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Snap (web framework)
Web development framework in Haskell

Snap is a web framework for developing web applications written in the functional programming language Haskell.

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Overview

The Snap framework consists of the following:

  • snap-core,3 a generic Haskell web server API.
  • snap-server,4 a fast5 HTTP server that implements the snap-core interface.
  • Heist,6 an HTML-based templating system for generating pages that allows you to bind Haskell functionality to HTML tags for a clean separation of view and backend code, much like Lift's snippets. Heist is self-contained and can be used independently.
  • Snaplets,7 a high-level system for building modular web applications.
  • Built-in snaplets for templating, session management, and authentication.
  • Third party snaplets for features including file uploads, database connectivity (PostgreSQL, MongoDB, etc.), generation of JavaScript from Haskell code, and more.
  • The Snap monad for stateful access to HTTP requests and responses.8

Snap runs on both Windows NT and Unix-like platforms. Snap uses the Iteratee input/output (I/O) model,9 As of version 1.0, its I/O is implemented with io-streams.

Usage

Snap is used by Silk,10 JanRain,1112 Racemetric,13 Lee Paste's Financial Blog,1415 SooStone Inc, and Group Commerce. Snap is also used as a lightweight, standalone Haskell server. The static site generator Hakyll uses Snap for its preview mode.16

Other Haskell web frameworks

References

  1. Collins, Gregory; Beardsley, Doug (January–February 2011). "The Snap Framework: A Web Toolkit for Haskell" (PDF). IEEE Internet Computing. 15 (1): 84–87. doi:10.1109/mic.2011.21. http://steve.vinoski.net/pdf/IC-Snap_Framework.pdf ↩

  2. Biscardi, Chris (2014). Snap for Beginners. Gumroad. https://gumroad.com/l/qWMnO ↩

  3. "snap-core". Hackage.org. http://hackage.haskell.org/package/snap-core ↩

  4. "snap-server". Hackage.org. http://hackage.haskell.org/package/snap-server ↩

  5. "Snap 0.3 benchmarks with GHC 7.0.1". Snap Framework.com. Retrieved 2014-03-02. http://snapframework.com/blog/2010/11/17/snap-0.3-benchmarks ↩

  6. Snap Framework Team. "Snap: A Haskell Web Framework: Heist Tutorial". Snap Framework.com. http://snapframework.com/docs/tutorials/heist ↩

  7. Snap Framework Team. "Snap: A Haskell Web Framework: Snaplet Directory". Snap Framework.com. http://snapframework.com/snaplets ↩

  8. "Snap.Core". Hackage.org. http://hackage.haskell.org/package/snap-core-0.9.6.0/docs/Snap-Core.html#t:Snap ↩

  9. "InfoQ Interview: Gregory Collins on High Performance Web Apps with Snap and Haskell". Sep 12, 2011. http://www.computer.org/portal/web/computingnow/content?g=53319&type=article&urlTitle=gregory-collins-on-high-performance-web-apps-with-snap-and-haskell ↩

  10. "FP Complete Case Study – Silk – Structured Content Management" (PDF). FP Complete. Retrieved 2014-03-02. https://www.fpcomplete.com/wp-content/uploads/2013/05/Silk%20case%20study.pdf ↩

  11. "FP Complete Case Study – JanRain – User Management System" (PDF). FP Complete. Retrieved 2014-03-02. https://www.fpcomplete.com/wp-content/uploads/2013/05/janrain%20case%20study.pdf ↩

  12. "Blog tutorial on Snap and PostgreSQL". JanRain. Retrieved 2014-03-02. http://janrain.com/blog/tutorial-building-a-sample-application-with-haskell-snap-postgresql-and-the-postgresql-simple-snaplet/ ↩

  13. Hoersten, Luke. "Haskell Snap App in Production". Retrieved 2014-03-02. http://blog.hoersten.co/post/76773146365/haskell-snap-app-in-production ↩

  14. "Lee Paste". Lee Paste's Financial Blog. http://www.lpaste.net/ ↩

  15. Done, Chris. "lpaste source code". GitHub. Retrieved 2014-03-02. https://github.com/chrisdone/lpaste/blob/master/hpaste.cabal#L102 ↩

  16. Van der Jeugt, Jasper. "Hakyll". JasperVdJ.be. Retrieved 2024-11-09. http://jaspervdj.be/hakyll/ ↩

  17. "scotty: Haskell web framework inspired by Ruby's Sinatra, using WAI and Warp". Hackage.org. http://hackage.haskell.org/package/scotty ↩

  18. "Spock: Another Haskell web framework for rapid development". Hackage.org. http://hackage.haskell.org/package/Spock ↩

  19. "MFlow: stateful, RESTful web framework". Hackage.org. http://hackage.haskell.org/package/MFlow ↩

  20. "miso: A tasty Haskell front-end framework". Hackage.org. http://hackage.haskell.org/package/miso ↩