/
yaws_server.erl
1332 lines (1128 loc) · 36.1 KB
/
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').
-compile(export_all).
%%-export([Function/Arity, ...]).
-behaviour(gen_server).
-include("yaws.hrl").
-include_lib("kernel/include/file.hrl").
%% External exports
-export([start_link/0]).
%% gen_server callbacks
-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2]).
-import(filename, [join/1]).
-import(lists, [foreach/2, map/2, flatten/1, flatmap/2]).
-record(gs, {gconf,
group, %% list of #sconf{} s
l, %% listen socket
mnum = 0, %% dyn compiled erl module number
sessions = 0, %% number of HTTP sessions
reqs = 0}). %% number of HTTP requests
%%%----------------------------------------------------------------------
%%% API
%%%----------------------------------------------------------------------
start_link() ->
gen_server:start_link({local, yaws_server}, yaws_server, [], []).
status() ->
gen_server:call(?MODULE, status).
stats() ->
{S, Time} = status(),
{GC, Srvs, _} = S,
Diff = calendar:time_difference(Time, calendar:local_time()),
G = fun(L) -> lists:reverse(lists:keysort(2, L)) end,
R= flatmap(
fun({Pid, SCS}) ->
map(
fun(SC) ->
E = SC#sconf.ets,
L = ets:match(E, {{urlc_total, '$1'}, '$2'}),
{SC#sconf.servername,
flatten(yaws:fmt_ip(SC#sconf.listen)),
G(map(fun(P) -> list_to_tuple(P) end, L))}
end, SCS)
end, Srvs),
{Diff, R}.
%%----------------------------------------------------------------------
%% Func: init/1
%% Returns: {ok, State} |
%% {ok, State, Timeout} |
%% ignore |
%% {stop, Reason}
%%----------------------------------------------------------------------
init([]) ->
put(start_time, calendar:local_time()), %% for uptime
case yaws_config:load() of
{ok, Gconf, Sconfs} ->
erase(logdir),
?Debug("Conf = ~p~n", [?format_record(Gconf, gconf)]),
yaws_log:setdir(Gconf#gconf.logdir),
init2(Gconf, Sconfs);
{error, E} ->
case erase(logdir) of
undefined ->
error_logger:format("Bad conf: ~p", [E]),
{stop, E};
Dir ->
yaws_log:setdir(Dir),
yaws_log:sync_errlog("bad conf: ~s",[E]),
{stop, E}
end
end.
init2(Gconf, Sconfs) ->
lists:foreach(
fun(D) ->
code:add_pathz(D)
end, Gconf#gconf.ebin_dir),
process_flag(trap_exit, true),
%% start the individual server processes
L = lists:map(
fun(Group) ->
proc_lib:start_link(?MODULE, gserv, [Gconf, Group])
end, Sconfs),
L2 = lists:zf(fun({error, F, A}) ->
yaws_log:sync_errlog(F, A),
false;
({Pid, SCs}) ->
true
end, L),
if
length(L) == length(L2) ->
{ok, {Gconf, L2, 0}};
true ->
{stop, "failed to start server "}
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(mnum, From, {GC, Group, Mnum}) ->
{reply, Mnum+1, {GC, Group, Mnum+1}}.
%%----------------------------------------------------------------------
%% 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(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.
%% One server per IP we listen to
gserv(GC, Group0) ->
?TC([{record, GC, gconf}]),
Group = map(fun(SC) ->
E = ets:new(yaws_code, [public, set]),
ets:insert(E, {num_files, 0}),
ets:insert(E, {num_bytes, 0}),
SC#sconf{ets = E}
end, Group0),
SC = hd(Group),
case gen_tcp:listen(SC#sconf.port, opts(SC)) of
{ok, Listen} ->
?Debug("XX",[]),
error_logger:info_msg("Listening to ~s:~w for servers ~p~n",
[yaws:fmt_ip(SC#sconf.listen),
SC#sconf.port,
catch map(fun(S) -> S#sconf.servername end, Group)]),
?Debug("XX",[]),
file:make_dir("/tmp/yaws"),
{ok, Files} = file:list_dir("/tmp/yaws"),
lists:foreach(
fun(F) -> file:delete("/tmp/yaws/" ++ F) end, Files),
proc_lib:init_ack({self(), Group}),
GS = #gs{gconf = GC,
group = Group,
l = Listen},
acceptor(GS),
gserv(GS, [], 0);
Err ->
error_logger:format("Failed to listen ~s:~w : ~p~n",
[yaws:fmt_ip(SC#sconf.listen),
SC#sconf.port, Err]),
proc_lib:init_ack({error, "Can't listen to socket: ~p ",[Err]}),
exit(normal)
end.
