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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) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Http.php 16208 2009-06-21 19:19:26Z thomas $
*/
/**
* @see Zend_Uri
*/
require_once 'Zend/Uri.php';
/**
* @see Zend_Validate_Hostname
*/
require_once 'Zend/Validate/Hostname.php';
/**
* HTTP(S) URI handler
*
* @category Zend
* @package Zend_Uri
* @uses Zend_Uri
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Uri_Http extends Zend_Uri
{
/**
* Character classes for validation regular expressions
*/
const CHAR_ALNUM = 'A-Za-z0-9';
const CHAR_MARK = '-_.!~*\'()\[\]';
const CHAR_RESERVED = ';\/?:@&=+$,';
const CHAR_SEGMENT = ':@&=+$,;';
const CHAR_UNWISE = '{}|\\\\^`';
/**
* HTTP username
*
* @var string
*/
protected $_username = '';
/**
* HTTP password
*
* @var string
*/
protected $_password = '';
/**
* HTTP host
*
* @var string
*/
protected $_host = '';
/**
* HTTP post
*
* @var string
*/
protected $_port = '';
/**
* HTTP part
*
* @var string
*/
protected $_path = '';
/**
* HTTP query
*
* @var string
*/
protected $_query = '';
/**
* HTTP fragment
*
* @var string
*/
protected $_fragment = '';
/**
* Regular expression grammar rules for validation; values added by constructor
*
* @var array
*/
protected $_regex = array();
/**
* Constructor accepts a string $scheme (e.g., http, https) and a scheme-specific part of the URI
* (e.g., example.com/path/to/resource?query=param#fragment)
*
* @param string $scheme The scheme of the URI
* @param string $schemeSpecific The scheme-specific part of the URI
* @throws Zend_Uri_Exception When the URI is not valid
*/
protected function __construct($scheme, $schemeSpecific = '')
{
// Set the scheme
$this->_scheme = $scheme;
// Set up grammar rules for validation via regular expressions. These
// are to be used with slash-delimited regular expression strings.
// Escaped special characters (eg. '%25' for '%')
$this->_regex['escaped'] = '%[[:xdigit:]]{2}';
// Unreserved characters
$this->_regex['unreserved'] = '[' . self::CHAR_ALNUM . self::CHAR_MARK . ']';
// Segment can use escaped, unreserved or a set of additional chars
$this->_regex['segment'] = '(?:' . $this->_regex['escaped'] . '|[' .
self::CHAR_ALNUM . self::CHAR_MARK . self::CHAR_SEGMENT . '])*';
// Path can be a series of segmets char strings seperated by '/'
$this->_regex['path'] = '(?:\/(?:' . $this->_regex['segment'] . ')?)+';
// URI characters can be escaped, alphanumeric, mark or reserved chars
$this->_regex['uric'] = '(?:' . $this->_regex['escaped'] . '|[' .
self::CHAR_ALNUM . self::CHAR_MARK . self::CHAR_RESERVED .
// If unwise chars are allowed, add them to the URI chars class
(self::$_config['allow_unwise'] ? self::CHAR_UNWISE : '') . '])';
// If no scheme-specific part was supplied, the user intends to create
// a new URI with this object. No further parsing is required.
if (strlen($schemeSpecific) === 0) {
return;
}
// Parse the scheme-specific URI parts into the instance variables.
$this->_parseUri($schemeSpecific);
// Validate the URI
if ($this->valid() === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Invalid URI supplied');
}
}
/**
* Creates a Zend_Uri_Http from the given string
*
* @param string $uri String to create URI from, must start with
* 'http://' or 'https://'
* @throws InvalidArgumentException When the given $uri is not a string or
* does not start with http:// or https://
* @throws Zend_Uri_Exception When the given $uri is invalid
* @return Zend_Uri_Http
*/
public static function fromString($uri)
{
if (is_string($uri) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('$uri is not a string');
}
$uri = explode(':', $uri, 2);
$scheme = strtolower($uri[0]);
$schemeSpecific = isset($uri[1]) === true ? $uri[1] : '';
if (in_array($scheme, array('http', 'https')) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Invalid scheme: '$scheme'");
}
$schemeHandler = new Zend_Uri_Http($scheme, $schemeSpecific);
return $schemeHandler;
}
/**
* Parse the scheme-specific portion of the URI and place its parts into instance variables.
