mirror of https://github.com/MingweiSamuel/Riven
194 lines
6.2 KiB
Rust
194 lines
6.2 KiB
Rust
// #![deny(warnings)]
|
|
|
|
use std::convert::Infallible;
|
|
|
|
use http::{Method, Request, Response, StatusCode};
|
|
use hyper::header::HeaderValue;
|
|
use hyper::service::{make_service_fn, service_fn};
|
|
use hyper::{http, Body, Server};
|
|
use lazy_static::lazy_static;
|
|
use riven::consts::Route;
|
|
use riven::{RiotApi, RiotApiConfig};
|
|
use tracing as log;
|
|
|
|
lazy_static! {
|
|
/// Create lazy static RiotApi instance.
|
|
/// Easier than passing it around.
|
|
pub static ref RIOT_API: RiotApi = {
|
|
let api_key = std::env::var("RGAPI_KEY").ok()
|
|
.or_else(|| {
|
|
let path: std::path::PathBuf = [ env!("CARGO_MANIFEST_DIR"), "../../apikey.txt" ].iter().collect();
|
|
std::fs::read_to_string(path).ok()
|
|
})
|
|
.expect("Failed to find RGAPI_KEY env var or apikey.txt.");
|
|
RiotApi::new(RiotApiConfig::with_key(api_key.trim()).preconfig_burst())
|
|
};
|
|
}
|
|
|
|
/// Helper to create JSON error responses.
|
|
fn create_json_response(body: &'static str, status: StatusCode) -> Response<Body> {
|
|
let mut resp = Response::new(Body::from(body));
|
|
*resp.status_mut() = status;
|
|
resp.headers_mut().insert(
|
|
hyper::header::CONTENT_TYPE,
|
|
HeaderValue::from_static("application/json"),
|
|
);
|
|
resp
|
|
}
|
|
|
|
/// Main request handler service.
|
|
async fn handle_request(req: Request<Body>) -> Result<Response<Body>, Infallible> {
|
|
let (parts, body) = req.into_parts();
|
|
let http::request::Parts { method, uri, .. } = parts;
|
|
|
|
// Handle path.
|
|
let path_data_opt = parse_path(&method, uri.path());
|
|
let (route, method_id, req_path) = match path_data_opt {
|
|
None => {
|
|
return Ok(create_json_response(
|
|
r#"{"error":"Riot API endpoint method not found."}"#,
|
|
StatusCode::NOT_FOUND,
|
|
))
|
|
}
|
|
Some(path_data) => path_data,
|
|
};
|
|
|
|
log::debug!(
|
|
"Request to route {:?}, method ID {:?}: {} {:?}.",
|
|
route,
|
|
method_id,
|
|
method,
|
|
req_path
|
|
);
|
|
|
|
// Convert http:request::Parts from hyper to reqwest's RequestBuilder.
|
|
let body = match hyper::body::to_bytes(body).await {
|
|
Err(err) => {
|
|
log::info!("Error handling request body: {:#?}", err);
|
|
return Ok(create_json_response(
|
|
r#"{"error":"Failed to handle request body."}"#,
|
|
StatusCode::BAD_REQUEST,
|
|
));
|
|
}
|
|
Ok(bytes) => bytes,
|
|
};
|
|
|
|
let req_builder = RIOT_API.request(method, route.into(), req_path).body(body);
|
|
|
|
// Send request to Riot API.
|
|
let resp_result = RIOT_API
|
|
.execute_raw(method_id, route.into(), req_builder)
|
|
.await;
|
|
let resp_info = match resp_result {
|
|
Err(err) => {
|
|
log::info!("Riot API error: {:#?}", err.source_reqwest_error());
|
|
return Ok(create_json_response(
|
|
r#"{"error":"Riot API request failed."}"#,
|
|
StatusCode::INTERNAL_SERVER_ERROR,
|
|
));
|
|
}
|
|
Ok(resp_info) => resp_info,
|
|
};
|
|
|
|
// Write output.
