企业微信侧边栏功能/微信企业授权

/**
 * @description node程序，企业微信授权/应用授权
 */
let express = require(‘express‘);
let app = express();
var axios = require(‘axios‘);

let base = {
    corpid: ‘xxx‘, // 必填，企业微信的corpid，必须与当前登录的企业一致
    agentid: ‘1000247‘, // 必填，企业微信的应用id （e.g. 1000247）
    secret: ‘xxxxx‘, // 测试应用1000247的密码
    timestamp: ‘xxxxxx‘, // 必填，生成签名的时间戳
    nonceStr: ‘xxxxxx‘ // 必填，生成签名的随机串
}

/**
 * @description 通过企业id和应用密码获取企业应用最新的token和ticket
 * 函数内部有token和ticket的缓存，自动根据情况获取缓存还是重新请求
 * @param {String} corpid 企业id
 * @param {String} corpsecret 应用密码
 * @param {Boolean} isApp  是否是应用， 默认false
 *@return {Object} tokenAndTicket 返回最新有效token和ticket
 * tokenAndTicket.access_token  token
 * tokenAndTicket.ticket   wxTicket:企业ticket   appTicket:应用ticket
 */
const getAccessTokenAndTicket = function(corpid, corpsecret, isApp) {
    getAccessTokenAndTicket[corpid] = getAccessTokenAndTicket[corpid] || {};
    return new Promise((resolve, reject) => {
        // 引用的token已经过期 则需要重新获取
        // 每一个应用的corpsecret不同，此处把corpsecret作为一个应用的唯一标志
        // 初始化时默认应用的token是过期的，以便获取新token
        if (!getAccessTokenAndTicket[corpid][corpsecret]) {
            getAccessTokenAndTicket[corpid][corpsecret] = {
                tokenExpired: true,
                wxTicketExpired: true, // 企业ticket
                appTicketExpired: true // 应用ticket
            };
        }
        let appInfo = getAccessTokenAndTicket[corpid][corpsecret];
        // 获取企业ticket的函数
        const getWxTicket = function(ACCESS_TOKEN) {
            return new Promise((resl, reje) => {
                if (!appInfo.wxTicketExpired) { // ticket未过期直接用
                    resl(appInfo.wxTicket);
                } else { // 已过期重新获取
                    axios.get(`https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=${ACCESS_TOKEN}`)
                        .then(res => {
                            let data = res.data;
                            appInfo.wxTicket = data.ticket;
                            appInfo.wxTicketExpired = false;
                            // 有效期倒计时，刷新ticket过期状态
                            setTimeout(() => {
                                appInfo.wxTicketExpired = true;
                            }, data.expires_in * 1000);

                            resl(appInfo.wxTicket);
                        })
                        .catch(err => {
                            reje(err);
                        })
                }
            })
        };

        // 获取应用的ticket的函数
        const getAppTicket = function(ACCESS_TOKEN) {
            return new Promise((resl, reje) => {
                if (!appInfo.appTicketExpired) { // ticket未过期直接用
                    resl(appInfo.appTicket);
                } else { // 已过期重新获取
                    axios.get(`https://qyapi.weixin.qq.com/cgi-bin/ticket/get?access_token=${ACCESS_TOKEN}&type=agent_config`)
                        .then(res => {
                            let data = res.data;
                            appInfo.appTicket = data.ticket;
                            appInfo.appTicketExpired = false;
                            // 有效期倒计时，刷新ticket过期状态
                            setTimeout(() => {
                                appInfo.appTicketExpired = true;
                            }, data.expires_in * 1000);

                            resl(appInfo.appTicket);
                        })
                        .catch(err => {
                            reje(err);
                        })
                }
            })
        };

        // 获取token的函数，内部试用是统一的
        const getToken = function(CORPID, CORPSECRET) {
            return new Promise((resl, reje) => {
                if (!appInfo.tokenExpired) { // token未过期直接用
                    resl(appInfo.access_token);
                } else { // 已过期重新获取
                    axios.get(`https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=${CORPID}&corpsecret=${CORPSECRET}`)
                        .then(res => {
                            let data = res.data;

                            appInfo.access_token = data.access_token;
                            appInfo.tokenExpired = false;
                            // 有效期倒计时，刷新token过期状态
                            setTimeout(() => {
                                appInfo.tokenExpired = true;
                            }, data.expires_in * 1000);

