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"websocket" must be treated in a case insensitive manner for upgrades

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Fixed according to the websocket draft specs.
This commit is contained in:
Loïc Hoguin 2011-10-20 11:30:59 +02:00
parent 70d28ff64d
commit d4088e7a46
1 changed files with 12 additions and 11 deletions
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23
src/cowboy_http_websocket.erl
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@ -74,13 +74,16 @@ upgrade(ListenerPid, Handler, Opts, Req) ->
%% @todo We need a function to properly parse headers according to their ABNF,
%% instead of having ugly code like this case here.
%% @todo Upgrade is a list of products and should be parsed as such.
-spec websocket_upgrade(#state{}, #http_req{}) -> {ok, #state{}, #http_req{}}.
websocket_upgrade(State, Req) ->
{tokens, ConnTokens, Req2}
= cowboy_http_req:parse_header('Connection', Req),
true = lists:member(<<"Upgrade">>, ConnTokens),
{Version, Req3} = cowboy_http_req:header(<<"Sec-Websocket-Version">>, Req2),
websocket_upgrade(Version, State, Req3).
{WS, Req3} = cowboy_http_req:header('Upgrade', Req2),
<<"websocket">> = cowboy_bstr:to_lower(WS),
{Version, Req4} = cowboy_http_req:header(<<"Sec-Websocket-Version">>, Req3),
websocket_upgrade(Version, State, Req4).
%% @todo Handle the Sec-Websocket-Protocol header.
-spec websocket_upgrade(undefined | <<_:8>>, #state{}, #http_req{})
@ -93,25 +96,23 @@ websocket_upgrade(State, Req) ->
%% key only in websocket_handshake/3.
%% @todo Check Origin?
websocket_upgrade(undefined, State, Req) ->
{<<"WebSocket">>, Req2} = cowboy_http_req:header('Upgrade', Req),
{Origin, Req3} = cowboy_http_req:header(<<"Origin">>, Req2),
{Key1, Req4} = cowboy_http_req:header(<<"Sec-Websocket-Key1">>, Req3),
{Key2, Req5} = cowboy_http_req:header(<<"Sec-Websocket-Key2">>, Req4),
{Origin, Req2} = cowboy_http_req:header(<<"Origin">>, Req),
{Key1, Req3} = cowboy_http_req:header(<<"Sec-Websocket-Key1">>, Req2),
{Key2, Req4} = cowboy_http_req:header(<<"Sec-Websocket-Key2">>, Req3),
false = lists:member(undefined, [Origin, Key1, Key2]),
EOP = binary:compile_pattern(<< 255 >>),
{ok, State#state{version=0, origin=Origin, challenge={Key1, Key2},
eop=EOP}, Req5};
eop=EOP}, Req4};
%% Versions 7 and 8. Implementation follows the hybi 7 through 10 drafts.
%% @todo We don't need Origin?
websocket_upgrade(<< Version >>, State, Req)
when Version =:= $7; Version =:= $8 ->
{<<"websocket">>, Req2} = cowboy_http_req:header('Upgrade', Req),
{Origin, Req3} = cowboy_http_req:header(<<"Sec-Websocket-Origin">>, Req2),
{Key, Req4} = cowboy_http_req:header(<<"Sec-Websocket-Key">>, Req3),
{Origin, Req2} = cowboy_http_req:header(<<"Sec-Websocket-Origin">>, Req),
{Key, Req3} = cowboy_http_req:header(<<"Sec-Websocket-Key">>, Req2),
false = lists:member(undefined, [Origin, Key]),
Challenge = hybi_challenge(Key),
{ok, State#state{version=Version - $0, origin=Origin,
challenge=Challenge}, Req4}.
challenge=Challenge}, Req3}.
-spec handler_init(#state{}, #http_req{}) -> ok | none().
handler_init(State=#state{handler=Handler, opts=Opts},