diff options
Diffstat (limited to 'src/cowboy_protocol.erl')
| -rw-r--r-- | src/cowboy_protocol.erl | 113 |
1 files changed, 54 insertions, 59 deletions
diff --git a/src/cowboy_protocol.erl b/src/cowboy_protocol.erl index 9ad8028..0fe6ed2 100644 --- a/src/cowboy_protocol.erl +++ b/src/cowboy_protocol.erl @@ -39,7 +39,7 @@ %% Internal. -export([init/4]). --export([parse_request/1]). +-export([parse_request/2]). -export([handler_loop/3]). -type onrequest_fun() :: fun((Req) -> Req). @@ -66,7 +66,6 @@ max_header_name_length :: integer(), max_header_value_length :: integer(), timeout :: timeout(), - buffer = <<>> :: binary(), host_tokens = undefined :: undefined | cowboy_dispatcher:tokens(), path_tokens = undefined :: undefined | '*' | cowboy_dispatcher:tokens(), hibernate = false :: boolean(), @@ -107,7 +106,7 @@ init(ListenerPid, Socket, Transport, Opts) -> URLDecDefault = {fun cowboy_http:urldecode/2, crash}, URLDec = get_value(urldecode, Opts, URLDecDefault), ok = ranch:accept_ack(ListenerPid), - wait_request(#state{listener=ListenerPid, socket=Socket, + wait_request(<<>>, #state{listener=ListenerPid, socket=Socket, transport=Transport, dispatch=Dispatch, max_empty_lines=MaxEmptyLines, max_keepalive=MaxKeepalive, max_request_line_length=MaxRequestLineLength, @@ -116,144 +115,141 @@ init(ListenerPid, Socket, Transport, Opts) -> timeout=Timeout, onrequest=OnRequest, onresponse=OnResponse, urldecode=URLDec}). --spec wait_request(#state{}) -> ok. -wait_request(State=#state{socket=Socket, transport=Transport, - timeout=T, buffer=Buffer}) -> +-spec wait_request(binary(), #state{}) -> ok. +wait_request(Buffer, State=#state{ + socket=Socket, transport=Transport, timeout=T}) -> case Transport:recv(Socket, 0, T) of - {ok, Data} -> parse_request(State#state{ - buffer= << Buffer/binary, Data/binary >>}); + {ok, Data} -> parse_request(<< Buffer/binary, Data/binary >>, State); {error, _Reason} -> terminate(State) end. %% @private --spec parse_request(#state{}) -> ok. +-spec parse_request(binary(), #state{}) -> ok. %% Empty lines must be using \r\n. -parse_request(State=#state{buffer= << "\n", _/binary >>}) -> +parse_request(<< "\n", _/binary >>, State) -> error_terminate(400, State); %% We limit the length of the Request-line to MaxLength to avoid endlessly %% reading from the socket and eventually crashing. -parse_request(State=#state{buffer=Buffer, max_request_line_length=MaxLength, +parse_request(Buffer, State=#state{max_request_line_length=MaxLength, req_empty_lines=ReqEmpty, max_empty_lines=MaxEmpty}) -> case binary:match(Buffer, <<"\r\n">>) of nomatch when byte_size(Buffer) > MaxLength -> error_terminate(413, State); nomatch -> - wait_request(State); + wait_request(Buffer, State); {0, _} when ReqEmpty =:= MaxEmpty -> error_terminate(400, State); {0, _} -> << _:16, Rest/binary >> = Buffer, - parse_request(State#state{ - buffer=Rest, req_empty_lines=ReqEmpty + 1}); + parse_request(Rest, State#state{req_empty_lines=ReqEmpty + 1}); {Pos, _} -> << RequestLine:Pos/binary, _:16, Rest/binary >> = Buffer, case cowboy_http:request_line(RequestLine) of {Method, AbsPath, Version} -> - request(State#state{buffer=Rest}, Method, AbsPath, Version); + request(Rest, State, Method, AbsPath, Version); {error, _} -> error_terminate(400, State) end end. --spec request(#state{}, binary(), binary(), cowboy_http:version()) -> ok. -request(State, _, _, Version) +-spec request(binary(), #state{}, binary(), binary(), cowboy_http:version()) + -> ok. +request(_, State, _, _, Version) when