public class HttpCalloutSample {

// Pass in the endpoint to be used using the string url
  public String getContent(String url) {

// Instantiate a new http object
    Http h = new Http();

// Instantiate a new HTTP request, specify the method (GET) as well as the endpoint
    HttpRequest req = new HttpRequest();
    req.setEndpoint(url);
    req.setMethod('GET');

// Send the request, and return a response
    HttpResponse res = h.send(req);
    return res.getBody();
  }

  public String testContent()
  {
      return 'Testing ... 1... 2... 3...';
  }
}