refactor Resolver service

examples/basic.rs

@@ -80,8 +80,7 @@ fn main() {
                     future::ok(())
                 })
             },
-        )
+        ).unwrap()
-        .unwrap()
         .start();
 
     sys.run();

examples/ssl.rs

@@ -24,7 +24,8 @@ struct ServiceState {
 }
 
 fn service<T: AsyncRead + AsyncWrite>(
-    st: &mut ServiceState, _: T,
+    st: &mut ServiceState,
+    _: T,
 ) -> impl Future<Item = (), Error = ()> {
     let num = st.num.fetch_add(1, Ordering::Relaxed);
     println!("got ssl connection {:?}", num);
@@ -60,8 +61,7 @@ fn main() {
                     println!("got ssl connection {:?}", num);
                     future::ok(())
                 })
-        })
+        }).unwrap()
-        .unwrap()
         .start();
 
     sys.run();

src/codec/framed.rs

@@ -176,7 +176,8 @@ where
     type SinkError = U::Error;
 
     fn start_send(
-        &mut self, item: Self::SinkItem,
+        &mut self,
+        item: Self::SinkItem,
     ) -> StartSend<Self::SinkItem, Self::SinkError> {
         self.inner.get_mut().start_send(item)
     }

src/codec/framed2.rs

@@ -191,7 +191,8 @@ where
     type SinkError = E::Error;
 
     fn start_send(
-        &mut self, item: Self::SinkItem,
+        &mut self,
+        item: Self::SinkItem,
     ) -> StartSend<Self::SinkItem, Self::SinkError> {
         self.inner.get_mut().start_send(item)
     }

src/codec/framed_read.rs

@@ -98,7 +98,8 @@ where
     type SinkError = T::SinkError;
 
     fn start_send(
-        &mut self, item: Self::SinkItem,
+        &mut self,
+        item: Self::SinkItem,
     ) -> StartSend<Self::SinkItem, Self::SinkError> {
         self.inner.inner.0.start_send(item)
     }

src/codec/framed_write.rs

@@ -197,8 +197,7 @@ where
                     io::ErrorKind::WriteZero,
                     "failed to \
                      write frame to transport",
-                )
+                ).into());
-                .into());
             }
 
             // TODO: Add a way to `bytes` to do this w/o returning the drained

src/connector.rs

@@ -11,7 +11,7 @@ use tokio_tcp::{ConnectFuture, TcpStream};
 use trust_dns_resolver::config::{ResolverConfig, ResolverOpts};
 use trust_dns_resolver::system_conf::read_system_conf;
 
-use super::resolver::{HostAware, Resolver, ResolverError, ResolverFuture};
+use super::resolver::{HostAware, ResolveError, Resolver, ResolverFuture};
 use super::service::{NewService, Service};
 
 // #[derive(Fail, Debug)]
@@ -19,9 +19,9 @@ use super::service::{NewService, Service};
 pub enum ConnectorError {
     /// Failed to resolve the hostname
     // #[fail(display = "Failed resolving hostname: {}", _0)]
-    Resolver(ResolverError),
+    Resolver(ResolveError),
 
-    /// Not dns records
+    /// No dns records
     // #[fail(display = "Invalid input: {}", _0)]
     NoRecords,
 
@@ -29,17 +29,21 @@ pub enum ConnectorError {
     // #[fail(display = "Timeout out while establishing connection")]
     Timeout,
 
+    /// Invalid input
+    InvalidInput,
+
     /// Connection io error
     // #[fail(display = "{}", _0)]
     IoError(io::Error),
 }
 
-impl From<ResolverError> for ConnectorError {
+impl From<ResolveError> for ConnectorError {
-    fn from(err: ResolverError) -> Self {
+    fn from(err: ResolveError) -> Self {
         ConnectorError::Resolver(err)
     }
 }
 
+/// Connect request
 #[derive(Eq, PartialEq, Debug, Hash)]
 pub struct Connect {
     pub host: String,
@@ -48,6 +52,7 @@ pub struct Connect {
 }
 
 impl Connect {
+    /// Create new `Connect` instance.
     pub fn new<T: AsRef<str>>(host: T, port: u16) -> Connect {
         Connect {
             port,
@@ -56,20 +61,19 @@ impl Connect {
         }
     }
 
