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-rw-r--r--src/cowboy_websocket.erl25
-rw-r--r--test/handlers/ws_init_h.erl47
-rw-r--r--test/ws_SUITE.erl86
3 files changed, 144 insertions, 14 deletions
diff --git a/src/cowboy_websocket.erl b/src/cowboy_websocket.erl
index e7736fa..690ee60 100644
--- a/src/cowboy_websocket.erl
+++ b/src/cowboy_websocket.erl
@@ -40,8 +40,7 @@
when Req::cowboy_req:req().
-callback websocket_init(State)
- %% @todo Make that call_result/1.
- -> {ok, State} when State::any().
+ -> call_result(State) when State::any().
-optional_callbacks([websocket_init/1]).
-callback websocket_handle({text | binary | ping | pong, binary()}, State)
@@ -170,17 +169,14 @@ websocket_handshake(State=#state{key=Key},
-spec takeover(pid(), ranch:ref(), inet:socket(), module(), any(), binary(),
{#state{}, any()}) -> ok.
takeover(_Parent, Ref, Socket, Transport, _Opts, Buffer,
- {State=#state{handler=Handler}, HandlerState0}) ->
+ {State0=#state{handler=Handler}, HandlerState}) ->
ranch:remove_connection(Ref),
- %% @todo Allow sending a reply from websocket_init.
- %% @todo Try/catch.
- {ok, HandlerState} = case erlang:function_exported(Handler, websocket_init, 1) of
- true -> Handler:websocket_init(HandlerState0);
- false -> {ok, HandlerState0}
- end,
- State2 = handler_loop_timeout(State#state{socket=Socket, transport=Transport}),
- handler_before_loop(State2#state{key=undefined,
- messages=Transport:messages()}, HandlerState, Buffer).
+ State1 = handler_loop_timeout(State0#state{socket=Socket, transport=Transport}),
+ State = State1#state{key=undefined, messages=Transport:messages()},
+ case erlang:function_exported(Handler, websocket_init, 1) of
+ true -> handler_call(State, HandlerState, Buffer, websocket_init, undefined, fun handler_before_loop/3);
+ false -> handler_before_loop(State, HandlerState, Buffer)
+ end.
-spec handler_before_loop(#state{}, any(), binary())
%% @todo Yeah not env.
@@ -317,7 +313,10 @@ websocket_dispatch(State=#state{socket=Socket, transport=Transport, frag_state=F
-> {ok, cowboy_middleware:env()}.
handler_call(State=#state{handler=Handler}, HandlerState,
RemainingData, Callback, Message, NextState) ->
- try Handler:Callback(Message, HandlerState) of
+ try case Callback of
+ websocket_init -> Handler:websocket_init(HandlerState);
+ _ -> Handler:Callback(Message, HandlerState)
+ end of
{ok, HandlerState2} ->
NextState(State, HandlerState2, RemainingData);
{ok, HandlerState2, hibernate} ->
diff --git a/test/handlers/ws_init_h.erl b/test/handlers/ws_init_h.erl
new file mode 100644
index 0000000..08971ae
--- /dev/null
+++ b/test/handlers/ws_init_h.erl
@@ -0,0 +1,47 @@
+%% This module returns a different value in websocket_init/1 depending on the query string.
+
+-module(ws_init_h).
+-behavior(cowboy_websocket).
+
+-export([init/2]).
+-export([websocket_init/1]).
+-export([websocket_handle/2]).
+-export([websocket_info/2]).
+
+init(Req, _) ->
+ State = binary_to_atom(cowboy_req:qs(Req), latin1),
+ {cowboy_websocket, Req, State}.
+
+%% Sleep to make sure the HTTP response was sent.
+websocket_init(State) ->
+ timer:sleep(100),
+ do_websocket_init(State).
+
+do_websocket_init(State=ok) ->
+ {ok, State};
+do_websocket_init(State=ok_hibernate) ->
+ {ok, State, hibernate};
+do_websocket_init(State=reply) ->
+ {reply, {text, "Hello"}, State};
+do_websocket_init(State=reply_hibernate) ->
+ {reply, {text, "Hello"}, State, hibernate};
+do_websocket_init(State=reply_close) ->
+ {reply, close, State};
+do_websocket_init(State=reply_close_hibernate) ->
+ {reply, close, State, hibernate};
+do_websocket_init(State=reply_many) ->
+ {reply, [{text, "Hello"}, {binary, "World"}], State};
+do_websocket_init(State=reply_many_hibernate) ->
+ {reply, [{text, "Hello"}, {binary, "World"}], State, hibernate};
+do_websocket_init(State=reply_many_close) ->
+ {reply, [{text, "Hello"}, close], State};
+do_websocket_init(State=reply_many_close_hibernate) ->
+ {reply, [{text, "Hello"}, close], State, hibernate};
+do_websocket_init(State=stop) ->
+ {stop, State}.
+
+websocket_handle(_, State) ->
+ {ok, State}.
