wsdl not showing XML-WCF - wcf

Question

When calling service url https://example.com/TestService.svc I am getting the below 2 URLs but when I am trying to click on WSDL then it is not working.
WSDL URLs
http://example.com/TestService.svc?wsdl -- NOT WORKING
http://example.com/TestService.svc?singleWsdl -- NOT WORKING
Manually change http to https
https://example.com/TestService.svc?wsdl -- WORKING
https://example.com/TestService.svc?singleWsdl -- WORKING
Client Config
<endpoint address="mex" binding="mexHttpsBinding" contract="IMetadataExchange" />
</client>
<behaviors>
<serviceBehaviors>
<clear/>
<behavior>
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment aspNetCompatibilityEnabled="false" multipleSiteBindingsEnabled="true" minFreeMemoryPercentageToActivateService="0" />
Main Service Config
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<clear />
<behavior>
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<protocolMapping>
<add binding="basicHttpsBinding" scheme="https" />
</protocolMapping>
<serviceHostingEnvironment aspNetCompatibilityEnabled="false" multipleSiteBindingsEnabled="true" minFreeMemoryPercentageToActivateService="0">
<serviceActivations>
<clear />
<add factory="DataServicesHost.UnityServiceHostFactory" relativeAddress="TestService.svc" service="TestService.Service" />
</serviceActivations>
</serviceHostingEnvironment>
Service Consuming
var customHeader = new MessageHeader<Security>(security);
var tempHeader = customHeader.GetUntypedHeader("Security", "http://tempuri.org/");
var client = new ServiceClient();
using (var scope = new OperationContextScope(client.InnerChannel))
{
OperationContext.Current.OutgoingMessageHeaders.Add(tempHeader);
objDataRequest = client.DataRequest("test");
}

Answer 1

From the above configuration, we can infer that it belongs to the client-side. However, the WSDL feature of the WCF service is set up on the server-side. It is controlled by the ServiceMetadata section.
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>
Therefore, if we want to have the HTTP protocol of WSDL feature working, we need to enable it on the server-side and apply the service behavior in the service section(the endpoint should be within the service section instead of client section).
<system.serviceModel>
<services>
<service name="WcfService3.Service1" behaviorConfiguration="sb">
<endpoint address="" binding="basicHttpBinding" contract="WcfService3.IService1"></endpoint>
<endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange"></endpoint>
</service>
</services>
<behaviors>
<serviceBehaviors>
<behavior name="sb">
<serviceMetadata httpGetEnabled="true" httpsGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true"/>
</behavior>
</serviceBehaviors>
</behaviors>
Feel free to let me know if there is anything I can help with.