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use std::convert::TryFrom;
use std::future::Future;
use std::pin::Pin;
use std::sync::Arc;
use std::task::{Context, Poll};
use std::{fmt, io};
use hyper::{client::connect::Connection, service::Service, Uri};
use tokio::io::{AsyncRead, AsyncWrite};
use tokio_rustls::TlsConnector;
use crate::stream::MaybeHttpsStream;
pub mod builder;
type BoxError = Box<dyn std::error::Error + Send + Sync>;
#[derive(Clone)]
pub struct HttpsConnector<T> {
force_https: bool,
http: T,
tls_config: Arc<rustls::ClientConfig>,
override_server_name: Option<String>,
}
impl<T> fmt::Debug for HttpsConnector<T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("HttpsConnector")
.field("force_https", &self.force_https)
.finish()
}
}
impl<H, C> From<(H, C)> for HttpsConnector<H>
where
C: Into<Arc<rustls::ClientConfig>>,
{
fn from((http, cfg): (H, C)) -> Self {
HttpsConnector {
force_https: false,
http,
tls_config: cfg.into(),
override_server_name: None,
}
}
}
impl<T> Service<Uri> for HttpsConnector<T>
where
T: Service<Uri>,
T::Response: Connection + AsyncRead + AsyncWrite + Send + Unpin + 'static,
T::Future: Send + 'static,
T::Error: Into<BoxError>,
{
type Response = MaybeHttpsStream<T::Response>;
type Error = BoxError;
#[allow(clippy::type_complexity)]
type Future =
Pin<Box<dyn Future<Output = Result<MaybeHttpsStream<T::Response>, BoxError>> + Send>>;
fn poll_ready(&mut self, cx: &mut Context<'_>) -> Poll<Result<(), Self::Error>> {
match self.http.poll_ready(cx) {
Poll::Ready(Ok(())) => Poll::Ready(Ok(())),
Poll::Ready(Err(e)) => Poll::Ready(Err(e.into())),
Poll::Pending => Poll::Pending,
}
}
fn call(&mut self, dst: Uri) -> Self::Future {
if let Some(sch) = dst.scheme() {
if sch == &http::uri::Scheme::HTTP && !self.force_https {
let connecting_future = self.http.call(dst);
let f = async move {
let tcp = connecting_future
.await
.map_err(Into::into)?;
Ok(MaybeHttpsStream::Http(tcp))
};
Box::pin(f)
} else if sch == &http::uri::Scheme::HTTPS {
let cfg = self.tls_config.clone();
let mut hostname = match self.override_server_name.as_deref() {
Some(h) => h,
None => dst.host().unwrap_or_default(),
};
if let Some(trimmed) = hostname
.strip_prefix('[')
.and_then(|h| h.strip_suffix(']'))
{
hostname = trimmed;
}
let hostname = match rustls::ServerName::try_from(hostname) {
Ok(dnsname) => dnsname,
Err(_) => {
let err = io::Error::new(io::ErrorKind::Other, "invalid dnsname");
return Box::pin(async move { Err(Box::new(err).into()) });
}
};
let connecting_future = self.http.call(dst);
let f = async move {
let tcp = connecting_future
.await
.map_err(Into::into)?;
let connector = TlsConnector::from(cfg);
let tls = connector
.connect(hostname, tcp)
.await
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
Ok(MaybeHttpsStream::Https(tls))
};
Box::pin(f)
} else {
let err =
io::Error::new(io::ErrorKind::Other, format!("Unsupported scheme {}", sch));
Box::pin(async move { Err(err.into()) })
}
} else {
let err = io::Error::new(io::ErrorKind::Other, "Missing scheme");
Box::pin(async move { Err(err.into()) })
}
}
}