gserv(GS, Ready, Rnum) ->
receive
{From , status} ->
From ! {self(), GS},
gserv(GS, Ready, Rnum);
{From, next} when Ready == [] ->
acceptor(GS),
gserv(GS, Ready, Rnum);
{From, next} ->
[R|RS] = Ready,
R ! {self(), accept},
gserv(GS, RS, Rnum-1);
{From, done_client, Int} ->
GS2 = GS#gs{sessions = GS#gs.sessions + 1,
reqs = GS#gs.reqs + Int},
if
Rnum == 8 ->
From ! {self(), stop},
gserv(GS2, Ready, Rnum);
Rnum < 8 ->
gserv(GS2, [From | Ready], Rnum+1)
end
end.
opts(SC) ->
[binary,
{ip, SC#sconf.listen},
{packet, http},
{reuseaddr, true},
{active, false}
].
acceptor(GS) ->
proc_lib:spawn_link(yaws_server, acceptor0, [GS, self()]).
acceptor0(GS, Top) ->
?TC([{record, GS, gs}]),
L = GS#gs.l,
X = gen_tcp:accept(L),
?Debug("Accept ret:~p L=~p~n", [X,L]),
Top ! {self(), next},
case X of
{ok, Client} ->
Res = (catch aloop(Client, GS, 0)),
gen_tcp:close(Client),
?Debug("RES = ~p~n", [Res]),
case Res of
{ok, Int} when integer(Int) ->
Top ! {self(), done_client, Int};
Other ->
Top ! {self(), done_client, 0}
end,
%% we cache processes
receive
{Top, stop} ->
exit(normal);
{Top, accept} ->
acceptor0(GS, Top)
end;
_ ->
exit(normal)
end.
%%%----------------------------------------------------------------------
%%% Internal functions
%%%----------------------------------------------------------------------
aloop(CliSock, GS, Num) ->
?TC([{record, GS, gs}]),
case get_headers(CliSock, GS#gs.gconf) of
done ->
{ok, Num};
{Req, H} ->
Sconf = pick_sconf(H, GS#gs.group),
?Debug("Sconf: ~p", [?format_record(Sconf, sconf)]),
?TC([{record, Sconf, sconf}]),
Res = apply(yaws_server, Req#http_request.method,
[CliSock, GS#gs.gconf, Sconf, Req, H]),
maybe_access_log(CliSock, Sconf, Req),
case Res of
continue ->
aloop(CliSock, GS, Num+1);
done ->
{ok, Num+1}
end
end.
pick_sconf(H, Group) ->
case H#headers.host of
undefined ->
pick_default(Group);
Host ->
pick_host(Host, Group, Group)
end.
pick_default([]) ->
yaws_log:errlog("No default host found in server group ",[]),
exit(normal);
pick_default([H|T]) when H#sconf.default_server_on_this_ip == true ->
H;
pick_default([_|T]) ->
pick_default(T).
pick_host(Host, [H|T], Group) when H#sconf.servername == Host ->
H;
pick_host(Host, [_|T], Group) ->
pick_host(Host, T, Group);
pick_host(Host, [], Group) ->
pick_default(Group).
maybe_access_log(CliSock, SC, Req) ->
?TC([{record, SC, sconf}]),
case SC#sconf.access_log of
true ->
{ok, {Ip, Port}} = inet:peername(CliSock),
Status = case erase(status_code) of
undefined -> "-";
I -> integer_to_list(I)
end,
Len = case erase(content_length) of
undefined ->
"-";
I2 -> integer_to_list(I2)
end,
Path = get_path(Req#http_request.path),
Meth = atom_to_list(Req#http_request.method),
yaws_log:accesslog(Ip, [Meth, $\s, Path] , Status, Len);
false ->
ignore
end.
get_path({abs_path, Path}) ->
Path.
