opms_backend/opms_libary/plugin/dingtalk/context/context.go

package context

import (
	"encoding/json"
	"fmt"
	"github.com/gogf/gf/frame/g"
	"sync"
	"time"
)

const (
	//AccessTokenURL 获取access_token的接口
	AccessTokenURL = "https://oapi.dingtalk.com/gettoken"
)

//ResAccessToken 结构体
type ResAccessToken struct {
	AccessToken string `json:"access_token"`
	ExpiresIn   int64  `json:"expires_in"`
	Code        int64  `json:"errcode"`
	Msg         string `json:"errmsg"`
}

type Context struct {
	*Config

	//accessTokenLock 读写锁 同一个AppKey一个
	accessTokenLock *sync.RWMutex
}

//SetAccessTokenLock 设置读写锁（一个appID一个读写锁）
func (ctx *Context) SetAccessTokenLock(l *sync.RWMutex) {
	ctx.accessTokenLock = l
}

//GetAccessToken 获取access_token
func (ctx *Context) GetAccessToken() (accessToken string, err error) {
	ctx.accessTokenLock.Lock()
	defer ctx.accessTokenLock.Unlock()

	accessTokenCacheKey := fmt.Sprintf("access_token_%s", ctx.AppKey)
	val, _ := ctx.Cache.Get(accessTokenCacheKey)
	if val != nil {
		accessToken = val.(string)
		return
	}

	//从钉钉服务器获取
	var resAccessToken ResAccessToken
	resAccessToken, err = ctx.GetAccessTokenFromServer()
	if err != nil {
		return
	}

	accessToken = resAccessToken.AccessToken
	return
}

//CleanAccessTokenCache clean cache
func (ctx *Context) CleanAccessTokenCache() {
	accessTokenCacheKey := fmt.Sprintf("access_token_%s", ctx.AppKey)
	ctx.Cache.Remove(accessTokenCacheKey)
}

//GetAccessTokenFromServer 强制从服务器获取token
func (ctx *Context) GetAccessTokenFromServer() (token ResAccessToken, err error) {
	url := fmt.Sprintf("%s?appkey=%s&appsecret=%s", AccessTokenURL, ctx.AppKey, ctx.AppSecret)
	body := g.Client().GetBytes(url)
	err = json.Unmarshal(body, &token)
	if err != nil {
		return
	}
	if token.Code != 0 {
		err = fmt.Errorf("get access_token error : errcode=%v , errormsg=%v", token.Code, token.Msg)
		return
	}

	accessTokenCacheKey := fmt.Sprintf("access_token_%s", ctx.AppKey)
	expires := token.ExpiresIn - 1500
	err = ctx.Cache.Set(accessTokenCacheKey, token.AccessToken, time.Duration(expires)*time.Second)
	return
}