# Yumechi-no-kuni-proxy-worker

This is a misskey proxy worker for　ゆめちのくに (Yumechi-no-kuni) instance. Runs natively on both local and Cloudflare Workers environments!


Work in progress! Currently to do:

- [X] Content-Type sniffing
- [X] SVG rendering
   - [ ] Font rendering (likely will not run on Cloudflare Workers Free plan)
- [X] Preset image resizing
- [X] Opportunistic Redirection on large video files
- [X] RFC9110 compliant proxy loop detection with defensive programming against known vulnerable proxies
- [X] HTTPs only mode and X-Forwarded-Proto reflection
- [X] Cache-Control header
- [X] Rate-limiting on local deployment (untested)
- [X] Read config from Cloudflare
- [X] Timing and Rate-limiting headers (some not available on Cloudflare Workers)
- [ ] Cache Results on Cloudflare KV.
- [ ] Handle all possible panics reported by Clippy
- [X] Sandboxing the image rendering

## Demo

### Avatar resizing

Preview at: 

[https://yumechi-no-kuni-proxy-worker.eternal-flame-ad.workers.dev/proxy/avatar.webp?url=https://media.misskeyusercontent.com/io/274cc4f7-4674-4db1-9439-9fac08a66aa1.png](https://yumechi-no-kuni-proxy-worker.eternal-flame-ad.workers.dev/proxy/avatar.webp?url=https://media.misskeyusercontent.com/io/274cc4f7-4674-4db1-9439-9fac08a66aa1.png)

Image:

![Syuilo Avatar resived.png](https://yumechi-no-kuni-proxy-worker.eternal-flame-ad.workers.dev/proxy/avatar.webp?url=https://media.misskeyusercontent.com/io/274cc4f7-4674-4db1-9439-9fac08a66aa1.png)


### SVG rendering

(font rendering disabled due to size restrictions)

[https://yumechi-no-kuni-proxy-worker.eternal-flame-ad.workers.dev/proxy/static.webp?url=https://upload.wikimedia.org/wikipedia/commons/a/ad/AES-AddRoundKey.svg](https://yumechi-no-kuni-proxy-worker.eternal-flame-ad.workers.dev/proxy/static.webp?url=https://upload.wikimedia.org/wikipedia/commons/a/ad/AES-AddRoundKey.svg)

![AES-AddRoundKey.svg](https://yumechi-no-kuni-proxy-worker.eternal-flame-ad.workers.dev/proxy/static.webp?url=https://upload.wikimedia.org/wikipedia/commons/a/ad/AES-AddRoundKey.svg)

## Setup and Deployment

1. Clone this repository. Load the submodules with `git submodule update --init`.
2. Install Rust and Cargo, using [rustup](https://rustup.rs/) is recommended. 
   If you do not plan on deploying to Cloudflare Workers, you can remove the `rust-toolchain` file intended to get around [cloudflare/worker-rs#668](https://github.com/cloudflare/workers-rs/issues/668). Otherwise you may need to install that specific version of Rust by `rustup install $(cat rust-toolchain)`.
3. IF deploying locally:
   
      1. Edit `local.toml` to your liking. The documentations can be opened with `cargo doc --open`.

      2. Test run with `cargo run --features env-local -- -c local.toml`. Additional features `apparmor` and `reuse-port` are available for Linux users.

      3. Build with `cargo build --features env-local --profile release-local`. The built binary will be in `target/release-local/yumechi-no-kuni-proxy-worker`.

      4. The only flag understood is `-c` for the configuration file. The configuration file is in TOML format. However, the `RUST_LOG` environment variable will change the log level. The log level is `info` by default if the environment variable is not set.
   
   IF deploying to Cloudflare Workers:

      5. Add the wasm target with `rustup +$(cat rust-toolchain) target add wasm32-unknown-unknown`.

      6. Have a working JS environment.

      7. Install `wrangler` with you JS package manager of choice. See https://developers.cloudflare.com/workers/wrangler/install-and-update/. `npx` also works.
   
      8. Edit `wrangler.toml` to your liking. Everything in the `[vars]` section maps directly into the `config` section of the TOML configuration file. There is a `cf-worker-paid` feature set which enable some additional features that will never fit in the free plan, mainly SVG font rendering and some debugging features.

      9. Test locally with `wrangler dev`.

      10. Deploy with `wrangler deploy --outdir bundled/`.