router.get(‘/download/qiantu‘,function(req,res){
	var dirname = (new Date()).getTime()
	var zippath = ‘./down/‘+dirname+‘.zip‘
	
	var output = fs.createWriteStream(zippath)
	var ziparchiver = archiver(‘zip‘,{
		store:true
	})
	ziparchiver.pipe(output)
	async.mapSeries(req.session.qtimagesurl,function(item, callback){//异步下载
    	setTimeout(function(){
        	//downloadPic(item, dir+‘/‘+ (new Date()).getTime() +‘.jpg‘);
        	ziparchiver.append(request(item),{‘name‘:‘images/‘+(new Date()).getTime() +‘.jpg‘})
       		callback(null, item);
    	},400);
	}, function(err, results){
		req.session.qtimagesurl =[] //下载完成后清空
		ziparchiver.finalize()
		res.render(‘index‘)
	});
})