<?php
/**
* Part of the Joomla Framework Application Package
*
* @copyright Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Application\Web;
/**
* Class to model a Web Client.
*
* @property-read integer $platform The detected platform on which the web client runs.
* @property-read boolean $mobile True if the web client is a mobile device.
* @property-read integer $engine The detected rendering engine used by the web client.
* @property-read integer $browser The detected browser used by the web client.
* @property-read string $browserVersion The detected browser version used by the web client.
* @property-read array $languages The priority order detected accepted languages for the client.
* @property-read array $encodings The priority order detected accepted encodings for the client.
* @property-read string $userAgent The web client's user agent string.
* @property-read string $acceptEncoding The web client's accepted encoding string.
* @property-read string $acceptLanguage The web client's accepted languages string.
* @property-read array $detection An array of flags determining whether or not a detection routine has been run.
* @property-read boolean $robot True if the web client is a robot
* @property-read array $headers An array of all headers sent by client
*
* @since 1.0
*/
class WebClient
{
const WINDOWS = 1;
const WINDOWS_PHONE = 2;
const WINDOWS_CE = 3;
const IPHONE = 4;
const IPAD = 5;
const IPOD = 6;
const MAC = 7;
const BLACKBERRY = 8;
const ANDROID = 9;
const LINUX = 10;
const TRIDENT = 11;
const WEBKIT = 12;
const GECKO = 13;
const PRESTO = 14;
const KHTML = 15;
const AMAYA = 16;
const IE = 17;
const FIREFOX = 18;
const CHROME = 19;
const SAFARI = 20;
const OPERA = 21;
const ANDROIDTABLET = 22;
const EDGE = 23;
const BLINK = 24;
const EDG = 25;
/**
* @var integer The detected platform on which the web client runs.
* @since 1.0
*/
protected $platform;
/**
* @var boolean True if the web client is a mobile device.
* @since 1.0
*/
protected $mobile = false;
/**
* @var integer The detected rendering engine used by the web client.
* @since 1.0
*/
protected $engine;
/**
* @var integer The detected browser used by the web client.
* @since 1.0
*/
protected $browser;
/**
* @var string The detected browser version used by the web client.
* @since 1.0
*/
protected $browserVersion;
/**
* @var array The priority order detected accepted languages for the client.
* @since 1.0
*/
protected $languages = array();
/**
* @var array The priority order detected accepted encodings for the client.
* @since 1.0
*/
protected $encodings = array();
/**
* @var string The web client's user agent string.
* @since 1.0
*/
protected $userAgent;
/**
* @var string The web client's accepted encoding string.
* @since 1.0
*/
protected $acceptEncoding;
/**
* @var string The web client's accepted languages string.
* @since 1.0
*/
protected $acceptLanguage;
/**
* @var boolean True if the web client is a robot.
* @since 1.0
*/
protected $robot = false;
/**
* @var array An array of flags determining whether or not a detection routine has been run.
* @since 1.0
*/
protected $detection = array();
/**
* @var array An array of headers sent by client
* @since 1.3.0
*/
protected $headers;
/**
* Class constructor.
*
* @param string $userAgent The optional user-agent string to parse.
* @param string $acceptEncoding The optional client accept encoding string to parse.
* @param string $acceptLanguage The optional client accept language string to parse.
*
* @since 1.0
*/
public function __construct($userAgent = null, $acceptEncoding = null, $acceptLanguage = null)
{
// If no explicit user agent string was given attempt to use the implicit one from server environment.
if (empty($userAgent) && isset($_SERVER['HTTP_USER_AGENT']))
{
$this->userAgent = $_SERVER['HTTP_USER_AGENT'];
}
else
{
$this->userAgent = $userAgent;
}
// If no explicit acceptable encoding string was given attempt to use the implicit one from server environment.
if (empty($acceptEncoding) && isset($_SERVER['HTTP_ACCEPT_ENCODING']))
{
$this->acceptEncoding = $_SERVER['HTTP_ACCEPT_ENCODING'];
}
else
{
$this->acceptEncoding = $acceptEncoding;
}
// If no explicit acceptable languages string was given attempt to use the implicit one from server environment.
if (empty($acceptLanguage) && isset($_SERVER['HTTP_ACCEPT_LANGUAGE']))
{
$this->acceptLanguage = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
}
else
{
$this->acceptLanguage = $acceptLanguage;
}
}
/**
* Magic method to get an object property's value by name.
