Package com.vaadin.client.communication

Class XhrConnection

java.lang.Object

com.vaadin.client.communication.XhrConnection

public class XhrConnection
extends Object

Provides a connection to the /UIDL url on the server and knows how to send messages to that end point.

Since:

7.6

Author:

Vaadin Ltd

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	XhrConnection.XhrResponseHandler

Constructor Summary

Constructors

Constructor	Description
XhrConnection()

Method Summary

Modifier and Type	Method	Description
static void	addXsrfHeaderFromCookie(com.google.gwt.http.client.RequestBuilder rb)
protected XhrConnection.XhrResponseHandler	createResponseHandler()
protected String	getUri()	Retrieves the URI to use when sending RPCs to the server.
void	registerClosingHandler()	Register a window closing handler, utilizing the "pagehide" event instead of the onunload event as GWT does.
void	send(elemental.json.JsonObject payload)	Sends an asynchronous UIDL request to the server using the given URI.
void	setConnection(ApplicationConnection connection)	Sets the application connection this instance is connected to.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

XhrConnection

public XhrConnection()

Method Detail

registerClosingHandler

public void registerClosingHandler()

Register a window closing handler, utilizing the "pagehide" event instead of the onunload event as GWT does. This calls the usual onWindowClosing() method as the pagehide event is triggered. This method should only be called once; no effort is made to prevent it being called more than once as any approach towards that would add an additional point of failure.

setConnection

public void setConnection(ApplicationConnection connection)

Sets the application connection this instance is connected to. Called internally by the framework.

Parameters:

connection - the application connection this instance is connected to

createResponseHandler

protected XhrConnection.XhrResponseHandler createResponseHandler()

send

public void send(elemental.json.JsonObject payload)

Sends an asynchronous UIDL request to the server using the given URI.

Parameters:

payload - The URI to use for the request. May includes GET parameters

Throws:

com.google.gwt.http.client.RequestException - if the request could not be sent

getUri

protected String getUri()

Retrieves the URI to use when sending RPCs to the server.

Returns:

The URI to use for server messages.

addXsrfHeaderFromCookie

public static void addXsrfHeaderFromCookie(com.google.gwt.http.client.RequestBuilder rb)