mirror of
https://github.com/ninenines/cowboy.git
synced 2025-07-14 20:30:23 +00:00
Merge branch 'fix/websocket-inflate-unmask' of git://github.com/soundrop/cowboy
This commit is contained in:
Loïc Hoguin
commit
ddefa33a38
2 changed files with 173 additions and 61 deletions
|
|
@ -57,9 +57,8 @@
|
|||
frag_state = undefined :: frag_state(),
|
||||
utf8_state = <<>> :: binary(),
|
||||
deflate_frame = false :: boolean(),
|
||||
inflate_state :: any(),
|
||||
inflate_buffer = <<>> :: binary(),
|
||||
deflate_state :: any()
|
||||
inflate_state :: undefined | port(),
|
||||
deflate_state :: undefined | port()
|
||||
}).
|
||||
|
||||
%% @doc Upgrade an HTTP request to the Websocket protocol.
|
||||
|
|
@ -121,7 +120,6 @@ websocket_extensions(State, Req) ->
|
|||
{ok, State#state{
|
||||
deflate_frame = true,
|
||||
inflate_state = Inflate,
|
||||
inflate_buffer = <<>>,
|
||||
deflate_state = Deflate
|
||||
}, Req2};
|
||||
_ ->
|
||||
|
|
@ -331,45 +329,49 @@ websocket_data(State, Req, HandlerState, Data) ->
|
|||
websocket_data(State=#state{frag_state=undefined}, Req, HandlerState,
|
||||
Opcode, Len, MaskKey, Data, Rsv, 0) ->
|
||||
websocket_payload(State#state{frag_state={nofin, Opcode, <<>>}},
|
||||
Req, HandlerState, 0, Len, MaskKey, <<>>, Data, Rsv);
|
||||
Req, HandlerState, 0, Len, MaskKey, <<>>, 0, Data, Rsv);
|
||||
%% Subsequent frame fragments.
|
||||
websocket_data(State=#state{frag_state={nofin, _, _}}, Req, HandlerState,
|
||||
0, Len, MaskKey, Data, Rsv, 0) ->
|
||||
websocket_payload(State, Req, HandlerState,
|
||||
0, Len, MaskKey, <<>>, Data, Rsv);
|
||||
0, Len, MaskKey, <<>>, 0, Data, Rsv);
|
||||
%% Final frame fragment.
|
||||
websocket_data(State=#state{frag_state={nofin, Opcode, SoFar}},
|
||||
Req, HandlerState, 0, Len, MaskKey, Data, Rsv, 1) ->
|
||||
websocket_payload(State#state{frag_state={fin, Opcode, SoFar}},
|
||||
Req, HandlerState, 0, Len, MaskKey, <<>>, Data, Rsv);
|
||||
Req, HandlerState, 0, Len, MaskKey, <<>>, 0, Data, Rsv);
|
||||
%% Unfragmented frame.
|
||||
websocket_data(State, Req, HandlerState, Opcode, Len, MaskKey, Data, Rsv, 1) ->
|
||||
websocket_payload(State, Req, HandlerState,
|
||||
Opcode, Len, MaskKey, <<>>, Data, Rsv).
|
||||
Opcode, Len, MaskKey, <<>>, 0, Data, Rsv).
|
||||
|
||||
-spec websocket_payload(#state{}, Req, any(),
|
||||
opcode(), non_neg_integer(), mask_key(), binary(), binary(), rsv())
|
||||
opcode(), non_neg_integer(), mask_key(), binary(), non_neg_integer(),
|
||||
binary(), rsv())
|
||||
-> {ok, Req, cowboy_middleware:env()}
|
||||
| {suspend, module(), atom(), [any()]}
|
||||
when Req::cowboy_req:req().
|
||||
%% Close control frames with a payload MUST contain a valid close code.
