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多奇怪。几个月前，我编写了一个 WCF 服务，我在本地机器上使用自签名证书通过安全的 Net.Tcp 连接对其进行了测试；一切正常。然后我使用真正的 SSL 证书部署到云服务器，一切仍然正常。

但是现在，我需要再次在本地机器上调试一些代码，并且发生了一些变化，以至于我的本地 WCF 连接不再工作了！（不，证书没有过期！）大约 2 分钟后，我得到一个EndpointNotFoundException：

Could not connect to net.tcp://mypc:8000/. The connection attempt lasted for a 
time span of 00:02:06.5152363. TCP error code 10060: A connection attempt failed 
because the connected party did not properly respond after a period of time, or 
established connection failed because connected host has failed to respond 
192.168.241.1:8000

这是创建客户端连接的代码：

protected override IWebService CreateChannel() {
  var baseAddress = CommunicationManager.DebugMode ? SharedConstants.WEB_SERVER_TEST_URL : SharedConstants.WEB_SERVER_LIVE_URL;
  var factory = new DuplexChannelFactory<IWebService>(new InstanceContext(SiteServer.Instance));
  factory.Endpoint.Address = new EndpointAddress("net.tcp://{0}:{1}/".Fmt(baseAddress, SharedConstants.PORT_WEB_SERVICE));
  var binding = new NetTcpBinding(SecurityMode.Message);
  binding.Security.Message.ClientCredentialType = MessageCredentialType.UserName;
  binding.SendTimeout = TimeSpan.FromMinutes(10);
  factory.Endpoint.Binding = binding;
  // to get past a strange error, do this:
  // (see http://geekswithblogs.net/RandyMichak/archive/2009/03/04/programattically-setting-the-maxitemsinobjectgraph-property-in-client.aspx)
  foreach (var op in factory.Endpoint.Contract.Operations) {
    var dataContractBehavior = op.Behaviors.Find<DataContractSerializerOperationBehavior>();
    dataContractBehavior.NullOr(b => b.MaxItemsInObjectGraph = 2147483647);
  }

  var cred = SiteServer.GetCredentials();
  if (cred != null) {
    var u = factory.Credentials.UserName;
    u.UserName = cred.CustomerID.ToString();
    u.Password = cred.Password;
  }
  return factory.CreateChannel();
}

这是服务器端的配置：

<service name="MyProgram.WebService.WebService" behaviorConfiguration="mex">
  <endpoint address="net.tcp://localhost:8000" binding="netTcpBinding" contract="MyProgram.IWebService" bindingConfiguration="SecureBinding" name="MyEndPoint"></endpoint>
  <endpoint address="mex" binding="mexTcpBinding" name="MEX" contract="IMetadataExchange"/>
  <host>
    <baseAddresses>
      <add baseAddress="net.tcp://localhost:8000"/>
    </baseAddresses>
  </host>
</service>
...
<netTcpBinding>
  <binding name="SecureBinding" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647" portSharingEnabled="false" 
             maxBufferSize="2147483647" >
    <readerQuotas maxDepth="32" maxStringContentLength="2147483647" maxArrayLength="16384" maxBytesPerRead="4096" maxNameTableCharCount="16384"/>
    <security mode="Message">
      <message clientCredentialType="UserName"/>
    </security>
  </binding>
</netTcpBinding>
4

2 回答 2

2

您是否一直在尝试以调试模式接受所有证书，例如：

#if DEBUG

ServicePointManager.ServerCertificateValidationCallback = 
    new RemoteCertificateValidationCallback(delegate{ return true; });

#endif
于 2011-11-18T09:42:13.370 回答
1

嗬！

I had updated my antivirus/firewall software since last debug session, and the new firewall was blocking me! Just opened the port, and everything is working fine. How embarrassing... :-o

于 2011-11-18T09:59:28.597 回答