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Installation

To download, install (and optimally configure) G-WAN:

 wget http://gwan.com/archives/gwan_linux64-bit.tar.bz2
 tar -xjf gwan_linux64-bit.tar.bz2; cd gwan_linux64-bit
 sudo ./gwan                       (./gwan -h for help)

Then, type http://localhost:8080/ in your browser to play with the provided gwan/.../csp examples, such as:

• AJAX forms (contact, loan, etc.) and COMET (stock quotes streaming)
• Realtime Bandwidth Shaping (see the throttle.c example)
• Caching (using G-WAN's wait-free integrated cache)
• G-WAN wait-free Key-Value store, SQLite, Tokyo Cabinet (all benchmarked)
• Web beacon (1x1 transparent pixel served at the speed of light say users)
• JSON (serialization and de-serialization, benchmarked)
• Chaptchas (easy for humans, hard for machines)
• Charts (area, bar, dot, line, pie, ring - using various styles)
• 24-bit anti-aliased images (frame buffers, PNG, PS, PDF, SVG, OpenGL)
• GIF fractals (ultra-fast in-memory GIF I/O)
• Currency conversions (using the European Central Bank rates)
• Data URIs (inlining images in HTML replies)
• HTTP headers (custom, without, automatically generated)
• HTML validation/clean-up (using the Tidy library)
• Redirections (conditional or static)
• Crash reports (caught in libc, C scripts and G-WAN calls)
• Server report (formatted in ASCII or HTML)

The manual documents server usage, basic and advanced functions and features like G-WAN handlers (which require 10 to 20x less code than Apache, Lighttpd or Nginx modules).

Upgrade: (a) overwrite your ./include, ./libraries files and the gwan executable with the new files and then (b) run G-WAN once without -d (daemon mode) to make sure that the maintenance, servlet and handler scripts compile.

Timeline

The G-WAN development log is available here. You can also reach the relevant entry by clicking on a release date tag (top-right corner of this page).

Questions & Answers

The API and Frequently Asked Questions are worth considering first.

Stackoverflow lists many more examples and will let you search for replies to common questions.

G-WAN works best on Linux distributions like Debian or CentOS, both of which offer 'Desktop' and 'Server' flavors.