simple-statistics-dump

Statistics gathering server made for Ludum Dare games

It already happened twice, that one and a half hours before the deadline of the Jam we decided to set up a simple web server in order to send statistics about player decisions. And both times I failed because of stupid reasons.

Next time we are prepared and can reuse this!

Running

Needs Java 11.

java -Dserver.port=5000 -DstatisticsFileFolder=/tmp/ -jar simple-statistics-dump-0.0.1-SNAPSHOT.jar

statisticsFileFolder should end with a trailing slash! The default is /tmp.

Functionality

Server receives entries from clients, stores them all in a big json file and optionally returns a processed version of all entries. This can then be shown to the players.

1. Clients submit their statistics to the server
2. Server appends those to the <statisticsFileFolder>/statistics.json file
3. Server optionally processes the whole statistics file and computes some result json
4. Server responds this result to client
5. Client shows info to players

When run, the application exposes two endpoints for sending information to the server.

Namely POST <host>/submit-statistics with body

{
    "ending": "ending1",
    "distanceTraveled": 2507,
    "endbossDefeated": true
}

and GET <host>/submit-statistics?ending=ending1&distanceTraveled=2507&endbossDefeated=true.

The POST endpoint should be preferred, but if unforeseen problems with CORS or something arise, then GET might be a useful workaround.

Example client code

const SERVER_URL = "<HOST>:5000"

export async function sendStatistics(decision) {
    const content = {
        ending: decision,
        distanceTraveled: 2507,
        endbossDefeated: true
    }

    const response = await fetch(`${SERVER_URL}/submit-statistics`, {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify(content)
    })
    console.log(await response.json());
}