XMLHttpRequest (GWT Javadoc)

java.lang.Object
- com.google.gwt.core.client.JavaScriptObject
- - com.google.gwt.xhr.client.XMLHttpRequest

```
public class XMLHttpRequest
extends JavaScriptObject
```
The native XMLHttpRequest object. Most applications should use the higher- level RequestBuilder class unless they need specific functionality provided by the XMLHttpRequest object. See http://www.w3.org/TR/XMLHttpRequest//

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class XMLHttpRequest.ResponseType
The type of response expected from the XHR.

Nested Classes
Modifier and Type	Class and Description
`static class`	`XMLHttpRequest.ResponseType` The type of response expected from the XHR.

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`DONE` The DONE state is the state of the object when either the data transfer has been completed or something went wrong during the transfer (infinite redirects for instance).
`static int`	`HEADERS_RECEIVED` The HEADERS_RECEIVED state is the state of the object when all response headers have been received.
`static int`	`LOADING` The LOADING state is the state of the object when the response entity body is being received.
`static int`	`OPENED` The OPENED state is the state of the object when the open() method has been successfully invoked.
`static int`	`UNSENT` When constructed, the XMLHttpRequest object must be in the UNSENT state.

Constructor Summary

Constructors
Modifier Constructor and Description

protected XMLHttpRequest()

Constructors
Modifier	Constructor and Description
`protected`	`XMLHttpRequest()`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`abort()` Aborts the current request.
`void`	`clearOnReadyStateChange()` Clears the `ReadyStateChangeHandler`.
`static XMLHttpRequest`	`create()` Creates an XMLHttpRequest object.
`java.lang.String`	`getAllResponseHeaders()` Gets all the HTTP response headers, as a single string.
`int`	`getReadyState()` Get's the current ready-state.
`ArrayBuffer`	`getResponseArrayBuffer()` Get the response as an `ArrayBuffer`.
`java.lang.String`	`getResponseHeader(java.lang.String header)` Gets an HTTP response header.
`java.lang.String`	`getResponseText()` Gets the response text.
`java.lang.String`	`getResponseType()` Gets the response type.
`int`	`getStatus()` Gets the status code.
`java.lang.String`	`getStatusText()` Gets the status text.
`void`	`open(java.lang.String httpMethod, java.lang.String url)` Opens an asynchronous connection.
`void`	`open(java.lang.String httpMethod, java.lang.String url, java.lang.String user)` Opens an asynchronous connection.
`void`	`open(java.lang.String httpMethod, java.lang.String url, java.lang.String user, java.lang.String password)` Opens an asynchronous connection.
`void`	`send()` Initiates a request with no request data.
`void`	`send(java.lang.String requestData)` Initiates a request with data.
`void`	`setOnReadyStateChange(ReadyStateChangeHandler handler)` Sets the `ReadyStateChangeHandler` to be notified when the object's ready-state changes.
`void`	`setRequestHeader(java.lang.String header, java.lang.String value)` Sets a request header.
`void`	`setResponseType(java.lang.String responseType)` Sets the response type.
`void`	`setResponseType(XMLHttpRequest.ResponseType responseType)` Sets the response type.
`void`	`setWithCredentials(boolean withCredentials)` Sets withCredentials attribute.

Methods inherited from class com.google.gwt.core.client.JavaScriptObject
cast, createArray, createArray, createFunction, createObject, equals, hashCode, toSource, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - UNSENT
```
public static final int UNSENT
```
    When constructed, the XMLHttpRequest object must be in the UNSENT state.
    
    See Also:
    Constant Field Values
  - OPENED
```
public static final int OPENED
```
    The OPENED state is the state of the object when the open() method has been successfully invoked. During this state request headers can be set using setRequestHeader() and the request can be made using send().
    
    See Also:
    Constant Field Values
  - HEADERS_RECEIVED
```
public static final int HEADERS_RECEIVED
```
    The HEADERS_RECEIVED state is the state of the object when all response headers have been received.
    
    See Also:
    Constant Field Values
  - LOADING
```
public static final int LOADING
```
    The LOADING state is the state of the object when the response entity body is being received.
    
    See Also:
    Constant Field Values
  - DONE
```
public static final int DONE
```
    The DONE state is the state of the object when either the data transfer has been completed or something went wrong during the transfer (infinite redirects for instance).
    
    See Also:
    Constant Field Values
- Constructor Detail
  - XMLHttpRequest
```
protected XMLHttpRequest()
```
- Method Detail
  - create
```
public static XMLHttpRequest create()
```
    Creates an XMLHttpRequest object.
    
    Returns:
    the created object
  - abort
```
public final void abort()
```
    Aborts the current request.
    See http://www.w3.org/TR/XMLHttpRequest/#the-abort-method.
  - clearOnReadyStateChange
```
public final void clearOnReadyStateChange()
```
    Clears the ReadyStateChangeHandler.
    See http://www.w3.org/TR/XMLHttpRequest/#handler-xhr-onreadystatechange.
    
    See Also:
    clearOnReadyStateChange()
  - getAllResponseHeaders
```
public final java.lang.String getAllResponseHeaders()
```
    Gets all the HTTP response headers, as a single string.
    See http://www.w3.org/TR/XMLHttpRequest/#the-getallresponseheaders-method.
    
    Returns:
    the response headers.
  - getReadyState
```
public final int getReadyState()
```
    Get's the current ready-state.
    See http://www.w3.org/TR/XMLHttpRequest/#dom-xmlhttprequest-state.
    
