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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
Free Chapter
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
11
Index
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Index

A multithreaded chat server

So let's put this to use and write our chat server. Make a new file called 2.1-chat_server-multithread.py and put the following code in it:

import threading, queue
import tincanchat

HOST = tincanchat.HOST
PORT = tincanchat.PORT

send_queues = {}
lock = threading.Lock()

def handle_client_recv(sock, addr):
    """ Receive messages from client and broadcast them to
        other clients until client disconnects """
    rest = bytes()
    while True:
        try:
            (msgs, rest) = tincanchat.recv_msgs(sock, rest)
        except (EOFError, ConnectionError):
            handle_disconnect(sock, addr)
            break
        for msg in msgs:
            msg = '{}: {}'.format(addr, msg)
            print(msg)
            broadcast_msg(msg)

def handle_client_send(sock, q, addr):
    """ Monitor queue for new messages, send them to client as
        they arrive """
    while True:
        msg = q.get()
        if msg == None: break
        try:
            tincanchat...

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