const https = require('https');

const fs = require("fs");

const path = require("path");

const username = 'dragon8github';

const download_list = ['linux-999'];

const src = __dirname + "/src/";

const ext =  ".zip";

fs.exists(src, function (exists) {

    if (!exists) {

        fs.mkdir(src, function (err) {

            if (err) throw new Error("创建src文件夹失败，请提升脚本的权限");

            console.log("检测到不存在src文件夹，已自动创建");

        })

    }

})

for (let [index, filename] of download_list.entries()) {

    var req = https.request(`https://codeload.github.com/${username}/${filename}/zip/master`, function (res) {

         var fileBuff = [];

         res.on('data', function (chunk) {

            var buffer = new Buffer(chunk);

            fileBuff.push(buffer);

         });

         res.on('end', function () {

            var totalBuff = Buffer.concat(fileBuff);

            fs.appendFile(src + filename + ext, totalBuff, function(err){

                if (err) throw new Error(filename + ": 下载出错");

                console.log(filename + ": 下载完成");

            });

         });

    });

    req.on('error', function(e) {

        console.log('problem with request: ' + e.message);

    });

    req.end();

}