Snap (web framework) explained

Snap
Author:	Gregory Collins, Doug Beardsley^[1]
Developer:	Snap Team
Released:	May 2010
Latest Release Version:	1.1.3.2^[2]
Operating System:	Cross-platform
Programming Language:	Haskell
Genre:	Web framework
License:	BSD License

Snap is a web development framework written in the Haskell programming language.^{[3] [4]}

Overview

The Snap framework consists of the following:

• snap-core,^[5] a generic Haskell web server API.
• snap-server,^[6] a fast^[7] HTTP server that implements the snap-core interface.
• Heist,^[8] 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,^[9] 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.^[10]

Snap runs on both Windows NT and Unix-like platforms. Snap uses the Iteratee I/O model,^[11] As of version 1.0, its i/o is implemented with io-streams.

Usage

Snap is used by Silk,^[12] JanRain,^{[13] [14]} Racemetric,^[15] www.lpaste.net,^{[16] [17]} 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.^[18]

Other Haskell web frameworks

• Yesod (web framework)
• Servant (web framework)
• Scotty^[19]
• Spock^[20]
• MFlow^[21]
• Miso^[22]

Notes and References

1. Web site: Snap: A Haskell Web Framework: About. The Snap Framework. Team. snapframework.com.
2. Web site: snapframework/snap . github.com.
3. Collins. Gregory. Beardsley. Doug. Jan–Feb 2011. The Snap Framework: A Web Toolkit for Haskell. IEEE Internet Computing. 15 . 1. 84–87 . 10.1109/mic.2011.21.
4. Book: Biscardi, Chris. Snap for Beginners. 2014. Gumroad.
5. Web site: snap-core . www.hackage.org.
6. Web site: snap-server . www.hackage.org.
7. Web site: Snap 0.3 benchmarks with GHC 7.0.1 . www.snapframework.com . 2014-03-02.
8. Web site: Snap: A Haskell Web Framework: Heist Tutorial. The Snap Framework. Team. snapframework.com.
9. Web site: Snap: A Haskell Web Framework: Snaplet Directory. The Snap Framework. Team. snapframework.com.
10. Web site: Snap.Core. hackage.haskell.org.
11. Web site: InfoQ Interview: Gregory Collins on High Performance Web Apps with Snap and Haskell. Sep 12, 2011.
12. Web site: FP Complete Case Study - Silk -- Structured Content Management. FP Complete . 2014-03-02.
13. Web site: FP Complete Case Study - JanRain -- User Management System. FP Complete . 2014-03-02.
14. Web site: Blog tutorial on Snap and PostgreSQL. JanRain . 2014-03-02.
15. Web site: Haskell Snap App in Production . Luke Hoersten . 2014-03-02.
16. Web site: New paste. www.lpaste.net.
17. Web site: lpaste source code. Chris Done . 2014-03-02.
18. Web site: Hakyll - Home. jaspervdj.be.
19. Web site: scotty: Haskell web framework inspired by Ruby's Sinatra, using WAI and Warp. Hackage.
20. Web site: Spock: Another Haskell web framework for rapid development. Hackage.
21. Web site: MFlow: stateful, RESTful web framework. Hackage.
22. Web site: miso: A tasty Haskell front-end framework. Hackage.