fix(server): Make sleep_on_errors configurable and use it in example

examples/hello.rs

@@ -19,7 +19,10 @@ fn main() {
  .with_body(PHRASE))
  }));
 
- let server = Http::new().bind(&addr, new_service).unwrap();
+ let server = Http::new()
+ .sleep_on_errors(true)
+ .bind(&addr, new_service)
+ .unwrap();
  println!("Listening on http://{} with 1 thread.", server.local_addr().unwrap());
  server.run().unwrap();
 }

src/server/mod.rs

@@ -664,6 +664,7 @@ impl Stream for AddrIncoming {
  type Error = ::std::io::Error;
 
  fn poll(&mut self) -> Poll<Option<Self::Item>, Self::Error> {
+ // Check if a previous timeout is active that was set by IO errors.
  if let Some(ref mut to) = self.timeout {
  match to.poll().expect("timeout never fails") {
  Async::Ready(_) => {}
@@ -682,8 +683,13 @@ impl Stream for AddrIncoming {
  return Ok(Async::Ready(Some(AddrStream::new(socket, addr))));
  },
  Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => return Ok(Async::NotReady),
- Err(ref e) if connection_error(e) => continue,
- Err(e) => {
+ Err(ref e) if self.sleep_on_errors => {
+ // Connection errors can be ignored directly, continue by
+ // accepting the next request.
+ if connection_error(e) {
+ continue;
+ }
+ // Sleep 10ms.
  let delay = ::std::time::Duration::from_millis(10);
  debug!("Accept error: {}. Sleeping {:?}...",
  e, delay);
@@ -698,7 +704,8 @@ impl Stream for AddrIncoming {
  return Ok(Async::NotReady);
  }
  }
- }
+ },
+ Err(e) => return Err(e),
  }
  }
  }