This article mainly introduces examples of Node.js WeChat access_token (jsapi_ticket) access and refresh, which has certain reference value. Those who are interested can learn more about it. I hope it can help everyone.
access_token
There are two access_tokens in WeChat documents: ordinary access_token and web page authorization access_token. For specific differences, please refer to: https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1421140842
The access_token mentioned below are all ordinary access_token
1. First of all Let’s first take a look at how to request access_token? WeChat public platform technical documentation
GET request: https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=APPID&secret=APPSECRET
Normal return: {"access_token":"ACCESS_TOKEN","expires_in":7200}
Error return: {"errcode":40013,"errmsg": "invalid appid"}
2. So the code to obtain access_token is as follows:
const request = require('request') // 请安装第三方包 request request.get({ uri: 'https://api.weixin.qq.com/cgi-bin/token', json: true, qs: { grant_type: 'client_credential', appid: APPID, // APPID请换成你的 appid secret: APPSECRET // APPSECRET请换成你的 appsecret } }, (err, res, body) => { if (err) { console.log(err) return } console.log(body) if (body.errcode) { // 返回错误时的处理 return } })
3. guard_dog implements data persistence and regular refresh
guard_dog will generate .dog files, each file corresponds to a KEY
const guard_dog = require('guard_dog') // 请安装第三方包 guard_dog guard_dog.init(KEY, (handler) => { // KEY是guard_dog存取数据的键名 // 拿到数据后调用 handler handler(DATA, EXPIREDS_IN) // DATA是要持久化的数据,EXPIREDS_IN是数据的有效时间,单位是秒 }, DIR) // DIR是 .dog 文件的存放目录,这个参数可以不传
4. Now combine the above two pieces of code to get what we want The effect
const request = require('request') const guard_dog = require('guard_dog') guard_dog.init('ACCESS_TOKEN', (handler) => { request.get({ uri: 'https://api.weixin.qq.com/cgi-bin/token', json: true, qs: { grant_type: 'client_credential', appid: APPID, // APPID请换成你的 appid secret: APPSECRET // APPSECRET请换成你的 appsecret } }, (err, res, body) => { if (err) { console.log(err) return } console.log(body) if (body.errcode) { return } handler(body.access_token, body.expires_in) }) }) // 如有需要指定目录,可以再给 guard_dog.init 多传个参数
5. After guard_dog initializes this key, all valid values obtained. The code for guard_dog to obtain the value is as follows:
guard_dog.get('ACCESS_TOKEN', (data) => { // 上面初始化时用的键名为'ACCESS_TOKEN',所以这里取值也要用这个键名 // 在这里拿到的 data 就是 access_token 了 })
6. If you want to make it more convenient, you can directly encapsulate it into a module
access_token.js
const request = require('request') const guard_dog = require('guard_dog') // 加载这个模块的时候给 ACCESS_TOKEN 这个键名初始化 guard_dog.init('ACCESS_TOKEN', (handler) => { request.get({ uri: 'https://api.weixin.qq.com/cgi-bin/token', json: true, qs: { grant_type: 'client_credential', appid: APPID, // APPID请换成你的 appid secret: APPSECRET // APPSECRET请换成你的 appsecret } }, (err, res, body) => { if (err) { console.log(err) return } console.log(body) if (body.errcode) { return } handler(body.access_token, body.expires_in) }) }) // 只要向外暴露一个获取值的方法就可以了 module.exports = function (callback) { guard_dog.get('ACCESS_TOKEN', callback) }
Usage:
const access_token = require('./access_token') // 这里把这个模块与 access_token 模块当成在同一目录下来作为例子。 access_token((data) => { // 这个 data 就是 access_token })
jsapi_ticket
jsapi_ticket Official document description
The above example about access_token has been explained in detail. The processing of jsapi_ticket is also very similar, so the code is directly posted below:
(One thing to note: getting jsapi_ticket needs to rely on access_token. The following code directly relies on the above. Written in access_token.js)
jsapi_ticket.js
const request = require('request') const guard_dog = require('guard_dog') const access_token = require('./access_token') guard_dog.init('JSAPI_TICKET', (handler) => { access_token((access_token) => { request.get({ uri: 'https://api.weixin.qq.com/cgi-bin/ticket/getticket', json: true, qs: { access_token: access_token, type: 'jsapi' } }, (err, res, body) => { if (err) { console.log(err) return } console.log(body) if (body.errcode) { return } handler(body.ticket, body.expires_in) }) }) }) module.exports = function (callback) { guard_dog.get('JSAPI_TICKET', callback) }
Use:
const jsapi_ticket = require('./jsapi_ticket') jsapi_ticket((data) => { // 这个 data 就是 jsapi_ticket })
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