Implementing cookie for page redirect

Problem :

 

I have a requirement for the below scenario where I have to implement this using the browser cookies. This should be done using plain Html or Asp code.

 

E.g..  1 > User access www.example.com

      2 > In the landing page of www.example.com user will have another link for www.xyz.com.

      3 > User access the link in step 2.

      4 > User closes the browser.

      5 > Next time when the user access www.example.com  the user should be redirected to www.xyz.com directly.

 

 

Solution : @http://javascript.internet.com/cookies/cookie-redirect.html:

 

Create a javascript file ‘cookieRedirect.js’ with following code

 

var expDays = 30;

var exp = new Date();

exp.setTime(exp.getTime() + (expDays*24*60*60*1000));

 

function getCookieVal (offset) {

var endstr = document.cookie.indexOf (";", offset);

if (endstr == -1)

endstr = document.cookie.length;

return unescape(document.cookie.substring(offset, endstr));

}

function GetCookie (name) {

var arg = name + "=";

var alen = arg.length;

var clen = document.cookie.length;

var i = 0;

while (i < clen) {

var j = i + alen;

if (document.cookie.substring(i, j) == arg)

return getCookieVal (j);

i = document.cookie.indexOf(" ", i) + 1;

if (i == 0) break;

}

return null;

}

function SetCookie (name, value) {

var argv = SetCookie.arguments;

var argc = SetCookie.arguments.length;

var expires = (argc > 2) ? argv[2] : null;

var path = (argc > 3) ? argv[3] : null;

var domain = (argc > 4) ? argv[4] : null;

var secure = (argc > 5) ? argv[5] : false;

document.cookie = name + "=" + escape (value) +

((expires == null) ? "" : ("; expires=" + expires.toGMTString())) +

((path == null) ? "" : ("; path=" + path)) +

((domain == null) ? "" : ("; domain=" + domain)) +

((secure == true) ? "; secure" : "");

}

function DeleteCookie (name) {

var exp = new Date();

exp.setTime (exp.getTime() - 1);

var cval = GetCookie (name);

document.cookie = name + "=" + cval + "; expires=" + exp.toGMTString();

}

 

var favorite = GetCookie('animal');

 

if (favorite != null) {

switch (favorite) {

case 'cat' :     url = 'cat.html'; // change these!

                 break;

case 'dog' :     url = 'dog.html';

                 break;

case 'gerbil' : url = 'gerbil.html';

                break;

case 'gopher' : url = 'gopher.html';

                break;

}

// window.location.href = url;

alert('You would have been taken to the ' + favorite + ' page (' + url + '), but this is just a demo!');

}

 

 

 

Add following lines to page HEAD

 

<script type="text/javascript" src="cookieRedirect.js"></script>

 

 

Add following lines to page Body

 

<form>

<table><tr><td>

Please choose your Favorite Pet:<br>

<input type=checkbox name="cat" onClick="SetCookie('animal', this.name, exp);">Cat<br>

<input type=checkbox name="dog" onClick="SetCookie('animal', this.name, exp);">Dog<br>

<input type=checkbox name="gerbil" onClick="SetCookie('animal', this.name, exp);">Gerbil<br>

<input type=checkbox name="gopher" onClick="SetCookie('animal', this.name, exp);">Gopher<br>

</td></tr>

</table>

</form>

<br>

(Choose an animal then <a href="cookie-redirect.html">reload</a> the page to see how the redirect works.)