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// Copyright 2024 Cloudflare, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use crate::*;
use bytes::Bytes;
use http::header;
#[derive(Debug, Clone)]
pub struct CaseHeaderName(Bytes);
impl CaseHeaderName {
pub fn new(name: String) -> Self {
CaseHeaderName(name.into())
}
}
impl CaseHeaderName {
pub fn as_slice(&self) -> &[u8] {
&self.0
}
pub fn from_slice(buf: &[u8]) -> Self {
CaseHeaderName(Bytes::copy_from_slice(buf))
}
}
/// A trait that converts into case-sensitive header names.
pub trait IntoCaseHeaderName {
fn into_case_header_name(self) -> CaseHeaderName;
}
impl IntoCaseHeaderName for CaseHeaderName {
fn into_case_header_name(self) -> CaseHeaderName {
self
}
}
impl IntoCaseHeaderName for String {
fn into_case_header_name(self) -> CaseHeaderName {
CaseHeaderName(self.into())
}
}
impl IntoCaseHeaderName for &'static str {
fn into_case_header_name(self) -> CaseHeaderName {
CaseHeaderName(self.into())
}
}
impl IntoCaseHeaderName for HeaderName {
fn into_case_header_name(self) -> CaseHeaderName {
CaseHeaderName(titled_header_name(&self))
}
}
impl IntoCaseHeaderName for &HeaderName {
fn into_case_header_name(self) -> CaseHeaderName {
CaseHeaderName(titled_header_name(self))
}
}
impl IntoCaseHeaderName for Bytes {
fn into_case_header_name(self) -> CaseHeaderName {
CaseHeaderName(self)
}
}
fn titled_header_name(header_name: &HeaderName) -> Bytes {
titled_header_name_str(header_name).map_or_else(
|| Bytes::copy_from_slice(header_name.as_str().as_bytes()),
|s| Bytes::from_static(s.as_bytes()),
)
}
pub(crate) fn titled_header_name_str(header_name: &HeaderName) -> Option<&'static str> {
Some(match *header_name {
header::AGE => "Age",
header::CACHE_CONTROL => "Cache-Control",
header::CONNECTION => "Connection",
header::CONTENT_TYPE => "Content-Type",
header::CONTENT_ENCODING => "Content-Encoding",
header::CONTENT_LENGTH => "Content-Length",
header::DATE => "Date",
header::TRANSFER_ENCODING => "Transfer-Encoding",
header::HOST => "Host",
header::SERVER => "Server",
header::SET_COOKIE => "Set-Cookie",
// TODO: add more const header here to map to their titled case
// TODO: automatically upper case the first letter?
_ => {
return None;
}
})
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_case_header_name() {
assert_eq!("FoO".into_case_header_name().as_slice(), b"FoO");
assert_eq!("FoO".to_string().into_case_header_name().as_slice(), b"FoO");
assert_eq!(header::SERVER.into_case_header_name().as_slice(), b"Server");
}
}
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