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Note that while we provide as much of the media content as we are able via free download, we are sometimes limited by licensing restrictions.Please direct any questions or concerns to The world of web services has been on a fast track to supernova ever since the architect astronauts spotted another meme to rocket out of pragmatism and into the universe of enterprises. A renaissance of HTTP appreciation is building and, under the banner of REST, shows a credible alternative to what the merchants of complexity are trying to ram down everyone’s throats; a simple set of principles that every day developers can use to connect applications in a style native to the Web.Our topic is the set of principles underlying the Web: Representational State Transfer, or REST.For the first time, we set down best practices for “RESTful” web services.Supplemental files and examples for this book can be found at
We also claim to know the reason for this: that there is no essential difference between the human web designed for our own use, and the “programmable web” designed for consumption by software programs.It’s time to put the “web” back into “web services.”The features that make a web site easy for a web surfer to use also make a web service API easy for a programmer to use.To find the principles underlying the design of these services, we can just translate the principles for human-readable web sites into terms that make sense when the surfers are computer programs. Our goal throughout is to show the power (and, where appropriate, the limitations) of the basic web technologies: the HTTP application protocol, the URI naming standard, and the XML markup language.You connected to the server, gave it the path to a document, and then the server sent you the contents of that document. It looked like a featureless rip-off of more sophisticated file transfer protocols like FTP. With tongue only slightly in cheek we can say that HTTP is uniquely well suited to distributed Internet applications because it has no features to speak of. In a twist straight out of a kung-fu movie,: the two basic design decisions that made HTTP an improvement on its rivals, and that keep it scalable up to today’s mega-sites.Many of the features lacking in HTTP 0.9 have since turned out to be unnecessary or counterproductive. Most of the rest were implemented in the 1.0 and 1.1 revisions of the protocol.