One thing that the Play framework has in common with other RESTful architectures is the direct use of HTTP functionality, instead of trying to hide HTTP or put an abstraction layer on top of it. This article shows you how to use HTTP content negotiation in a Play framework web application.
After you have built the initial version of a web application, it can be hard to know what to add in version 2.0, tricky to know how add value and make it expensive software, and near-impossible to understand what features a web 2.0 application actually has. This article describes some common features that you might think are merely Nice To Have, and why you might really need them sooner rather than later.
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