get_headers(CliSock, GC) ->
?TC([{record, GC, gconf}]),
inet:setopts(CliSock, [{packet, http}]),
case gen_tcp:recv(CliSock, 0, GC#gconf.keepalive_timeout) of
{ok, R} when element(1, R) == http_request ->
H = get_headers(CliSock, R, GC, #headers{}),
{R, H};
{error, timeout} ->
done;
Err ->
?Debug("Got ~p~n", [Err]),
exit(normal)
end.
get_headers(CliSock, Req, GC, H) ->
?TC([{record, GC, gconf}]),
case gen_tcp:recv(CliSock, 0, GC#gconf.timeout) of
{ok, {http_header, Num, 'Host', _, Host}} ->
get_headers(CliSock, Req, GC, H#headers{host = Host});
{ok, {http_header, Num, 'Connection', _, Conn}} ->
get_headers(CliSock, Req, GC, H#headers{connection = Conn});
{ok, {http_header, Num, 'Accept', _, Accept}} ->
get_headers(CliSock, Req, GC, H#headers{accept = Accept});
{ok, {http_header, Num, 'If-Modified-Since', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{if_modified_since = X});
{ok, {http_header, Num, 'If-Match', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{if_match = X});
{ok, {http_header, Num, 'If-None-Match', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{if_none_match = X});
{ok, {http_header, Num, 'If-Range', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{if_range = X});
{ok, {http_header, Num, 'If-Unmodified-Since', _, X}} ->
get_headers(CliSock, Req, GC,
H#headers{if_unmodified_since = X});
{ok, {http_header, Num, 'Range', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{range = X});
{ok, {http_header, Num, 'Referer',_, X}} ->
get_headers(CliSock, Req, GC, H#headers{referer = X});
{ok, {http_header, Num, 'User-Agent', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{user_agent = X});
{ok, {http_header, Num, 'Accept-Ranges', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{accept_ranges = X});
{ok, {http_header, Num, 'Cookie', _, X}} ->
get_headers(CliSock, Req, GC,
H#headers{cookie = [X|H#headers.cookie]});
{ok, {http_header, Num, 'Keep-Alive', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{keep_alive = X});
{ok, {http_header, Num, 'Content-Length', _, X}} ->
get_headers(CliSock, Req, GC, H#headers{content_length = X});
{ok, http_eoh} ->
H;
{ok, _} ->
get_headers(CliSock, Req, GC, H);
Err ->
exit(normal)
end.
%% ret: continue | done
'GET'(CliSock, GC, SC, Req, Head) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
?Debug("GET ~p", [Req#http_request.path]),
ok = inet:setopts(CliSock, [{packet, raw}, binary]),
flush(CliSock, Head#headers.content_length),
ARG = make_arg(CliSock, Head, Req, GC, SC),
handle_request(CliSock, GC, SC, Req, Head, ARG).
'POST'(CliSock, GC, SC, Req, Head) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
?Debug("POST Req=~p H=~p~n", [?format_record(Req, http_request),
?format_record(Head, headers)]),
ok = inet:setopts(CliSock, [{packet, raw}, binary]),
Bin = case Head#headers.content_length of
undefined ->
case Head#headers.connection of
"close" ->
get_client_data(CliSock, all);
_ ->
exit(normal)
end;
Len ->
get_client_data(CliSock, list_to_integer(Len))
end,
?Debug("POST data = ~s~n", [binary_to_list(Bin)]),
ARG = make_arg(CliSock, Head, Req, GC, SC),
ARG2 = ARG#arg{clidata = Bin},
handle_request(CliSock, GC, SC, Req, Head, ARG2).
make_arg(CliSock, Head, Req, GC, SC) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
#arg{clisock = CliSock,
h = Head,
req = Req,
docroot = SC#sconf.docroot}.
