Initial HTTP/3 implementationhttp3

This includes Websocket over HTTP/3.

Since quicer, which provides the QUIC implementation,
is a NIF, Cowboy cannot depend directly on it. In order
to enable QUIC and HTTP/3, users have to set the
COWBOY_QUICER environment variable:

  export COWBOY_QUICER=1

In order to run the test suites, the same must be done
for Gun:

  export GUN_QUICER=1

HTTP/3 support is currently not available on Windows
due to compilation issues of quicer which have yet to
be looked at or resolved.

HTTP/3 support is also unavailable on the upcoming
OTP-27 due to compilation errors in quicer dependencies.
Once resolved HTTP/3 should work on OTP-27.

Because of how QUIC currently works, it's possible
that streams that get reset after sending a response
do not receive that response. The test suite was
modified to accomodate for that. A future extension
to QUIC will allow us to gracefully reset streams.

This also updates Erlang.mk.

1 files changed, 10 insertions, 3 deletions

diff --git a/test/plain_handler_SUITE.erl b/test/plain_handler_SUITE.erl
index cd696df..756c0a6 100644
--- a/test/plain_handler_SUITE.erl
+++ b/test/plain_handler_SUITE.erl
@@ -39,7 +39,7 @@ init_per_group(Name, Config) ->
 	cowboy_test:init_common_groups(Name, Config, ?MODULE).
 
 end_per_group(Name, _) ->
-	cowboy:stop_listener(Name).
+	cowboy_test:stop_group(Name).
 
 %% Routes.
 
@@ -58,8 +58,15 @@ crash_after_reply(Config) ->
 	Ref = gun:get(ConnPid, "/crash/reply", [
 		{<<"accept-encoding">>, <<"gzip">>}
 	]),
-	{response, fin, 200, _} = gun:await(ConnPid, Ref),
-	{error, timeout} = gun:await(ConnPid, Ref, 1000),
+	Protocol = config(protocol, Config),
+	_ = case gun:await(ConnPid, Ref) of
+		{response, fin, 200, _} ->
+			{error, timeout} = gun:await(ConnPid, Ref, 1000);
+		%% See maybe_h3_error comment for details.
+		{error, {stream_error, {stream_error, h3_internal_error, _}}}
+				when Protocol =:= http3 ->
+			ok
+	end,
 	gun:close(ConnPid).
 
 crash_before_reply(Config) ->