-module(handshake_protocol).
-behaviour(ranch_protocol).
-export([start_link/3]).
-export([init/3]).
start_link(Ref, Transport, Opts) ->
Pid = spawn_link(?MODULE, init, [Ref, Transport, Opts]),
{ok, Pid}.
init(Ref, Transport, Opts) ->
SniHost = case ranch:handshake(Ref) of
%% Due to a bug in ssl (https://bugs.erlang.org/browse/ERL-951,
%% fixed in OTP 22.0.3) the value for sni may be {sni, Hostname}
%% instead of Hostname.
{continue, #{sni := {sni, Hostname}}} ->
Hostname;
{continue, #{sni := Hostname}} ->
Hostname
end,
SniHostOpts = maps:get(SniHost, Opts),
{ok, Socket} = ranch:handshake_continue(Ref, SniHostOpts),
loop(Socket, Transport).
loop(Socket, Transport) ->
case Transport:recv(Socket, 0, 5000) of
{ok, Data} ->
Transport:send(Socket, Data),
loop(Socket, Transport);
_ ->
ok = Transport:close(Socket)
end.
