erlio

Erlang url shortener project, visit erlio.in.

Goals

• webmachine application
• eunit tests included
• upgradable via hot code loading
• web interface
• gather stats

Author(s)

• Tim McGilchrist [email protected]

Copyright

Copyright (c) 2012 Tim McGilchrist [email protected]. All rights reserved.

TODO

• main resource that translates short urls to a 302 redirect (DONE)
• short resource serves up index.html (DONE)
• tweak css so we see the full path in the UI. (DONE)
• port to use postgres database (*)
• add goto button on UI to see we get 302 redirect.
• write out long form blog post as Markdown
• checking what gen_S are running

Nice to have:

• fault tolerance for event handler, how should it's supervisor look, what happens when something errors out?
• generate shorter unique links
• gen_event calls to tally statistics on how many urls get visited, etc
• clean up javascript to provide a copy to paste bin implementation
• deploy to heroku (DONE) (http://fast-sea-3371.herokuapp.com/)
• check whether link already exists and return correct code
• add support for viewing events generated by the server

Deploy

Setup heroku

heroku create --buildpack "https://github.com/archaelus/heroku-buildpack-erlang.git"

To deploy latest commited change just:

git push heroku master

The last line of the output will show the url for your app.

Uses the heroku build pack here https://github.com/archaelus/heroku-buildpack-erlang If the app doesn't start use heroku logs to see why it's failing

Resources

• erlio_assets_resource - serves static assets like JS/CSS/HTML. Also gets a link and provides a 302 redirect to the correct location
• erlio_link_resource - gets links from the application
• erlio_links_resource - creates links from the application
• erlio_stats_resource - displays the stats for the application

Basic Structure

erlio_sup
 |
 \--------------------------------------------------
     |                       |                  |
 webmachine_mochiweb    erlio_store        erlio_events

• erlio_sup - the main supervisor under which everything lives
• webmachine_mochiweb - http / REST resources
• erlio_store - datastore that talks to a persistent data store
• erlio_events - out of band event processing, gathering statistics