Silverlight로 헤더를 설정하려면 HTTPWebRequest를 얻으려면 어떻게해야합니까?
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05-07-2019 - |
문제
httpwebrequest를 사용하여 Silverlight에서 편안한 서비스를 요청하는 것은 요청에 헤더를 추가하지 않는 한 잘 작동합니다.
이와 같은 코드를 사용하여 헤더를 추가하자마자
var webReq = (HttpWebRequest)WebRequest.Create(new Uri(_RemoteAddress, "GetProviderMetadata"));
webReq.Method = HttpMethodType.Get;
webReq.Headers["SomeToken"] = "someTokenValue";
이 질문의 맨 아래에 예외가 붙어 있습니다. EndGetResponse()
호출됩니다. 이것이 왜 그런지 아는 사람이 있습니까? 요청을 가져 오기 위해 헤더를 추가하는 것은 일반 .NET에서 잘 작동하는 것처럼 보이므로 Silverlight 한계의 일종이라고 생각하지만 명확히하는 문서를 찾을 수는 없습니다.
{System.NotSupportedException ---> System.NotSupportedException: Specified method is not supported.
at System.Net.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
at System.Net.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
at System.Net.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)
--- End of inner exception stack trace ---
at System.Net.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
at System.Net.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.BrowserHttpWebRequest.<>c__DisplayClassd.<InvokeGetResponseCallback>b__b(Object state2)
at System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)}
[System.NotSupportedException]: {System.NotSupportedException ---> System.NotSupportedException: Specified method is not supported.
at System.Net.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
at System.Net.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
at System.Net.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)
--- End of inner exception stack trace ---
at System.Net.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)
at System.Net.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.BrowserHttpWebRequest.<>c__DisplayClassd.<InvokeGetResponseCallback>b__b(Object state2)
at System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state)
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)
at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)}
_className: "System.NotSupportedException"
_data: {System.Collections.ListDictionaryInternal}
_dynamicMethods: null
_exceptionMethod: null
_exceptionMethodString: null
_helpURL: null
_HResult: -2146233067
_innerException: {System.NotSupportedException: Specified method is not supported.
at System.Net.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
at System.Net.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
at System.Net.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)}
_message: ""
_remoteStackIndex: 0
_remoteStackTraceString: null
_source: "System.Windows"
_stackTrace: {sbyte[192]}
_stackTraceString: null
_xcode: -532462766
_xptrs: 0
Data: {System.Collections.ListDictionaryInternal}
HelpLink: null
HResult: -2146233067
InnerException: {System.NotSupportedException: Specified method is not supported.
at System.Net.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
at System.Net.BrowserHttpWebRequest.<>c__DisplayClass5.<EndGetResponse>b__4(Object sendState)
at System.Net.AsyncHelper.<>c__DisplayClass2.<BeginOnUI>b__0(Object sendState)}
Message: ""
Source: "System.Windows"
StackTrace: " at System.Net.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)\r\n at System.Net.BrowserHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)\r\n at Intellidimension.RdfEntity.Service.RemoteEntityServiceProviderClient.getProviderMetadataResponse(IAsyncResult result)\r\n at System.Net.BrowserHttpWebRequest.<>c__DisplayClassd.<InvokeGetResponseCallback>b__b(Object state2)\r\n at System.Threading._ThreadPoolWaitCallback.WaitCallback_Context(Object state)\r\n at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)\r\n at System.Threading._ThreadPoolWaitCallback.PerformWaitCallbackInternal(_ThreadPoolWaitCallback tpWaitCallBack)\r\n at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback(Object state)"
System.Runtime.InteropServices._Exception.HelpLink: null
System.Runtime.InteropServices._Exception.Source: "System.Windows"
해결책
Silverlight는 Get 메소드가 아닌 Post 메소드를 사용하여 설정 헤더 만 지원합니다. 이는 Silverlight에서 TCP/IP 스택이 구현되는 방식의 제한 때문입니다. 호스트 OS의 API에 직접 이동하는 대신 브라우저 확장 API를 사용합니다.
다른 팁
지정하십시오 "클라이언트 HTTP"취급 전화하기 전에 WebRequest를 시작합니다.
이와 같이:
bool httpResult = WebRequest.RegisterPrefix("http://", WebRequestCreator.ClientHttp);
bool httpsResult = WebRequest.RegisterPrefix("https://", WebRequestCreator.ClientHttp);
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