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The first way you can build a client-side proxy is to use the svcutilexe command-line tool Using svcutilexe, you can generate a new C# language file that represents the proxy code itself, as well as a client-side configuration file You can do this by specifying the service s endpoint as the first parameter You use the /out: flag to define the name of the *cs file containing the proxy, and you use the /config: option to specify the name of the generated client-side *config file Assuming your service is currently running, the following command set passed into svcutilexe will generate two new files in the working directory (which should, of course, be entered as a single line within a Visual Studio 2010 command prompt): svcutil http://localhost:8080/MagicEightBallService /out:myProxycs /config:appconfig If you open the myProxy.

End Sub Public Shared Function GenerateKey(ByVal targetFile As String) As String End Function Private Shared Sub ReadKey(ByVal algorithm As RSACryptoServiceProvider, ByVal keyFile As String) End Sub Public Shared Function EncryptData(ByVal data As String, ByVal publicKey As String) As Byte() End Function Public Shared Function DecryptData(ByVal data As Byte(), ByVal keyFile As String) As String End Function End Class The GenerateKey method creates an instance of the RSA algorithm for generating the key. It stores only the private key in the file secured through the DPAPI and returns the public key representation as a string. Public Shared Function GenerateKey(ByVal targetFile As String) As String Dim Algorithm As New RSACryptoServiceProvider() ' Save the private key Dim CompleteKey As String = Algorithm.ToXmlString(True) Dim KeyBytes As Byte() = Encoding.UTF8.GetBytes(CompleteKey) KeyBytes = ProtectedData.Protect(KeyBytes, Nothing, DataProtectionScope.LocalMachine) Using fs As New FileStream(keyFile, FileMode.Open) fs.Write(KeyBytes, 0, KeyBytes.Length) End Using ' Return the public key Return Algorithm.ToXmlString(False) End Function The caller of the function needs to store the public key somewhere; this is necessary for encrypting information. You can retrieve the key as an XML representation through a method called ToXmlString(). The parameter specifies whether private key information is included (True) or not (False). Therefore, the GenerateKey function first calls the function with the True parameter to store the complete key information in the file and then calls it with the False parameter to include the public key only. Subsequently, the ReadKey() method just reads the key from the file and then initializes the passed algorithm instance through FromXmlString(), the opposite of the ToXmlString() method:

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cs file, you will find a client-side representation of the IEightBall interface, as well as a new class named EightBallClient, which is the proxy class itself This class derives from the generic class, SystemServiceModelClientBase<T>, where T is the registered service interface In addition to a number of custom constructors, each method of the proxy (which is based on the original interface methods) will be implemented to use the inherited Channel property to invoke the correct service method Here is a partial snapshot of the proxy type: [SystemDiagnosticsDebuggerStepThroughAttribute()] [SystemCodeDomCompilerGeneratedCodeAttribute("SystemServiceModel", "4000")] public partial class EightBallClient : SystemServiceModelClientBase<IEightBall>, IEightBall { .. public string ObtainAnswerToQuestion(string userQuestion) { return baseChannel.

If you are an AS developer, you may have developed many applications using XML or SOAP. Adopting BlazeDS means your application will load data up to 10 times faster than with those text-based formats, as it employs an AMF (Action Message Format) data transfer format. (AMF is based on SOAP. If you re from an AS and Flash background, you should be familiar with AMF; if you re from a Java background, you just need to know AMF is much faster than standard SOAP in this environment).

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