By John Goerzen, Tim Bower, Brandon Rhodes
This moment variation of Foundations of Python community Programming goals Python 2.5 via Python 2.7, the most well-liked creation models of the language. Python has made nice strides because Apress published the 1st variation of this e-book again within the days of Python 2.3. The advances required new chapters to be written from the floor up, and others to be generally revised. you are going to research basics like IP, TCP, DNS and SSL through the use of operating Python courses; additionally, you will be capable of make yourself familiar with infrastructure elements like memcached and message queues. you may also delve into community server designs, and examine threaded methods with asynchronous event-based ideas. however the greatest switch is that this edition's improved remedy of the internet. The HTTP protocol is roofed in broad element, with each one characteristic followed through pattern Python code. you should use your HTTP protocol services via learning a whole bankruptcy on display scraping and you may then attempt lxml and BeautifulSoup opposed to a real-world site. The bankruptcy on net software programming now covers either the WSGI usual for part interoperability, in addition to sleek net frameworks like Django. ultimately, the entire previous favorites from the 1st variation are again: email protocols like SMTP, POP, and IMAP get complete remedy, as does XML-RPC. it is easy to easy methods to code Python community courses utilizing the Telnet and FTP protocols, yet you will definitely take pleasure in the ability of extra sleek possible choices just like the paramiko SSH2 library. while you are a Python programmer who must study the community, this can be the e-book that you really want by way of your part.
What you’ll learn
- Understand low point networking
- Handle sending and receiving e mail together with composing and interpreting emails, SMTP, POP and IMAP
- Program the decrease degrees of net program programming similar to FastCGI and WSGI and HTTP itself
- Learn the way to use memcached and message qeues utilizing Python
- Access internet prone utilizing Python
- Master multitasking with threads, forking, and asynchronous conversation
Who this booklet is for
This ebook can be of curiosity to python programmers who have to application networked purposes utilizing Python. From net program builders, to platforms integrators, to procedure administrators—this publication has every thing you want to understand.
Table of Contents
- Introduction to Client/Server Networking
- Socket Names and DNS
- Network information and community mistakes
- TLS and SSL
- Server structure
- Caches, Message Queues, and Map-Reduce
- Screen Scraping
- Web functions
- E-mail Composition and deciphering
- Telnet and SSH
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Additional info for Foundations of Python Network Programming: The comprehensive guide to building network applications with Python
Error instead. Two last points should be made about the connect() call. First, doing a connect() on a UDP socket, of type SOCK_DGRAM, does not send any information across the network, nor do anything to warn the server that packets might be coming. It simply writes the address and port number into the operating system’s memory for use when you run send() and recv(), and then returns control to your program without doing any actual network communication. Second, doing a connect(), or even filtering out unwanted packets yourself using the return address, is not a form of security!
The foregoing discussion, as we will learn in Chapter 3, applies equally well to TCP communications, and, in fact, the IANA seems to consider the port-number range to be a single resource shared by both TCP and UDP. They never assign a given port number to one service under TCP but to another service under UDP, and, in fact, usually assign both the UDP and TCP port numbers to a given service even if it is very unlikely to ever use anything other than TCP. Sockets Enough explanation! It is time to show you source code.
It will then be up to the gateway machine to decide where to send the packet after that. Of course, routing is only this simple at the very edge of the Internet, where the only decisions are whether to keep the packet on the local network or to send it winging its way across the rest of the Internet. You can imagine that routing decisions are much more complex for the dedicated network devices that form the Internet’s backbone! There, on the hubs that connect entire continents, elaborate routing tables have to be constructed, consulted, and constantly updated in order to know that packets destined for Google go in one direction, but packets directed to a Yahoo IP address go in another, and that packets directed to your machine go in yet another.