HOW TO：擷取自訂繫結上的中繼資料

這個主題將描述如何擷取自訂繫結上 MEX 端點的中繼資料。這個範例中的程式碼是以 Custom Secure Metadata Endpoint 範例為基礎。

擷取自訂繫結上的中繼資料

1. 判定 MEX 端點使用的繫結。您可以藉由存取 WCF 服務的組態檔來判定服務的 MEX 繫結。在此例中，MEX 繫結會定義在下列服務組態中：

   <services>
       <service name="Microsoft.ServiceModel.Samples.CalculatorService"
               behaviorConfiguration="CalculatorServiceBehavior">
        <!-- Use the base address provided by the host. -->
        <endpoint address=""
          binding="wsHttpBinding"
          bindingConfiguration="Binding2"
          contract="Microsoft.ServiceModel.Samples.ICalculator" />
        <endpoint address="mex"
          binding="wsHttpBinding"
          bindingConfiguration="Binding1"
          contract="IMetadataExchange" />
        </service>
    </services>
    <bindings>
      <wsHttpBinding>
        <binding name="Binding1">
          <security mode="Message">
            <message clientCredentialType="Certificate" />
          </security>
        </binding>
        <binding name="Binding2">
          <reliableSession inactivityTimeout="00:01:00" enabled="true" />
          <security mode="Message">
            <message clientCredentialType="Certificate" />
          </security>
        </binding>
      </wsHttpBinding>
    </bindings>
   

2. 在用戶端組態檔中，設定相同的自訂繫結。在此用戶端也會定義 clientCredentials 行為以提供憑證，當要求 MEX 端點的中繼資料時可以用來驗證服務。當使用 Svcutil.exe 要求自訂繫結上的中繼資料時，您應該將 MEX 端點組態新增至 Svcutil.exe (Svcutil.exe.config) 的組態檔，並且端點組態的名稱應該符合 MEX 端點位址的 URI 結構描述：

     <system.serviceModel>
       <client>
         <endpoint name="http"
                   binding="wsHttpBinding"
                   bindingConfiguration="Binding1"
                   behaviorConfiguration="ClientCertificateBehavior"
                   contract="IMetadataExchange" />
       </client>
       <bindings>
         <wsHttpBinding>
           <binding name="Binding1">
             <security mode="Message">
               <message clientCredentialType="Certificate"/>
             </security>
           </binding>
         </wsHttpBinding>
       </bindings>
       <behaviors>
         <endpointBehaviors>
           <behavior name="ClientCertificateBehavior">
             <clientCredentials>
               <clientCertificate findValue="client.com" storeLocation="CurrentUser" storeName="My" x509FindType="FindBySubjectName" />
               <serviceCertificate>
                 <authentication certificateValidationMode="PeerOrChainTrust" />
               </serviceCertificate>
             </clientCredentials>
           </behavior>
         </endpointBehaviors>
       </behaviors>  
     </system.serviceModel>
   

3. 建立 MetadataExchangeClient 並呼叫 GetMetadata。有兩種方法可以這麼做：您可以在組態中指定自訂繫結，或是在程式碼中指定自訂繫結：

   // The custom binding is specified in configuration.
   EndpointAddress mexAddress = new EndpointAddress("https://localhost:8000/ServiceModelSamples/Service/mex");
   
   MetadataExchangeClient mexClient = new MetadataExchangeClient("http");
   mexClient.ResolveMetadataReferences = true;
   MetadataSet mexSet = mexClient.GetMetadata(mexAddress);
   
   // The custom binding is specified in code.
   // Specify the Metadata Exchange binding and its security mode.
   WSHttpBinding mexBinding = new WSHttpBinding(SecurityMode.Message);
   mexBinding.Security.Message.ClientCredentialType = MessageCredentialType.Certificate;
   
   // Create a MetadataExchangeClient and set the certificate details.
   MetadataExchangeClient mexClient = new MetadataExchangeClient(mexBinding);
   mexClient.SoapCredentials.ClientCertificate.SetCertificate(
       StoreLocation.CurrentUser, StoreName.My,
       X509FindType.FindBySubjectName, "client.com");
   mexClient.SoapCredentials.ServiceCertificate.Authentication.    CertificateValidationMode =    X509CertificateValidationMode.PeerOrChainTrust;
   mexClient.SoapCredentials.ServiceCertificate.SetDefaultCertificate(
       StoreLocation.CurrentUser, StoreName.TrustedPeople,
       X509FindType.FindBySubjectName, "localhost");
   MetadataExchangeClient mexClient2 = new MetadataExchangeClient(customBinding);
   mexClient2.ResolveMetadataReferences = true;
   MetadataSet mexSet2 = mexClient2.GetMetadata(mexAddress);
   

4. 建立 WsdlImporter 並呼叫 ImportAllEndpoints：

   WsdlImporter importer = new WsdlImporter(mexSet);
   ServiceEndpointCollection endpoints = importer.ImportAllEndpoints();
   

5. 此時，您會擁有服務端點的集合。如需有關匯入中繼資料的詳細資訊，請參閱 HOW TO：將中繼資料匯入服務端點。

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概念

中繼資料