##Hash a string, local file or content served by http/https url.

Installation:

$ npm install hashk

How to use:

note that default hashing algorithm is sha256 and default encoding is hex

use of asyncFileHash:

asyncFileHash takes local file path, an optional option and a callback. It will return hash of that file

const hashk=require('hashk');
hashk.asyncFileHash('./abc.png',function(err,data){
   // data is sha256 hash of file abc.png 
});

// Example 2
var option = {algorithm:'md5',encoding:'base64'}
hashk.asyncFileHash('./abc.png',option, function(err,data){
   // data is md5 hash of file abc.png 
});

use of asyncUrlHash:

asyncUrlHash takes a http/https url, an optional option and a callback. It will return hash of the content of url

const hashk=require('hashk');
hashk.asyncFileHash('http://localhost/iamges/abc.png',function(err,data){
   // data is sha256 hash of abc.png 
});

// Example 2
var option = {algorithm:'md5',encoding:'base64'}
hashk.asyncFileHash('http://localhost/iamges/abc.png',option, function(err,data){
   // data is md5 hash of abc.png 
});

use of syncTextHash:

syncTextHash take a string and an optional option. It will return hash of that string. Note that this is synchronus function.

const hashk=require('hashk');
var ret=hashk.syncTextHash('abcdefghij');
// ret is sha256 hash os string abcdefghij

// Example 2
var option = {algorithm:'md5',encoding:'base64'}
var ret=hashk.syncTextHash('abcdefghij',option);
// ret is md5 hash os string abcdefghij