某些方法的WCF REST基本身份验证

Question

我在WCF 4.0中实现了很多RESTful(GET和POST)方法.所有这些都通过SSL工作.

一些方法的示例:

[OperationContract]
[WebInvoke(UriTemplate = "Login?", Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
LoginResponse Login(LoginRequest request);

[OperationContract]
[WebInvoke(UriTemplate = "UpdateDetails?", Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
UpdateUserDetailResponse UpdateDetails(UpdateUserDetailRequest request);

[OperationContract]
[WebInvoke(UriTemplate = "GetDetails?", Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
UserDetailResponse GetDetails(UserDetailRequest request);

我查看了很多博客和论坛,但仍然无法找到符合我要求的内容.我需要对某些方法实现基本身份验证,但不是全部.如果你看一下上面的例子,我需要为UpdateDetails和GetDetails方法发送用户名和密码,而不是Login方法.然后,对数据库验证用户名和密码.可以这样做吗？

作为旁注:这些REST方法由许多不同的移动设备调用.

我查看了以下站点,它们都通过REST实现基本身份验证,但它们涵盖了上面提到的所有方法.

• http://msdn.microsoft.com/en-us/library/aa702565.aspx
• 将基本HTTP身份验证添加到WCF REST服务
• http://custombasicauth.codeplex.com/(底部的链接不再起作用)

有可能做我想做的事吗？

Answer 1

我创建了一个 BasicAuthenticationInvoker 类，您可以将其归因于您想要验证的方法，如下所示：

  [OperationContract]
    [BasicAuthenticationInvoker] // this is the auth attribute!
    [WebInvoke(UriTemplate = "QuickQuote?", Method = "POST", ResponseFormat = WebMessageFormat.Json, RequestFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.Bare)]
    QuickQuoteResponse QuickQuote(QuickQuoteRequest request);

实际的类如下所示：

 public class BasicAuthenticationInvoker : Attribute, IOperationBehavior, IOperationInvoker
    {
        #region Private Fields

        private IOperationInvoker _invoker;

        #endregion

        #region IOperationBehavior Members

        public void ApplyDispatchBehavior(OperationDescription operationDescription,
                                          DispatchOperation dispatchOperation)
        {
            _invoker = dispatchOperation.Invoker;
            dispatchOperation.Invoker = this;
        }

        public void ApplyClientBehavior(OperationDescription operationDescription,
                                        ClientOperation clientOperation)
        {
        }

        public void AddBindingParameters(OperationDescription operationDescription,
                                         BindingParameterCollection bindingParameters)
        {
        }

        public void Validate(OperationDescription operationDescription)
        {
        }

        #endregion

        #region IOperationInvoker Members

        public object Invoke(object instance, object[] inputs, out object[] outputs)
        {
            if (Authenticate("Client Name here"))
                return _invoker.Invoke(instance, inputs, out outputs);
            else
            {
                outputs = null;
                return null;
            }
        }

        public object[] AllocateInputs()
        {
            return _invoker.AllocateInputs();
        }

        public IAsyncResult InvokeBegin(object instance, object[] inputs,
                                        AsyncCallback callback, object state)
        {
            throw new NotSupportedException();
        }

        public object InvokeEnd(object instance, out object[] outputs, IAsyncResult result)
        {
            throw new NotSupportedException();
        }

        public bool IsSynchronous
        {
            get
            {
                return true;
            }
        }

        #endregion

        private bool Authenticate(string realm)
        {
            string[] credentials = GetCredentials(WebOperationContext.Current.IncomingRequest.Headers);

            if (credentials != null && credentials.Length == 2)
            {
                // do auth here
                var username = credentials[0];
                var password = credentials[1];

               // validate the username and password against whatever auth logic you have

                return true; // if successful
            }

            WebOperationContext.Current.OutgoingResponse.Headers["WWW-Authenticate"] = string.Format("Basic realm=\"{0}\"", realm);
            WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.Unauthorized;
            return false;
        }

        private string[] GetCredentials(WebHeaderCollection headers)
        {
            string credentials = WebOperationContext.Current.IncomingRequest.Headers["Authorization"];
            if (credentials != null)
                credentials = credentials.Trim();

            if (!string.IsNullOrEmpty(credentials))
            {
                try
                {
                    string[] credentialParts = credentials.Split(new[] {' '});
                    if (credentialParts.Length == 2 && credentialParts[0].Equals("basic", StringComparison.OrdinalIgnoreCase))
                    {
                        credentials = Encoding.ASCII.GetString(Convert.FromBase64String(credentialParts[1]));
                        credentialParts = credentials.Split(new[] {':'});
                        if (credentialParts.Length == 2)
                            return credentialParts;
                    }
                }
                catch
                {
                }
            }

            return null;
        }
    }