Method pingResponse

dgraph/cmd/zero/http.go:256–289

(w http.ResponseWriter, r *http.Request)

}

func (st *state) pingResponse(w http.ResponseWriter, r *http.Request) {
	x.AddCorsHeaders(w)

	/*
	 * zero is changed to also output the health in JSON format for client
	 * request header "Accept: application/json".
	 *
	 * Backward compatibility- Before this change the '/health' endpoint
	 * used to output the string OK. After the fix it returns OK when the
	 * client sends the request without "Accept: application/json" in its
	 * http header.
	 */
	switch r.Header.Get("Accept") {
	case "application/json":
		resp, err := (st.zero).zeroHealth(r.Context())
		if err != nil {
			x.SetStatus(w, x.Error, err.Error())
			return
		}
		w.Header().Set("Content-Type", "application/json; charset=utf-8")
		w.WriteHeader(http.StatusOK)
		if _, err := w.Write(resp.Json); err != nil {
			glog.Warningf("http error send failed, error msg=[%v]", err)
			return
		}
	default:
		w.Header().Set("Content-Type", "text/plain; charset=utf-8")
		w.WriteHeader(http.StatusOK)
		if _, err := w.Write([]byte("OK")); err != nil {
			glog.Warningf("http error send failed, error msg=[%v]", err)
			return
		}
	}
}