*
* @param string $schemeSpecific The scheme-specific portion to parse
* @throws Zend_Uri_Exception When scheme-specific decoposition fails
* @throws Zend_Uri_Exception When authority decomposition fails
* @return void
*/
protected function _parseUri($schemeSpecific)
{
// High-level decomposition parser
$pattern = '~^((//)([^/?#]*))([^?#]*)(\?([^#]*))?(#(.*))?$~';
$status = @preg_match($pattern, $schemeSpecific, $matches);
if ($status === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Internal error: scheme-specific decomposition failed');
}
// Failed decomposition; no further processing needed
if ($status === false) {
return;
}
// Save URI components that need no further decomposition
$this->_path = isset($matches[4]) === true ? $matches[4] : '';
$this->_query = isset($matches[6]) === true ? $matches[6] : '';
$this->_fragment = isset($matches[8]) === true ? $matches[8] : '';
// Additional decomposition to get username, password, host, and port
$combo = isset($matches[3]) === true ? $matches[3] : '';
$pattern = '~^(([^:@]*)(:([^@]*))?@)?([^:]+)(:(.*))?$~';
$status = @preg_match($pattern, $combo, $matches);
if ($status === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Internal error: authority decomposition failed');
}
// Failed decomposition; no further processing needed
if ($status === false) {
return;
}
// Save remaining URI components
$this->_username = isset($matches[2]) === true ? $matches[2] : '';
$this->_password = isset($matches[4]) === true ? $matches[4] : '';
$this->_host = isset($matches[5]) === true ? $matches[5] : '';
$this->_port = isset($matches[7]) === true ? $matches[7] : '';
}
/**
* Returns a URI based on current values of the instance variables. If any
* part of the URI does not pass validation, then an exception is thrown.
*
* @throws Zend_Uri_Exception When one or more parts of the URI are invalid
* @return string
*/
public function getUri()
{
if ($this->valid() === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('One or more parts of the URI are invalid');
}
$password = strlen($this->_password) > 0 ? ":$this->_password" : '';
$auth = strlen($this->_username) > 0 ? "$this->_username$password@" : '';
$port = strlen($this->_port) > 0 ? ":$this->_port" : '';
$query = strlen($this->_query) > 0 ? "?$this->_query" : '';
$fragment = strlen($this->_fragment) > 0 ? "#$this->_fragment" : '';
return $this->_scheme
. '://'
. $auth
. $this->_host
. $port
. $this->_path
. $query
. $fragment;
}
/**
* Validate the current URI from the instance variables. Returns true if and only if all
* parts pass validation.
*
* @return boolean
*/
public function valid()
{
// Return true if and only if all parts of the URI have passed validation
return $this->validateUsername()
and $this->validatePassword()
and $this->validateHost()
and $this->validatePort()
and $this->validatePath()
and $this->validateQuery()
and $this->validateFragment();
}
/**
* Returns the username portion of the URL, or FALSE if none.
*
* @return string
*/
public function getUsername()
{
return strlen($this->_username) > 0 ? $this->_username : false;
}
/**
* Returns true if and only if the username passes validation. If no username is passed,
* then the username contained in the instance variable is used.
*
* @param string $username The HTTP username
* @throws Zend_Uri_Exception When username validation fails
* @return boolean
* @link http://www.faqs.org/rfcs/rfc2396.html
*/
public function validateUsername($username = null)
{
if ($username === null) {
$username = $this->_username;
}
// If the username is empty, then it is considered valid
if (strlen($username) === 0) {
return true;
}
// Check the username against the allowed values
$status = @preg_match('/^(?:' . $this->_regex['escaped'] . '|[' .
self::CHAR_ALNUM . self::CHAR_MARK . ';:&=+$,' . '])+$/', $username);
if ($status === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Internal error: username validation failed');
}
return $status === 1;
}
/**
* Sets the username for the current URI, and returns the old username
*
* @param string $username The HTTP username
* @throws Zend_Uri_Exception When $username is not a valid HTTP username
* @return string
*/
public function setUsername($username)
{
if ($this->validateUsername($username) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Username \"$username\" is not a valid HTTP username");
}
$oldUsername = $this->_username;
$this->_username = $username;
return $oldUsername;
}
/**
* Returns the password portion of the URL, or FALSE if none.
