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use core::future::Future;
use core::task::{Context, Poll};
use std::convert::TryFrom;
use std::io;
use std::pin::Pin;
use std::sync::Arc;
use futures_util::future::*;
use hyper::client::connect::Connection;
use hyper::client::HttpConnector;
use hyper::service::Service;
use hyper::Uri;
use hyper_rustls::MaybeHttpsStream;
use rustls::ServerName;
use tokio::io::{AsyncRead, AsyncWrite};
use tokio_rustls::TlsConnector;
#[derive(Clone)]
pub struct HttpsConnectorFixedDnsname<T> {
http: T,
tls_config: Arc<rustls::ClientConfig>,
fixed_dnsname: &'static str,
}
type BoxError = Box<dyn std::error::Error + Send + Sync>;
impl HttpsConnectorFixedDnsname<HttpConnector> {
pub fn new(
mut tls_config: rustls::ClientConfig,
fixed_dnsname: &'static str,
mut http: HttpConnector,
) -> Self {
http.enforce_http(false);
tls_config.alpn_protocols = vec![b"http/1.1".to_vec()];
Self {
http,
tls_config: Arc::new(tls_config),
fixed_dnsname,
}
}
}
impl<T> Service<Uri> for HttpsConnectorFixedDnsname<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 {
let is_https = dst.scheme_str() == Some("https");
assert!(is_https);
let cfg = self.tls_config.clone();
let connecting_future = self.http.call(dst);
let dnsname = ServerName::try_from(self.fixed_dnsname).expect("Invalid fixed dnsname");
let f = async move {
let tcp = connecting_future.await.map_err(Into::into)?;
let connector = TlsConnector::from(cfg);
let tls = connector
.connect(dnsname, tcp)
.await
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?;
Ok(MaybeHttpsStream::Https(tls))
};
f.boxed()
}
}
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