Fix compilation with --no-default-features

.github/workflows/rust.yml

@@ -34,6 +34,10 @@ jobs:
         with:
           command: test
           args: --all-features
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --no-default-features
 
   lint:
     runs-on: ubuntu-latest

src/client.rs

@@ -1,22 +1,12 @@
-use std::io;
-use std::sync::Arc;
 use std::time::Duration;
 
-use async_trait::async_trait;
-#[cfg(feature = "tokio-rustls")]
-use tokio::net::lookup_host;
-use tokio::net::TcpStream;
-#[cfg(feature = "tokio-rustls")]
-use tokio_rustls::client::TlsStream;
-#[cfg(feature = "tokio-rustls")]
-use tokio_rustls::rustls::{ClientConfig, OwnedTrustAnchor, RootCertStore, ServerName};
-#[cfg(feature = "tokio-rustls")]
-use tokio_rustls::TlsConnector;
-use tracing::{debug, error, info};
+use tracing::{debug, error};
 
-use crate::common::{Certificate, NoExtension, PrivateKey};
+use crate::common::NoExtension;
+#[cfg(feature = "tokio-rustls")]
+use crate::common::{Certificate, PrivateKey};
 pub use crate::connection::Connector;
-use crate::connection::{self, EppConnection};
+use crate::connection::EppConnection;
 use crate::error::Error;
 use crate::hello::{Greeting, Hello};
 use crate::request::{Command, CommandWrapper, Extension, Transaction};
@@ -39,6 +29,7 @@ use crate::xml;
 /// use instant_epp::domain::DomainCheck;
 /// use instant_epp::common::NoExtension;
 ///
+/// # #[cfg(feature = "tokio-rustls")]
 /// # #[tokio::main]
 /// # async fn main() {
 /// // Create an instance of EppClient
@@ -62,6 +53,9 @@ use crate::xml;
 ///     .iter()
 ///     .for_each(|chk| println!("Domain: {}, Available: {}", chk.inner.id, chk.inner.available));
 /// # }
+/// #
+/// # #[cfg(not(feature = "tokio-rustls"))]
+/// # fn main() {}
 /// ```
 ///
 /// The output would look like this:
@@ -215,77 +209,97 @@ impl<'c, 'e, C, E> Clone for RequestData<'c, 'e, C, E> {
 impl<'c, 'e, C, E> Copy for RequestData<'c, 'e, C, E> {}
 
 #[cfg(feature = "tokio-rustls")]
-pub struct RustlsConnector {
-    inner: TlsConnector,
-    domain: ServerName,
-    server: (String, u16),
-}
-
-impl RustlsConnector {
-    pub async fn new(
-        server: (String, u16),
-        identity: Option<(Vec<Certificate>, PrivateKey)>,
-    ) -> Result<Self, Error> {
-        let mut roots = RootCertStore::empty();
-        roots.add_server_trust_anchors(webpki_roots::TLS_SERVER_ROOTS.0.iter().map(|ta| {
-            OwnedTrustAnchor::from_subject_spki_name_constraints(
-                ta.subject,
-                ta.spki,
-                ta.name_constraints,
-            )
-        }));
-
-        let builder = ClientConfig::builder()
-            .with_safe_defaults()
-            .with_root_certificates(roots);
-
-        let config = match identity {
-            Some((certs, key)) => {
-                let certs = certs
-                    .into_iter()
-                    .map(|cert| tokio_rustls::rustls::Certificate(cert.0))
-                    .collect();
-                builder
-                    .with_client_auth_cert(certs, tokio_rustls::rustls::PrivateKey(key.0))
-                    .map_err(|e| Error::Other(e.into()))?
-            }
-            None => builder.with_no_client_auth(),
-        };
-
-        let domain = server.0.as_str().try_into().map_err(|_| {
-            io::Error::new(
-                io::ErrorKind::InvalidInput,
-                format!("Invalid domain: {}", server.0),
-            )
-        })?;
-
-        Ok(Self {
-            inner: TlsConnector::from(Arc::new(config)),
-            domain,
-            server,
-        })
-    }
-}
+use rustls_connector::RustlsConnector;
 
