Download E-books Python Network Programming Cookbook PDF

Over 70 special recipes to boost sensible strategies for quite a lot of realworld community programming tasks

About This Book

  • Demonstrates the right way to write numerous besopke client/server networking functions utilizing common and well known third-party Python libraries
  • Learn how you can improve patron courses for networking protocols akin to HTTP/HTTPS, SMTP, POP3, FTP, CGI, XML-RPC, cleaning soap and REST
  • Provides useful, hands-on recipes mixed with brief and concise reasons on code snippets

Who This e-book Is For

If you're a community programmer, system/network administrator, or an online program developer, this booklet is perfect for you. you'll have a simple familiarity with the Python programming language and TCP/IP networking techniques. in spite of the fact that while you are a beginner, you'll enhance an realizing of the suggestions as you move with this ebook. This e-book will function a supplementary fabric for constructing hands-on talents in any educational path on community programming.

What you are going to Learn

  • Develop TCP/IP networking client/server applications
  • Administer neighborhood machines' IPv4/IPv6 community interfaces
  • Write multi-purpose effective net consumers for HTTP and HTTPS protocols
  • Create email consumers to paintings with universal email protocols akin to SMTP, POP3, IMAP, and so on.
  • Scrape web content and look for priceless information
  • Perform distant process management projects over Telnet and SSH connections
  • Interact with well known web pages through internet companies equivalent to XML-RPC, cleaning soap, and leisure APIs
  • Monitor and research significant universal community protection vulnerabilities

In Detail

Python is a superb language to take advantage of to write down code and feature enjoyable via prototyping functions speedy. The presence of plenty of third-party libraries, sometimes called batteries, makes it much more more uncomplicated and quicker to prototype an program or to enforce a brand new set of rules. when you are drawn to growing the construction blocks for lots of functional net and networking functions that depend on networking protocols then this booklet is a must-have.

This booklet highlights significant elements of community programming in Python ranging from writing basic networking consumers, to constructing advanced screen-scraping and community safeguard tracking scripts. It creates the construction blocks for lots of sensible net and networking functions that depend on quite a few networking protocols. This booklet provides the ability and wonder of Python in fixing the varied real-world projects within the sector of community programming, method and community management, community tracking, and web-application improvement.

This e-book develops your skill to resolve quite a lot of community programming projects in Python. we'll begin through exploring the Python common library services to create client/server community and control your neighborhood networking assets on hand below either IPv4 and IPv6. the sensible concentration maintains with developing internet and electronic mail consumers, scraping websites, fetching details from a variety of web pages, and looking out for info on the net corresponding to Amazon, Flickr, and different websites. It extra develops your abilities to research your community safety vulnerabilities utilizing complex community packet seize and research techniques.

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It will probably run on the other model with/without ameliorations. import argparse LOCAL_SERVER_HOST = 'localhost' REMOTE_SERVER_HOST = 'www. google. com' BUFSIZE = 4096 import asyncore import socket fifty four Chapter three First, we outline the PortForwarder type: type PortForwarder(asyncore. dispatcher): def __init__(self, ip, port, remoteip,remoteport,backlog=5): asyncore. dispatcher. __init__(self) self. remoteip=remoteip self. remoteport=remoteport self. create_socket(socket. AF_INET,socket. SOCK_STREAM) self. set_reuse_addr() self. bind((ip,port)) self. listen(backlog) def handle_accept(self): conn, addr = self. accept() print "Connected to:",addr Sender(Receiver(conn),self. remoteip,self. remoteport) Now, we have to specify the Receiver and Sender sessions, as follows: type Receiver(asyncore. dispatcher): def __init__(self,conn): asyncore. dispatcher. __init__(self,conn) self. from_remote_buffer='' self. to_remote_buffer='' self. sender=None def handle_connect(self): move def handle_read(self): learn = self. recv(BUFSIZE) self. from_remote_buffer += learn def writable(self): go back (len(self. to_remote_buffer) > zero) def handle_write(self): despatched = self. send(self. to_remote_buffer) self. to_remote_buffer = self. to_remote_buffer[sent:] def handle_close(self): self. close() if self. sender: self. sender. close() type Sender(asyncore. dispatcher): def __init__(self, receiver, remoteaddr,remoteport): asyncore. dispatcher. __init__(self) self. receiver=receiver receiver. sender=self self. create_socket(socket. AF_INET, socket. SOCK_STREAM) self. connect((remoteaddr, remoteport)) fifty five IPv6, Unix area Sockets, and community Interfaces def handle_connect(self): go def handle_read(self): learn = self. recv(BUFSIZE) self. receiver. to_remote_buffer += learn def writable(self): go back (len(self. receiver. from_remote_buffer) > zero) def handle_write(self): despatched = self. send(self. receiver. from_remote_buffer) self. receiver. from_remote_buffer = self. receiver. from_remote_ buffer[sent:] def handle_close(self): self. close() self. receiver. close() if __name__ == "__main__": parser = argparse. ArgumentParser(description='Port forwarding example') parser. add_argument('--local-host', action="store", dest="local_ host", default=LOCAL_SERVER_HOST) parser. add_argument('--local-port', action="store", dest="local_ port", type=int, required=True) parser. add_argument('--remote-host', action="store", dest="remote_ host", default=REMOTE_SERVER_HOST) parser. add_argument('--remote-port', action="store", dest="remote_ port", type=int, default=80) given_args = parser. parse_args() local_host, remote_host = given_args. local_host, given_args. remote_host local_port, remote_port = given_args. local_port, given_args. remote_port print "Starting port forwarding neighborhood %s:%s => distant %s:%s" % (local_host, local_port, remote_host, remote_port) PortForwarder(local_host, local_port, remote_host, remote_port) asyncore. loop() for those who run this script, it is going to exhibit the subsequent output: $ python 3_1_port_forwarding. py --local-port=8800 beginning port forwarding neighborhood localhost:8800 => distant www.

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