html-email-obfuscator for Node.js

This module combines some Email obfuscation technics.

• The @ char is removed and only its index is passed on. It will be reinserted using the expression String.fromCharCode(422*4).
• The address itself will be transmitted as a ROT13 transformed string which will be retransformed by Javascript.

Installation

npm install --save @fischerpascal/html-email-obfuscator

Usage

The Email address "[email protected]" will result in the following string:

var emailObfuscator = require('@fischerpascal/html-email-obfuscator');

// Obfuscate and encode as HTML <script>
var htmlScript = emailObfuscator.asHtmlScript('[email protected]');
// htmlScript = See below

// Obfuscate and return as string
var obfuscated = emailObfuscator.obfuscate('[email protected]');
// obfuscated = 'znvyrknzcyr.pbz/4'
var original = emailObfuscator.unobfuscate(obfuscated);
// original = '[email protected]'

// Find, obfuscate and encode emails in HTML-Strings
// This function use emailObfuscator.asHtmlScript();
var obfuscated_html_string = emailObfuscator.obfuscateEMailsInHtml("<p>My Mail is [email protected]</p>");
// obfuscated_html_string = '<p>My Mail is <script>…</script></p>' // See below

asHtmlScript output which can be included instead of the email address:

<script type="text/javascript">
var action=":otliam".split("").reverse().join("");
var href="znvyrknzcyr.pbz".replace(/[a-zA-Z]/g, function(c){return String.fromCharCode((c<="Z"?90:122)>=(c=c.charCodeAt(0)+13)?c:c-26);});
href=href.substr(0, 4) + String.fromCharCode(4*2*2*4) + href.substr(4);
var a = "<a href=\""+action+href+"\">"+href+"</a>";
document.write(a);
</script>