Refactor TLS handling

Signed-off-by: Alexey Galakhov <agalakhov@snapview.de>

src/client.rs

@@ -7,7 +7,52 @@ use std::io::{Read, Write};
 use url::Url;
 
 #[cfg(feature="tls")]
-use native_tls::{TlsStream, TlsConnector, HandshakeError as TlsHandshakeError};
+mod encryption {
+    use std::net::TcpStream;
+    use native_tls::{TlsConnector, HandshakeError as TlsHandshakeError};
+    pub use native_tls::TlsStream;
+
+    pub use stream::Stream as StreamSwitcher;
+    pub type AutoStream = StreamSwitcher<TcpStream, TlsStream<TcpStream>>;
+
+    use stream::Mode;
+    use error::Result;
+
+    pub fn wrap_stream(stream: TcpStream, domain: &str, mode: Mode) -> Result<AutoStream> {
+        match mode {
+            Mode::Plain => Ok(StreamSwitcher::Plain(stream)),
+            Mode::Tls => {
+                let connector = TlsConnector::builder()?.build()?;
+                connector.connect(domain, stream)
+                    .map_err(|e| match e {
+                        TlsHandshakeError::Failure(f) => f.into(),
+                        TlsHandshakeError::Interrupted(_) => panic!("Bug: TLS handshake not blocked"),
+                    })
+                    .map(|s| StreamSwitcher::Tls(s))
+            }
+        }
+    }
+}
+
+#[cfg(not(feature="tls"))]
+mod encryption {
+    use std::net::TcpStream;
+
+    use stream::Mode;
+    use error::{Error, Result};
+
+    pub type AutoStream = TcpStream;
+
+    pub fn wrap_stream(stream: TcpStream, _domain: &str, mode: Mode) -> Result<AutoStream> {
+        match mode {
+            Mode::Plain => Ok(stream),
+            Mode::Tls => Err(Error::Url("TLS support not compiled in.".into())),
+        }
+    }
+}
+
+pub use self::encryption::AutoStream;
+use self::encryption::wrap_stream;
 
 use protocol::WebSocket;
 use handshake::HandshakeError;
@@ -15,13 +60,6 @@ use handshake::client::{ClientHandshake, Request};
 use stream::Mode;
 use error::{Error, Result};
 
-#[cfg(feature="tls")]
-use stream::Stream as StreamSwitcher;
-
-#[cfg(feature="tls")]
-pub type AutoStream = StreamSwitcher<TcpStream, TlsStream<TcpStream>>;
-#[cfg(not(feature="tls"))]
-pub type AutoStream = TcpStream;
 
 /// Connect to the given WebSocket in blocking mode.
 ///
@@ -46,30 +84,6 @@ pub fn connect(url: Url) -> Result<WebSocket<AutoStream>> {
         })
 }
 
-#[cfg(feature="tls")]
-fn wrap_stream(stream: TcpStream, domain: &str, mode: Mode) -> Result<AutoStream> {
-    match mode {
-        Mode::Plain => Ok(StreamSwitcher::Plain(stream)),
-        Mode::Tls => {
-            let connector = TlsConnector::builder()?.build()?;
-            connector.connect(domain, stream)
-                .map_err(|e| match e {
-                    TlsHandshakeError::Failure(f) => f.into(),
-                    TlsHandshakeError::Interrupted(_) => panic!("Bug: TLS handshake not blocked"),
-                })
-                .map(|s| StreamSwitcher::Tls(s))
-        }
-    }
-}
-
-#[cfg(not(feature="tls"))]
-fn wrap_stream(stream: TcpStream, _domain: &str, mode: Mode) -> Result<AutoStream> {
-    match mode {
-        Mode::Plain => Ok(stream),
-        Mode::Tls => Err(Error::Url("TLS support not compiled in.".into())),
-    }
-}
-
 fn connect_to_some<A>(addrs: A, url: &Url, mode: Mode) -> Result<AutoStream>
     where A: Iterator<Item=SocketAddr>
 {

src/error.rs

@@ -12,7 +12,9 @@ use std::string;
 use httparse;
 
 #[cfg(feature="tls")]
-use native_tls;
+pub mod tls {
+    pub use native_tls::Error;
+}
 
 pub type Result<T> = result::Result<T, Error>;
 
@@ -25,7 +27,7 @@ pub enum Error {
     Io(io::Error),
     #[cfg(feature="tls")]
     /// TLS error
-    Tls(native_tls::Error),
+    Tls(tls::Error),
     /// Buffer capacity exhausted
     Capacity(Cow<'static, str>),
     /// Protocol violation
@@ -89,8 +91,8 @@ impl From<string::FromUtf8Error> for Error {
 }
 
 #[cfg(feature="tls")]
-impl From<native_tls::Error> for Error {
-    fn from(err: native_tls::Error) -> Self {
+impl From<tls::Error> for Error {
+    fn from(err: tls::Error) -> Self {
         Error::Tls(err)
     }
 }