-record(urltype, {type, %% error | yaws | regular | directory | dotdot
finfo,
path,
fullpath,
data, %% Binary | FileDescriptor | DirListing | undefined
mime, %% MIME type
q %% query for GET requests
}).
handle_request(CliSock, GC, SC, Req, H, ARG) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
UT = url_type(GC, SC,P=get_path(Req#http_request.path)),
case UT#urltype.type of
error ->
deliver_404(CliSock, GC, SC, Req);
directory ->
yaws_ls:list_directory(CliSock, UT#urltype.data, P, GC, SC);
regular ->
deliver_file(CliSock, GC, SC, Req, H, UT);
yaws ->
do_yaws(CliSock, GC, SC, Req, H,
ARG#arg{querydata = UT#urltype.q}, UT);
dotdot ->
deliver_403(CliSock, Req)
end.
deliver_403(CliSock, Req) ->
H = make_date_and_server_headers(),
B = list_to_binary("<html> <h1> 403 Forbidden, no .. paths "
"allowed </h1></html>"),
D = [make_400(403), H, make_connection_close(true),
make_content_length(size(B)), crnl(), B],
safe_send(true, CliSock, D),
done.
deliver_404(CliSock, GC, SC, Req) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
H = make_date_and_server_headers(),
B = not_found_body(get_path(Req#http_request.path), GC, SC),
D = [make_400(404), H, make_connection_close(true),
make_content_length(size(B)), crnl(), B],
safe_send(true, CliSock, D),
done.
do_yaws(CliSock, GC, SC, Req, H, ARG, UT) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
FileAtom = list_to_atom(UT#urltype.fullpath),
Mtime = mtime(UT#urltype.finfo),
case ets:lookup(SC#sconf.ets, FileAtom) of
[{FileAtom, Mtime1, Spec}] when Mtime1 == Mtime ->
deliver_dyn_file(CliSock, GC, SC, Req, H, Spec, ARG,UT);
Other ->
del_old_files(Other),
{ok, Spec} = compile_file(UT#urltype.fullpath, GC, SC),
?Debug("Spec for file ~s is:~n~p~n",[UT#urltype.fullpath, Spec]),
ets:insert(SC#sconf.ets, {FileAtom, Mtime, Spec}),
deliver_dyn_file(CliSock, GC, SC, Req, H, Spec, ARG, UT)
end.
del_old_files([]) ->
ok;
del_old_files([{FileAtom, Mtime1, Spec}]) ->
lists:foreach(
fun({mod, _, _, _, Mod, Func}) ->
F="/tmp/yaws/" ++ yaws:to_list(Mod) ++ ".erl",
file:delete(F);
(_) ->
ok
end, Spec).
get_client_data(CliSock, all) ->
get_client_data(CliSock, all, gen_tcp:recv(CliSock, 4000));
get_client_data(CliSock, Len) ->
case gen_tcp:recv(CliSock, Len) of
{ok, B} when size(B) == Len ->
B;
_ ->
exit(normal)
end.
get_client_data(CliSock, all, {ok, B}) ->
B2 = get_client_data(CliSock, all, gen_tcp:recv(CliSock, 4000)),
<<B/binary, B2/binary>>;
get_client_data(CliSock, all, eof) ->
<<>>.
do_dyn_headers(CliSock, GC, SC, Req, Head, [H|T], ARG) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
{DoClose, Chunked} = case Req#http_request.version of
{1, 0} -> {true, []};
{1, 1} -> {false, make_chunked()}
end,
case H of
{mod, LineNo, YawsFile, SkipChars, Mod, some_headers} ->
MimeType = "text/html",
OutH = make_dyn_headers(DoClose, MimeType),
case (catch apply(Mod, some_headers, [ARG])) of
{ok, Out} ->
{[make_200(),OutH, Chunked, Out, crnl()], T, DoClose};
close ->
exit(normal);
Err ->
{[make_200(), OutH, crnl(),
?F("<p> yaws code ~w:~w(~p) crashed:"
" ~n~p~n",
[Mod, some_headers, [Head], Err])], T, DoClose}
end;
{mod, LineNo, YawsFile, SkipChars, Mod, all_headers} ->
case (catch apply(Mod, all_headers, [ARG])) of
{ok, StatusCode, Out} when integer(StatusCode) ->
put(status_code, StatusCode),
{[Out, crnl()], T, DoClose};
close ->
exit(normal);
Err ->
MimeType = "text/html",
OutH = make_dyn_headers(DoClose, MimeType),
{[make_200(), OutH, crnl(),
?F("<p> yaws code ~w:~w(~p) crashed:"
" ~n~p~n",
[Mod, all_headers, [Head], Err])], T, DoClose}
end;
_ ->
MimeType = "text/html",
OutH = make_dyn_headers(DoClose, MimeType),
{[make_200(),OutH, Chunked, crnl()], [H|T], DoClose}
end.
