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%% ``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
%% compliance with the License. You should have received a copy of the
%% Erlang Public License along with this software. If not, it can be
%% retrieved via the world wide web at http://www.erlang.org/.
%%
%% Software distributed under the License is distributed on an "AS IS"
%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
%% under the License.
%%
%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
%% AB. All Rights Reserved.''
%%
%% $Id$
%%
%%----------------------------------------------------------------------
%% Purpose: The top supervisor for the http server (httpd) hangs under
%% inets_sup.
%%----------------------------------------------------------------------
-module(httpd_sup).
-behaviour(supervisor).
%% API
-export([start_link/1]).
-export([start_child/1, stop_child/2]).
%% Supervisor callback
-export([init/1]).
%%%=========================================================================
%%% API
%%%=========================================================================
start_link(HttpdServices) ->
supervisor:start_link({local, ?MODULE}, ?MODULE, [HttpdServices]).
start_child(ConfigFile) ->
{ok, Spec} = httpd_child_spec(ConfigFile, 15000, []),
supervisor:start_child(?MODULE, Spec).
stop_child(Addr, Port) ->
Name = {httpd_instance_sup, Addr, Port},
case supervisor:terminate_child(?MODULE, Name) of
ok ->
supervisor:delete_child(?MODULE, Name);
Error ->
Error
end.
%%%=========================================================================
%%% Supervisor callback
%%%=========================================================================
init([HttpdServices]) ->
RestartStrategy = one_for_one,
MaxR = 10,
MaxT = 3600,
Children = child_spec(HttpdServices, []),
{ok, {{RestartStrategy, MaxR, MaxT}, Children}}.
%%%=========================================================================
%%% Internal functions
%%%=========================================================================
%% The format of the httpd service is:
%% httpd_service() -> {httpd,httpd()}
%% httpd() -> [httpd_config()] | file()
%% httpd_config() -> {file,file()} |
%% {debug,debug()} |
%% {accept_timeout,integer()}
%% debug() -> disable | [debug_options()]
%% debug_options() -> {all_functions,modules()} |
%% {exported_functions,modules()} |
%% {disable,modules()}
%% modules() -> [atom()]
child_spec([], Acc) ->
Acc;
child_spec([{httpd, HttpdService} | Rest], Acc) ->
NewHttpdService = mk_tuple_list(HttpdService),
%% Acc2 = child_spec2(NewHttpdService,Acc),
NewAcc=
case catch child_spec2(NewHttpdService) of
{ok,Acc2} ->
[Acc2|Acc];
{error,Reason} ->
error_msg("failed to create child spec for ~n~p~ndue to: ~p",
[HttpdService,Reason]),
% exit({error,Reason})
Acc
end,
child_spec(Rest,NewAcc).
child_spec2(HttpdService) ->
Debug = http_util:key1search(HttpdService,debug,[]),
AcceptTimeout = http_util:key1search(HttpdService,accept_timeout,15000),
ConfigFile =
case http_util:key1search(HttpdService,file) of
undefined -> throw({error,{mandatory_conf_file_missed}});
File -> File
end,
httpd_util:valid_options(Debug,AcceptTimeout,ConfigFile),
httpd_child_spec(ConfigFile,AcceptTimeout,Debug).
httpd_child_spec(ConfigFile,AcceptTimeout,Debug) ->
case httpd_conf:load(ConfigFile) of
{ok, ConfigList} ->
Port = httpd_util:key1search(ConfigList, port, 80),
Addr = httpd_util:key1search(ConfigList, bind_address),
{ok, httpd_child_spec(ConfigFile, AcceptTimeout,
Debug, Addr, Port)};
Error ->
Error
end.
httpd_child_spec(ConfigFile, AcceptTimeout, Debug, Addr, Port) ->
Name = {httpd_instance_sup, Addr, Port},
StartFunc = {httpd_instance_sup, start_link,
[ConfigFile,AcceptTimeout,Debug]},
Restart = permanent,
Shutdown = infinity,
Modules = [httpd_instance_sup],
Type = supervisor,
{Name, StartFunc, Restart, Shutdown, Type, Modules}.
mk_tuple_list([]) ->
[];
mk_tuple_list([H={_,_}|T]) ->
[H|mk_tuple_list(T)];
mk_tuple_list(F) ->
[{file,F}].
error_msg(F, A) ->
error_logger:error_msg(F ++ "~n", A).
|
