extern/egroupware_official
1
0
Fork 0
mirror of https://github.com/EGroupware/egroupware.git synced 2024-11-30 20:04:30 +01:00
Code Issues Packages Projects Releases Wiki Activity
8b49db5a57
egroupware_official/phpgwapi/inc/horde/Horde/Browser.php

1083 lines
35 KiB
PHP
Raw Normal View History

first commit of syncml code
2005-06-19 21:00:58 +02:00
<?php
require_once 'Horde/String.php';
/**
* The Browser:: class provides capability information for the current
* web client. Browser identification is performed by examining the
* HTTP_USER_AGENT environmental variable provide by the web server.
*
* $Horde: framework/Browser/Browser.php,v 1.166 2005/02/22 20:43:58 eraserhd Exp $
*
* Copyright 1999-2005 Chuck Hagenbuch <chuck@horde.org>
* Copyright 1999-2005 Jon Parise <jon@horde.org>
*
* See the enclosed file COPYING for license information (LGPL). If you
* did not receive this file, see http://www.fsf.org/copyleft/lgpl.html.
*
* @author Chuck Hagenbuch <chuck@horde.org>
* @author Jon Parise <jon@horde.org>
* @since Horde 1.3
* @package Horde_Browser
*/
class Browser {
/**
* Major version number.
*
* @var integer $_majorVersion
*/
var $_majorVersion = 0;
/**
* Minor version number.
*
* @var integer $_minorVersion
*/
var $_minorVersion = 0;
/**
* Browser name.
*
* @var string $_browser
*/
var $_browser = '';
/**
* Full user agent string.
*
* @var string $_agent
*/
var $_agent = '';
/**
* Lower-case user agent string.
*
* @var string $_agent
*/
var $_lowerAgent = '';
/**
* HTTP_ACCEPT string
*
* @var string $_accept
*/
var $_accept = '';
/**
* Platform the browser is running on.
*
* @var string $_platform
*/
var $_platform = '';
/**
* Known robots.
*
* @var array $_robots
*/
var $_robots = array(
/* The most common ones. */
'Googlebot',
'msnbot',
'Slurp',
'Yahoo',
/* The rest alphabetically. */
'Arachnoidea',
'ArchitextSpider',
'Ask Jeeves',
'B-l-i-t-z-Bot',
'ConveraCrawler',
'ExtractorPro',
'FAST-WebCrawler',
'FDSE robot',
'fido',
'geckobot',
'Gigabot',
'Girafabot',
'grub-client',
'Gulliver',
'ia_archiver',
'InfoSeek',
'KIT-Fireball',
'LEIA',
'Lycos_Spider',
'Mediapartners-Google',
'MuscatFerret',
'NaverBot',
'polybot',
'Pompos',
'Scooter',
'Teoma',
'TurnitinBot',
'Ultraseek',
'ViolaBot',
'webbandit',
'www.almaden.ibm.com/cs/crawler',
'ZyBorg',
);
/**
* Is this a mobile browser?
*
* @var boolean $_mobile
*/
var $_mobile = false;
/**
* Features.
*
* @var array $_features
*/
var $_features = array(
'html' => true,
'hdml' => false,
'wml' => false,
'images' => true,
'iframes' => false,
'frames' => true,
'tables' => true,
'java' => true,
'javascript' => true,
'dom' => false,
'utf' => false,
'rte' => false,
'homepage' => false,
'accesskey' => false,
'optgroup' => false,
'xmlhttpreq' => false,
'cite' => false,
);
/**
* Quirks
*
* @var array $_quirks
*/
var $_quirks = array(
'avoid_popup_windows' => false,
'break_disposition_header' => false,
'break_disposition_filename' => false,
'broken_multipart_form' => false,
'buggy_compression' => false,
'cache_same_url' => false,
'cache_ssl_downloads' => false,
'double_linebreak_textarea' => false,
'empty_file_input_value' => false,
'must_cache_forms' => false,
'no_filename_spaces' => false,
'no_hidden_overflow_tables' => false,
'ow_gui_1.3' => false,
'png_transparency' => false,
'scrollbar_in_way' => false,
'scroll_tds' => false,
);
/**
* List of viewable image MIME subtypes.
