Introduce more features to make the crate cleaner.

Cargo.toml

@@ -11,7 +11,10 @@ license = "GPL-3.0-or-later"
 repository = "https://github.com/ssrlive/socks5-impl"
 
 [features]
-default = ["tokio"]
+default = []
+client = ["tokio"]
+serde = ["dep:serde"]
+server = ["tokio"]
 tokio = ["dep:tokio"]
 
 [dependencies]
@@ -20,25 +23,31 @@ async-trait = "0.1"
 byteorder = "1"
 bytes = "1"
 percent-encoding = "2"
-serde = { version = "1", features = ["derive"] }
+serde = { version = "1", features = ["derive"], optional = true }
 thiserror = "2"
-tokio = { version = "1", features = ["full"], optional = true }
+tokio = { version = "1", default-features = false, features = [
+    "net",
+    "io-util",
+    "time",
+    "macros",
+    "rt",
+], optional = true }
 
 [dev-dependencies]
 clap = { version = "4", features = ["derive"] }
 ctrlc2 = { version = "3", features = ["tokio", "termination"] }
 dotenvy = "0.15"
 env_logger = "0.11"
+hickory-proto = "0.24"
 log = "0.4"
 moka = { version = "0.12", features = ["future"] }
 rand = "0.8"
-tokio = { version = "1", features = ["macros", "rt-multi-thread"] }
-hickory-proto = "0.24"
+tokio = { version = "1", features = ["rt-multi-thread"] }
 
 [[example]]
 name = "demo-client"
 path = "examples/demo-client.rs"
-required-features = ["tokio"]
+required-features = ["client"]
 
 [[example]]
 name = "demo-server"
@@ -48,14 +57,14 @@ required-features = ["tokio"]
 [[example]]
 name = "dns-query"
 path = "examples/dns-query.rs"
-required-features = ["tokio"]
+required-features = ["client"]
 
 [[example]]
 name = "s5-server"
 path = "examples/s5-server.rs"
-required-features = ["tokio"]
+required-features = ["server"]
 
 [[example]]
 name = "udp-client"
 path = "examples/udp-client.rs"
-required-features = ["tokio"]
+required-features = ["client"]

src/lib.rs

@@ -1,10 +1,10 @@
 #![doc = include_str!("../README.md")]
 
-#[cfg(feature = "tokio")]
+#[cfg(feature = "client")]
 pub mod client;
 pub(crate) mod error;
 pub mod protocol;
-#[cfg(feature = "tokio")]
+#[cfg(feature = "server")]
 pub mod server;
 
 pub use crate::error::{Error, Result};

src/protocol/handshake/password_method/mod.rs

@@ -1,8 +1,6 @@
 mod request;
 mod response;
 
-use serde::{Deserialize, Serialize};
-
 pub use self::{
     request::Request,
     response::{Response, Status},
@@ -11,7 +9,8 @@ pub use self::{
 pub const SUBNEGOTIATION_VERSION: u8 = 0x01;
 
 /// Required for a username + password authentication.
-#[derive(Default, Debug, Eq, PartialEq, Clone, Hash, Deserialize, Serialize)]
+#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
+#[derive(Default, Debug, Eq, PartialEq, Clone, Hash)]
 pub struct UserKey {
     pub username: String,
     pub password: String,