Allow HTTP protocol upgrades to use keepalive

REST needed this to be allowed to chain requests on the same connection.

1 files changed, 28 insertions, 33 deletions

diff --git a/src/cowboy_http_websocket.erl b/src/cowboy_http_websocket.erl
index d40e7af..7013d7f 100644
--- a/src/cowboy_http_websocket.erl
+++ b/src/cowboy_http_websocket.erl
@@ -64,7 +64,7 @@
 %% You do not need to call this function manually. To upgrade to the WebSocket
 %% protocol, you simply need to return <em>{upgrade, protocol, {@module}}</em>
 %% in your <em>cowboy_http_handler:init/3</em> handler function.
--spec upgrade(pid(), module(), any(), #http_req{}) -> ok | none().
+-spec upgrade(pid(), module(), any(), #http_req{}) -> closed | none().
 upgrade(ListenerPid, Handler, Opts, Req) ->
 	cowboy_listener:move_connection(ListenerPid, websocket, self()),
 	case catch websocket_upgrade(#state{handler=Handler, opts=Opts}, Req) of
@@ -113,7 +113,7 @@ websocket_upgrade(Version, State, Req)
 	IntVersion = list_to_integer(binary_to_list(Version)),
 	{ok, State#state{version=IntVersion, challenge=Challenge}, Req2}.
 
--spec handler_init(#state{}, #http_req{}) -> ok | none().
+-spec handler_init(#state{}, #http_req{}) -> closed | none().
 handler_init(State=#state{handler=Handler, opts=Opts},
 		Req=#http_req{transport=Transport}) ->
 	try Handler:websocket_init(Transport:name(), Req, Opts) of
@@ -139,31 +139,27 @@ handler_init(State=#state{handler=Handler, opts=Opts},
 			[Handler, Class, Reason, Opts, Req, erlang:get_stacktrace()])
 	end.
 
--spec upgrade_error(#http_req{}) -> ok.
+-spec upgrade_error(#http_req{}) -> closed.
 upgrade_error(Req) ->
-	{ok, Req2} = cowboy_http_req:reply(400, [], [],
+	{ok, _Req2} = cowboy_http_req:reply(400, [], [],
 		Req#http_req{resp_state=waiting}),
-	upgrade_terminate(Req2).
+	closed.
 
 %% @see cowboy_http_protocol:ensure_response/1
--spec upgrade_denied(#http_req{}) -> ok.
-upgrade_denied(Req=#http_req{resp_state=done}) ->
-	upgrade_terminate(Req);
+-spec upgrade_denied(#http_req{}) -> closed.
+upgrade_denied(#http_req{resp_state=done}) ->
+	closed;
 upgrade_denied(Req=#http_req{resp_state=waiting}) ->
-	{ok, Req2} = cowboy_http_req:reply(400, [], [], Req),
-	upgrade_terminate(Req2);
-upgrade_denied(Req=#http_req{method='HEAD', resp_state=chunks}) ->
-	upgrade_terminate(Req);
-upgrade_denied(Req=#http_req{socket=Socket, transport=Transport,
+	{ok, _Req2} = cowboy_http_req:reply(400, [], [], Req),
+	closed;
+upgrade_denied(#http_req{method='HEAD', resp_state=chunks}) ->
+	closed;
+upgrade_denied(#http_req{socket=Socket, transport=Transport,
 		resp_state=chunks}) ->
 	Transport:send(Socket, <<"0\r\n\r\n">>),
-	upgrade_terminate(Req).
+	closed.
 
--spec upgrade_terminate(#http_req{}) -> ok.
-upgrade_terminate(#http_req{socket=Socket, transport=Transport}) ->
-	Transport:close(Socket).
-
--spec websocket_handshake(#state{}, #http_req{}, any()) -> ok | none().
+-spec websocket_handshake(#state{}, #http_req{}, any()) -> closed | none().
 websocket_handshake(State=#state{version=0, origin=Origin,
 		challenge={Key1, Key2}}, Req=#http_req{socket=Socket,
 		transport=Transport, raw_host=Host, port=Port,
@@ -185,7 +181,7 @@ websocket_handshake(State=#state{version=0, origin=Origin,
 			handler_before_loop(State#state{messages=Transport:messages()},
 				Req3, HandlerState, <<>>);
 		_Any ->
-			ok %% If an error happened reading the body, stop there.
+			closed %% If an error happened reading the body, stop there.
 	end;
 websocket_handshake(State=#state{challenge=Challenge},
 		Req=#http_req{transport=Transport}, HandlerState) ->
@@ -197,7 +193,7 @@ websocket_handshake(State=#state{challenge=Challenge},
 	handler_before_loop(State#state{messages=Transport:messages()},
 		Req2, HandlerState, <<>>).
 
--spec handler_before_loop(#state{}, #http_req{}, any(), binary()) -> ok | none().
+-spec handler_before_loop(#state{}, #http_req{}, any(), binary()) -> closed | none().
 handler_before_loop(State=#state{hibernate=true},
 		Req=#http_req{socket=Socket, transport=Transport},
 		HandlerState, SoFar) ->
@@ -222,7 +218,7 @@ handler_loop_timeout(State=#state{timeout=Timeout, timeout_ref=PrevRef}) ->
 	State#state{timeout_ref=TRef}.
 
