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RESTAS is a Common Lisp web application framework. Its key features are:

  • RESTAS was developed to simplify development of web applications following the REST architectural style.
  • RESTAS is based on the Hunchentoot HTTP server. Web application development with RESTAS is in many ways simpler than with Hunchentoot, but some knowledge of Hunchentoot is required, at least about working with hunchentoot:request and hunchentoot:reply.
  • Request dispatch is based on a route system. The route system is the key concept of RESTAS and provides unique features not found in other web frameworks.
  • The other key RESTAS concept is its module system, which provides a simple and flexible mechanism for modularized code reuse.
  • Interactive development support. Any RESTAS code (such as the definition of a route, a module or a submodule) can be recompiled at any time when you work in SLIME and any changes you made can be immediately seen in the browser. No web server restart or other complicated actions are needed.
  • SLIME integration. The inner structure of a web application can be investigated with the standard "SLIME Inspector." For example, there is a "site map" and a simple code navigation with this map.
  • Easy to use, pure Lisp web application daemonization facility based on RESTAS and SBCL in Linux without the use of Screen or detachtty.
  • RESTAS is not an MVC framework, although it is not incompatible with the concept. From the MVC point of view, RESTAS provides the controller level. Nevertheless, RESTAS provides an effective and flexible way for separation of logic and representation, because it does not put any constraints on the structure of applications. Separation of model and controller can be effectively performed with Common Lisp facilities, and, hence, doesn't need any special support from the framework.
  • RESTAS does not come with a templating library. cl-closure-template and HTML-TEMPLATE are two good templating libraries that can be used with RESTAS.

RESTAS is distributed under the terms of the Lisp LGPL license.