Customized SearchEngines.java

The SearchEnginesFrontEnd servlet shown above sends its data to the CustomizedSearchEngines servlet.

SearchEngines FrontEnd.java

This servlet builds the form-based front end to the search engine servlet.

LongLivedCookie.java

(Download source code)

Here’s a small class that you can use instead of Cookie

Getting the Value of a Cookie with a Specified Name

Here’s a section of ServletUtilities.java that slightly simplifies the retrieval of a cookie

Reading Cookies from the Client

To send cookies to the client, you created a Cookie then used addCookie to send a Set-Cookie HTTP response header

Placing Cookies in the Response Headers

The cookie is added to the Set-Cookie response header

Reading and Specifying Cookie Attributes

Before adding the cookie to the outgoing headers, you can look up or set attributes of the cookie. Here’s a summary:

Creating Cookies

A Cookie is created by calling the Cookie constructor, which takes two strings:

The Servlet Cookie API

To send cookies to the client, a servlet would create one or more cookies with the appropriate names and values via

Overview of Cookies

Cookies are small bits of textual information that a Web server sends to a browser and that the browser returns unchanged when visiting the same Web site or domain later.