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yaws_server.erl
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yaws_server.erl
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%%%----------------------------------------------------------------------
%%% File : yaws_server.erl
%%% Author : Claes Wikstrom <klacke@hyber.org>
%%% Purpose :
%%% Created : 16 Jan 2002 by Claes Wikstrom <klacke@hyber.org>
%%%----------------------------------------------------------------------
-module(yaws_server).
-author('klacke@hyber.org').
-behaviour(gen_server).
-include("../include/yaws.hrl").
-include("../include/yaws_api.hrl").
-include("yaws_debug.hrl").
-include_lib("kernel/include/file.hrl").
-include_lib("kernel/include/inet.hrl").
-export([mappath/3, vdirpath/3]).
%% External exports
-export([start_link/1]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2]).
-export([status/0,
getconf/0,
stats/0,
gs_status/0,
ssi/3,ssi/5,ssi/6
]).
%% internal exports
-export([gserv/3,acceptor0/2, load_and_run/2, done_or_continue/0,
accumulate_content/1, deliver_accumulated/5, setup_dirs/1,
deliver_dyn_part/8, finish_up_dyn_file/2
]).
-export(['GET'/3,
'POST'/3,
'HEAD'/3,
'TRACE'/3,
'OPTIONS'/3,
'PUT'/3,
'DELETE'/3]).
-import(filename, [join/1]).
-import(lists, [member/2, foreach/2, map/2,
flatten/1, flatmap/2, reverse/1]).
-import(yaws_api, [ehtml_expand/1]).
-record(gs, {gconf,
group, %% list of #sconf{} s
ssl, %% ssl | nossl
l, %% listen socket
mnum = 0,
sessions = 0, %% number of HTTP sessions
reqs = 0}). %% number of HTTP requests
-record(state, {gc, %% Global conf #gc{} record
pairs, %% [{GservPid, ScList}]
mnum = 0, %% dyn compiled erl module number
embedded %% true if in embedded mode, false otherwise
}).
-define(elog(X,Y), error_logger:info_msg("*elog ~p:~p: " X,
[?MODULE, ?LINE | Y])).
start_link(A) ->
gen_server:start_link({local, yaws_server}, yaws_server, A, []).
status() ->
gen_server:call(?MODULE, status, 10000).
gs_status() ->
[_|Pids] = gen_server:call(?MODULE, pids, 10000),
lists:map(
fun(P) ->
P ! {self(), status},
receive {P, Stat} -> Stat end
end, Pids).
getconf() ->
gen_server:call(?MODULE,getconf, infinity).
stats() ->
{_S, Time} = status(),
Diff = calendar:time_difference(Time, calendar:local_time()),
{Diff, []}.
l2a(L) when list(L) -> list_to_atom(L);
l2a(A) when atom(A) -> A.
%%----------------------------------------------------------------------
%% Func: init/1
%% Returns: {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%%----------------------------------------------------------------------
init(Env) -> %% #env{Trace, TraceOut, Conf, RunMod, Embedded, Id}) ->
process_flag(trap_exit, true),
put(start_time, calendar:local_time()), %% for uptime
case Env#env.embedded of
false ->
Config = (catch yaws_config:load(Env)),
case Config of
{ok, Gconf, Sconfs} ->
erase(logdir),
?Debug("GC = ~s~n", [?format_record(Gconf, gconf)]),
lists:foreach(
fun(Group) ->
lists:foreach(
fun(_SC) ->
?Debug("SC = ~s~n",
[?format_record(_SC, sconf)])
end, Group)
end, Sconfs),
yaws_log:setdir(Gconf, Sconfs),
case Gconf#gconf.trace of
{true, What} ->
yaws_log:open_trace(What),
yaws_api:set_tty_trace(?gc_has_tty_trace(Gconf));
_ ->
ok
end,
init2(Gconf, Sconfs, Env#env.runmod,
Env#env.embedded, true);
{error, E} ->
case erase(logdir) of
undefined ->
error_logger:error_msg("Yaws: Bad conf: ~p~n",[E]),
init:stop(),
{stop, E};
Dir ->
GC = yaws_config:make_default_gconf(true,
Env#env.id),
yaws_log:setdir(GC#gconf{logdir = Dir}, []),
error_logger:error_msg("Yaws: bad conf: ~s "
"terminating~n",[E]),
init:stop(),
{stop, E}
end;
EXIT ->
error_logger:format("FATAL ~p~n", [EXIT]),
erlang:error(badconf)
end;
true ->
{ok, #state{gc = undefined,
embedded = Env#env.embedded,
pairs = [],
mnum = 0}}
end.
