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%% Copyright (c) 2018, Loïc Hoguin <[email protected]>
%%
%% 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(http_SUITE).
-compile(export_all).
-compile(nowarn_export_all).

-import(ct_helper, [config/2]).
-import(ct_helper, [doc/1]).
-import(ct_helper, [get_remote_pid_tcp/1]).
-import(ct_helper, [name/0]).
-import(cowboy_test, [gun_open/1]).
-import(cowboy_test, [raw_open/1]).
-import(cowboy_test, [raw_send/2]).
-import(cowboy_test, [raw_recv_head/1]).

all() -> [{group, clear}].

groups() -> [{clear, [parallel], ct_helper:all(?MODULE)}].

init_routes(_) -> [
	{"localhost", [
		{"/", hello_h, []},
		{"/echo/:key", echo_h, []},
		{"/set_options/:key", set_options_h, []}
	]}
].

http10_keepalive_false(Config) ->
	doc("Confirm the option {http10_keepalive, false} disables keep-alive "
		"completely for HTTP/1.0 connections."),
	{ok, _} = cowboy:start_clear(name(), [{port, 0}], #{
		env => #{dispatch => cowboy_router:compile(init_routes(Config))},
		http10_keepalive => false
	}),
	Port = ranch:get_port(name()),
	Keepalive = "GET / HTTP/1.0\r\nhost: localhost\r\nConnection: keep-alive\r\n\r\n",
	Client = raw_open([{type, tcp}, {port, Port}, {opts, []}|Config]),
	ok = raw_send(Client, Keepalive),
	_ = case catch raw_recv_head(Client) of
		{'EXIT', _} -> error(closed);
		Data ->
			%% Cowboy always advertises itself as HTTP/1.1.
			{'HTTP/1.1', 200, _, Rest} = cow_http:parse_status_line(Data),
			{Headers, _} = cow_http:parse_headers(Rest),
			{_, <<"close">>} = lists:keyfind(<<"connection">>, 1, Headers)
	end,
	ok = raw_send(Client, Keepalive),
	case catch raw_recv_head(Client) of
		{'EXIT', _} -> closed;
		_ -> error(not_closed)
	end.

idle_timeout_infinity(Config) ->
	doc("Ensure the idle_timeout option accepts the infinity value."),
	{ok, _} = cowboy:start_clear(name(), [{port, 0}], #{
		env => #{dispatch => cowboy_router:compile(init_routes(Config))},
		request_timeout => 500,
		idle_timeout => infinity
	}),
	Port = ranch:get_port(name()),
	ConnPid = gun_open([{type, tcp}, {protocol, http}, {port, Port}|Config]),
	_ = gun:post(ConnPid, "/echo/read_body",
		[{<<"content-type">>, <<"text/plain">>}]),
	#{socket := Socket} = gun:info(ConnPid),
	Pid = get_remote_pid_tcp(Socket),
	Ref = erlang:monitor(process, Pid),
	receive
		{'DOWN', Ref, process, Pid, Reason} ->
			error(Reason)
	after 1000 ->
		ok
	end.

request_timeout_infinity(Config) ->
	doc("Ensure the request_timeout option accepts the infinity value."),
	{ok, _} = cowboy:start_clear(name(), [{port, 0}], #{
		env => #{dispatch => cowboy_router:compile(init_routes(Config))},
		idle_timeout => infinity
	}),
	Port = ranch:get_port(name()),
	ConnPid = gun_open([{type, tcp}, {protocol, http}, {port, Port}|Config]),
	#{socket := Socket} = gun:info(ConnPid),
	Pid = get_remote_pid_tcp(Socket),
	Ref = erlang:monitor(process, Pid),
	receive
		{'DOWN', Ref, process, Pid, Reason} ->
			error(Reason)
	after 1000 ->
		ok
	end.

set_options_idle_timeout(Config) ->
	doc("Confirm that the idle_timeout option can be dynamically "
		"set to change how long Cowboy will wait before it closes the connection."),
	%% We start with a long timeout and then cut it short.
	{ok, _} = cowboy:start_clear(name(), [{port, 0}], #{
		env => #{dispatch => cowboy_router:compile(init_routes(Config))},
		idle_timeout => 60000
	}),
	Port = ranch:get_port(name()),
	ConnPid = gun_open([{type, tcp}, {protocol, http}, {port, Port}|Config]),
	_ = gun:post(ConnPid, "/set_options/idle_timeout_short",
		[{<<"content-type">>, <<"text/plain">>}]),
	#{socket := Socket} = gun:info(ConnPid),
	Pid = get_remote_pid_tcp(Socket),
	Ref = erlang:monitor(process, Pid),
	receive
		{'DOWN', Ref, process, Pid, _} ->
			ok
	after 2000 ->
		error(timeout)
	end.

set_options_idle_timeout_only_applies_to_current_request(Config) ->
	doc("Confirm that changes to the idle_timeout option only apply to the current stream."),
	%% We start with a long timeout and then cut it short.
	{ok, _} = cowboy:start_clear(name(), [{port, 0}], #{
		env => #{dispatch => cowboy_router:compile(init_routes(Config))},
		idle_timeout => 500
	}),
	Port = ranch:get_port(name()),
	ConnPid = gun_open([{type, tcp}, {protocol, http}, {port, Port}|Config]),
	StreamRef = gun:post(ConnPid, "/set_options/idle_timeout_long",
		[{<<"content-type">>, <<"text/plain">>}]),
	#{socket := Socket} = gun:info(ConnPid),
	Pid = get_remote_pid_tcp(Socket),
	Ref = erlang:monitor(process, Pid),
	receive
		{'DOWN', Ref, process, Pid, Reason} ->
			error(Reason)
	after 2000 ->
		ok
	end,
	%% Finish the first request and start a second one to confirm
	%% the idle_timeout option is back to normal.
	gun:data(ConnPid, StreamRef, fin, <<"Hello!">>),
	{response, nofin, 200, _} = gun:await(ConnPid, StreamRef),
	{ok, <<"Hello!">>} = gun:await_body(ConnPid, StreamRef),
	_ = gun:post(ConnPid, "/echo/read_body",
		[{<<"content-type">>, <<"text/plain">>}]),
	receive
		{'DOWN', Ref, process, Pid, _} ->
			ok
	after 2000 ->
		error(timeout)
	end.

switch_protocol_flush(Config) ->
	doc("Confirm that switch_protocol does not flush unrelated messages."),
	ProtoOpts = #{
		env => #{dispatch => cowboy_router:compile(init_routes(Config))},
		stream_handlers => [switch_protocol_flush_h]
	},
	{ok, _} = cowboy:start_clear(switch_protocol_flush, [{port, 0}], ProtoOpts),
	Port = ranch:get_port(switch_protocol_flush),
	Self = self(),
	ConnPid = gun_open([{port, Port}, {type, tcp}, {protocol, http}|Config]),
	_ = gun:get(ConnPid, "/", [
		{<<"x-test-pid">>, pid_to_list(Self)}
	]),
	receive
		{Self, Events} ->
			switch_protocol_flush_h:validate(Events)
	end.