HTTPService

Pacchetto	mx.rpc.http.mxml
Classe	public class HTTPService
Ereditarietà	HTTPService HTTPService AbstractInvoker EventDispatcher Object
Implementa	IMXMLSupport, IMXMLObject

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

You use the <mx:HTTPService> tag to represent an HTTPService object in an MXML file. 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.

Sintassi MXML expanded

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The <mx:HTTPService> tag accepts the following tag attributes:

 <mx:HTTPService
 Properties
 concurrency="multiple|single|last"
 contentType="application/x-www-form-urlencoded|application/xml"
 destination="DefaultHTTP"
 id="No default."
 method="GET|POST|HEAD|OPTIONS|PUT|TRACE|DELETE"
 resultFormat="object|array|xml|e4x|flashvars|text"
 showBusyCursor="false|true"
 makeObjectsBindable="false|true"
 url="No default."
 useProxy="false|true"
 xmlEncode="No default."
 xmlDecode="No default."
 
 Events
 fault="No default."
 result="No default."
 />

The <mx:HTTPService> tag can have a single <mx:request> tag under which the parameters can be specified.

Vedere gli esempi

Elementi API correlati

mx.rpc.http.HTTPService
mx.validators.Validator
mx.managers.CursorManager

Proprietà pubbliche

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	Proprietà		Definito da
		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
		constructor : Object Un riferimento all'oggetto classe o alla funzione di costruzione per una determinata istanza di oggetto.	Object
		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
		lastResult : Object [override] [sola lettura] 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
		operationManager : 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
		resultElementType : 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
		resultType : 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

Metodi pubblici

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	Metodo		Definito da
		HTTPService(rootURL:String = null, destination:String = null) Creates a new HTTPService.	HTTPService
		addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void Registra un oggetto listener di eventi con un oggetto EventDispatcher, in modo che il listener riceva la notifica di un evento.	EventDispatcher
		cancel(id:String = null):mx.rpc: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
		dispatchEvent(event:Event):Boolean Invia un evento nel flusso di eventi.	EventDispatcher
		hasEventListener(type:String):Boolean Verifica se per l'oggetto EventDispatcher sono presenti listener registrati per un tipo specifico di evento.	EventDispatcher
		hasOwnProperty(name:String):Boolean Indica se per un oggetto è definita una proprietà specifica.	Object
		initialized(document:Object, id:String):void Called after the implementing object has been created and all component properties specified on the MXML tag have been initialized.	HTTPService
		isPrototypeOf(theClass:Object):Boolean Indica se un'istanza della classe Object si trova nella catena di prototipi dell'oggetto specificato come parametro.	Object
		logout():void Logs the user out of the destination.	HTTPService
		propertyIsEnumerable(name:String):Boolean Indica se la proprietà specificata esiste ed è enumerabile.	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void Rimuove un listener dall'oggetto EventDispatcher.	EventDispatcher
		send(parameters:Object = null):mx.rpc: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
		setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Imposta la disponibilità di una proprietà dinamica per le operazioni cicliche.	Object
		setRemoteCredentials(remoteUsername:String, remotePassword:String, charset:String = null):void The username and password to authenticate a user when accessing the HTTP URL.	HTTPService
		setResult(result:Object):void This hook is exposed to update the lastResult property.	AbstractInvoker
		toLocaleString():String Restituisce la rappresentazione in formato stringa di questo oggetto, formattato in base alle convenzioni specifiche per le versioni localizzate.	Object
		toString():String Restituisce la rappresentazione in formato stringa dell'oggetto specificato.	Object
		valueOf():Object Restituisce il valore di base dell'oggetto specificato.	Object
		willTrigger(type:String):Boolean Verifica se un listener di eventi è registrato con questo oggetto EventDispatcher o qualsiasi suo antenato per il tipo di evento specificato.	EventDispatcher

Eventi

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	Riepilogo	Definito da
activate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR ottiene lo stato di attivazione del sistema operativo ed entra nello stato attivo.	EventDispatcher
deactivate	[evento di trasmissione] Inviato quando Flash Player o l'applicazione AIR perde l'attivazione del sistema operativo e sta entrando nello stato inattivo.	EventDispatcher
fault	Dispatched when an HTTPService call fails.	HTTPService
invoke	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
result	Dispatched when an HTTPService call returns successfully.	HTTPService

Costanti pubbliche

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	Costante		Definito da

Descrizione della funzione di costruzione

()

Funzione di costruzione

public function HTTPService(rootURL:String = null, destination:String = null)

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Creates a new HTTPService. This constructor is usually called by the generated code of an MXML document. You usually use the mx.rpc.http.HTTPService class to create an HTTPService in ActionScript.

Parametri

	`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.

Descrizione dei metodi

initialized

()

metodo

public function initialized(document:Object, id:String):void

Versione linguaggio:

ActionScript 3.0

Versione prodotto:

Flex 3

Versioni runtime:

Flash Player 9, AIR 1.1

Called after the implementing object has been created and all component properties specified on the MXML tag have been initialized. If you create this class in ActionScript and want it to function with validation, you must call this method and pass in the MXML document and the HTTPService's id.

Parametri

	`document:Object` — The MXML document that created this object.

	`id:String` — The identifier used by `document` to refer to this object. If the object is a deep property on document, `id` is null.

Esempi Come utilizzare questo esempio

HTTPServiceExample.mxml

<?xml version="1.0" encoding="utf-8"?>
<!-- Simple example to demonstrate the HTTPService tag. -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
     xmlns:s="library://ns.adobe.com/flex/spark" 
     xmlns:mx="library://ns.adobe.com/flex/mx"
    creationComplete="feedRequest.send();">
        
        <!-- The url property specifies the location of the requested file, 
        in this case the RSS 2.0 feed of Matt Chotin's blog. 
        As of this writing, the URL was still valid, but you should 
        check to make sure it hasn't changed. 
        You should use the latest RSS 2.0 URL listed on the right side of 
        the blog at http://www.adobe.com/go/mchotinblog. -->
        
    
    <fx:Declarations>
        <mx:HTTPService 
            id="feedRequest" 
            url="http://weblogs.macromedia.com/mchotin/index.xml" 
            useProxy="false" />
    </fx:Declarations>
        
    <mx:Panel title="HTTPService Example" height="75%" width="75%" 
        paddingTop="10" paddingBottom="10" paddingLeft="10" paddingRight="10">
            
        <mx:DataGrid id="dgPosts" height="50%" width="75%" 
            dataProvider="{feedRequest.lastResult.rss.channel.item}">
            <mx:columns>
                <mx:DataGridColumn headerText="Posts" dataField="title"/>
                <mx:DataGridColumn headerText="Date" dataField="pubDate"/>
            </mx:columns>
        </mx:DataGrid>
            
        <mx:TextArea height="50%" width="75%" htmlText="{dgPosts.selectedItem.description}"/>
    </mx:Panel>    
</s:Application>

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HTTPService - AS3 Flex

Classi x

HTTPService

initialized