使用Promise封装request请求

手动封装

• 只需创建一个Promise对象，调用它的resolve()和reject()以及then()方法，then()里面也可以写箭头函数；

function verifyIdCard(idCardOptions) {
    let options = {
        // url: config.idCardKey.idCardHost + '?idCard=' + idCardOptions.idCard + '&name=' + idCardOptions.name,
        url: 'https://idcert.market.alicloudapi.com/idcard',
        method: 'GET', 
        qs: {
            idCard: idCardOptions.idCard,
            name: idCardOptions.name
        },
        headers: { 
            'cache-control': 'no-cache',
            Authorization: 'APPCODE ' + config.idCardKey.idCardAppCode,
            'Content-Type': 'application/json'
        },
        json: true
    };

    console.info(options)
    return new Promise((resolve, reject) => {
        request(options, (error, response, body) => {
            if (!error && (response.statusCode === 200 || response.statusCode === 304)) {
                let IdCardInfo = {
                    reqInfo: idCardOptions,
                    resInfo: body
                }
                console.info(IdCardInfo)
                let idCardModel = new IdCardModel(IdCardInfo);
                idCardModel.save();
                resolve(body);
            } else {
                reject(error);
            }
        })
    })
}

或者安装使用request-promise模块

• 网址：https://github.com/request/request-promise

npm install --save request
npm install --save request-promise
 
var rp = require('request-promise');
 
rp('http://www.google.com')
    .then(function (htmlString) {
        // Process html...
    })
    .catch(function (err) {
        // Crawling failed...
    });