Snap (web framework)

Snap

Original author(s)	Gregory Collins, Doug Beardsley[1]
Developer(s)	Snap Team
Initial release	May 2010
Stable release	0.13[2] / September 9, 2013
Development status	Active
Written in	Haskell
Operating system	Cross-platform
Type	Web framework
License	BSD License
Website	www.snapframework.com

Snap is a simple web development framework written in the Haskell programming language.^[3][4] It is used by Silk,^[5] JanRain,^[6][7] Racemetric,^[8] www.lpaste.net,^[9] SooStone Inc, and Group Commerce. Snap is also used as a lightweight, standalone Haskell server. The popular static site generator Hakyll uses Snap for its preview mode.

Overview

The Snap framework comprises:

• snap-core,^[10] a generic Haskell web server API.
• snap-server,^[11] a fast^[12] HTTP server that implements the snap-core interface.
• Heist, 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 completely self-contained and can be used independently.
• Snaplets, a high-level system for building modular web applications.
• Built-in snaplets for templating, session management, and authentication.
• Third party snaplets for features such as 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.

Snap runs on both Windows and *nix platforms. Snap uses the Iteratee I/O model,^[13] As of version 1.0, its i/o is implemented with io-streams.

Other Haskell web frameworks

• Yesod (web framework)
• Happstack
• Scotty web framework
• Spock web framework
• MFlow web framework

References

1. Snap team
2. http://snapframework.com/blog/2013/09/09/snap-0.13-released
3. Collins, Gregory; Beardsley, Doug (Jan–Feb 2011). "The Snap Framework: A Web Toolkit for Haskell" (PDF). IEEE Internet Computing 15 (1): 84–87. doi:10.1109/mic.2011.21.
4. Biscardi, Chris (2014). Snap for Beginners. Gumroad.
5. "FP Complete Case Study - Silk -- Structured Content Management" (PDF). FP Complete. Retrieved 2014-03-02.
6. "FP Complete Case Study - JanRain -- User Management System" (PDF). FP Complete. Retrieved 2014-03-02.
7. "Blog tutorial on Snap and PostgreSQL". JanRain. Retrieved 2014-03-02.
8. "Haskell Snap App in Production". Luke Hoersten. Retrieved 2014-03-02.
9. "lpaste source code". Chris Done. Retrieved 2014-03-02.
10. "snap-core". www.hackage.org.
11. "snap-server". www.hackage.org.
12. "Snap 0.3 benchmarks with GHC 7.0.1". www.snapframework.com. Retrieved 2014-03-02.
13. "InfoQ Interview: Gregory Collins on High Performance Web Apps with Snap and Haskell". Sep 12, 2011.

External links

• Snap framework
• Snap for Beginners book