transbeam/README.md

<p align="center">
    <img alt="transbeam logo: a laser warning sign in trans flag colors" height="128" src="https://git.xeno.science/xenofem/transbeam/raw/branch/main/static/images/site-icons/transbeam.svg">
</p>
<h3 align="center">transbeam</h3>
<p align="center">A low-latency file drop web app</p>

## features

- One-to-many transfer of large files
- Simple web UI for sender and receivers
- Receivers can begin downloading *immediately*, without needing to
  wait for the upload to finish
- Receivers can also download after the upload is complete and the
  sender has gone offline
- Easy to send multiple files at once - they're bundled into a zip
  file for receivers, with zero compression so extraction is quick
- Sanitises filenames, using sensible non-obnoxious defaults that
  should be safe across platforms
- Fires a laser beam that turns you trans

## configuration

transbeam is configured with the following environment variables:
- `TRANSBEAM_STORAGE_DIR`: path where uploaded files should be stored (default: `./storage`)
- `TRANSBEAM_STATIC_DIR`: path where the web app's static files live (default: `./static`)
- `TRANSBEAM_PORT`: port to listen on localhost for http requests (default: 8080)
- `TRANSBEAM_MAX_LIFETIME`: maximum number of days files can be kept for (default: 30)
- `TRANSBEAM_MAX_UPLOAD_SIZE`: maximum size, in bytes, of a fileset
  being uploaded (default: 16GiB)
- `TRANSBEAM_MAX_STORAGE_SIZE`: maximum total size, in bytes, of all
  files being stored by transbeam (default: 64GiB)
- `RUST_LOG`: log levels, for the app as a whole and/or for specific
  submodules/libraries. See
  [`env_logger`](https://docs.rs/env_logger/latest/env_logger/)'s
  documentation for details.

## running

### nix flakes

```
nix run git+https://git.xeno.science/xenofem/transbeam?ref=main
```

(The Nix package is wrapped with `TRANSBEAM_STATIC_DIR` set automatically to the
correct Nix store path, so it'll serve the static files properly
no matter what directory you run it from.)

### non-nix

```
git clone https://git.xeno.science/xenofem/transbeam
cd transbeam
cargo run --release
```

## todo

- uploader auth
- downloader auth
- delete uploads after a while
- configurable maximum file size