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Learning Python Networking

You're reading from   Learning Python Networking Utilize Python 3 to get network applications up and running quickly and easily

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Product type Paperback
Published in Jun 2015
Publisher
ISBN-13 9781784396008
Length 320 pages
Edition 1st Edition
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Toc

Table of Contents (12) Chapters Close

Preface 1. Network Programming and Python 2. HTTP and Working with the Web FREE CHAPTER 3. APIs in Action 4. Engaging with E-mails 5. Interacting with Remote Systems 6. IP and DNS 7. Programming with Sockets 8. Client and Server Applications 9. Applications for the Web A. Working with Wireshark Index

Cookies


A cookie is a small piece of data that the server sends in a Set-Cookie header as a part of the response. The client stores cookies locally and includes them in any future requests that are sent to the server.

Servers use cookies in various ways. They can add a unique ID to them, which enables them to track a client as it accesses different areas of a site. They can store a login token, which will automatically log the client in, even if the client leaves the site and then accesses it later. They can also be used for storing the client's user preferences or snippets of personalizing information, and so on.

Cookies are necessary because the server has no other way of tracking a client between requests. HTTP is called a stateless protocol. It doesn't contain an explicit mechanism for a server to know for sure that two requests have come from the same client. Without cookies to allow the server to add some uniquely identifying information to the requests, things such as shopping carts...

You have been reading a chapter from
Learning Python Networking
Published in: Jun 2015
Publisher:
ISBN-13: 9781784396008
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