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Use named constants for static header values (#535)

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Improves performance by moving some computation to compile time.
This commit is contained in:
Jonas Platte 2021-11-17 20:53:07 +01:00 • committed by GitHub
parent 9a410371a6
commit 2bfd51372e
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 25 additions and 25 deletions
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2
axum/Cargo.toml
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@ -25,7 +25,7 @@ async-trait = "0.1.43"
bitflags = "1.0"
bytes = "1.0"
futures-util = { version = "0.3", default-features = false, features = ["alloc"] }
http = "0.2"
http = "0.2.5"
http-body = "0.4.4"
hyper = { version = "0.14.14", features = ["server", "tcp", "stream"] }
matchit = "0.4.4"

9
axum/src/json.rs
View file

@ -176,6 +176,9 @@ where
type BodyError = Infallible;
fn into_response(self) -> Response<Self::Body> {
#[allow(clippy::declare_interior_mutable_const)]
const APPLICATION_JSON: HeaderValue = HeaderValue::from_static("application/json");
let bytes = match serde_json::to_vec(&self.0) {
Ok(res) => res,
Err(err) => {
@ -188,10 +191,8 @@ where
};
let mut res = Response::new(Full::from(bytes));
res.headers_mut().insert(
header::CONTENT_TYPE,
HeaderValue::from_static("application/json"),
);
res.headers_mut()
.insert(header::CONTENT_TYPE, APPLICATION_JSON);
res
}
}

39
axum/src/response/mod.rs
View file

@ -331,23 +331,26 @@ impl IntoResponse for std::borrow::Cow<'static, str> {
type BodyError = Infallible;
fn into_response(self) -> Response<Self::Body> {
#[allow(clippy::declare_interior_mutable_const)]
const TEXT_PLAIN: HeaderValue = HeaderValue::from_static("text/plain");
let mut res = Response::new(Full::from(self));
res.headers_mut()
.insert(header::CONTENT_TYPE, HeaderValue::from_static("text/plain"));
res.headers_mut().insert(header::CONTENT_TYPE, TEXT_PLAIN);
res
}
}
#[allow(clippy::declare_interior_mutable_const)]
const APPLICATION_OCTET_STREAM: HeaderValue = HeaderValue::from_static("application/octet-stream");
impl IntoResponse for Bytes {
type Body = Full<Bytes>;
type BodyError = Infallible;
fn into_response(self) -> Response<Self::Body> {
let mut res = Response::new(Full::from(self));
res.headers_mut().insert(
header::CONTENT_TYPE,
HeaderValue::from_static("application/octet-stream"),
);
res.headers_mut()
.insert(header::CONTENT_TYPE, APPLICATION_OCTET_STREAM);
res
}
}
@ -358,10 +361,8 @@ impl IntoResponse for &'static [u8] {
fn into_response(self) -> Response<Self::Body> {
let mut res = Response::new(Full::from(self));
res.headers_mut().insert(
header::CONTENT_TYPE,
HeaderValue::from_static("application/octet-stream"),
);
res.headers_mut()
.insert(header::CONTENT_TYPE, APPLICATION_OCTET_STREAM);
res
}
}
@ -372,10 +373,8 @@ impl IntoResponse for Vec<u8> {
fn into_response(self) -> Response<Self::Body> {
let mut res = Response::new(Full::from(self));
res.headers_mut().insert(
header::CONTENT_TYPE,
HeaderValue::from_static("application/octet-stream"),
);
res.headers_mut()
.insert(header::CONTENT_TYPE, APPLICATION_OCTET_STREAM);
res
}
}
@ -386,10 +385,8 @@ impl IntoResponse for std::borrow::Cow<'static, [u8]> {
fn into_response(self) -> Response<Self::Body> {
let mut res = Response::new(Full::from(self));
res.headers_mut().insert(
header::CONTENT_TYPE,
HeaderValue::from_static("application/octet-stream"),
);
res.headers_mut()
.insert(header::CONTENT_TYPE, APPLICATION_OCTET_STREAM);
res
}
}
@ -471,9 +468,11 @@ where
type BodyError = Infallible;
fn into_response(self) -> Response<Self::Body> {
#[allow(clippy::declare_interior_mutable_const)]
const TEXT_HTML: HeaderValue = HeaderValue::from_static("text/html");
let mut res = Response::new(self.0.into());
res.headers_mut()
.insert(header::CONTENT_TYPE, HeaderValue::from_static("text/html"));
res.headers_mut().insert(header::CONTENT_TYPE, TEXT_HTML);
res
}
}