*
* @param string $name Name of the property for which to return a value.
*
* @return mixed The requested value if it exists.
*
* @since 1.0
*/
public function __get($name)
{
switch ($name)
{
case 'mobile':
case 'platform':
if (empty($this->detection['platform']))
{
$this->detectPlatform($this->userAgent);
}
break;
case 'engine':
if (empty($this->detection['engine']))
{
$this->detectEngine($this->userAgent);
}
break;
case 'browser':
case 'browserVersion':
if (empty($this->detection['browser']))
{
$this->detectBrowser($this->userAgent);
}
break;
case 'languages':
if (empty($this->detection['acceptLanguage']))
{
$this->detectLanguage($this->acceptLanguage);
}
break;
case 'encodings':
if (empty($this->detection['acceptEncoding']))
{
$this->detectEncoding($this->acceptEncoding);
}
break;
case 'robot':
if (empty($this->detection['robot']))
{
$this->detectRobot($this->userAgent);
}
break;
case 'headers':
if (empty($this->detection['headers']))
{
$this->detectHeaders();
}
break;
}
// Return the property if it exists.
if (isset($this->$name))
{
return $this->$name;
}
}
/**
* Detects the client browser and version in a user agent string.
*
* @param string $userAgent The user-agent string to parse.
*
* @return void
*
* @since 1.0
*/
protected function detectBrowser($userAgent)
{
// Attempt to detect the browser type. Obviously we are only worried about major browsers.
if ((stripos($userAgent, 'MSIE') !== false) && (stripos($userAgent, 'Opera') === false))
{
$this->browser = self::IE;
$patternBrowser = 'MSIE';
}
elseif (stripos($userAgent, 'Trident') !== false)
{
$this->browser = self::IE;
$patternBrowser = ' rv';
}
elseif (stripos($userAgent, 'Edge') !== false)
{
$this->browser = self::EDGE;
$patternBrowser = 'Edge';
}
elseif (stripos($userAgent, 'Edg') !== false)
{
$this->browser = self::EDG;
$patternBrowser = 'Edg';
}
elseif ((stripos($userAgent, 'Firefox') !== false) && (stripos($userAgent, 'like Firefox') === false))
{
$this->browser = self::FIREFOX;
$patternBrowser = 'Firefox';
}
elseif (stripos($userAgent, 'OPR') !== false)
{
$this->browser = self::OPERA;
$patternBrowser = 'OPR';
}
elseif (stripos($userAgent, 'Chrome') !== false)
{
$this->browser = self::CHROME;
$patternBrowser = 'Chrome';
}
elseif (stripos($userAgent, 'Safari') !== false)
{
$this->browser = self::SAFARI;
$patternBrowser = 'Safari';
}
elseif (stripos($userAgent, 'Opera') !== false)
{
$this->browser = self::OPERA;
$patternBrowser = 'Opera';
}
// If we detected a known browser let's attempt to determine the version.
if ($this->browser)
{
// Build the REGEX pattern to match the browser version string within the user agent string.
$pattern = '#(?<browser>Version|' . $patternBrowser . ')[/ :]+(?<version>[0-9.|a-zA-Z.]*)#';
// Attempt to find version strings in the user agent string.
$matches = array();
if (preg_match_all($pattern, $userAgent, $matches))
{
// Do we have both a Version and browser match?
if (\count($matches['browser']) == 2)
{
// See whether Version or browser came first, and use the number accordingly.
if (strripos($userAgent, 'Version') < strripos($userAgent, $patternBrowser))
{
$this->browserVersion = $matches['version'][0];
}
else
{
$this->browserVersion = $matches['version'][1];
}
}
elseif (\count($matches['browser']) > 2)
{
$key = array_search('Version', $matches['browser']);
if ($key)
{
$this->browserVersion = $matches['version'][$key];
}
}
else
{
// We only have a Version or a browser so use what we have.
