98 lines
2.9 KiB
Erlang
98 lines
2.9 KiB
Erlang
%% Copyright (c) 2019-2023, Loïc Hoguin <essen@ninenines.eu>
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%%
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%% Permission to use, copy, modify, and/or distribute this software for any
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%% purpose with or without fee is hereby granted, provided that the above
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%% copyright notice and this permission notice appear in all copies.
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%%
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%% THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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%% WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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%% MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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%% ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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%% WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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%% ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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%% OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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-module(gun_raw).
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-export([check_options/1]).
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-export([name/0]).
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-export([opts_name/0]).
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-export([has_keepalive/0]).
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-export([init/4]).
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-export([handle/5]).
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-export([update_flow/4]).
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-export([closing/4]).
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-export([close/4]).
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-export([data/7]).
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-export([down/1]).
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-record(raw_state, {
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ref :: undefined | gun:stream_ref(),
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reply_to :: pid(),
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socket :: inet:socket() | ssl:sslsocket(),
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transport :: module(),
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flow :: integer() | infinity
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}).
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check_options(Opts) ->
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do_check_options(maps:to_list(Opts)).
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do_check_options([]) ->
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ok;
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do_check_options([{flow, Flow}|Opts]) when is_integer(Flow); Flow == infinity ->
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do_check_options(Opts);
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do_check_options([Opt|_]) ->
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{error, {options, {raw, Opt}}}.
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name() -> raw.
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opts_name() -> raw_opts.
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has_keepalive() -> false.
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init(ReplyTo, Socket, Transport, Opts) ->
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StreamRef = maps:get(stream_ref, Opts, undefined),
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InitialFlow = maps:get(flow, Opts, infinity),
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{ok, connected_data_only, #raw_state{ref=StreamRef, reply_to=ReplyTo,
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socket=Socket, transport=Transport, flow=InitialFlow}}.
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handle(Data, State=#raw_state{ref=StreamRef, reply_to=ReplyTo, flow=Flow0},
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CookieStore, _, EvHandlerState) ->
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%% When we take over the entire connection there is no stream reference.
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ReplyTo ! {gun_data, self(), StreamRef, nofin, Data},
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Flow = case Flow0 of
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infinity -> infinity;
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_ -> Flow0 - 1
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end,
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{[
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{state, State#raw_state{flow=Flow}},
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{active, Flow > 0}
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], CookieStore, EvHandlerState}.
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update_flow(State=#raw_state{flow=Flow0}, _ReplyTo, _StreamRef, Inc) ->
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Flow = case Flow0 of
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infinity -> infinity;
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_ -> Flow0 + Inc
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end,
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[
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{state, State#raw_state{flow=Flow}},
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{active, Flow > 0}
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].
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%% We can always close immediately.
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closing(_, _, _, EvHandlerState) ->
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{close, EvHandlerState}.
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close(_, _, _, EvHandlerState) ->
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EvHandlerState.
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%% @todo Initiate closing on IsFin=fin.
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data(#raw_state{ref=StreamRef, socket=Socket, transport=Transport}, StreamRef,
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_ReplyTo, _IsFin, Data, _EvHandler, EvHandlerState) ->
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case Transport:send(Socket, Data) of
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ok -> {[], EvHandlerState};
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Error={error, _} -> {Error, EvHandlerState}
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end.
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%% raw has no concept of streams.
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down(_) ->
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[].
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