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adilbaig/mod_warm_bindings.erl with info_msg

Created June 7, 2010 14:59
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mod_warm_bindings.erl with info_msg
%%%------------------------------------------------------------------------
%%% File : mod_warm_bindings.erl
%%% Author : Theo Cushion <theo@jivatechnology.com>
%%% Purpose : Enables the creation of authenticated BOSH sessions via HTTP
%%% Created : 29/01/2010
%%%------------------------------------------------------------------------
-module(mod_warm_bindings).
-author('theo@jivatechnology.com').
-behaviour(gen_mod).
-export([
start/2,
stop/1,
process/2
]).
-import(web_utils,[param_decode/1]).
-include("ejabberd.hrl").
-include("jlib.hrl").
-include("ejabberd_http.hrl").
-record(binding, {jid, sid, rid}).
%%%----------------------------------------------------------------------
%%% REQUEST HANDLERS
%%%----------------------------------------------------------------------
process([], #request{auth = Auth, ip = IP, method = 'POST', data = Data}) ->
case auth_admin(Auth) of
success ->
?INFO_MSG("Params ~p",[Data]),
{value,{_,SJID}} = lists:keysearch(jid, 1, param_decode(Data)),
{value,{_,Pass}} = lists:keysearch(password, 1, param_decode(Data)),
?INFO_MSG("SJID,is_list(SJID),Pass,is_list(Pass),IP",[SJID,is_list(SJID),Pass,is_list(Pass),IP]),
case is_list(SJID) andalso is_list(Pass) of
true ->
case bind(SJID, Pass, IP) of
false -> badrequest();
Binding -> success(Binding)
end;
false -> badrequest()
end;
forbidden -> forbidden();
unauthorized -> unauthorized()
end;
process([], #request{auth = Auth, method = 'GET', path = FullPath}) ->
case auth_admin(Auth) of
success -> form(FullPath);
forbidden -> forbidden();
unauthorized -> unauthorized()
end;
process(Path, Request) ->
?DEBUG("Bad Request ~p to ~p", [Request, Path]),
badrequest().
%%%----------------------------------------------------------------------
%%% LOGIN HELPERS
%%%----------------------------------------------------------------------
%%% Checks that a user is an admin
auth_admin(Auth) ->
case Auth of
{SJID, P} ->
% Check jid is valid
case jlib:string_to_jid(SJID) of
JID = #jid{user = U, server = S} ->
% Check password is correct
case ejabberd_auth:check_password(U, S, P) of
true ->
% Check user is an admin
case acl:match_acl(admin,JID,S) of
true ->
?INFO_MSG("Authorized ~p",[U]),
success;
false ->
?INFO_MSG("Forbidden ~p",[U]),
forbidden
end;
false ->
?INFO_MSG("Unauthorized ~p",[U]),
unauthorized
end;
error ->
?INFO_MSG("Unauthorized ~p",[SJID]),
unauthorized
end;
_ ->
?INFO_MSG("Unauthorized",[]),
unauthorized
end.
bind(SJID, Password, IP) ->
#jid{user = User, server = Server, resource = Resource} = jlib:string_to_jid(SJID),
?INFO_MSG("Function : bind/3 SJID, Password, IP, User, Server, Resource",[SJID, Password, IP, User,Server,Resource]),
RidSessionCreate = list_to_integer(randoms:get_string()),
RidAuth = RidSessionCreate + 1,
RidSessionRestart = RidAuth + 1,
RidResourceBind = RidSessionRestart + 1,
RidSessionRequest = RidResourceBind + 1,
RidNext = RidSessionRequest + 1,
{xmlelement, "body", Attrs1, _ } = process_request("<body rid='"++integer_to_list(RidSessionCreate)++"' xmlns='http://jabber.org/protocol/httpbind' to='"++Server++"' xml:lang='en' wait='60' hold='1' window='5' content='text/xml; charset=utf-8' ver='1.6' xmpp:version='1.0' xmlns:xmpp='urn:xmpp:xbosh'/>", IP),
{value, {_, Sid}} = lists:keysearch("sid", 1, Attrs1),
{value, {_, AuthID}} = lists:keysearch("authid", 1, Attrs1),
Auth = base64:encode_to_string(AuthID++[0]++User++[0]++Password),
case process_request("<body rid='"++integer_to_list(RidAuth)++"' xmlns='http://jabber.org/protocol/httpbind' sid='"++Sid++"'><auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>"++Auth++"</auth></body>", IP) of
{xmlelement,"body",_,[{xmlelement,"success",_,_}]} ->
process_request("<body rid='"++integer_to_list(RidSessionRestart)++"' xmlns='http://jabber.org/protocol/httpbind' sid='"++Sid++"' to='"++Server++"' xml:lang='en' xmpp:restart='true' xmlns:xmpp='urn:xmpp:xbosh'/>", IP),
case Resource of
[] ->
{_,_,_,[{_,_,_,[{_,_,_,[{_,_,_,[{_,JID}]}]}]}]} = process_request("<body rid='"++integer_to_list(RidResourceBind)++"' xmlns='http://jabber.org/protocol/httpbind' sid='"++Sid++"'><iq type='set'><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/></iq></body>", IP);
_ ->
{_,_,_,[{_,_,_,[{_,_,_,[{_,_,_,[{_,JID}]}]}]}]} = process_request("<body rid='"++integer_to_list(RidResourceBind)++"' xmlns='http://jabber.org/protocol/httpbind' sid='"++Sid++"'><iq type='set'><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><resource>"++Resource++"</resource></bind></iq></body>", IP)
end,
process_request("<body rid='"++integer_to_list(RidSessionRequest)++"' xmlns='http://jabber.org/protocol/httpbind' sid='"++Sid++"'><iq type='set'><session xmlns='urn:ietf:params:xml:ns:xmpp-session'/></iq></body>", IP),
#binding{jid = binary_to_list(JID), sid = Sid, rid = integer_to_list(RidNext)};
_ ->
?DEBUG("User binding credentials wrong", []),
false
end.
