%% Copyright (c) 2017-2019, 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(gun_SUITE).
-compile(export_all).
-compile(nowarn_export_all).
-import(ct_helper, [doc/1]).
-import(ct_helper, [name/0]).
-import(gun_test, [init_origin/2]).
-import(gun_test, [init_origin/3]).
-import(gun_test, [receive_from/1]).
-import(gun_test, [receive_all_from/2]).
-import(gun_test_event_h, [receive_event/1]).
-import(gun_test_event_h, [receive_event/2]).
suite() ->
[{timetrap, 30000}].
all() ->
[{group, gun}].
groups() ->
[{gun, [parallel], ct_helper:all(?MODULE)}].
%% Tests.
atom_header_name(_) ->
doc("Header names may be given as atom."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http),
{ok, Pid} = gun:open("localhost", OriginPort),
{ok, http} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
_ = gun:get(Pid, "/", [
{'User-Agent', "Gun/atom-headers"}
]),
Data = receive_from(OriginPid),
Lines = binary:split(Data, <<"\r\n">>, [global]),
[<<"user-agent: Gun/atom-headers">>] = [L || <<"user-agent: ", _/bits>> = L <- Lines],
gun:close(Pid).
atom_hostname(_) ->
doc("Hostnames may be given as atom."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http),
{ok, Pid} = gun:open('localhost', OriginPort),
{ok, http} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
_ = gun:get(Pid, "/"),
Data = receive_from(OriginPid),
Lines = binary:split(Data, <<"\r\n">>, [global]),
[<<"host: localhost:", _/bits>>] = [L || <<"host: ", _/bits>> = L <- Lines],
gun:close(Pid).
connect_timeout(_) ->
doc("Ensure an integer value for connect_timeout is accepted."),
do_timeout(connect_timeout, 1000).
connect_timeout_infinity(_) ->
doc("Ensure infinity for connect_timeout is accepted."),
do_timeout(connect_timeout, infinity).
domain_lookup_timeout(_) ->
doc("Ensure an integer value for domain_lookup_timeout is accepted."),
do_timeout(domain_lookup_timeout, 1000).
domain_lookup_timeout_infinity(_) ->
doc("Ensure infinity for domain_lookup_timeout is accepted."),
do_timeout(domain_lookup_timeout, infinity).
do_timeout(Opt, Timeout) ->
{ok, ConnPid} = gun:open("localhost", 12345, #{
Opt => Timeout,
event_handler => {gun_test_event_h, self()},
retry => 0
}),
%% The connection will not succeed. We will however receive
%% an init event from the connection process that indicates
%% that the timeout value was accepted, since the timeout
%% checks occur earlier.
{_, init, _} = receive_event(ConnPid),
gun:close(ConnPid).
ignore_empty_data_http(_) ->
doc("When gun:data/4 is called with nofin and empty data, it must be ignored."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http),
{ok, Pid} = gun:open("localhost", OriginPort),
{ok, http} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
Ref = gun:put(Pid, "/", []),
gun:data(Pid, Ref, nofin, "hello "),
gun:data(Pid, Ref, nofin, ["", <<>>]),
gun:data(Pid, Ref, fin, "world!"),
Data = receive_all_from(OriginPid, 500),
Lines = binary:split(Data, <<"\r\n">>, [global]),
Zero = [Z || <<"0">> = Z <- Lines],
1 = length(Zero),
gun:close(Pid).
ignore_empty_data_http2(_) ->
doc("When gun:data/4 is called with nofin and empty data, it must be ignored."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http2),
{ok, Pid} = gun:open("localhost", OriginPort, #{protocols => [http2]}),
{ok, http2} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
Ref = gun:put(Pid, "/", []),
gun:data(Pid, Ref, nofin, "hello "),
gun:data(Pid, Ref, nofin, ["", <<>>]),
gun:data(Pid, Ref, fin, "world!"),
Data = receive_all_from(OriginPid, 500),
<<
%% HEADERS frame.
Len1:24, 1, _:40, _:Len1/unit:8,
%% First DATA frame.
6:24, 0, _:7, 0:1, _:32, "hello ",
%% Second and final DATA frame.
6:24, 0, _:7, 1:1, _:32, "world!"
