System.Net.WebException异常：底层连接已关闭：发送时发生意外错误。在社交媒体上致电

问题描述：

我们正在使用Facebook图形API，Spring.Social.Twitter API来检索联系人所有社交媒体调用都失败，从我们的Web应用程序中，从所有API调用中我们都得到相同的异常。System.Net.WebException异常：底层连接已关闭：发送时发生意外错误。在社交媒体上致电

Twitter的API的GetResponse

Exception Type: System.Net.WebException 
Exception: The underlying connection was closed: An unexpected error occurred on a send. 
StackTrace: at System.Net.HttpWebRequest.GetResponse() 

Inner Exception --------------------------------------------------- 
Type: System.IO.IOException 
Exception: Received an unexpected EOF or 0 bytes from the transport stream. 
StackTrace: 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.StartReceiveBlob(Byte[] buffer, 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.ProcessAuthentication(LazyAsyncResult lazyResult) 
    at System.Threading.ExecutionContext.runTryCode(Object userData) 
    at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) 
    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.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) 
    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.ConnectStream.WriteHeaders(Boolean async)

Facebook的图形API调用

这是图形API调用堆栈跟踪得到响应

Exception Type: Facebook.WebExceptionWrapper 
Exception: The underlying connection was closed: An unexpected error occurred on a send. 
StackTrace: at Facebook.HttpHelper.OpenRead() 
    at Facebook.FacebookClient.Api(HttpMethod httpMethod, String path, Object parameters, Type resultType) 
    at Facebook.FacebookClient.Get(String path, Object parameters, Type resultType) 

Inner Exception --------------------------------------------------- 
Type: System.IO.IOException 
Exception: Received an unexpected EOF or 0 bytes from the transport stream. 
StackTrace: 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.StartReceiveBlob(Byte[] buffer, 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.ProcessAuthentication(LazyAsyncResult lazyResult) 
    at System.Threading.ExecutionContext.runTryCode(Object userData) 
    at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) 
    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.Net.TlsStream.ProcessAuthentication(LazyAsyncResult result) 
    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.ConnectStream.WriteHeaders(Boolean async)

这是堆栈跟踪所有的API调用。在此先感谢。

注：如果我修改我的Web配置，一切都开始工作细一些hours.after，对所有的GET请求同样的错误。

答

我已经作出REST服务删除以下行解决这要求

ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3;

一旦这个ServicePointManager.SecurityProtocol在应用程序中SSL3设置了此将应用于整个Aplication。之后，所有的Https调用将使用SSL3进行Request.and所做的请求将给我们提供以上错误

声明SSL3协议Facebook，LinkedIn，和Twitter的脆弱性后，可能已经取消了对SSL3。这里是关于SSL3贵宾https://scotthelme.co.uk/sslv3-goes-to-the-dogs-poodle-kills-off-protocol/

的详细资料

System.Net.WebException异常：底层连接已关闭：发送时发生意外错误。在社交媒体上致电

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