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authorLoïc Hoguin <[email protected]>2011-12-08 18:30:13 +0100
committerLoïc Hoguin <[email protected]>2011-12-08 18:30:13 +0100
commit8d2102fe1174d5fb82d80ca3beba83b9d5bbb238 (patch)
tree0197df52297c60b63f1af303e0a7ea84781f8ac1 /src
parent7f46e5343625ba32b6e93e6a9a1ba76b4447b7a8 (diff)
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Allow HTTP protocol upgrades to use keepalive
REST needed this to be allowed to chain requests on the same connection.
Diffstat (limited to 'src')
-rw-r--r--src/cowboy_http_protocol.erl30
-rw-r--r--src/cowboy_http_rest.erl8
-rw-r--r--src/cowboy_http_websocket.erl61
3 files changed, 54 insertions, 45 deletions
diff --git a/src/cowboy_http_protocol.erl b/src/cowboy_http_protocol.erl
index 54df29f..3a6522f 100644
--- a/src/cowboy_http_protocol.erl
+++ b/src/cowboy_http_protocol.erl
@@ -219,8 +219,8 @@ dispatch(Next, Req=#http_req{host=Host, path=Path},
end.
-spec handler_init(#http_req{}, #state{}) -> ok | none().
-handler_init(Req, State=#state{listener=ListenerPid,
- transport=Transport, handler={Handler, Opts}}) ->
+handler_init(Req, State=#state{transport=Transport,
+ handler={Handler, Opts}}) ->
try Handler:init({Transport:name(), http}, Req, Opts) of
{ok, Req2, HandlerState} ->
handler_handle(HandlerState, Req2, State);
@@ -239,7 +239,7 @@ handler_init(Req, State=#state{listener=ListenerPid,
handler_terminate(HandlerState, Req2, State);
%% @todo {upgrade, transport, Module}
{upgrade, protocol, Module} ->
- Module:upgrade(ListenerPid, Handler, Opts, Req)
+ upgrade_protocol(Req, State, Module)
catch Class:Reason ->
error_terminate(500, State),
error_logger:error_msg(
@@ -250,11 +250,19 @@ handler_init(Req, State=#state{listener=ListenerPid,
[Handler, Class, Reason, Opts, Req, erlang:get_stacktrace()])
end.
+-spec upgrade_protocol(#http_req{}, #state{}, atom()) -> ok | none().
+upgrade_protocol(Req, State=#state{listener=ListenerPid,
+ handler={Handler, Opts}}, Module) ->
+ case Module:upgrade(ListenerPid, Handler, Opts, Req) of
+ {UpgradeRes, Req2} -> next_request(Req2, State, UpgradeRes);
+ _Any -> terminate(State)
+ end.
+
-spec handler_handle(any(), #http_req{}, #state{}) -> ok | none().
handler_handle(HandlerState, Req, State=#state{handler={Handler, Opts}}) ->
try Handler:handle(Req, HandlerState) of
{ok, Req2, HandlerState2} ->
- next_request(HandlerState2, Req2, State)
+ terminate_request(HandlerState2, Req2, State)
catch Class:Reason ->
error_logger:error_msg(
"** Handler ~p terminating in handle/2~n"
@@ -294,7 +302,7 @@ handler_loop_timeout(State=#state{loop_timeout=Timeout,
handler_loop(HandlerState, Req, State=#state{loop_timeout_ref=TRef}) ->
receive
{?MODULE, timeout, TRef} ->
- next_request(HandlerState, Req, State);
+ terminate_request(HandlerState, Req, State);
{?MODULE, timeout, OlderTRef} when is_reference(OlderTRef) ->
handler_loop(HandlerState, Req, State);
Message ->
@@ -306,7 +314,7 @@ handler_call(HandlerState, Req, State=#state{handler={Handler, Opts}},
Message) ->
try Handler:info(Message, Req, HandlerState) of
{ok, Req2, HandlerState2} ->
- next_request(HandlerState2, Req2, State);
+ terminate_request(HandlerState2, Req2, State);
{loop, Req2, HandlerState2} ->
handler_before_loop(HandlerState2, Req2, State);
{loop, Req2, HandlerState2, hibernate} ->
@@ -336,10 +344,14 @@ handler_terminate(HandlerState, Req, #state{handler={Handler, Opts}}) ->
HandlerState, Req, erlang:get_stacktrace()])
end.
--spec next_request(any(), #http_req{}, #state{}) -> ok | none().
-next_request(HandlerState, Req=#http_req{connection=Conn, buffer=Buffer},
- State) ->
+-spec terminate_request(any(), #http_req{}, #state{}) -> ok | none().
+terminate_request(HandlerState, Req, State) ->
HandlerRes = handler_terminate(HandlerState, Req, State),
+ next_request(Req, State, HandlerRes).
+
+-spec next_request(#http_req{}, #state{}, any()) -> ok | none().
+next_request(Req=#http_req{connection=Conn, buffer=Buffer},
+ State, HandlerRes) ->
BodyRes = ensure_body_processed(Req),
RespRes = ensure_response(Req),
case {HandlerRes, BodyRes, RespRes, Conn} of
diff --git a/src/cowboy_http_rest.erl b/src/cowboy_http_rest.erl
index 9bb66fa..3ef730f 100644
--- a/src/cowboy_http_rest.erl
+++ b/src/cowboy_http_rest.erl
@@ -53,7 +53,7 @@
%% You do not need to call this function manually. To upgrade to the REST
%% 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.
+-spec upgrade(pid(), module(), any(), #http_req{}) -> {ok, #http_req{}}.
upgrade(_ListenerPid, Handler, Opts, Req) ->
try
case erlang:function_exported(Handler, rest_init, 2) of
@@ -753,6 +753,8 @@ respond(Req, State, StatusCode) ->
terminate(Req, #state{handler=Handler, handler_state=HandlerState}) ->
case erlang:function_exported(Handler, rest_terminate, 2) of
- true -> ok = Handler:rest_terminate(Req, HandlerState);
+ true -> ok = Handler:rest_terminate(
+ Req#http_req{resp_state=locked}, HandlerState);
false -> ok
- end.
+ end,
+ {ok, Req}.
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.