} else {
request.clearListener();
request.abort();
if (isCurrent(request)) {
transportRequest = null;
}
}
}
@Override
public void onTimeout(XDomainRequest request) {
if (isCurrent(request)) {
if (!expectingDisconnection) {
listener.onError(
new TimeoutException("Unexpected connection timeout", request.getTimeout())
, false);
}
}
}
public boolean isCurrent(XDomainRequest request) {
return request == transportRequest;
}
};
}