Azure 服务总线中继和 http 协议

Question

我必须设置一个必须可供其他平台访问的 Azure 服务 (android、iOS)。这就是为什么我尝试使用 http 或 https 协议而不是 sb（服务总线）协议来设置它（参考：Service Bus Bindings，最后一段）。

不幸的是，服务在初始化时抛出异常：

"HTTP could not register URL http://+:80/ServiceBusDefaultNamespace/. Your process does not have access rights to this namespace (see http://go.microsoft.com/fwlink/?LinkId=70353 for details)."

WorkerRole中的服务初始化代码为：

  private void InitailizeService()
  {
     Trace.WriteLine("Initializing service");
     try
     {
        var serviceAddress = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ServiceAddress");
        var protocol = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.Protocol");
        string keyName = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ServiceKeyName");
        string sharedAccessKey = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ServiceSharedAccessKey");

        Uri uri = new Uri(protocol + "://" + serviceAddress + "/ServiceBusDefaultNamespace");

        ServiceBusEnvironment.SystemConnectivity.Mode = ConnectivityMode.Http;
        _host = new ServiceHost(typeof(WorkerRoleService), uri);

        TokenProvider tp = null;
        if (!String.IsNullOrEmpty(keyName))
        {
           tp = TokenProvider.CreateSharedAccessSignatureTokenProvider(keyName, sharedAccessKey);
        }
        var sharedSecretServiceBusCredential = new TransportClientEndpointBehavior(tp);

        ContractDescription contractDescription = ContractDescription.GetContract(typeof(IInstalSoftCloudService), typeof(WorkerRoleService));

        ServiceEndpoint serviceEndPoint = new ServiceEndpoint(contractDescription);
        serviceEndPoint.Address = new EndpointAddress(uri);

        Binding binding;
        switch (protocol)
        {
           case "sb":
              binding = new NetTcpRelayBinding { TransferMode = TransferMode.Streamed, MaxReceivedMessageSize = 1048576000, MaxBufferSize = 10485760, MaxConnections = 200 };
              break;
           case "http":
           case "https":
              binding = new WebHttpRelayBinding { TransferMode = TransferMode.Streamed, MaxReceivedMessageSize = 1048576000, MaxBufferSize = 10485760 };
              break;
           default:
              throw new NotSupportedException("Protocol not supported: " + protocol);
        }
        serviceEndPoint.Binding = binding;
        serviceEndPoint.Behaviors.Add(sharedSecretServiceBusCredential);

        _host.Description.Endpoints.Add(serviceEndPoint);

        _host.Open();

        Trace.WriteLine("Service initialization completed");
     }
     catch (Exception e)
     {
        Trace.WriteLine("Service initialization failed.\r\n" + e.Message);

        throw; 
     }
  }

ServiceConfiguration.Cloud.cscfg中的设置是：

  <Setting name="Microsoft.ServiceBus.ServiceAddress" value="<my namespace here>.servicebus.windows.net" />
  <Setting name="Microsoft.ServiceBus.ServiceKeyName" value="RootManageSharedAccessKey" />
  <Setting name="Microsoft.ServiceBus.ServiceSharedAccessKey" value="<my key here>" />
  <Setting name="Microsoft.ServiceBus.Protocol" value="http" />

当设置中的协议更改为 "sb" 时，上述代码工作正常。

Answer 1

经过几个小时的努力，我最终让它可以使用 https 协议。在服务主机创建行中进行了关键更改：

_host = new ServiceHost(typeof(WorkerRoleService));

而不是：

_host = new ServiceHost(typeof(WorkerRoleService), uri);

我还将安全令牌从 SAS 更改为 ACS。它需要使用 Azure CLI 重新创建我的服务总线，因为 Azure 门户不允许为以前创建的服务总线启用 ACS。有关更多详细信息，请参阅此 post：How can I create a windows service ACS by powershell?（阅读所有评论，因为订阅选择的正确命令是 Select-AzureSubscription）。

我的最终代码是：

  private void InitailizeService()
  {
     try
     {
        var serviceAddress = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ServiceAddress");
        var serviceNamespace = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ServiceNamespace");
        var protocol = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.Protocol");
        string issuerName = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ServiceIssuerName");
        string issuerSecret = CloudConfigurationManager.GetSetting("Microsoft.ServiceBus.ServiceIssuerSecret");

