NodeJS 复制大文件防治包内存的解决办法

var fs = require('fs');var rs = fs.createReadStream(src);var ws = fs.createWriteStream(dst);rs.on('data',function(chunk){if(ws.write(chunk) === false) {     //ws.write()  判断数据流是否已经写入目标了rs.pause();}});rs.on('end',function(){ws.end();});ws.on('drain',function(){rs.resume();   //从新启动读取数据流});