WebException意外的EOF打开HTTPS网址 [英] WebException unexpected EOF opening HTTPS url
问题描述
您好，
我正在尝试使用.NET WebClient类打开特定的https网址。但是，我一直收到下面发布的错误。在网上进行一些搜索之后，看起来可能的解决方案可能是设置'ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;'
但是这只会导致500内部服务器错误响应。
I am trying to open a specific https url using the .NET WebClient class. However, I keep getting the error as posted below. After some search on the web, it looked like a possible solution could be setting 'ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;' However this only led to a 500 internal server error response.
有谁知道如何解决这个问题（或者其他人遇到同样的问题）？我正在尝试执行以下代码：
Does anyone know how to fix this (or is anyone else experiencing the same problem)? I am trying to execute the following code:
client = new WebClient（）;
client = new WebClient();
s = client.OpenRead（" https://osiris.utwente.nl/student/OnderwijsCatalogus.do"）;
s = client.OpenRead("https://osiris.utwente.nl/student/OnderwijsCatalogus.do");
rdr = new StreamReader（s）;
rdr = new StreamReader(s);
string c = rdr.ReadToEnd（）;
string c = rdr.ReadToEnd();
谢谢寻求帮助！
-Floris
System.Net.WebException：底层连接已关闭：发送时发生意外错误。 ---> System.IO.IOException：从传输流中收到意外的EOF或0字节。
System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Received an unexpected EOF or 0 bytes from the transport stream.
at System.Net.FixedSizeReader.ReadPacket（Byte [] buffer，Int32 offset，Int32 count）
at System.Net.FixedSizeReader.ReadPacket(Byte[] buffer, Int32 offset, Int32 count)
at System.Net.Security.SslState.StartReadFrame（Byte [] buffer，Int32 readBytes，AsyncProtocolRequest asyncRequest）
at System.Net.Security.SslState.StartReadFrame(Byte[] buffer, Int32 readBytes, AsyncProtocolRequest asyncRequest)
在System.Net.Security.SslState.StartReceiveBlob（Byte []缓冲区，AsyncProtocolRequest asyncRequest）
at System.Net.Security.SslState.StartReceiveBlob(Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.CheckCompletionBeforeNextReceive（ProtocolToken message，AsyncProtocolRequest asyncRequest）
at System.Net.Security.SslState.CheckCompletionBeforeNextReceive(ProtocolToken message, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.StartSendBlob（Byte [] incoming，Int32 count，AsyncProtocolRequest asyncRequest）
at System.Net.Security.SslState.StartSendBlob(Byte[] incoming, Int32 count, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ForceAuthentication（Boolean receiveFirst，Byte [] buffer，AsyncProtocolRequest asyncRequest）
at System.Net.Security.SslState.ForceAuthentication(Boolean receiveFirst, Byte[] buffer, AsyncProtocolRequest asyncRequest)
at System.Net.Security.SslState.ProcessAuthentication（LazyAsyncResult lazyResult）
at System.Net.Security.SslState.ProcessAuthentication(LazyAsyncResult lazyResult)
at System.Net.TlsStream.CallProcessAuthentication（Object state）
at System.Net.TlsStream.CallProcessAuthentication(Object state)
at System.Threading.ExecutionContext.runTryCode（Object userData）
at System.Threading.ExecutionContext.runTryCode(Object userData)
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup（TryCode code，CleanupCode backoutCode，Object userData）
at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)
at System.Threading.ExecutionContext.RunInternal（ExecutionContext executionContext，ContextCallback callback，Object state）
at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Threading.ExecutionContext.Run（ExecutionContext executionContext，ContextCallback callback，Object state，Boolean ignoreSyncCtx）
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
at System.Threading.ExecutionContext.Run（ExecutionContext executionContext，ContextCallback callback，Object state）
at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
at System.Net.TlsStream.ProcessAuthentication（LazyAsyncResult result）
at System.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result)
at System.Net.TlsStream.Write（Byte [] buffer，Int32 offset，Int32 size）
at System.Net.TlsStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.PooledStream.Write（Byte [] buffer，Int32 offset，Int32 size）
at System.Net.PooledStream.Write(Byte[] buffer, Int32 offset, Int32 size)
at System.Net.ConnectStream.WriteHeaders（Boolean async）
at System.Net.ConnectStream.WriteHeaders(Boolean async)
---内部异常堆栈跟踪结束---
--- End of inner exception stack trace ---
在System.Net.WebClient.OpenRead（Uri地址）
at System.Net.WebClient.OpenRead(Uri address)
at System.Net.WebClient.OpenRead（String address）
at System.Net.WebClient.OpenRead(String address)
at WebTest.Form1..ctor（）
at WebTest.Form1..ctor()
推荐答案
我转载了你的问题。
I reproduced your problem.
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