init2(GC, Sconfs, RunMod, Embedded, FirstTime) ->
put(gc, GC),
case GC#gconf.mnesia_dir of
MD when length(MD) > 0 ->
yaws_debug:format("loading mnesia ~p~n", [MD]),
application:set_env(mnesia,dir,MD),
mnesia:start();
_ ->
yaws_debug:format("mnesia not in yaws.conf ~n", []),
ok
end,
foreach(
fun(D) ->
yaws_debug:format("Add path ~p~n", [D]),
code:add_pathz(D)
end, GC#gconf.ebin_dir),
yaws_debug:format("Running with id=~p (localinstall=~p) ~n"
"~s"
"Logging to directory ~p~n",
[GC#gconf.id, yaws_generated:is_local_install(),
if ?gc_has_debug(GC) ->
"Running with debug checks "
"turned on (slower server) \n";
true ->
""
end,
GC#gconf.logdir]),
setup_dirs(GC),
case Embedded of
false ->
case yaws_ctl:start(GC, FirstTime) of
ok ->
ok;
{error, RSN} ->
%% Must call init stop here otherwise heart
%% will restart us
error_logger:format("Failed to start: ~s~n", [RSN]),
init:stop(),
receive nothing -> ok end
end;
true ->
ok
end,
runmod(RunMod, GC),
L2 = lists:zf(
fun(Group) -> start_group(GC, Group) end,
Sconfs),
{ok, #state{gc = GC,
pairs = L2,
mnum = 0,
embedded = Embedded}}.
start_group(GC, Group) ->
FailOnBind = ?gc_fail_on_bind_err(GC),
case proc_lib:start_link(?MODULE, gserv, [self(), GC, Group]) of
{error, F, A} when FailOnBind == false ->
error_logger:error_msg(F, A),
false;
{error, F, A} ->
error_logger:error_msg(F, A),
erlang:error(badbind);
{error, Reason} when FailOnBind == false ->
error_logger:error_msg("FATAL: ~p~n", [Reason]),
false;
{error, Reason} ->
error_logger:error_msg("FATAL: ~p~n", [Reason]),
erlang:error(badbind);
{Pid, SCs} ->
{true, {Pid, SCs}};
none ->
false
end.
%%----------------------------------------------------------------------
%% Func: handle_call/3
%% Returns: {reply, Reply, State} |
%% {reply, Reply, State, Timeout} |
%% {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, Reply, State} | (terminate/2 is called)
%% {stop, Reason, State} (terminate/2 is called)
%%----------------------------------------------------------------------
handle_call(status, _From, State) ->
Reply = {State, get(start_time)},
{reply, Reply, State};
handle_call(id, _From, State) ->
{reply, (State#state.gc)#gconf.id, State};
handle_call(pids, _From, State) -> %% for gprof
L = map(fun(X) ->element(1, X) end, State#state.pairs),
{reply, [self() | L], State};
handle_call(mnum, _From, State) ->
Mnum = State#state.mnum +1,
{reply, Mnum, State#state{mnum = Mnum}};
%% This is a brutal restart of everything
handle_call({setconf, GC, Groups}, _From, State) ->
%% First off, terminate all currently running processes
Curr = map(fun(X) ->element(1, X) end, State#state.pairs),
foreach(fun(Pid) ->
gserv_stop(Pid)
end, Curr),
{ok, State2} = init2(GC, Groups, undef, State#state.embedded, false),
{reply, ok, State2};
handle_call(getconf, _From, State) ->
Groups = map(fun({_Pid, SCs}) -> SCs end, State#state.pairs),
{reply, {ok, State#state.gc, Groups}, State};
handle_call({update_sconf, NewSc}, From, State) ->
case yaws_config:search_sconf(NewSc, State#state.pairs) of
{Pid, OldSc, _Group} ->
case yaws_config:eq_sconfs(OldSc,NewSc) of
true ->
error_logger:info_msg("Keeping conf for ~s intact\n",
[yaws:sconf_to_srvstr(OldSc)]),
{reply, ok, State};
false ->
Pid ! {update_sconf, NewSc, OldSc, From, self()},
receive
{updated_sconf, NewSc2} ->
P2 = yaws_config:update_sconf(NewSc2,
State#state.pairs),
