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ASP.NET

for (int i=0; i < cookies.length; i++) {

if (cookies[i].getName().equals(name)) {

return cookies[i];

}

} else {

return null;

}

When this code is inserted into a JSP, you can retrieve the value of a cookie by doing the following:

Cookie nameCookie = getCookie(request, “name”);

System.out.println(“Name is “ + nameCookie.getValue());

Creating a cookie is equally easy in the JSP world. To create a new cookie, simply instantiate a new

object and pass in the name and value. Then, add it to the user ’s system by using the

addCookie()

method of the response object:

Cookie nameCookie = new Cookie(“name”, “Nicholas”);

response.addCookie(nameCookie);

Alternately, you can add additional data to the cookie before storing it:

Cookie nameCookie = new Cookie(“name”, “Nicholas”);

nameCookie.setDomain(“http://www.wrox.com”);

nameCookie.setPath(“/books”);

response.addCookie(nameCookie);

To delete a specific cookie, you must first retrieve it and then set its expiration to

(JSP cookies use the

number of milliseconds as the expiration value):

Cookie cookieToDelete = getCookie(“name”);

cookieToDelete.setMaxAge(0);

response.addCookie(cookieToDelete);

ASP.NET

ASP.NET handles cookies in a very similar way to JSP. The

Request

object (automatically created for

each ASP.NET page) contains a

collection from which all cookies can be read. Each cookie is an

instance of

HttpCookie

, which has the following properties:

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