$this->browserVersion = $matches['version'][0];
}
}
}
// Mark this detection routine as run.
$this->detection['browser'] = true;
}
/**
* Method to detect the accepted response encoding by the client.
*
* @param string $acceptEncoding The client accept encoding string to parse.
*
* @return void
*
* @since 1.0
*/
protected function detectEncoding($acceptEncoding)
{
// Parse the accepted encodings.
$this->encodings = array_map('trim', (array) explode(',', $acceptEncoding));
// Mark this detection routine as run.
$this->detection['acceptEncoding'] = true;
}
/**
* Detects the client rendering engine in a user agent string.
*
* @param string $userAgent The user-agent string to parse.
*
* @return void
*
* @since 1.0
*/
protected function detectEngine($userAgent)
{
if (stripos($userAgent, 'MSIE') !== false || stripos($userAgent, 'Trident') !== false)
{
// Attempt to detect the client engine -- starting with the most popular ... for now.
$this->engine = self::TRIDENT;
}
elseif (stripos($userAgent, 'Edge') !== false || stripos($userAgent, 'EdgeHTML') !== false)
{
$this->engine = self::EDGE;
}
elseif (stripos($userAgent, 'Edg') !== false)
{
$this->engine = self::BLINK;
}
elseif (stripos($userAgent, 'Chrome') !== false)
{
$result = explode('/', stristr($userAgent, 'Chrome'));
$version = explode(' ', $result[1]);
if ($version[0] >= 28)
{
$this->engine = self::BLINK;
}
else
{
$this->engine = self::WEBKIT;
}
}
elseif (stripos($userAgent, 'AppleWebKit') !== false || stripos($userAgent, 'blackberry') !== false)
{
if (stripos($userAgent, 'AppleWebKit') !== false)
{
$result = explode('/', stristr($userAgent, 'AppleWebKit'));
$version = explode(' ', $result[1]);
if ($version[0] === 537.36)
{
// AppleWebKit/537.36 is Blink engine specific, exception is Blink emulated IEMobile, Trident or Edge
$this->engine = self::BLINK;
}
}
// Evidently blackberry uses WebKit and doesn't necessarily report it. Bad RIM.
$this->engine = self::WEBKIT;
}
elseif (stripos($userAgent, 'Gecko') !== false && stripos($userAgent, 'like Gecko') === false)
{
// We have to check for like Gecko because some other browsers spoof Gecko.
$this->engine = self::GECKO;
}
elseif (stripos($userAgent, 'Opera') !== false || stripos($userAgent, 'Presto') !== false)
{
$version = false;
if (preg_match('/Opera[\/| ]?([0-9.]+)/u', $userAgent, $match))
{
$version = \floatval($match[1]);
}
if (preg_match('/Version\/([0-9.]+)/u', $userAgent, $match))
{
if (\floatval($match[1]) >= 10)
{
$version = \floatval($match[1]);
}
}
if ($version !== false && $version >= 15)
{
$this->engine = self::BLINK;
}
else
{
$this->engine = self::PRESTO;
}
}
elseif (stripos($userAgent, 'KHTML') !== false)
{
// *sigh*
$this->engine = self::KHTML;
}
elseif (stripos($userAgent, 'Amaya') !== false)
{
// Lesser known engine but it finishes off the major list from Wikipedia :-)
$this->engine = self::AMAYA;
}
// Mark this detection routine as run.
$this->detection['engine'] = true;
}
/**
* Method to detect the accepted languages by the client.
*
* @param mixed $acceptLanguage The client accept language string to parse.
*
* @return void
*
* @since 1.0
*/
protected function detectLanguage($acceptLanguage)
{
// Parse the accepted encodings.
