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 is_readonly() {
  25                 return true;
  26         }
  27
  28         function handle($args) {
  29                 parent::handle($args);
  30                 if (common_is_real_login()) {
  31                         common_user_error(_('Already logged in.'));
  32                 } else if ($_SERVER['REQUEST_METHOD'] == 'POST') {
  33                         $this->check_login();
  34                 } else {
  35                         $this->show_form();
  36                 }
  37         }
  38
  39         function check_login() {
  40                 # XXX: form token in $_SESSION to prevent XSS
  41                 # XXX: login throttle
  42                 $nickname = common_canonical_nickname($this->trimmed('nickname'));
  43                 $password = $this->arg('password');
  44                 if (common_check_user($nickname, $password)) {
  45                         # success!
  46                         if (!common_set_user($nickname)) {
  47                                 common_server_error(_('Error setting user.'));
  48                                 return;
  49                         }
  50                         common_real_login(true);
  51                         if ($this->boolean('rememberme')) {
  52                                 common_debug('Adding rememberme cookie for ' . $nickname);
  53                                 common_rememberme();
  54                         }
  55                         # success!
  56                         $url = common_get_returnto();
  57                         if ($url) {
  58                                 # We don't have to return to it again
  59                                 common_set_returnto(NULL);
  60                         } else {
  61                                 $url = common_local_url('all',
  62                                                                                 array('nickname' =>
  63                                                                                           $nickname));
  64                         }
  65                         common_redirect($url);
  66                 } else {
  67                         $this->show_form(_('Incorrect username or password.'));
  68                         return;
  69                 }
  70
  71                 # success!
  72                 if (!common_set_user($user)) {
  73                         common_server_error(_('Error setting user.'));
  74                         return;
  75                 }
  76
  77                 common_real_login(true);
  78
  79                 if ($this->boolean('rememberme')) {
  80                         common_debug('Adding rememberme cookie for ' . $nickname);
  81                         common_rememberme($user);
  82                 }
  83                 # success!
  84                 $url = common_get_returnto();
  85                 if ($url) {
  86                         # We don't have to return to it again
  87                         common_set_returnto(NULL);
  88                 } else {
  89                         $url = common_local_url('all',
  90                                                                         array('nickname' =>
  91                                                                                   $nickname));
  92                 }
  93                 common_redirect($url);
  94         }
  95
  96         function show_form($error=NULL) {
  97                 common_show_header(_('Login'), NULL, $error, array($this, 'show_top'));
  98                 common_element_start('form', array('method' => 'post',
  99                                                                                    'id' => 'login',
 100                                                                                    'action' => common_local_url('login')));
 101                 common_input('nickname', _('Nickname'));
 102                 common_password('password', _('Password'));
 103                 common_checkbox('rememberme', _('Remember me'), false,
 104                                 _('Automatically login in the future; ' .
 105                                    'not for shared computers!'));
 106                 common_submit('submit', _('Login'));
 107                 common_element_end('form');
 108                 common_element_start('p');
 109                 common_element('a', array('href' => common_local_url('recoverpassword')),
 110                                            _('Lost or forgotten password?'));
 111                 common_element_end('p');
 112                 common_show_footer();
 113         }
 114
 115         function get_instructions() {
 116                 if (common_logged_in() &&
 117                         !common_is_real_login() &&
 118                         common_get_returnto())
 119                 {
 120                         # rememberme logins have to reauthenticate before
 121                         # changing any profile settings (cookie-stealing protection)
 122                         return _('For security reasons, please re-enter your ' .
 123                                          'user name and password ' .
 124                                          'before changing your settings.');
 125                 } else {
 126                         return _('Login with your username and password. ' .
 127                                          'Don\'t have a username yet? ' .
 128                                          '[Register](%%action.register%%) a new account, or ' .
 129                                          'try [OpenID](%%action.openidlogin%%). ');
 130                 }
 131         }
 132
 133         function show_top($error=NULL) {
 134                 if ($error) {
 135                         common_element('p', 'error', $error);
 136                 } else {
 137                         $instr = $this->get_instructions();
 138                         $output = common_markup_to_html($instr);
 139                         common_element_start('div', 'instructions');
 140                         common_raw($output);
 141                         common_element_end('div');
 142                 }
 143         }
 144 }