1. HTTP and Cookies February 26, 2003 Kyle Miyamoto Dawn Namahoe Daniel Young Wendi Young

2. Table of Contents Definition Slide Definition Slide Overview of HTTP Overview of HTTP Chart Chart Stateless Protocol Stateless Protocol Cookies as a Way of Maintaining State Cookies as a Way of Maintaining State Example of Cookies Example of Cookies Other Useful facts Other Useful facts Summary Slide Summary Slide Citations Citations

3. Definitions HTTP (Hypertext Transfer Protocol) – Protocol used to transfer files over the internet to the web browser from a web server. HTTP (Hypertext Transfer Protocol) – Protocol used to transfer files over the internet to the web browser from a web server. Cookies – A small text file sent from web server to browser computer and from browser computer back to the web server. Cookies – A small text file sent from web server to browser computer and from browser computer back to the web server. State – Identification of a user and the memory of user information. State – Identification of a user and the memory of user information. Stateless – Not needing any specific user information. Stateless – Not needing any specific user information. Server – A program that connects and processes requests made over the internet. Server – A program that connects and processes requests made over the internet. Browser – A program used to access the internet. Browser – A program used to access the internet. Protocol – A specific way of communicating. Protocol – A specific way of communicating.

4. Overview of HTTP Most popular way of transmitting instructions between the user and the server. Most popular way of transmitting instructions between the user and the server. Very simple protocol to retrieve information on the internet. Very simple protocol to retrieve information on the internet.

5. How HTTP Works

6. Stateless Protocol HTTP is a stateless protocol. HTTP is a stateless protocol. No information needed or kept. No information needed or kept. Each command is executed independently. Each command is executed independently. No knowledge of commands that came before application. No knowledge of commands that came before application. Information easily retransmitted. Information easily retransmitted. Website kept simple and light. Website kept simple and light.

7. Cookies Maintaining State Reflects personal settings and configurations. Reflects personal settings and configurations. Each website has its own cookie that is site-specific. Each website has its own cookie that is site-specific.

8. Example of Cookies

9. Other Useful Facts Newer cookies will overwrite older cookies. Newer cookies will overwrite older cookies. There are set restrictions on the number of cookies that can be stored. There are set restrictions on the number of cookies that can be stored.

10. Summary HTTP & Cookies February 26, 2003 Kyle Miyamoto Dawn Namahoe Daniel Young Wendi Young HTTP is a stateless protocol. Every command is executed independently. Cookies are a way of maintaining state. They represent personal settings. There are settings on your computer to limit the number of cookies allowed.

11. Citations http://www.cherrymedia.com/webservices/supgloss ary.html http://www.cherrymedia.com/webservices/supgloss ary.html http://www.cherrymedia.com/webservices/supgloss ary.html http://www.cherrymedia.com/webservices/supgloss ary.html http://computer.howstuffworks.com/cookie3.htm http://computer.howstuffworks.com/cookie3.htm http://computer.howstuffworks.com/cookie3.htm http://www.cookiecentral.com/faq/#1.1 http://www.cookiecentral.com/faq/#1.1 http://www.cookiecentral.com/faq/#1.1 http://www.faqs.org/rfcs/rfc2616.html http://www.faqs.org/rfcs/rfc2616.html http://www.faqs.org/rfcs/rfc2616.html http://webopedia.internet.com/TERM/P/protocol.ht ml http://webopedia.internet.com/TERM/P/protocol.ht ml http://webopedia.internet.com/TERM/P/protocol.ht ml http://webopedia.internet.com/TERM/P/protocol.ht ml http://webopedia.internet.com/TERM/B/browser.ht ml http://webopedia.internet.com/TERM/B/browser.ht ml http://webopedia.internet.com/TERM/B/browser.ht ml http://webopedia.internet.com/TERM/B/browser.ht ml