node.js的base64编解码

使用buffer编解码：>vara=newBuffer('key1=value1&key2=value2').toString('base64');undefined>a'a2V5MT12YWx1ZTEma2V5Mj12YWx1ZTI='>newBuffer(a,'base64').toString()'key1=value1&key2=value2'可以在终端执行如下命令查看解码后的内容：echoa2V5MT12YWx1ZTEma2V5Mj12YWx1ZTI=|base64-D