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koa2-wechat-oauth

v1.0.7

Published

koa2版微信公共平台OAuth

Downloads

9

Readme

koa2-wechat-oauth

Wechat OAuth for async/await (koa2)。微信公共平台OAuth接口消息接口服务中间件与API SDK

功能列表

  • OAuth授权
  • 获取基本信息

OAuth2.0网页授权,使用此接口须通过微信认证,如果用户在微信中(Web微信除外)访问公众号的第三方网页,公众号开发者可以通过此接口获取当前用户基本信息(包括昵称、性别、城市、国家)。详见:官方文档

详细参见API文档

Installation

$ npm install koa2-wechat-oauth

Usage

初始化

引入OAuth并实例化

var OAuth = require('koa2-wechat-oauth');
var client = new OAuth('your appid', 'your secret');

以上即可满足单进程使用。 当多进程时,token需要全局维护,以下为保存token的接口。

var oauthApi = new OAuth('appid', 'secret', async (openid) => {
  // 传入一个根据openid获取对应的全局token的方法
  var txt = await fs.readFile(openid +':access_token.txt', 'utf8');
  return JSON.parse(txt);
}, async (openid, token) => {
  // 请将token存储到全局,跨进程、跨机器级别的全局,比如写到数据库、redis等
  // 这样才能在cluster模式及多机情况下使用,以下为写入到文件的示例
  // 持久化时请注意,每个openid都对应一个唯一的token!
  await fs.writeFile(openid + ':access_token.txt', JSON.stringify(token));
});

引导用户

生成引导用户点击的URL。

var url = client.getAuthorizeURL('redirectUrl', 'state', 'scope');

如果是PC上的网页,请使用以下方式生成

var url = client.getAuthorizeURLForWebsite('redirectUrl');

获取Openid和AccessToken

用户点击上步生成的URL后会被重定向到上步设置的 redirectUrl,并且会带有code参数,我们可以使用这个code换取access_token和用户的openid

var token = await client.getAccessToken('code');
var accessToken = token.data.access_token;
var openid = token.data.openid;

获取用户信息

如果我们生成引导用户点击的URL中scope参数值为snsapi_userinfo,接下来我们就可以使用openid换取用户详细信息(必须在getAccessToken方法执行完成之后)

var userInfo = await client.getUser('openid');

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