[erlang-questions] Yaws user login

Thu Jun 7 12:00:42 CEST 2007

Hi i have a problem that i still can't understand :)

Can someone decipher this for me(LOL) :

Internal error, yaws code crashed

ERROR erlang  code  crashed:
 File: /var/www/yaws-default/login.yaws:9
Reason: {{badmatch,false},
         [{m26,kv,2},
          {m26,out,1},
          {yaws_server,deliver_dyn_part,8},
          {yaws_server,aloop,3},
          {yaws_server,acceptor0,2},
          {proc_lib,init_p,5}]}
Req: {http_request,'GET',{abs_path,"/login.yaws"},{1,1}}

The login.yaws code is following:

<html>
<erl>

-export([out/1]).

-record(login,
	{username,
	password}).

formular(A, Feedback) ->
    {ehtml,
     [{form,
       [{enctype, "multipart/form-data"}, {action, "login.yaws"},
{method, "post"}],
       [{p, [], "Upisi korisnicko ime i sifru."},
	{p, [], {input,[{type,"text"},{name,"username"}],[]}},
	{p, [], {input,[{type,"password"}, {name,"password"}], []}},
	{p, [], {input,[{type,"submit"}, {value, "Log in"}], []}}
	]}]}.

-include("../usr/lib/yaws/myapp.hrl").

kv(K,L) ->
    {value, {K, V}} = lists:keysearch(K,1,L),
    V.

out(A) ->
    L = yaws_api:parse_post(A),
    User = kv(username, L),
    Pwd = kv(password, L),
    case myapp:auth(User, Pwd) of
	ok ->
	    S = #session{username = User,
			 password = Pwd,
			 udata = []},

	    Cookie = yaws_api:new_cookie_session(S),
	    [{redirect_local, kv(url, L)},
	     yaws_api:setcookie("myapp_sid", Cookie)];

    Err ->
	   {ehtml,
	    {html, [],
	     {p, [], f("Bad login: ~p",[Err])}}}
	   end.

</erl>
</html>

and the myapp.hrl code is:

-record(session, {username,
		password,
		udata = []}).

get_cookie_val(CookieName, Arg) ->
	H = Arg#arg.headers,
	yaws_api:find_cookie_val(CookieName, H#headers.cookie).

check_cookie(A, CookieName) ->
	case get_cookie_val(CookieName, A) of
		[] ->
			{error, "nije ulogiran"};
		Cookie ->
			yaws_api:cookieval_to_opaque(Cookie)
		end.

Where am i going wrong?

Thanks,
Patrick