{noreply, State#state{pairs = P2}}
after 2000 ->
{reply, {error, "Failed to update new conf"}, State}
end
end;
false ->
{reply, {error, "No matching group"}, State}
end;
handle_call({delete_sconf, SC}, From, State) ->
case yaws_config:search_sconf(SC, State#state.pairs) of
{Pid, OldSc, Group} when length(Group) == 1 ->
error_logger:info_msg("Terminate whole ~s virt server group \n",
[yaws:sconf_to_srvstr(OldSc)]),
gserv_stop(Pid),
NewPairs = lists:keydelete(Pid, 1, State#state.pairs),
{reply, ok, State#state{pairs = NewPairs}};
{Pid, OldSc, _Group} ->
Pid ! {delete_sconf, OldSc, From},
P2 = yaws_config:delete_sconf(OldSc, State#state.pairs),
{noreply, State#state{pairs = P2}};
false ->
{reply, {error, "No matching group"}, State}
end;
handle_call({add_sconf, SC}, From, State) ->
case yaws_config:search_group(SC, State#state.pairs) of
[{Pid, Group}] ->
Pid ! {add_sconf, From, SC},
P2 = lists:keyreplace(Pid, 1, State#state.pairs,
{Pid, [SC|Group]}),
{noreply, State#state{pairs = P2}};
[] ->
%% Need to create a new group
error_logger:info_msg("Creating new virt server ~s\n",
[yaws:sconf_to_srvstr(SC)]),
GC = State#state.gc,
case start_group(GC, [SC]) of
false ->
{reply, ok, State};
{true, Pair} ->
%Pid = element(1, Pair),
%Pid ! {newuid, GC#gconf.uid},
P2 = [Pair | State#state.pairs],
{reply, ok, State#state{pairs = P2}}
end
end;
handle_call({update_gconf, GC}, _From, State) ->
lists:foreach(fun({Pid, _Group}) ->
Pid ! {update_gconf, GC}
end, State#state.pairs),
%% no need to tell yaws_log, new vals must be compatible
put(gc, GC),
{reply, ok, State#state{gc = GC}}.
%%----------------------------------------------------------------------
%% Func: handle_cast/2
%% Returns: {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State} (terminate/2 is called)
%%----------------------------------------------------------------------
handle_cast(_Msg, State) ->
{noreply, State}.
%%----------------------------------------------------------------------
%% Func: handle_info/2
%% Returns: {noreply, State} |
%% {noreply, State, Timeout} |
%% {stop, Reason, State} (terminate/2 is called)
%%----------------------------------------------------------------------
handle_info({'EXIT', Pid, Reason}, State) ->
?Debug("got EXIT Pid = ~p~n"
" pairs = ~p~n", [Pid, State#state.pairs]),
case lists:keysearch(Pid, 1, State#state.pairs) of
{value, _} ->
%% one of our gservs died
error_logger:format("yaws: FATAL gserv died ~p~n", [Reason]),
erlang:error(restartme);
false ->
ignore
end,
{noreply, State};
handle_info(_Msg, State) ->
?Debug("GOT ~p~n", [_Msg]),
{noreply, State}.
%%----------------------------------------------------------------------
%% Func: terminate/2
%% Purpose: Shutdown the server
%% Returns: any (ignored by gen_server)
%%----------------------------------------------------------------------
terminate(_Reason, _State) ->
ok.
do_listen(GC, SC) ->
case SC#sconf.ssl of
undefined when ?gc_use_fdsrv(GC) ->
%% Use fdsrv kit from jungerl, requires fdsrv
%% to be properly installed
fdsrv:start(),
case fdsrv:bind_socket(tcp, {SC#sconf.listen, SC#sconf.port}) of
{ok, Fd} ->
{nossl, gen_tcp_listen(SC#sconf.port,[{fd, Fd}|opts(SC)])};
Err ->
{nossl, Err}
end;
undefined ->
{nossl, gen_tcp_listen(SC#sconf.port, opts(SC))};
SSL ->
{ssl, ssl:listen(SC#sconf.port, ssl_opts(GC, SC, SSL))}
end.
