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Introduction to Web Application Development in Clojure
The document discusses web application development in Clojure, focusing on key libraries such as Ring for HTTP abstraction and Compojure for web routing. It outlines project setup using Leiningen, including commands for creating and configuring a Clojure web app, and highlights the use of Enlive for templating. Additional resources and links for practical examples are provided.
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Introduction to Web Application Development in Clojure
- 1. Web Application Development in Clojure Jacek Laskowski@JacekLaskowski blog.japila.pl Kiev, Ukraine, 24.05.2013
- 2. Map data structurein Clojure Symbol “m” points at the map
- 3. Map in Clojure •Map maps keys to values • Maps are functions of their keys • Keywords usually keys • assoc to add key and value • dissoc to remove keys
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- 7. Leiningen • Automating Clojure projectswith Clojure • lein help when in trouble • http://leiningen.org/
- 8. Project setup • leinnew jeeconf-clojure-webapp • cd jeeconf-clojure-webapp • Configure project in project.clj • ...more soon
- 9. Ring • Clojure libraryfor web application development • HTTP abstraction = HTTP requests are Clojure maps • https://github.com/ring- clojure/ring
- 11. Project’s project.clj • Ring1.2.0 Beta 3 • Clojure 1.5.1
- 12. Project setup cont. •lein repl • (use 'ring.adapter.jetty) • (run-jetty handler options) • (doc run-jetty) when in trouble
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- 15. Ring Utils • ring.util.response •response • not-found • ring.handler.dump • handle-dump • ring.middleware.stacktrace • wrap-stacktrace-web
- 16. Responds differently basedon the URI of a request What does the handler do?
- 17. Compojure • Clojure libraryfor web routing • DSL to generate Ring handler functions • http://compojure.org/
- 19. Project’s project.clj cont. •Compojure 1.1.5 • Ring 1.2.0 Beta 3 • Clojure 1.5.1
- 20. Project setup cont. •lein repl • (use 'ring.adapter.jetty) • (run-jetty handler options) • (use ‘compojure.core) • (defroutes) • GET et al.
- 22. Compojure Utils • compojure.route •files • not-found • resources • compojure.handler • api • site
- 23. Generates HTML pagesbased on the URI of a request What does the app do?
- 24. Enlive • Clojure libraryfor web templates • Enlive template is a HTML file and a deftemplate form • https://github.com/cgrand/ enlive
- 26. Project’s project.clj cont. •Enlive 1.1.1 • Compojure 1.1.5 • Ring 1.2.0 Beta 3 • Clojure 1.5.1
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