* This list of viewable images works for IE and Netscape/Mozilla.
*
* @var array $_images
*/
var $_images = array('jpeg', 'gif', 'png', 'pjpeg', 'x-png', 'bmp');
/**
/**
* Returns a reference to the global Browser object, only creating it
* if it doesn't already exist.
*
* This method must be invoked as:
* $browser = &Browser::singleton([$userAgent[, $accept]]);
*
* @access public
*
* @param optional string $userAgent The browser string to parse.
* @param optional string $accept The HTTP_ACCEPT settings to use.
*
* @return object Browser The Browser object.
*/
function &singleton($userAgent = null, $accept = null)
{
static $instances;
if (!isset($instances)) {
$instances = array();
}
$signature = serialize(array($userAgent, $accept));
if (empty($instances[$signature])) {
$instances[$signature] = new Browser($userAgent, $accept);
}
return $instances[$signature];
}
/**
* Create a browser instance (Constructor).
*
* @access public
*
* @param optional string $userAgent The browser string to parse.
* @param optional string $accept The HTTP_ACCEPT settings to use.
*/
function Browser($userAgent = null, $accept = null)
{
$this->match($userAgent, $accept);
}
/**
* Parses the user agent string and inititializes the object with
* all the known features and quirks for the given browser.
*
* @access public
*
* @param optional string $userAgent The browser string to parse.
* @param optional string $accept The HTTP_ACCEPT settings to use.
*/
function match($userAgent = null, $accept = null)
{
// Set our agent string.
if (is_null($userAgent)) {
if (isset($_SERVER['HTTP_USER_AGENT'])) {
$this->_agent = trim($_SERVER['HTTP_USER_AGENT']);
}
} else {
$this->_agent = $userAgent;
}
$this->_lowerAgent = String::lower($this->_agent);
// Set our accept string.
if (is_null($accept)) {
if (isset($_SERVER['HTTP_ACCEPT'])) {
$this->_accept = String::lower(trim($_SERVER['HTTP_ACCEPT']));
}
} else {
$this->_accept = String::lower($accept);
}
// Check for UTF support.
if (isset($_SERVER['HTTP_ACCEPT_CHARSET'])) {
$this->setFeature('utf', strpos(String::lower($_SERVER['HTTP_ACCEPT_CHARSET']), 'utf') !== false);
}
if (!empty($this->_agent)) {
$this->_setPlatform();
if (preg_match('|Opera[/ ]([0-9.]+)|', $this->_agent, $version)) {
$this->setBrowser('opera');
list($this->_majorVersion, $this->_minorVersion) = explode('.', $version[1]);
$this->setFeature('javascript', true);
$this->setQuirk('no_filename_spaces');
switch ($this->_majorVersion) {
case 7:
$this->setFeature('dom');
$this->setFeature('iframes');
$this->setFeature('accesskey');
$this->setFeature('optgroup');
$this->setQuirk('double_linebreak_textarea');
break;
}
} elseif (strpos($this->_lowerAgent, 'elaine/') !== false ||
strpos($this->_lowerAgent, 'palmsource') !== false ||
strpos($this->_lowerAgent, 'digital paths') !== false) {
$this->setBrowser('palm');
$this->setFeature('images', false);
$this->setFeature('frames', false);
$this->setFeature('javascript', false);
$this->setQuirk('avoid_popup_windows');
$this->_mobile = true;
} elseif ((preg_match('|MSIE ([0-9.]+)|', $this->_agent, $version)) ||
(preg_match('|Internet Explorer/([0-9.]+)|', $this->_agent, $version))) {
$this->setBrowser('msie');
$this->setQuirk('cache_ssl_downloads');
$this->setQuirk('cache_same_url');
$this->setQuirk('break_disposition_filename');
if (strpos($version[1], '.') !== false) {
list($this->_majorVersion, $this->_minorVersion) = explode('.', $version[1]);
} else {
$this->_majorVersion = $version[1];
$this->_minorVersion = 0;
}
/* IE on Windows does not support alpha transparency in PNG
* images. */
if (preg_match('/windows/i', $this->_agent)) {
$this->setQuirk('png_transparency');
}
/* IE 6 (pre-SP1) and 5.5 (pre-SP1) has buggy compression.
