Download Learning Python Network Programming by Sam Washington, Faruque Sarker PDF

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By Sam Washington, Faruque Sarker

Community programming has continually been a challenging job. With full-featured and good documented libraries the entire means up the stack, Python makes community programming the relaxing event it's going to be.

Starting with a walkthrough of today's significant networking protocols, with this ebook you'll how one can hire Python for community programming, the right way to request and retrieve internet assets, and the way to extract information in significant codecs over the net. You'll make the most of Python for e-mailing utilizing various protocols and you'll engage with distant structures and IP and DNS networking.

As the ebook progresses, socket programming might be lined, by way of find out how to layout servers and the professionals and cons of multithreaded and event-driven architectures. You'll boost sensible client-side purposes, together with net API consumers, e mail consumers, SSH, and FTP. those purposes may also be applied via latest internet program frameworks.

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Extra info for Learning Python Network Programming

Example text

This has a similar purpose to the lower-level packet headers. The HTTP header contains HTTP-specific metadata about the response that tells the client how to interpret it. Before, urllib parsed this for us, added the data as attributes to the response object, and removed the header data from the output data. We would need to add code to do this as well to make this program as capable as our first one. What can't immediately be seen from the code is that we're also missing out on the urllib module's error checking and handling.

HTTP responses provide a means for us to do this through status codes. We can read the status code of a response by using its status attribute. status 200 Status codes are integers that tell us how the request went. The 200 code informs us that everything went fine. [ 32 ] Chapter 2 There are a number of codes, and each one conveys a different meaning. org/assignments/http-status-codes. We'll be looking at various codes in this chapter. Handling problems Status codes help us to see whether our response was successful or not.

Each ISP gateway connects an ISP network to the regional routers, and each home broadband router has a home network connected to it. In the real world, this arrangement gets more complicated as one goes toward the top. ISPs will often have more than one gateway connecting them to the regional routers, and some of these will also themselves be acting as regional routers. Regional routers also have more tiers than shown here, and they have many connections between one another, which are in arrangements that are much more complicated than this simple hierarchy.

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