Skip to content

Feat: Add a feature flag to ignore connection headers #705

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
eaufavor wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Feat: Add a feature flag to ignore connection headers #705

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions Cargo.toml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -24,6 +24,7 @@ rust-version = "1.63"
[features]
# Enables `futures::Stream` implementations for various types.
stream = []
ignore_connection_header = []

# Enables **unstable** APIs. Any API exposed by this feature has no backwards
# compatibility guarantees. In other words, you should not use this feature for
Expand Down
19 changes: 14 additions & 5 deletions src/frame/headers.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -871,16 +871,25 @@ impl HeaderBlock {
match header {
Field { name, value } => {
// Connection level header fields are not supported and must
// result in a protocol error.
// result in a protocol error. However in reality there are
// servers setting these headers. Some of these headers are
// purely informational and can be simply ignored without
// affecting the integrity of the stream.

if name == header::CONNECTION
|| name == header::TRANSFER_ENCODING
if name == header::TRANSFER_ENCODING {
tracing::trace!("load_hpack; connection level header");
malformed = true;
} else if name == header::CONNECTION
|| name == header::UPGRADE
|| name == "keep-alive"
|| name == "proxy-connection"
{
tracing::trace!("load_hpack; connection level header");
malformed = true;
if cfg!(feature = "ignore_connection_header") {
tracing::trace!("load_hpack; connection level header ignored");
} else {
tracing::trace!("load_hpack; connection level header");
malformed = true;
}
} else if name == header::TE && value != "trailers" {
tracing::trace!(
"load_hpack; TE header not set to trailers; val={:?}",
Expand Down
3 changes: 3 additions & 0 deletions tests/h2-support/Cargo.toml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,9 @@ version = "0.1.0"
authors = ["Carl Lerche <me@carllerche.com>"]
edition = "2018"

[features]
ignore_connection_header = ["h2/ignore_connection_header"]

[dependencies]
h2 = { path = "../..", features = ["stream", "unstable"] }

Expand Down
3 changes: 3 additions & 0 deletions tests/h2-tests/Cargo.toml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,9 @@ authors = ["Carl Lerche <me@carllerche.com>"]
publish = false
edition = "2018"

[features]
ignore_connection_header = ["h2-support/ignore_connection_header"]

[dependencies]

[dev-dependencies]
Expand Down
89 changes: 74 additions & 15 deletions tests/h2-tests/tests/server.rs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -528,25 +528,84 @@ async fn recv_connection_header() {
};

let client = async move {
let settings = client.assert_server_handshake().await;
assert_default_settings!(settings);
client.send_frame(req(1, "connection", "foo")).await;
client.send_frame(req(3, "keep-alive", "5")).await;
client.send_frame(req(5, "proxy-connection", "bar")).await;
client
.send_frame(req(7, "transfer-encoding", "chunked"))
.await;
client.send_frame(req(9, "upgrade", "HTTP/2")).await;
client.recv_frame(frames::reset(1).protocol_error()).await;
client.recv_frame(frames::reset(3).protocol_error()).await;
client.recv_frame(frames::reset(5).protocol_error()).await;
client.recv_frame(frames::reset(7).protocol_error()).await;
client.recv_frame(frames::reset(9).protocol_error()).await;
if cfg!(feature = "ignore_connection_header") {
let settings = client.assert_server_handshake().await;
assert_default_settings!(settings);
client
.send_frame(
frames::headers(1)
.request("GET", "https://example.com/")
.field("connection", "foo")
.eos(),
)
.await;
client
.send_frame(
frames::headers(3)
.request("GET", "https://example.com/")
.field("keep-alive", "5")
.eos(),
)
.await;
client
.send_frame(
frames::headers(5)
.request("GET", "https://example.com/")
.field("proxy-connection", "bar")
.eos(),
)
.await;
client
.send_frame(
frames::headers(7)
.request("GET", "https://example.com/")
.field("upgrade", "HTTP/2")
.eos(),
)
.await;
client
.recv_frame(frames::headers(1).response(200).eos())
.await;
client
.recv_frame(frames::headers(3).response(200).eos())
.await;
client
.recv_frame(frames::headers(5).response(200).eos())
.await;
client
.recv_frame(frames::headers(7).response(200).eos())
.await;
} else {
let settings = client.assert_server_handshake().await;
assert_default_settings!(settings);
client.send_frame(req(1, "connection", "foo")).await;
client.send_frame(req(3, "keep-alive", "5")).await;
client.send_frame(req(5, "proxy-connection", "bar")).await;
client
.send_frame(req(7, "transfer-encoding", "chunked"))
.await;
client.send_frame(req(9, "upgrade", "HTTP/2")).await;
client.recv_frame(frames::reset(1).protocol_error()).await;
client.recv_frame(frames::reset(3).protocol_error()).await;
client.recv_frame(frames::reset(5).protocol_error()).await;
client.recv_frame(frames::reset(7).protocol_error()).await;
client.recv_frame(frames::reset(9).protocol_error()).await;
}
};

let srv = async move {
let mut srv = server::handshake(io).await.expect("handshake");
assert!(srv.next().await.is_none());
if cfg!(feature = "ignore_connection_header") {
while let Some(stream) = srv.next().await {
let (req, mut stream) = stream.unwrap();
// the headers are ignored
assert_eq!(req.headers().len(), 0);
let rsp = http::Response::builder().status(200).body(()).unwrap();
stream.send_response(rsp, true).unwrap();
}
} else {
assert!(srv.next().await.is_none());
}
};

join(client, srv).await;
Expand Down