%% 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(proxy_header_SUITE).
-compile(export_all).
-compile(nowarn_export_all).
-import(ct_helper, [config/2]).
-import(ct_helper, [doc/1]).
-import(cowboy_test, [raw_send/2]).
-import(cowboy_test, [raw_recv_head/1]).
-import(cowboy_test, [raw_recv/3]).
%% ct.
all() ->
[
{group, http},
{group, https},
{group, h2},
{group, h2c},
{group, h2c_upgrade}
].
groups() ->
Tests = ct_helper:all(?MODULE),
[{h2c_upgrade, [parallel], Tests}|cowboy_test:common_groups(Tests)].
init_per_group(Name=http, Config) ->
cowboy_test:init_http(Name, #{
env => #{dispatch => init_dispatch()},
proxy_header => true
}, Config);
init_per_group(Name=https, Config) ->
cowboy_test:init_https(Name, #{
env => #{dispatch => init_dispatch()},
proxy_header => true
}, Config);
init_per_group(Name=h2, Config) ->
cowboy_test:init_http2(Name, #{
env => #{dispatch => init_dispatch()},
proxy_header => true
}, Config);
init_per_group(Name, Config) ->
Config1 = cowboy_test:init_http(Name, #{
env => #{dispatch => init_dispatch()},
proxy_header => true
}, Config),
lists:keyreplace(protocol, 1, Config1, {protocol, http2}).
end_per_group(Name, _) ->
cowboy:stop_listener(Name).
%% Routes.
init_dispatch() ->
cowboy_router:compile([{"[...]", [
{"/direct/:key/[...]", echo_h, []}
]}]).
%% Tests.
v1_proxy_header(Config) ->
doc("Confirm we can read the proxy header at the start of the connection."),
ProxyInfo = #{
version => 1,
command => proxy,
transport_family => ipv4,
transport_protocol => stream,
src_address => {127, 0, 0, 1},
src_port => 444,
dest_address => {192, 168, 0, 1},
dest_port => 443
},
do_proxy_header(Config, ProxyInfo).
v2_proxy_header(Config) ->
doc("Confirm we can read the proxy header at the start of the connection."),
ProxyInfo = #{
version => 2,
command => proxy,
transport_family => ipv4,
transport_protocol => stream,
src_address => {127, 0, 0, 1},
src_port => 444,
dest_address => {192, 168, 0, 1},
dest_port => 443
},
do_proxy_header(Config, ProxyInfo).
v2_local_header(Config) ->
doc("Confirm we can read the proxy header at the start of the connection."),
ProxyInfo = #{
version => 2,
command => local
},
do_proxy_header(Config, ProxyInfo).
do_proxy_header(Config, ProxyInfo) ->
case config(ref, Config) of
http -> do_proxy_header_http(Config, ProxyInfo);
https -> do_proxy_header_https(Config, ProxyInfo);
h2 -> do_proxy_header_h2(Config, ProxyInfo);
h2c -> do_proxy_header_h2c(Config, ProxyInfo);
h2c_upgrade -> do_proxy_header_h2c_upgrade(Config, ProxyInfo)
end.
do_proxy_header_http(Config, ProxyInfo) ->
{ok, Socket} = gen_tcp:connect("localhost", config(port, Config),
[binary, {active, false}, {packet, raw}]),
ok = gen_tcp:send(Socket, ranch_proxy_header:header(ProxyInfo)),
do_proxy_header_http_common({raw_client, Socket, gen_tcp}, ProxyInfo).
do_proxy_header_https(Config, ProxyInfo) ->
{ok, Socket0} = gen_tcp:connect("localhost", config(port, Config),
[binary, {active, false}, {packet, raw}]),
ok = gen_tcp:send(Socket0, ranch_proxy_header:header(ProxyInfo)),
TlsOpts = ct_helper:get_certs_from_ets(),
{ok, Socket} = ssl:connect(Socket0, TlsOpts, 1000),
do_proxy_header_http_common({raw_client, Socket, ssl}, ProxyInfo).
do_proxy_header_http_common(Client, ProxyInfo) ->
ok = raw_send(Client,
"GET /direct/proxy_header HTTP/1.1\r\n"
"Host: localhost\r\n"
"\r\n"),
{_, 200, _, Rest0} = cow_http:parse_status_line(raw_recv_head(Client)),
{Headers, Body0} = cow_http:parse_headers(Rest0),
{_, LenBin} = lists:keyfind(<<"content-length">>, 1, Headers),
Len = binary_to_integer(LenBin),
Body = if
byte_size(Body0) =:= Len -> Body0;
true ->
{ok, Body1} = raw_recv(Client, Len - byte_size(Body0), 5000),
<<Body0/bits, Body1/bits>>
end,
ProxyInfo = do_parse_term(Body),
ok.
