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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) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Uri.php 24593 2012-01-05 20:35:02Z matthew $
*/
/**
* Abstract class for all Zend_Uri handlers
*
* @category Zend
* @package Zend_Uri
* @copyright Copyright (c) 2005-2012 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 = '';
/**
* Global configuration array
*
* @var array
*/
static protected $_config = array(
'allow_unwise' => false
);
/**
* Return a string representation of this URI.
*
* @see getUri()
* @return string
*/
public function __toString()
{
try {
return $this->getUri();
} catch (Exception $e) {
trigger_error($e->getMessage(), E_USER_WARNING);
return '';
}
}
/**
* 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 $uri The URI to check
* @return boolean
*/
public static function check($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 The URI form which a Zend_Uri instance is created
* @param string $className The name of the class to use in order to manipulate URI
* @throws Zend_Uri_Exception When an empty string was supplied for the scheme
* @throws Zend_Uri_Exception When an illegal scheme is supplied
* @throws Zend_Uri_Exception When the scheme is not supported
* @throws Zend_Uri_Exception When $className doesn't exist or doesn't implements Zend_Uri
* @return Zend_Uri
* @link http://www.faqs.org/rfcs/rfc2396.html
*/
public static function factory($uri = 'http', $className = null)
{
// Separate the scheme from the scheme-specific parts
$uri = explode(':', $uri, 2);
$scheme = strtolower($uri[0]);
$schemeSpecific = isset($uri[1]) === true ? $uri[1] : '';
if (strlen($scheme) === 0) {
require_once '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) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Illegal scheme supplied, only alphanumeric characters are permitted');
}
if ($className === null) {
/**
* 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':
// Break intentionally omitted
case 'https':
$className = 'Zend_Uri_Http';
break;
case 'mailto':
// TODO
default:
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Scheme \"$scheme\" is not supported");
break;
}
}
require_once 'Zend/Loader.php';
try {
Zend_Loader::loadClass($className);
} catch (Exception $e) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("\"$className\" not found");
}
$schemeHandler = new $className($scheme, $schemeSpecific);
if (! $schemeHandler instanceof Zend_Uri) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("\"$className\" is not an instance of Zend_Uri");
}
return $schemeHandler;
}
/**
* Get the URI's scheme
*
* @return string|false Scheme or false if no scheme is set.
*/
public function getScheme()
{
if (empty($this->_scheme) === false) {
return $this->_scheme;
} else {
return false;
}
}
/**
* Set global configuration options
*
* @param Zend_Config|array $config
*/
static public function setConfig($config)
{
if ($config instanceof Zend_Config) {
$config = $config->toArray();
} elseif (!is_array($config)) {
throw new Zend_Uri_Exception("Config must be an array or an instance of Zend_Config.");
}
foreach ($config as $k => $v) {
self::$_config[$k] = $v;
}
}
/**
* Zend_Uri and its subclasses cannot be instantiated directly.
* Use Zend_Uri::factory() to return a new Zend_Uri object.
*
* @param string $scheme The scheme of the URI
* @param string $schemeSpecific The scheme-specific part of the URI
*/
abstract protected function __construct($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();
}