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% ==========================================================================================================
% MISULTIN - Sessions Example.
%
% >-|-|-(°>
%
% Copyright (C) 2011, Roberto Ostinelli <roberto@ostinelli.net>
% All rights reserved.
%
% BSD License
%
% Redistribution and use in source and binary forms, with or without modification, are permitted provided
% that the following conditions are met:
%
% * Redistributions of source code must retain the above copyright notice, this list of conditions and the
% following disclaimer.
% * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
% the following disclaimer in the documentation and/or other materials provided with the distribution.
% * Neither the name of the authors nor the names of its contributors may be used to endorse or promote
% products derived from this software without specific prior written permission.
%
% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
% WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
% PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
% ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
% TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
% HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
% NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
% POSSIBILITY OF SUCH DAMAGE.
% ==========================================================================================================
-module(misultin_sessions_example).
-export([start/1, stop/0]).

% start misultin http server
start(Port) ->
misultin:start_link([{port, Port}, {sessions_expire, 60}, {loop, fun(Req) -> handle_http(Req) end}]).

% stop misultin
stop() ->
misultin:stop().

% callback on request received
handle_http(Req) ->
% get session info
{SessionId, SessionState} = Req:session(),
% check state
Count = case SessionState of
[] ->
% no state set previously, init counter
1;
N ->
% increment counter
N + 1
end,
% save counter as session's state. a more complex state can easily be saved here, such as proplist()
Req:save_session_state(SessionId, Count),
% reply
Req:ok([], "Session Id is: ~p, counter is: ~p", [SessionId, Count]).
Something went wrong with that request. Please try again.