com.vaadin.client.communication.XhrConnection API 8.27.7 | Vaadin

com.vaadin.client.communication.

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
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(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
  - 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)
```