以编程方式创建 WCF REST 客户端代理（在 C# 中）

Posted 2023-03-15

【中文标题】以编程方式创建 WCF REST 客户端代理（在 C# 中）

【英文标题】：Create a WCF REST Client Proxy Programatically (in C#)

【发布时间】：2011-02-15 12:07:41

【问题描述】：

我正在尝试使用以下代码在 C# 中以编程方式创建 REST 客户端代理，但我不断收到 CommunicationException 错误。我错过了什么吗？

public static class WebProxyFactory

    public static T Create<T>(string url) where T : class
    
        ServicePointManager.Expect100Continue = false;
        WebHttpBinding binding = new WebHttpBinding();

        binding.MaxReceivedMessageSize = 1000000;

        WebChannelFactory<T> factory =
          new WebChannelFactory<T>(binding, new Uri(url));

        T proxy = factory.CreateChannel();

        return proxy;
    

    public static T Create<T>(string url, string userName, string password)
      where T : class
    
        ServicePointManager.Expect100Continue = false;
        WebHttpBinding binding = new WebHttpBinding();

        binding.Security.Mode =
          WebHttpSecurityMode.TransportCredentialOnly;
        binding.Security.Transport.ClientCredentialType =
          HttpClientCredentialType.Basic;
        binding.UseDefaultWebProxy = false;

        binding.MaxReceivedMessageSize = 1000000;

        WebChannelFactory<T> factory =
          new WebChannelFactory<T>(binding, new Uri(url));

        ClientCredentials credentials = factory.Credentials;
        credentials.UserName.UserName = userName;
        credentials.UserName.Password = password;

        T proxy = factory.CreateChannel();

        return proxy;
    

这样我就可以按如下方式使用它：

IMyRestService proxy = WebProxyFactory.Create<IMyRestService>(url, usr, pwd);
var result = proxy.GetSomthing(); // Fails right here

【问题讨论】：

我还不明白为什么，但在另一个问题中，问题是将 webhttpbinding 添加到工厂端点行为： factory.Endpoint.Behaviors.Add(new WebHttpBehavior());

那也没用。还有其他建议吗？

【参考方案1】：

为了让它与表单身份验证一起使用，我必须按如下方式物理覆盖身份验证标头：

var proxy = WebProxyFactory.Create<ITitleWorldService>(url, userName, password);

using (new OperationContextScope((IContextChannel)proxy))

    var authorizationToken = GetBasicAuthorizationToken(userName, password);
    var httpRequestProperty = new HttpRequestMessageProperty();
    httpRequestProperty.Headers[System.Net.HttpRequestHeader.Authorization] = authorizationToken;
    OperationContext.Current.OutgoingMessageProperties[HttpRequestMessageProperty.Name] = httpRequestProperty;

    //var response = proxy.DoWork();    
    Console.WriteLine(proxy.SayHello());