indicate error when there is not openID for register new user.

eventSubscribe.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
 	"io/ioutil"
 	"log"
@@ -26,7 +27,7 @@ func onSubscribe(in InWechatMsg) {
 		//get user info from wechat
 		info := WechatUserInfo{}
 		info.getUserInfo(openID, "zh_CN")
-		info.registerNewUserWithInfo(in)
+		info.registerNewLeadWithInfo(in)
 		in.askUserFillupBasicInfo()
 	}
 	//some error happened
@@ -99,7 +100,13 @@ func sendGreeting4ExistingUser(in InWechatMsg, info crmdLead) {
 
 }
 
-func (m *WechatUserInfo) registerNewUserWithInfo(in InWechatMsg) (newuser crmdLead, err error) {
+func (m *WechatUserInfo) registerNewLeadWithInfo(in InWechatMsg) (newuser crmdLead, err error) {
+	if in.header.FromUserName == "" {
+		log.Println("Error: trying to register user without OpenID")
+		err = errors.New("registerNewLeadWithInfo: no user OpenID")
+		return
+	}
+
 	u := crmdLead{}
 	u.FirstName = "\u0020" //a visible space
 	if m.NickName == "" {

eventSubscribe_test.go

@@ -75,7 +75,7 @@ func TestRegisterNewUser(t *testing.T) {
 	in.header.FromUserName = "abc"
 	s := WechatUserInfo{}
 	json.Unmarshal([]byte(msg), &s)
-	newuser, err := s.registerNewUserWithInfo(in)
+	newuser, err := s.registerNewLeadWithInfo(in)
 	AssertEqual(t, err, nil, "should be successfully added new user")
 	AssertEqual(t, newuser.WechatHitxyID, in.header.FromUserName, "wechat_hitxy_id mismatch")
 	log.Printf("created temp Lead %s ", newuser.ID)