-    /// split the string by ':' and convert the second part to u16
+    /// Create `Connect` instance by spliting the string by ':' and convert the second part to u16
-    pub fn parse<T: AsRef<str>>(host: T) -> Option<Connect> {
+    pub fn with<T: AsRef<str>>(host: T) -> Result<Connect, ConnectorError> {
         let mut parts_iter = host.as_ref().splitn(2, ':');
-        if let Some(host) = parts_iter.next() {
+        let host = parts_iter.next().ok_or(ConnectorError::InvalidInput)?;
-            let port_str = parts_iter.next().unwrap_or("");
+        let port_str = parts_iter.next().unwrap_or("");
-            if let Ok(port) = port_str.parse::<u16>() {
+        let port = port_str
-                return Some(Connect {
+            .parse::<u16>()
-                    port,
+            .map_err(|_| ConnectorError::InvalidInput)?;
-                    host: host.to_owned(),
+        Ok(Connect {
-                    timeout: Duration::from_secs(1),
+            port,
-                });
+            host: host.to_owned(),
-            }
+            timeout: Duration::from_secs(1),
-        }
+        })
-        None
     }
 
     /// Set connect timeout
@@ -93,6 +97,7 @@ impl fmt::Display for Connect {
     }
 }
 
+/// Tcp connector
 pub struct Connector {
     resolver: Resolver<Connect>,
 }
@@ -110,12 +115,14 @@ impl Default for Connector {
 }
 
 impl Connector {
+    /// Create new connector with resolver configuration
     pub fn new(cfg: ResolverConfig, opts: ResolverOpts) -> Self {
         Connector {
             resolver: Resolver::new(cfg, opts),
         }
     }
 
+    /// Create new connector with custom resolver
     pub fn with_resolver(
         resolver: Resolver<Connect>,
     ) -> impl Service<Request = Connect, Response = (Connect, TcpStream), Error = ConnectorError>
@@ -123,17 +130,10 @@ impl Connector {
         Connector { resolver }
     }
 
-    pub fn new_service<E>() -> impl NewService<
+    /// Create new default connector service
-        Request = Connect,
-        Response = (Connect, TcpStream),
-        Error = ConnectorError,
-        InitError = E,
-    > + Clone {
-        || -> FutureResult<Connector, E> { ok(Connector::default()) }
-    }
-
     pub fn new_service_with_config<E>(
-        cfg: ResolverConfig, opts: ResolverOpts,
+        cfg: ResolverConfig,
+        opts: ResolverOpts,
     ) -> impl NewService<
         Request = Connect,
         Response = (Connect, TcpStream),
@@ -185,19 +185,14 @@ impl Future for ConnectorFuture {
             return fut.poll();
         }
         match self.fut.poll().map_err(ConnectorError::from)? {
-            Async::Ready((req, _, mut addrs)) => {
+            Async::Ready((req, mut addrs)) => {
                 if addrs.is_empty() {
                     Err(ConnectorError::NoRecords)
                 } else {
                     for addr in &mut addrs {
                         match addr {
-                            SocketAddr::V4(ref mut addr) if addr.port() == 0 => {
+                            SocketAddr::V4(ref mut addr) => addr.set_port(req.port),
-                                addr.set_port(req.port)
+                            SocketAddr::V6(ref mut addr) => addr.set_port(req.port),
-                            }
-                            SocketAddr::V6(ref mut addr) if addr.port() == 0 => {
-                                addr.set_port(req.port)
-                            }
-                            _ => (),
                         }
                     }
                     self.fut2 = Some(TcpConnector::new(req, addrs));

src/lib.rs

@@ -9,7 +9,10 @@
 
 #![cfg_attr(
     feature = "cargo-clippy",
-    allow(declare_interior_mutable_const, borrow_interior_mutable_const)
+    allow(
+        declare_interior_mutable_const,
+        borrow_interior_mutable_const
+    )
 )]
 
 #[macro_use]

src/resolver.rs

@@ -6,19 +6,13 @@ use futures::{Async, Future, Poll};
 
 use tokio_current_thread::spawn;
 use trust_dns_resolver::config::{ResolverConfig, ResolverOpts};
-use trust_dns_resolver::error::ResolveError;
+pub use trust_dns_resolver::error::ResolveError;
 use trust_dns_resolver::lookup_ip::LookupIpFuture;
 use trust_dns_resolver::system_conf::read_system_conf;
 use trust_dns_resolver::{AsyncResolver, Background};
 
 use super::service::Service;
 
-#[derive(Debug)]
-pub enum ResolverError {
-    Resolve(ResolveError),
-    InvalidInput,
-}
-
 pub trait HostAware {
     fn host(&self) -> &str;
 }
@@ -75,8 +69,8 @@ impl<T> Clone for Resolver<T> {
 
 impl<T: HostAware> Service for Resolver<T> {
     type Request = T;
-    type Response = (T, String, VecDeque<SocketAddr>);
+    type Response = (T, VecDeque<SocketAddr>);
-    type Error = ResolverError;
+    type Error = ResolveError;
     type Future = ResolverFuture<T>;
 
     fn poll_ready(&mut self) -> Poll<(), Self::Error> {
@@ -84,7 +78,7 @@ impl<T: HostAware> Service for Resolver<T> {
     }
 
     fn call(&mut self, req: Self::Request) -> Self::Future {
-        ResolverFuture::new(req, 0, &self.resolver)
+        ResolverFuture::new(req, &self.resolver)
     }
 }
 
