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|
use super::{signature::validate_signature, types::Interaction};
use crate::config::Config;
use hyper::{
body::{to_bytes, Bytes},
service::Service,
Body, Method, Request, Response, StatusCode,
};
use log::{error, info, trace};
use nats::Connection;
use serde::{Deserialize, Serialize};
use std::{
future::Future,
io::{Error, ErrorKind},
pin::Pin,
str::from_utf8,
sync::Arc,
task::{Context, Poll},
};
/// Hyper service used to handle the discord webhooks
#[derive(Clone)]
pub struct HandlerService {
pub config: Arc<Config>,
pub nats: Arc<Connection>,
}
impl HandlerService {
async fn check_request(&self, req: Request<Body>) -> Result<Bytes, Error> {
if req.method() == Method::POST {
let headers = req.headers().clone();
let signature = headers.get("X-Signature-Ed25519");
let timestamp = headers.get("X-Signature-Timestamp");
if let (Some(timestamp), Some(signature)) = (timestamp, signature) {
if let Ok(data) = to_bytes(req.into_body()).await {
let contatenated_data = [timestamp.as_bytes().to_vec(), data.to_vec()].concat();
if let Ok(signature_str) = &signature.to_str() {
if validate_signature(
&self.config.discord.public_key,
&contatenated_data,
signature_str,
) {
Ok(data)
} else {
Err(Error::new(
ErrorKind::InvalidData,
"invalid signature specified",
))
}
} else {
Err(Error::new(
ErrorKind::BrokenPipe,
"failed to read signature",
))
}
} else {
Err(Error::new(ErrorKind::BrokenPipe, "unable to read body"))
}
} else {
Err(Error::new(ErrorKind::InvalidData, "missing headers"))
}
} else {
Err(Error::new(ErrorKind::InvalidData, "invalid method"))
}
}
}
#[derive(Debug, Serialize, Deserialize)]
pub struct Ping {
#[serde(rename = "type")]
t: i32,
}
/// Implementation of the service
impl Service<Request<Body>> for HandlerService {
type Response = Response<Body>;
type Error = hyper::Error;
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send>>;
fn poll_ready(&mut self, _: &mut Context) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, req: Request<Body>) -> Self::Future {
let self_clone = self.clone();
Box::pin(async move {
match self_clone.check_request(req).await {
Ok(data) => {
let value: Interaction =
serde_json::from_str(from_utf8(&data).unwrap()).unwrap();
trace!("received value: {:?}", value);
match value.t {
1 => {
info!("sending pong");
// a ping must be responded with another ping
return Ok(Response::builder()
.header("Content-Type", "application/json")
.body(serde_json::to_string(&Ping { t: 1 }).unwrap().into())
.unwrap());
}
_ => {
let payload = serde_json::to_string(&common::payloads::CachePayload {
tracing: common::payloads::Tracing {
node_id: "".to_string(),
span: None,
},
data: value,
})
.unwrap();
match self_clone
.nats
.request("nova.cache.dispatch.interaction", payload)
{
Ok(response) => Ok(Response::builder()
.header("Content-Type", "application/json")
.body(from_utf8(&response.data).unwrap().to_string().into())
.unwrap()),
Err(error) => {
error!("failed to request nats: {}", error);
Ok(Response::builder()
.status(500)
.body("an internal server error occured".to_string().into())
.unwrap())
}
}
}
}
}
Err(error) => Ok(Response::builder()
.status(StatusCode::UNAUTHORIZED)
.body(error.to_string().into())
.unwrap()),
}
})
}
}
|
