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lecture: RESTing on HTTP

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REST is a concept to exchange data. With the ascent of javascript
frontends like angular.js, REST becomes important even for sites that do
not provide data for external services.
REST is not only about nice URLs, but also about correctly using HTTP.
We will look at representation and stateless applications. This talk is
an introduction for people new to REST and those who want a refresher of
the fundamentals.