actions/login.php

   1 <?php
   2 /*
   3  * Laconica - a distributed open-source microblogging tool
   4  * Copyright (C) 2008, Controlez-Vous, Inc.
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU Affero General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 if (!defined('LACONICA')) { exit(1); }
  21
  22 class LoginAction extends Action {
  23
  24         function handle($args) {
  25                 parent::handle($args);
  26                 if (common_logged_in()) {
  27                         common_user_error(_t('Already logged in.'));
  28                 } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
  29                         $this->check_login();
  30                 } else {
  31                         $this->show_form();
  32                 }
  33         }
  34
  35         function check_login() {
  36                 # XXX: form token in $_SESSION to prevent XSS
  37                 # XXX: login throttle
  38                 $nickname = $this->arg('nickname');
  39                 $password = $this->arg('password');
  40                 if (common_check_user($nickname, $password)) {
  41                         # success!
  42                         if (!common_set_user($nickname)) {
  43                                 common_server_error(_t('Error setting user.'));
  44                                 return;
  45                         }
  46                         # success!
  47                         $url = common_get_returnto();
  48                         if ($url) {
  49                                 # We don't have to return to it again
  50                                 common_set_returnto(NULL);
  51                         } else {
  52                                 $url = common_local_url('all',
  53                                                                                 array('nickname' =>
  54                                                                                           $nickname));
  55                         }
  56                         common_redirect($url);
  57                 } else {
  58                         $this->show_form(_t('Incorrect username or password.'));
  59                 }
  60         }
  61
  62         function show_form($error=NULL) {
  63
  64                 common_show_header(_t('Login'));
  65                 if (!is_null($error)) {
  66                         common_element('div', array('class' => 'error'), $msg);
  67                 }
  68                 common_element_start('form', array('method' => 'POST',
  69                                                                                    'id' => 'login',
  70                                                                                    'action' => common_local_url('login')));
  71                 common_input('nickname', _t('Nickname'));
  72                 common_password('password', _t('Password'));
  73                 common_submit('submit', _t('Login'));
  74                 common_element_end('form');
  75                 common_show_footer();
  76         }
  77 }