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First steps to using exceptions for error handling

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Added two exception classes: one for client errors (= user can fix) and
one for server errors (only admin or coder can fix). The web entry point
now tries to catch exceptions and show them in the browser. The main
code for showing errors in Action class now throws an exception and lets
top-level handle it.
This commit is contained in:
Evan Prodromou 2009-02-09 07:12:08 -05:00
parent 12d7c30ef7
commit 9152c0bdc8
2 changed files with 111 additions and 0 deletions
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56
lib/clientexception.php Normal file
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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* class for a client exception (user error)
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Exception
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2008 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* Class for client exceptions
*
* Subclass of PHP Exception for user errors.
*
* @category Exception
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
class ClientException extends Exception
{
public function __construct($message = null, $code = 400) {
parent::__construct($message, $code);
}
// custom string representation of object
public function __toString() {
return __CLASS__ . ": [{$this->code}]: {$this->message}\n";
}
}

55
lib/serverexception.php Normal file
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<?php
/**
* Laconica, the distributed open-source microblogging tool
*
* class for a server exception (user error)
*
* PHP version 5
*
* LICENCE: This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Exception
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @copyright 2008 Control Yourself, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
if (!defined('LACONICA')) {
exit(1);
}
/**
* Class for server exceptions
*
* Subclass of PHP Exception for server errors. The user typically can't fix these.
*
* @category Exception
* @package Laconica
* @author Evan Prodromou <evan@controlyourself.ca>
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://laconi.ca/
*/
class ServerException extends Exception
{
public function __construct($message = null, $code = 400) {
parent::__construct($message, $code);
}
public function __toString() {
return __CLASS__ . ": [{$this->code}]: {$this->message}\n";
}
}