 #[cfg(feature = "tokio-rustls")]
-#[async_trait]
-impl Connector for RustlsConnector {
-    type Connection = TlsStream<TcpStream>;
+mod rustls_connector {
+    use std::io;
+    use std::sync::Arc;
+    use std::time::Duration;
 
-    async fn connect(&self, timeout: Duration) -> Result<Self::Connection, Error> {
-        info!("Connecting to server: {}:{}", self.server.0, self.server.1);
-        let addr = match lookup_host(&self.server).await?.next() {
-            Some(addr) => addr,
-            None => {
-                return Err(Error::Io(io::Error::new(
+    use async_trait::async_trait;
+    use tokio::net::lookup_host;
+    use tokio::net::TcpStream;
+    use tokio_rustls::client::TlsStream;
+    use tokio_rustls::rustls::{ClientConfig, OwnedTrustAnchor, RootCertStore, ServerName};
+    use tokio_rustls::TlsConnector;
+    use tracing::info;
+
+    use crate::common::{Certificate, PrivateKey};
+    use crate::connection::{self, Connector};
+    use crate::error::Error;
+
+    pub struct RustlsConnector {
+        inner: TlsConnector,
+        domain: ServerName,
+        server: (String, u16),
+    }
+
+    impl RustlsConnector {
+        pub async fn new(
+            server: (String, u16),
+            identity: Option<(Vec<Certificate>, PrivateKey)>,
+        ) -> Result<Self, Error> {
+            let mut roots = RootCertStore::empty();
+            roots.add_server_trust_anchors(webpki_roots::TLS_SERVER_ROOTS.0.iter().map(|ta| {
+                OwnedTrustAnchor::from_subject_spki_name_constraints(
+                    ta.subject,
+                    ta.spki,
+                    ta.name_constraints,
+                )
+            }));
+
+            let builder = ClientConfig::builder()
+                .with_safe_defaults()
+                .with_root_certificates(roots);
+
+            let config = match identity {
+                Some((certs, key)) => {
+                    let certs = certs
+                        .into_iter()
+                        .map(|cert| tokio_rustls::rustls::Certificate(cert.0))
+                        .collect();
+                    builder
+                        .with_client_auth_cert(certs, tokio_rustls::rustls::PrivateKey(key.0))
+                        .map_err(|e| Error::Other(e.into()))?
+                }
+                None => builder.with_no_client_auth(),
+            };
+
+            let domain = server.0.as_str().try_into().map_err(|_| {
+                io::Error::new(
                     io::ErrorKind::InvalidInput,
-                    format!("Invalid host: {}", &self.server.0),
-                )))
-            }
-        };
+                    format!("Invalid domain: {}", server.0),
+                )
+            })?;
 
-        let stream = TcpStream::connect(addr).await?;
-        let future = self.inner.connect(self.domain.clone(), stream);
-        connection::timeout(timeout, future).await
+            Ok(Self {
+                inner: TlsConnector::from(Arc::new(config)),
+                domain,
+                server,
+            })
+        }
+    }
+
+    #[async_trait]
+    impl Connector for RustlsConnector {
+        type Connection = TlsStream<TcpStream>;
+
+        async fn connect(&self, timeout: Duration) -> Result<Self::Connection, Error> {
+            info!("Connecting to server: {}:{}", self.server.0, self.server.1);
+            let addr = match lookup_host(&self.server).await?.next() {
+                Some(addr) => addr,
+                None => {
+                    return Err(Error::Io(io::Error::new(
+                        io::ErrorKind::InvalidInput,
+                        format!("Invalid host: {}", &self.server.0),
+                    )))
+                }
+            };
+
+            let stream = TcpStream::connect(addr).await?;
+            let future = self.inner.connect(self.domain.clone(), stream);
+            connection::timeout(timeout, future).await
+        }
     }
 }