* The versions affected are as follows:
* 6.00.2462.0000 Internet Explorer 6 Public Preview (Beta)
* 6.00.2479.0006 Internet Explorer 6 Public Preview (Beta)
Refresh
* 6.00.2600.0000 Internet Explorer 6 (Windows XP)
* 5.50.3825.1300 Internet Explorer 5.5 Developer Preview (Beta)
* 5.50.4030.2400 Internet Explorer 5.5 & Internet Tools Beta
* 5.50.4134.0100 Internet Explorer 5.5 for Windows Me (4.90.3000)
* 5.50.4134.0600 Internet Explorer 5.5
* 5.50.4308.2900 Internet Explorer 5.5 Advanced Security Privacy Beta
*
* See:
* ====
* http://support.microsoft.com/kb/164539;
* http://support.microsoft.com/default.aspx?scid=kb;en-us;Q312496)
* http://support.microsoft.com/default.aspx?scid=kb;en-us;Q313712
*/
$ie_vers = $this->getIEVersion();
$buggy_list = array(
'6,00,2462,0000', '6,00,2479,0006', '6,00,2600,0000',
'5,50,3825,1300', '5,50,4030,2400', '5,50,4134,0100',
'5,50,4134,0600', '5,50,4308,2900'
);
if (!is_null($ie_vers) && in_array($ie_vers, $buggy_list)) {
$this->setQuirk('buggy_compression');
}
/* Some Handhelds have their screen resolution in the
* user agent string, which we can use to look for
* mobile agents. */
if (preg_match('/; (120x160|240x280|240x320)\)/', $this->_agent)) {
$this->_mobile = true;
}
switch ($this->_majorVersion) {
case 6:
$this->setFeature('javascript', 1.4);
$this->setFeature('dom');
$this->setFeature('iframes');
$this->setFeature('utf');
$this->setFeature('rte');
$this->setFeature('homepage');
$this->setFeature('accesskey');
$this->setFeature('optgroup');
$this->setFeature('xmlhttpreq');
$this->setQuirk('scrollbar_in_way');
$this->setQuirk('broken_multipart_form');
break;
case 5:
if ($this->getPlatform() == 'mac') {
$this->setFeature('javascript', 1.2);
$this->setFeature('optgroup');
} else {
// MSIE 5 for Windows.
$this->setFeature('javascript', 1.4);
$this->setFeature('dom');
$this->setFeature('xmlhttpreq');
if ($this->_minorVersion >= 5) {
$this->setFeature('rte');
}
}
$this->setFeature('iframes');
$this->setFeature('utf');
$this->setFeature('homepage');
$this->setFeature('accesskey');
if ($this->_minorVersion == 5) {
$this->setQuirk('break_disposition_header');
$this->setQuirk('broken_multipart_form');
}
break;
case 4:
$this->setFeature('javascript', 1.2);
$this->setFeature('accesskey');
if ($this->_minorVersion > 0) {
$this->setFeature('utf');
}
break;
case 3:
$this->setFeature('javascript', 1.1);
$this->setQuirk('avoid_popup_windows');
break;
}
} elseif (preg_match('|ANTFresco/([0-9]+)|', $this->_agent, $version)) {
$this->setBrowser('fresco');
$this->setFeature('javascript', 1.1);
$this->setQuirk('avoid_popup_windows');
} elseif (strpos($this->_lowerAgent, 'avantgo') !== false) {
$this->setBrowser('avantgo');
$this->_mobile = true;
} elseif (preg_match('|Konqueror/([0-9]+)|', $this->_agent, $version) ||
preg_match('|Safari/([0-9]+)\.?([0-9]+)?|', $this->_agent, $version)) {
// Konqueror and Apple's Safari both use the KHTML
// rendering engine.
