Rename UrlErrorType to just UrlError, implement using thiserror

src/client.rs

@@ -52,7 +52,7 @@ mod encryption {
     use std::net::TcpStream;
 
     use crate::{
-        error::{Error, Result, UrlErrorType},
+        error::{Error, Result, UrlError},
         stream::Mode,
     };
 
@@ -62,7 +62,7 @@ mod encryption {
     pub fn wrap_stream(stream: TcpStream, _domain: &str, mode: Mode) -> Result<AutoStream> {
         match mode {
             Mode::Plain => Ok(stream),
-            Mode::Tls => Err(Error::Url(UrlErrorType::TlsFeatureNotEnabled)),
+            Mode::Tls => Err(Error::Url(UrlError::TlsFeatureNotEnabled)),
         }
     }
 }
@@ -71,7 +71,7 @@ use self::encryption::wrap_stream;
 pub use self::encryption::AutoStream;
 
 use crate::{
-    error::{Error, Result, UrlErrorType},
+    error::{Error, Result, UrlError},
     handshake::{client::ClientHandshake, HandshakeError},
     protocol::WebSocket,
     stream::{Mode, NoDelay},
@@ -103,7 +103,7 @@ pub fn connect_with_config<Req: IntoClientRequest>(
     ) -> Result<(WebSocket<AutoStream>, Response)> {
         let uri = request.uri();
         let mode = uri_mode(uri)?;
-        let host = request.uri().host().ok_or(Error::Url(UrlErrorType::NoHostName))?;
+        let host = request.uri().host().ok_or(Error::Url(UrlError::NoHostName))?;
         let port = uri.port_u16().unwrap_or(match mode {
             Mode::Plain => 80,
             Mode::Tls => 443,
@@ -165,7 +165,7 @@ pub fn connect<Req: IntoClientRequest>(request: Req) -> Result<(WebSocket<AutoSt
 }
 
 fn connect_to_some(addrs: &[SocketAddr], uri: &Uri, mode: Mode) -> Result<AutoStream> {
-    let domain = uri.host().ok_or(Error::Url(UrlErrorType::NoHostName))?;
+    let domain = uri.host().ok_or(Error::Url(UrlError::NoHostName))?;
     for addr in addrs {
         debug!("Trying to contact {} at {}...", uri, addr);
         if let Ok(raw_stream) = TcpStream::connect(addr) {
@@ -174,7 +174,7 @@ fn connect_to_some(addrs: &[SocketAddr], uri: &Uri, mode: Mode) -> Result<AutoSt
             }
         }
     }
-    Err(Error::Url(UrlErrorType::UnableToConnect(uri.to_string())))
+    Err(Error::Url(UrlError::UnableToConnect(uri.to_string())))
 }
 
 /// Get the mode of the given URL.
@@ -185,7 +185,7 @@ pub fn uri_mode(uri: &Uri) -> Result<Mode> {
     match uri.scheme_str() {
         Some("ws") => Ok(Mode::Plain),
         Some("wss") => Ok(Mode::Tls),
-        _ => Err(Error::Url(UrlErrorType::UnsupportedUrlScheme)),
+        _ => Err(Error::Url(UrlError::UnsupportedUrlScheme)),
     }
 }
 

src/error.rs

@@ -1,6 +1,6 @@
 //! Error handling.
 
-use std::{fmt, io, result, str, string};
+use std::{io, result, str, string};
 
 use crate::protocol::{frame::coding::Data, Message};
 use http::Response;
@@ -44,8 +44,8 @@ pub enum Error {
     /// underlying connection and you should probably consider them fatal.
     #[error("IO error: {0}")]
     Io(#[from] io::Error),
-    #[cfg(feature = "tls")]
     /// TLS error.
+    #[cfg(feature = "tls")]
     #[error("TLS error: {0}")]
     Tls(#[from] tls::Error),
     /// - When reading: buffer capacity exhausted.
@@ -59,12 +59,12 @@ pub enum Error {
     /// Message send queue full.
     #[error("Send queue is full")]
     SendQueueFull(Message),
-    /// UTF coding error
+    /// UTF coding error.
     #[error("UTF-8 encoding error")]
     Utf8,
     /// Invalid URL.
     #[error("URL error: {0}")]
-    Url(UrlErrorType),
+    Url(UrlError),
     /// HTTP error.
     #[error("HTTP error: {}", .0.status())]
     Http(Response<Option<String>>),
@@ -227,31 +227,24 @@ pub enum ProtocolError {
 }
 
