From 32db544782f2528ed0916eecb200f75924dcc407 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Lo=C3=AFc=20Hoguin?= Date: Thu, 27 Apr 2017 15:23:57 +0200 Subject: Add content handlers and built-in SSE support Content handlers are a chain of modules implementing callbacks that receive the body of responses and may modify it (for example for decompressing the content) or act upon it (like sending a message to the owner process. The gun_sse content handler module can be used to translate text/event-stream events on the fly and deliver them to the owner process as a {gun_sse...} message. This feature is currently not documented and is only tested against a public server. It requires an up to date Cowlib. --- src/gun_data.erl | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 src/gun_data.erl (limited to 'src/gun_data.erl') diff --git a/src/gun_data.erl b/src/gun_data.erl new file mode 100644 index 0000000..e70c25e --- /dev/null +++ b/src/gun_data.erl @@ -0,0 +1,33 @@ +%% 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_data). +-behavior(gun_content_handler). + +-export([init/5]). +-export([handle/3]). + +-record(state, { + reply_to :: pid(), + stream_ref :: reference() +}). + +-spec init(pid(), reference(), _, _, _) -> {ok, #state{}}. +init(ReplyTo, StreamRef, _, _, _) -> + {ok, #state{reply_to=ReplyTo, stream_ref=StreamRef}}. + +-spec handle(fin | nofin, binary(), State) -> {done, State} when State::#state{}. +handle(IsFin, Data, State=#state{reply_to=ReplyTo, stream_ref=StreamRef}) -> + ReplyTo ! {gun_data, self(), StreamRef, IsFin, Data}, + {done, State}. -- cgit v1.2.3