|
||||
websocket_payload(State, Req, HandlerState,
|
||||
Opcode=8, Len, MaskKey, <<>>, << MaskedCode:2/binary, Rest/bits >>, Rsv) ->
|
||||
Opcode=8, Len, MaskKey, <<>>, 0,
|
||||
<< MaskedCode:2/binary, Rest/bits >>, Rsv) ->
|
||||
Unmasked = << Code:16 >> = websocket_unmask(MaskedCode, MaskKey, <<>>),
|
||||
if Code < 1000; Code =:= 1004; Code =:= 1005; Code =:= 1006;
|
||||
(Code > 1011) and (Code < 3000); Code > 4999 ->
|
||||
websocket_close(State, Req, HandlerState, {error, badframe});
|
||||
true ->
|
||||
websocket_payload(State, Req, HandlerState,
|
||||
Opcode, Len - 2, MaskKey, Unmasked, Rest, Rsv)
|
||||
Opcode, Len - 2, MaskKey, Unmasked, byte_size(MaskedCode),
|
||||
Rest, Rsv)
|
||||
end;
|
||||
%% Text frames and close control frames MUST have a payload that is valid UTF-8.
|
||||
websocket_payload(State=#state{utf8_state=Incomplete},
|
||||
Req, HandlerState, Opcode, Len, MaskKey, Unmasked, Data, Rsv)
|
||||
Req, HandlerState, Opcode, Len, MaskKey, Unmasked, UnmaskedLen,
|
||||
Data, Rsv)
|
||||
when (byte_size(Data) < Len) andalso ((Opcode =:= 1) orelse
|
||||
((Opcode =:= 8) andalso (Unmasked =/= <<>>))) ->
|
||||
Unmasked2 = websocket_unmask(Data,
|
||||
rotate_mask_key(MaskKey, byte_size(Unmasked)), <<>>),
|
||||
rotate_mask_key(MaskKey, UnmaskedLen), <<>>),
|
||||
{Unmasked3, State2} = websocket_inflate_frame(Unmasked2, Rsv, false, State),
|
||||
case is_utf8(<< Incomplete/binary, Unmasked3/binary >>) of
|
||||
false ->
|
||||
|
|
@ -377,14 +379,16 @@ websocket_payload(State=#state{utf8_state=Incomplete},
|
|||
Utf8State ->
|
||||
websocket_payload_loop(State2#state{utf8_state=Utf8State},
|
||||
Req, HandlerState, Opcode, Len - byte_size(Data), MaskKey,
|
||||
<< Unmasked/binary, Unmasked3/binary >>, Rsv)
|
||||
<< Unmasked/binary, Unmasked3/binary >>,
|
||||
UnmaskedLen + byte_size(Data), Rsv)
|
||||
end;
|
||||
websocket_payload(State=#state{utf8_state=Incomplete},
|
||||
Req, HandlerState, Opcode, Len, MaskKey, Unmasked, Data, Rsv)
|
||||
Req, HandlerState, Opcode, Len, MaskKey, Unmasked, UnmaskedLen,
|
||||
Data, Rsv)
|
||||
when Opcode =:= 1; (Opcode =:= 8) and (Unmasked =/= <<>>) ->
|
||||
<< End:Len/binary, Rest/bits >> = Data,
|
||||
Unmasked2 = websocket_unmask(End,
|
||||
rotate_mask_key(MaskKey, byte_size(Unmasked)), <<>>),
|
||||
rotate_mask_key(MaskKey, UnmaskedLen), <<>>),
|
||||
{Unmasked3, State2} = websocket_inflate_frame(Unmasked2, Rsv, true, State),
|
||||
case is_utf8(<< Incomplete/binary, Unmasked3/binary >>) of
|
||||
<<>> ->
|
||||
|
|
@ -396,10 +400,11 @@ websocket_payload(State=#state{utf8_state=Incomplete},
|
|||
end;
|
||||
%% Fragmented text frames may cut payload in the middle of UTF-8 codepoints.
