node.js计算字符串或者文件的md5校验值

计算字符串的md5值，代码如下:

var crypto = require('crypto');

var h = crypto.createHash('md5');

h.update("A string");
h.update("Next string");

var ret = h.digest('hex'); //'11eb1cc525474f34a4eaf2ebc90d421f'

var crypto = require('crypto');

var h = crypto.createHash('md5');

h.update("A string");

h.update("Next string");

var ret = h.digest('hex'); //'11eb1cc525474f34a4eaf2ebc90d421f'

很多时候，我们还需要计算文件的md5值，代码如下:

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

var rs = fs.createReadStream('./file.zip');

var hash = crypto.createHash('md5');
rs.on('data', hash.update.bind(hash));

rs.on('end', function () {
  console.log(hash.digest('hex'));
});

var crypto = require('crypto');

var fs = require('fs');

var rs = fs.createReadStream('./file.zip');

var hash = crypto.createHash('md5');

rs.on('data', hash.update.bind(hash));

rs.on('end', function () {

console.log(hash.digest('hex'));

});

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node.js计算字符串或者文件的md5校验值