process_request(Request, IP) ->
{_, _, Response} = ejabberd_http_bind:process_request(Request, IP),
xml_stream:parse_element(lists:flatten(Response)).
%%%----------------------------------------------------------------------
%%% VIEWS
%%%----------------------------------------------------------------------
form(Path) ->
{200,[],
{xmlelement, "html", [{"xmlns", "http://www.w3.org/1999/xhtml"}, {"xml:lang", "en"}],[
{xmlelement, "head", [], [
{xmlelement, "title", [], [
{xmlcdata, "Warm Binding"}
]}
]},
{xmlelement, "body", [], [
{xmlelement, "form", [{"action","/"++filename:join(Path)},{"method","post"}], [
{xmlelement, "fieldset",[],[
{xmlelement, "legend",[],[{xmlcdata, "Warm Binding"}]},
{xmlelement, "ol",[],[
{xmlelement, "li",[],[
{xmlelement, "label", [{"for","jid"}], [{xmlcdata, "JID"}]},
{xmlelement, "input", [{"type","text"},{"name","jid"}], []}
]},
{xmlelement, "li",[],[
{xmlelement, "label", [{"for", "password"}], [{xmlcdata, "Password"}]},
{xmlelement, "input", [{"type","password"},{"name","password"}], []}
]}
]}
]},
{xmlelement, "input", [{"type","submit"},{"value","Bind"}], []}
]}
]}
]}
}.
success(Binding) ->
{200,[],
{xmlelement, "html", [{"xmlns", "http://www.w3.org/1999/xhtml"}, {"xml:lang", "en"}],[
{xmlelement, "head", [], [
{xmlelement, "title", [], [
{xmlcdata, "Success"}
]}
]},
{xmlelement, "body", [], [
{xmlelement, "p", [], [
{xmlcdata, "Success"}
]},
{xmlelement, "dl", [{"class","binding"}], [
{xmlelement, "dt", [{"class","jid"}], [{xmlcdata, "JID"}]},
{xmlelement, "dd", [{"class","jid"}], [{xmlcdata, Binding#binding.jid}]},
{xmlelement, "dt", [{"class","sid"}], [{xmlcdata, "SID"}]},
{xmlelement, "dd", [{"class","sid"}], [{xmlcdata, Binding#binding.sid}]},
{xmlelement, "dt", [{"class","rid"}], [{xmlcdata, "RID"}]},
{xmlelement, "dd", [{"class","rid"}], [{xmlcdata, Binding#binding.rid}]}
]}
]}
]}
}.
forbidden() ->
{403,[],
{xmlelement, "html", [{"xmlns", "http://www.w3.org/1999/xhtml"}, {"xml:lang", "en"}],[
{xmlelement, "head", [], [
{xmlelement, "title", [], [
{xmlcdata, "Forbidden"}
]}
]},
{xmlelement, "body", [], [
{xmlelement, "p", [], [
{xmlcdata, "Forbidden"}
]}
]}
]}
}.
unauthorized() ->
{401,[{"WWW-Authenticate", "basic realm='HTTP Binding Warm'"}],
{xmlelement, "html", [{"xmlns", "http://www.w3.org/1999/xhtml"}, {"xml:lang", "en"}],[
{xmlelement, "head", [], [
{xmlelement, "title", [], [
{xmlcdata, "Unauthorized"}
]}
]},
{xmlelement, "body", [], [
{xmlelement, "p", [], [
{xmlcdata, "Unauthorized"}
]}
]}
]}
}.
badrequest() ->
{400,[],
{xmlelement, "html", [{"xmlns", "http://www.w3.org/1999/xhtml"}, {"xml:lang", "en"}],[
{xmlelement, "head", [], [
{xmlelement, "title", [], [
{xmlcdata, "Bad Request"}
]}
]},
{xmlelement, "body", [], [
{xmlelement, "p", [], [
{xmlcdata, "Bad Request"}
]}
]}
]}
}.
%%%----------------------------------------------------------------------
%%% BEHAVIOUR CALLBACKS
%%%----------------------------------------------------------------------
start(_Host, _Opts) ->
ok.
stop(_Host) ->
ok.
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