【移動應(yīng)用開發(fā)技術(shù)】微信小程序獲取用戶session_key、openid、unioni的方法

這篇文章主要介紹了微信小程序獲取用戶session_key、openid、unioni的方法，具有一定借鑒價值，需要的朋友可以參考下。希望大家閱讀完這篇文章后大有收獲。下面讓在下帶著大家一起了解一下。node.js的微信小程序獲取用戶session_key,openid,unionid的方法實現(xiàn)。步驟：1、通過wx.login接口獲取code既jscode，傳遞到后端；2、后端請求/sns/jscode2session?appid=APPID&secret=SECRET&js_code=JSCODE&grant_type=authorization_code地址，就能獲取到openid和unionid。小程序接口promise化和封裝1、utils文件夾下創(chuàng)建wechat.js文件/**

*

Promise化小程序接口

*/

class

Wechat

{

/**

*

登陸

*

@return

{Promise}

*/

static

login()

{

return

new

Promise((resolve,

reject)

=>

wx.login({

success:

resolve,

fail:

reject

}));

};

/**

*

獲取用戶信息

*

@return

{Promise}

*/

static

getUserInfo()

{

return

new

Promise((resolve,

reject)

=>

wx.getUserInfo({

success:

resolve,

fail:

reject

}));

};

/**

*

發(fā)起網(wǎng)絡(luò)請求

*

@param

{string}

url

*

@param

{object}

params

*

@return

{Promise}

*/

static

request(url,

params,

method

=

"GET",

type

=

"json")

{

console.log("向后端傳遞的參數(shù)",

params);

return

new

Promise((resolve,

reject)

=>

{

let

opts

=

{

url:

url,

data:

Object.assign({},

params),

method:

method,

header:

{

'Content-Type':

type

},

success:

resolve,

fail:

reject

}

console.log("請求的URL",

opts.url);

wx.request(opts);

});

};

/**

*

獲取微信數(shù)據(jù),傳遞給后端

*/

static

getCryptoData()

{

let

code

=

"";

return

this.login()

.then(data

=>

{

code

=

data.code;

console.log("login接口獲取的code:",

code);

return

this.getUserInfo();

})

.then(data

=>

{

console.log("getUserInfo接口",

data);

let

obj

=

{

js_code:

code,

};

return

Promise.resolve(obj);

})

.catch(e

=>

{

console.log(e);

return

Promise.reject(e);

})

};

/**

*

從后端獲取openid

*

@param

{object}

params

*/

static

getMyOpenid(params)

{

let

url

=

'/api/openid';

return

this.request(url,

params,

"POST",

"application/x-www-form-urlencoded");

};

}

module.exports

=

Wechat;2、修改小程序的app.js文件let

wechat

=

require('./utils/wechat.js');

App({

onLaunch()

{

this.getUserInfo();

},

getUserInfo()

{

wechat.getCryptoData()

.then(d

=>

{

return

wechat.getMyOpenid(d);

})

.then(d

=>

{

console.log("從后端獲取的openid",

d.data);

})

.catch(e

=>

{

console.log(e);

})

}

})后端nodejs，是用的express命令行生成的項目框架，1、創(chuàng)建common文件夾，創(chuàng)建utils文件，使用request模塊請求接口，promise化requestconst

request

=

require("request");

class

Ut

{

/**

*

promise化request

*

@param

{object}

opts

*

@return

{Promise<[]>}

*/

static

promiseReq(opts

=

{})

{

return

new

Promise((resolve,

reject)

=>

{

request(opts,

(e,

r,

d)

=>

{

if

(e)

{

return

reject(e);

}

if

(r.statusCode

!=

200)

{

return

reject(`back

statusCode：${r.statusCode}`);

}

return

resolve(d);

});

})

};

};

module.exports

=

Ut;2、新增路由，appId、secret在小程序的后臺獲取router.post("/openid",

async

(req,

res)

=>

{

const

Ut

=

require("../common/utils");

try

{

console.log(req.body);

let

appId

=

"wx70xxxxxxbed01b";

let

secret

=

"5ec6exxxxxx49bf161a79dd4";

let

{

js_code

}

=

req.body;

let

opts

=

{

url:

`/sns/jscode2session?appid=${appId}&secret=${secret}&js_code=${js_code}&grant_type=authorization_code`

}

let

r1

=

await

UmiseReq