>> = Data,
gun:close(Pid).
info(_) ->
doc("Get info from the Gun connection."),
{ok, ListenSocket} = gen_tcp:listen(0, [binary, {active, false}]),
{ok, {_, Port}} = inet:sockname(ListenSocket),
{ok, Pid} = gun:open("localhost", Port),
{ok, _} = gen_tcp:accept(ListenSocket, 5000),
#{sock_ip := _, sock_port := _} = gun:info(Pid),
gun:close(Pid).
keepalive_infinity(_) ->
doc("Ensure infinity for keepalive is accepted by all protocols."),
{ok, ConnPid} = gun:open("localhost", 12345, #{
event_handler => {gun_test_event_h, self()},
http_opts => #{keepalive => infinity},
http2_opts => #{keepalive => infinity},
retry => 0
}),
%% The connection will not succeed. We will however receive
%% an init event from the connection process that indicates
%% that the timeout value was accepted, since the timeout
%% checks occur earlier.
{_, init, _} = receive_event(ConnPid),
gun:close(ConnPid).
killed_streams_http(_) ->
doc("Ensure completed responses with a connection: close are not considered killed streams."),
{ok, _, OriginPort} = init_origin(tcp, http,
fun (_, ClientSocket, ClientTransport) ->
{ok, _} = ClientTransport:recv(ClientSocket, 0, 1000),
ClientTransport:send(ClientSocket,
"HTTP/1.1 200 OK\r\n"
"connection: close\r\n"
"content-length: 12\r\n"
"\r\n"
"hello world!"
)
end),
{ok, ConnPid} = gun:open("localhost", OriginPort),
{ok, http} = gun:await_up(ConnPid),
StreamRef = gun:get(ConnPid, "/"),
{response, nofin, 200, _} = gun:await(ConnPid, StreamRef),
{ok, <<"hello world!">>} = gun:await_body(ConnPid, StreamRef),
receive
{gun_down, ConnPid, http, normal, KilledStreams} ->
[] = KilledStreams,
gun:close(ConnPid)
end.
list_header_name(_) ->
doc("Header names may be given as list."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http),
{ok, Pid} = gun:open("localhost", OriginPort),
{ok, http} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
_ = gun:get(Pid, "/", [
{"User-Agent", "Gun/list-headers"}
]),
Data = receive_from(OriginPid),
Lines = binary:split(Data, <<"\r\n">>, [global]),
[<<"user-agent: Gun/list-headers">>] = [L || <<"user-agent: ", _/bits>> = L <- Lines],
gun:close(Pid).
map_headers(_) ->
doc("Header names may be given as a map."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http),
{ok, Pid} = gun:open("localhost", OriginPort),
{ok, http} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
_ = gun:get(Pid, "/", #{
<<"USER-agent">> => "Gun/map-headers"
}),
Data = receive_from(OriginPid),
Lines = binary:split(Data, <<"\r\n">>, [global]),
[<<"user-agent: Gun/map-headers">>] = [L || <<"user-agent: ", _/bits>> = L <- Lines],
gun:close(Pid).
postpone_request_while_not_connected(_) ->
doc("Ensure Gun doesn't raise error when requesting in retries"),
%% Try connecting to a server that isn't up yet.
{ok, ConnPid} = gun:open("localhost", 23456, #{
event_handler => {gun_test_event_h, self()},
retry => 5,
retry_timeout => 1000
}),
_ = gun:get(ConnPid, "/postponed"),
%% Wait for the connection attempt. to fail.
{_, connect_end, #{error := _}} = receive_event(ConnPid, connect_end),
%% Start the server so that next retry will result in the client connecting successfully.
{ok, ListenSocket} = gen_tcp:listen(23456, [binary, {active, false}, {reuseaddr, true}]),
{ok, ClientSocket} = gen_tcp:accept(ListenSocket, 5000),
%% The client should now be up.
{ok, http} = gun:await_up(ConnPid),
%% The server receives the postponed request.
{ok, <<"GET /postponed HTTP/1.1\r\n", _/bits>>} = gen_tcp:recv(ClientSocket, 0, 5000),
gun:close(ConnPid).
reply_to_http(_) ->
doc("The reply_to option allows using a separate process for requests."),
do_reply_to(http).
reply_to_http2(_) ->
doc("The reply_to option allows using a separate process for requests."),
do_reply_to(http2).
do_reply_to(Protocol) ->
{ok, OriginPid, OriginPort} = init_origin(tcp, Protocol,
fun(_, ClientSocket, ClientTransport) ->
{ok, _} = ClientTransport:recv(ClientSocket, 0, infinity),
ResponseData = case Protocol of
http ->
"HTTP/1.1 200 OK\r\n"
"Content-length: 12\r\n"
"\r\n"
"Hello world!";
http2 ->
%% Send a HEADERS frame with PRIORITY back.
