Switch serde dependency to serde_core (#3477)

axum/Cargo.toml

@@ -33,7 +33,7 @@ allowed = [
     "bytes",
     "http",
     "http_body",
-    "serde",
+    "serde_core",
     "tokio",
     # for the `__private` feature
     "reqwest",
@@ -78,6 +78,7 @@ __private_docs = [
     "axum-core/__private_docs",
     # Enables upstream things linked to in docs
     "tower/full",
+    "dep:serde",
     "dep:tower-http",
 ]
 
@@ -100,7 +101,7 @@ memchr = "2.4.1"
 mime = "0.3.16"
 percent-encoding = "2.1"
 pin-project-lite = "0.2.7"
-serde = "1.0"
+serde_core = "1.0.221"
 sync_wrapper = "1.0.0"
 tower = { version = "0.5.2", default-features = false, features = ["util"] }
 tower-layer = "0.3.2"
@@ -122,6 +123,9 @@ tokio = { package = "tokio", version = "1.44", features = ["time"], optional = t
 tokio-tungstenite = { version = "0.27.0", optional = true }
 tracing = { version = "0.1", default-features = false, optional = true }
 
+# doc dependencies
+serde = { version = "1.0.211", optional = true }
+
 [dependencies.tower-http]
 version = "0.6.0"
 optional = true
@@ -165,7 +169,7 @@ hyper = { version = "1.1.0", features = ["client"] }
 quickcheck = "1.0"
 quickcheck_macros = "1.0"
 reqwest = { version = "0.12", default-features = false, features = ["json", "stream", "multipart"] }
-serde = { version = "1.0", features = ["derive"] }
+serde = { version = "1.0.221", features = ["derive"] }
 serde_json = { version = "1.0", features = ["raw_value"] }
 time = { version = "0.3", features = ["serde-human-readable"] }
 tokio = { package = "tokio", version = "1.44.2", features = ["macros", "rt", "rt-multi-thread", "net", "test-util"] }

axum/src/extract/path/de.rs

@@ -1,6 +1,6 @@
 use super::{ErrorKind, PathDeserializationError};
 use crate::util::PercentDecodedStr;
-use serde::{
+use serde_core::{
     de::{self, DeserializeSeed, EnumAccess, Error, MapAccess, SeqAccess, VariantAccess, Visitor},
     forward_to_deserialize_any, Deserializer,
 };

axum/src/extract/path/mod.rs

@@ -14,7 +14,7 @@ use axum_core::{
     RequestPartsExt as _,
 };
 use http::{request::Parts, StatusCode};
-use serde::de::DeserializeOwned;
+use serde_core::de::DeserializeOwned;
 use std::{fmt, sync::Arc};
 
 /// Extractor that will get captures from the URL and parse them using
@@ -254,7 +254,7 @@ impl WrongNumberOfParameters<usize> {
     }
 }
 
-impl serde::de::Error for PathDeserializationError {
+impl serde_core::de::Error for PathDeserializationError {
     #[inline]
     fn custom<T>(msg: T) -> Self
     where
@@ -710,7 +710,7 @@ mod tests {
     async fn captures_match_empty_inner_segments() {
         let app = Router::new().route(
             "/{key}/method",
-            get(|Path(param): Path<String>| async move { param.to_string() }),
+            get(|Path(param): Path<String>| async move { param.clone() }),
         );
 
         let client = TestClient::new(app);
@@ -726,7 +726,7 @@ mod tests {
     async fn captures_match_empty_inner_segments_near_end() {
         let app = Router::new().route(
             "/method/{key}/",
-            get(|Path(param): Path<String>| async move { param.to_string() }),
+            get(|Path(param): Path<String>| async move { param.clone() }),
         );
 
         let client = TestClient::new(app);
@@ -745,7 +745,7 @@ mod tests {
     async fn captures_match_empty_trailing_segment() {
         let app = Router::new().route(
             "/method/{key}",
-            get(|Path(param): Path<String>| async move { param.to_string() }),
+            get(|Path(param): Path<String>| async move { param.clone() }),
         );
 
         let client = TestClient::new(app);

axum/src/extract/query.rs

@@ -1,6 +1,6 @@
 use super::{rejection::*, FromRequestParts};
 use http::{request::Parts, Uri};
-use serde::de::DeserializeOwned;
+use serde_core::de::DeserializeOwned;
 
 /// Extractor that deserializes query strings into some type.
 ///

axum/src/form.rs

@@ -4,8 +4,7 @@ use axum_core::response::{IntoResponse, Response};
 use axum_core::RequestExt;
 use http::header::CONTENT_TYPE;
 use http::StatusCode;
-use serde::de::DeserializeOwned;
-use serde::Serialize;
+use serde_core::{de::DeserializeOwned, Serialize};
 
 /// URL encoded extractor and response.
 ///

axum/src/json.rs

@@ -7,7 +7,7 @@ use http::{
     header::{self, HeaderMap, HeaderValue},
     StatusCode,
 };
-use serde::{de::DeserializeOwned, Serialize};
+use serde_core::{de::DeserializeOwned, Serialize};
 
 /// JSON Extractor / Response.
 ///

axum/src/response/sse.rs

@@ -255,7 +255,7 @@ impl Event {
     #[cfg(feature = "json")]
     pub fn json_data<T>(self, data: T) -> Result<Self, axum_core::Error>
     where
-        T: serde::Serialize,
+        T: serde_core::Serialize,
     {
         struct JsonWriter<'a>(&'a mut EventDataWriter);
         impl std::io::Write for JsonWriter<'_> {

axum/src/test_helpers/test_client.rs

@@ -102,7 +102,7 @@ impl RequestBuilder {
 
     pub fn json<T>(mut self, json: &T) -> Self
     where
-        T: serde::Serialize,
+        T: serde_core::Serialize,
     {
         self.builder = self.builder.json(json);
         self
@@ -165,7 +165,7 @@ impl TestResponse {
     #[allow(dead_code)]
     pub async fn json<T>(self) -> T
     where
-        T: serde::de::DeserializeOwned,
+        T: serde_core::de::DeserializeOwned,
     {
         self.response.json().await.unwrap()
     }