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微信小程序出现“invalid code”怎么办

Jun 06, 2016 pm 08:38 PM
php Micro-channel public platform

微信小程序出现“invalid code”的解决方法:我们只需要在开发者工具的详情界面中修改Appid即可。小程序分发的code是与appid绑定的,仅当前申请code的appid才可使用。

微信小程序出现“invalid code”怎么办

微信小程序出现“invalid code”怎么办?

微信小程序登陆模块invalid code问题

说明:笔者开发时使用的是测试appid,个人有申请过一个appid,所以后端使用申请的appid

问题:前端使用wx.login得到code,后端从微信服务器获取openid,但返回的结果是"invalid code"

errcode: 40029, errmsg: "invalid code, hints: [ req_id: HQd79a0747th31 ]
Copy after login

解决思路:

前端获取的code是微信服务器给测试的appid分配的,而后端使用的是申请的appid,后端带着appid和code去申请openid时,微信服务器会找不到对应的code,所以返回 invalid code

解决方法:

方法一:

在“开发者工具”的“详情”界面修改Appid

ef27910d6691eafdd5874f060d66475.png

方法二:

使用申请到的appid创建项目

59362da239a961b9852691c6b0f83ae.png

总结:

以上说明,小程序分发的code是与appid绑定的,仅当前申请code的appid才可使用

代码:

//前端 js
wx.login({
    success: function(res) {
        if (res.code) {
            console.log(res.code)
            wx.request({
                url: 'http://localhost:3000/login',
                data: {
                    code: res.code
                },
                success: function(res) {
                    console.log(res.data);
                },
                fail: function() {
                    console.log('login fail')
                    wx.redirectTo({
                        url: 'pages/login/login',
                    })
                }
            })
        }
    }
})
Copy after login

后端js:

//后端js:
//此处使用的request 是使用了 npm 的 request packet
app.get('/login', function(req, res) {
    console.log(req.query.code);
    var code = req.query.code;
    var url = 'https://api.weixin.qq.com/sns/jscode2session?' +
        'appid=' + '{{your appid}}&' +
        'secret=' + '{{your secret key}}&' +
        'js_code=' + code +
        '&grant_type=' + 'authorization_code';
    console.log(url);
    request({
            url: url
        },
        function(err, response, body) {
            if (!err) {
                // console.log(body);
                console.log(body);
                res.end(body)
            } else {
                console.log(err);
            }
        })
})
Copy after login

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