$this->setBrowser('konqueror');
$this->setQuirk('empty_file_input_value');
$this->setQuirk('no_hidden_overflow_tables');
$this->_majorVersion = $version[1];
if (isset($version[2])) {
$this->_minorVersion = $version[2];
}
if (strpos($this->_agent, 'Safari') !== false &&
$this->_majorVersion >= 60) {
// Safari.
$this->setFeature('utf');
$this->setFeature('javascript', 1.4);
$this->setFeature('dom');
$this->setFeature('iframes');
if ($this->_majorVersion > 125 ||
($this->_majorVersion == 125 &&
$this->_minorVersion >= 1)) {
$this->setFeature('utf');
$this->setFeature('accesskey');
$this->setFeature('xmlhttpreq');
}
} else {
// Konqueror.
$this->setFeature('javascript', 1.1);
switch ($this->_majorVersion) {
case 3:
$this->setFeature('dom');
$this->setFeature('iframes');
break;
}
}
} elseif (preg_match('|Mozilla/([0-9.]+)|', $this->_agent, $version)) {
$this->setBrowser('mozilla');
$this->setQuirk('must_cache_forms');
list($this->_majorVersion, $this->_minorVersion) = explode('.', $version[1]);
switch ($this->_majorVersion) {
case 5:
if ($this->getPlatform() == 'win') {
$this->setQuirk('break_disposition_filename');
}
$this->setFeature('javascript', 1.4);
$this->setFeature('dom');
$this->setFeature('accesskey');
$this->setFeature('optgroup');
$this->setFeature('xmlhttpreq');
$this->setFeature('cite');
if (preg_match('|rv:(.*)\)|', $this->_agent, $revision)) {
if ($revision[1] >= 1) {
$this->setFeature('iframes');
}
if ($revision[1] >= 1.3) {
$this->setFeature('rte');
}
}
break;
case 4:
$this->setFeature('javascript', 1.3);
$this->setQuirk('buggy_compression');
break;
case 3:
default:
$this->setFeature('javascript', 1);
$this->setQuirk('buggy_compression');
break;
}
} elseif (preg_match('|Lynx/([0-9]+)|', $this->_agent, $version)) {
$this->setBrowser('lynx');
$this->setFeature('images', false);
$this->setFeature('frames', false);
$this->setFeature('javascript', false);
$this->setQuirk('avoid_popup_windows');
} elseif (preg_match('|Links \(([0-9]+)|', $this->_agent, $version)) {
$this->setBrowser('links');
$this->setFeature('images', false);
$this->setFeature('frames', false);
$this->setFeature('javascript', false);
$this->setQuirk('avoid_popup_windows');
} elseif (preg_match('|HotJava/([0-9]+)|', $this->_agent, $version)) {
$this->setBrowser('hotjava');
$this->setFeature('javascript', false);
} elseif (strpos($this->_agent, 'UP/') !== false ||
strpos($this->_agent, 'UP.B') !== false ||
strpos($this->_agent, 'UP.L') !== false) {
$this->setBrowser('up');
$this->setFeature('html', false);
$this->setFeature('javascript', false);
$this->setFeature('hdml');
$this->setFeature('wml');
if (strpos($this->_agent, 'GUI') !== false &&
strpos($this->_agent, 'UP.Link') !== false) {
/* The device accepts Openwave GUI extensions for
* WML 1.3. Non-UP.Link gateways sometimes have
* problems, so exclude them. */
$this->setQuirk('ow_gui_1.3');
}
$this->_mobile = true;
} elseif (strpos($this->_agent, 'Xiino/') !== false) {
$this->setBrowser('xiino');
$this->setFeature('hdml');
$this->setFeature('wml');
$this->_mobile = true;
} elseif (strpos($this->_agent, 'Palmscape/') !== false) {
$this->setBrowser('palmscape');
$this->setFeature('javascript', false);
$this->setFeature('hdml');
$this->setFeature('wml');
$this->_mobile = true;
} elseif (strpos($this->_agent, 'Nokia') !== false) {
$this->setBrowser('nokia');
