How to retrieve data using Http Request and Http Response from WCF web service and setting using Apex class? [closed]

Question

I am a beginner in Salesforce. I am getting the data from the WCF web Service but I am not able to get data using the Apex class. I will appreciate any kind of help. Thank you in advance.

First, I did this using C# WCF web service and it is working. Now these data, I have to insert in a VF page. So this Apex class code is used for retrieving these data from that WCF web Service. I am getting these data when I directly open this service link in the browser. So I am not able to understand why I am not getting in Apex code and not able to see in that VF page.

Here's the code:

objReq.setEndpoint('http://localhost:46755/DemoService.svc/GetProductsByid');
   objReq.setMethod('GET');
   String bdy = '{id:"10098765"}';
   objReq.setBody(bdy);
            if(!Test.isRunningTest())
            {                
                objResp = objHttp.send(objReq);
                System.debug(objReq.toString());
                if(objResp.getStatusCode() == 200){
                String resBody = objResp.getBody().replaceAll('Currency','CurrencyData'); 
                resBody = resBody.replaceAll('Number','numberData');

                System.debug('  Res  '+((Main_Class) System.JSON.deserialize(resBody, Main_Class.class)).GetProductsByidResult.resultList);

              return ((Main_Class) System.JSON.deserialize(resBody, Main_Class.class)).GetProductsByidResult.resultList;
                }

Answer 1

You need to consider that Salesforce's server's are located out on the Internet and for one of those server's "localhost" would be the server itself not the local to your office machine that you have setup your demo service on at "http://localhost:46755/DemoService.svc". For Salesforce to call in to such a local machine you would have to have your firewall setup to allow access and provide the machine's IP address in the URL.

If you are just working on the Apex side of this, it is much easier to just pick some pre-existing service already available on the Internet and call that.