Scoreboard-server

A simple, yet powerful, single instance implementation of a scoreboard server composed of 2 dockers:

1. Redis to store the scores and ranks in-memory.
2. Golang backend web-handler to receive score requests, based on the excellent Fiber framework.

Quickstart

1. Clone the repo to your localhost or to a cloud instance.
2. Edit docker-compose.yml if needed.
3. docker-compose up.

Prerequisites

Docker & Docker Compose

Usage

Get highest ranked scores (top 10)

Request

GET /getScores

curl -u admin:admin https://localhost/getScores

Response

{
    "count": 3,
    "Users": [
        {
            "name": "Alice",
            "score": 5000,
            "rank": 1
        },
        {
            "name": "Bob",
            "score": 4000,
            "rank": 2
        },
        {
            "name": "Eve",
            "score": 3000,
            "rank": 3
        }
    ]
}

Register a new high score

Request

POST /newScore

curl -X POST \
  -H "Content-Type: application/json" \
  -u admin:admin \
  -d '{"name":"tentacle","uuid":"1feb6f78-6db9-4ef7-97de-5fd2a5eeed62","score":12345}' \
  https://localhost/newScore

Response

{
    "rank": 17
}

Overwriting scores

• uuid is used to allow different high scorers to use the same name.
• A score key is stored as a combination of uuid + name.
• If a new score is registered with the same uuid + name combo it will only be overwritten if it is greater than the last score.
• Otherwise, a rank of -1 will be returned.
• uuid is encapsulated and not returned by the server.

HTTPS

By default, a self-signed certificate will be generated upon starting the service. To change this behaviour, small modifications need to be made to docker-compose.yml and main.go

Scores eviction

Since Redis sorted sets do not support size limiting, periodically, all scores below the 10,000th rank will be evicted.

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

License

MIT