How to: Create a Custom Reliable Session Binding with HTTPS

Article
08/07/2009

This topic demonstrates the use of Secure Sockets Layer (SSL) transport security with reliable sessions. To use a reliable session over HTTPS, you must create a custom binding that uses a reliable session and the HTTPS transport. You can enable the reliable session either imperatively by using code or declaratively in the configuration file. This procedure uses the client and service configuration files to enable the reliable session and the <httpsTransport> element.

The key part of this procedure is that the endpoint configuration element contain a bindingConfiguration attribute that references a custom binding configuration named "reliableSessionOverHttps". The <binding> configuration element can then reference this name to specify that a reliable session and the HTTPS transport are used by including reliableSession and httpsTransport elements.

For the source copy of this example, see Custom Binding Reliable Session over HTTPS.

To configure the service with a CustomBinding to use a reliable session with HTTPS

Define a service contract for the type of service.

[ServiceContract]
public interface ICalculator
{
   [OperationContract]
   double Add(double n1, double n2);
   [OperationContract]
   double Subtract(double n1, double n2);
   [OperationContract]
   double Multiply(double n1, double n2);
   [OperationContract]
   double Divide(double n1, double n2);
}

Implement the service contract in a service class. Note that address or binding information is not specified inside the implementation of the service. Also, code does not have to be written to retrieve that information from the configuration file.

public class CalculatorService : ICalculator
{
   public double Add(double n1, double n2)
   {
      return n1 + n2;
   }
   public double Subtract(double n1, double n2)
   {
      return n1 - n2;
   }
   public double Multiply(double n1, double n2)
   {
      return n1 * n2;
   }
   public double Divide(double n1, double n2)
   {
      return n1 / n2;
   }
}

Create a Web.config file to configure an endpoint for the CalculatorService with a custom binding named "reliableSessionOverHttps" that uses a reliable session and the HTTPS transport.

Create a Service.svc file that contains the line:

<%@ServiceHost language=c# Service="CalculatorService" %>

Place the Service.svc file in your Internet Information Services (IIS) virtual directory.

To configure the client with a CustomBinding to use a reliable session with HTTPS

Use the ServiceModel Metadata Utility Tool (Svcutil.exe) from the command line to generate code from service metadata.
```
Svcutil.exe <service's Metadata Exchange (MEX) address or HTTP GET address> 
```

The client that is generated contains the ICalculator interface that defines the service contract that the client implementation must satisfy.

//Generated interface defining the ICalculator contract   
    [System.ServiceModel.ServiceContractAttribute(
    Namespace="http://Microsoft.ServiceModel.Samples",              ConfigurationName="Microsoft.ServiceModel.Samples.ICalculator")]
    public interface ICalculator
    {

        [System.ServiceModel.OperationContractAttribute(
    Action="http://Microsoft.ServiceModel.Samples/ICalculator/Add",         ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/AddResponse")]
        double Add(double n1, double n2);

            [System.ServiceModel.OperationContractAttribute(
    Action="http://Microsoft.ServiceModel.Samples/ICalculator/Subtract",    ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/SubtractResponse")]
        double Subtract(double n1, double n2);

            [System.ServiceModel.OperationContractAttribute(
    Action="http://Microsoft.ServiceModel.Samples/ICalculator/Multiply",    ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/MultiplyResponse")]
        double Multiply(double n1, double n2);

            [System.ServiceModel.OperationContractAttribute(
    Action="http://Microsoft.ServiceModel.Samples/ICalculator/Divide",  ReplyAction="http://Microsoft.ServiceModel.Samples/ICalculator/DivideResponse")]
        double Divide(double n1, double n2);
    }

The generated client application also contains the implementation of the ClientCalculator. Note that the address and binding information is not specified anywhere inside the implementation of the service. Also, code does not have to be written to retrieve that information from the configuration file.

// Implementation of the CalculatorClient
public partial class CalculatorClient :         System.ServiceModel.ClientBase<Microsoft.ServiceModel.Samples.ICalculator>,         Microsoft.ServiceModel.Samples.ICalculator
{

    public CalculatorClient()
    {
    }

    public CalculatorClient(string endpointConfigurationName) : 
            base(endpointConfigurationName)
    {
    }

    public CalculatorClient(string endpointConfigurationName, string remoteAddress) : 
            base(endpointConfigurationName, remoteAddress)
    {
    }

    public CalculatorClient(string endpointConfigurationName, 
            System.ServiceModel.EndpointAddress remoteAddress) : 
            base(endpointConfigurationName, remoteAddress)
    {
    }

    public CalculatorClient(System.ServiceModel.Channels.Binding binding,                 System.ServiceModel.EndpointAddress remoteAddress) : 
            base(binding, remoteAddress)
    {
    }

    public double Add(double n1, double n2)
    {
        return base.Channel.Add(n1, n2);
    }

    public double Subtract(double n1, double n2)
    {
        return base.Channel.Subtract(n1, n2);
    }

    public double Multiply(double n1, double n2)
    {
        return base.Channel.Multiply(n1, n2);
    }

    public double Divide(double n1, double n2)
    {
        return base.Channel.Divide(n1, n2);
    }
}

Configure a custom binding named "reliableSessionOverHttps" to use the HTTPS transport and reliable sessions.

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.serviceModel>

    <client>
      <!-- this endpoint has an https: address -->
      <endpoint name=""
                address="https://localhost/servicemodelsamples/service.svc" 
                binding="customBinding" 
                bindingConfiguration="reliableSessionOverHttps" 
                contract="Microsoft.ServiceModel.Samples.ICalculator" />
    </client>

      <bindings>
        <customBinding>
          <binding name="reliableSessionOverHttps">
            <reliableSession />
            <httpsTransport />
          </binding>
        </customBinding>      
    </bindings>

  </system.serviceModel>

</configuration>

Create an instance of the ClientCalculator in an application and then call the service operations.

//Client implementation code.
class Client
{
    static void Main()
    {
        // Create a client with given client endpoint configuration
        CalculatorClient client = new CalculatorClient();

        // Call the Add service operation.
        double value1 = 100.00D;
        double value2 = 15.99D;
        double result = client.Add(value1, value2);
        Console.WriteLine("Add({0},{1}) = {2}", value1, value2, result);

        // Call the Subtract service operation.
        value1 = 145.00D;
        value2 = 76.54D;
        result = client.Subtract(value1, value2);
        Console.WriteLine("Subtract({0},{1}) = {2}", value1, value2, result);

        // Call the Multiply service operation.
        value1 = 9.00D;
        value2 = 81.25D;
        result = client.Multiply(value1, value2);
        Console.WriteLine("Multiply({0},{1}) = {2}", value1, value2, result);

        // Call the Divide service operation.
        value1 = 22.00D;
        value2 = 7.00D;
        result = client.Divide(value1, value2);
        Console.WriteLine("Divide({0},{1}) = {2}", value1, value2, result);

        //Closing the client gracefully closes the connection and cleans up resources
        client.Close();

        Console.WriteLine();
        Console.WriteLine("Press <ENTER> to terminate client.");
        Console.ReadLine();
    }
}

Compile and run the client.

Example

Security

Because the certificate used in this sample is a test certificate created with Makecert.exe, a security alert appears when you try to access an HTTPS address, such as https://localhost/servicemodelsamples/service.svc, from your browser.

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How to: Create a Custom Reliable Session Binding with HTTPS

To configure the service with a CustomBinding to use a reliable session with HTTPS

To configure the client with a CustomBinding to use a reliable session with HTTPS

Example

Security

See Also

Other Resources

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