{HeadersBlock, _} = cow_hpack:encode([
{<<":status">>, <<"200">>}
]),
Len = iolist_size(HeadersBlock),
[
<<Len:24, 1:8,
0:2, %% Undefined.
0:1, %% PRIORITY.
0:1, %% Undefined.
0:1, %% PADDED.
1:1, %% END_HEADERS.
0:1, %% Undefined.
1:1, %% END_STREAM.
0:1, 1:31>>,
HeadersBlock
]
end,
ok = ClientTransport:send(ClientSocket, ResponseData),
timer:sleep(1000)
end),
{ok, Pid} = gun:open("localhost", OriginPort, #{protocols => [Protocol]}),
{ok, Protocol} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
Self = self(),
ReplyTo = spawn(fun() ->
receive Ref when is_reference(Ref) ->
Response = gun:await(Pid, Ref, infinity),
Self ! Response
end
end),
Ref = gun:get(Pid, "/", [], #{reply_to => ReplyTo}),
ReplyTo ! Ref,
receive
Msg ->
{response, _, _, _} = Msg,
gun:close(Pid)
end.
retry_0(_) ->
doc("Ensure Gun gives up immediately with retry=0."),
{ok, ConnPid} = gun:open("localhost", 12345, #{
event_handler => {gun_test_event_h, self()},
retry => 0,
retry_timeout => 500
}),
{_, init, _} = receive_event(ConnPid),
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _}} = receive_event(ConnPid),
{_, terminate, _} = receive_event(ConnPid),
ok.
retry_0_disconnect(_) ->
doc("Ensure Gun gives up immediately with retry=0 after a successful connection."),
{ok, ListenSocket} = gen_tcp:listen(0, [binary, {active, false}]),
{ok, {_, Port}} = inet:sockname(ListenSocket),
{ok, ConnPid} = gun:open("localhost", Port, #{
event_handler => {gun_test_event_h, self()},
retry => 0,
retry_timeout => 500
}),
{_, init, _} = receive_event(ConnPid),
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
%% We accept the connection and then close it to trigger a disconnect.
{ok, ClientSocket} = gen_tcp:accept(ListenSocket, 5000),
gen_tcp:close(ClientSocket),
%% Connection was successful.
{_, connect_end, ConnectEndEvent} = receive_event(ConnPid),
false = maps:is_key(error, ConnectEndEvent),
%% When the connection is closed we terminate immediately.
{_, disconnect, _} = receive_event(ConnPid),
{_, terminate, _} = receive_event(ConnPid),
ok.
retry_1(_) ->
doc("Ensure Gun gives up with retry=1."),
{ok, ConnPid} = gun:open("localhost", 12345, #{
event_handler => {gun_test_event_h, self()},
retry => 1,
retry_timeout => 500
}),
{_, init, _} = receive_event(ConnPid),
%% Initial attempt.
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _}} = receive_event(ConnPid),
%% Retry.
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _}} = receive_event(ConnPid),
{_, terminate, _} = receive_event(ConnPid),
ok.
retry_1_disconnect(_) ->
doc("Ensure Gun doesn't give up with retry=1 after a successful connection "
"and attempts to reconnect immediately, ignoring retry_timeout."),
{ok, ListenSocket} = gen_tcp:listen(0, [binary, {active, false}]),
{ok, {_, Port}} = inet:sockname(ListenSocket),
{ok, ConnPid} = gun:open("localhost", Port, #{
event_handler => {gun_test_event_h, self()},
retry => 1,
retry_timeout => 30000
}),
{_, init, _} = receive_event(ConnPid),
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
%% We accept the connection and then close it to trigger a disconnect.
{ok, ClientSocket} = gen_tcp:accept(ListenSocket, 5000),
gen_tcp:close(ClientSocket),
%% Connection was successful.
{_, connect_end, ConnectEndEvent} = receive_event(ConnPid),
false = maps:is_key(error, ConnectEndEvent),
%% We confirm that Gun reconnects before the retry timeout,
%% as it is ignored on the first reconnection.