%% do the header and continue
deliver_dyn_file(CliSock, GC, SC, Req, Head, Specs, ARG, UT) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
Fd = ut_open(UT),
Bin = ut_read(Fd),
{S2, Tail, DoClose} = do_dyn_headers(CliSock,GC, SC,Req,Head,Specs,ARG),
safe_send(true, CliSock, S2),
deliver_dyn_file(CliSock, GC, SC, Req, Head, UT,
DoClose, Bin, Fd, Specs, ARG).
deliver_dyn_file(CliSock, GC, SC, Req, Head, UT, DC, Bin, Fd, [H|T],ARG) ->
?TC([{record, GC, gconf}, {record, SC, sconf}, {record, UT,urltype}]),
?Debug("deliver_dyn_file: ~p~n", [H]),
case H of
{mod, LineNo, YawsFile, NumChars, Mod, out} ->
{_, Bin2} = skip_data(Bin, Fd, NumChars),
safe_call(DC, LineNo, YawsFile, CliSock, Mod, out, [ARG]),
deliver_dyn_file(CliSock, GC, SC, Req, Head, UT, DC,
Bin2,Fd,T,ARG);
{data, NumChars} ->
{Send, Bin2} = skip_data(Bin, Fd, NumChars),
safe_send(DC, CliSock, Send),
deliver_dyn_file(CliSock, GC, SC, Req, Bin2,
UT, DC, Bin2, Fd, T,ARG);
{error, NumChars, Str} ->
{_, Bin2} = skip_data(Bin, Fd, NumChars),
safe_send(DC, CliSock, Str),
deliver_dyn_file(CliSock, GC, SC, Req, Bin2,
UT, DC, Bin2, Fd, T,ARG)
end;
deliver_dyn_file(CliSock, GC, SC, Req, Head, UT, DC, Bin, Fd, [],ARG) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
?Debug("deliver_dyn: done~n", []),
case DC of
true ->
done;
false ->
tcp_send(CliSock, ["0", crnl(), crnl()]),
continue
end.
%% what about trailers ??
skip_data(List, Fd, Sz) when list(List) ->
skip_data(list_to_binary(List), Fd, Sz);
skip_data(Bin, Fd, Sz) when binary(Bin) ->
?Debug("Skip data ~p bytes ", [Sz]),
case Bin of
<<Head:Sz/binary ,Tail/binary>> ->
{Head, Tail};
_ ->
case file:read(Fd, 4000) of
{ok, Bin2} ->
Bin3 = <<Bin/binary, Bin2/binary>>,
skip_data(Bin3, Fd, Sz);
Err ->
?Debug("EXIT in skip_data: ~p ~p~n", [Bin, Sz]),
exit(normal)
end
end;
skip_data({bin, Bin}, _, Sz) ->
<<Head:Sz/binary ,Tail/binary>> = Bin,
{Head, {bin, Tail}}.
to_binary(B) when binary(B) ->
B;
to_binary(L) when list(L) ->
list_to_binary(L).
safe_send(DoClose, Sock, Data) ->
?Debug("safe send ~p bytes ", [size(to_binary([Data]))]),
if
DoClose == true ->
case tcp_send(Sock, Data) of
ok ->
ok;
Err ->
?Debug("fail to send: ~p~n", [Err]),
exit(normal)
end;
DoClose == false ->
B = to_binary(Data),
Len = size(B),
Data2 = [yaws:integer_to_hex(Len) , crnl(), B],
case tcp_send(Sock, Data2) of
ok ->
ok;
Err ->
?Debug("fail to send: ~p~n", [Err]),
exit(normal)
end
end.
