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使用HttpWebRequest連接Azure Service Bus中繼(WCF終結點)

[英]Connecting Azure Service Bus Relay (WCF endpoint) using HttpWebRequest

請幫助。 我試圖使用HttpWebRequest訪問暴露給服務總線中繼端點的WCF服務。

我通過OAuth WRAP協議從ACS成功獲得了令牌。 使用該令牌作為請求標頭中的授權,我創建了一個WebRequest以與WCF服務進行通信,該端點具有配置為WebHttpRelayBinding的終結點,以及一個用於OperationContractAttribute和WebGetAttribute的WCF服務方法。

當我運行客戶端應用程序時,出現以下錯誤:

收件人為https://namespace.servicebus.windows.net/Student/GetInfo/GetStudentInfo/1的To消息無法在接收方處理,因為EndpointDispatcher上的AddressFilter不匹配。 檢查發送方和接收方的EndpointAddresses是否一致。

我在Google上搜索,發現了將以下屬性應用於服務類的建議:

[ServiceBehavior(AddressFilterMode = AddressFilterMode.Any)]

雖然這解決了先前的錯誤,但是現在客戶端應用程序最終出現以下錯誤:

由於EndpointDispatcher的ContractFilter不匹配,帶有Action'GET'的消息無法在接收方處理。 這可能是由於合同不匹配(發送方和接收方之間的操作不匹配)或發送方和接收方之間的綁定/安全不匹配造成的。 檢查發送方和接收方是否具有相同的合同和相同的綁定(包括安全要求,例如,消息,傳輸,無)。

我想我在WCF服務端缺少一些東西。 共享客戶代碼和服務代碼以供您查看。

WCF服務代碼:

[ServiceContract]
interface IStudentInfo
{
    [OperationContract]
    [WebGet(ResponseFormat = WebMessageFormat.Xml, UriTemplate = "/GetStudentInfo/{studentId}")]
    string GetStudentInfo(string studentId);
}

        [ServiceBehavior(AddressFilterMode = AddressFilterMode.Any)]
        private class StudentInfo : IStudentInfo
        {
            string IStudentInfo.GetStudentInfo(string studentId)
            {
                string returnString = null;

                // .....

                return returnString;
            }
        }

        public void Run()
        {
            Console.WriteLine("LISTENER");
            Console.WriteLine("========");

            string serviceNamespace = "namespace";
            string issuerName = "owner";
            string issuerKey = "key";
            string servicePath = "Student/GetInfo";

            ServiceHost sh = new ServiceHost(typeof(StudentInfo));

            // Binding
            WebHttpRelayBinding binding2 = new WebHttpRelayBinding();

            Uri uri = ServiceBusEnvironment.CreateServiceUri(Uri.UriSchemeHttps, serviceNamespace, servicePath);
            Console.WriteLine("Service Uri: " + uri);
            Console.WriteLine();

            sh.AddServiceEndpoint(typeof(IStudentInfo), binding2, uri);

            // Create the ServiceRegistrySettings behavior for the endpoint.
            var serviceRegistrySettings = new ServiceRegistrySettings(DiscoveryType.Public);

            // Create the shared secret credentials object for the endpoint matching the 
            // Azure access control services issuer 
            var sharedSecretServiceBusCredential = new TransportClientEndpointBehavior()
            {
                TokenProvider = TokenProvider.CreateSharedSecretTokenProvider(issuerName, issuerKey)
            };

            // Add the service bus credentials to all endpoints specified in configuration.
            foreach (var endpoint in sh.Description.Endpoints)
            {
                endpoint.Behaviors.Add(serviceRegistrySettings);
                endpoint.Behaviors.Add(sharedSecretServiceBusCredential);
            }

            sh.Open();

            Console.WriteLine("Press ENTER to close");
            Console.ReadLine();

            sh.Close();
        }

服務消費代碼:

    static void Main(string[] args)
    {
        var studentId = "1";

        string _token = GetToken();
        Console.WriteLine(_token);

        // Create and configure the Request
        var httpWebRequest = (HttpWebRequest)WebRequest.Create("https://namespace.servicebus.windows.net/Student/GetInfo/GetStudentInfo/" + studentId);
        httpWebRequest.ContentType = "text/json";
        httpWebRequest.Method = "GET";
        httpWebRequest.Headers.Add(HttpRequestHeader.Authorization, string.Format("WRAP access_token=\"{0}\"", _token));

        // Get the response using the Request
        HttpWebResponse response = httpWebRequest.GetResponse() as HttpWebResponse;

        // Read the stream from the response object
        Stream stream = response.GetResponseStream();
        StreamReader reader = new StreamReader(stream);

        // Read the result from the stream reader
        string result = reader.ReadToEnd();

        Console.WriteLine("Result: " + result);

        Console.ReadLine();
    }

    static string GetToken()
    {
        string base_address = string.Format("https://namespace-sb.accesscontrol.windows.net");
        string wrap_name = "owner";
        string wrap_password = "key";
        string wrap_scope = "http://namespace.servicebus.windows.net/";

        WebClient client = new WebClient();
        client.BaseAddress = base_address;

        NameValueCollection values = new NameValueCollection();
        values.Add("wrap_name", wrap_name);
        values.Add("wrap_password", wrap_password);
        values.Add("wrap_scope", wrap_scope);

        byte[] responseBytes = client.UploadValues("WRAPv0.9", "POST", values);
        string response = Encoding.UTF8.GetString(responseBytes);

        string token = response.Split('&')
         .Single(value => value.StartsWith("wrap_access_token="))
         .Split('=')[1];

        string _token = HttpUtility.UrlDecode(token);

        return _token;
    }

終於完成了!

我缺少將WebHttpBehavior服務公開為REST端點所必需的端點的WebHttpBehavior

endpoint.Behaviors.Add(new WebHttpBehavior());

或者,我可以在WebServiceHost托管服務,而不是在“ ServiceHost”中托管服務,以啟用REST綁定。

WebServiceHost sh = new WebServiceHost(typeof(StudentInfo));

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