gen_tcp_listen(Port, Opts) ->
?Debug("Listen ~p:~p~n", [Port, Opts]),
gen_tcp:listen(Port, Opts).
gserv(_Top, _, []) ->
proc_lib:init_ack(none);
%% One server per IP we listen to
gserv(Top, GC, Group0) ->
process_flag(trap_exit, true),
?TC([{record, GC, gconf}]),
put(gc, GC),
put(top, Top),
Group = map(fun(SC) -> setup_ets(SC)
end, Group0),
SC = hd(Group),
case do_listen(GC, SC) of
{SSLBOOL, {ok, Listen}} ->
lists:foreach(fun(XSC) -> call_start_mod(XSC) end, Group),
error_logger:info_msg(
"Yaws: Listening to ~s:~w for servers~s~n",
[inet_parse:ntoa(SC#sconf.listen),
SC#sconf.port,
catch map(
fun(S) ->
io_lib:format("~n - ~s under ~s",
[yaws:sconf_to_srvstr(S),
S#sconf.docroot])
end, Group)
]),
proc_lib:init_ack({self(), Group}),
GS = #gs{gconf = GC,
group = Group,
ssl = SSLBOOL,
l = Listen},
Last = initial_acceptor(GS),
gserv_loop(GS, [], 0, Last);
{_,Err} ->
error_logger:format("Yaws: Failed to listen ~s:~w : ~p~n",
[inet_parse:ntoa(SC#sconf.listen),
SC#sconf.port, Err]),
proc_lib:init_ack({error, "Can't listen to socket: ~p ",[Err]}),
exit(normal)
end.
setup_dirs(GC) ->
Dir = yaws:id_dir(GC#gconf.id),
Ctl = yaws:ctl_file(GC#gconf.id),
filelib:ensure_dir(Ctl),
case file:list_dir(Dir) of
{ok, LL} ->
foreach(
fun(F) ->
file:delete(filename:join([Dir, F]))
end, LL -- ["CTL"]);
{error, RSN} ->
error_logger:format("Failed to list ~p probably "
"due to permission errs: ~p",
[Dir, RSN]),
erlang:error(RSN)
end.
setup_ets(SC) ->
E = ets:new(yaws_code, [public, set]),
ets:insert(E, {num_files, 0}),
ets:insert(E, {num_bytes, 0}),
SC#sconf{ets = E}.
clear_ets_complete(SC) ->
case SC#sconf.ets of
undefined ->
setup_ets(SC);
E ->
ets:match_delete(E,'_'),
ets:insert(E, {num_files, 0}),
ets:insert(E, {num_bytes, 0}),
SC
end.
gserv_loop(GS, Ready, Rnum, Last) ->
receive
{From , status} ->
From ! {self(), GS},
gserv_loop(GS, Ready, Rnum, Last);
{_From, next} when Ready == [] ->
New = acceptor(GS),
gserv_loop(GS, Ready, Rnum, New);
{_From, next} ->
[{_Then, R}|RS] = Ready,
R ! {self(), accept},
gserv_loop(GS, RS, Rnum-1, R);
{From, done_client, Int} ->
GS2 = if
Int == 0 -> GS;
Int > 0 -> GS#gs{sessions = GS#gs.sessions + 1,
reqs = GS#gs.reqs + Int}
end,
if
Rnum == 8 ->
From ! {self(), stop},
gserv_loop(GS2, Ready, Rnum, Last);
Rnum < 8 ->
%% cache this process for 10 secs
gserv_loop(GS2, [{now(), From} | Ready], Rnum+1, Last)
end;
{'EXIT', Pid, Reason} ->
case get(top) of
Pid when Reason /= shutdown ->
error_logger:format("Top proc died, terminate gserv",[]),
{links, Ls} = process_info(self(), links),
foreach(fun(X) -> unlink(X), exit(X, shutdown) end, Ls),
exit(noserver);
Pid ->
{links, Ls} = process_info(self(), links),
foreach(fun(X) -> unlink(X), exit(X, shutdown) end, Ls),
exit(normal);
_ when Reason == failaccept ->
error_logger:format("Accept proc died, terminate gserv",[]),
{links, Ls} = process_info(self(), links),
