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%% @author Bob Ippolito <bob@mochimedia.com>
%% @copyright 2007 Mochi Media, Inc.
%% @doc MochiWeb socket server.
-module(mochiweb_socket_server).
-author('bob@mochimedia.com').
-behaviour(gen_server).
-include("internal.hrl").
-export([start/1, stop/1]).
-export([init/1, handle_call/3, handle_cast/2, terminate/2, code_change/3,
handle_info/2]).
-export([get/2]).
-record(mochiweb_socket_server,
{port,
loop,
name=undefined,
%% NOTE: This is currently ignored.
max=2048,
ip=any,
listen=null,
nodelay=false,
backlog=128,
active_sockets=0,
acceptor_pool_size=16,
ssl=false,
ssl_opts=[{ssl_imp, new}],
acceptor_pool=sets:new()}).
start(State=#mochiweb_socket_server{}) ->
start_server(State);
start(Options) ->
start(parse_options(Options)).
get(Name, Property) ->
gen_server:call(Name, {get, Property}).
stop(Name) when is_atom(Name) ->
gen_server:cast(Name, stop);
stop(Pid) when is_pid(Pid) ->
gen_server:cast(Pid, stop);
stop({local, Name}) ->
stop(Name);
stop({global, Name}) ->
stop(Name);
stop(Options) ->
State = parse_options(Options),
stop(State#mochiweb_socket_server.name).
%% Internal API
parse_options(Options) ->
parse_options(Options, #mochiweb_socket_server{}).
parse_options([], State) ->
State;
parse_options([{name, L} | Rest], State) when is_list(L) ->
Name = {local, list_to_atom(L)},
parse_options(Rest, State#mochiweb_socket_server{name=Name});
parse_options([{name, A} | Rest], State) when A =:= undefined ->
parse_options(Rest, State#mochiweb_socket_server{name=A});
parse_options([{name, A} | Rest], State) when is_atom(A) ->
Name = {local, A},
parse_options(Rest, State#mochiweb_socket_server{name=Name});
parse_options([{name, Name} | Rest], State) ->
parse_options(Rest, State#mochiweb_socket_server{name=Name});
parse_options([{port, L} | Rest], State) when is_list(L) ->
Port = list_to_integer(L),
parse_options(Rest, State#mochiweb_socket_server{port=Port});
parse_options([{port, Port} | Rest], State) ->
parse_options(Rest, State#mochiweb_socket_server{port=Port});
parse_options([{ip, Ip} | Rest], State) ->
ParsedIp = case Ip of
any ->
any;
Ip when is_tuple(Ip) ->
Ip;
Ip when is_list(Ip) ->
{ok, IpTuple} = inet_parse:address(Ip),
IpTuple
end,
parse_options(Rest, State#mochiweb_socket_server{ip=ParsedIp});
parse_options([{loop, Loop} | Rest], State) ->
parse_options(Rest, State#mochiweb_socket_server{loop=Loop});
parse_options([{backlog, Backlog} | Rest], State) ->
parse_options(Rest, State#mochiweb_socket_server{backlog=Backlog});
parse_options([{nodelay, NoDelay} | Rest], State) ->
parse_options(Rest, State#mochiweb_socket_server{nodelay=NoDelay});
parse_options([{acceptor_pool_size, Max} | Rest], State) ->
MaxInt = ensure_int(Max),
parse_options(Rest,
State#mochiweb_socket_server{acceptor_pool_size=MaxInt});
parse_options([{max, Max} | Rest], State) ->
error_logger:info_report([{warning, "TODO: max is currently unsupported"},
{max, Max}]),
MaxInt = ensure_int(Max),
parse_options(Rest, State#mochiweb_socket_server{max=MaxInt});
parse_options([{ssl, Ssl} | Rest], State) when is_boolean(Ssl) ->
parse_options(Rest, State#mochiweb_socket_server{ssl=Ssl});
parse_options([{ssl_opts, SslOpts} | Rest], State) when is_list(SslOpts) ->
SslOpts1 = [{ssl_imp, new} | proplists:delete(ssl_imp, SslOpts)],
parse_options(Rest, State#mochiweb_socket_server{ssl_opts=SslOpts1}).
start_server(State=#mochiweb_socket_server{ssl=Ssl, name=Name}) ->
case Ssl of
true ->
application:start(crypto),
application:start(public_key),
application:start(ssl);
false ->
void
end,
case Name of
undefined ->
gen_server:start_link(?MODULE, State, []);
_ ->
gen_server:start_link(Name, ?MODULE, State, [])
end.
ensure_int(N) when is_integer(N) ->
N;
ensure_int(S) when is_list(S) ->
integer_to_list(S).
