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wechat-oauth

v1.5.0

Published

微信公共平台OAuth

Downloads

6,122

Readme

wechat-oauth

微信公共平台OAuth接口消息接口服务中间件与API SDK

模块状态

  • NPM version
  • Build Status
  • Dependencies Status
  • Coverage Status

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 wechat-oauth

Usage

初始化

引入OAuth并实例化

var OAuth = require('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', function (openid, callback) {
  // 传入一个根据openid获取对应的全局token的方法
  // 在getUser时会通过该方法来获取token
  fs.readFile(openid +':access_token.txt', 'utf8', function (err, txt) {
    if (err) {return callback(err);}
    callback(null, JSON.parse(txt));
  });
}, function (openid, token, callback) {
  // 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!
  fs.writeFile(openid + ':access_token.txt', JSON.stringify(token), callback);
});

附上全局维护AccessToken的示例代码:

Mongodb|mongoose

var TokenSchema = new Schema({
  access_token: String,
  expires_in: Number,
  refresh_token: String,
  openid: String,
  scope: String,
  create_at: String
});

自定义getToken方法

TokenSchema.statics.getToken = function (openid, cb) {
  this.findOne({openid:openid}, function (err, result) {
    if (err) throw err;
    return cb(null, result);
  });
};

自定义saveToken方法

TokenSchema.statics.setToken = function (openid, token, cb) {
  // 有则更新,无则添加
  var query = {openid: openid};
  var options = {upsert: true};
  this.update(query, token, options, function (err, result) {
    if (err) throw err;
    return cb(null);
  });
};

mongoose.model('Token', 'TokenSchema');

初始化:

var client = new OAuth(appid, secret, function (openid, callback) {
  // 传入一个根据openid获取对应的全局token的方法
  // 在getUser时会通过该方法来获取token
  Token.getToken(openid, callback);
}, function (openid, token, callback) {
  // 持久化时请注意,每个openid都对应一个唯一的token!
  Token.setToken(openid, token, callback);
});

MySQL:

建表SQL

CREATE TABLE `token` (
  `access_token` varchar(200) COLLATE utf8_bin NOT NULL COMMENT '令牌',
  `expires_in` varchar(10) COLLATE utf8_bin NOT NULL COMMENT '有效期',
  `refresh_token` varchar(200) COLLATE utf8_bin NOT NULL COMMENT '刷新参数',
  `openid` varchar(50) COLLATE utf8_bin NOT NULL COMMENT '用户编号',
  `scope` varchar(50) COLLATE utf8_bin NOT NULL COMMENT '作用域',
  `create_at` varchar(20) COLLATE utf8_bin NOT NULL COMMENT '令牌建立时间'
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin COMMENT='微信令牌表';

设置openid为唯一索引

ALTER TABLE `token`
  ADD UNIQUE KEY `openid` (`openid`);

使用示例:

var client = new Oauth(appid, secret, function (openid, callback) {
  var sql = 'SELECT * FROM token WHERE openid = ?';
  db.query(sql, [openid], function (err, result) {
    if(err) {
      return callback(err);
    }
    return callback(null, result[0]);
  });
}, function (openid, token, callback) {
  var sql = 'REPLACE INTO token(access_token, expires_in, refresh_token, openid, scope, create_at) VALUES(?, ?, ?, ?, ?, ?)';
  var fields = [token.access_token, token.expires_in, token.refresh_token, token.openid, token.scope, token.create_at];
  db.query(sql, fields, function (err, result) {
    return callback(err);
  });
});

小程序初始化

使用小程序时,需要在初始化OAuth时指定isMiniProgram参数为true

单进程

var OAuth = require('wechat-oauth');
var client = new OAuth('your appid', 'your secret', null, null, true); // 最后一个参数即isMiniProgram

多进程

var oauthApi = new OAuth('appid', 'secret', getToken, saveToken, true);

注意:微信不会将用户的sessionKey过期时间告知开发者,该时间会根据用户与小程序互动频繁程度等因素发生变化,建议根据小程序客户端wx.checkSession()方法检验凭证是否依旧有效,若失效应该再次使用code换取新的sessionKey。故而此例中的getTokensaveToken方法过期机制须有不同。 官方文档

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

client.getAccessToken('code', function (err, result) {
  var accessToken = result.data.access_token;
  var openid = result.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)

client.getUser(openid, function (err, result) {
  var userInfo = result;
});

捐赠

如果您觉得Wechat OAuth对您有帮助,欢迎请作者一杯咖啡

捐赠wechat

交流群

QQ群:157964097,使用疑问,开发,贡献代码请加群。

Contributors

感谢以下贡献者:

$ git summary

 project  : wechat-oauth
 repo age : 2 years, 2 months
 active   : 13 days
 commits  : 29
 files    : 11
 authors  :
    24  Jackson Tian  82.8%
     1  Kainy Guo     3.4%
     1  Teng Fei      3.4%
     1  cherry-geqi   3.4%
     1  welch         3.4%
     1  wzw           3.4%

License

The MIT license.