適用於 Adobe® Flash® Platform 的 ActionScript® 3.0 參考
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語言元素

全域常數
全域函數
運算子
陳述式、關鍵字和指令
特殊類型

附錄

新增內容
編譯器錯誤
編譯器警告
執行階段錯誤
移轉至 ActionScript 3
支援的字元集
僅限 MXML 標籤
移動 XML 元素
Timed Text 標籤
不建議元素清單
AccessibilityImplementation 常數
如何使用 ActionScript 範例
法律聲明
套件flash.net
類別public final class URLRequestHeader
繼承URLRequestHeader Inheritance Object

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

URLRequestHeader 物件會封裝單一 HTTP 要求檔頭,而且包含名稱/值的配對。 URLRequestHeader 物件是在 URLRequest 類別的 requestHeaders 屬性中使用。

在 Adobe® AIR® 中,應用程式安全執行程序中的內容 (例如以 AIR 應用程式安裝的內容) 可以使用任何要求標頭,不會有錯誤。不過,對於不同安全執行程序中的 Adobe AIR 執行內容,或在 Flash® Player 中執行的內容,使用下列要求標頭會擲出執行階段錯誤,而且限制的項目不會區分大小寫 (例如,GetgetGET 都不被允許):

在 Flash Player 中以及在應用程式安全執行程序外的 Adobe AIR 內容中,下列要求標頭都無法使用,而且限制的項目也不會區分大小寫 (例如,GetgetGET 都不被允許)。此外,如果使用底線字元,則使用連字符號的術語也適用 (例如,Content-LengthContent_Length 都不被允許):

Accept-CharsetAccept-EncodingAccept-RangesAgeAllowAllowedAuthorizationCharge-ToConnectConnectionContent-LengthContent-LocationContent-RangeCookieDateDeleteETagExpectGetHeadHostIf-Modified-SinceKeep-AliveLast-ModifiedLocationMax-ForwardsOptionsOriginPostProxy-AuthenticateProxy-AuthorizationProxy-ConnectionPublicPutRangeRefererRequest-RangeRetry-AfterServerTETraceTrailerTransfer-EncodingUpgradeURIUser-AgentVaryViaWarningWWW-Authenticatex-flash-version

URLRequestHeader 物件都會具有長度上的限制。 如果 URLRequestHeader 物件的累計長度 (name 屬性加上 value 屬性的長度) 或 URLRequest.requestHeaders 屬性中使用之 URLRequestHeader 物件陣列的累計長度超過可接受的長度,就會擲出例外。

Adobe AIR 中執行的內容會將 ACCEPT 標頭設定為如下列所示,除非您在 URLRequest 類別的 requestHeaders 屬性中指定 ACCEPT 標頭的設定值:

text/xml, application/xml, application/xhtml+xml, text/html;q=0.9, text/plain;q=0.8, image/png, application/x-shockwave-flash, video/mp4;q=0.9, flv-application/octet-stream;q=0.8, video/x-flv;q=0.7, audio/mp4, */*;q=0.5

並非所有接受 URLRequest 參數的方法都會支援 requestHeaders 屬性;請參閱您要呼叫之方法的文件。例如,FileReference.upload()FileReference.download() 方法不支援 URLRequest.requestHeaders 屬性。

由於瀏覽器的限制,只有 POST 要求會支援自訂 HTTP 要求檔頭,GET 要求並不支援。

檢視範例

相關 API 元素



公用屬性
 屬性定義自
 Inheritedconstructor : Object
類別物件的參照或是特定物件實體的建構函數。
Object
  name : String
HTTP 要求檔頭名稱 (例如 Content-Type 或 SOAPAction)。
URLRequestHeader
  value : String
與 name 屬性相關聯的值 (例如 text/plain)。
URLRequestHeader
公用方法
 方法定義自
  