Version =/= {1, 0}, Version =/= {1, 1} -> error_terminate(505, State); -request(State=#state{socket=Socket, transport=Transport, +request(Buffer, State=#state{socket=Socket, transport=Transport, onresponse=OnResponse, urldecode=URLDec}, Method, <<"*">>, Version) -> Connection = version_to_connection(State, Version), - parse_header(State#state{path_tokens= '*'}, + parse_header(Buffer, State#state{path_tokens= '*'}, cowboy_req:new(Socket, Transport, Connection, Method, Version, <<"*">>, <<>>, OnResponse, URLDec)); -request(State=#state{socket=Socket, transport=Transport, +request(Buffer, State=#state{socket=Socket, transport=Transport, onresponse=OnResponse, urldecode=URLDec={URLDecFun, URLDecArg}}, Method, AbsPath, Version) -> Connection = version_to_connection(State, Version), {PathTokens, Path, Qs} = cowboy_dispatcher:split_path(AbsPath, fun(Bin) -> URLDecFun(Bin, URLDecArg) end), - parse_header(State#state{path_tokens=PathTokens}, + parse_header(Buffer, State#state{path_tokens=PathTokens}, cowboy_req:new(Socket, Transport, Connection, Method, Version, Path, Qs, OnResponse, URLDec)). --spec parse_header(#state{}, cowboy_req:req()) -> ok. -parse_header(State=#state{buffer= << "\r\n", Rest/binary >>}, Req) -> - header_end(State#state{buffer=Rest}, Req); -parse_header(State=#state{buffer=Buffer, - max_header_name_length=MaxLength}, Req) -> +-spec parse_header(binary(), #state{}, cowboy_req:req()) -> ok. +parse_header(<< "\r\n", Rest/binary >>, State, Req) -> + header_end(Rest, State, Req); +parse_header(Buffer, State=#state{max_header_name_length=MaxLength}, Req) -> case binary:match(Buffer, <<":">>) of nomatch when byte_size(Buffer) > MaxLength -> error_terminate(413, State); nomatch -> - wait_header(State, Req, fun parse_header/2); + wait_header(Buffer, State, Req, fun parse_header/3); {Pos, _} -> << Name:Pos/binary, _:8, Rest/binary >> = Buffer, Name2 = cowboy_bstr:to_lower(Name), Rest2 = cowboy_http:whitespace(Rest, fun(D) -> D end), - parse_header_value(State#state{buffer=Rest2}, Req, Name2, <<>>) + parse_header_value(Rest2, State, Req, Name2, <<>>) end. -parse_header_value(State=#state{buffer=Buffer, - max_header_value_length=MaxLength}, Req, Name, SoFar) -> +parse_header_value(Buffer, State=#state{max_header_value_length=MaxLength}, + Req, Name, SoFar) -> case binary:match(Buffer, <<"\r\n">>) of nomatch when byte_size(Buffer) + byte_size(SoFar) > MaxLength -> error_terminate(413, State); nomatch -> - wait_header(State, Req, - fun(S, R) -> parse_header_value(S, R, Name, SoFar) end); + wait_header(Buffer, State, Req, + fun(B, S, R) -> parse_header_value(B, S, R, Name, SoFar) end); {Pos, _} when Pos + 2 =:= byte_size(Buffer) -> - wait_header(State, Req, - fun(S, R) -> parse_header_value(S, R, Name, SoFar) end); + wait_header(Buffer, State, Req, + fun(B, S, R) -> parse_header_value(B, S, R, Name, SoFar) end); {Pos, _} -> << Value:Pos/binary, _:16, Rest/binary >> = Buffer, case binary:at(Buffer, Pos + 2) of C when C =:= $\s; C =:= $\t -> - parse_header_value(State#state{buffer=Rest}, Req, Name, + parse_header_value(Rest, State, Req, Name, << SoFar/binary, Value/binary >>); _ -> - header(State#state{buffer=Rest}, Req, Name, + header(Rest, State, Req, Name, << SoFar/binary, Value/binary >>) end end. --spec wait_header(#state{}, cowboy_req:req(), fun()) -> ok. -wait_header(State=#state{socket=Socket, transport=Transport, - timeout=T, buffer=Buffer}, Req, Fun) -> +-spec