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#![deny(missing_docs)]
#![warn(rust_2018_idioms)]
#![doc(html_root_url = "https://docs.rs/amq-protocol-tcp/6.0.0-alpha1/")]
use amq_protocol_uri::{AMQPScheme, AMQPUri};
use log::{debug, trace};
use mio::{Events, Interest, Poll, Token};
use tcp_stream::HandshakeError;
use std::io;
pub use tcp_stream::{Identity, TcpStream};
pub trait AMQPUriTcpExt {
fn connect<S, F: FnOnce(TcpStream, AMQPUri, Option<(Poll, Token)>) -> S>(
self,
f: F,
) -> io::Result<S>
where
Self: Sized,
{
self.connect_full(f, None, None)
}
fn connect_full<S, F: FnOnce(TcpStream, AMQPUri, Option<(Poll, Token)>) -> S>(
self,
f: F,
poll: Option<(Poll, Token)>,
identity: Option<Identity<'_, '_>>,
) -> io::Result<S>;
}
impl AMQPUriTcpExt for AMQPUri {
fn connect_full<S, F: FnOnce(TcpStream, AMQPUri, Option<(Poll, Token)>) -> S>(
self,
f: F,
poll: Option<(Poll, Token)>,
identity: Option<Identity<'_, '_>>,
) -> io::Result<S> {
let uri = format!("{}:{}", self.authority.host, self.authority.port);
trace!("Connecting to {}", uri);
let mut stream = TcpStream::connect(uri)?;
if let Some((poll, token)) = poll.as_ref() {
trace!("Registering for mio events");
poll.registry().register(
&mut stream,
*token,
Interest::READABLE | Interest::WRITABLE,
)?;
}
match self.scheme {
AMQPScheme::AMQP => Ok((stream, poll)),
AMQPScheme::AMQPS => connect_amqps(stream, &self.authority.host, poll, identity),
}
.map(|(s, poll)| f(s, self, poll))
}
}
fn connect_amqps(
stream: TcpStream,
host: &str,
mut poll: Option<(Poll, Token)>,
identity: Option<Identity<'_, '_>>,
) -> io::Result<(TcpStream, Option<(Poll, Token)>)> {
trace!("Enabling TLS");
let mut events = Events::with_capacity(1024);
let mut res = stream.into_tls(host, identity);
while let Err(error) = res {
debug!("Got error when enabling TLS: {:?}", error);
match error {
HandshakeError::Failure(io_err) => return Err(io_err),
HandshakeError::WouldBlock(mid) => {
if let Some((poll, _)) = poll.as_mut() {
trace!("Waiting for mio events");
poll.poll(&mut events, None)?;
}
trace!("Retrying TLS");
res = mid.handshake()
}
};
}
trace!("TLS enabled");
Ok((res.unwrap(), poll))
}
impl AMQPUriTcpExt for &str {
fn connect_full<S, F: FnOnce(TcpStream, AMQPUri, Option<(Poll, Token)>) -> S>(
self,
f: F,
poll: Option<(Poll, Token)>,
identity: Option<Identity<'_, '_>>,
) -> io::Result<S> {
self.parse::<AMQPUri>()
.map_err(|e| io::Error::new(io::ErrorKind::Other, e))?
.connect_full(f, poll, identity)
}
}