@@ -92,78 +86,38 @@ impl<T: HostAware> Service for Resolver<T> {
 /// Resolver future
 pub struct ResolverFuture<T> {
     req: Option<T>,
-    port: u16,
     lookup: Option<Background<LookupIpFuture>>,
     addrs: Option<VecDeque<SocketAddr>>,
-    error: Option<ResolverError>,
-    host: Option<String>,
 }
 
 impl<T: HostAware> ResolverFuture<T> {
-    pub fn new(addr: T, port: u16, resolver: &AsyncResolver) -> Self {
+    pub fn new(addr: T, resolver: &AsyncResolver) -> Self {
         // we need to do dns resolution
-        match ResolverFuture::<T>::parse(addr.host(), port) {
+        let lookup = Some(resolver.lookup_ip(addr.host()));
-            Ok((host, port)) => {
+        ResolverFuture {
-                let lookup = Some(resolver.lookup_ip(host.as_str()));
+            lookup,
-                ResolverFuture {
+            req: Some(addr),
-                    port,
+            addrs: None,
-                    lookup,
-                    req: Some(addr),
-                    host: Some(host.to_owned()),
-                    addrs: None,
-                    error: None,
-                }
-            }
-            Err(err) => ResolverFuture {
-                port,
-                req: None,
-                host: None,
-                lookup: None,
-                addrs: None,
-                error: Some(err),
-            },
         }
     }
-
-    fn parse(addr: &str, port: u16) -> Result<(String, u16), ResolverError> {
-        // split the string by ':' and convert the second part to u16
-        let mut parts_iter = addr.splitn(2, ':');
-        let host = parts_iter.next().ok_or(ResolverError::InvalidInput)?;
-        let port_str = parts_iter.next().unwrap_or("");
-        let port: u16 = port_str.parse().unwrap_or(port);
-
-        Ok((host.to_owned(), port))
-    }
 }
 
 impl<T: HostAware> Future for ResolverFuture<T> {
-    type Item = (T, String, VecDeque<SocketAddr>);
+    type Item = (T, VecDeque<SocketAddr>);
-    type Error = ResolverError;
+    type Error = ResolveError;
 
     fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
-        if let Some(err) = self.error.take() {
+        if let Some(addrs) = self.addrs.take() {
-            Err(err)
+            Ok(Async::Ready((self.req.take().unwrap(), addrs)))
-        } else if let Some(addrs) = self.addrs.take() {
-            Ok(Async::Ready((
-                self.req.take().unwrap(),
-                self.host.take().unwrap(),
-                addrs,
-            )))
         } else {
             match self.lookup.as_mut().unwrap().poll() {
                 Ok(Async::NotReady) => Ok(Async::NotReady),
                 Ok(Async::Ready(ips)) => {
-                    let addrs: VecDeque<_> = ips
+                    let addrs: VecDeque<_> =
-                        .iter()
+                        ips.iter().map(|ip| SocketAddr::new(ip, 0)).collect();
-                        .map(|ip| SocketAddr::new(ip, self.port))
+                    Ok(Async::Ready((self.req.take().unwrap(), addrs)))
-                        .collect();
-                    Ok(Async::Ready((
-                        self.req.take().unwrap(),
-                        self.host.take().unwrap(),
-                        addrs,
-                    )))
                 }
-                Err(err) => Err(ResolverError::Resolve(err)),
+                Err(err) => Err(err),
             }
         }
     }

src/server/accept.rs

@@ -87,7 +87,9 @@ impl AcceptLoop {
     }
 
     pub(crate) fn start(
-        &mut self, socks: Vec<(Token, net::TcpListener)>, workers: Vec<WorkerClient>,
+        &mut self,
+        socks: Vec<(Token, net::TcpListener)>,
+        workers: Vec<WorkerClient>,
     ) -> mpsc::UnboundedReceiver<ServerCommand> {
         let (tx, rx) = self.srv.take().expect("Can not re-use AcceptInfo");
 
@@ -135,9 +137,12 @@ fn connection_error(e: &io::Error) -> bool {
 impl Accept {
     #![cfg_attr(feature = "cargo-clippy", allow(too_many_arguments))]
     pub(crate) fn start(
-        rx: sync_mpsc::Receiver<Command>, cmd_reg: mio::Registration,
+        rx: sync_mpsc::Receiver<Command>,
-        notify_reg: mio::Registration, socks: Vec<(Token, net::TcpListener)>,
+        cmd_reg: mio::Registration,
-        srv: mpsc::UnboundedSender<ServerCommand>, workers: Vec<WorkerClient>,
+        notify_reg: mio::Registration,
+        socks: Vec<(Token, net::TcpListener)>,
+        srv: mpsc::UnboundedSender<ServerCommand>,
+        workers: Vec<WorkerClient>,
     ) {
         let sys = System::current();
 
