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25 changes: 24 additions & 1 deletion src/hackney_http_connect.erl
Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@
sockname/1]).

-define(TIMEOUT, infinity).
-define(MAX_RESPONSE_HEADER_SIZE, 8192).

-type http_socket() :: {atom(), inet:socket()}.
-export_type([http_socket/0]).
Expand Down Expand Up @@ -186,13 +187,35 @@ do_handshake(Socket, Host, Port, Options) ->
end.

check_response(Socket) ->
case gen_tcp:recv(Socket, 0, ?TIMEOUT) of
case gather_response(Socket, <<>>) of
{ok, Data} ->
check_status(Data);
Error ->
Error
end.

gather_response(Socket, Buffer) ->
ReadResult = gen_tcp:recv(Socket, 0, ?TIMEOUT),
case gather_lines(Buffer, ReadResult) of
{match, NBuffer} ->
{ok, NBuffer};
{nomatch, NBuffer} ->
gather_response(Socket, NBuffer);
Error ->
Error
end.

gather_lines(Buffer, {ok, Data}) when (size(Buffer) + size(Data)) > ?MAX_RESPONSE_HEADER_SIZE ->
{error, response_to_big};
gather_lines(Buffer, {ok, Data}) ->
NBuffer = <<Buffer/binary, Data/binary >>,
case binary:match(NBuffer, <<"\r\n\r\n">>) of
nomatch -> {nomatch, NBuffer};
_Match -> {match, NBuffer}
end;
gather_lines(_, Error) ->
Error.

check_status(<< "HTTP/1.1 200", _/bits >>) ->
ok;
check_status(<< "HTTP/1.1 201", _/bits >>) ->
Expand Down