|
||||
websocket_payload(State=#state{frag_state={_, 1, _}, utf8_state=Incomplete},
|
||||
Req, HandlerState, Opcode=0, Len, MaskKey, Unmasked, Data, Rsv)
|
||||
Req, HandlerState, Opcode=0, Len, MaskKey, Unmasked, UnmaskedLen,
|
||||
Data, Rsv)
|
||||
when byte_size(Data) < Len ->
|
||||
Unmasked2 = websocket_unmask(Data,
|
||||
rotate_mask_key(MaskKey, byte_size(Unmasked)), <<>>),
|
||||
rotate_mask_key(MaskKey, UnmaskedLen), <<>>),
|
||||
{Unmasked3, State2} = websocket_inflate_frame(Unmasked2, Rsv, false, State),
|
||||
case is_utf8(<< Incomplete/binary, Unmasked3/binary >>) of
|
||||
false ->
|
||||
|
|
@ -407,14 +412,16 @@ websocket_payload(State=#state{frag_state={_, 1, _}, utf8_state=Incomplete},
|
|||
Utf8State ->
|
||||
websocket_payload_loop(State2#state{utf8_state=Utf8State},
|
||||
Req, HandlerState, Opcode, Len - byte_size(Data), MaskKey,
|
||||
<< Unmasked/binary, Unmasked3/binary >>, Rsv)
|
||||
<< Unmasked/binary, Unmasked3/binary >>,
|
||||
UnmaskedLen + byte_size(Data), Rsv)
|
||||
end;
|
||||
websocket_payload(State=#state{frag_state={Fin, 1, _}, utf8_state=Incomplete},
|
||||
Req, HandlerState, Opcode=0, Len, MaskKey, Unmasked, Data, Rsv) ->
|
||||
Req, HandlerState, Opcode=0, Len, MaskKey, Unmasked, UnmaskedLen,
|
||||
Data, Rsv) ->
|
||||
<< End:Len/binary, Rest/bits >> = Data,
|
||||
Unmasked2 = websocket_unmask(End,
|
||||
rotate_mask_key(MaskKey, byte_size(Unmasked)), <<>>),
|
||||
{Unmasked3, State2} = websocket_inflate_frame(Unmasked2, Rsv, true, State),
|
||||
rotate_mask_key(MaskKey, UnmaskedLen), <<>>),
|
||||
{Unmasked3, State2} = websocket_inflate_frame(Unmasked2, Rsv, Fin =:= fin, State),
|
||||
case is_utf8(<< Incomplete/binary, Unmasked3/binary >>) of
|
||||
<<>> ->
|
||||
websocket_dispatch(State2#state{utf8_state= <<>>},
|
||||
|
|
@ -429,20 +436,23 @@ websocket_payload(State=#state{frag_state={Fin, 1, _}, utf8_state=Incomplete},
|
|||
end;
|
||||
%% Other frames have a binary payload.
|
||||
websocket_payload(State, Req, HandlerState,
|
||||
Opcode, Len, MaskKey, Unmasked, Data, Rsv)
|
||||
Opcode, Len, MaskKey, Unmasked, UnmaskedLen, Data, Rsv)
|
||||
when byte_size(Data) < Len ->
|
||||
Unmasked2 = websocket_unmask(Data,
|
||||
rotate_mask_key(MaskKey, byte_size(Unmasked)), Unmasked),
|
||||
rotate_mask_key(MaskKey, UnmaskedLen), <<>>),
|
||||
{Unmasked3, State2} = websocket_inflate_frame(Unmasked2, Rsv, false, State),
|
||||
websocket_payload_loop(State2, Req, HandlerState,
|
||||
Opcode, Len - byte_size(Data), MaskKey, Unmasked3, Rsv);
|
||||
Opcode, Len - byte_size(Data), MaskKey,
|
||||
<< Unmasked/binary, Unmasked3/binary >>, UnmaskedLen + byte_size(Data),
|
||||
Rsv);
|
||||
websocket_payload(State, Req, HandlerState,
|
||||
Opcode, Len, MaskKey, Unmasked, Data, Rsv) ->
|
||||
Opcode, Len, MaskKey, Unmasked, UnmaskedLen, Data, Rsv) ->
|
||||
<< End:Len/binary, Rest/bits >> = Data,
|
||||
Unmasked2 = websocket_unmask(End,
|
||||
rotate_mask_key(MaskKey, byte_size(Unmasked)), Unmasked),
|
||||
rotate_mask_key(MaskKey, UnmaskedLen), <<>>),
|
||||
{Unmasked3, State2} = websocket_inflate_frame(Unmasked2, Rsv, true, State),
|
||||
websocket_dispatch(State2, Req, HandlerState, Rest, Opcode, Unmasked3).
|
||||
websocket_dispatch(State2, Req, HandlerState, Rest, Opcode,
|
||||
<< Unmasked/binary, Unmasked3/binary >>).
