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Code Issues Packages 1 Wiki Activity

perf(http): avoid per header alloc (#14051)

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Aaron O'Mullan 2022-03-21 12:56:30 +01:00 committed by Kitson Kelly
parent fc8aa5ad8b
commit f896666455
1 changed files with 24 additions and 38 deletions
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62
ext/http/lib.rs
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@ -517,50 +517,36 @@ async fn op_http_write_headers(
builder.headers_mut().unwrap().reserve(headers.len());
for (key, value) in &headers {
match &*key.to_ascii_lowercase() {
b"cache-control" => {
if let Ok(value) = std::str::from_utf8(value) {
if let Some(cache_control) = CacheControl::from_value(value) {
// We skip compression if the cache-control header value is set to
// "no-transform"
if cache_control.no_transform {
headers_allow_compression = false;
}
if key.eq_ignore_ascii_case(b"cache-control") {
if let Ok(value) = std::str::from_utf8(value) {
if let Some(cache_control) = CacheControl::from_value(value) {
// We skip compression if the cache-control header value is set to
// "no-transform"
if cache_control.no_transform {
headers_allow_compression = false;
}
} else {
headers_allow_compression = false;
}
}
b"content-range" => {
// we skip compression if the `content-range` header value is set, as it
// indicates the contents of the body were negotiated based directly
// with the user code and we can't compress the response
headers_allow_compression = false;
}
b"content-type" => {
if !value.is_empty() {
content_type_header = Some(value);
}
}
b"content-encoding" => {
// we don't compress if a content-encoding header was provided
} else {
headers_allow_compression = false;
}
} else if key.eq_ignore_ascii_case(b"content-range") {
// we skip compression if the `content-range` header value is set, as it
// indicates the contents of the body were negotiated based directly
// with the user code and we can't compress the response
headers_allow_compression = false;
} else if key.eq_ignore_ascii_case(b"content-type") && !value.is_empty() {
content_type_header = Some(value);
} else if key.eq_ignore_ascii_case(b"content-encoding") {
// we don't compress if a content-encoding header was provided
headers_allow_compression = false;
} else if key.eq_ignore_ascii_case(b"etag") && !value.is_empty() {
// we store the values of ETag and Vary and skip adding them for now, as
// we may need to modify or change.
b"etag" => {
if !value.is_empty() {
etag_header = Some(value);
continue;
}
}
b"vary" => {
if !value.is_empty() {
vary_header = Some(value);
continue;
}
}
_ => {}
etag_header = Some(value);
continue;
} else if key.eq_ignore_ascii_case(b"vary") && !value.is_empty() {
vary_header = Some(value);
continue;
}
builder = builder.header(key.as_ref(), value.as_ref());
}