    Returns:
    the ready-state constant
  - getResponseArrayBuffer
```
public final ArrayBuffer getResponseArrayBuffer()
```
    Get the response as an ArrayBuffer.
    
    Returns:
    an ArrayBuffer containing the response, or null if the request is in progress or failed
  - getResponseHeader
```
public final java.lang.String getResponseHeader(java.lang.String header)
```
    Gets an HTTP response header.
    See http://www.w3.org/TR/XMLHttpRequest/#the-getresponseheader-method.
    
    Parameters:
    header - the response header to be retrieved
    
    Returns:
    the header value
  - getResponseText
```
public final java.lang.String getResponseText()
```
    Gets the response text.
    See http://www.w3.org/TR/XMLHttpRequest/#the-responsetext-attribute.
    
    Returns:
    the response text
  - getResponseType
```
public final java.lang.String getResponseType()
```
    Gets the response type.
    See http://www.w3.org/TR/XMLHttpRequest/#the-responsetype-attribute
    
    Returns:
    the response type
  - getStatus
```
public final int getStatus()
```
    Gets the status code.
    See http://www.w3.org/TR/XMLHttpRequest/#the-status-attribute.
    
    Returns:
    the status code
  - getStatusText
```
public final java.lang.String getStatusText()
```
    Gets the status text.
    See http://www.w3.org/TR/XMLHttpRequest/#the-statustext-attribute.
    
    Returns:
    the status text
  - open
```
public final void open(java.lang.String httpMethod,
        java.lang.String url)
```
    Opens an asynchronous connection.
    See http://www.w3.org/TR/XMLHttpRequest/#the-open-method.
    
    Parameters:
    httpMethod - the HTTP method to use
    url - the URL to be opened
  - open
```
public final void open(java.lang.String httpMethod,
        java.lang.String url,
        java.lang.String user)
```
    Opens an asynchronous connection.
    See http://www.w3.org/TR/XMLHttpRequest/#the-open-method.
    
    Parameters:
    httpMethod - the HTTP method to use
    url - the URL to be opened
    user - user to use in the URL
  - open
```
public final void open(java.lang.String httpMethod,
        java.lang.String url,
        java.lang.String user,
        java.lang.String password)
```
    Opens an asynchronous connection.
    See http://www.w3.org/TR/XMLHttpRequest/#the-open-method.
    
    Parameters:
    httpMethod - the HTTP method to use
    url - the URL to be opened
    user - user to use in the URL
    password - password to use in the URL
  - send
```
public final void send()
```
    Initiates a request with no request data. This simply calls send(String) with null as an argument, because the no-argument send() method is unavailable on Firefox.
  - send
```
public final void send(java.lang.String requestData)
```
    Initiates a request with data. If there is no data, specify null.
    See http://www.w3.org/TR/XMLHttpRequest/#the-send-method.
    
    Parameters:
    requestData - the data to be sent with the request
  - setOnReadyStateChange
```
public final void setOnReadyStateChange(ReadyStateChangeHandler handler)
```
    Sets the ReadyStateChangeHandler to be notified when the object's ready-state changes.
    See http://www.w3.org/TR/XMLHttpRequest/#handler-xhr-onreadystatechange.
    Note: Applications must call clearOnReadyStateChange() when they no longer need this object, to ensure that it is cleaned up properly. Failure to do so will result in memory leaks on some browsers.
    
    Parameters:
    handler - the handler to be called when the ready state changes
    See Also:
    clearOnReadyStateChange()
  - setRequestHeader
```
public final void setRequestHeader(java.lang.String header,
                    java.lang.String value)
```
    Sets a request header.
    See http://www.w3.org/TR/XMLHttpRequest/#the-setrequestheader-method.
    
    Parameters:
    header - the header to be set
    value - the header's value
  - setWithCredentials
```
public final void setWithCredentials(boolean withCredentials)
```
    Sets withCredentials attribute.
    See http://www.w3.org/TR/XMLHttpRequest/#the-withcredentials-attribute.
    
    Parameters:
    withCredentials - whether to include credentials in XHR
  - setResponseType
```
public final void setResponseType(XMLHttpRequest.ResponseType responseType)
```
    Sets the response type.
    See http://www.w3.org/TR/XMLHttpRequest/#the-responsetype-attribute
    
    Parameters:
    responseType - the type of response desired. See XMLHttpRequest.ResponseType for limitations on using the different values
  - setResponseType
```
public final void setResponseType(java.lang.String responseType)
```
    Sets the response type.
    See http://www.w3.org/TR/XMLHttpRequest/#the-responsetype-attribute
    
    Parameters:
    responseType - the type of response desired. See XMLHttpRequest.ResponseType for limitations on using the different values

Class XMLHttpRequest

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class com.google.gwt.core.client.JavaScriptObject

Methods inherited from class java.lang.Object

Field Detail

UNSENT

OPENED

HEADERS_RECEIVED

LOADING

DONE

Constructor Detail

XMLHttpRequest

Method Detail

create

abort

clearOnReadyStateChange

getAllResponseHeaders

getReadyState

getResponseArrayBuffer

getResponseHeader

getResponseText

getResponseType

getStatus

getStatusText

open

open

open

send

send

setOnReadyStateChange

setRequestHeader

setWithCredentials

setResponseType

setResponseType