 /// Indicates the specific type/cause of URL error.
-#[derive(Debug, PartialEq, Eq)]
-pub enum UrlErrorType {
+#[derive(Error, Debug, PartialEq, Eq)]
+pub enum UrlError {
     /// TLS is used despite not being compiled with the TLS feature enabled.
+    #[error("TLS support not compiled in")]
     TlsFeatureNotEnabled,
     /// The URL does not include a host name.
+    #[error("No host name in the URL")]
     NoHostName,
     /// Failed to connect with this URL.
+    #[error("Unable to connect to {0}")]
     UnableToConnect(String),
     /// Unsupported URL scheme used (only `ws://` or `wss://` may be used).
+    #[error("URL scheme not supported")]
     UnsupportedUrlScheme,
     /// The URL host name, though included, is empty.
+    #[error("URL contains empty host name")]
     EmptyHostName,
     /// The URL does not include a path/query.
+    #[error("No path/query in URL")]
     NoPathOrQuery,
 }
-
-impl fmt::Display for UrlErrorType {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self {
-            UrlErrorType::TlsFeatureNotEnabled => write!(f, "TLS support not compiled in"),
-            UrlErrorType::NoHostName => write!(f, "No host name in the URL"),
-            UrlErrorType::UnableToConnect(uri) => write!(f, "Unable to connect to {}", uri),
-            UrlErrorType::UnsupportedUrlScheme => write!(f, "URL scheme not supported"),
-            UrlErrorType::EmptyHostName => write!(f, "URL contains empty host name"),
-            UrlErrorType::NoPathOrQuery => write!(f, "No path/query in URL"),
-        }
-    }
-}

src/handshake/client.rs

@@ -16,7 +16,7 @@ use super::{
     HandshakeRole, MidHandshake, ProcessingResult,
 };
 use crate::{
-    error::{Error, ProtocolError, Result, UrlErrorType},
+    error::{Error, ProtocolError, Result, UrlError},
     protocol::{Role, WebSocket, WebSocketConfig},
 };
 
@@ -97,7 +97,7 @@ fn generate_request(request: Request, key: &str) -> Result<Vec<u8>> {
     let mut req = Vec::new();
     let uri = request.uri();
 
-    let authority = uri.authority().ok_or(Error::Url(UrlErrorType::NoHostName))?.as_str();
+    let authority = uri.authority().ok_or(Error::Url(UrlError::NoHostName))?.as_str();
     let host = if let Some(idx) = authority.find('@') {
         // handle possible name:password@
         authority.split_at(idx + 1).1
@@ -105,7 +105,7 @@ fn generate_request(request: Request, key: &str) -> Result<Vec<u8>> {
         authority
     };
     if authority.is_empty() {
-        return Err(Error::Url(UrlErrorType::EmptyHostName));
+        return Err(Error::Url(UrlError::EmptyHostName));
     }
 
     write!(
@@ -119,7 +119,7 @@ fn generate_request(request: Request, key: &str) -> Result<Vec<u8>> {
          Sec-WebSocket-Key: {key}\r\n",
         version = request.version(),
         host = host,
-        path = uri.path_and_query().ok_or(Error::Url(UrlErrorType::NoPathOrQuery))?.as_str(),
+        path = uri.path_and_query().ok_or(Error::Url(UrlError::NoPathOrQuery))?.as_str(),
         key = key
     )
     .unwrap();