refactor(lib): resolve unused warnings from server-specific code (#2710)

src/error.rs

@@ -71,6 +71,7 @@ pub(super) enum Parse {
     #[cfg(feature = "http1")]
     VersionH2,
     Uri,
+    #[cfg_attr(not(all(feature = "http1", feature = "server")), allow(unused))]
     UriTooLong,
     Header(Header),
     TooLarge,

src/proto/h1/conn.rs

@@ -1,6 +1,7 @@
 use std::fmt;
 use std::io;
 use std::marker::PhantomData;
+#[cfg(all(feature = "server", feature = "runtime"))]
 use std::time::Duration;
 
 use bytes::{Buf, Bytes};

src/proto/h1/io.rs

@@ -3,6 +3,7 @@ use std::fmt;
 use std::io::{self, IoSlice};
 use std::marker::Unpin;
 use std::mem::MaybeUninit;
+#[cfg(all(feature = "server", feature = "runtime"))]
 use std::future::Future;
 #[cfg(all(feature = "server", feature = "runtime"))]
 use std::time::Duration;
@@ -11,7 +12,7 @@ use std::time::Duration;
 use tokio::time::Instant;
 use bytes::{Buf, BufMut, Bytes, BytesMut};
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
-use tracing::{debug, warn, trace};
+use tracing::{debug, trace};
 
 use super::{Http1Transaction, ParseContext, ParsedMessage};
 use crate::common::buf::BufList;
@@ -227,7 +228,7 @@ where
                             if Pin::new( h1_header_read_timeout_fut).poll(cx).is_ready() {
                                 *parse_ctx.h1_header_read_timeout_running = false;
 
-                                warn!("read header from client timeout");
+                                tracing::warn!("read header from client timeout");
                                 return Poll::Ready(Err(crate::Error::new_header_timeout()))
                             }
                         }

src/proto/h1/mod.rs

@@ -1,5 +1,5 @@
-use std::pin::Pin;
-use std::time::Duration;
+#[cfg(all(feature = "server", feature = "runtime"))]
+use std::{pin::Pin, time::Duration};
 
 use bytes::BytesMut;
 use http::{HeaderMap, Method};

src/proto/h1/role.rs

@@ -25,6 +25,7 @@ use crate::proto::{BodyLength, MessageHead, RequestHead, RequestLine};
 
 const MAX_HEADERS: usize = 100;
 const AVERAGE_HEADER_SIZE: usize = 30; // totally scientific
+#[cfg(feature = "server")]
 const MAX_URI_LEN: usize = (u16::MAX - 1) as usize;
 
 macro_rules! header_name {