计算文件md5

fileMd5.js

let fs = require('fs');
let crypto = require('crypto');

let path = '/Users/lushijie/Pictures/day1.jpg';
let start = new Date().getTime();
let md5sum = crypto.createHash('md5');
let stream = fs.createReadStream(path);
stream.on('data', function(chunk) {
    md5sum.update(chunk);
});
stream.on('end', function() {
    str = md5sum.digest('hex').toUpperCase();
    console.log('文件:'+path+',MD5签名为:'+str+'.耗时:'+(new Date().getTime()-start)/1000.00+"秒");
});