wait_header(binary(), #state{}, cowboy_req:req(), fun()) -> ok. +wait_header(Buffer, State=#state{socket=Socket, transport=Transport, + timeout=T}, Req, Fun) -> case Transport:recv(Socket, 0, T) of - {ok, Data} -> Fun(State#state{ - buffer= << Buffer/binary, Data/binary >>}, Req); + {ok, Data} -> Fun(<< Buffer/binary, Data/binary >>, State, Req); {error, timeout} -> error_terminate(408, State); {error, closed} -> terminate(State) end. --spec header(#state{}, cowboy_req:req(), binary(), binary()) -> ok. -header(State=#state{host_tokens=undefined, transport=Transport}, +-spec header(binary(), #state{}, cowboy_req:req(), binary(), binary()) -> ok. +header(Buffer, State=#state{host_tokens=undefined, transport=Transport}, Req, <<"host">>, RawHost) -> RawHost2 = cowboy_bstr:to_lower(RawHost), case catch cowboy_dispatcher:split_host(RawHost2) of {HostTokens, Host, undefined} -> Port = default_port(Transport:name()), - parse_header(State#state{host_tokens=HostTokens}, + parse_header(Buffer, State#state{host_tokens=HostTokens}, cowboy_req:set_host(Host, Port, RawHost, Req)); {HostTokens, Host, Port} -> - parse_header(State#state{host_tokens=HostTokens}, + parse_header(Buffer, State#state{host_tokens=HostTokens}, cowboy_req:set_host(Host, Port, RawHost, Req)); {'EXIT', _Reason} -> error_terminate(400, State) end; %% Ignore Host headers if we already have it. -header(State, Req, <<"host">>, _) -> - parse_header(State, Req); -header(State=#state{req_keepalive=Keepalive, max_keepalive=MaxKeepalive}, - Req, <<"connection">>, Connection) +header(Buffer, State, Req, <<"host">>, _) -> + parse_header(Buffer, State, Req); +header(Buffer, State=#state{req_keepalive=Keepalive, + max_keepalive=MaxKeepalive}, Req, <<"connection">>, Connection) when Keepalive < MaxKeepalive -> - parse_header(State, cowboy_req:set_connection(Connection, Req)); -header(State, Req, Name, Value) -> - parse_header(State, cowboy_req:add_header(Name, Value, Req)). + parse_header(Buffer, State, cowboy_req:set_connection(Connection, Req)); +header(Buffer, State, Req, Name, Value) -> + parse_header(Buffer, State, cowboy_req:add_header(Name, Value, Req)). %% The Host header is required in HTTP/1.1 and optional in HTTP/1.0. -header_end(State=#state{host_tokens=undefined, - buffer=Buffer, transport=Transport}, Req) -> +header_end(Buffer, State=#state{host_tokens=undefined, transport=Transport}, + Req) -> case cowboy_req:version(Req) of {{1, 1}, _} -> error_terminate(400, State); @@ -262,10 +258,10 @@ header_end(State=#state{host_tokens=undefined, onrequest( cowboy_req:set_buffer(Buffer, cowboy_req:set_host(<<>>, Port, <<>>, Req2)), - State#state{buffer= <<>>, host_tokens=[]}) + State) end; -header_end(State=#state{buffer=Buffer}, Req) -> - onrequest(cowboy_req:set_buffer(Buffer, Req), State#state{buffer= <<>>}). +header_end(Buffer, State, Req) -> + onrequest(cowboy_req:set_buffer(Buffer, Req), State). %% Call the global onrequest callback. The callback can send a reply, %% in which case we consider the request handled and move on to the next @@ -443,8 +439,7 @@ next_request(Req, State=#state{req_keepalive=Keepalive}, HandlerRes) -> receive {cowboy_req, resp_sent} -> ok after 0 -> ok end, case {HandlerRes, BodyRes, cowboy_req:get_connection(Req)} of {ok, ok, keepalive} -> - ?MODULE:parse_request(State#state{ - handler=undefined, buffer=Buffer, + ?MODULE:parse_request(Buffer, State#state{handler=undefined, req_empty_lines=0, req_keepalive=Keepalive + 1}); _Closed -> terminate(State) |