azure - azure WCF中继中超过64K时出现异常

Question

我有这个代码，我是从这个 azure wcf relay 实现的

当发送大于 64K 的消息时，我收到此异常(对于较小的消息，它可以正常工作):

System.ServiceModel.CommunicationException:“已超出远程 channel 的传入消息的最大消息大小配额。有关更多详细信息，请参阅服务器日志。

根据此 quota web page NetTcpRelayBinding 中的配额是无限的

这是我的代码

class WCFRelay
{
    [ServiceContract(Namespace = "urn:ps")]
    interface IProblemSolver
    {
        [OperationContract]
        int Test(byte[] bytes);
    }

    class ProblemSolver : IProblemSolver
    {
        public int Test(byte[] bytes)
        {
            return bytes.Length;
        }
    }

    interface IProblemSolverChannel : IProblemSolver, IClientChannel { }

    public static void CreateClient()
    {
        var cf = new ChannelFactory<IProblemSolverChannel>(
        new NetTcpRelayBinding(),
        new EndpointAddress(ServiceBusEnvironment.CreateServiceUri("sb", "...", "solver")));

        cf.Endpoint.Behaviors.Add(new TransportClientEndpointBehavior
        { TokenProvider = TokenProvider.CreateSharedAccessSignatureTokenProvider("RootManageSharedAccessKey", "...") });

        using (var ch = cf.CreateChannel())
        {
            // if its 50K its ok - if its 70K i get exception
            Console.WriteLine(ch.Test(new byte[1000 * 70]));
        }
    }

    public static void CreateServer()
    {
        ServiceHost sh = new ServiceHost(typeof(ProblemSolver));

        sh.AddServiceEndpoint(
           typeof(IProblemSolver), new NetTcpRelayBinding(),
           ServiceBusEnvironment.CreateServiceUri("sb", "...", "solver"))
            .Behaviors.Add(new TransportClientEndpointBehavior
            {
                TokenProvider = TokenProvider.CreateSharedAccessSignatureTokenProvider("RootManageSharedAccessKey", "...")
            });

        sh.Open();

        while (true)
        {
            Thread.Sleep(1000);
        }
        Console.WriteLine("Press ENTER to close");
        Console.ReadLine();

        sh.Close();
    }
}

Answer 1

根据您的描述，我检查了这个问题并找到了原因。构造 NetTcpRelayBinding 时，MaxBufferSize 和 MaxReceivedMessageSize 的默认值为 64K，如下所示:

在构造 NetTcpRelayBinding 实例时，您可以将 MaxBufferSize、MaxReceivedMessageSize、MaxBufferPoolSize 指定为更大的值在您的服务器和客户端。

结果: