HTTP is one of the most successful protocols in the world, and more and more developers are using it to do more than drive HTML UIs (calling their systems RESTful with various degrees of justification). In a new presentation, recorded at QCon San Francisco 2008, HTTPbis WG chair and Principal Technical Yahoo! Mark Nottingham gives an update on the current status of the HTTP protocol in the wild, and the ongoing work to clarify the HTTP specification.
Mark starts by emphasizing that protocols are hard, and one is doomed to repeat the mistakes of the past if one doesn't understand them. He then dives into a brief history of HTTP and it's versions, both those that are widely deployed as well as those that remained a goal that was never achieved, such as HTTP-NG. He explains why the HTTPbis effort came into existence, and describes its goals. He then describes some areas where the ambiguity or lack of detail in the current specification has led to problems in the deployed Web, and how the working group adds detail to the specification to improve this.
The many topics covered include the level of support for various HTTP methods, the (lack of) usefulness of inventing one's own methods, URI lengths, way to get around limitations in intermediaries, redirect support with POST, cookies, caching, and authentication. Mark also briefly touches upon some newer efforts, such as standardizing a PATCH verb and link headers.
Watch Mark Nottingham's full talk to find out why HTTP is still exciting.
Community comments
Superb
by Robin Howlett,
Precise and Informative
by Chetan Mehrotra,
Great Presentation
by Ross Duncan,
Superb
by Robin Howlett,
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I really enjoyed this presentation and had been looking for something like this for quite some time. Very informative and well presented.
Precise and Informative
by Chetan Mehrotra,
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Very well put and provides quite a bit of info in precise manner. Was not knowing that HTTP has all that capabilities and specially role of intermediaries
Great Presentation
by Ross Duncan,
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A really worthwhile watch.
Interesting to get insights like these into the history and future of a protocol that has become so fundamental to life as we know it. The better we can understand the utility and limitations of the foundational technologies that we are building upon, the better and more durable our architectures will be.