|
||||
|
||||
-spec websocket_inflate_frame(binary(), rsv(), boolean(), #state{}) ->
|
||||
{binary(), #state{}}.
|
||||
|
|
@ -450,14 +460,13 @@ websocket_inflate_frame(Data, << Rsv1:1, _:2 >>, _,
|
|||
#state{deflate_frame = DeflateFrame} = State)
|
||||
when DeflateFrame =:= false orelse Rsv1 =:= 0 ->
|
||||
{Data, State};
|
||||
websocket_inflate_frame(Data, << 1:1, _:2 >>, false,
|
||||
#state{inflate_buffer = Buffer} = State) ->
|
||||
{<<>>, State#state{inflate_buffer = << Buffer/binary, Data/binary >>}};
|
||||
websocket_inflate_frame(Data, << 1:1, _:2 >>, true,
|
||||
#state{inflate_state = Inflate, inflate_buffer = Buffer} = State) ->
|
||||
Deflated = << Buffer/binary, Data/binary, 0:8, 0:8, 255:8, 255:8 >>,
|
||||
Result = zlib:inflate(Inflate, Deflated),
|
||||
{iolist_to_binary(Result), State#state{inflate_buffer = <<>>}}.
|
||||
websocket_inflate_frame(Data, << 1:1, _:2 >>, false, State) ->
|
||||
Result = zlib:inflate(State#state.inflate_state, Data),
|
||||
{iolist_to_binary(Result), State};
|
||||
websocket_inflate_frame(Data, << 1:1, _:2 >>, true, State) ->
|
||||
Result = zlib:inflate(State#state.inflate_state,
|
||||
<< Data/binary, 0:8, 0:8, 255:8, 255:8 >>),
|
||||
{iolist_to_binary(Result), State}.
|
||||
|
||||
-spec websocket_unmask(B, mask_key(), B) -> B when B::binary().
|
||||
websocket_unmask(<<>>, _, Unmasked) ->
|
||||
|
|
@ -516,19 +525,20 @@ is_utf8(_) ->
|
|||
false.
|
||||
|
||||
-spec websocket_payload_loop(#state{}, Req, any(),
|
||||
opcode(), non_neg_integer(), mask_key(), binary(), rsv())
|
||||
opcode(), non_neg_integer(), mask_key(), binary(),
|
||||
non_neg_integer(), rsv())
|
||||
-> {ok, Req, cowboy_middleware:env()}
|
||||
| {suspend, module(), atom(), [any()]}
|
||||
when Req::cowboy_req:req().
|
||||
websocket_payload_loop(State=#state{socket=Socket, transport=Transport,
|
||||
messages={OK, Closed, Error}, timeout_ref=TRef},
|
||||
Req, HandlerState, Opcode, Len, MaskKey, Unmasked, Rsv) ->
|
||||
Req, HandlerState, Opcode, Len, MaskKey, Unmasked, UnmaskedLen, Rsv) ->
|
||||
Transport:setopts(Socket, [{active, once}]),
|
||||
receive
|
||||
{OK, Socket, Data} ->
|
||||
State2 = handler_loop_timeout(State),
|
||||
websocket_payload(State2, Req, HandlerState,
|
||||
Opcode, Len, MaskKey, Unmasked, Data, Rsv);
|
||||
Opcode, Len, MaskKey, Unmasked, UnmaskedLen, Data, Rsv);
|
||||
{Closed, Socket} ->
|
||||
handler_terminate(State, Req, HandlerState, {error, closed});
|
||||
{Error, Socket, Reason} ->
|
||||
|
|
@ -537,13 +547,13 @@ websocket_payload_loop(State=#state{socket=Socket, transport=Transport,
|
|||
websocket_close(State, Req, HandlerState, {normal, timeout});
|
||||
{timeout, OlderTRef, ?MODULE} when is_reference(OlderTRef) ->
|
||||
websocket_payload_loop(State, Req, HandlerState,
|
||||
Opcode, Len, MaskKey, Unmasked, Rsv);
|
||||
Opcode, Len, MaskKey, Unmasked, UnmaskedLen, Rsv);
|
||||
Message ->
|
||||
handler_call(State, Req, HandlerState,
|
||||
<<>>, websocket_info, Message,
|
||||
fun (State2, Req2, HandlerState2, _) ->
|
||||
websocket_payload_loop(State2, Req2, HandlerState2,
|
||||
Opcode, Len, MaskKey, Unmasked, Rsv)
|
||||
Opcode, Len, MaskKey, Unmasked, UnmaskedLen, Rsv)
|
||||
end)
|
||||
end.
