var request=require("request") ; var cheerio = require('cheerio') ; var fs=require('fs'); var list=[] ; request('https://github.com/sass/node-sass/releases/tag/v4.6.0',function(err,rqs,body) { if(!err) { console.log('获取到数据==='); $ = cheerio.load(body);//当前body 前端选择器 var aDom = $('.release-downloads').find('li a'); aDom.map(function(item,v){ var l=v.attribs.href.split('/').length-1; var a={ url:'https://github.com'+v.attribs.href, title:v.attribs.href.split('/')[l] } list.push(a) ; }) console.log(list.length); // for (var i = 0 ; i < list.length; i++) { ( function (i) { console.log('开始下载===',list[i].url); downloadFile(list[i].url,list[i].title,function (data) { console.log("下载完成",i) }) })(i); } } } ) function downloadFile(uri,filename,callback){ var stream = fs.createWriteStream(filename); request(uri).pipe(stream).on('close', callback); }
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