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  • Book Overview & Buying Learning Python Networking
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Learning Python Networking

Learning Python Networking

By : Dr. M. O. Faruque Sarker, Samuel B Washington, Sam Washington
3.7 (7)
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Learning Python Networking

Learning Python Networking

3.7 (7)
By: Dr. M. O. Faruque Sarker, Samuel B Washington, Sam Washington
Buy this Book

Overview of this book

If you're a Python developer or a system administrator with Python experience and you're looking to take your first steps in network programming, then this book is for you. Basic knowledge of Python is assumed.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Network Programming and Python
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1. Network Programming and Python
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An introduction to TCP/IP networks
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Network programming with Python
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Breaking a few eggs
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Summary
2
2. HTTP and Working with the Web
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2. HTTP and Working with the Web
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Request and response
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Requests with urllib
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Response objects
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Status codes
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Handling problems
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HTTP headers
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Customizing requests
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Content negotiation
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User agents
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Cookies
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Redirects
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URLs
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HTTP methods
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Formal inspection
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HTTPS
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The Requests library
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Summary
3
3. APIs in Action
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3. APIs in Action
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Getting started with XML
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The Amazon S3 API
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JSON
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The Twitter API
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HTML and screen scraping
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With great power...
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Summary
4
4. Engaging with E-mails
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4. Engaging with E-mails
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E-mail terminologies
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Sending e-mails with SMTP
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Sending e-mails securely with TLS
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Retrieving e-mails by using POP3 with poplib
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Retrieving e-mails by using IMAP with imaplib
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Sending e-mail attachments
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Sending e-mails via the logging module
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Summary
5
5. Interacting with Remote Systems
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5. Interacting with Remote Systems
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Secure shell – access using Python
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Transferring files through SFTP
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Transferring files with FTP
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Fetching Simple Network Management Protocol data
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Reading Light-weight Directory Access Protocol data
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Sharing files with SAMBA
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Summary
6
6. IP and DNS
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6. IP and DNS
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Retrieving the network configuration of a local machine
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Manipulating IP addresses
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GeoIP look-ups
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NTP clients
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Summary
7
7. Programming with Sockets
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7. Programming with Sockets
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Basics of sockets
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Working with TCP sockets
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Working with UDP sockets
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TCP port forwarding
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A non-blocking socket I/O
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Securing sockets with TLS/SSL
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Creating a custom SSL client/server
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Summary
8
8. Client and Server Applications
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8. Client and Server Applications
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Client and server
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An echo protocol
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A simple echo server
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A simple echo client
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Concurrent I/O
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Multithreading and multiprocessing
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A multithreaded echo server
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Designing a chat server
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A chat protocol
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Handling data on persistent connections
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A multithreaded chat server
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A multithreaded chat client
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Event-driven servers
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A low-level event-driven chat server
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Frameworks
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An eventlet-based chat server
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An asyncio-based chat server
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More on frameworks
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Taking our servers forward
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Summary
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9. Applications for the Web
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9. Applications for the Web
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What's in a web server?
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Python and the Web
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Flask – a microframework
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Hosting Python web applications
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Hosting in practice
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Summary
10
A. Working with Wireshark
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A. Working with Wireshark
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Packet sniffers
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Wireshark
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Index
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Index

A low-level event-driven chat server

So the event-driven architecture has a few great benefits, the catch is that for a low-level implementation, we need to write our code in a completely different style. Let's write an event-driven chat server to illustrate this.

Note that this example will not at all work on Windows as Windows lacks the poll interface which we will be employing here. There is an older interface, called select, which Windows does support, however it is slower and more complicated to work with. The event-driven frameworks that we look at later do automatically switch to select for us though, if we're running on Windows.

There is a higher performance alternative to poll called epoll, available on Linux operating systems, however it also more complicated to use, so for simplicity we'll stick with poll here. Again, the frameworks we discuss later automatically take advantage of epoll if it is available.

Finally, counter-intuitively, Python's poll interface lives in a module called...

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