%% This module is used to test the flushing of messages when
%% switch_protocol is executed by cowboy_http.
-module(switch_protocol_flush_h).
-export([init/3]).
-export([info/3]).
-export([terminate/3]).
-export([takeover/7]).
-export([validate/1]).
init(StreamID, Req, _) ->
Pid = list_to_pid(binary_to_list(cowboy_req:header(<<"x-test-pid">>, Req))),
%% Send ourselves a few messages that may or may not be flushed.
self() ! good,
self() ! {'EXIT', Pid, normal},
self() ! {system, a, b},
self() ! {{self(), StreamID}, hello},
self() ! {'$gen_call', a, b},
self() ! {timeout, make_ref(), ?MODULE},
self() ! {ranch_tcp, socket, <<"123">>},
{[{switch_protocol, #{}, ?MODULE, Pid}], undefined}.
info(_, _, State) ->
{[], State}.
terminate(_, _, _) ->
ok.
takeover(_, _, _, _, _, _, Pid) ->
Msgs = receive_all([]),
Pid ! {Pid, Msgs},
exit(normal).
receive_all(Acc) ->
receive
Msg ->
receive_all([Msg|Acc])
after 0 ->
Acc
end.
validate(Msgs) ->
[
{ranch_tcp, socket, <<"123">>},
{'$gen_call', a, b},
{system, a, b},
good
] = Msgs,
ok.
