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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.''
%%
%% $Id$
%%
-module(httpd_acceptor).
-include("httpd.hrl").
%% External API
-export([start_link/5, start_link/6]).
%% Other exports (for spawn's etc.)
-export([acceptor/5, acceptor/6, acceptor/7]).
%%
%% External API
%%
%% start_link
start_link(Manager, SocketType, Addr, Port, ConfigDb) ->
start_link(Manager, SocketType, Addr, Port, ConfigDb, 15000).
start_link(Manager, SocketType, Addr, Port, ConfigDb,AcceptTimeout) ->
Args = [self(), Manager, SocketType, Addr, Port, ConfigDb, AcceptTimeout],
proc_lib:start_link(?MODULE, acceptor, Args).
acceptor(Parent, Manager, SocketType, Addr, Port, ConfigDb) ->
acceptor(Parent, Manager, SocketType, Addr, Port, ConfigDb, 15000).
acceptor(Parent, Manager, SocketType, Addr, Port, ConfigDb, AcceptTimeout) ->
case (catch do_init(SocketType, Addr, Port)) of
{ok, ListenSocket} ->
proc_lib:init_ack(Parent, {ok, self()}),
acceptor(Manager, SocketType, ListenSocket, ConfigDb, AcceptTimeout);
Error ->
proc_lib:init_ack(Parent, Error),
error
end.
do_init(SocketType, Addr, Port) ->
do_socket_start(SocketType),
ListenSocket = do_socket_listen(SocketType, Addr, Port),
{ok, ListenSocket}.
do_socket_start(SocketType) ->
case http_transport:start(SocketType) of
ok ->
ok;
{error, Reason} ->
throw({error, {socket_start_failed, Reason}})
end.
do_socket_listen(SocketType, Addr, Port) ->
case http_transport:listen(SocketType, Addr, Port) of
{ok, ListenSocket} ->
ListenSocket;
{error, Reason} ->
throw({error, {listen, Reason}})
end.
%% acceptor
acceptor(Manager, SocketType, ListenSocket, ConfigDb, AcceptTimeout) ->
case (catch http_transport:accept(SocketType, ListenSocket, 50000)) of
{ok, Socket} ->
handle_connection(Manager, ConfigDb, AcceptTimeout, SocketType, Socket),
?MODULE:acceptor(Manager, SocketType, ListenSocket, ConfigDb,AcceptTimeout);
{error, Reason} ->
handle_error(Reason, ConfigDb, SocketType),
?MODULE:acceptor(Manager, SocketType, ListenSocket, ConfigDb, AcceptTimeout);
{'EXIT', Reason} ->
handle_error({'EXIT', Reason}, ConfigDb, SocketType),
?MODULE:acceptor(Manager, SocketType, ListenSocket, ConfigDb, AcceptTimeout)
end.
handle_connection(Manager, ConfigDb, AcceptTimeout, SocketType, Socket) ->
{ok, Pid} = httpd_request_handler:start(Manager, ConfigDb, AcceptTimeout),
http_transport:controlling_process(SocketType, Socket, Pid),
httpd_request_handler:socket_ownership_transfered(Pid, SocketType, Socket).
handle_error(timeout, _, _) ->
ok;
handle_error({enfile, _}, _, _) ->
%% Out of sockets...
sleep(200);
handle_error(emfile, _, _) ->
%% Too many open files -> Out of sockets...
sleep(200);
handle_error(closed, _, _) ->
error_logger:info_report("The httpd accept socket was closed by"
"a third party. "
"This will not have an impact on inets "
"that will open a new accept socket and "
"go on as nothing happened. It does however "
"indicate that some other software is behaving "
"badly."),
exit(normal);
%% This will only happen when the client is terminated abnormaly
%% and is not a problem for the server, so we want
%% to terminate normal so that we can restart without any
%% error messages.
handle_error(econnreset,_,_) ->
exit(normal);
handle_error(econnaborted, _, _) ->
ok;
handle_error(esslaccept, _, _) ->
%% The user has selected to cancel the installation of
%% the certifikate, This is not a real error, so we do
%% not write an error message.
ok;
handle_error({'EXIT', Reason}, ConfigDb, SocketType) ->
String = lists:flatten(io_lib:format("Accept exit: ~p", [Reason])),
accept_failed(SocketType, ConfigDb, String);
handle_error(Reason, ConfigDb, SocketType) ->
String = lists:flatten(io_lib:format("Accept error: ~p", [Reason])),
accept_failed(SocketType, ConfigDb, String).
accept_failed(SocketType, ConfigDb, String) ->
error_logger:error_report(String),
mod_log:error_log(SocketType, undefined, ConfigDb,
{0, "unknown"}, String),
mod_disk_log:error_log(SocketType, undefined, ConfigDb,
{0, "unknown"}, String),
exit({accept_failed, String}).
sleep(T) -> receive after T -> ok end.
|
