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authorLuca Favatella <[email protected]>2018-03-16 18:00:00 +0000
committerLuca Favatella <[email protected]>2018-03-23 17:02:53 +0000
commit9a19dc099198585bd4f019116663d5b8be506ce0 (patch)
tree742ef416e52af1c37f92814ccf2735f62a1674b8
parentcef626165bc62edcc78c3be0c2cb107ae961b805 (diff)
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inets: Teach httpc to honour `Connection: close` from server
From https://tools.ietf.org/html/rfc7230#section-6.6 > A client that receives a "close" connection option MUST cease sending requests on that connection and close the connection after reading the response message containing the "close"; if additional pipelined requests had been sent on the connection, the client SHOULD NOT assume that they will be processed by the server. Notes on tests: * The new tests are added only in group sim_http and not sim_https because the same test approach appears to be not valid because when processing the first response the server already sent data (> 0) for the TLS/SSL handshake; * The order of tests is relevant as it appears some test cases leave reusable sessions behind.
-rw-r--r--lib/inets/src/http_client/httpc_handler.erl32
-rw-r--r--lib/inets/test/httpc_SUITE.erl95
2 files changed, 117 insertions, 10 deletions
diff --git a/lib/inets/src/http_client/httpc_handler.erl b/lib/inets/src/http_client/httpc_handler.erl
index 0ca8155054..ca29523f84 100644
--- a/lib/inets/src/http_client/httpc_handler.erl
+++ b/lib/inets/src/http_client/httpc_handler.erl
@@ -1043,15 +1043,29 @@ handle_response(#state{status = new} = State) ->
?hcrd("handle response - status = new", []),
handle_response(try_to_enable_pipeline_or_keep_alive(State));
-handle_response(#state{request = Request,
- status = Status,
- session = Session,
- status_line = StatusLine,
- headers = Headers,
- body = Body,
- options = Options,
- profile_name = ProfileName} = State)
- when Status =/= new ->
+handle_response(#state{status = Status0} = State0) when Status0 =/= new ->
+ Status =
+ case Status0 of
+ close -> close;
+ _ ->
+ case State0#state.headers of
+ undefined -> Status0;
+ _ ->
+ case httpc_response:is_server_closing(
+ State0#state.headers) of
+ true -> close;
+ false -> Status0
+ end
+ end
+ end,
+ State = State0#state{status = Status},
+ #state{request = Request,
+ session = Session,
+ status_line = StatusLine,
+ headers = Headers,
+ body = Body,
+ options = Options,
+ profile_name = ProfileName} = State,
handle_cookies(Headers, Request, Options, ProfileName),
case httpc_response:result({StatusLine, Headers, Body}, Request) of
%% 100-continue
diff --git a/lib/inets/test/httpc_SUITE.erl b/lib/inets/test/httpc_SUITE.erl
index c8eaa4b3df..287db81bad 100644
--- a/lib/inets/test/httpc_SUITE.erl
+++ b/lib/inets/test/httpc_SUITE.erl
@@ -67,7 +67,7 @@ groups() ->
%% process_leak_on_keepalive is depending on stream_fun_server_close
%% and it shall be the last test case in the suite otherwise cookie
%% will fail.
- {sim_http, [], only_simulated() ++ [process_leak_on_keepalive]},
+ {sim_http, [], only_simulated() ++ server_closing_connection() ++ [process_leak_on_keepalive]},
{http_internal, [], real_requests_esi()},
{http_unix_socket, [], simulated_unix_socket()},
{https, [], real_requests()},
@@ -154,6 +154,12 @@ only_simulated() ->
stream_fun_server_close
].
+server_closing_connection() ->
+ [
+ server_closing_connection_on_first_response,
+ server_closing_connection_on_second_response
+ ].
+
misc() ->
[
server_does_not_exist,
@@ -252,6 +258,24 @@ end_per_testcase(pipeline, _Config) ->
inets:stop(httpc, pipeline);
end_per_testcase(persistent_connection, _Config) ->
inets:stop(httpc, persistent);
+end_per_testcase(Case, Config)
+ when Case == server_closing_connection_on_first_response;
+ Case == server_closing_connection_on_second_response ->
+ %% Test case uses at most one session. Ensure no leftover
+ %% sessions left behind.
+ {_, Status} = proplists:lookup(tc_status, Config),
+ ShallCleanup = case Status of
+ ok -> true;
+ {failed, _} -> true;
+ {skipped, _} -> false
+ end,
+ if ShallCleanup ->
+ httpc:request(url(group_name(Config), "/just_close.html", Config)),
+ ok;
+ true ->
+ ct:pal("Not cleaning up because test case status was ~p", [Status]),
+ ok
+ end;
end_per_testcase(_Case, _Config) ->
ok.