*
* @return string
*/
public function getPassword()
{
return strlen($this->_password) > 0 ? $this->_password : false;
}
/**
* Returns true if and only if the password passes validation. If no password is passed,
* then the password contained in the instance variable is used.
*
* @param string $password The HTTP password
* @throws Zend_Uri_Exception When password validation fails
* @return boolean
* @link http://www.faqs.org/rfcs/rfc2396.html
*/
public function validatePassword($password = null)
{
if ($password === null) {
$password = $this->_password;
}
// If the password is empty, then it is considered valid
if (strlen($password) === 0) {
return true;
}
// If the password is nonempty, but there is no username, then it is considered invalid
if (strlen($password) > 0 and strlen($this->_username) === 0) {
return false;
}
// Check the password against the allowed values
$status = @preg_match('/^(?:' . $this->_regex['escaped'] . '|[' .
self::CHAR_ALNUM . self::CHAR_MARK . ';:&=+$,' . '])+$/', $password);
if ($status === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Internal error: password validation failed.');
}
return $status == 1;
}
/**
* Sets the password for the current URI, and returns the old password
*
* @param string $password The HTTP password
* @throws Zend_Uri_Exception When $password is not a valid HTTP password
* @return string
*/
public function setPassword($password)
{
if ($this->validatePassword($password) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Password \"$password\" is not a valid HTTP password.");
}
$oldPassword = $this->_password;
$this->_password = $password;
return $oldPassword;
}
/**
* Returns the domain or host IP portion of the URL, or FALSE if none.
*
* @return string
*/
public function getHost()
{
return strlen($this->_host) > 0 ? $this->_host : false;
}
/**
* Returns true if and only if the host string passes validation. If no host is passed,
* then the host contained in the instance variable is used.
*
* @param string $host The HTTP host
* @return boolean
* @uses Zend_Filter
*/
public function validateHost($host = null)
{
if ($host === null) {
$host = $this->_host;
}
// If the host is empty, then it is considered invalid
if (strlen($host) === 0) {
return false;
}
// Check the host against the allowed values; delegated to Zend_Filter.
$validate = new Zend_Validate_Hostname(Zend_Validate_Hostname::ALLOW_ALL);
return $validate->isValid($host);
}
/**
* Sets the host for the current URI, and returns the old host
*
* @param string $host The HTTP host
* @throws Zend_Uri_Exception When $host is nota valid HTTP host
* @return string
*/
public function setHost($host)
{
if ($this->validateHost($host) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Host \"$host\" is not a valid HTTP host");
}
$oldHost = $this->_host;
$this->_host = $host;
return $oldHost;
}
/**
* Returns the TCP port, or FALSE if none.
*
* @return string
*/
public function getPort()
{
return strlen($this->_port) > 0 ? $this->_port : false;
}
/**
* Returns true if and only if the TCP port string passes validation. If no port is passed,
* then the port contained in the instance variable is used.
*
* @param string $port The HTTP port
* @return boolean
*/
public function validatePort($port = null)
{
if ($port === null) {
$port = $this->_port;
}
// If the port is empty, then it is considered valid
if (strlen($port) === 0) {
return true;
}
// Check the port against the allowed values
return ctype_digit((string) $port) and 1 <= $port and $port <= 65535;
}
/**
* Sets the port for the current URI, and returns the old port
*
* @param string $port The HTTP port
* @throws Zend_Uri_Exception When $port is not a valid HTTP port
* @return string
*/
public function setPort($port)
{
if ($this->validatePort($port) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Port \"$port\" is not a valid HTTP port.");
}
$oldPort = $this->_port;
$this->_port = $port;
return $oldPort;
}
/**
* Returns the path and filename portion of the URL, or FALSE if none.
*
* @return string
*/
public function getPath()
{
return strlen($this->_path) > 0 ? $this->_path : '/';
}
/**
* Returns true if and only if the path string passes validation. If no path is passed,
* then the path contained in the instance variable is used.