@@ -173,8 +178,10 @@ impl Accept {
     }
 
     fn new(
-        rx: sync_mpsc::Receiver<Command>, socks: Vec<(Token, net::TcpListener)>,
+        rx: sync_mpsc::Receiver<Command>,
-        workers: Vec<WorkerClient>, srv: mpsc::UnboundedSender<ServerCommand>,
+        socks: Vec<(Token, net::TcpListener)>,
+        workers: Vec<WorkerClient>,
+        srv: mpsc::UnboundedSender<ServerCommand>,
     ) -> Accept {
         // Create a poll instance
         let poll = match mio::Poll::new() {

src/server/server.rs

@@ -137,7 +137,10 @@ impl Server {
 
     /// Add new service to server
     pub fn listen<F, N: AsRef<str>>(
-        mut self, name: N, lst: net::TcpListener, factory: F,
+        mut self,
+        name: N,
+        lst: net::TcpListener,
+        factory: F,
     ) -> Self
     where
         F: StreamServiceFactory,
@@ -151,7 +154,10 @@ impl Server {
 
     /// Add new service to server
     pub fn listen2<F, N: AsRef<str>>(
-        mut self, name: N, lst: net::TcpListener, factory: F,
+        mut self,
+        name: N,
+        lst: net::TcpListener,
+        factory: F,
     ) -> Self
     where
         F: ServiceFactory,

src/server/worker.rs

@@ -61,7 +61,9 @@ pub(crate) struct WorkerClient {
 
 impl WorkerClient {
     pub fn new(
-        idx: usize, tx: UnboundedSender<WorkerCommand>, avail: WorkerAvailability,
+        idx: usize,
+        tx: UnboundedSender<WorkerCommand>,
+        avail: WorkerAvailability,
     ) -> Self {
         WorkerClient { idx, tx, avail }
     }
@@ -128,8 +130,10 @@ pub(crate) struct Worker {
 
 impl Worker {
     pub(crate) fn start(
-        rx: UnboundedReceiver<WorkerCommand>, factories: Vec<Box<InternalServiceFactory>>,
+        rx: UnboundedReceiver<WorkerCommand>,
-        availability: WorkerAvailability, shutdown_timeout: time::Duration,
+        factories: Vec<Box<InternalServiceFactory>>,
+        availability: WorkerAvailability,
+        shutdown_timeout: time::Duration,
     ) {
         availability.set(false);
         let mut wrk = MAX_CONNS_COUNTER.with(|conns| Worker {
@@ -151,8 +155,7 @@ impl Worker {
                 .map_err(|e| {
                     error!("Can not start worker: {:?}", e);
                     Arbiter::current().do_send(StopArbiter(0));
-                })
+                }).and_then(move |services| {
-                .and_then(move |services| {
                     wrk.services.extend(services);
                     wrk
                 }),

src/service/mod.rs

@@ -27,7 +27,9 @@ pub trait ServiceExt: Service {
     /// Apply function to specified service and use it as a next service in
     /// chain.
     fn apply<S, I, F, R>(
-        self, service: I, f: F,
+        self,
+        service: I,
+        f: F,
     ) -> AndThen<Self, Apply<S, F, R, Self::Response>>
     where
         Self: Sized,
@@ -120,7 +122,9 @@ pub trait ServiceExt: Service {
 
 pub trait NewServiceExt: NewService {
     fn apply<S, I, F, R>(
-        self, service: I, f: F,
+        self,
+        service: I,
+        f: F,
     ) -> AndThenNewService<Self, ApplyNewService<S, F, R, Self::Response>>
     where
         Self: Sized,

src/timeout.rs

@@ -1,4 +1,4 @@
-//! Tower middleware that applies a timeout to requests.
+//! Service that applies a timeout to requests.
 //!
 //! If the response does not complete within the specified timeout, the response
 //! will be aborted.
@@ -34,13 +34,6 @@ impl<E: fmt::Debug> fmt::Debug for TimeoutError<E> {
     }
 }
 
-/// `Timeout` response future
-#[derive(Debug)]
-pub struct TimeoutFut<T: NewService> {
-    fut: T::Future,
-    timeout: Duration,
-}
-
 impl<T> Timeout<T>
 where
     T: NewService + Clone,
@@ -69,6 +62,13 @@ where
     }
 }
 
+/// `Timeout` response future
+#[derive(Debug)]
+pub struct TimeoutFut<T: NewService> {
+    fut: T::Future,
+    timeout: Duration,
+}
+
 impl<T> Future for TimeoutFut<T>
 where
     T: NewService,