By Brandon Rhodes, John Goerzen (auth.)
Foundations of Python community Programming, Third Edition, covers the entire vintage issues present in the second one version of this booklet, together with community protocols, community information and mistakes, e mail, server structure, and HTTP and net functions, plus updates for Python 3.
Some of the hot issues during this variation include:
• large insurance of the up to date SSL aid in Python 3
• tips on how to write your personal asynchronous I/O loop.
• an summary of the "asyncio" framework that incorporates Python 3.4.
• How the Flask internet framework connects URLs for your Python code.
• How cross-site scripting and cross-site request forgery can be utilized to assault your site, and the way to guard opposed to them.
• How a full-stack net framework like Django can automate the around journey out of your database to the reveal and back.
If you are a Python programmer who wishes a deep figuring out of ways to take advantage of Python for network-related initiatives and purposes, this can be the e-book for you. From internet program builders, to structures integrators, to procedure administrators—this booklet has every thing you have to know.
Read Online or Download Foundations of Python Network Programming: Third Edition PDF
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Additional info for Foundations of Python Network Programming: Third Edition
Instead of sending a datagram to some other specific host, you can address it to an entire subnet to which your machine is attached and have the physical network card broadcast the datagram so that all attached hosts see it without its having to be copied separately to each one of them. It should be immediately mentioned that broadcast is considered passé these days because a more sophisticated technique called multicast has been developed that lets modern operating systems take better advantage of the intelligence built into many networks and network interface devices.
However, what if both requests made it to the server and the replies have been just a bit slow in making it back? You received one of the two replies, but is the other about to arrive? If you now send request B to the server and start listening, you will almost immediately receive the duplicate reply A and perhaps think that it is the answer to the question you asked in request B, and you will become confused. You could, from then on, wind up completely out of step, interpreting each reply as corresponding to a different request than the one you think it does!
This is called flow control. This lets a receiver forbid the transmission of additional packets in cases where its input buffer is full, and it would have to discard more data anyway even if it were to arrive. • Finally, if TCP believes that packets are being dropped, it assumes that the network is becoming congested and reduces how much data it sends every second. This can be something of a disaster on wireless networks and other media where packets are lost simply because of noise. It can also ruin connections that are running fine until a router reboots and the endpoints cannot talk for, say, 20 seconds.