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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Uri
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Uri.php 8064 2008-02-16 10:58:39Z thomas $
*/
/**
* @see Zend_Loader
*/
require_once 'external/Zend/Loader.php';
/**
* @category Zend
* @package Zend_Uri
* @copyright Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
abstract class Zend_Uri {
/**
* Scheme of this URI (http, ftp, etc.)
* @var string
*/
protected $_scheme = '';
/**
* Return a string representation of this URI.
*
* @see getUri()
* @return string
*/
public function __toString() {
return $this->getUri();
}
/**
* Convenience function, checks that a $uri string is well-formed
* by validating it but not returning an object. Returns TRUE if
* $uri is a well-formed URI, or FALSE otherwise.
*
* @param string $uri
* @return boolean
*/
public static function check($uri) {
try {
$uri = self::factory($uri);
} catch (Exception $e) {
return false;
}
return $uri->valid();
}
/**
* Create a new Zend_Uri object for a URI. If building a new URI, then $uri should contain
* only the scheme (http, ftp, etc). Otherwise, supply $uri with the complete URI.
*
* @param string $uri
* @throws Zend_Uri_Exception
* @return Zend_Uri
*/
public static function factory($uri = 'http') {
/**
* Separate the scheme from the scheme-specific parts
* @link http://www.faqs.org/rfcs/rfc2396.html
*/
$uri = explode(':', $uri, 2);
$scheme = strtolower($uri[0]);
$schemeSpecific = isset($uri[1]) ? $uri[1] : '';
if (! strlen($scheme)) {
require_once 'external/Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('An empty string was supplied for the scheme');
}
// Security check: $scheme is used to load a class file, so only alphanumerics are allowed.
if (! ctype_alnum($scheme)) {
require_once 'external/Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Illegal scheme supplied, only alphanumeric characters are permitted');
}
/**
* Create a new Zend_Uri object for the $uri. If a subclass of Zend_Uri exists for the
* scheme, return an instance of that class. Otherwise, a Zend_Uri_Exception is thrown.
*/
switch ($scheme) {
case 'http':
case 'https':
$className = 'Zend_Uri_Http';
break;
case 'mailto':
// @todo
default:
require_once 'external/Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Scheme \"$scheme\" is not supported");
}
Zend_Loader::loadClass($className);
return new $className($scheme, $schemeSpecific);
}
/**
* Get the URI's scheme
*
* @return string|false Scheme or false if no scheme is set.
*/
public function getScheme() {
if (! empty($this->_scheme)) {
return $this->_scheme;
} else {
return false;
}
}
/******************************************************************************
* Abstract Methods
*****************************************************************************/
/**
* Zend_Uri and its subclasses cannot be instantiated directly.
* Use Zend_Uri::factory() to return a new Zend_Uri object.
*/
abstract protected function __construct($scheme, $schemeSpecific = '');
/**
* Return a string representation of this URI.
*
* @return string
*/
abstract public function getUri();
/**
* Returns TRUE if this URI is valid, or FALSE otherwise.
*
* @return boolean
*/
abstract public function valid();
}
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