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fix(http2): allow TE "trailers" request headers

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The HTTP/2 spec allows TE headers in requests if the value is
"trailers". Other TE headers are still stripped.

Closes #1642
This commit is contained in:
Theodore Cipicchio
2018-08-25 00:55:53 -07:00
committed by Sean McArthur
parent e3dc6c5511
commit 24f11a421d
4 changed files with 41 additions and 4 deletions
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17
src/proto/h2/mod.rs
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@@ -15,15 +15,17 @@ mod server;
pub(crate) use self::client::Client;
pub(crate) use self::server::Server;
fn strip_connection_headers(headers: &mut HeaderMap) {
fn strip_connection_headers(headers: &mut HeaderMap, is_request: bool) {
// List of connection headers from:
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Connection
//
// TE headers are allowed in HTTP/2 requests as long as the value is "trailers", so they're
// tested separately.
let connection_headers = [
HeaderName::from_lowercase(b"keep-alive").unwrap(),
HeaderName::from_lowercase(b"proxy-connection").unwrap(),
PROXY_AUTHENTICATE,
PROXY_AUTHORIZATION,
TE,
TRAILER,
TRANSFER_ENCODING,
UPGRADE,
@@ -35,6 +37,17 @@ fn strip_connection_headers(headers: &mut HeaderMap) {
}
}
if is_request {
if headers.get(TE).map(|te_header| te_header != "trailers").unwrap_or(false) {
warn!("TE headers not set to \"trailers\" are illegal in HTTP/2 requests");
headers.remove(TE);
}
} else {
if headers.remove(TE).is_some() {
warn!("TE headers illegal in HTTP/2 responses");
}
}
if let Some(header) = headers.remove(CONNECTION) {
warn!(
"Connection header illegal in HTTP/2: {}",