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use core::{
pin::Pin,
task::{Context, Poll},
};
use failure::Error;
use futures_util::future::FutureExt;
use futures_util::try_future::TryFutureExt;
use hex::FromHex;
use std::borrow::Cow;
use std::future::Future;
use std::path::Path;
#[derive(Debug)]
pub struct Uri<'a> {
encoded: Cow<'a, str>,
}
impl<'a> Into<hyper::Uri> for Uri<'a> {
fn into(self) -> hyper::Uri {
self.encoded.as_ref().parse().unwrap()
}
}
impl<'a> Uri<'a> {
pub fn new<P>(socket: P, path: &'a str) -> Self
where
P: AsRef<Path>,
{
let host = hex::encode(socket.as_ref().to_string_lossy().as_bytes());
let host_str = format!("unix://{}:0{}", host, path);
Uri {
encoded: Cow::Owned(host_str),
}
}
fn socket_path(uri: &hyper::Uri) -> Option<String> {
uri.host()
.iter()
.filter_map(|host| {
Vec::from_hex(host)
.ok()
.map(|raw| String::from_utf8_lossy(&raw).into_owned())
})
.next()
}
fn socket_path_dest(dest: &hyper::client::connect::Destination) -> Option<String> {
format!("unix://{}", dest.host())
.parse()
.ok()
.and_then(|uri| Self::socket_path(&uri))
}
}
pub struct UnixConnector(tokio::net::UnixListener);
impl From<tokio::net::UnixListener> for UnixConnector {
fn from(u: tokio::net::UnixListener) -> Self {
UnixConnector(u)
}
}
impl hyper::server::accept::Accept for UnixConnector {
type Conn = tokio::net::UnixStream;
type Error = Error;
fn poll_accept(
mut self: Pin<&mut Self>,
cx: &mut Context,
) -> Poll<Option<Result<Self::Conn, Self::Error>>> {
let fut = self
.0
.accept()
.map_ok(|(stream, _addr)| stream)
.map_err(|e| e.into())
.map(|f| Some(f));
Future::poll(Box::pin(fut).as_mut(), cx)
}
}
pub struct UnixClient;
impl hyper::client::connect::Connect for UnixClient {
type Transport = tokio::net::UnixStream;
type Error = Error;
type Future = Pin<
Box<
dyn Future<Output = Result<(Self::Transport, hyper::client::connect::Connected), Error>>
+ Send,
>,
>;
fn connect(&self, dst: hyper::client::connect::Destination) -> Self::Future {
Box::pin(async move {
if dst.scheme() != "unix" {
return Err(failure::format_err!("Invalid uri {:?}", dst));
}
let path = match Uri::socket_path_dest(&dst) {
Some(path) => path,
None => return Err(failure::format_err!("Invalid uri {:?}", dst)),
};
let st = tokio::net::UnixStream::connect(&path).await?;
Ok((st, hyper::client::connect::Connected::new()))
})
}
}
impl hyper::client::service::Service<hyper::Uri> for UnixClient {
type Response = tokio::net::UnixStream;
type Error = Error;
type Future = Pin<Box<dyn Future<Output = Result<Self::Response, Self::Error>> + Send + 'static>>;
fn poll_ready(&mut self, _cx: &mut Context) -> Poll<Result<(), Self::Error>> {
Poll::Ready(Ok(()))
}
fn call(&mut self, uri: hyper::Uri) -> Self::Future {
Box::pin(async move {
let dest = hyper::client::connect::Destination::try_from_uri(uri)?;
use hyper::client::connect::Connect;
let u = UnixClient;
let (uc, _) = u.connect(dest).await?;
Ok(uc)
})
}
}