{ok, _} = gen_tcp:accept(ListenSocket, 5000),
gun:close(ConnPid).
retry_fun(_) ->
doc("Ensure the retry_fun is used when provided."),
{ok, ConnPid} = gun:open("localhost", 12345, #{
event_handler => {gun_test_event_h, self()},
retry => 5,
retry_fun => fun(_, _) -> #{retries => 0, timeout => 0} end,
retry_timeout => 60000
}),
{_, init, _} = receive_event(ConnPid),
%% Initial attempt.
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _}} = receive_event(ConnPid),
%% When retry is not disabled (retry!=0) we necessarily
%% have at least one retry attempt using the fun.
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _}} = receive_event(ConnPid),
{_, terminate, _} = receive_event(ConnPid),
ok.
retry_timeout(_) ->
doc("Ensure the retry_timeout value is enforced. The first retry is immediate "
"and therefore does not use the timeout."),
{ok, ConnPid} = gun:open("localhost", 12345, #{
event_handler => {gun_test_event_h, self()},
retry => 2,
retry_timeout => 1000
}),
{_, init, _} = receive_event(ConnPid),
%% Initial attempt.
{_, domain_lookup_start, _} = receive_event(ConnPid),
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _, ts := TS1}} = receive_event(ConnPid),
%% First retry is immediate.
{_, domain_lookup_start, #{ts := TS2}} = receive_event(ConnPid),
true = (TS2 - TS1) < 1000,
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _, ts := TS3}} = receive_event(ConnPid),
%% Second retry occurs after the retry_timeout.
{_, domain_lookup_start, #{ts := TS4}} = receive_event(ConnPid),
true = (TS4 - TS3) >= 1000,
{_, domain_lookup_end, _} = receive_event(ConnPid),
{_, connect_start, _} = receive_event(ConnPid),
{_, connect_end, #{error := _}} = receive_event(ConnPid),
{_, terminate, _} = receive_event(ConnPid),
ok.
set_owner(_) ->
doc("The owner of the connection can be changed."),
Self = self(),
spawn(fun() ->
{ok, ConnPid} = gun:open("localhost", 12345),
gun:set_owner(ConnPid, Self),
Self ! {conn, ConnPid}
end),
ConnPid = receive {conn, C} -> C end,
#{owner := Self} = gun:info(ConnPid),
gun:close(ConnPid).
shutdown_reason(_) ->
doc("The last connection failure must be propagated."),
%% We set retry=1 so that we can monitor before the process terminates.
{ok, ConnPid} = gun:open("localhost", 12345, #{
retry => 1,
retry_timeout => 500
}),
Ref = monitor(process, ConnPid),
receive
{'DOWN', Ref, process, ConnPid, Reason} ->
{shutdown, econnrefused} = Reason,
gun:close(ConnPid)
end.
stream_info_http(_) ->
doc("Ensure the function gun:stream_info/2 works as expected for HTTP/1.1."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http,
fun(_, ClientSocket, ClientTransport) ->
%% Wait for the cancel signal.
receive cancel -> ok end,
%% Then terminate the stream.
ClientTransport:send(ClientSocket,
"HTTP/1.1 200 OK\r\n"
"content-length: 0\r\n"
"\r\n"
),
receive disconnect -> ok end
end),
{ok, Pid} = gun:open("localhost", OriginPort, #{
event_handler => {gun_test_event_h, self()}
}),
{ok, http} = gun:await_up(Pid),
{ok, undefined} = gun:stream_info(Pid, make_ref()),
StreamRef = gun:get(Pid, "/"),
Self = self(),
{ok, #{
ref := StreamRef,
reply_to := Self,
state := running
}} = gun:stream_info(Pid, StreamRef),
gun:cancel(Pid, StreamRef),
OriginPid ! cancel,
{ok, #{
ref := StreamRef,
reply_to := Self,
state := stopping
}} = gun:stream_info(Pid, StreamRef),
%% Wait for the stream to be canceled.
receive_event(Pid, cancel),
fun F() ->
case gun:stream_info(Pid, StreamRef) of
{ok, undefined} -> ok;
{ok, #{state := stopping}} -> F()
end
end,
%% Wait for the connection to terminate.
