如何通过代理连接到 WCF 服务

Question

我正在尝试通过代理连接到 WCF 服务。代理通过登录密码进行身份验证。

我的代码是：

var proxyHost = "http://127.0.0.1:3128/";
var proxyUserName = "username";
var proxyUserPassword = "userpassword";

var apiConnectAddress = "https://remoteaddress/service.svc";

var binding = new BasicHttpBinding
{
    UseDefaultWebProxy = false,
    ProxyAddress = new Uri(proxyHost)
    Security =
    {
        Mode = BasicHttpSecurityMode.Transport,
        Transport = 
        {
            ClientCredentialType = HttpClientCredentialType.None,
            ProxyCredentialType = HttpProxyCredentialType.Basic
        }
    }
};

var client = new Client(binding, new EndpointAddress(apiConnectAddress));

client.ClientCredentials.UserName.UserName = proxyUserName;
client.ClientCredentials.UserName.Password = proxyUserPassword;

client.SomeMethod(...); // an exception occurs here

class Client : System.ServiceModel.ClientBase<T> { ... }

异常详情：

System.ServiceModel.ProtocolException
    HResult=0x80131500
    Message=The remote server returned an unexpected response: (407) Proxy 
    Authentication Required.
    Source=System.Private.ServiceModel
    StackTrace:
        at System.Runtime.AsyncResult.End[TAsyncResult](IAsyncResult result)
        at System.ServiceModel.Channels.ServiceChannel.SendAsyncResult.End(SendAsyncResult result)
        at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
        at System.ServiceModel.Channels.ServiceChannelProxy.TaskCreator.<>c__DisplayClass1_0.<CreateGenericTask>b__0(IAsyncResult asyncResult)
        at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()
        at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
        at System.Runtime.CompilerServices.ConfiguredTaskAwaitable`1.ConfiguredTaskAwaiter.GetResult()

据我了解，发生异常是因为登录名和密码未传输到代理服务器。如何配置HttpBinding通过代理成功连接服务？

PS。在 .Net Core 2.2 上编写的应用

Answer 1

根据提问者的提示，以及Github issue中提到的，
github.com/dotnet/wcf/issues/1592
目前无法使用带身份验证的代理。
谢谢。