kf user nick name to acc id has been tested.

kfuser.go

+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"time"
+)
+
+type kfInfo struct {
+	Acc    string `json:"kf_account"`    //
+	Nick   string `json:"kf_nick"`       //
+	ID     int    `json:"kf_id"`         //
+	Avatar string `json:"kf_headimgurl"` //
+}
+
+//KFUserList a list of kf users
+type kfUserList struct {
+	KfList []kfInfo `json:"kf_list"`
+}
+
+//KFCache KF user's info cache
+type kfCache struct {
+	Name2Acc map[string]string //map nickname to account id
+	ID2Acc   map[int]string    //map from id to acc
+	Users    kfUserList
+	UpdateAt int32 //time stamp
+	Expire   int32 //time stamp
+}
+
+func getKFlistURL() string {
+	atk, _ := GetAccessToken()
+	return fmt.Sprintf("https://api.weixin.qq.com/cgi-bin/customservice/getkflist?access_token=%s", atk)
+}
+
+func (m *kfCache) getKFUsers() (err error) {
+	jstr, err := m.kfGetListJSON()
+	err = json.Unmarshal([]byte(jstr), &m.Users)
+	return
+}
+
+func (m *kfCache) kfAcc(nickname string) (acc string) {
+	m.kfRenewList()
+	return m.Name2Acc[nickname]
+}
+
+func (m *kfCache) kfGetListJSON() (jstr string, err error) {
+	url := getKFlistURL()
+	resp, err := http.Get(url)
+	if err != nil {
+		return
+	}
+	b, err := ioutil.ReadAll(resp.Body)
+	if err == nil {
+		jstr = string(b)
+	}
+	return
+}
+
+func (m *kfCache) kfRenewList() {
+	if m.Expire == 0 || m.UpdateAt == 0 || m.Expire < m.UpdateAt {
+		log.Println("Renew Kf Info List")
+		err := m.getKFUsers()
+		if err == nil {
+			m.Name2Acc = map[string]string{}
+			m.ID2Acc = map[int]string{}
+			for _, v := range m.Users.KfList {
+				m.Name2Acc[v.Nick] = v.Acc
+				m.ID2Acc[v.ID] = v.Acc
+			}
+			m.UpdateAt = int32(time.Now().Unix())
+			m.Expire = m.UpdateAt + 1200 //20 minutes
+		}
+	}
+}
+
+func (m *kfCache) kfGetInfo(nick string) (r kfInfo) {
+	m.kfRenewList()
+	for _, v := range m.Users.KfList {
+		if nick == v.Nick {
+			return v
+		}
+	}
+	return
+}

kfuser_test.go

+package main
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+)
+
+func TestKfList(t *testing.T) {
+	SetupConfig()
+	now := int32(time.Now().Unix())
+
+	s := kfCache{}
+	r := s.kfGetInfo("孙鹏") //will trigger load info
+	AssertEqual(t, r.Acc, "kf2001@gh_f09231355c68", "kf account str mismatch")
+	AssertEqual(t, r.ID, 2001, "kf account id should be 2001")
+	avatarurl := "http://mmbiz.qpic.cn/mmbiz_jpg/WiaVAicTdo7zMrD65vOsqRVQL6YlSPkzhp6y8ksIjd3yOfYu2xe9w7jAbdBIFoic3Bh4fWkvUzOW29u9FN0tDXG2Q/300?wx_fmt=jpeg"
+	AssertEqual(t, r.Avatar, avatarurl, "kf avatar url mismatch")
+
+	//get kfacc by name
+	id := s.kfAcc("孙鹏")
+	AssertEqual(t, id, "kf2001@gh_f09231355c68", "kf account id should be kf2001@gh_f09231355c68")
+
+	//test cache
+	AssertEqual(t, s.Expire > s.UpdateAt, true, "expire should after update")
+	AssertEqual(t, s.UpdateAt >= now, true, "expire should after update")
+
+	orig := s
+	s.kfRenewList()
+	s.kfRenewList()
+	AssertEqual(t, orig.Expire, s.Expire, "time stamp should still be the same")
+
+}
+
+func TestJsonStructure(t *testing.T) {
+	sample := `
+{
+    "kf_list": [
+        {
+            "kf_account": "kf2001@gh_f09231355c68",
+            "kf_headimgurl": "http:\/\/mmbiz.qpic.cn\/mmbiz_jpg\/WiaVAicTdo7zMrD65vOsqRVQL6YlSPkzhp6y8ksIjd3yOfYu2xe9w7jAbdBIFoic3Bh4fWkvUzOW29u9FN0tDXG2Q\/300?wx_fmt=jpeg",
+            "kf_id": 2001,
+            "kf_nick": "孙鹏",
+            "kf_wx": "lawipac"
+        },
+        {
+            "kf_account": "kf2002@gh_f09231355c68",
+            "kf_headimgurl": "http:\/\/mmbiz.qpic.cn\/mmbiz_jpg\/WiaVAicTdo7zMZVRDmRUIkaV0Uiardfw9VbvqicgtWAbM6jYKaDdScKAtahICB204fCiaz8Ucb3VyGIjKEWicIjhMzUw\/300?wx_fmt=jpeg",
+            "kf_id": 2002,
+            "kf_nick": "理事",
+            "invite_wx": "x707184846",
+            "invite_expire_time": 1495195006,
+            "invite_status": "expired"
+        }
+    ]
+}    
+    `
+	k := kfUserList{}
+	err := json.Unmarshal([]byte(sample), &k)
+	AssertEqual(t, err, nil, "decode json should have no error")
+	AssertEqual(t, len(k.KfList), 2, "should have 2 kf users")
+	AssertEqual(t, k.KfList[0].Acc, "kf2001@gh_f09231355c68", "first acc mismatch")
+	AssertEqual(t, k.KfList[1].Acc, "kf2002@gh_f09231355c68", "second acc mismatch")
+
+}

sample_data/kflist.json

+{
+    "kf_list": [
+        {
+            "kf_account": "kf2001@gh_f09231355c68",
+            "kf_headimgurl": "http:\/\/mmbiz.qpic.cn\/mmbiz_jpg\/WiaVAicTdo7zMrD65vOsqRVQL6YlSPkzhp6y8ksIjd3yOfYu2xe9w7jAbdBIFoic3Bh4fWkvUzOW29u9FN0tDXG2Q\/300?wx_fmt=jpeg",
+            "kf_id": 2001,
+            "kf_nick": "孙鹏",
+            "kf_wx": "lawipac"
+        },
+        {
+            "kf_account": "kf2002@gh_f09231355c68",
+            "kf_headimgurl": "http:\/\/mmbiz.qpic.cn\/mmbiz_jpg\/WiaVAicTdo7zMZVRDmRUIkaV0Uiardfw9VbvqicgtWAbM6jYKaDdScKAtahICB204fCiaz8Ucb3VyGIjKEWicIjhMzUw\/300?wx_fmt=jpeg",
+            "kf_id": 2002,
+            "kf_nick": "理事",
+            "invite_wx": "x707184846",
+            "invite_expire_time": 1495195006,
+            "invite_status": "expired"
+        }
+    ]
+}