Packagemx.rpc.http
Classpublic class HTTPService
InheritanceHTTPService Inheritance AbstractInvoker Inheritance flash.events.EventDispatcher
Subclasses HTTPService

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

You use the HTTPService class to represent an HTTPService object in ActionScript. When you call the HTTPService object's send() method, it makes an HTTP request to the specified URL, and an HTTP response is returned. Optionally, you can pass parameters to the specified URL. When you do not go through the server-based proxy service, you can use only HTTP GET or POST methods. However, when you set the useProxy property to true and you use the server-based proxy service, you can also use the HTTP HEAD, OPTIONS, TRACE, and DELETE methods.

Note: Due to a software limitation, HTTPService does not generate user-friendly error messages when using GET.

See also

mx.rpc.http.mxml.HTTPService


Public Properties
 PropertyDefined By
  channelSet : ChannelSet
Provides access to the ChannelSet used by the service.
HTTPService
  concurrency : String
Value that indicates how to handle multiple calls to the same service.
HTTPService
  contentType : String
Type of content for service requests.
HTTPService
  destination : String
An HTTPService destination name in the services-config.xml file.
HTTPService
  headers : Object
Custom HTTP headers to be sent to the third party endpoint.
HTTPService
 InheritedkeepLastResult : Boolean
Flag indicating whether the operation should keep its last call result for later access.
AbstractInvoker
  lastResult : Object
[override] [read-only] The result of the last invocation.
HTTPService
  makeObjectsBindable : Boolean
[override] When this value is true, anonymous objects returned are forced to bindable objects.
HTTPService
  method : String
HTTP method for sending the request.
HTTPService
 InheritedoperationManager : Function
This property is set usually by framework code which wants to modify the behavior of a service invocation without modifying the way in which the service is called externally.
AbstractInvoker
  request : Object
Object of name-value pairs used as parameters to the URL.
HTTPService
  requestTimeout : int
Provides access to the request timeout in seconds for sent messages.
HTTPService
 InheritedresultElementType : Class
Like resultType, used to define the ActionScript class used by a given operation though this property only applies to operations which return a multi-valued result (e.g.
AbstractInvoker
  resultFormat : String
Value that indicates how you want to deserialize the result returned by the HTTP call.
HTTPService
 InheritedresultType : Class
Specifies an optional return type for the operation.
AbstractInvoker
  rootURL : String
The URL that the HTTPService object should use when computing relative URLs.
HTTPService
  serializationFilter : SerializationFilter
Provides an adapter which controls the process of converting the HTTP response body into ActionScript objects and/or turning the parameters or body into the contentType, URL, and and post body of the HTTP request.
HTTPService
  showBusyCursor : Boolean
If true, a busy cursor is displayed while a service is executing.
HTTPService
  url : String
Location of the service.
HTTPService
  useProxy : Boolean
Specifies whether to use the Flex proxy service.
HTTPService
  xmlDecode : Function
ActionScript function used to decode a service result from XML.
HTTPService
  xmlEncode : Function
ActionScript function used to encode a service request as XML.
HTTPService
Public Methods
 MethodDefined By
  
HTTPService(rootURL:String = null, destination:String = null)
Creates a new HTTPService.
HTTPService
  
cancel(id:String = null):AsyncToken
[override] Cancels the last service invocation or an invokation with the specified ID.
HTTPService
  
clearResult(fireBindingEvent:Boolean = true):void
[override] Sets the result property of the invoker to null.
HTTPService
  
disconnect():void
Disconnects the service's network connection.
HTTPService
  
logout():void
Logs the user out of the destination.
HTTPService
  
send(parameters:Object = null):AsyncToken
Executes an HTTPService request.
HTTPService
  
setCredentials(username:String, password:String, charset:String = null):void
Sets the credentials for the destination accessed by the service.
HTTPService
  