        Uri uri = ServiceBusEnvironment.CreateServiceUri(protocol, serviceAddress, serviceNamespace);

        ServiceBusEnvironment.SystemConnectivity.Mode = ConnectivityMode.Http;
        _host = new ServiceHost(typeof(WorkerRoleService));

        TokenProvider tp = null;
        if (!String.IsNullOrEmpty(issuerName))
        {
           tp = TokenProvider.CreateSharedSecretTokenProvider(issuerName, issuerSecret);
        }
        var sharedSecretServiceBusCredential = new TransportClientEndpointBehavior(tp);

        Binding binding;
        switch (protocol)
        {
           case "sb":
              binding = new NetTcpRelayBinding { TransferMode = TransferMode.Streamed, MaxReceivedMessageSize = 1048576000, MaxBufferSize = 10485760, MaxConnections = 200 };
              break;
           case "http":
              binding = new BasicHttpBinding { TransferMode = TransferMode.Streamed, MaxReceivedMessageSize = 1048576000, MaxBufferSize = 10485760 };
              break;
           case "https":
              var wsbinding = new WS2007HttpRelayBinding { MaxReceivedMessageSize = 1048576000 };
              wsbinding.Security.Mode = EndToEndSecurityMode.Transport;
              wsbinding.Security.RelayClientAuthenticationType = RelayClientAuthenticationType.None;
              binding = wsbinding;
              break;
           default:
              throw new NotSupportedException("Protocol not supported: " + protocol);
        }
        var serviceEndPoint = _host.AddServiceEndpoint(typeof(IInstalSoftCloudService), binding, uri);
        serviceEndPoint.Behaviors.Add(sharedSecretServiceBusCredential);

        // Lines below are for MEX and publishing of the service
        EnableMetadataExchange(uri, sharedSecretServiceBusCredential, binding);
        ServiceRegistrySettings serviceRegistrySettings = new ServiceRegistrySettings(DiscoveryType.Public) { DisplayName = "InstalSystemMobileEngine" };
        foreach (ServiceEndpoint subscriberEndpoint in _host.Description.Endpoints)
        {
           subscriberEndpoint.Behaviors.Add(serviceRegistrySettings);
        }

        _host.Open();

        Trace.WriteLine("Service initialization completed");
     }
     catch (Exception e)
     {
        Trace.WriteLine("Service initialization failed.\r\n" + e.Message);

        throw; 
     }
  }

  private void EnableMetadataExchange(Uri aBaseUri, TransportClientEndpointBehavior aBehavior, Binding aBinding, bool aEnableHttpGet = true)
  {
     if (_host.State == CommunicationState.Opened)
        throw new InvalidOperationException("Host already opened");
     var metadataBehavior = _host.Description.Behaviors.Find<ServiceMetadataBehavior>();
     if (metadataBehavior == null)
     {
        metadataBehavior = new ServiceMetadataBehavior();
        _host.Description.Behaviors.Add(metadataBehavior);
        Trace.WriteLine("_host.Description.Behaviors.Add(metadataBehavior)");
     }
     var mexEndpoint = _host.AddServiceEndpoint(typeof(IMetadataExchange), aBinding, new Uri(aBaseUri, "mex"));
     mexEndpoint.Behaviors.Add(aBehavior);
  }

以上代码的配置：

  <Setting name="Microsoft.ServiceBus.ServiceAddress" value="<service bus address - without .servicebus.windows.net>" />
  <Setting name="Microsoft.ServiceBus.ServiceNamespace" value="ServiceBusDefaultNamespace/" />
  <Setting name="Microsoft.ServiceBus.ServiceIssuerName" value="<issuer name>" />
  <Setting name="Microsoft.ServiceBus.ServiceIssuerSecret" value="<issuer secret>" />
  <Setting name="Microsoft.ServiceBus.Protocol" value="https" />

现在我们必须尝试从 Android 应用程序连接到此服务 - 希望一切顺利。来自测试 WCF 应用程序的连接工作正常，非常重要的一点是：允许 Azure 缩放（附加到服务总线的多个辅助角色实例）。

以上代码不适用于 http 协议。我把它留在这里是因为它适用于 Azure 模拟器（将服务总线切换到本地服务总线 Windows）。

希望以上内容对某人有所帮助...

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