diff options
Diffstat (limited to 'lib/inets/src/http_server/httpd_manager.erl')
| -rw-r--r-- | lib/inets/src/http_server/httpd_manager.erl | 569 |
1 files changed, 165 insertions, 404 deletions
diff --git a/lib/inets/src/http_server/httpd_manager.erl b/lib/inets/src/http_server/httpd_manager.erl index 26e1d2d065..e155498bb8 100644 --- a/lib/inets/src/http_server/httpd_manager.erl +++ b/lib/inets/src/http_server/httpd_manager.erl @@ -1,7 +1,7 @@ %% %% %CopyrightBegin% %% -%% Copyright Ericsson AB 2000-2013. All Rights Reserved. +%% Copyright Ericsson AB 2000-2014. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in @@ -25,9 +25,11 @@ -behaviour(gen_server). %% Application internal API --export([start/2, start_link/2, start_link/3, start_link/4, stop/1, reload/2]). --export([new_connection/1, done_connection/1]). +-export([start/2, start_link/2, start_link/3, start_link/4, + stop/1, reload/2]). +-export([new_connection/1]). -export([config_match/2, config_match/3]). +-export([block/2, block/3, unblock/1]). %% gen_server exports -export([init/1, @@ -35,26 +37,19 @@ terminate/2, code_change/3]). - -%% Management exports --export([block/2, block/3, unblock/1]). - -record(state,{socket_type = ip_comm, config_file, config_db = null, - connections, %% Current request handlers + connection_sup, admin_state = unblocked, blocker_ref = undefined, - blocking_tmr = undefined, + blocking_from = undefined, + shutdown_poller = undefined, status = []}). +%%%-------------------------------------------------------------------- +%%% Application internal API +%%%-------------------------------------------------------------------- - -%%TODO: Clean up this module! - - -%% -%% External API -%% %% Deprecated start(ConfigFile, ConfigList) -> Port = proplists:get_value(port,ConfigList,80), @@ -73,7 +68,8 @@ start_link(ConfigFile, ConfigList, AcceptTimeout) -> Name = make_name(Addr, Port), gen_server:start_link({local, Name},?MODULE, - [ConfigFile, ConfigList, AcceptTimeout, Addr, Port],[]). + [ConfigFile, ConfigList, + AcceptTimeout, Addr, Port],[]). start_link(ConfigFile, ConfigList, AcceptTimeout, ListenSocket) -> Port = proplists:get_value(port, ConfigList, 80), @@ -83,81 +79,33 @@ start_link(ConfigFile, ConfigList, AcceptTimeout, ListenSocket) -> gen_server:start_link({local, Name},?MODULE, [ConfigFile, ConfigList, AcceptTimeout, Addr, Port, ListenSocket],[]). - stop(ServerRef) -> call(ServerRef, stop). reload(ServerRef, Conf) -> call(ServerRef, {reload, Conf}). - -%%%---------------------------------------------------------------- - -block(ServerRef, disturbing) -> - call(ServerRef,block); - -block(ServerRef, non_disturbing) -> - do_block(ServerRef, non_disturbing, infinity). +block(ServerRef, Method) -> + block(ServerRef, Method, infinity). block(ServerRef, Method, Timeout) -> - do_block(ServerRef, Method, Timeout). - - -%% The reason for not using call here, is that the manager cannot -%% _wait_ for completion of the requests. It must be able to do -%% do other things at the same time as the blocking goes on. -do_block(ServerRef, Method, infinity) -> - Ref = make_ref(), - cast(ServerRef, {block, Method, infinity, self(), Ref}), - receive - {block_reply, Reply, Ref} -> - Reply - end; -do_block(ServerRef,Method,Timeout) when Timeout > 0 -> - Ref = make_ref(), - cast(ServerRef,{block,Method,Timeout,self(),Ref}), - receive - {block_reply,Reply,Ref} -> - Reply - end. - - -%%%---------------------------------------------------------------- - -%% unblock + call(ServerRef, {block, self(), Method, Timeout}). unblock(ServerRef) -> - call(ServerRef,unblock). - - -%% Internal