使用HTTPService在Flex中下載PDF文件

Question

你好
有人知道如何使用HTTPService下載pdf文件嗎？
我做

private function downloadPDF():void
{
    var httpService:HTTPService = new HTTPService();
    httpService.url = "http://coenraets.org/flexandroid90/FlexAndroid90Minutes.pdf";
    httpService.addEventListener(ResultEvent.RESULT, result);
    httpService.addEventListener(FaultEvent.FAULT, fault);
    httpService.send();
}

private function fault(event:FaultEvent):void
{
    trace("Error");
    trace("\t> Code : "+event.fault.faultCode);
    trace("\t> Description : "+event.fault.faultString);
    trace("\t> Detail : "+event.fault.faultDetail);
}

private function result(event:ResultEvent):void
{
    var pdfFile:File = new File(File.applicationStorageDirectory.nativePath + File.separator + "myPDF.pdf");
    var fileStream:FileStream = new FileStream();
    fileStream.open(pdfFile, FileMode.WRITE);
    fileStream.writeUTFBytes(event.result as String);
    fileStream.close();
}

但是我有一個錯誤

錯誤
代碼：Client.CouldNotDecode
說明：錯誤＃1090：XML解析器故障：元素格式錯誤。
詳細信息：null

使用URLLoader可以正常工作

private function initPDF():void
{
    loader = new downloadPDF();
    loader.dataFormat = URLLoaderDataFormat.BINARY;
    var request:URLRequest = new URLRequest("http://coenraets.org/flexandroid90/FlexAndroid90Minutes.pdf");
    configureListeners(loader);
    try {
        loader.load(request);
    } catch (error:Error) {
        trace("Unable to load requested URL.");
    }
}

private function configureListeners(dispatcher:EventDispatcher):void {
    dispatcher.addEventListener(Event.COMPLETE, completeHandler);
    dispatcher.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler);
}

private function completeHandler(event:Event):void {
    var pdfFile:File = new File(File.applicationStorageDirectory.nativePath + File.separator + "myPDF.pdf");
    var fileStream:FileStream = new FileStream();
    fileStream.open(pdfFile, FileMode.WRITE);
    fileStream.writeBytes(loader.data);
    fileStream.close();
}

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

Answer 1

你當然可以。

您只需要添加
httpService.resultFormat="text"

這只會為您提供字符串響應，而無需將其解析為xml。 盡管不建議使用HTTPService，因為HTTPService用於WebService，但是可以這樣做

Answer 2

問題是，您無法使用HTTPLoader下載非文本或XML（即文本）的內容。