没有端点监听

Posted 2023-04-13

【中文标题】没有端点监听

【英文标题】：There was no endpoint listening

【发布时间】：2014-12-05 13:21:57

【问题描述】：

我正在尝试托管自己的 wcf 并远离 app.config 文件。我的 wcf 服务是我的 wpf 项目的一部分。主机代码是。

host = new ServiceHost(typeof(Service1), new Uri("http://" + System.Net.Dns.GetHostName() + ":8733/DatabaseTransferWcfServiceLibaryMethod/Service1/"));
ServiceMetadataBehavior smb = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (smb == null)

    smb = new ServiceMetadataBehavior();


BasicHttpBinding q = new BasicHttpBinding(BasicHttpSecurityMode.None);
q.CloseTimeout = new TimeSpan(1, 1, 0);
q.OpenTimeout = new TimeSpan(1, 1, 0);
q.ReceiveTimeout = new TimeSpan(1, 1, 0);
q.SendTimeout = new TimeSpan(1, 1, 0);
q.AllowCookies = false;
q.BypassProxyOnLocal = false;
q.MaxBufferSize = 2147483646;
q.MaxBufferPoolSize = 2147483646;
q.MaxReceivedMessageSize = 2147483646;
q.ReaderQuotas.MaxArrayLength = 2147483646;
q.ReaderQuotas.MaxBytesPerRead = 2147483646;
q.ReaderQuotas.MaxDepth = 2147483646;
q.ReaderQuotas.MaxNameTableCharCount = 2147483646;
q.ReaderQuotas.MaxStringContentLength = 2147483646;
host.AddServiceEndpoint(typeof(IService1), q, "");
smb.HttpGetEnabled = true;
smb.MetadataExporter.PolicyVersion = PolicyVersion.Default;
host.Description.Behaviors.Add(smb);

host.AddServiceEndpoint(typeof(IService1), q, "http://" + System.Net.Dns.GetHostName() + ":8733/DatabaseTransferWcfServiceLibaryMethod/Service1/");
host.AddServiceEndpoint(new UdpDiscoveryEndpoint());


host.Open();

我得到错误的客户端代码是。

var ep = "http://" + System.Net.Dns.GetHostName() + ":8733/DatabaseTransferWcfServiceLibaryMethod/Service1/";
var binding = new BasicHttpBinding();
binding.Security.Mode = BasicHttpSecurityMode.None;
binding.SendTimeout = new System.TimeSpan(0, 1, 30);

ChannelFactory<IService1> wcfFactory = new ChannelFactory<IService1>(binding, new EndpointAddress(ep));

IService1 wcf = wcfFactory.CreateChannel();
System.Net.ServicePointManager.DefaultConnectionLimit = 200;
wcf.generateId(System.Environment.MachineName);

我已经关闭了我的防火墙，所以这不是导致错误的原因。

关于我哪里出错的任何想法。

【问题讨论】：

您是否在同一台机器上运行客户端和服务器？如果不是，您需要将System.Net.Dns.GetHostName() 更改为服务器地址（在您的客户端代码中）。

是的，是同一台机器

首先我发现你的代码执行后有一些错误： 1. System.InvalidOperationException：需要一个ServiceDiscoveryBehavior来支持DiscoveryEndpoint。 2. System.InvalidOperationException：此服务有多个端点在“localhost:8733/DatabaseTransferWcfServiceLibaryMethod/Service1”监听，它们共享相同的启动操作“tempuri.org/IService1/GenerateId”

在您的 app.config 中，您已将定义的端点留在其中，这就是您收到此类错误的原因。

我不知道为什么，但自从我的电脑再次启动它就可以工作了。

【参考方案1】：

看看cmets。当我进行这两项更改时，一切正常

static void Main(string[] args)

    var host = new ServiceHost(typeof(Service1), new Uri("http://" + System.Net.Dns.GetHostName() + ":8733/DatabaseTransferWcfServiceLibaryMethod/Service1/"));
    ServiceMetadataBehavior smb = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
    if (smb == null)
    
        smb = new ServiceMetadataBehavior();
    

    BasicHttpBinding q = new BasicHttpBinding(BasicHttpSecurityMode.None);
    q.CloseTimeout = new TimeSpan(1, 1, 0);
    q.OpenTimeout = new TimeSpan(1, 1, 0);
    q.ReceiveTimeout = new TimeSpan(1, 1, 0);
    q.SendTimeout = new TimeSpan(1, 1, 0);
    q.AllowCookies = false;
    q.BypassProxyOnLocal = false;
    q.MaxBufferSize = 2147483646;
    q.MaxBufferPoolSize = 2147483646;
    q.MaxReceivedMessageSize = 2147483646;
    q.ReaderQuotas.MaxArrayLength = 2147483646;
    q.ReaderQuotas.MaxBytesPerRead = 2147483646;
    q.ReaderQuotas.MaxDepth = 2147483646;
    q.ReaderQuotas.MaxNameTableCharCount = 2147483646;
    q.ReaderQuotas.MaxStringContentLength = 2147483646;
    host.AddServiceEndpoint(typeof(IService1), q, "");
    smb.HttpGetEnabled = true;
    smb.MetadataExporter.PolicyVersion = PolicyVersion.Default;

    host.Description.Behaviors.Add(smb);
    // ADD ServiceDiscoveryBehavior
    host.Description.Behaviors.Add(new ServiceDiscoveryBehavior());

    // COMMENT THIS LINE
    host.AddServiceEndpoint(typeof(IService1), q, "http://" + System.Net.Dns.GetHostName() + ":8733/DatabaseTransferWcfServiceLibaryMethod/Service1/");
    host.AddServiceEndpoint(new UdpDiscoveryEndpoint());


    host.Open();

    var ep = "http://" + System.Net.Dns.GetHostName() + ":8733/DatabaseTransferWcfServiceLibaryMethod/Service1/";
    var binding = new BasicHttpBinding();
    binding.Security.Mode = BasicHttpSecurityMode.None;
    binding.SendTimeout = new System.TimeSpan(0, 1, 30);

    ChannelFactory<IService1> wcfFactory = new ChannelFactory<IService1>(binding, new EndpointAddress(ep));

    IService1 wcf = wcfFactory.CreateChannel();
    System.Net.ServicePointManager.DefaultConnectionLimit = 200;
    Console.WriteLine(wcf.GenerateId(System.Environment.MachineName));