|
|
let api_response = resp_info.response;
|
|
let mut out_response = Response::default();
|
|
*out_response.headers_mut() = api_response.headers().clone();
|
|
|
|
// If None, write "null" to body to be extra nice.
|
|
if resp_info.status_none {
|
|
*out_response.body_mut() = Body::from("null");
|
|
}
|
|
// Otherwise copy body.
|
|
else {
|
|
*out_response.status_mut() = api_response.status();
|
|
|
|
// Using streams would be faster.
|
|
let bytes_result = api_response.bytes().await;
|
|
let bytes = match bytes_result {
|
|
Err(_err) => {
|
|
return Ok(create_json_response(
|
|
r#"{"error":"Failed to get body from Riot API response."}"#,
|
|
StatusCode::INTERNAL_SERVER_ERROR,
|
|
))
|
|
}
|
|
Ok(bytes) => bytes,
|
|
};
|
|
*out_response.body_mut() = Body::from(bytes);
|
|
}
|
|
Ok(out_response)
|
|
}
|
|
|
|
/// Gets the region, method_id, and Riot API path based on the given http method and path.
|
|
fn parse_path<'a>(
|
|
http_method: &Method,
|
|
req_path: &'a str,
|
|
) -> Option<(Route, &'static str, &'a str)> {
|
|
// Split URI into region and rest of path.
|
|
let req_path = req_path.trim_start_matches('/');
|
|
let (route, req_path) = req_path.split_at(req_path.find('/')?);
|
|
let route: Route = route.to_uppercase().parse().ok()?;
|
|
|
|
// Find method_id for given path.
|
|
let method_id = find_matching_method_id(http_method, req_path)?;
|
|
|
|
Some((route, method_id, req_path))
|
|
}
|
|
|
|
/// Finds the method_id given the request path.
|
|
fn find_matching_method_id(http_method: &Method, req_path: &str) -> Option<&'static str> {
|
|
for (endpoint_http_method, ref_path, method_id) in &riven::meta::ALL_ENDPOINTS {
|
|
if http_method == endpoint_http_method && paths_match(ref_path, req_path) {
|
|
return Some(method_id);
|
|
}
|
|
}
|
|
None
|
|
}
|
|
|
|
/// Checks if the request path (req_path) matches the reference path (ref_path).
|
|
fn paths_match(ref_path: &str, req_path: &str) -> bool {
|
|
let mut ref_iter = ref_path.split('/');
|
|
let mut req_iter = req_path.split('/');
|
|
loop {
|
|
match (ref_iter.next(), req_iter.next()) {
|
|
(None, None) => return true,
|
|
(Some(ref_seg), Some(req_seg)) => {
|
|
if ref_seg.starts_with('{') || ref_seg == req_seg {
|
|
continue;
|
|
}
|
|
return false;
|
|
}
|
|
_ => return false,
|
|
}
|
|
}
|
|
}
|
|
|
|
#[tokio::main]
|
|
pub async fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
|
|
// Setup loggers.
|
|
// env_logger::init();
|
|
tracing_subscriber::fmt::init();
|
|
|
|
// Trigger lazy_static.
|
|
let _ = &*RIOT_API;
|
|
|
|
// For every connection, we must make a `Service` to handle all
|
|
// incoming HTTP requests on said connection.
|
|
let make_svc = make_service_fn(|_conn| {
|
|
// This is the `Service` that will handle the connection.
|
|
// `service_fn` is a helper to convert a function that
|
|
// returns a Response into a `Service`.
|
|
async { Ok::<_, Infallible>(service_fn(handle_request)) }
|
|
});
|
|
|
|
let addr = ([127, 0, 0, 1], 3000).into();
|
|
|
|
let server = Server::bind(&addr).serve(make_svc);
|
|
|
|
log::info!("Listening on http://{}", addr);
|
|
|
|
server.await?;
|
|
|
|
Ok(())
|
|
}
|