|
||||
|
||||
|
|
@ -665,7 +675,8 @@ websocket_opcode(close) -> 8;
|
|||
websocket_opcode(ping) -> 9;
|
||||
websocket_opcode(pong) -> 10.
|
||||
|
||||
-spec websocket_deflate_frame(opcode(), binary(), #state{}) -> {binary(), <<_:3>>, #state{}}.
|
||||
-spec websocket_deflate_frame(opcode(), binary(), #state{}) ->
|
||||
{binary(), rsv(), #state{}}.
|
||||
websocket_deflate_frame(Opcode, Payload,
|
||||
State=#state{deflate_frame = DeflateFrame})
|
||||
when DeflateFrame =:= false orelse Opcode >= 8 ->
|
||||
|
|
|
|||
|
|
@ -31,6 +31,8 @@
|
|||
-export([ws8_single_bytes/1]).
|
||||
-export([ws13/1]).
|
||||
-export([ws_deflate/1]).
|
||||
-export([ws_deflate_chunks/1]).
|
||||
-export([ws_deflate_fragments/1]).
|
||||
-export([ws_send_close/1]).
|
||||
-export([ws_send_close_payload/1]).
|
||||
-export([ws_send_many/1]).
|
||||
|
|
@ -53,6 +55,8 @@ groups() ->
|
|||
ws8_single_bytes,
|
||||
ws13,
|
||||
ws_deflate,
|
||||
ws_deflate_chunks,
|
||||
ws_deflate_fragments,
|
||||
ws_send_close,
|
||||
ws_send_close_payload,
|
||||
ws_send_many,
|
||||
|
|
@ -315,7 +319,7 @@ ws13(Config) ->
|
|||
ws_deflate(Config) ->
|
||||
{port, Port} = lists:keyfind(port, 1, Config),
|
||||
{ok, Socket} = gen_tcp:connect("localhost", Port,
|
||||
[binary, {active, false}, {packet, raw}]),
|
||||
[binary, {active, false}, {packet, raw}, {nodelay, true}]),
|
||||
ok = gen_tcp:send(Socket, [
|
||||
"GET /ws_echo HTTP/1.1\r\n"
|
||||
"Host: localhost\r\n"
|
||||
|
|
@ -338,25 +342,104 @@ ws_deflate(Config) ->
|
|||
{"sec-websocket-extensions", "x-webkit-deflate-frame"}
|
||||
= lists:keyfind("sec-websocket-extensions", 1, Headers),
|
||||
|
||||
% send uncompressed text frame containing the Hello string
|
||||
ok = gen_tcp:send(Socket, << 16#81, 16#85, 16#37, 16#fa, 16#21, 16#3d,
|
||||
16#7f, 16#9f, 16#4d, 16#51, 16#58 >>),
|
||||
Mask = 16#11223344,
|
||||
Hello = << 242, 72, 205, 201, 201, 7, 0 >>,
|
||||
MaskedHello = websocket_mask(Hello, Mask, <<>>),
|
||||
|
||||
% send compressed text frame containing the Hello string
|
||||
ok = gen_tcp:send(Socket, << 1:1, 1:1, 0:2, 1:4, 1:1, 7:7, Mask:32,
|
||||
MaskedHello/binary >>),
|
||||
% receive compressed text frame containing the Hello string
|
||||
{ok, << 1:1, 1:1, 0:2, 1:4, 0:1, 7:7, 242, 72, 205, 201, 201, 7, 0 >>}
|
||||
{ok, << 1:1, 1:1, 0:2, 1:4, 0:1, 7:7, Hello/binary >>}
|
||||
= gen_tcp:recv(Socket, 0, 6000),
|
||||
|
||||
% send uncompressed text frame containing the HelloHello string
|
||||
ok = gen_tcp:send(Socket, << 1:1, 0:3, 8:4, 1:1, 0:7, 0:32 >>), %% close
|
||||
{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_deflate_chunks(Config) ->
|
||||
{port, Port} = lists:keyfind(port, 1, Config),
|
||||
{ok, Socket} = gen_tcp:connect("localhost", Port,