setRemoteCredentials(remoteUsername:String, remotePassword:String, charset:String = null):void
The username and password to authenticate a user when accessing the HTTP URL.
HTTPService
 Inherited
setResult(result:Object):void
This hook is exposed to update the lastResult property.
AbstractInvoker
Events
 Event Summary Defined By
  Dispatched when an HTTPService call fails.HTTPService
  The invoke event is fired when an HTTPService call is invoked so long as an Error is not thrown before the Channel attempts to send the message.HTTPService
  Dispatched when an HTTPService call returns successfully.HTTPService
Public Constants
 ConstantDefined By
  CONTENT_TYPE_FORM : String = application/x-www-form-urlencoded
[static] Indicates that the data being sent by the HTTP service is encoded as application/x-www-form-urlencoded.
HTTPService
  CONTENT_TYPE_XML : String = application/xml
[static] Indicates that the data being sent by the HTTP service is encoded as application/xml.
HTTPService
  DEFAULT_DESTINATION_HTTP : String = DefaultHTTP
[static] Indicates that the HTTPService object uses the DefaultHTTP destination.
HTTPService
  DEFAULT_DESTINATION_HTTPS : String = DefaultHTTPS
[static] Indicates that the HTTPService object uses the DefaultHTTPS destination.
HTTPService
  ERROR_DECODING : String = Client.CouldNotDecode
[static] Indicates that an XML formatted result could not be parsed into an XML instance or decoded into an Object.
HTTPService
  ERROR_ENCODING : String = Client.CouldNotEncode
[static] Indicates that an input parameter could not be encoded as XML.
HTTPService
  ERROR_URL_REQUIRED : String = Client.URLRequired
[static] Indicates that the useProxy property was set to false but a url was not provided.
HTTPService
  RESULT_FORMAT_ARRAY : String = array
[static] The result format "array" is similar to "object" however the value returned is always an Array such that if the result returned from result format "object" is not an Array already the item will be added as the first item to a new Array.
HTTPService
  RESULT_FORMAT_E4X : String = e4x
[static] The result format "e4x" specifies that the value returned is an XML instance, which can be accessed using ECMAScript for XML (E4X) expressions.
HTTPService
  RESULT_FORMAT_FLASHVARS : String = flashvars
[static] The result format "flashvars" specifies that the value returned is text containing name=value pairs separated by ampersands, which is parsed into an ActionScript object.
HTTPService
  RESULT_FORMAT_OBJECT : String = object
[static] The result format "object" specifies that the value returned is XML but is parsed as a tree of ActionScript objects.
HTTPService
  RESULT_FORMAT_TEXT : String = text
[static] The result format "text" specifies that the HTTPService result text should be an unprocessed String.
HTTPService
  RESULT_FORMAT_XML : String = xml
[static] The result format "xml" specifies that results should be returned as an flash.xml.XMLNode instance pointing to the first child of the parent flash.xml.XMLDocument.
HTTPService
Property Detail
channelSetproperty
channelSet:ChannelSet

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Provides access to the ChannelSet used by the service. The ChannelSet can be manually constructed and assigned, or it will be dynamically created to use the configured Channels for the destination for this service.


Implementation
    public function get channelSet():ChannelSet
    public function set channelSet(value:ChannelSet):void
concurrencyproperty 
concurrency:String

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Value that indicates how to handle multiple calls to the same service. The default value is multiple. The following values are permitted:


Implementation
    public function get concurrency():String
    public function set concurrency(value:String):void
contentTypeproperty 
contentType:String

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Type of content for service requests. The default is application/x-www-form-urlencoded which sends requests like a normal HTTP POST with name-value pairs. application/xml send requests as XML.


Implementation
    public function get contentType():String
    public function set contentType(value:String):void
destinationproperty 
destination:String

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

An HTTPService destination name in the services-config.xml file. When unspecified, Flex uses the DefaultHTTP destination. If you are using the url property, but want requests to reach the proxy over HTTPS, specify DefaultHTTPS.


Implementation
    public function get destination():String
    public function set destination(value:String):void
headersproperty 
headers:Object

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Custom HTTP headers to be sent to the third party endpoint. If multiple headers need to be sent with the same name the value should be specified as an Array.


Implementation
    public function get headers():Object
    public function set headers(value:Object):void
lastResultproperty 
lastResult:Object  [read-only] [override]

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The result of the last invocation.

This property can be used as the source for data binding.


Implementation
    public function get lastResult():Object
makeObjectsBindableproperty 
makeObjectsBindable:Boolean[override]

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

When this value is true, anonymous objects returned are forced to bindable objects.


