November 2011
Intermediate to advanced
320 pages
10h 18m
English
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Keepalive Sessions
Originally, HTTP sessions were meant to happen in one shot: Make one request for each TCP connection, rinse, and repeat. The overhead of repeatedly completing a three-step TCP handshake (and forking off a new process in the traditional Unix server design model) soon proved to be a bottleneck, so HTTP/1.1 standardized the idea of keepalive sessions instead.
The existing protocol already gave the server an understanding of where the client request ended (an empty line, optionally followed by Content-Length bytes of data), but to continue using the existing connection, the client also needed to know the same about the returned document; the termination of a connection could no longer serve as an indicator. Therefore, keepalive sessions ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.