ipv6_supported() ->
case (catch inet:getaddr("localhost", inet6)) of
{ok, _Addr} ->
true;
{error, _} ->
false
end.
init(State=#mochiweb_socket_server{ip=Ip, port=Port, backlog=Backlog, nodelay=NoDelay}) ->
process_flag(trap_exit, true),
BaseOpts = [binary,
{reuseaddr, true},
{packet, 0},
{backlog, Backlog},
{recbuf, ?RECBUF_SIZE},
{active, false},
{nodelay, NoDelay}],
Opts = case Ip of
any ->
case ipv6_supported() of % IPv4, and IPv6 if supported
true -> [inet, inet6 | BaseOpts];
_ -> BaseOpts
end;
{_, _, _, _} -> % IPv4
[inet, {ip, Ip} | BaseOpts];
{_, _, _, _, _, _, _, _} -> % IPv6
[inet6, {ip, Ip} | BaseOpts]
end,
case listen(Port, Opts, State) of
{stop, eacces} ->
case Port < 1024 of
true ->
case fdsrv:start() of
{ok, _} ->
case fdsrv:bind_socket(tcp, Port) of
{ok, Fd} ->
listen(Port, [{fd, Fd} | Opts], State);
_ ->
{stop, fdsrv_bind_failed}
end;
_ ->
{stop, fdsrv_start_failed}
end;
false ->
{stop, eacces}
end;
Other ->
Other
end.
new_acceptor_pool(Listen,
State=#mochiweb_socket_server{acceptor_pool=Pool,
acceptor_pool_size=Size,
loop=Loop}) ->
F = fun (_, S) ->
Pid = mochiweb_acceptor:start_link(self(), Listen, Loop),
sets:add_element(Pid, S)
end,
Pool1 = lists:foldl(F, Pool, lists:seq(1, Size)),
State#mochiweb_socket_server{acceptor_pool=Pool1}.
listen(Port, Opts, State=#mochiweb_socket_server{ssl=Ssl, ssl_opts=SslOpts}) ->
case mochiweb_socket:listen(Ssl, Port, Opts, SslOpts) of
{ok, Listen} ->
{ok, ListenPort} = mochiweb_socket:port(Listen),
{ok, new_acceptor_pool(
Listen,
State#mochiweb_socket_server{listen=Listen,
port=ListenPort})};
{error, Reason} ->
{stop, Reason}
end.
do_get(port, #mochiweb_socket_server{port=Port}) ->
Port;
do_get(active_sockets, #mochiweb_socket_server{active_sockets=ActiveSockets}) ->
ActiveSockets.
handle_call({get, Property}, _From, State) ->
Res = do_get(Property, State),
{reply, Res, State};
handle_call(_Message, _From, State) ->
Res = error,
{reply, Res, State}.
handle_cast({accepted, Pid, _Timing},
State=#mochiweb_socket_server{active_sockets=ActiveSockets}) ->
State1 = State#mochiweb_socket_server{active_sockets=1 + ActiveSockets},
{noreply, recycle_acceptor(Pid, State1)};
handle_cast(stop, State) ->
{stop, normal, State}.
terminate(_Reason, #mochiweb_socket_server{listen=Listen, port=Port}) ->
mochiweb_socket:close(Listen),
case Port < 1024 of
true ->
catch fdsrv:stop(),
ok;
false ->
ok
end.
code_change(_OldVsn, State, _Extra) ->
State.
recycle_acceptor(Pid, State=#mochiweb_socket_server{
acceptor_pool=Pool,
listen=Listen,
loop=Loop,
active_sockets=ActiveSockets}) ->
case sets:is_element(Pid, Pool) of
true ->
Acceptor = mochiweb_acceptor:start_link(self(), Listen, Loop),
Pool1 = sets:add_element(Acceptor, sets:del_element(Pid, Pool)),
State#mochiweb_socket_server{acceptor_pool=Pool1};
false ->
State#mochiweb_socket_server{active_sockets=ActiveSockets - 1}
end.
handle_info({'EXIT', Pid, normal}, State) ->
{noreply, recycle_acceptor(Pid, State)};
handle_info({'EXIT', Pid, Reason},
State=#mochiweb_socket_server{acceptor_pool=Pool}) ->
case sets:is_element(Pid, Pool) of
true ->
%% If there was an unexpected error accepting, log and sleep.
error_logger:error_report({?MODULE, ?LINE,
{acceptor_error, Reason}}),
timer:sleep(100);
false ->
ok
end,
{noreply, recycle_acceptor(Pid, State)};
handle_info(Info, State) ->
error_logger:info_report([{'INFO', Info}, {'State', State}]),
{noreply, State}.
%%
%% Tests
%%
-include_lib("eunit/include/eunit.hrl").
-ifdef(TEST).
-endif.
|