safe_call(DoClose, LineNo, YawsFile, CliSock, M, F, A) ->
?Debug("safe_call ~w:~w(~p)~n",
[M, F, ?format_record(hd(A), arg)]),
case (catch apply(M,F,A)) of
{'EXIT', Err} ->
safe_send(DoClose, CliSock,
?F("~n<pre> ~nERROR erl ~w/1 code crashed:~n "
"File: ~s:~w~n"
"Reason: ~p~n</pre>~n",
[F, YawsFile, LineNo, Err])),
yaws:elog("erl code ~w/1 crashed: ~n"
"File: ~s:~w~n"
"Reason: ~p", [F, YawsFile, LineNo, Err]);
{ok, Out} ->
safe_send(DoClose, CliSock, Out);
Other ->
safe_send(DoClose, CliSock,
?F("~n<pre>~nERROR erl code ~w/1 returned bad value: ~n "
"File: ~s:~w~n"
"Value: ~p~n</pre>~n",
[F, YawsFile, LineNo, Other])),
yaws:elog("erl code ~w/1 returned bad value: ~n"
"File: ~s:~w~n"
"Value: ~p", [F, YawsFile, LineNo, Other]);
close ->
gen_tcp:close(CliSock),
exit(normal)
end.
ut_open(UT) ->
case UT#urltype.data of
undefined ->
{ok, Fd} = file:open(UT#urltype.fullpath, [read, raw]),
Fd;
B when binary(B) ->
{bin, B}
end.
ut_read(Bin = {bin, B}) ->
Bin;
ut_read(Fd) ->
file:read(Fd, 4000).
ut_close({bin, _}) ->
ok;
ut_close(Fd) ->
file:close(Fd).
deliver_file(CliSock, GC, SC, Req, InH, UT) ->
?TC([{record, GC, gconf}, {record, SC, sconf}, {record, UT, urltype}]),
DoClose = do_close(Req, InH),
OutH = make_static_headers(Req, UT, DoClose),
Fd = ut_open(UT),
Bin = ut_read(Fd),
case Bin of
{bin, Binary} ->
tcp_send(CliSock, [make_200(), OutH, crnl(), Binary]);
{ok, Binary} ->
send_loop(CliSock, [make_200(), OutH, crnl(), Binary], Fd)
end,
ut_close(Fd),
if
DoClose == true ->
done;
DoClose == false ->
continue
end.
do_close(Req, H) ->
case Req#http_request.version of
{1, 0} ->
case H#headers.keep_alive of
undefined ->
true;
_ ->
false
end;
_ ->
false
end.
send_loop(CliSock, Data, Fd) ->
case tcp_send(CliSock, Data) of
ok ->
case ut_read(Fd) of
{ok, Data2} ->
send_loop(CliSock, Data2, Fd);
eof ->
ok
end;
Err ->
Err
end.
make_dyn_headers(DoClose, MimeType) ->
[make_date_header(),
make_server_header(),
make_content_type(MimeType),
make_connection_close(DoClose),
make_non_cache_able()
].
make_non_cache_able() ->
[]. %% FIXME
make_date_and_server_headers() ->
[make_date_header(),
make_server_header()
].
make_static_headers(Req, UT, DoClose) ->
[make_date_and_server_headers(),
make_last_modified(UT#urltype.finfo),
make_etag(UT#urltype.finfo),
make_accept_ranges(),
make_content_length(UT#urltype.finfo),
make_content_type(UT#urltype.mime),
make_connection_close(DoClose)
].
make_200() ->
put(status_code, 200),
"HTTP/1.1 200 OK\r\n".
make_400(Code) ->
put(status_code, Code),
["HTTP/1.1 ", integer_to_list(Code), " ",
yaws_api:code_to_phrase(Code), crnl()].
crnl() ->
"\r\n".
%% FIXME optimize the goddamn date generations
make_date_header() ->
N = element(2, now()),
case get(date_header) of
{Str, Secs} when (Secs+10) > N ->
H = ["Date: ", yaws:universal_time_as_string(), crnl()],
put(date_header, {H, N}),
H;
{Str, Secs} ->
Str;
undefined ->
H = ["Date: ", yaws:universal_time_as_string(), crnl()],
put(date_header, {H, N}),
H
end.
make_server_header() ->
["Server: Yaws/0.1 Yet Another Web Server", crnl()].
make_last_modified(_) ->
[];
make_last_modified(FI) ->
N = element(2, now()),
Inode = FI#file_info.inode, %% unix only
case get({last_modified, Inode}) of
{Str, Secs} when N < (Secs+10) ->
Str;
_ ->
S = do_make_last_modified(FI),
put({last_modified, Inode}, {S, N}),
S
end.