Implementation
    public function get makeObjectsBindable():Boolean
    public function set makeObjectsBindable(value:Boolean):void
methodproperty 
method:String

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

HTTP method for sending the request. Permitted values are GET, POST, HEAD, OPTIONS, PUT, TRACE and DELETE. Lowercase letters are converted to uppercase letters. The default value is GET.


Implementation
    public function get method():String
    public function set method(value:String):void
requestproperty 
request:Object

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Object of name-value pairs used as parameters to the URL. If the contentType property is set to application/xml, it should be an XML document.


Implementation
    public function get request():Object
    public function set request(value:Object):void
requestTimeoutproperty 
requestTimeout:int

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Provides access to the request timeout in seconds for sent messages. A value less than or equal to zero prevents request timeout.


Implementation
    public function get requestTimeout():int
    public function set requestTimeout(value:int):void
resultFormatproperty 
resultFormat:String

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Value that indicates how you want to deserialize the result returned by the HTTP call. The value for this is based on the following:

The default value is object. The following values are permitted:


Implementation
    public function get resultFormat():String
    public function set resultFormat(value:String):void
rootURLproperty 
rootURL:String

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The URL that the HTTPService object should use when computing relative URLs. This property is only used when going through the proxy. When the useProxy property is set to false, the relative URL is computed automatically based on the location of the SWF running this application. If not set explicitly rootURL is automatically set to the URL of mx.messaging.config.LoaderConfig.url.


Implementation
    public function get rootURL():String
    public function set rootURL(value:String):void
serializationFilterproperty 
serializationFilter:SerializationFilter

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Provides an adapter which controls the process of converting the HTTP response body into ActionScript objects and/or turning the parameters or body into the contentType, URL, and and post body of the HTTP request. This can also be set indirectly by setting the resultFormat by registering a SerializationFilter using the static method: SerializationFilter.registerFilterForResultFormat("formatName", filter)


Implementation
    public function get serializationFilter():SerializationFilter
    public function set serializationFilter(value:SerializationFilter):void
showBusyCursorproperty 
showBusyCursor:Boolean

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

If true, a busy cursor is displayed while a service is executing. The default value is false.


Implementation
    public function get showBusyCursor():Boolean
    public function set showBusyCursor(value:Boolean):void
urlproperty 
url:String

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Location of the service. If you specify the url and a non-default destination, your destination in the services-config.xml file must allow the specified URL.


Implementation
    public function get url():String
    public function set url(value:String):void
useProxyproperty 
useProxy:Boolean

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Specifies whether to use the Flex proxy service. The default value is false. If you do not specify true to proxy requests though the Flex server, you must ensure that the player can reach the target URL. You also cannot use destinations defined in the services-config.xml file if the useProxy property is set to false.

The default value is false.


Implementation
    public function get useProxy():Boolean
    public function set useProxy(value:Boolean):void
xmlDecodeproperty 
xmlDecode:Function

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

ActionScript function used to decode a service result from XML. When the resultFormat is an object and the xmlDecode property is set, Flex uses the XML that the HTTPService returns to create an Object. If it is not defined the default XMLDecoder is used to do the work.

The function referenced by the xmlDecode property must take a flash.xml.XMLNode object as a parameter and should return an Object. It can return any type of object, but it must return something. Returning null or undefined causes a fault.

The following example shows an <mx:HTTPService> tag that specifies an xmlDecode function:
   <mx:HTTPService id="hs" xmlDecode="xmlDecoder" url="myURL" resultFormat="object" contentType="application/xml">
        <mx:request><source/>
            <obj>{RequestObject}</obj>
        </mx:request>
   </mx:HTTPService>
The following example shows an xmlDecoder function:
function xmlDecoder (myXML)
{
 // Simplified decoding logic.
 var myObj = {};
 myObj.name = myXML.firstChild.nodeValue;
 myObj.honorific = myXML.firstChild.attributes.honorific;
 return myObj;
}


Implementation
    public function get xmlDecode():Function
    public function set xmlDecode(value:Function):void
xmlEncodeproperty 
xmlEncode:Function

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

ActionScript function used to encode a service request as XML. When the contentType of a request is application/xml and the request object passed in is an Object, Flex attempts to use the function specified in the xmlEncode property to turn it into a flash.xml.XMLNode object If the xmlEncode property is not set, Flex uses the default XMLEncoder to turn the object graph into a flash.xml.XMLNode object.