OriginPid ! disconnect,
receive_event(Pid, disconnect),
{error, not_connected} = gun:stream_info(Pid, StreamRef),
gun:close(Pid).
stream_info_http2(_) ->
doc("Ensure the function gun:stream_info/2 works as expected for HTTP/2."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http2,
fun(_, _, _) -> receive disconnect -> ok end end),
{ok, Pid} = gun:open("localhost", OriginPort, #{
event_handler => {gun_test_event_h, self()},
protocols => [http2]
}),
{ok, http2} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
{ok, undefined} = gun:stream_info(Pid, make_ref()),
StreamRef = gun:get(Pid, "/"),
Self = self(),
{ok, #{
ref := StreamRef,
reply_to := Self,
state := running
}} = gun:stream_info(Pid, StreamRef),
gun:cancel(Pid, StreamRef),
%% Wait for the connection to terminate.
OriginPid ! disconnect,
receive_event(Pid, disconnect),
{error, not_connected} = gun:stream_info(Pid, StreamRef),
gun:close(Pid).
supervise_false(_) ->
doc("The supervise option allows starting without a supervisor."),
{ok, _, OriginPort} = init_origin(tcp, http),
{ok, Pid} = gun:open("localhost", OriginPort, #{supervise => false}),
{ok, http} = gun:await_up(Pid),
[] = [P || {_, P, _, _} <- supervisor:which_children(gun_sup), P =:= Pid],
ok.
tls_handshake_timeout(_) ->
doc("Ensure an integer value for tls_handshake_timeout is accepted."),
do_timeout(tls_handshake_timeout, 1000).
tls_handshake_timeout_infinity(_) ->
doc("Ensure infinity for tls_handshake_timeout is accepted."),
do_timeout(tls_handshake_timeout, infinity).
transform_header_name(_) ->
doc("The transform_header_name option allows changing the case of header names."),
{ok, ListenSocket} = gen_tcp:listen(0, [binary, {active, false}]),
{ok, {_, Port}} = inet:sockname(ListenSocket),
{ok, Pid} = gun:open("localhost", Port, #{
protocols => [http],
http_opts => #{
transform_header_name => fun(<<"host">>) -> <<"HOST">>; (N) -> N end
}
}),
{ok, ClientSocket} = gen_tcp:accept(ListenSocket, 5000),
{ok, http} = gun:await_up(Pid),
_ = gun:get(Pid, "/"),
{ok, Data} = gen_tcp:recv(ClientSocket, 0, 5000),
%% We do some very crude parsing of the response headers
%% to check that the header name was properly transformed.
Lines = binary:split(Data, <<"\r\n">>, [global]),
HostLines = [L || <<"HOST: ", _/bits>> = L <- Lines],
1 = length(HostLines),
gun:close(Pid).
unix_socket_connect(_) ->
case os:type() of
{win32, _} ->
doc("Unix Domain Sockets are not available on Windows.");
_ ->
do_unix_socket_connect()
end.
do_unix_socket_connect() ->
doc("Ensure we can send data via a unix domain socket."),
DataDir = "/tmp/gun",
SocketPath = filename:join(DataDir, "gun.sock"),
ok = filelib:ensure_dir(SocketPath),
_ = file:delete(SocketPath),
TCPOpts = [
{ifaddr, {local, SocketPath}},
binary, {nodelay, true}, {active, false},
{packet, raw}, {reuseaddr, true}
],
{ok, LSock} = gen_tcp:listen(0, TCPOpts),
Tester = self(),
Acceptor = fun() ->
{ok, S} = gen_tcp:accept(LSock),
{ok, R} = gen_tcp:recv(S, 0),
Tester ! {recv, R},
ok = gen_tcp:close(S),
ok = gen_tcp:close(LSock)
end,
spawn(Acceptor),
{ok, Pid} = gun:open_unix(SocketPath, #{}),
_ = gun:get(Pid, "/", [{<<"host">>, <<"localhost">>}]),
receive
{recv, _} ->
gun:close(Pid)
end.
uppercase_header_name(_) ->
doc("Header names may be given with uppercase characters."),
{ok, OriginPid, OriginPort} = init_origin(tcp, http),
{ok, Pid} = gun:open("localhost", OriginPort),
{ok, http} = gun:await_up(Pid),
handshake_completed = receive_from(OriginPid),
_ = gun:get(Pid, "/", [
{<<"USER-agent">>, "Gun/uppercase-headers"}
]),
Data = receive_from(OriginPid),
Lines = binary:split(Data, <<"\r\n">>, [global]),
[<<"user-agent: Gun/uppercase-headers">>] = [L || <<"user-agent: ", _/bits>> = L <- Lines],
gun:close(Pid).