foreach(fun(X) -> unlink(X), exit(X, shutdown) end, Ls),
exit(noserver);
_ ->
gserv_loop(GS, Ready, Rnum, Last)
end;
{From, stop} ->
unlink(From),
{links, Ls} = process_info(self(), links),
foreach(fun(X) -> unlink(X), exit(X, shutdown) end, Ls),
From ! {self(), ok},
exit(normal);
%% This code will shutdown all ready procs as well as the
%% acceptor()
{update_sconf, NewSc, OldSc, From, Updater} ->
case lists:member(OldSc, GS#gs.group) of
false ->
error_logger:error_msg("gserv: No found SC ~p/~p~n",
[OldSc, GS#gs.group]),
erlang:error(nosc);
true ->
stop_ready(Ready, Last),
NewSc2 = clear_ets_complete(NewSc),
GS2 = GS#gs{group = [ NewSc2 |
lists:delete(OldSc,GS#gs.group)]},
Ready2 = [],
Updater ! {updated_sconf, NewSc2},
gen_server:reply(From, ok),
error_logger:info_msg("Updating sconf for server ~s~n",
[yaws:sconf_to_srvstr(NewSc2)]),
New = acceptor(GS2),
gserv_loop(GS2, Ready2, 0, New)
end;
{delete_sconf, OldSc, From} ->
case lists:member(OldSc, GS#gs.group) of
false ->
error_logger:error_msg("gserv: No found SC ~n",[]),
erlang:error(nosc);
true ->
stop_ready(Ready, Last),
GS2 = GS#gs{group = lists:delete(OldSc,GS#gs.group)},
Ready2 = [],
ets:delete(OldSc#sconf.ets),
gen_server:reply(From, ok),
error_logger:info_msg("Deleting sconf for server ~s~n",
[yaws:sconf_to_srvstr(OldSc)]),
New = acceptor(GS2),
gserv_loop(GS2, Ready2, 0, New)
end;
{add_sconf, From, SC} ->
stop_ready(Ready, Last),
GS2 = GS#gs{group = [setup_ets(SC) |GS#gs.group]},
Ready2 = [],
gen_server:reply(From, ok),
error_logger:info_msg("Adding sconf for server ~s~n",
[yaws:sconf_to_srvstr(SC)]),
New = acceptor(GS2),
gserv_loop(GS2, Ready2, 0, New);
{update_gconf, GC} ->
stop_ready(Ready, Last),
GS2 = GS#gs{gconf = GC},
Ready2 = [],
put(gc, GC),
error_logger:info_msg("Updating gconf \n",[]),
New = acceptor(GS2),
gserv_loop(GS2, Ready2, 0, New)
after (10 * 1000) ->
%% collect old procs, to save memory
{NowMega, NowSecs, _} = now(),
R2 = lists:filter(fun({{ThenMega, ThenSecs, _}, Pid}) ->
if
NowMega > ThenMega;
(NowSecs > (ThenSecs + 8)) ->
Pid ! {self(), stop},
false;
true ->
true
end
end, Ready),
gserv_loop(GS, R2, Rnum, Last)
end.
stop_ready(Ready, Last) ->
unlink(Last),
exit(Last, shutdown),
lists:foreach(
fun({_,Pid}) ->
Pid ! {self(), stop}
end, Ready).
gserv_stop(Gpid) ->
Gpid ! {self(), stop},
receive
{Gpid, ok} ->
ok
end.
call_start_mod(SC) ->
case SC#sconf.start_mod of
undefined ->
ok;
Mod0 ->
Mod = l2a(Mod0),
case code:ensure_loaded(Mod) of
{module, Mod} ->
error_logger:info_msg(
"Yaws: calling start_mod: ~p:start/1~n", [Mod]),
spawn(Mod, start, [SC]);
Err ->
error_logger:format("Cannot load module ~p: ~p~n",
[Mod,Err])
end
end.
opts(SC) ->
[binary,
{ip, SC#sconf.listen},
{packet, http},
{recbuf, 8192},
{reuseaddr, true},
{active, false}
].
ssl_opts(GC, SC, SSL) ->
Opts = [
binary,
{ip, SC#sconf.listen},
{packet, http},
{active, false} | ssl_opts(GC, SSL)],
Opts.