The xmlEncode property takes an Object and should return a flash.xml.XMLNode object. In this case, the XMLNode object can be a flash.xml.XML object, which is a subclass of XMLNode, or the first child of the flash.xml.XML object, which is what you get from an <mx:XML> tag. Returning the wrong type of object causes a fault. The following example shows an <mx:HTTPService> tag that specifies an xmlEncode function:

  <mx:HTTPService id="hs" xmlEncode="xmlEncoder" url="myURL" resultFormat="object" contentType="application/xml">
        <mx:request><source/>
            <obj>{RequestObject}</obj>
        </mx:request>
   </mx:HTTPService>
    
The following example shows an xmlEncoder function:
function xmlEncoder (myObj)
{
  return new XML("");
}


Implementation
    public function get xmlEncode():Function
    public function set xmlEncode(value:Function):void
Constructor Detail
HTTPService()Constructor
public function HTTPService(rootURL:String = null, destination:String = null)

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Creates a new HTTPService. If you expect the service to send using relative URLs you may wish to specify the rootURL that will be the basis for determining the full URL (one example would be Application.application.url).

Parameters
rootURL:String (default = null) — The URL the HTTPService should use when computing relative URLS.
 
destination:String (default = null) — An HTTPService destination name in the service-config.xml file.
Method Detail
cancel()method
override public function cancel(id:String = null):AsyncToken

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Cancels the last service invocation or an invokation with the specified ID. Even though the network operation may still continue, no result or fault event is dispatched.

Parameters

id:String (default = null) — The messageId of the invocation to cancel. Optional. If omitted, the last service invocation is canceled.

Returns
AsyncToken — The AsyncToken associated with the call that is cancelled or null if no call was cancelled.
clearResult()method 
override public function clearResult(fireBindingEvent:Boolean = true):void

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Sets the result property of the invoker to null. This is useful when the result is a large object that is no longer being used.

Parameters

fireBindingEvent:Boolean (default = true) — Set to true if you want anything bound to the result to update. Otherwise, set to false. The default value is true

disconnect()method 
public function disconnect():void

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Disconnects the service's network connection. This method does not wait for outstanding network operations to complete.

logout()method 
public function logout():void

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Logs the user out of the destination. Logging out of a destination applies to everything connected using the same channel as specified in the server configuration. For example, if you're connected over the my-rtmp channel and you log out using one of your RPC components, anything that was connected over my-rtmp is logged out.

Note: Adobe recommends that you use the mx.messaging.ChannelSet.logout() method rather than this method.

See also

send()method 
public function send(parameters:Object = null):AsyncToken

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Executes an HTTPService request. The parameters are optional, but if specified should be an Object containing name-value pairs or an XML object depending on the contentType.

Parameters

parameters:Object (default = null) — An Object containing name-value pairs or an XML object, depending on the content type for service requests.

Returns
AsyncToken — An object representing the asynchronous completion token. It is the same object available in the result or fault event's token property.
setCredentials()method 
public function setCredentials(username:String, password:String, charset:String = null):void

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Sets the credentials for the destination accessed by the service. The credentials are applied to all services connected over the same ChannelSet. Note that services that use a proxy to a remote destination will need to call the setRemoteCredentials() method instead.

Parameters

username:String — the username for the destination.
 
password:String — the password for the destination.
 
charset:String (default = null) — The character set encoding to use while encoding the credentials. The default is null, which implies the legacy charset of ISO-Latin-1. The only other supported charset is "UTF-8".

setRemoteCredentials()method 
public function setRemoteCredentials(remoteUsername:String, remotePassword:String, charset:String = null):void

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The username and password to authenticate a user when accessing the HTTP URL. These are passed as part of the HTTP Authorization header from the proxy to the endpoint. If the useProxy property is set to is false, this property is ignored.

Parameters

remoteUsername:String — the username to pass to the remote endpoint.
 
remotePassword:String — the password to pass to the remote endpoint.
 
charset:String (default = null) — The character set encoding to use while encoding the remote credentials. The default is null, which implies the legacy charset of ISO-Latin-1. The only other supported charset is "UTF-8".

Event Detail
fault Event
Event Object Type: mx.rpc.events.FaultEvent
FaultEvent.type property = mx.rpc.events.FaultEvent.FAULT

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Dispatched when an HTTPService call fails.

