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|
use super::error::WebhookError;
use super::{signature::validate_signature, types::Interaction};
use crate::config::Config;
use common::log::{debug, error, info};
use common::nats_crate::Connection;
use hyper::{
body::{to_bytes, Bytes},
service::Service,
Body, Method, Request, Response, StatusCode,
};
use serde::{Deserialize, Serialize};
use std::{
future::Future,
pin::Pin,
str::from_utf8,
sync::Arc,
task::{Context, Poll},
time::Duration,
};
/// 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, WebhookError> {
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(WebhookError::new(
StatusCode::UNAUTHORIZED,
"invalid signature",
))
}
} else {
Err(WebhookError::new(
StatusCode::BAD_REQUEST,
"failed to read signature",
))
}
} else {
Err(WebhookError::new(
StatusCode::BAD_REQUEST,
"unable to read body",
))
}
} else {
Err(WebhookError::new(
StatusCode::UNAUTHORIZED,
"missing signature headers",
))
}
} else {
Err(WebhookError::new(StatusCode::NOT_FOUND, "not found"))
}
}
async fn process_request(
&mut self,
req: Request<Body>,
) -> Result<Response<Body>, WebhookError> {
match self.check_request(req).await {
Ok(data) => {
let utf8 = from_utf8(&data);
match utf8 {
Ok(data) => match serde_json::from_str::<Interaction>(data) {
Ok(value) => {
if 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());
} else {
debug!("calling nats");
// this should hopefully not fail ?
let payload =
serde_json::to_string(&common::payloads::CachePayload {
tracing: common::payloads::Tracing {
node_id: "".to_string(),
span: None,
},
operation: "".to_string(),
data: value,
})
.unwrap();
match self.nats.request_timeout(
"nova.cache.dispatch.interaction",
payload,
Duration::from_secs(2),
) {
Ok(response) => Ok(Response::builder()
.header("Content-Type", "application/json")
.body(Body::from(response.data))
.unwrap()),
Err(error) => {
error!("failed to request nats: {}", error);
Err(WebhookError::new(
StatusCode::INTERNAL_SERVER_ERROR,
"failed to request nats",
))
}
}
}
}
Err(_) => Err(WebhookError::new(
StatusCode::BAD_REQUEST,
"invalid json body",
)),
},
Err(_) => Err(WebhookError::new(StatusCode::BAD_REQUEST, "not utf-8 body")),
}
}
Err(error) => Err(error),
}
}
}
#[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 mut clone = self.clone();
Box::pin(async move {
let response = clone.process_request(req).await;
match response {
Ok(r) => Ok(r),
Err(e) => Ok(e.into()),
}
})
}
}
|
