// Fetch makes network calls using the method (POST/GET..), the URL // to hit, headers to add (if any), and the body of the request.
// Feel free to add more stuff to before/after making the actual n/w call!
func Fetch(method string, url string, header map[string]string, body io.Reader) (*http.Response, err) {
  // Create client with required custom parameters.
  // Options: Disable keep-alives, 30sec n/w call timeout.
  client := &http.Client{
      Transport: &http.Transport{
          DisableKeepAlives: true,
      },
      Timeout: time.Duration(10 * time.Second),
  }
  // Create request.
  req, _ := http.NewRequest(method, url, body)
  // Add any required headers.
  for key, value := range header {
      req.Header.Add(key, value)
  } 
  // Perform said network call.
  res, err := client.Do(req)
      if err != nil {
      glog.Error(err.Error())   // use glog it's amazing
      return nil, err
  }
  // If response from network call is not 200, return error too.
  if res.StatusCode != http.StatusOK {
      return res, errors.New("Network call did not return SUCCESS!")
  }
  return res, nil
}