The FAULT event type.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelabletrue, calling preventDefault() from the associated token's responder.fault method will prevent the service or operation from dispatching this event
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
faultThe Fault object that contains the details of what caused this event.
messageThe Message associated with this event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
tokenThe token that represents the call to the method. Used in the asynchronous completion token pattern.
invoke Event  
Event Object Type: mx.rpc.events.InvokeEvent
InvokeEvent.type property = mx.rpc.events.InvokeEvent.INVOKE

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The invoke event is fired when an HTTPService call is invoked so long as an Error is not thrown before the Channel attempts to send the message.

The INVOKE event type.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
token The token that represents the indiviudal call to the method. Used in the asynchronous completion token pattern.
cancelabletrue
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
message The request Message associated with this event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
result Event  
Event Object Type: mx.rpc.events.ResultEvent
ResultEvent.type property = mx.rpc.events.ResultEvent.RESULT

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Dispatched when an HTTPService call returns successfully.

The RESULT event type.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelabletrue, preventDefault() from the associated token's responder.result method will prevent the service or operation from dispatching this event
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
message The Message associated with this event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
resultResult that the RPC call returns.
tokenThe token that represents the indiviudal call to the method. Used in the asynchronous completion token pattern.
Constant Detail
CONTENT_TYPE_FORMConstant
public static const CONTENT_TYPE_FORM:String = application/x-www-form-urlencoded

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Indicates that the data being sent by the HTTP service is encoded as application/x-www-form-urlencoded.

CONTENT_TYPE_XMLConstant 
public static const CONTENT_TYPE_XML:String = application/xml

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Indicates that the data being sent by the HTTP service is encoded as application/xml.

DEFAULT_DESTINATION_HTTPConstant 
public static const DEFAULT_DESTINATION_HTTP:String = DefaultHTTP

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Indicates that the HTTPService object uses the DefaultHTTP destination.

DEFAULT_DESTINATION_HTTPSConstant 
public static const DEFAULT_DESTINATION_HTTPS:String = DefaultHTTPS

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Indicates that the HTTPService object uses the DefaultHTTPS destination.

ERROR_DECODINGConstant 
public static const ERROR_DECODING:String = Client.CouldNotDecode

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Indicates that an XML formatted result could not be parsed into an XML instance or decoded into an Object.

ERROR_ENCODINGConstant 
public static const ERROR_ENCODING:String = Client.CouldNotEncode

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Indicates that an input parameter could not be encoded as XML.

ERROR_URL_REQUIREDConstant 
public static const ERROR_URL_REQUIRED:String = Client.URLRequired

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

Indicates that the useProxy property was set to false but a url was not provided.

RESULT_FORMAT_ARRAYConstant 
public static const RESULT_FORMAT_ARRAY:String = array

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The result format "array" is similar to "object" however the value returned is always an Array such that if the result returned from result format "object" is not an Array already the item will be added as the first item to a new Array.

RESULT_FORMAT_E4XConstant 
public static const RESULT_FORMAT_E4X:String = e4x

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The result format "e4x" specifies that the value returned is an XML instance, which can be accessed using ECMAScript for XML (E4X) expressions.

RESULT_FORMAT_FLASHVARSConstant 
public static const RESULT_FORMAT_FLASHVARS:String = flashvars

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The result format "flashvars" specifies that the value returned is text containing name=value pairs separated by ampersands, which is parsed into an ActionScript object.

RESULT_FORMAT_OBJECTConstant 
public static const RESULT_FORMAT_OBJECT:String = object

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The result format "object" specifies that the value returned is XML but is parsed as a tree of ActionScript objects. This is the default.

RESULT_FORMAT_TEXTConstant 
public static const RESULT_FORMAT_TEXT:String = text

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The result format "text" specifies that the HTTPService result text should be an unprocessed String.

RESULT_FORMAT_XMLConstant 
public static const RESULT_FORMAT_XML:String = xml

Language Version : ActionScript 3.0
Product Version : Flex 3
Runtime Versions : Flash Player 9, AIR 1.1

The result format "xml" specifies that results should be returned as an flash.xml.XMLNode instance pointing to the first child of the parent flash.xml.XMLDocument.