URLRequestHeader(name:String = "", value:String = "")
會建立新的 URLRequestHeader 物件 (會封裝單一 HTTP 要求檔頭)。
URLRequestHeader
 Inherited
指出物件是否有已定義的指定屬性。
Object
 Inherited
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
 Inherited
指出指定的屬性是否存在,以及是否可列舉。
Object
 Inherited
為迴圈作業設定動態屬性的可用性。
Object
 Inherited
傳回代表此物件的字串,根據地區特定慣例進行格式化。
Object
 Inherited
會傳回指定之物件的字串形式。
Object
 Inherited
會傳回指定之物件的基本值。
Object
屬性詳細資訊

name

屬性
public var name:String

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

HTTP 要求檔頭名稱 (例如 Content-TypeSOAPAction)。

value

屬性 
public var value:String

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

name 屬性相關聯的值 (例如 text/plain)。

建構函式詳細資料

URLRequestHeader

()建構函式
public function URLRequestHeader(name:String = "", value:String = "")

語言版本: ActionScript 3.0
執行階段版本: AIR 1.0, Flash Player 9, Flash Lite 4

會建立新的 URLRequestHeader 物件 (會封裝單一 HTTP 要求檔頭)。 URLRequestHeader 物件是在 URLRequest 類別的 requestHeaders 屬性中使用。

參數
name:String (default = "") — HTTP 要求檔頭名稱 (例如 Content-TypeSOAPAction)。
 
value:String (default = "") — 與 name 屬性相關聯的值 (例如 text/plain)。
URLRequestHeaderExample.as

下列範例會將單一 HTTP 要求檔頭 header 加入 requestHeaders 屬性的陣列。 即使有正進行要求的快取副本,檔頭也會指出應用程式應該將要求轉寄至原始伺服器。
package {
    import flash.display.Sprite;
    import flash.events.*;
    import flash.net.URLLoader;
    import flash.net.URLRequest;
    import flash.net.URLRequestHeader;
    import flash.net.URLRequestMethod;
    import flash.net.URLVariables;

    public class URLRequestHeaderExample extends Sprite {
        private var loader:URLLoader;
        
        public function URLRequestHeaderExample() {
            loader = new URLLoader();
            configureListeners(loader);

            var header:URLRequestHeader = new URLRequestHeader("pragma", "no-cache");
            var request:URLRequest = new URLRequest("http://www.[yourdomain].com/greeting.cfm");
            request.data = new URLVariables("name=John+Doe");
            request.method = URLRequestMethod.POST;
            request.requestHeaders.push(header);
            try {
                loader.load(request);
            } catch (error:Error) {
                trace("Unable to load requested document.");
            }
        }

        private function configureListeners(dispatcher:IEventDispatcher):void {
            dispatcher.addEventListener(Event.COMPLETE, completeHandler);
            dispatcher.addEventListener(Event.OPEN, openHandler);
            dispatcher.addEventListener(ProgressEvent.PROGRESS, progressHandler);
            dispatcher.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
            dispatcher.addEventListener(HTTPStatusEvent.HTTP_STATUS, httpStatusHandler);
            dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
        }

        private function completeHandler(event:Event):void {
            var loader:URLLoader = URLLoader(event.target);
            trace("completeHandler: " + loader.data);
        }

        private function openHandler(event:Event):void {
            trace("openHandler: " + event);
        }

        private function progressHandler(event:ProgressEvent):void {
            trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal);
        }

        private function securityErrorHandler(event:SecurityErrorEvent):void {
            trace("securityErrorHandler: " + event);
        }

        private function httpStatusHandler(event:HTTPStatusEvent):void {
            trace("httpStatusHandler: " + event);
        }

        private function ioErrorHandler(event:IOErrorEvent):void {
            trace("ioErrorHandler: " + event);
        }
    }
}




[ X ]為什麼顯示英文?
「ActionScript 3.0 參考」的內容是以英文顯示

並非所有「ActionScript 3.0 參考」的內容都翻譯為所有語言。當語言元素未翻譯時,就會以英文顯示。例如,ga.controls.HelpBox 類別並沒有翻譯為任何語言。因此在參考的繁體中文版本中,ga.controls.HelpBox 類別就會以英文顯示。