+
+websocket_info(_, State) ->
+ {ok, State}.
diff --git a/test/ws_SUITE.erl b/test/ws_SUITE.erl
index dafc402..a908a81 100644
--- a/test/ws_SUITE.erl
+++ b/test/ws_SUITE.erl
@@ -60,6 +60,7 @@ init_dispatch() ->
{"localhost", [
{"/ws_echo", ws_echo, []},
{"/ws_echo_timer", ws_echo_timer, []},
+ {"/ws_init", ws_init_h, []},
{"/ws_init_shutdown", ws_init_shutdown, []},
{"/ws_send_many", ws_send_many, [
{sequence, [
@@ -184,7 +185,90 @@ do_ws_version(Socket) ->
{error, closed} = gen_tcp:recv(Socket, 0, 6000),
ok.
-ws_init_shutdown(Config) ->
+ws_init_return_ok(Config) ->
+ doc("Handler does nothing."),
+ {ok, Socket, _} = do_handshake("/ws_init?ok", Config),
+ %% The handler does nothing; nothing should happen here.
+ {error, timeout} = gen_tcp:recv(Socket, 0, 1000),
+ ok.
+
+ws_init_return_ok_hibernate(Config) ->
+ doc("Handler does nothing; hibernates."),
+ {ok, Socket, _} = do_handshake("/ws_init?ok_hibernate", Config),
+ %% The handler does nothing; nothing should happen here.
+ {error, timeout} = gen_tcp:recv(Socket, 0, 1000),
+ ok.
+
+ws_init_return_reply(Config) ->
+ doc("Handler sends a text frame just after the handshake."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply", Config),
+ {ok, << 1:1, 0:3, 1:4, 0:1, 5:7, "Hello" >>} = gen_tcp:recv(Socket, 0, 6000),
+ ok.
+
+ws_init_return_reply_hibernate(Config) ->
+ doc("Handler sends a text frame just after the handshake and then hibernates."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply_hibernate", Config),
+ {ok, << 1:1, 0:3, 1:4, 0:1, 5:7, "Hello" >>} = gen_tcp:recv(Socket, 0, 6000),
+ ok.
+
+ws_init_return_reply_close(Config) ->
+ doc("Handler closes immediately after the handshake."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply_close", Config),
+ {ok, << 1:1, 0:3, 8:4, 0:8 >>} = gen_tcp:recv(Socket, 0, 6000),
+ {error, closed} = gen_tcp:recv(Socket, 0, 6000),
+ ok.
+
+ws_init_return_reply_close_hibernate(Config) ->
+ doc("Handler closes immediately after the handshake, then attempts to hibernate."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply_close_hibernate", Config),
+ {ok, << 1:1, 0:3, 8:4, 0:8 >>} = gen_tcp:recv(Socket, 0, 6000),
+ {error, closed} = gen_tcp:recv(Socket, 0, 6000),
+ ok.
+
+ws_init_return_reply_many(Config) ->
+ doc("Handler sends many frames just after the handshake."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply_many", Config),
+ %% We catch all frames at once and check them directly.
+ {ok, <<
+ 1:1, 0:3, 1:4, 0:1, 5:7, "Hello",
+ 1:1, 0:3, 2:4, 0:1, 5:7, "World" >>} = gen_tcp:recv(Socket, 14, 6000),
+ ok.
+
+ws_init_return_reply_many_hibernate(Config) ->
+ doc("Handler sends many frames just after the handshake and then hibernates."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply_many_hibernate", Config),
+ %% We catch all frames at once and check them directly.
+ {ok, <<
+ 1:1, 0:3, 1:4, 0:1, 5:7, "Hello",
+ 1:1, 0:3, 2:4, 0:1, 5:7, "World" >>} = gen_tcp:recv(Socket, 14, 6000),
+ ok.
+
+ws_init_return_reply_many_close(Config) ->
+ doc("Handler sends many frames including a close frame just after the handshake."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply_many_close", Config),
+ %% We catch all frames at once and check them directly.
+ {ok, <<
+ 1:1, 0:3, 1:4, 0:1, 5:7, "Hello",
+ 1:1, 0:3, 8:4, 0:8 >>} = gen_tcp:recv(Socket, 9, 6000),
+ ok.
+
+ws_init_return_reply_many_close_hibernate(Config) ->
+ doc("Handler sends many frames including a close frame just after the handshake and then hibernates."),
+ {ok, Socket, _} = do_handshake("/ws_init?reply_many_close_hibernate", Config),
+ %% We catch all frames at once and check them directly.
+ {ok, <<
+ 1:1, 0:3, 1:4, 0:1, 5:7, "Hello",
+ 1:1, 0:3, 8:4, 0:8 >>} = gen_tcp:recv(Socket, 9, 6000),
+ ok.
+
+ws_init_return_stop(Config) ->
+ doc("Handler closes immediately after the handshake."),
+ {ok, Socket, _} = do_handshake("/ws_init?stop", Config),
+ {ok, << 1:1, 0:3, 8:4, 0:1, 2:7, 1000:16 >>} = gen_tcp:recv(Socket, 0, 6000),
+ {error, closed} = gen_tcp:recv(Socket, 0, 6000),
+ ok.
+
+ws_init_shutdown_before_handshake(Config) ->
doc("Handler stops before Websocket handshake."),
{ok, Socket} = gen_tcp:connect("localhost", config(port, Config), [binary, {active, false}]),
ok = gen_tcp:send(Socket, [