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(_('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(_('Error setting user.'));
  44                                 return;
  45                         }
  46                         common_real_login(true);
  47                         if ($this->boolean('rememberme')) {
  48                                 common_debug('Adding rememberme cookie for ' . $nickname);
  49                                 common_rememberme();
  50                         }
  51                         # success!
  52                         $url = common_get_returnto();
  53                         if ($url) {
  54                                 # We don't have to return to it again
  55                                 common_set_returnto(NULL);
  56                         } else {
  57                                 $url = common_local_url('all',
  58                                                                                 array('nickname' =>
  59                                                                                           $nickname));
  60                         }
  61                         common_redirect($url);
  62                 } else {
  63                         $this->show_form(_('Incorrect username or password.'));
  64                         return;
  65                 }
  66
  67                 # success!
  68                 if (!common_set_user($user)) {
  69                         common_server_error(_('Error setting user.'));
  70                         return;
  71                 }
  72
  73                 common_real_login(true);
  74
  75                 if ($this->boolean('rememberme')) {
  76                         common_debug('Adding rememberme cookie for ' . $nickname);
  77                         common_rememberme($user);
  78                 }
  79                 # success!
  80                 $url = common_get_returnto();
  81                 if ($url) {
  82                         # We don't have to return to it again
  83                         common_set_returnto(NULL);
  84                 } else {
  85                         $url = common_local_url('all',
  86                                                                         array('nickname' =>
  87                                                                                   $nickname));
  88                 }
  89                 common_redirect($url);
  90         }
  91
  92         function show_form($error=NULL) {
  93                 common_show_header(_('Login'), NULL, $error, array($this, 'show_top'));
  94                 common_element_start('form', array('method' => 'post',
  95                                                                                    'id' => 'login',
  96                                                                                    'action' => common_local_url('login')));
  97                 common_input('nickname', _('Nickname'));
  98                 common_password('password', _('Password'));
  99                 common_checkbox('rememberme', _('Remember me'), false,
 100                                 _('Automatically login in the future; ' .
 101                                    'not for shared computers!'));
 102                 common_submit('submit', _('Login'));
 103                 common_element_end('form');
 104                 common_element_start('p');
 105                 common_element('a', array('href' => common_local_url('recoverpassword')),
 106                                            _('Lost or forgotten password?'));
 107                 common_element_end('p');
 108                 common_show_footer();
 109         }
 110
 111         function get_instructions() {
 112                 if (common_logged_in() &&
 113                         !common_is_real_login() &&
 114                         common_get_returnto())
 115                 {
 116                         # rememberme logins have to reauthenticate before
 117                         # changing any profile settings (cookie-stealing protection)
 118                         return _('For security reasons, please re-enter your ' .
 119                                          'user name and password ' .
 120                                          'before changing your settings.');
 121                 } else {
 122                         return _('Login with your username and password. ' .
 123                                          'Don\'t have a username yet? ' .
 124                                          '[Register](%%action.register%%) a new account, or ' .
 125                                          'try [OpenID](%%action.openidlogin%%). ');
 126                 }
 127         }
 128
 129         function show_top($error=NULL) {
 130                 if ($error) {
 131                         common_element('p', 'error', $error);
 132                 } else {
 133                         $instr = $this->get_instructions();
 134                         $output = common_markup_to_html($instr);
 135                         common_element_start('div', 'instructions');
 136                         common_raw($output);
 137                         common_element_end('div');
 138                 }
 139         }
 140 }