*
* @param string $path The HTTP path
* @throws Zend_Uri_Exception When path validation fails
* @return boolean
*/
public function validatePath($path = null)
{
if ($path === null) {
$path = $this->_path;
}
// If the path is empty, then it is considered valid
if (strlen($path) === 0) {
return true;
}
// Determine whether the path is well-formed
$pattern = '/^' . $this->_regex['path'] . '$/';
$status = @preg_match($pattern, $path);
if ($status === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Internal error: path validation failed');
}
return (boolean) $status;
}
/**
* Sets the path for the current URI, and returns the old path
*
* @param string $path The HTTP path
* @throws Zend_Uri_Exception When $path is not a valid HTTP path
* @return string
*/
public function setPath($path)
{
if ($this->validatePath($path) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Path \"$path\" is not a valid HTTP path");
}
$oldPath = $this->_path;
$this->_path = $path;
return $oldPath;
}
/**
* Returns the query portion of the URL (after ?), or FALSE if none.
*
* @return string
*/
public function getQuery()
{
return strlen($this->_query) > 0 ? $this->_query : false;
}
/**
* Returns true if and only if the query string passes validation. If no query is passed,
* then the query string contained in the instance variable is used.
*
* @param string $query The query to validate
* @throws Zend_Uri_Exception When query validation fails
* @return boolean
* @link http://www.faqs.org/rfcs/rfc2396.html
*/
public function validateQuery($query = null)
{
if ($query === null) {
$query = $this->_query;
}
// If query is empty, it is considered to be valid
if (strlen($query) === 0) {
return true;
}
// Determine whether the query is well-formed
$pattern = '/^' . $this->_regex['uric'] . '*$/';
$status = @preg_match($pattern, $query);
if ($status === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Internal error: query validation failed');
}
return $status == 1;
}
/**
* Set the query string for the current URI, and return the old query
* string This method accepts both strings and arrays.
*
* @param string|array $query The query string or array
* @throws Zend_Uri_Exception When $query is not a valid query string
* @return string Old query string
*/
public function setQuery($query)
{
$oldQuery = $this->_query;
// If query is empty, set an empty string
if (empty($query) === true) {
$this->_query = '';
return $oldQuery;
}
// If query is an array, make a string out of it
if (is_array($query) === true) {
$query = http_build_query($query, '', '&');
} else {
// If it is a string, make sure it is valid. If not parse and encode it
$query = (string) $query;
if ($this->validateQuery($query) === false) {
parse_str($query, $queryArray);
$query = http_build_query($queryArray, '', '&');
}
}
// Make sure the query is valid, and set it
if ($this->validateQuery($query) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("'$query' is not a valid query string");
}
$this->_query = $query;
return $oldQuery;
}
/**
* Returns the fragment portion of the URL (after #), or FALSE if none.
*
* @return string|false
*/
public function getFragment()
{
return strlen($this->_fragment) > 0 ? $this->_fragment : false;
}
/**
* Returns true if and only if the fragment passes validation. If no fragment is passed,
* then the fragment contained in the instance variable is used.
*
* @param string $fragment Fragment of an URI
* @throws Zend_Uri_Exception When fragment validation fails
* @return boolean
* @link http://www.faqs.org/rfcs/rfc2396.html
*/
public function validateFragment($fragment = null)
{
if ($fragment === null) {
$fragment = $this->_fragment;
}
// If fragment is empty, it is considered to be valid
if (strlen($fragment) === 0) {
return true;
}
// Determine whether the fragment is well-formed
$pattern = '/^' . $this->_regex['uric'] . '*$/';
$status = @preg_match($pattern, $fragment);
if ($status === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception('Internal error: fragment validation failed');
}
return (boolean) $status;
}
/**
* Sets the fragment for the current URI, and returns the old fragment
*
* @param string $fragment Fragment of the current URI
* @throws Zend_Uri_Exception When $fragment is not a valid HTTP fragment
* @return string
*/
public function setFragment($fragment)
{
if ($this->validateFragment($fragment) === false) {
require_once 'Zend/Uri/Exception.php';
throw new Zend_Uri_Exception("Fragment \"$fragment\" is not a valid HTTP fragment");
}
$oldFragment = $this->_fragment;
$this->_fragment = $fragment;
return $oldFragment;
}
}
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