do_proxy_header_h2(Config, ProxyInfo) ->
{ok, Socket0} = gen_tcp:connect("localhost", config(port, Config),
[binary, {active, false}, {packet, raw}]),
ok = gen_tcp:send(Socket0, ranch_proxy_header:header(ProxyInfo)),
TlsOpts = ct_helper:get_certs_from_ets(),
{ok, Socket} = ssl:connect(Socket0,
[{alpn_advertised_protocols, [<<"h2">>]}|TlsOpts], 1000),
do_proxy_header_h2_common({raw_client, Socket, ssl}, ProxyInfo).
do_proxy_header_h2c(Config, ProxyInfo) ->
{ok, Socket} = gen_tcp:connect("localhost", config(port, Config),
[binary, {active, false}, {packet, raw}]),
ok = gen_tcp:send(Socket, ranch_proxy_header:header(ProxyInfo)),
do_proxy_header_h2_common({raw_client, Socket, gen_tcp}, ProxyInfo).
do_proxy_header_h2c_upgrade(Config, ProxyInfo) ->
{ok, Socket} = gen_tcp:connect("localhost", config(port, Config),
[binary, {active, false}, {packet, raw}]),
ok = gen_tcp:send(Socket, ranch_proxy_header:header(ProxyInfo)),
Client = {raw_client, Socket, gen_tcp},
ok = raw_send(Client, [
"GET /direct/proxy_header HTTP/1.1\r\n"
"Host: localhost\r\n"
"Connection: Upgrade, HTTP2-Settings\r\n"
"Upgrade: h2c\r\n"
"HTTP2-Settings: ", base64:encode(iolist_to_binary(cow_http2:settings_payload(#{}))), "\r\n"
"\r\n"]),
ok = do_recv_101(Client),
%% Receive the server preface.
{ok, <<PrefaceLen:24>>} = raw_recv(Client, 3, 1000),
{ok, <<4:8, 0:40, _:PrefaceLen/binary>>} = raw_recv(Client, 6 + PrefaceLen, 1000),
do_proxy_header_h2_response_common(Client, ProxyInfo),
ok.
do_proxy_header_h2_common(Client, ProxyInfo) ->
%% Send a valid preface.
ok = raw_send(Client, ["PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n", cow_http2:settings(#{})]),
%% Receive the server preface.
{ok, <<PrefaceLen:24>>} = raw_recv(Client, 3, 1000),
{ok, <<4:8, 0:40, _:PrefaceLen/binary>>} = raw_recv(Client, 6 + PrefaceLen, 1000),
%% Send the SETTINGS ack.
ok = raw_send(Client, cow_http2:settings_ack()),
%% Receive the SETTINGS ack.
{ok, <<0:24, 4:8, 1:8, 0:32>>} = raw_recv(Client, 9, 1000),
%% Send a GET request.
{HeadersBlock, _} = cow_hpack:encode([
{<<":method">>, <<"GET">>},
{<<":scheme">>, <<"http">>},
{<<":authority">>, <<"localhost">>}, %% @todo Correct port number.
{<<":path">>, <<"/direct/proxy_header">>}
]),
Len = iolist_size(HeadersBlock),
ok = raw_send(Client, [
<<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
]),
do_proxy_header_h2_response_common(Client, ProxyInfo).
do_proxy_header_h2_response_common(Client, ProxyInfo) ->
%% Receive a response with the proxy header data.
{ok, <<SkipLen:24, 1:8, _:8, 1:32>>} = raw_recv(Client, 9, 1000),
{ok, _} = raw_recv(Client, SkipLen, 1000),
{ok, <<BodyLen:24, 0:8, 1:8, 1:32>>} = raw_recv(Client, 9, 1000),
{ok, Body} = raw_recv(Client, BodyLen, 1000),
ProxyInfo = do_parse_term(Body),
ok.
do_parse_term(Body) ->
{ok, Tokens, _} = erl_scan:string(binary_to_list(Body) ++ "."),
{ok, Exprs} = erl_parse:parse_exprs(Tokens),
{value, Term, _} = erl_eval:exprs(Exprs, erl_eval:new_bindings()),
Term.
%% Match directly for now.
do_recv_101(Client) ->
{ok, <<
"HTTP/1.1 101 Switching Protocols\r\n"
"connection: Upgrade\r\n"
"upgrade: h2c\r\n"
"\r\n"
>>} = raw_recv(Client, 71, 1000),
ok.