                            resl(appInfo.access_token);
                        })
                        .catch(err => {
                            reje(err);
                        })
                }
            })
        }

        getToken(corpid, corpsecret).then(_token => {
            let getTicket = isApp ? getAppTicket : getWxTicket;
            getTicket(_token).then(_ticket => {
                resolve({
                    access_token: _token,
                    ticket: _ticket
                })
            }).catch(err => {
                reject(err);
            })
        }).catch(err => {
            reject(err);
        })
    });
};

function encodeUTF8(s) {
    var i; var r = []; var c; var x;
    for (i = 0; i < s.length; i++) {
        if ((c = s.charCodeAt(i)) < 0x80) r.push(c);
        else if (c < 0x800) r.push(0xC0 + (c >> 6 & 0x1F), 0x80 + (c & 0x3F));
        else {
            if ((x = c ^ 0xD800) >> 10 == 0) // 对四字节UTF-16转换为Unicode
            {
                c = (x << 10) + (s.charCodeAt(++i) ^ 0xDC00) + 0x10000,
                    r.push(0xF0 + (c >> 18 & 0x7), 0x80 + (c >> 12 & 0x3F));
            } else r.push(0xE0 + (c >> 12 & 0xF));
            r.push(0x80 + (c >> 6 & 0x3F), 0x80 + (c & 0x3F));
        }
    };
    return r;
}

// 字符串加密成 hex 字符串
function sha1(s) {
    var data = new Uint8Array(encodeUTF8(s))
    var i, j, t;
    var l = ((data.length + 8) >>> 6 << 4) + 16; var s = new Uint8Array(l << 2);
    s.set(new Uint8Array(data.buffer)), s = new Uint32Array(s.buffer);
    for (t = new DataView(s.buffer), i = 0; i < l; i++)s[i] = t.getUint32(i << 2);
    s[data.length >> 2] |= 0x80 << (24 - (data.length & 3) * 8);
    s[l - 1] = data.length << 3;
    var w = []; var f = [
        function() { return m[1] & m[2] | ~m[1] & m[3]; },
        function() { return m[1] ^ m[2] ^ m[3]; },
        function() { return m[1] & m[2] | m[1] & m[3] | m[2] & m[3]; },
        function() { return m[1] ^ m[2] ^ m[3]; }
    ]; var rol = function(n, c) { return n << c | n >>> (32 - c); };
    var k = [1518500249, 1859775393, -1894007588, -899497514];
    var m = [1732584193, -271733879, null, null, -1009589776];
    m[2] = ~m[0], m[3] = ~m[1];
    for (i = 0; i < s.length; i += 16) {
        var o = m.slice(0);
        for (j = 0; j < 80; j++) {
            w[j] = j < 16 ? s[i + j] : rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1),
                t = rol(m[0], 5) + f[j / 20 | 0]() + m[4] + w[j] + k[j / 20 | 0] | 0,
                m[1] = rol(m[1], 30), m.pop(), m.unshift(t);
        }
        for (j = 0; j < 5; j++)m[j] = m[j] + o[j] | 0;
    };
    t = new DataView(new Uint32Array(m).buffer);
    for (var i = 0; i < 5; i++)m[i] = t.getUint32(i << 2);

    var hex = Array.prototype.map.call(new Uint8Array(new Uint32Array(m).buffer), function(e) {
        return (e < 16 ? ‘0‘ : ‘‘) + e.toString(16);
    }).join(‘‘);
    return hex;
}

/** 企业微信授权签名
 *@param {String}  url 签名用的url
 *@return {Object} res 返回最新有效签名t
* res.data.signature  签名
 */
app.get(‘/wxapi/wxQyAuth‘, function(req, res) {
    getAccessTokenAndTicket(base.corpid, base.secret)
        .then(data => {
            let str = `jsapi_ticket=${data.ticket}&noncestr=${base.nonceStr}&timestamp=${base.timestamp}&url=${req.query.url}`;
            res.json({
                code: ‘0‘,
                data: {
                    signature: sha1(str)
                },
                message: ‘success‘
            });
        });
})

/** 企业应用微信授权签名
 *@param {String}  url 签名用的url
 *@return {Object} res 返回最新有效签名t
 * res.data.signature  签名
 */
app.get(‘/wxapi/wxAppAuth‘, function(req, res) {
    getAccessTokenAndTicket(base.corpid, base.secret, true)
        .then(data => {
            let str = `jsapi_ticket=${data.ticket}&noncestr=${base.nonceStr}&timestamp=${base.timestamp}&url=${req.query.url}`;
            res.json({
                code: ‘0‘,
                data: {
                    signature: sha1(str)
                },
                message: ‘success‘
            });
        });
})

var server = app.listen(8880, function() {
    var host = server.address().address
    var port = server.address().port
    console.log(‘应用实例，访问地址为 http://%s:%s‘, host, port)
})