Merge pull request #32 from fcbhank/dev
fixes #25: 当access_token失效时，主动重新获取（最多重试3次）
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1872580421
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@ -7,6 +7,7 @@ import (
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"fmt"
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"io/ioutil"
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"log"
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"math"
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"mime/multipart"
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"net/http"
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"os"
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@ -38,6 +39,8 @@ var UploadMediaApi = "https://qyapi.weixin.qq.com/cgi-bin/media/upload?access_to
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/*------------------------------- 企业微信服务端API end -------------------------------*/
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const RedisTokenKey = "access_token"
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type Msg struct {
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Content string `json:"content"`
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}
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@ -89,13 +92,13 @@ func GetRemoteToken(corpId, appSecret string) string {
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}
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tokenResponse := ParseJson(string(respData))
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log.Println("企业微信获取access_token接口返回==>", tokenResponse)
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accessToken := tokenResponse["access_token"].(string)
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accessToken := tokenResponse[RedisTokenKey].(string)
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if RedisStat == "ON" {
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log.Println("prepare to set redis key")
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rdb := RedisClient()
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// access_token有效时间为7200秒(2小时)
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set, err := rdb.SetNX(ctx, "access_token", accessToken, 7000*time.Second).Result()
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set, err := rdb.SetNX(ctx, RedisTokenKey, accessToken, 7000*time.Second).Result()
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log.Println(set)
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if err != nil {
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log.Println(err)
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@ -136,20 +139,16 @@ func PostMsg(postData JsonData, postUrl string) string {
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return string(body)
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}
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// CheckOrUploadMedia 核对消息类型，如果为图片则上传临时素材并返回mediaId
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func CheckOrUploadMedia(msgType string, req *http.Request, accessToken string) string {
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if msgType != "image" {
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log.Println("消息类型不是图片")
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return ""
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}
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// UploadMedia 上传临时素材并返回mediaId
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func UploadMedia(msgType string, req *http.Request, accessToken string) (string, float64) {
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// 企业微信图片上传不能大于2M
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_ = req.ParseMultipartForm(2 << 20)
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imgFile, imgHeader, err := req.FormFile("media")
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log.Printf("文件大小==>%d字节", imgHeader.Size)
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if err != nil {
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log.Fatalln("图片文件出错==>", err)
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return ""
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// 自定义code无效的图片文件
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return "", 400
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}
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buf := new(bytes.Buffer)
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writer := multipart.NewWriter(buf)
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@ -171,28 +170,44 @@ func CheckOrUploadMedia(msgType string, req *http.Request, accessToken string) s
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log.Println("企业微信上传临时素材接口返回==>", mediaResp)
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if err != nil {
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log.Fatalln("上传临时素材出错==>", err)
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return ""
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return "", mediaResp["errcode"].(float64)
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} else {
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return mediaResp["media_id"].(string)
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return mediaResp["media_id"].(string), float64(0)
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}
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}
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// IsZero 判断企业微信服务端是否正常响应
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func IsZero(v interface{}) (bool, error) {
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t := reflect.TypeOf(v)
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if !t.Comparable() {
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return false, fmt.Errorf("type is not comparable: %v", t)
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// ValidateToken 判断accessToken是否失效
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// true-未失效, false-失效需重新获取
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func ValidateToken(errcode interface{}) bool {
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codeTyp := reflect.TypeOf(errcode)
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log.Println("errcode的数据类型==>", codeTyp)
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if !codeTyp.Comparable() {
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log.Printf("type is not comparable: %v", codeTyp)
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return true
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}
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return v == reflect.Zero(t).Interface(), nil
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// 如果errcode为42001表明token已失效，则清空redis中的token缓存
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// 已知codeType为float64
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if math.Abs(errcode.(float64)-float64(42001)) < 1e-3 {
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if RedisStat == "ON" {
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log.Printf("token已失效，开始删除redis中的key==>%s", RedisTokenKey)
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rdb := RedisClient()
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rdb.Del(ctx, RedisTokenKey)
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log.Printf("删除redis中的key==>%s完毕", RedisTokenKey)
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}
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log.Println("现需重新获取token")
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return false
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}
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return true
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}
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// 获取企业微信的access_token
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func getAccessToken() string {
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// GetAccessToken 获取企业微信的access_token
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func GetAccessToken() string {
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accessToken := ""
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if RedisStat == "ON" {
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log.Println("尝试从redis获取token")
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rdb := RedisClient()
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value, err := rdb.Get(ctx, "access_token").Result()
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value, err := rdb.Get(ctx, RedisTokenKey).Result()
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if err == redis.Nil {
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log.Println("access_token does not exist, need get it from remote API")
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}
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@ -222,6 +237,11 @@ func main() {
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// 设置日志内容显示文件名和行号
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log.SetFlags(log.LstdFlags | log.Lshortfile)
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wecomChan := func(res http.ResponseWriter, req *http.Request) {
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// 获取token
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accessToken := GetAccessToken()
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// 默认token有效
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tokenValid := true
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_ = req.ParseForm()
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sendkey := req.FormValue("sendkey")
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if sendkey != Sendkey {
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@ -230,10 +250,24 @@ func main() {
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msgContent := req.FormValue("msg")
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msgType := req.FormValue("msg_type")
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log.Println("mes_type=", msgType)
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// 刷新token
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accessToken := getAccessToken()
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mediaId := CheckOrUploadMedia(msgType, req, accessToken)
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log.Println("企业微信上传临时素材接口返回的media_id==>", mediaId)
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// 默认mediaId为空
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mediaId := ""
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if msgType != "image" {
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log.Println("消息类型不是图片")
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} else {
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// token有效则跳出循环继续执行，否则重试3次
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for i := 0; i <= 3; i++ {
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var errcode float64
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mediaId, errcode = UploadMedia(msgType, req, accessToken)
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log.Printf("企业微信上传临时素材接口返回的media_id==>[%s], errcode==>[%f]\n", mediaId, errcode)
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tokenValid = ValidateToken(errcode)
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if tokenValid {
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break
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}
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accessToken = GetAccessToken()
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}
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}
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// 准备发送应用消息所需参数
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postData := InitJsonData(msgType)
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@ -243,17 +277,23 @@ func main() {
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postData.Image = Pic{
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MediaId: mediaId,
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}
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// 再次刷新token
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accessToken = getAccessToken()
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sendMessageUrl := fmt.Sprintf(SendMessageApi, accessToken)
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postStatus := PostMsg(postData, sendMessageUrl)
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postResponse := ParseJson(postStatus)
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errcode := postResponse["errcode"]
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_, err := IsZero(errcode)
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if err != nil {
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log.Printf("%v", err)
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postStatus := ""
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for i := 0; i <= 3; i++ {
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sendMessageUrl := fmt.Sprintf(SendMessageApi, accessToken)
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postStatus = PostMsg(postData, sendMessageUrl)
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postResponse := ParseJson(postStatus)
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errcode := postResponse["errcode"]
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log.Println("发送应用消息接口返回errcode==>", errcode)
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tokenValid = ValidateToken(errcode)
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// token有效则跳出循环继续执行，否则重试3次
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if tokenValid {
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break
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}
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// 刷新token
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accessToken = GetAccessToken()
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}
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res.Header().Set("Content-type", "application/json")
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_, _ = res.Write([]byte(postStatus))
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}
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