ssl_opts(GC, SSL) ->
L = [if SSL#ssl.keyfile /= undefined ->
{keyfile, SSL#ssl.keyfile};
true ->
false
end,
if SSL#ssl.certfile /= undefined ->
{certfile, SSL#ssl.certfile};
true ->
false
end,
if SSL#ssl.cacertfile /= undefined ->
{cacertfile, SSL#ssl.cacertfile};
true ->
false
end,
if SSL#ssl.verify /= undefined ->
{verify, SSL#ssl.verify};
true ->
false
end,
if SSL#ssl.password /= undefined ->
{password, SSL#ssl.password};
true ->
false
end,
if SSL#ssl.ciphers /= undefined ->
{ciphers, SSL#ssl.ciphers};
true ->
false
end,
if ?gc_use_old_ssl(GC) ->
false;
true ->
%{ssl_imp, new} .... doesn't work yet
false
end
],
filter_false(L).
filter_false(L) ->
[X || X <- L, X /= false].
do_accept(GS) when GS#gs.ssl == nossl ->
?Debug("wait in accept ... ~n",[]),
gen_tcp:accept(GS#gs.l);
do_accept(GS) when GS#gs.ssl == ssl ->
ssl:transport_accept(GS#gs.l,10000).
initial_acceptor(GS) ->
acceptor(GS).
acceptor(GS) ->
proc_lib:spawn_link(?MODULE, acceptor0, [GS, self()]).
acceptor0(GS, Top) ->
?TC([{record, GS, gs}]),
put(gc, GS#gs.gconf),
X = do_accept(GS),
Top ! {self(), next},
case X of
{ok, Client} ->
if
GS#gs.ssl == ssl ->
case ssl:ssl_accept(Client) of
ok ->
ok;
{error, Reason} ->
error_logger:format("SSL accept failed: ~p~n",
[Reason]),
exit(normal)
end;
true ->
ok
end,
case (GS#gs.gconf)#gconf.trace of %% traffic trace
{true, _} ->
case peername(Client, GS#gs.ssl) of
{ok, {IP, Port}} ->
Str = ?F("New (~p) connection from ~s:~w~n",
[GS#gs.ssl, inet_parse:ntoa(IP),Port]),
yaws_log:trace_traffic(from_client, Str);
_ ->
ignore
end;
_ ->
ok
end,
Res = (catch aloop(Client, GS, 0)),
if
GS#gs.ssl == nossl ->
gen_tcp:close(Client);
GS#gs.ssl == ssl ->
ssl:close(Client)
end,
case Res of
{ok, Int} when integer(Int) ->
Top ! {self(), done_client, Int};
{'EXIT', normal} ->
exit(normal);
{'EXIT', shutdown} ->
exit(shutdown);
{'EXIT', {error, einval}} ->
%% Typically clients that close their end of the socket
%% don't log. Happens all the time.
exit(normal);
{'EXIT', {{error, einval}, _}} ->
exit(normal);
{'EXIT', {error, closed}} ->
exit(normal);
{'EXIT', {{error, closed}, _}} ->
exit(normal);
{'EXIT', {{error, econnreset},_}} ->
exit(normal);
{'EXIT', Reason2} ->
error_logger:error_msg("Yaws process died: ~p~n",
[Reason2]),
exit(shutdown)
end,
%% we cache processes
receive
{Top, stop} ->
exit(normal);
{Top, accept} ->
erase_transients(),
acceptor0(GS, Top)
end;
{error, Reason} when ((Reason == timeout) or
(Reason == einval) or
(Reason == normal) or
(Reason == econnaborted)) ->
%% The econnaborted is
%% caused by recieving a RST when a SYN or SYN+ACK was expected.
%% einval is reported to happen, it could be accept attempts
%% on just recently reconfigured servers through --hup ... ???
Top ! {self(), done_client, 0},
receive
{Top, stop} ->
exit(normal);
{Top, accept} ->
acceptor0(GS, Top)
end;
{error, closed} ->
%% This is what happens when we call yaws --stop
exit(normal);
ERR ->
%% When we fail to accept, the correct thing to do
%% is to terminate yaws as an application, if we're running
%% yaws as a standalone webserver, we want to restart the
%% entire webserver, preferably through heart
%% typical errors here are shortage of fds or memory
error_logger:format("yaws: Failed to accept - terminating: ~p~n",
[ERR]),
exit(failaccept)
end.
