HTTPService

套件	mx.rpc.http.mxml
類別	public class HTTPService
繼承	HTTPService HTTPService AbstractInvoker EventDispatcher Object
實作	IMXMLSupport, IMXMLObject

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

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.

MXML 語法

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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.

檢視範例

公用屬性

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	屬性		定義自
		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 類別物件的參照或是特定物件實體的建構函數。	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 [覆寫] [唯讀] The result of the last invocation.	HTTPService
		makeObjectsBindable : Boolean [覆寫] 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

公用方法

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	方法		定義自
		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 會在 EventDispatcher 物件註冊事件偵聽程式，以便讓偵聽程式收到事件的通知。	EventDispatcher
		cancel(id:String = null):mx.rpc:AsyncToken [覆寫] Cancels the last service invocation or an invokation with the specified ID.	HTTPService
		clearResult(fireBindingEvent:Boolean = true):void [覆寫] Sets the result property of the invoker to null.	HTTPService
		disconnect():void Disconnects the service's network connection.	HTTPService
		dispatchEvent(event:Event):Boolean 會將事件傳送到事件流程。	EventDispatcher
		hasEventListener(type:String):Boolean 會檢查 EventDispatcher 物件是否有對特定的事件類型註冊偵聽程式。	EventDispatcher
		hasOwnProperty(name:String):Boolean 指出物件是否有已定義的指定屬性。	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 指出 Object 類別的實體是否位於指定為參數的物件原型鏈中。	Object
		logout():void Logs the user out of the destination.	HTTPService
		propertyIsEnumerable(name:String):Boolean 指出指定的屬性是否存在，以及是否可列舉。	Object
		removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void 會從 EventDispatcher 物件移除偵聽程式。	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 為迴圈作業設定動態屬性的可用性。	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 傳回代表此物件的字串，根據地區特定慣例進行格式化。	Object
		toString():String 會傳回指定之物件的字串形式。	Object
		valueOf():Object 會傳回指定之物件的基本值。	Object
		willTrigger(type:String):Boolean 檢查此 EventDispatcher 物件是否已註冊事件偵聽程式，或者此物件的任何祖系已為特定事件類型註冊事件偵聽程式。	EventDispatcher

事件

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	摘要	定義自
activate	[廣播事件] 當 Flash Player 或 AIR 應用程式取得作業系統焦點並成為作用中時傳送。	EventDispatcher
deactivate	[廣播事件] 當 Flash Player 或 AIR 應用程式失去作業系統焦點並成為非作用中時傳送。	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

公用常數

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	常數		定義自

建構函式詳細資料

()

建構函式

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

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

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.

參數

	`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.

方法詳細資訊

initialized

()

方法

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

語言版本:

ActionScript 3.0

產品版本:

Flex 3

執行階段版本:

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.

參數

	`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.

範例如何使用本範例

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

類別 x

HTTPService

initialized