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use std::path::PathBuf;
use std::process::{Child as ChildProcess, Command};
use std::rc::Rc;
use std::sync::Arc;
use hyper::http::uri::Scheme;
use hyper::{header, Body, Client, Request, Response};
use super::{async_trait, HttpHandler};
pub struct KillOnDrop(ChildProcess);
impl Drop for KillOnDrop {
fn drop(&mut self) {
self.0.kill().unwrap();
}
}
#[derive(Clone)]
pub struct ProxyChild {
process: Arc<KillOnDrop>,
port: u16,
}
impl ProxyChild {
pub fn new(command_line: String, in_dir: Option<PathBuf>, port: u16) -> Self {
let mut command_line = command_line.split(" ");
let command = command_line.next().unwrap();
let mut child = Command::new(command);
child.args(command_line);
if let Some(cwd) = in_dir {
child.current_dir(cwd);
}
let child = child.spawn().unwrap();
Self {
process: Arc::new(KillOnDrop(child)),
port: port as u16,
}
}
}
#[async_trait]
impl HttpHandler for ProxyChild {
async fn handle(&self, request: Request<Body>) -> Response<Body> {
let ProxyChild { port, .. } = self;
let mut request_uri = request.uri().clone().into_parts();
// TODO ipv6 loopback?
request_uri.authority = Some(format!("127.0.0.1:{}", port).parse().unwrap());
request_uri.scheme = Some(Scheme::HTTP);
let mut proxy_request = Request::builder()
.method(request.method())
.uri(request_uri)
.header(header::HOST, request.headers()[header::HOST].clone());
proxy_request.headers_mut().unwrap().extend(
request
.headers()
.iter()
.map(|(x, y)| (x.clone(), y.clone())),
);
// TODO handle nonempty body
let proxy_request = proxy_request.body(Body::empty()).unwrap();
let client = Client::new();
client.request(proxy_request).await.unwrap()
}
}
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