Rock-Paper-Scissors-Spock-Lizard an Erlang Web Game using Mochiweb and the Comet technique
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RPSSL - Rock-Paper-Scissors-Spock-Lizard is a simple but famous game for 2 players. Usually it's played with your own hands, in first person, but this is the web version.

The web version uses the Comet technique which is a long running HTTP request that can be used for immediate server push of data to the client.

Each http request is a separate Erlang process. We can leave it to block forever, holding the connection open, since it's using very little resources.


Comet-RPSSL uses mochiweb as a http server. If you don't already have it installed in the Erlang library path, you can use the git submodule:

git submodule init
git submodule update
make mochiweb

Now you can compile and run Comet-RPSSL:

erl -pa ebin/ -pa deps/mochiweb/ebin

For a quick test without a browser, run the following commands in two separate terminals:

curl -d attack=rock http://localhost:9999/test/attack
curl -d attack=scissors http://localhost:9999/test/attack

You will notice how the first one blocks until the second one plays, and then both are immediately released.

The code is MIT licensed.