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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)
Buy this Book
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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
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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

An asyncio-based chat server

The asyncio Standard Library module is new in Python 3.4 and it is an effort at bringing some standardization around asynchronous I/O into the Standard Library. The asyncio library uses a co-routine based style of programming. It provides a powerful loop class, which our programs can submit prepared tasks, called co-routines, to, for asynchronous execution. The event loop handles the scheduling of the tasks and optimization of performance around blocking I/O calls.

It has built-in support for socket-based networking, which makes building a basic server a straightforward task. Let's see how this can be done. Create a new file called 5.1-chat_server-asyncio.py and save the following code in it:

import asyncio
import tincanchat

HOST = tincanchat.HOST
PORT = tincanchat.PORT
clients = []

class ChatServerProtocol(asyncio.Protocol):
  """ Each instance of class represents a client and the socket 
       connection to it. """

    def connection_made(self, transport...

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