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scalesocket

★ 31 Open GitHub ↗

Turn any code into a multiplayer websocket server. A drop-in replacement for websocketd.

// repository documentation

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# ScaleSocket

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Turn any code into a multiplayer websocket server.

![High level architecture diagram on ScaleSocket usage](https://github.com/scalesocket/scalesocket/blob/main/assets/diagram-usage.svg?raw=true)

## About

ScaleSocket is a command-line tool for serving a binary or a script over websockets.
If you need to quickly cook up a collaborative websocket server, ScaleSocket might be the tool for you.

To use it, you start your script using ScaleSocket and it maps the standard input and output streams to a websocket.

Furthermore, it supports rooms.
Multiple websocket connections to the same URL will be routed to the same process.
It makes building multiplayer apps, collaborative editing, and games a breeze.

Your script does not need to implement any network code or room handling logic.

## Documentation

For full details and installation instructions, see the [documentation](https://www.scalesocket.org/docs/).

## Features

* Share a backend process between websocket clients
* Proxy websocket traffic to normal TCP socket or stdio
* Route server messages to specific clients
* Serve static files
* Expose CGI [environment variables](https://www.rfc-editor.org/rfc/rfc3875.html) to backend process
* [OpenMetrics](https://github.com/OpenObservability/OpenMetrics) compatible
* Built-in lobby server for listing rooms

## Quick Start

Create the file `example.sh` with the follow content:
```console
#!/bin/bash
echo '{"message": "hello world"}'
sleep 1
echo '{"message": "goodbye"}'
sleep 1
```

Make it executable:
```console
$ chmod u+x example.sh
```

Wrap it by starting the ScaleSocket server:
```console
$ scalesocket ./example.sh
```

Then connect to the websocket endpoint, for example using curl:
```console
$ curl --include \
       --no-buffer \
       --http1.1 \
       --header "Connection: Upgrade" \
       --header "Upgrade: websocket" \
       --header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
       --header "Sec-WebSocket-Version: 13" \
       http://localhost:9000/exampleroom
�{"message": "hello world"}�{"message": "goodbye"}%
```

For more advanced usage and features, see [usage](https://www.scalesocket.org/docs/usage).

## Alternatives and Comparison

See [comparison](https://www.scalesocket.org/docs/comparison).

## License

* Apache License, Version 2.0 ([LICENSE](https://github.com/scalesocket/scalesocket/blob/HEAD/LICENSE) or [www.apache.org](http://www.apache.org/licenses/LICENSE-2.0))

## Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be licensed as above, without any additional terms or conditions.

scalesocket

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