PluralKit/crates/api/src/main.rs

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Rust
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#![feature(let_chains)]
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use axum::{
body::Body,
extract::{Request as ExtractRequest, State},
http::{Response, StatusCode, Uri},
response::IntoResponse,
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routing::{delete, get, patch, post},
Router,
};
use hyper_util::{
client::legacy::{connect::HttpConnector, Client},
rt::TokioExecutor,
};
use tracing::{error, info};
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mod endpoints;
mod error;
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mod middleware;
mod util;
#[derive(Clone)]
pub struct ApiContext {
pub db: sqlx::postgres::PgPool,
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pub redis: fred::clients::RedisPool,
rproxy_uri: String,
rproxy_client: Client<HttpConnector, Body>,
}
async fn rproxy(
State(ctx): State<ApiContext>,
mut req: ExtractRequest<Body>,
) -> Result<Response<Body>, StatusCode> {
let path = req.uri().path();
let path_query = req
.uri()
.path_and_query()
.map(|v| v.as_str())
.unwrap_or(path);
let uri = format!("{}{}", ctx.rproxy_uri, path_query);
*req.uri_mut() = Uri::try_from(uri).unwrap();
Ok(ctx
.rproxy_client
.request(req)
.await
.map_err(|error| {
error!(?error, "failed to serve reverse proxy to dotnet-api");
StatusCode::BAD_GATEWAY
})?
.into_response())
}
// this function is manually formatted for easier legibility of route_services
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#[rustfmt::skip]
fn router(ctx: ApiContext) -> Router {
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// processed upside down (???) so we have to put middleware at the end
Router::new()
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.route("/v2/systems/{system_id}", get(rproxy))
.route("/v2/systems/{system_id}", patch(rproxy))
.route("/v2/systems/{system_id}/settings", get(rproxy))
.route("/v2/systems/{system_id}/settings", patch(rproxy))
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.route("/v2/systems/{system_id}/members", get(rproxy))
.route("/v2/members", post(rproxy))
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.route("/v2/members/{member_id}", get(rproxy))
.route("/v2/members/{member_id}", patch(rproxy))
.route("/v2/members/{member_id}", delete(rproxy))
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.route("/v2/systems/{system_id}/groups", get(rproxy))
.route("/v2/groups", post(rproxy))
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.route("/v2/groups/{group_id}", get(rproxy))
.route("/v2/groups/{group_id}", patch(rproxy))
.route("/v2/groups/{group_id}", delete(rproxy))
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.route("/v2/groups/{group_id}/members", get(rproxy))
.route("/v2/groups/{group_id}/members/add", post(rproxy))
.route("/v2/groups/{group_id}/members/remove", post(rproxy))
.route("/v2/groups/{group_id}/members/overwrite", post(rproxy))
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.route("/v2/members/{member_id}/groups", get(rproxy))
.route("/v2/members/{member_id}/groups/add", post(rproxy))
.route("/v2/members/{member_id}/groups/remove", post(rproxy))
.route("/v2/members/{member_id}/groups/overwrite", post(rproxy))
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.route("/v2/systems/{system_id}/switches", get(rproxy))
.route("/v2/systems/{system_id}/switches", post(rproxy))
.route("/v2/systems/{system_id}/fronters", get(rproxy))
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.route("/v2/systems/{system_id}/switches/{switch_id}", get(rproxy))
.route("/v2/systems/{system_id}/switches/{switch_id}", patch(rproxy))
.route("/v2/systems/{system_id}/switches/{switch_id}/members", patch(rproxy))
.route("/v2/systems/{system_id}/switches/{switch_id}", delete(rproxy))
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.route("/v2/systems/{system_id}/guilds/{guild_id}", get(rproxy))
.route("/v2/systems/{system_id}/guilds/{guild_id}", patch(rproxy))
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.route("/v2/members/{member_id}/guilds/{guild_id}", get(rproxy))
.route("/v2/members/{member_id}/guilds/{guild_id}", patch(rproxy))
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.route("/v2/systems/{system_id}/autoproxy", get(rproxy))
.route("/v2/systems/{system_id}/autoproxy", patch(rproxy))
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.route("/v2/messages/{message_id}", get(rproxy))
.route("/private/bulk_privacy/member", post(rproxy))
.route("/private/bulk_privacy/group", post(rproxy))
.route("/private/discord/callback", post(rproxy))
.route("/private/discord/callback2", post(endpoints::private::discord_callback))
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.route("/private/discord/shard_state", get(endpoints::private::discord_state))
.route("/private/stats", get(endpoints::private::meta))
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.route("/v2/systems/{system_id}/oembed.json", get(rproxy))
.route("/v2/members/{member_id}/oembed.json", get(rproxy))
.route("/v2/groups/{group_id}/oembed.json", get(rproxy))
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.layer(middleware::ratelimit::ratelimiter(middleware::ratelimit::do_request_ratelimited)) // this sucks
.layer(axum::middleware::from_fn_with_state(ctx.clone(), middleware::authnz))
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.layer(axum::middleware::from_fn(middleware::ignore_invalid_routes))
.layer(axum::middleware::from_fn(middleware::cors))
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.layer(axum::middleware::from_fn(middleware::logger))
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.layer(tower_http::catch_panic::CatchPanicLayer::custom(util::handle_panic))
.with_state(ctx)
.route("/", get(|| async { axum::response::Redirect::to("https://pluralkit.me/api") }))
}
#[libpk::main]
async fn main() -> anyhow::Result<()> {
let db = libpk::db::init_data_db().await?;
let redis = libpk::db::init_redis().await?;
let rproxy_uri = Uri::from_static(
&libpk::config
.api
.as_ref()
.expect("missing api config")
.remote_url,
)
.to_string();
let rproxy_client = hyper_util::client::legacy::Client::<(), ()>::builder(TokioExecutor::new())
.build(HttpConnector::new());
let ctx = ApiContext {
db,
redis,
rproxy_uri: rproxy_uri[..rproxy_uri.len() - 1].to_string(),
rproxy_client,
};
let app = router(ctx);
let addr: &str = libpk::config
.api
.as_ref()
.expect("missing api config")
.addr
.as_ref();
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let listener = tokio::net::TcpListener::bind(addr).await?;
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info!("listening on {}", addr);
axum::serve(listener, app).await?;
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Ok(())
}