@@ -1275,6 +1299,53 @@ stream_fun_server_close(Config) when is_list(Config) ->
end.
%%--------------------------------------------------------------------
+server_closing_connection_on_first_response() ->
+ [{doc, "Client receives \"Connection: close\" on first response."
+ "A client that receives a \"close\" connection option MUST cease sending"
+ "requests on that connection and close the connection after reading"
+ "the response message containing the \"close\""}].
+server_closing_connection_on_first_response(Config) when is_list(Config) ->
+ ReqSrvSendOctFun =
+ fun(V, U, S) ->
+ {ok, {{V, S, _}, Headers0, []}} =
+ httpc:request(get, {U, []}, [{version, V}], []),
+ {_, SendOctStr} =
+ proplists:lookup("x-socket-stat-send-oct", Headers0),
+ list_to_integer(SendOctStr)
+ end,
+ V = "HTTP/1.1",
+ Url0 = url(group_name(Config), "/http_1_1_send_oct.html", Config),
+ Url1 = url(group_name(Config), "/http_1_1_send_oct_and_connection_close.html", Config),
+ %% Test case assumes at most one reusable past session.
+ _ = ReqSrvSendOctFun(V, Url1, 204),
+ 0 = ReqSrvSendOctFun(V, Url0, 204),
+ ok.
+
+%%--------------------------------------------------------------------
+server_closing_connection_on_second_response() ->
+ [{doc, "Client receives \"Connection: close\" on second response."
+ "A client that receives a \"close\" connection option MUST cease sending"
+ "requests on that connection and close the connection after reading"
+ "the response message containing the \"close\""}].
+server_closing_connection_on_second_response(Config) when is_list(Config) ->
+ ReqSrvSendOctFun =
+ fun(V, U, S) ->
+ {ok, {{V, S, _}, Headers0, []}} =
+ httpc:request(get, {U, []}, [{version, V}], []),
+ {_, SendOctStr} =
+ proplists:lookup("x-socket-stat-send-oct", Headers0),
+ list_to_integer(SendOctStr)
+ end,
+ V = "HTTP/1.1",
+ Url0 = url(group_name(Config), "/http_1_1_send_oct.html", Config),
+ Url1 = url(group_name(Config), "/http_1_1_send_oct_and_connection_close.html", Config),
+ %% Test case assumes no reusable past sessions.
+ SendOct0 = 0 = ReqSrvSendOctFun(V, Url0, 204),
+ case ReqSrvSendOctFun(V, Url1, 204) of SendOct1 when SendOct1 > SendOct0 -> ok end,
+ 0 = ReqSrvSendOctFun(V, Url0, 204),
+ ok.
+
+%%--------------------------------------------------------------------
slow_connection() ->
[{doc, "Test that a request on a slow keep-alive connection won't crash the httpc_manager"}].
slow_connection(Config) when is_list(Config) ->
@@ -2232,10 +2303,32 @@ handle_uri("GET","/v1/kv/foo",_,_,_,_) ->
"Content-Length: 24\r\n" ++
"Content-Type: application/json\r\n\r\n" ++
"[{\"Value\": \"aGVsbG8=\"}]\n";
+handle_uri(_,"/http_1_1_send_oct.html",_,_,Socket,_) ->
+ "HTTP/1.1 204 No Content\r\n" ++
+ "X-Socket-Stat-Send-Oct: " ++ integer_to_list(get_stat(Socket, send_oct)) ++ "\r\n" ++
+ "\r\n";
+handle_uri(_,"/http_1_1_send_oct_and_connection_close.html",_,_,Socket,_) ->
+ "HTTP/1.1 204 No Content\r\n" ++
+ "X-Socket-Stat-Send-Oct: " ++ integer_to_list(get_stat(Socket, send_oct)) ++ "\r\n" ++
+ "Connection: close\r\n" ++
+ "\r\n";
handle_uri(_,_,_,_,_,DefaultResponse) ->
DefaultResponse.
+get_stat(S, Opt) ->
+ case getstat(S, [Opt]) of
+ {ok, [{Opt, V}]} when is_integer(V) ->
+ V;
+ {error, _} = E ->
+ E
+ end.
+
+getstat(#sslsocket{} = S, Opts) ->
+ ssl:getstat(S, Opts);
+getstat(S, Opts) ->
+ inet:getstat(S, Opts).
+
url_start(#sslsocket{}) ->
{ok,Host} = inet:gethostname(),
?TLS_URL_START ++ Host ++ ":";