|
||||
[binary, {active, false}, {packet, raw}, {nodelay, true}]),
|
||||
ok = gen_tcp:send(Socket, [
|
||||
"GET /ws_echo HTTP/1.1\r\n"
|
||||
"Host: localhost\r\n"
|
||||
"Connection: Upgrade\r\n"
|
||||
"Upgrade: websocket\r\n"
|
||||
"Sec-WebSocket-Origin: http://localhost\r\n"
|
||||
"Sec-WebSocket-Version: 8\r\n"
|
||||
"Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==\r\n"
|
||||
"Sec-WebSocket-Extensions: x-webkit-deflate-frame\r\n"
|
||||
"\r\n"]),
|
||||
{ok, Handshake} = gen_tcp:recv(Socket, 0, 6000),
|
||||
{ok, {http_response, {1, 1}, 101, "Switching Protocols"}, Rest}
|
||||
= erlang:decode_packet(http, Handshake, []),
|
||||
[Headers, <<>>] = websocket_headers(
|
||||
erlang:decode_packet(httph, Rest, []), []),
|
||||
{'Connection', "Upgrade"} = lists:keyfind('Connection', 1, Headers),
|
||||
{'Upgrade', "websocket"} = lists:keyfind('Upgrade', 1, Headers),
|
||||
{"sec-websocket-accept", "s3pPLMBiTxaQ9kYGzzhZRbK+xOo="}
|
||||
= lists:keyfind("sec-websocket-accept", 1, Headers),
|
||||
{"sec-websocket-extensions", "x-webkit-deflate-frame"}
|
||||
= lists:keyfind("sec-websocket-extensions", 1, Headers),
|
||||
|
||||
Mask = 16#11223344,
|
||||
Hello = << 242, 72, 205, 201, 201, 7, 0 >>,
|
||||
MaskedHello = websocket_mask(Hello, Mask, <<>>),
|
||||
|
||||
% send compressed text frame containing the Hello string
|
||||
ok = gen_tcp:send(Socket, << 1:1, 1:1, 0:2, 1:4, 1:1, 7:7, Mask:32,
|
||||
(binary:part(MaskedHello, 0, 4))/binary >>),
|
||||
ok = timer:sleep(100),
|
||||
ok = gen_tcp:send(Socket, binary:part(MaskedHello, 4, 3)),
|
||||
|
||||
% receive compressed text frame containing the Hello string
|
||||
{ok, << 1:1, 1:1, 0:2, 1:4, 0:1, 7:7, Hello/binary >>}
|
||||
= gen_tcp:recv(Socket, 0, 6000),
|
||||
|
||||
ok = gen_tcp:send(Socket, << 1:1, 0:3, 8:4, 1:1, 0:7, 0:32 >>), %% close
|
||||
{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_deflate_fragments(Config) ->
|
||||
{port, Port} = lists:keyfind(port, 1, Config),
|
||||
{ok, Socket} = gen_tcp:connect("localhost", Port,
|
||||
[binary, {active, false}, {packet, raw}, {nodelay, true}]),
|
||||
ok = gen_tcp:send(Socket, [
|
||||
"GET /ws_echo HTTP/1.1\r\n"
|
||||
"Host: localhost\r\n"
|
||||
"Connection: Upgrade\r\n"
|
||||
"Upgrade: websocket\r\n"
|
||||
"Sec-WebSocket-Origin: http://localhost\r\n"
|
||||
"Sec-WebSocket-Version: 8\r\n"
|
||||
"Sec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==\r\n"
|
||||
"Sec-WebSocket-Extensions: x-webkit-deflate-frame\r\n"
|
||||
"\r\n"]),
|
||||
{ok, Handshake} = gen_tcp:recv(Socket, 0, 6000),
|
||||
{ok, {http_response, {1, 1}, 101, "Switching Protocols"}, Rest}
|
||||
= erlang:decode_packet(http, Handshake, []),
|
||||
[Headers, <<>>] = websocket_headers(
|
||||
