上传文件到服务器text=Error #2049的Flex问题:安全沙箱违规

Question

我正在尝试使用Flex将文件从客户端的浏览器上传到服务器。我已经使用FileReference类调用了一个执行上传的.For。下面是uploadHandler函数的代码。

private function uploadHandler(event:Event):void
            {
                var url:String="http://localhost/upload/WelcomeServlet";
                var request:URLRequest=new URLRequest(url);
                request.method=URLRequestMethod.POST;
                var variables:URLVariables=new URLVariables();
                variables.employeeID="sam";
                request.data=variables;             
                file.upload(request);
            }

正如URLRequest处理http请求一样，我在tomcat服务器的根文件夹中添加了网络策略文件crossdomain.xml .below是xml

<?xml version="1.0"?>
<!DOCTYPE cross-domain-policy SYSTEM "http://www.macromedia.com/xml/dtds/cross-domain-policy.dtd"> 
<cross-domain-policy>
    <site-control permitted-cross-domain-policies="All"/>
    <allow-access-from domain="*"  secure="false" />
</cross-domain-policy>

在尝试上传文件时，我仍然收到以下错误：

Error #2044: Unhandled SecurityErrorEvent:. text=Error #2049: Security sandbox violation: http://mysite.com/upload/upload.swf cannot upload data to http://localhost/upload/WelcomeServlet.
    at upload/creationCompleteHandler()[C:\Users\Documents\Flex Builder 3\upload\src\upload.mxml:22]
    at upload/___upload_Application1_creationComplete()[C:\Users\Documents\Flex Builder 3\upload\src\upload.mxml:4]
    at flash.events::EventDispatcher/dispatchEventFunction()
    at flash.events::EventDispatcher/dispatchEvent()
    at mx.core::UIComponent/dispatchEvent()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:9298]
    at mx.core::UIComponent/set initialized()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:1169]
    at mx.managers::LayoutManager/doPhasedInstantiation()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:718]
    at Function/http://adobe.com/AS3/2006/builtin::apply()
    at mx.core::UIComponent/callLaterDispatcher2()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8628]
    at mx.core::UIComponent/callLaterDispatcher()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8568]

当我尝试从本地主机上传时，它工作得很好。我需要添加任何额外的编译器参数吗？我使用的是flash player 10和apache tomcat 6.0.20。这个错误已经困扰我很长一段时间了，如果有任何帮助，我将不胜感激

谢谢sanre6

Answer 1

为什么不更改此字符串：

var url:String="http://localhost/upload/WelcomeServlet";

至：

var url:String="/WelcomeServlet";