63 lines
2.4 KiB
Erlang
63 lines
2.4 KiB
Erlang
%% Copyright (c) 2016-2024, 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(cowboy_clear).
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-behavior(ranch_protocol).
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-export([start_link/3]).
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-export([start_link/4]).
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-export([connection_process/4]).
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%% Ranch 1.
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-spec start_link(ranch:ref(), inet:socket(), module(), cowboy:opts()) -> {ok, pid()}.
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start_link(Ref, _Socket, Transport, Opts) ->
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start_link(Ref, Transport, Opts).
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%% Ranch 2.
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-spec start_link(ranch:ref(), module(), cowboy:opts()) -> {ok, pid()}.
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start_link(Ref, Transport, Opts) ->
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Pid = proc_lib:spawn_link(?MODULE, connection_process,
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[self(), Ref, Transport, Opts]),
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{ok, Pid}.
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-spec connection_process(pid(), ranch:ref(), module(), cowboy:opts()) -> ok.
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connection_process(Parent, Ref, Transport, Opts) ->
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ProxyInfo = get_proxy_info(Ref, Opts),
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{ok, Socket} = ranch:handshake(Ref),
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%% Use cowboy_http2 directly only when 'http' is missing.
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%% Otherwise switch to cowboy_http2 from cowboy_http.
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%%
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%% @todo Extend this option to cowboy_tls and allow disabling
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%% the switch to cowboy_http2 in cowboy_http. Also document it.
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Protocol = case maps:get(protocols, Opts, [http2, http]) of
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[http2] -> cowboy_http2;
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[_|_] -> cowboy_http
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end,
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init(Parent, Ref, Socket, Transport, ProxyInfo, Opts, Protocol).
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init(Parent, Ref, Socket, Transport, ProxyInfo, Opts, Protocol) ->
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_ = case maps:get(connection_type, Opts, supervisor) of
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worker -> ok;
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supervisor -> process_flag(trap_exit, true)
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end,
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Protocol:init(Parent, Ref, Socket, Transport, ProxyInfo, Opts).
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get_proxy_info(Ref, #{proxy_header := true}) ->
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case ranch:recv_proxy_header(Ref, 1000) of
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{ok, ProxyInfo} -> ProxyInfo;
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{error, closed} -> exit({shutdown, closed})
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end;
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get_proxy_info(_, _) ->
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undefined.
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