erlang:decode_packet(httph, Rest, []), []),
|
||||
{'Connection', "Upgrade"} = lists:keyfind('Connection', 1, Headers),
|
||||
{'Upgrade', "websocket"} = lists:keyfind('Upgrade', 1, Headers),
|
||||
{"sec-websocket-accept", "s3pPLMBiTxaQ9kYGzzhZRbK+xOo="}
|
||||
= lists:keyfind("sec-websocket-accept", 1, Headers),
|
||||
{"sec-websocket-extensions", "x-webkit-deflate-frame"}
|
||||
= lists:keyfind("sec-websocket-extensions", 1, Headers),
|
||||
|
||||
Mask = 16#11223344,
|
||||
Hello = << 242, 72, 205, 201, 201, 7, 0 >>,
|
||||
|
||||
% send compressed text frame containing the Hello string
|
||||
% as 2 separate fragments
|
||||
ok = gen_tcp:send(Socket, [
|
||||
<< 0:1, 0:3, 1:4, 1:1, 5:7 >>,
|
||||
<< 16#37 >>, << 16#fa >>, << 16#21 >>, << 16#3d >>, << 16#7f >>,
|
||||
<< 16#9f >>, << 16#4d >>, << 16#51 >>, << 16#58 >>]),
|
||||
ok = gen_tcp:send(Socket, [
|
||||
<< 1:1, 0:3, 0:4, 1:1, 5:7 >>,
|
||||
<< 16#37 >>, << 16#fa >>, << 16#21 >>, << 16#3d >>, << 16#7f >>,
|
||||
<< 16#9f >>, << 16#4d >>, << 16#51 >>, << 16#58 >>]),
|
||||
% receive compressed text frame containing the HelloHello string
|
||||
{ok, << 1:1, 1:1, 0:2, 1:4, 0:1, 5:7, 242, 128, 19, 0, 0 >>}
|
||||
ok = gen_tcp:send(Socket, << 0:1, 1:1, 0:2, 1:4, 1:1, 4:7, Mask:32,
|
||||
(websocket_mask(binary:part(Hello, 0, 4), Mask, <<>>))/binary >>),
|
||||
ok = gen_tcp:send(Socket, << 1:1, 1:1, 0:2, 0:4, 1:1, 3:7, Mask:32,
|
||||
(websocket_mask(binary:part(Hello, 4, 3), Mask, <<>>))/binary >>),
|
||||
% receive compressed text frame containing the Hello string
|
||||
{ok, << 1:1, 1:1, 0:2, 1:4, 0:1, 7:7, Hello/binary >>}
|
||||
= gen_tcp:recv(Socket, 0, 6000),
|
||||
|
||||
ok = gen_tcp:send(Socket, << 1:1, 0:3, 8:4, 1:1, 0:7, 0:32 >>), %% close
|
||||
|
|
@ -632,3 +715,21 @@ websocket_headers({ok, {http_header, _I, Key, _R, Value}, Rest}, Acc) ->
|
|||
F = fun(S) when is_atom(S) -> S; (S) -> string:to_lower(S) end,
|
||||
websocket_headers(erlang:decode_packet(httph, Rest, []),
|
||||
[{F(Key), Value}|Acc]).
|
||||
|
||||
websocket_mask(<<>>, _, Unmasked) ->
|
||||
Unmasked;
|
||||
websocket_mask(<< O:32, Rest/bits >>, MaskKey, Acc) ->
|
||||
T = O bxor MaskKey,
|
||||
websocket_mask(Rest, MaskKey, << Acc/binary, T:32 >>);
|
||||
websocket_mask(<< O:24 >>, MaskKey, Acc) ->
|
||||
<< MaskKey2:24, _:8 >> = << MaskKey:32 >>,
|
||||
T = O bxor MaskKey2,
|
||||
<< Acc/binary, T:24 >>;
|
||||
websocket_mask(<< O:16 >>, MaskKey, Acc) ->
|
||||
<< MaskKey2:16, _:16 >> = << MaskKey:32 >>,
|
||||
T = O bxor MaskKey2,
|
||||
<< Acc/binary, T:16 >>;
|
||||
websocket_mask(<< O:8 >>, MaskKey, Acc) ->
|
||||
<< MaskKey2:8, _:24 >> = << MaskKey:32 >>,
|
||||
T = O bxor MaskKey2,
|
||||
<< Acc/binary, T:8 >>.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue