Verificador de Website ad hoc

url='http://sistemasenem2.inep.gov.br/resultadosenem/';

x=urlread(url);
count=0;
dlgflag=0;
stime=now;
fprintf('Hora de Início: %s\n',datestr(rem(now,1),'HH:MM:SS'));

while(true)
        prev=x;
        [x,status]=urlread(url);

        if status
                if ~strcmp(x,prev)
                        fprintf(2,'Modificação detectada! %u, %s, %s\n',count,datestr(rem(now-stime,1),'HH:MM:SS'), datestr(rem(now,1),'HH:MM:SS'));
                        if ~dlgrflag
                                warndlg(['Modificação no website detectada! Hora:' datestr(rem(now,1),' HH:MM:SS')]);
                                web(url,'-browser')
                        end
                        count=count+1;
                        dlgrflag=1;
                else
                        fprintf('Sem modificação... %u, %s\n',count,datestr(rem(now-stime,1),'HH:MM:SS'));
                        count=count+1;
                        dlgeflag=0;
            dlgrflag=0;
                end
        else
                fprintf(2,'Um erro ocorreu! %u, %s, %s\n',count,datestr(rem(now-stime,1),'HH:MM:SS'), datestr(rem(now,1),'HH:MM:SS'));
                if ~dlgeflag
                        errordlg(['Um erro ocorreu! Hora:' datestr(rem(now,1),' HH:MM:SS')])
                end
                dlgeflag=1;
                count=count+1;
                x=prev;
        end
        pause(15);
end