API -%% - - -%% new_connection + call(ServerRef,{unblock, self()}). new_connection(Manager) -> call(Manager, {new_connection, self()}). -%% done - -done_connection(Manager) -> - cast(Manager, {done_connection, self()}). - - config_match(Port, Pattern) -> config_match(undefined,Port,Pattern). config_match(Addr, Port, Pattern) -> Name = httpd_util:make_name("httpd",Addr,Port), call(whereis(Name), {config_match, Pattern}). - -%% -%% Server call-back functions -%% - -%% init - +%%%-------------------------------------------------------------------- +%%% gen_server callbacks functions +%%%-------------------------------------------------------------------- init([ConfigFile, ConfigList, AcceptTimeout, Addr, Port]) -> process_flag(trap_exit, true), case (catch do_init(ConfigFile, ConfigList, AcceptTimeout, Addr, Port)) of @@ -188,47 +136,35 @@ init([ConfigFile, ConfigList, AcceptTimeout, Addr, Port, ListenInfo]) -> {ok, State} end. -do_init(ConfigFile, ConfigList, AcceptTimeout, Addr, Port) -> - IpFamily = proplists:get_value(ipfamily, ConfigList, inet6fb4), +do_init(ConfigFile, ConfigList, _AcceptTimeout, Addr, Port) -> + Sup = httpd_util:make_name("httpd_connection_sup", Addr, Port), NewConfigFile = proplists:get_value(file, ConfigList, ConfigFile), ConfigDB = do_initial_store(ConfigList), SocketType = httpd_conf:lookup_socket_type(ConfigDB), - case httpd_acceptor_sup:start_acceptor(SocketType, Addr, - Port, IpFamily, ConfigDB, AcceptTimeout) of - {ok, _Pid} -> - Status = [{max_conn, 0}, - {last_heavy_load, never}, - {last_connection, never}], + Status = [{max_conn, 0}, + {last_heavy_load, never}, + {last_connection, never}], State = #state{socket_type = SocketType, config_file = NewConfigFile, config_db = ConfigDB, - connections = [], + connection_sup = Sup, status = Status}, - {ok, State}; - Else -> - Else - end. + {ok, State}. -do_init(ConfigFile, ConfigList, AcceptTimeout, Addr, Port, ListenInfo) -> - IpFamily = proplists:get_value(ipfamily, ConfigList, inet6fb4), +do_init(ConfigFile, ConfigList, _AcceptTimeout, Addr, Port, _ListenInfo) -> + Sup = httpd_util:make_name("httpd_connection_sup", Addr, Port), NewConfigFile = proplists:get_value(file, ConfigList, ConfigFile), ConfigDB = do_initial_store(ConfigList), SocketType = httpd_conf:lookup_socket_type(ConfigDB), - case httpd_acceptor_sup:start_acceptor(SocketType, Addr, - Port, IpFamily, ConfigDB, - AcceptTimeout, ListenInfo) of - {ok, _Pid} -> - Status = [{max_conn,0}, {last_heavy_load,never}, - {last_connection,never}], + Status = [{max_conn,0}, {last_heavy_load,never}, + {last_connection,never}], State = #state{socket_type = SocketType, config_file = NewConfigFile, config_db = ConfigDB, - connections = [], + connection_sup = Sup, status = Status}, - {ok, State}; - Else -> - Else - end. + {ok, State}. + do_initial_store(ConfigList) -> case httpd_conf:store(ConfigList) of @@ -238,10 +174,6 @@ do_initial_store(ConfigList) -> throw({error, Reason}) end. - - -%% handle_call - handle_call(stop, _From, State) -> {stop, normal, ok, State}; @@ -249,8 +181,7 @@ handle_call({config_match, Query}, _From, State) -> Res = ets:match_object(State#state.config_db, Query), {reply, Res, State}; -handle_call({reload, Conf}, _From, State) - when State#state.admin_state =:= blocked -> +handle_call({reload, Conf}, _From, #state{admin_state = blocked} = State) -> case handle_reload(Conf, State) of {stop, Reply,S1} -> {stop, Reply, S1}; @@ -261,13 +192,32 @@ handle_call({reload, Conf}, _From, State) handle_call({reload, _}, _From, State) -> {reply,{error,{invalid_admin_state,State#state.admin_state}},State}; -handle_call(block, _From, State) -> - {Reply,S1} = handle_block(State), - {reply,Reply,S1}; +handle_call({block , Blocker, Mode, Timeout}, From, + #state{admin_state = unblocked, + connection_sup = CSup} = State) -> + Monitor = erlang:monitor(process, Blocker), + case count_children(CSup) of + 0 -> + %% Already in idle usage state => go directly to blocked + {reply, ok, State#state{admin_state = blocked, + blocker_ref = {Blocker, Monitor}, + blocking_from = From}}; + _ -> + handle_block(Mode, Timeout, + State#state{blocker_ref = {Blocker, Monitor}, + blocking_from = From}) + end; +handle_call({block , _, _, _}, _, State) -> + {reply, {error, blocked}, State}; + +handle_call({unblock, Blocker}, _, #state{blocker_ref = {Blocker,_}, + admin_state = blocked} = State) -> + + {reply, ok, + State#state{admin_state = unblocked, blocker_ref = undefined}}; -handle_call(unblock, {From,_Tag}, State) -> - {Reply,S1} = handle_unblock(State,From), - {reply, Reply, S1}; +handle_call({unblock, _}, _, State) -> + {reply, {error, only_blocker_may_unblock}, State}; handle_call({new_connection, Pid}, _From, State) -> {Status, NewState} = handle_new_connection(State, Pid), @@ -284,21 +234,6 @@ handle_call(Request, From, State) -> report_error(State,String), {reply, ok, State}. - -%% handle_cast - -handle_cast({done_connection, Pid}, State) -> - S1 = handle_done_connection(State, Pid), - {noreply, S1}; - -handle_cast({block, disturbing, Timeout, From, Ref}, State) -> - S1 = handle_block(State, Timeout, From, Ref), - {noreply,S1}; - -handle_cast({block, non_disturbing, Timeout, From, Ref}, State) -> - S1 = handle_nd_block(State, Timeout, From, Ref), - {noreply,S1}; - handle_cast(Message, State) -> String = lists:flatten( @@ -309,32 +244,51 @@ handle_cast(Message, State) -> report_error(State, String), {noreply, State}. -%% handle_info - -handle_info({block_timeout, Method}, State) -> - S1 = handle_block_timeout(State,Method), - {noreply, S1}; +handle_info(connections_terminated, #state{admin_state = shutting_down, + blocking_from = From} = State) -> + gen_server:reply(From, ok), + {noreply, State#state{admin_state = blocked, blocking_from = undefined, + blocker_ref = undefined}}; +handle_info(connections_terminated, State) -> + {noreply, State}; -handle_info({'DOWN', Ref, process, _Object, _Info}, State) -> - S1 = - case State#state.blocker_ref of - Ref -> - handle_blocker_exit(State); - _ -> - %% Not our blocker, so ignore - State - end, - {noreply, S1}; +handle_info({block_timeout, non_disturbing}, + #state{admin_state = shutting_down, + blocking_from = From, + blocker_ref = {_, Monitor}} = State) -> + erlang:demonitor(Monitor), + gen_server:reply(From, {error, timeout}), + {noreply, State#state{admin_state = unblocked, blocking_from = undefined, + blocker_ref = undefined}}; +handle_info({block_timeout, disturbing}, + #state{admin_state = shutting_down, + blocking_from = From, + blocker_ref = {_, Monitor}, + connection_sup = Sup} = State) -> + SupPid = whereis(Sup), + shutdown_connections(SupPid), + erlang:demonitor(Monitor), + gen_server:reply(From, ok), + {noreply, State#state{admin_state = blocked, blocker_ref = undefined, + blocking_from = undefined}}; +handle_info({block_timeout, _, _}, State) -> + {noreply, State}; + +handle_info({'DOWN', _, process, Pid, _Info}, + #state{admin_state = Admin, + blocker_ref = {Pid, _}} = State) when + Admin =/= unblocked -> + {noreply, State#state{admin_state = unblocked, + blocking_from = undefined, + blocker_ref = undefined}}; +handle_info({'DOWN', _, process, _, _}, State) -> + {noreply, State}; handle_info({'EXIT', _, normal}, State) -> {noreply, State}; -handle_info({'EXIT', _, blocked}, S) -> - {noreply, S}; - -handle_info({'EXIT', Pid, Reason}, State) -> - S1 = check_connections(State, Pid, Reason), - {noreply, S1}; +handle_info({'EXIT', _, shutdown}, State) -> + {stop, shutdown, State}; handle_info(Info, State) -> String = @@ -346,217 +300,66 @@ handle_info(Info, State) -> report_error(State, String), {noreply, State}. - -%% terminate - terminate(_, #state{config_db = Db}) -> httpd_conf:remove_all(Db), ok. - -%% code_change({down,ToVsn}, State, Extra) -%% - code_change({down,_ToVsn}, State, _Extra) -> {ok,State}; -%% code_change(FromVsn, State, Extra) -%% code_change(_FromVsn, State, _Extra) -> {ok,State}. - - -%% ------------------------------------------------------------------------- -%% check_connection -%% -%% -%% -%% - -check_connections(#state{connections = []} = State, _Pid, _Reason) -> - State; -check_connections(#state{connections = Connections} = State, Pid, _Reason) -> - State#state{connections = lists:delete(Pid, Connections)}. - - -%% ------------------------------------------------------------------------- -%% handle_[new | done]_connection -%% -%% -%% -%% - -handle_new_connection(State, Handler) -> +%%%-------------------------------------------------------------------- +%%% Internal functions +%%%-------------------------------------------------------------------- +handle_new_connection(#state{admin_state = AdminState} = State, Handler) -> UsageState = get_ustate(State), - AdminState = get_astate(State), handle_new_connection(UsageState, AdminState, State, Handler). -handle_new_connection(busy, unblocked, State, _Handler) -> - Status = update_heavy_load_status(State#state.status), - {{reject, busy}, - State#state{status = Status}}; - -handle_new_connection(_UsageState, unblocked, State, Handler) -> - Connections = State#state.connections, - Status = update_connection_status(State#state.status, - length(Connections)+1), - link(Handler), - {{ok, accept}, - State#state{connections = [Handler|Connections], status = Status}}; - -handle_new_connection(_UsageState, _AdminState, State, _Handler) -> - {{reject, blocked}, - State}. - -handle_done_connection(#state{admin_state = shutting_down, - connections = Connections} = State, Handler) -> - unlink(Handler), - case lists:delete(Handler, Connections) of - [] -> % Ok, block complete - demonitor_blocker(State#state.blocker_ref), - {Tmr,From,Ref} = State#state.blocking_tmr, - stop_block_tmr(Tmr), - From ! {block_reply,ok,Ref}, - State#state{admin_state = blocked, connections = [], - blocker_ref = undefined}; - Connections1 -> - State#state{connections = Connections1} - end; - -handle_done_connection(#state{connections = Connections} = State, Handler) -> - State#state{connections = lists:delete(Handler, Connections)}. - - -%% ------------------------------------------------------------------------- -%% handle_block -%% -%% -%% -%% -handle_block(#state{admin_state = AdminState} = S) -> - handle_block(S, AdminState). - -handle_block(S,unblocked) -> - %% Kill all connections - [kill_handler(Pid) || Pid <- S#state.connections], - {ok,S#state{connections = [], admin_state = blocked}}; -handle_block(S,blocked) -> - {ok,S}; -handle_block(S,shutting_down) -> - {{error,shutting_down},S}. - - -kill_handler(Pid) -> - exit(Pid, blocked). - -handle_block(S,Timeout,From,Ref) when Timeout >= 0 -> - do_block(S,Timeout,From,Ref); - -handle_block(S,Timeout,From,Ref) -> - Reply = {error,{invalid_block_request,Timeout}}, - From ! {block_reply,Reply,Ref}, - S. - -do_block(S,Timeout,From,Ref) -> - case S#state.connections of - [] -> - %% Already in idle usage state => go directly to blocked - From ! {block_reply,ok,Ref}, - S#state{admin_state = blocked}; +handle_new_connection(_UsageState, unblocked, + #state{config_db = Db, connection_sup = CSup} = + State, _) -> + Max = httpd_util:lookup(Db, max_clients), + case count_children(CSup) of + Count when Count =< Max -> + {{ok, accept}, State}; _ -> - %% Active or Busy usage state => go to shutting_down - %% Make sure we get to know if blocker dies... - MonitorRef = monitor_blocker(From), - Tmr = {start_block_tmr(Timeout,disturbing),From,Ref}, - S#state{admin_state = shutting_down, - blocker_ref = MonitorRef, blocking_tmr = Tmr} - end. - -handle_nd_block(S,infinity,From,Ref) -> - do_nd_block(S,infinity,From,Ref); - -handle_nd_block(S,Timeout,From,Ref) when Timeout >= 0 -> - do_nd_block(S,Timeout,From,Ref); - -handle_nd_block(S,Timeout,From,Ref) -> - Reply = {error,{invalid_block_request,Timeout}}, - From ! {block_reply,Reply,Ref}, - S. - -do_nd_block(S,Timeout,From,Ref) -> - case S#state.connections of - [] -> - %% Already in idle usage state => go directly to blocked - From ! {block_reply,ok,Ref}, - S#state{admin_state = blocked}; - _ -> - %% Active or Busy usage state => go to shutting_down - %% Make sure we get to know if blocker dies... - MonitorRef = monitor_blocker(From), - Tmr = {start_block_tmr(Timeout,non_disturbing),From,Ref}, - S#state{admin_state = shutting_down, - blocker_ref = MonitorRef, blocking_tmr = Tmr} - end. + {{reject, busy}, State} + end; -handle_block_timeout(S,Method) -> - %% Time to take this to the road... - demonitor_blocker(S#state.blocker_ref), - handle_block_timeout1(S,Method,S#state.blocking_tmr). - -handle_block_timeout1(S,non_disturbing,{_,From,Ref}) -> - From ! {block_reply,{error,timeout},Ref}, - S#state{admin_state = unblocked, - blocker_ref = undefined, blocking_tmr = undefined}; - -handle_block_timeout1(S,disturbing,{_,From,Ref}) -> - [exit(Pid,blocked) || Pid <- S#state.connections], - - From ! {block_reply,ok,Ref}, - S#state{admin_state = blocked, connections = [], - blocker_ref = undefined, blocking_tmr = undefined}; - -handle_block_timeout1(S,Method,{_,From,Ref}) -> - From ! {block_reply,{error,{unknown_block_method,Method}},Ref}, - S#state{admin_state = blocked, connections = [], - blocker_ref = undefined, blocking_tmr = undefined}; - -handle_block_timeout1(S, _Method, _TmrInfo) -> - S#state{admin_state = unblocked, - blocker_ref = undefined, blocking_tmr = undefined}. - -handle_unblock(S, FromA) -> - handle_unblock(S, FromA, S#state.admin_state). - -handle_unblock(S, _FromA, unblocked) -> - {ok,S}; -handle_unblock(S, FromA, _AdminState) -> - case S#state.blocking_tmr of - {Tmr,FromB,Ref} -> - %% Another process is trying to unblock - %% Inform the blocker - stop_block_tmr(Tmr), - FromB ! {block_reply, {error,{unblocked,FromA}},Ref}; - _ -> - ok - end, - {ok,S#state{admin_state = unblocked, blocking_tmr = undefined}}. - -%% The blocker died so we give up on the block. -handle_blocker_exit(S) -> - {Tmr,_From,_Ref} = S#state.blocking_tmr, - stop_block_tmr(Tmr), - S#state{admin_state = unblocked, - blocker_ref = undefined, blocking_tmr = undefined}. +handle_new_connection(_UsageState, _AdminState, State, _Handler) -> + {{reject, blocked}, State}. + +handle_block(disturbing, infinity, + #state{connection_sup = CSup, + blocking_from = From, + blocker_ref = {_, Monitor}} = State) -> + SupPid = whereis(CSup), + shutdown_connections(SupPid), + erlang:demonitor(Monitor), + gen_server:reply(From, ok), + {noreply, State#state{admin_state = blocked, blocker_ref = undefined, + blocking_from = undefined}}; +handle_block(disturbing, Timeout, #state{connection_sup = CSup} = State) -> + Manager = self(), + spawn_link(fun() -> wait_for_shutdown(CSup, Manager) end), + erlang:send_after(Timeout, self(), {block_timeout, disturbing}), + {noreply, State#state{admin_state = shutting_down}}; + +handle_block(non_disturbing, infinity, + #state{connection_sup = CSup} = State) -> + Manager = self(), + spawn_link(fun() -> wait_for_shutdown(CSup, Manager) end), + {noreply, State#state{admin_state = shutting_down}}; + +handle_block(non_disturbing, Timeout, + #state{connection_sup = CSup} = State) -> + Manager = self(), + spawn_link(fun() -> wait_for_shutdown(CSup, Manager) end), + erlang:send_after(Timeout, self(), {block_timeout, non_disturbing}), + {noreply, State#state{admin_state = shutting_down}}. - - -%% ------------------------------------------------------------------------- -%% handle_reload -%% -%% -%% -%% handle_reload(undefined, #state{config_file = undefined} = State) -> {continue, {error, undefined_config_file}, State}; handle_reload(undefined, #state{config_file = ConfigFile} = State) -> @@ -632,7 +435,7 @@ check_constant_values(Db, Config) -> %% Otherwise -> active %% get_ustate(State) -> - get_ustate(length(State#state.connections),State). + get_ustate(count_children(State#state.connection_sup),State). get_ustate(0,_State) -> idle; @@ -645,60 +448,6 @@ get_ustate(ConnectionCnt,State) -> active end. - -get_astate(S) -> S#state.admin_state. - - -%% Timer handling functions -start_block_tmr(infinity,_) -> - undefined; -start_block_tmr(T,M) -> - erlang:send_after(T,self(),{block_timeout,M}). - -stop_block_tmr(undefined) -> - ok; -stop_block_tmr(Ref) -> - erlang:cancel_timer(Ref). - - -%% Monitor blocker functions -monitor_blocker(Pid) when is_pid(Pid) -> - case (catch erlang:monitor(process,Pid)) of - {'EXIT', _Reason} -> - undefined; - MonitorRef -> - MonitorRef - end; -monitor_blocker(_) -> - undefined. - -demonitor_blocker(undefined) -> - ok; -demonitor_blocker(Ref) -> - (catch erlang:demonitor(Ref)). - - -%% Some status utility functions - -update_heavy_load_status(Status) -> - update_status_with_time(Status,last_heavy_load). - -update_connection_status(Status,ConnCount) -> - S1 = case lists:keysearch(max_conn,1,Status) of - {value, {max_conn, C1}} when ConnCount > C1 -> - lists:keyreplace(max_conn,1,Status,{max_conn,ConnCount}); - {value, {max_conn, _C2}} -> - Status; - false -> - [{max_conn, ConnCount} | Status] - end, - update_status_with_time(S1,last_connection). - -update_status_with_time(Status,Key) -> - lists:keyreplace(Key,1,Status,{Key,universal_time()}). - -universal_time() -> calendar:universal_time(). - make_name(Addr,Port) -> httpd_util:make_name("httpd",Addr,Port). @@ -709,19 +458,31 @@ report_error(State,String) -> mod_log:report_error(Cdb,String), mod_disk_log:report_error(Cdb,String). -%% call(ServerRef, Request) -> try gen_server:call(ServerRef, Request, infinity) catch exit:_ -> - {error, closed} + {error, closed} end. -cast(ServerRef, Message) -> - try gen_server:cast(ServerRef, Message) - catch - exit:_ -> - {error, closed} - end. +count_children(Sup) -> + Children = supervisor:count_children(whereis(Sup)), + proplists:get_value(workers, Children). + +shutdown_connections(Sup) -> + Children = [Child || {_,Child,_,_} <- supervisor:which_children(Sup)], + lists:foreach(fun(Pid) -> exit(Pid, kill) end, + Children). +wait_for_shutdown(CSup, Manager) -> + case count_children(CSup) of + 0 -> + Manager ! connections_terminated; + _ -> + receive + after 500 -> + ok + end, + wait_for_shutdown(CSup, Manager) + end. |