XhrConnection (vaadin-all 7.7.46 API)

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

All Methods Static Methods Instance Methods Concrete Methods
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`	`send(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
  - 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(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)
```