code: func (g GitlabHook) Handle(w http.ResponseWriter, r *http.Request, repo *Repo) (int, error) {
  	if r.Method != "POST" {
  		return http.StatusMethodNotAllowed, errors.New("the request had an invalid method")
  	}
  
  	body, err := ioutil.ReadAll(r.Body)
  	if err != nil {
  		return http.StatusRequestTimeout, errors.New("could not read body from request")
  	}
  
  	err = g.handleToken(r, body, repo.Hook.Secret)
  	if err != nil {
  		return http.StatusBadRequest, err
  	}
  
  	event := r.Header.Get("X-Gitlab-Event")
  	if event == "" {
  		return http.StatusBadRequest, errors.New("the 'X-Gitlab-Event' header is required but was missing")
  	}
  
  	switch event {
  	case "Push Hook":
  		err = g.handlePush(body, repo)
  		if !hookIgnored(err) && err != nil {
  			return http.StatusBadRequest, err
  		}
  
  	// return 400 if we do not handle the event type.
  	default:
  		return http.StatusBadRequest, nil
  	}
  
  	return http.StatusOK, err
  }
docs: // Handle satisfies hookHandler.