// Copyright (C) 2023-2099 The crate authors.
//
// This program is free software: you can redistribute it and/or modify it
// under the terms of the GNU Affero General Public License as published by the
// Free Software Foundation, either version 3 of the License, or (at your
// option) any later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License
// for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see .
#![feature(let_chains)]
use std::convert::Infallible;
use std::error::Error as StdError;
use std::net::SocketAddr;
use std::str::{from_utf8, Utf8Error};
use gitlab::webhooks::WebHook;
use hyper::{
body, Body, header, Method, Request, Response, Server,
service::{make_service_fn, service_fn},
};
use log::{debug, error};
#[derive(Debug)]
enum Error {
MethodMismatch,
InvalidToken,
InvalidContentType,
Hyper(hyper::Error),
SerdeJson(serde_json::Error),
Utf8(Utf8Error),
}
impl StdError for Error {}
impl std::fmt::Display for Error {
fn fmt(&self, fmt: &mut std::fmt::Formatter) -> std::fmt::Result {
match self {
Error::MethodMismatch => write!(fmt, "the method is invalid"),
Error::InvalidToken => write!(fmt, "the token is invalid"),
Error::InvalidContentType => write!(fmt, "the content-type is invalid"),
Error::Hyper(e) => write!(fmt, "hyper error: {}", e),
Error::SerdeJson(e) => write!(fmt, "serde_json error: {}", e),
Error::Utf8(e) => write!(fmt, "Utf8 error: {}", e),
}
}
}
impl From for Error {
fn from(err: hyper::Error) -> Error {
Error::Hyper(err)
}
}
impl From for Error {
fn from(err: serde_json::Error) -> Error {
Error::SerdeJson(err)
}
}
impl From for Error {
fn from(err: Utf8Error) -> Error {
Error::Utf8(err)
}
}
fn error_res(e: E) -> Result, Infallible> {
error!("error response: {:?}", e);
let text = format!("{:?}", e);
let res = Response::builder()
.status(400)
.body(Body::from(Vec::from(text.as_bytes())))
.unwrap();
Ok(res)
}
async fn webhooks(req: Request) -> Result, Error> {
match req.method() {
&Method::POST => (),
_ => return Err(Error::MethodMismatch),
}
debug!("Headers: {:?}", req.headers());
let headers = req.headers();
if let Some(content_type) = headers.get(header::CONTENT_TYPE) &&
let Some(token) = headers.get("X-Gitlab-Token") {
if content_type != "application/json" {
return Err(Error::InvalidContentType);
}
if token != "secret" {
return Err(Error::InvalidToken);
}
}
let tmp = body::to_bytes(req.into_body()).await?;
let text: &str = from_utf8(&tmp)?;
let json: WebHook = serde_json::from_str(text)?;
debug!("Passed: {:?}", json);
Ok(Response::new("Hello world".into()))
}
async fn wrapper(req: Request) -> Result, Infallible> {
webhooks(req).await.or_else(error_res)
}
#[tokio::main]
async fn main() {
pretty_env_logger::init();
let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
let make_svc = make_service_fn(|_conn| async {
Ok::<_, Infallible>(service_fn(wrapper))
});
let server = Server::bind(&addr).serve(make_svc);
println!("Listening on http://{}", addr);
if let Err(e) = server.await {
eprintln!("Server error: {e}");
}
}