今天，按流水线写文档

    1. /* app.js 调用定时器方法*/
    2. const schedule = require('./utils/schedule');
    4. schedule.setSchedule();
    1. /* /utils/schedule 定时器方法 */
    2. const schedule = require('node-schedule');
    3. const { updateToken } = require('./updateToken'); // 刷新token的方法
    5. //其他规则见 https://www.npmjs.com/package/node-schedule
    6. let rule = new schedule.RecurrenceRule();
    7. // rule.hour = [0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22];
    8. // 每小时的第30分钟调用
    9. rule.hour = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23];
    10. rule.minute = 30;
    12. function setSchedule() {
    13.   schedule.scheduleJob(rule, () => {
    14.     updateToken(); // 定时点到了就调用
    15.   })
    16. };
    18. module.exports = {
    19.   setSchedule
    20. };
    1. /* 
    2.  * updateToken.js 定时刷新token 
    3.  * 微信js-sdk文档：https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html
    4.  * 附录1，讲解token刷新规则：https://developers.weixin.qq.com/doc/offiaccount/OA_Web_Apps/JS-SDK.html#62
    5. */
    6. const jssdkConfig = require('../config/jssdk');
    7. const request = require('./request').get;
    8. const redis = require('./redis'); // redis使用看文档：https://www.yuque.com/xiebugde/mbz0hg/dou4fg
    10. exports.updateToken = async () => {
    11.   const url = jssdkConfig.getTokenUrl;
    12.   const params = {
    13.     grant_type: jssdkConfig.grant_type,
    14.     appid: jssdkConfig.appid,
    15.     secret: jssdkConfig.secret,
    16.   };
    17.   const opts = {};
    18.   const result = await request(url, params, opts);
    19.   if (result.access_token) {
    20.     await redis.set('token', result.access_token);
    21.     updateTicket();
    22.   } else {
    23.     console.log('获取token失败', result);
    24.   }
    25. };
    27. const updateTicket = async () => {
    28.   let token = '';
    29.   await redis.get('token', (err, result) => {
    30.     token = result;
    31.   });
    32.   const url = jssdkConfig.getTicketUrl;
    33.   const params = {
    34.     access_token: token,
    35.     type: jssdkConfig.type,
    36.   };
    37.   const opts = {};
    38.   const result = await request(url, params, opts);
    39.   if (result.errcode === '0' || result.errcode === 0) {
    40.     redis.set('ticket', result.ticket);
    41.   } else {
    42.     console.log('获取ticket失败', result);
    43.   }
    44. };

    如果前端要做微信分享，需要写个接口返回签名等信息，接口如下

    1. const sha1 = require("sha1");
    2. const redis = require("../utils/redis");
    3. const jssdkConfig = require('../config/jssdk');
    4. const { getNonceStr } = require('../utils/sign'); // 看下文
    6. router.post('/GetJSConfig', async (ctx, next) => {
    7.   let ticket = '';
    8.   await redis.get('ticket', (err, result) => {
    9.     ticket = result;
    10.   })
    11.   const timestamp = Date.parse(new Date()) / 1000;
    12.   const nonceStr = getNonceStr(15); // 15位字母和数字的随机数
    13.   const url = ctx.request.body.url;
    14.   const signature = sha1(`jsapi_ticket=${ticket}&noncestr=${nonceStr}&timestamp=${timestamp}&url=${url}`);
    16.   const result = {
    17.     appId: jssdkConfig.appid,
    18.     timestamp,
    19.     signature,
    20.     jsApiList: [
    21.       'onMenuShareWeibo',
    22.       'updateAppMessageShareData',
    23.       'updateTimelineShareData',
    24.     ]
    25.   };
    26.   ctx.body = result;
    27. });

    获取签名的方法

    1. /* utils/sign.js 获取15位字母和数字的随机数 */
    2. exports.getNonceStr = len => {
    3.   var rdmString = "";
    4.   for (; rdmString.length < len; rdmString += Math.random().toString(36).substr(2));
    5.   return rdmString.substr(0, len);
    6. }