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fix: honor Accept media parameters

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This commit is contained in:
Hare
2026-09-30 07:59:50 +09:00
parent 625f4c148d
commit 96db3dd6a8
2 changed files with 77 additions and 25 deletions
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crates/wip-https/src/codec.rs
+47 -16
View File
@@ -53,6 +53,15 @@ fn require_response_content_type<B>(response: &Response<B>) -> Result<(), Client
}
}
fn is_utf8_charset(value: &str) -> bool {
let value = value.trim();
value.eq_ignore_ascii_case("utf-8")
|| value
.strip_prefix('"')
.and_then(|value| value.strip_suffix('"'))
.is_some_and(|value| value.eq_ignore_ascii_case("utf-8"))
}
/// Returns whether a Content-Type value denotes UTF-8 `application/json`.
///
/// The charset parameter is optional because JSON exchanged by this binding is
@@ -72,13 +81,7 @@ pub fn is_json_content_type(value: &str) -> bool {
let Some((name, value)) = parameter.trim().split_once('=') else {
return false;
};
let charset = value.trim();
let charset_is_utf8 = charset.eq_ignore_ascii_case("utf-8")
|| charset
.strip_prefix('"')
.and_then(|value| value.strip_suffix('"'))
.is_some_and(|value| value.eq_ignore_ascii_case("utf-8"));
if !name.trim().eq_ignore_ascii_case("charset") || !charset_is_utf8 || saw_charset {
if !name.trim().eq_ignore_ascii_case("charset") || !is_utf8_charset(value) || saw_charset {
return false;
}
saw_charset = true;
@@ -88,7 +91,7 @@ pub fn is_json_content_type(value: &str) -> bool {
fn accepts_json(headers: &HeaderMap) -> bool {
let mut present = false;
let mut best_match: Option<(u8, f32)> = None;
let mut best_match: Option<((u8, u8), f32)> = None;
for value in headers.get_all(ACCEPT) {
present = true;
let Ok(value) = value.to_str() else {
@@ -99,17 +102,30 @@ fn accepts_json(headers: &HeaderMap) -> bool {
let media_range = parts.next().unwrap_or_default().trim();
let mut quality = 1.0_f32;
let mut saw_quality = false;
let mut saw_charset = false;
let mut media_parameter_count = 0;
let mut valid = true;
for parameter in parts {
let Some((name, value)) = parameter.trim().split_once('=') else {
valid = false;
break;
};
if name.trim().eq_ignore_ascii_case("q") {
if saw_quality {
let parameter = parameter.trim();
let (name, value) = parameter
.split_once('=')
.map_or((parameter, None), |(name, value)| {
(name.trim(), Some(value))
});
if name.is_empty() {
valid = false;
break;
}
if saw_quality {
// Parameters after q are Accept extensions and do not
// constrain the selected representation.
continue;
}
if name.eq_ignore_ascii_case("q") {
let Some(value) = value else {
valid = false;
break;
};
saw_quality = true;
match value.trim().parse::<f32>() {
Ok(value) if (0.0..=1.0).contains(&value) => quality = value,
@@ -118,9 +134,23 @@ fn accepts_json(headers: &HeaderMap) -> bool {
break;
}
}
} else {
let Some(value) = value else {
valid = false;
break;
};
if !name.eq_ignore_ascii_case("charset")
|| !is_utf8_charset(value)
|| saw_charset
{
valid = false;
break;
}
saw_charset = true;
media_parameter_count += 1;
}
}
let specificity = if media_range.eq_ignore_ascii_case("application/json") {
let media_specificity = if media_range.eq_ignore_ascii_case("application/json") {
Some(2)
} else if media_range.eq_ignore_ascii_case("application/*") {
Some(1)
@@ -129,7 +159,8 @@ fn accepts_json(headers: &HeaderMap) -> bool {
} else {
None
};
if valid && let Some(specificity) = specificity {
if valid && let Some(media_specificity) = media_specificity {
let specificity = (media_specificity, media_parameter_count);
match best_match {
Some((best_specificity, _)) if best_specificity > specificity => {}
Some((best_specificity, best_quality)) if best_specificity == specificity => {
crates/wip-https/tests/routes.rs
+23 -2
View File
@@ -73,16 +73,37 @@ fn inbound_http_metadata_enforces_post_route_and_json() {
.unwrap();
assert!(validate_http_request(&endpoint, Route::Fetch, &wrong_route).is_err());
for accept in [
"text/plain, */*;q=1, application/json;q=0",
"application/json; charset=utf-16",
"application/json; profile=future",
] {
let incompatible_accept = Request::builder()
.method(Method::POST)
.uri("/wip/v1/fetch")
.header("content-type", "application/json")
.header("accept", "text/plain, */*;q=1, application/json;q=0")
.header("accept", accept)
.body(Vec::<u8>::new())
.unwrap();
let error = validate_http_request(&endpoint, Route::Fetch, &incompatible_accept).unwrap_err();
let error =
validate_http_request(&endpoint, Route::Fetch, &incompatible_accept).unwrap_err();
assert!(matches!(&error, RequestMetadataError::NotAcceptable));
assert_eq!(error.status(), StatusCode::NOT_ACCEPTABLE);
}
for accept in [
"application/json; charset=UTF-8",
"application/json; q=1; profile=accept-extension",
] {
let compatible_accept = Request::builder()
.method(Method::POST)
.uri("/wip/v1/fetch")
.header("content-type", "application/json")
.header("accept", accept)
.body(Vec::<u8>::new())
.unwrap();
assert!(validate_http_request(&endpoint, Route::Fetch, &compatible_accept).is_ok());
}
let unsupported_media_type = Request::builder()
.method(Method::POST)