do_make_last_modified(FI) ->
Then = FI#file_info.mtime,
UTC = calendar:now_to_universal_time(Then),
Local = calendar:universal_time_to_local_time(UTC),
Str = yaws:date_and_time(Local, UTC),
["Last-Modified: ", yaws:date_and_time_to_string(Str), crnl()].
make_etag(File) ->
[].
make_accept_ranges() ->
"Accept-Ranges: bytes\r\n".
make_content_length(Size) when integer(Size) ->
put(content_length, Size),
["Content-Length: ", integer_to_list(Size), crnl()];
make_content_length(FI) ->
Size = FI#file_info.size,
put(content_length, Size),
["Content-Length: ", integer_to_list(Size), crnl()].
make_content_type(MimeType) ->
["Content-Type: ", MimeType, crnl()].
make_connection_close(true) ->
"Connection: close\r\n";
make_connection_close(false) ->
[].
make_chunked() ->
["Transfer-Encoding: chunked", crnl()].
%% a file cache,
url_type(GC, SC, Path) ->
?TC([{record, GC, gconf}, {record, SC, sconf}]),
E = SC#sconf.ets,
update_total(E, Path),
case ets:lookup(E, {url, Path}) of
[] ->
UT = do_url_type(SC#sconf.docroot, Path),
?TC([{record, UT, urltype}]),
cache_file(GC, SC, Path, UT);
[{_, When, UT}] ->
N = now(),
FI = UT#urltype.finfo,
if
When + 30 > N ->
%% more than 30 secs old entry
ets:delete(E, {url, Path}),
ets:delete(E, {urlc, Path}),
ets:update_counter(E, num_files, -1),
ets:update_counter(E, num_bytes, -FI#file_info.size),
url_type(GC, SC, Path);
true ->
ets:update_counter(E, {urlc, Path}, 1),
UT
end
end.
update_total(E, Path) ->
case (catch ets:update_counter(E, {urlc_total, Path}, 1)) of
{'EXIT', _} ->
ets:insert(E, {{urlc_total, Path}, 1});
_ ->
ok
end.
cache_file(GC, SC, Path, UT) when UT#urltype.type == regular ;
UT#urltype.type == yaws ->
E = SC#sconf.ets,
[{num_files, N}] = ets:lookup(E, num_files),
[{num_bytes, B}] = ets:lookup(E, num_bytes),
FI = UT#urltype.finfo,
if
N + 1 > GC#gconf.max_num_cached_files ->
error_logger:info("Max NUM cached files reached for server "
"~p", [SC#sconf.servername]),
cleanup_cache(E, num),
cache_file(GC, SC, Path, UT);
B + FI#file_info.size > GC#gconf.max_num_cached_bytes ->
error_logger:info("Max size cached bytes reached for server "
"~p", [SC#sconf.servername]),
cleanup_cache(E, size),
cache_file(GC, SC, Path, UT);
true ->
if
FI#file_info.size > GC#gconf.max_size_cached_file ->
UT;
true ->
{ok, Bin} = file:read_file(UT#urltype.fullpath),
UT2 = UT#urltype{data = Bin},
ets:insert(E, {{url, Path}, now(), UT2}),
ets:insert(E, {{urlc, Path}, 1}),
ets:update_counter(E, num_files, 1),
ets:update_counter(E, num_bytes, FI#file_info.size),
UT2
end
end;
cache_file(GC, SC, Path, UT) ->
UT.
cleanup_cache(E, size) ->
%% remove the largest files with the least hit count (urlc)
uhhh;
cleanup_cache(E, num) ->
%% remove all files with a low hit count
uhhh.
%% return #urltype{}
do_url_type(Droot, Path) ->
case split_path(Droot, Path, [], []) of
slash ->
case file:read_file_info([Droot, Path, "/index.yaws"]) of
{ok, FI} ->
#urltype{type = yaws,
finfo = FI,
mime = "text/html",
fullpath = ?f([Droot, Path,"/index.yaws"])};
_ ->
case file:read_file_info([Droot, Path, "/index.html"]) of
{ok, FI} ->
#urltype{type = regular,
finfo = FI,
mime = "text/html",
fullpath =?f([Droot,Path,"/index.html"])};
_ ->
case file:list_dir([Droot, Path]) of