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_is_real_login()) {
  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                 $user = common_check_user($nickname, $password);
  41
  42                 if (!$user) {
  43                         $this->show_form(_t('Incorrect username or password.'));
  44                         return;
  45                 }
  46
  47                 # success!
  48                 if (!common_set_user($user)) {
  49                         common_server_error(_t('Error setting user.'));
  50                         return;
  51                 }
  52
  53                 common_real_login(true);
  54
  55                 if ($this->boolean('rememberme')) {
  56                         common_debug('Adding rememberme cookie for ' . $nickname);
  57                         common_rememberme($user);
  58                 }
  59                 # success!
  60                 $url = common_get_returnto();
  61                 if ($url) {
  62                         # We don't have to return to it again
  63                         common_set_returnto(NULL);
  64                 } else {
  65                         $url = common_local_url('all',
  66                                                                         array('nickname' =>
  67                                                                                   $nickname));
  68                 }
  69                 common_redirect($url);
  70         }
  71
  72         function show_form($error=NULL) {
  73                 common_show_header(_t('Login'), NULL, $error, array($this, 'show_top'));
  74                 common_element_start('form', array('method' => 'post',
  75                                                                                    'id' => 'login',
  76                                                                                    'action' => common_local_url('login')));
  77                 common_input('nickname', _t('Nickname'));
  78                 common_password('password', _t('Password'));
  79                 common_checkbox('rememberme', _t('Remember me'), false,
  80                                 _t('Automatically login in the future; ' .
  81                                    'not for shared computers!'));
  82                 common_submit('submit', _t('Login'));
  83                 common_element_end('form');
  84                 common_element_start('p');
  85                 common_element('a', array('href' => common_local_url('recoverpassword')),
  86                                            _t('Lost or forgotten password?'));
  87                 common_element_end('p');
  88                 common_show_footer();
  89         }
  90
  91         function get_instructions() {
  92                 if (common_logged_in() &&
  93                         !common_is_real_login() &&
  94                         common_get_returnto())
  95                 {
  96                         # rememberme logins have to reauthenticate before
  97                         # changing any profile settings (cookie-stealing protection)
  98                         return _t('For security reasons, ' .
  99                                           'please re-enter your ' .
 100                                           'user name and password ' .
 101                                           'before changing your settings. ');
 102                 } else {
 103                         return _t('Login with your username and password. ' .
 104                                           'Don\'t have a username yet? ' .
 105                                           '[Register](%%action.register%%) a new account, or ' .
 106                                           'try [OpenID](%%action.openidlogin%%). ');
 107                 }
 108         }
 109
 110         function show_top($error=NULL) {
 111                 if ($error) {
 112                         common_element('p', 'error', $error);
 113                 } else {
 114                         $instr = $this->get_instructions();
 115                         $output = common_markup_to_html($instr);
 116                         common_element_start('div', 'instructions');
 117                         common_raw($output);
 118                         common_element_end('div');
 119                 }
 120         }
 121 }
 122 #