Silverlight HttpWebRequest安全异常
本文关键字:异常 安全 HttpWebRequest Silverlight | 更新日期: 2023-09-27 18:16:04
问题
我有一个在远程服务器上运行的restful web服务。我已经制作了一个使用它的WP7应用程序,所以我知道它是有效的。我正在将应用程序移植到Silverlight web应用程序,遇到了一个问题。
我包含了代码的简化版本以及抛出的错误。在EndGetResponse
方法上抛出错误。
请随意询问更多信息。我四处寻找解决方案,但没有找到任何有效或真正适用于我的问题的方法。这看起来是如此简单的代码,它在WP7版本上运行完美。如有任何帮助,不胜感激。
<标题>void SendRequest() {
string url = "http://some-example-restful-service:5600/locations/data/all";
HttpWebRequest request = (HttpWebRequest) HttpWebRequest.Create(url);
request.Method = "POST";
request.ContentType = "application/json; charset=utf-8";
request.BeginGetResponse(new AsyncCallback(RequestCallback), request);
}
public static void RequestCallback(IAsyncResult asyncResult) {
HttpWebRequest request = (HttpWebRequest) asyncResult.AsyncState;
HttpWebResponse response = (HttpWebResponse) request.EndGetResponse(asyncResult);
//Parse JSON object
response.Close();
//Dispatch result back to GUI thread
}
<标题> 的错误SecurityException未被用户代码处理
System.Security。SecurityException: Security error.
at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
at System.Net.Browser.AsyncHelper.<>c__DisplayClass4.<BeginOnUI>b__0(Object sendState)
--- End of inner exception stack trace ---
at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
at System.Net.Browser.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at ServieTest.MainPage.RequestCallback(IAsyncResult asyncResult)
at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClassd.<InvokeGetResponseCallback>b__b(Object state2)
at System.Threading.QueueUserWorkItemCallback.WaitCallback_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.QueueUserWorkItemCallback.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
at System.Threading.ThreadPoolWorkQueue.Dispatch()
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()
标题>标题>
原来我需要在服务域的根目录上添加一个clientaccesspolicy.xml
文件。
文件的内容如下:
<?xml version="1.0" encoding="utf-8"?>
<access-policy>
<cross-domain-access>
<policy>
<allow-from http-request-headers="*">
<domain uri="*"/>
</allow-from>
<grant-to>
<resource path="/" include-subpaths="true"/>
</grant-to>
</policy>
</cross-domain-access>
</access-policy>
根据这个答案,Silverlight(浏览器内)遵循从其请求数据的服务器的跨域策略。因为它是你自己的web服务,你可以添加一个crossdomain.xml
文件到你的应用程序的根允许外部域跨域请求(根据这个答案)。