 %% @private
--spec handler_loop(#state{}, #http_req{}, any(), binary()) -> ok | none().
+-spec handler_loop(#state{}, #http_req{}, any(), binary()) -> closed | none().
 handler_loop(State=#state{messages={OK, Closed, Error}, timeout_ref=TRef},
 		Req=#http_req{socket=Socket}, HandlerState, SoFar) ->
 	receive
@@ -242,7 +238,7 @@ handler_loop(State=#state{messages={OK, Closed, Error}, timeout_ref=TRef},
 				SoFar, websocket_info, Message, fun handler_before_loop/4)
 	end.
 
--spec websocket_data(#state{}, #http_req{}, any(), binary()) -> ok | none().
+-spec websocket_data(#state{}, #http_req{}, any(), binary()) -> closed | none().
 %% No more data.
 websocket_data(State, Req, HandlerState, <<>>) ->
 	handler_before_loop(State, Req, HandlerState, <<>>);
@@ -296,14 +292,14 @@ websocket_data(State, Req, HandlerState, _Bad) ->
 
 %% hybi unmasking.
 -spec websocket_unmask(#state{}, #http_req{}, any(), binary(),
-	opcode(), binary(), mask_key()) -> ok | none().
+	opcode(), binary(), mask_key()) -> closed | none().
 websocket_unmask(State, Req, HandlerState, RemainingData,
 		Opcode, Payload, MaskKey) ->
 	websocket_unmask(State, Req, HandlerState, RemainingData,
 		Opcode, Payload, MaskKey, <<>>).
 
 -spec websocket_unmask(#state{}, #http_req{}, any(), binary(),
-	opcode(), binary(), mask_key(), binary()) -> ok | none().
+	opcode(), binary(), mask_key(), binary()) -> closed | none().
 websocket_unmask(State, Req, HandlerState, RemainingData,
 		Opcode, << O:32, Rest/bits >>, MaskKey, Acc) ->
 	T = O bxor MaskKey,
@@ -334,7 +330,7 @@ websocket_unmask(State, Req, HandlerState, RemainingData,
 
 %% hybi dispatching.
 -spec websocket_dispatch(#state{}, #http_req{}, any(), binary(),
-	opcode(), binary()) -> ok | none().
+	opcode(), binary()) -> closed | none().
 %% @todo Fragmentation.
 %~ websocket_dispatch(State, Req, HandlerState, RemainingData, 0, Payload) ->
 %% Text frame.
@@ -362,7 +358,7 @@ websocket_dispatch(State, Req, HandlerState, RemainingData, 10, Payload) ->
 		websocket_handle, {pong, Payload}, fun websocket_data/4).
 
 -spec handler_call(#state{}, #http_req{}, any(), binary(),
-	atom(), any(), fun()) -> ok | none().
+	atom(), any(), fun()) -> closed | none().
 handler_call(State=#state{handler=Handler, opts=Opts}, Req, HandlerState,
 		RemainingData, Callback, Message, NextState) ->
 	try Handler:Callback(Message, Req, HandlerState) of
@@ -391,7 +387,7 @@ handler_call(State=#state{handler=Handler, opts=Opts}, Req, HandlerState,
 		websocket_close(State, Req, HandlerState, {error, handler})
 	end.
 
--spec websocket_send(binary(), #state{}, #http_req{}) -> ok | ignore.
+-spec websocket_send(binary(), #state{}, #http_req{}) -> closed | ignore.
 %% hixie-76 text frame.
 websocket_send({text, Payload}, #state{version=0},
 		#http_req{socket=Socket, transport=Transport}) ->
@@ -411,21 +407,19 @@ websocket_send({Type, Payload}, _State,
 	Transport:send(Socket, [<< 1:1, 0:3, Opcode:4, 0:1, Len/bits >>,
 		Payload]).
 
--spec websocket_close(#state{}, #http_req{}, any(), {atom(), atom()}) -> ok.
+-spec websocket_close(#state{}, #http_req{}, any(), {atom(), atom()}) -> closed.
 websocket_close(State=#state{version=0}, Req=#http_req{socket=Socket,
 		transport=Transport}, HandlerState, Reason) ->
 	Transport:send(Socket, << 255, 0 >>),
-	Transport:close(Socket),
 	handler_terminate(State, Req, HandlerState, Reason);
 %% @todo Send a Payload? Using Reason is usually good but we're quite careless.
 websocket_close(State, Req=#http_req{socket=Socket,
 		transport=Transport}, HandlerState, Reason) ->
 	Transport:send(Socket, << 1:1, 0:3, 8:4, 0:8 >>),
-	Transport:close(Socket),
 	handler_terminate(State, Req, HandlerState, Reason).
 
 -spec handler_terminate(#state{}, #http_req{},
-	any(), atom() | {atom(), atom()}) -> ok.
+	any(), atom() | {atom(), atom()}) -> closed.
 handler_terminate(#state{handler=Handler, opts=Opts},
 		Req, HandlerState, TerminateReason) ->
 	try
@@ -438,7 +432,8 @@ handler_terminate(#state{handler=Handler, opts=Opts},
 			"** Request was ~p~n** Stacktrace: ~p~n~n",
 			[Handler, Class, Reason, TerminateReason, Opts,
 			 HandlerState, Req, erlang:get_stacktrace()])
-	end.
+	end,
+	closed.
 
 %% hixie-76 specific.