From 8b9d9937dc4c2a0f8c849b965efed560fa469904 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= Date: Fri, 28 Apr 2017 11:28:41 +0200 Subject: Add Gun Websocket handlers and protocol support This functionality can be used to implement custom protocols on top of Websocket, but may also be used to decode frame contents on the fly if necessary. The default_protocol option defines what module should be used when no protocol was selected. The protocols option is a list of key/value pairs used to select the handler depending on the protocol that the server accepted. The feature is currently experimental. --- src/gun_ws_handler.erl | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 src/gun_ws_handler.erl (limited to 'src/gun_ws_handler.erl') diff --git a/src/gun_ws_handler.erl b/src/gun_ws_handler.erl new file mode 100644 index 0000000..4356ab5 --- /dev/null +++ b/src/gun_ws_handler.erl @@ -0,0 +1,35 @@ +%% Copyright (c) 2017, Loïc Hoguin +%% +%% Permission to use, copy, modify, and/or distribute this software for any +%% purpose with or without fee is hereby granted, provided that the above +%% copyright notice and this permission notice appear in all copies. +%% +%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES +%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF +%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR +%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES +%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN +%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF +%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + +-module(gun_ws_handler). + +-export([init/3]). +-export([handle/2]). + +-record(state, { + reply_to :: pid(), + frag_buffer = <<>> :: binary() +}). + +init(ReplyTo, _, _) -> + #state{reply_to=ReplyTo}. + +handle({fragment, nofin, _, Payload}, State=#state{frag_buffer=SoFar}) -> + State#state{frag_buffer= << SoFar/binary, Payload/binary >>}; +handle({fragment, fin, Type, Payload}, State=#state{reply_to=ReplyTo, frag_buffer=SoFar}) -> + ReplyTo ! {gun_ws, self(), {Type, << SoFar/binary, Payload/binary >>}}, + State#state{frag_buffer= <<>>}; +handle(Frame, State=#state{reply_to=ReplyTo}) -> + ReplyTo ! {gun_ws, self(), Frame}, + State. -- cgit v1.2.3