%%%----------------------------------------------------------------------
%%% Internal functions
%%%----------------------------------------------------------------------
aloop(CliSock, GS, Num) ->
put(init_db, get()),
SSL = GS#gs.ssl,
case yaws:http_get_headers(CliSock, SSL) of
{Req0, H0} when Req0#http_request.method /= bad_request ->
{Req, H} = fix_abs_uri(Req0, H0),
SC = pick_sconf(GS#gs.gconf, H, GS#gs.group, SSL),
?Debug("SC: ~s", [?format_record(SC, sconf)]),
?TC([{record, SC, sconf}]),
?Debug("Headers = ~s~n", [?format_record(H, headers)]),
?Debug("Request = ~s~n", [?format_record(Req, http_request)]),
IP = case ?sc_has_access_log(SC) of
true ->
case peername(CliSock, SSL) of
{ok, {Ip, _Port}} ->
case ?gc_log_has_resolve_hostname(
(GS#gs.gconf)) of
true ->
case inet:gethostbyaddr(Ip) of
{ok, HE} ->
HE#hostent.h_name;
_ ->
Ip
end;
false ->
Ip
end;
_ ->
undefined
end;
_ ->
undefined
end,
put(outh, #outh{}),
put(sc, SC),
Call = call_method(Req#http_request.method, CliSock, Req, H),
handle_method_result(Call, CliSock, IP, GS, Req, H, Num);
closed ->
{ok, Num};
_ ->
% not even HTTP traffic
exit(normal)
end.
erase_transients() ->
%% flush all messages
Fun = fun(G) -> receive
_X -> G(G)
after 0 -> ok
end
end,
Fun(Fun),
I = get(init_db),
erase(),
if I == undefined ->
ok;
list(I) ->
lists:foreach(fun({K,V}) -> put(K,V) end, I)
end.
handle_method_result(Res, CliSock, IP, GS, Req, H, Num) ->
case Res of
continue ->
maybe_access_log(IP, Req, H),
erase_transients(),
aloop(CliSock, GS, Num+1);
done ->
maybe_access_log(IP, Req, H),
erase_transients(),
{ok, Num+1};
{page, P} ->
%% keep post_parse
erase(query_parse),
put(outh, #outh{}),
case P of
{Options, Page} ->
%% We got additional headers
%% for the page to deliver.
%%
%% Might be useful for
%% `Vary' or
%% `Content-Location'.
deepforeach(
fun(X) -> case X of
{header, Header} ->
yaws:accumulate_header(Header);
_Something ->
?Debug("Got ~p in page option list.",
[_Something])
end
end,
Options);
Page ->
ok
end,
put (sc, (get(sc))#sconf{appmods = []}),
Call = call_method(Req#http_request.method,
CliSock,
Req#http_request{path = {abs_path, Page}},
H#headers{content_length = undefined}),
handle_method_result(Call, CliSock, IP, GS, Req, H, Num)
end.
peername(CliSock, ssl) ->
ssl:peername(CliSock);
peername(CliSock, nossl) ->
inet:peername(CliSock).
deepforeach(_F, []) ->
ok;
deepforeach(F, [H|T]) ->
deepforeach(F, H),
deepforeach(F, T);
deepforeach(F, X) ->
F(X).
fix_abs_uri(Req, H) ->
case Req#http_request.path of
{absoluteURI, _Scheme, Host0, Port, RawPath} ->
Host = case Port of
P when integer(P) ->
Host0 ++ [$: | integer_to_list(P)];
% Is this ok?
_ ->
Host0
end,
{Req#http_request{path={abs_path, RawPath}},
H#headers{host=Host}};
_ -> {Req, H}
end.
%% compare servername and ignore any optional
%% :Port postfix
comp_sname([$:|_], _) -> true;
comp_sname(_, [$:|_]) -> true;
comp_sname([H|T], [H|T1]) -> comp_sname(T,T1);
comp_sname([],[])-> true;
comp_sname(_,_)-> false.
pick_sconf(GC, H, [SC|_Group], ssl) ->
case comp_sname(H#headers.host, SC#sconf.servername) of