$this->languages = array_map('trim', (array) explode(',', $acceptLanguage));
// Mark this detection routine as run.
$this->detection['acceptLanguage'] = true;
}
/**
* Detects the client platform in a user agent string.
*
* @param string $userAgent The user-agent string to parse.
*
* @return void
*
* @since 1.0
*/
protected function detectPlatform($userAgent)
{
// Attempt to detect the client platform.
if (stripos($userAgent, 'Windows') !== false)
{
$this->platform = self::WINDOWS;
// Let's look at the specific mobile options in the Windows space.
if (stripos($userAgent, 'Windows Phone') !== false)
{
$this->mobile = true;
$this->platform = self::WINDOWS_PHONE;
}
elseif (stripos($userAgent, 'Windows CE') !== false)
{
$this->mobile = true;
$this->platform = self::WINDOWS_CE;
}
}
elseif (stripos($userAgent, 'iPhone') !== false)
{
// Interestingly 'iPhone' is present in all iOS devices so far including iPad and iPods.
$this->mobile = true;
$this->platform = self::IPHONE;
// Let's look at the specific mobile options in the iOS space.
if (stripos($userAgent, 'iPad') !== false)
{
$this->platform = self::IPAD;
}
elseif (stripos($userAgent, 'iPod') !== false)
{
$this->platform = self::IPOD;
}
}
elseif (stripos($userAgent, 'iPad') !== false)
{
// In case where iPhone is not mentioed in iPad user agent string
$this->mobile = true;
$this->platform = self::IPAD;
}
elseif (stripos($userAgent, 'iPod') !== false)
{
// In case where iPhone is not mentioed in iPod user agent string
$this->mobile = true;
$this->platform = self::IPOD;
}
elseif (preg_match('/macintosh|mac os x/i', $userAgent))
{
// This has to come after the iPhone check because mac strings are also present in iOS devices.
$this->platform = self::MAC;
}
elseif (stripos($userAgent, 'Blackberry') !== false)
{
$this->mobile = true;
$this->platform = self::BLACKBERRY;
}
elseif (stripos($userAgent, 'Android') !== false)
{
$this->mobile = true;
$this->platform = self::ANDROID;
/**
* Attempt to distinguish between Android phones and tablets
* There is no totally foolproof method but certain rules almost always hold
* Android 3.x is only used for tablets
* Some devices and browsers encourage users to change their UA string to include Tablet.
* Google encourages manufacturers to exclude the string Mobile from tablet device UA strings.
* In some modes Kindle Android devices include the string Mobile but they include the string Silk.
*/
if (stripos($userAgent, 'Android 3') !== false || stripos($userAgent, 'Tablet') !== false
|| stripos($userAgent, 'Mobile') === false || stripos($userAgent, 'Silk') !== false)
{
$this->platform = self::ANDROIDTABLET;
}
}
elseif (stripos($userAgent, 'Linux') !== false)
{
$this->platform = self::LINUX;
}
// Mark this detection routine as run.
$this->detection['platform'] = true;
}
/**
* Determines if the browser is a robot or not.
*
* @param string $userAgent The user-agent string to parse.
*
* @return void
*
* @since 1.0
*/
protected function detectRobot($userAgent)
{
if (preg_match('/http|bot|bingbot|googlebot|robot|spider|slurp|crawler|curl|^$/i', $userAgent))
{
$this->robot = true;
}
else
{
$this->robot = false;
}
$this->detection['robot'] = true;
}
/**
* Fills internal array of headers
*
* @return void
*
* @since 1.3.0
*/
protected function detectHeaders()
{
if (\function_exists('getallheaders'))
{
// If php is working under Apache, there is a special function
$this->headers = getallheaders();
}
else
{
// Else we fill headers from $_SERVER variable
$this->headers = array();
foreach ($_SERVER as $name => $value)
{
if (substr($name, 0, 5) == 'HTTP_')
{
$this->headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
}
}
}
// Mark this detection routine as run.
$this->detection['headers'] = true;
}
}