$this->setFeature('html', false);
$this->setFeature('wml');
$this->setFeature('xhtml');
$this->_mobile = true;
} elseif (strpos($this->_agent, 'Ericsson') !== false) {
$this->setBrowser('ericsson');
$this->setFeature('html', false);
$this->setFeature('wml');
$this->_mobile = true;
} elseif (strpos($this->_lowerAgent, 'wap') !== false) {
$this->setBrowser('wap');
$this->setFeature('html', false);
$this->setFeature('javascript', false);
$this->setFeature('hdml');
$this->setFeature('wml');
$this->_mobile = true;
} elseif (strpos($this->_lowerAgent, 'docomo') !== false ||
strpos($this->_lowerAgent, 'portalmmm') !== false) {
$this->setBrowser('imode');
$this->setFeature('images', false);
$this->_mobile = true;
} elseif (strpos($this->_lowerAgent, 'j-') !== false) {
$this->setBrowser('mml');
$this->_mobile = true;
}
}
}
/**
* Match the platform of the browser.
*
* This is a pretty simplistic implementation, but it's intended
* to let us tell what line breaks to send, so it's good enough
* for its purpose.
*
* @access public
*
* @since Horde 2.2
*/
function _setPlatform()
{
if (strpos($this->_lowerAgent, 'wind') !== false) {
$this->_platform = 'win';
} elseif (strpos($this->_lowerAgent, 'mac') !== false) {
$this->_platform = 'mac';
} else {
$this->_platform = 'unix';
}
}
/**
* Return the currently matched platform.
*
* @return string The user's platform.
*
* @since Horde 2.2
*/
function getPlatform()
{
return $this->_platform;
}
/**
* Sets the current browser.
*
* @access public
*
* @param string $browser The browser to set as current.
*/
function setBrowser($browser)
{
$this->_browser = $browser;
}
/**
* Determine if the given browser is the same as the current.
*
* @access public
*
* @param string $browser The browser to check.
*
* @return boolean Is the given browser the same as the current?
*/
function isBrowser($browser)
{
return ($this->_browser === $browser);
}
/**
* Do we consider the current browser to be a mobile device?
*
* @return boolean True if we do, false if we don't.
*/
function isMobile()
{
return $this->_mobile;
}
/**
* Determines if the browser is a robot or not.
*
* @access public
*
* @return boolean True if browser is a known robot.
*/
function isRobot()
{
foreach ($this->_robots as $robot) {
if (strpos($this->_agent, $robot) !== false) {
return true;
}
}
return false;
}
/**
* Retrieve the current browser.
*
* @access public
*
* @return string The current browser.
*/
function getBrowser()
{
return $this->_browser;
}
/**
* Retrieve the current browser's major version.
*
* @access public
*
* @return integer The current browser's major version.
*/
function getMajor()
{
return $this->_majorVersion;
}
/**
* Retrieve the current browser's minor version.
*
* @access public
*
* @return integer The current browser's minor version.
*/
function getMinor()
{
return $this->_minorVersion;
}
/**
* Retrieve the current browser's version.
*
* @access public
*
* @return string The current browser's version.
*/
function getVersion()
{
return $this->_majorVersion . '.' . $this->_minorVersion;
}
/**
* Return the full browser agent string.
*
* @access public
*
* @return string The browser agent string.
*/
function getAgentString()
{
return $this->_agent;
}
/**
* Set unique behavior for the current browser.
*
* @access public
*
* @param string $quirk The behavior to set.
* @param optional string $value Special behavior parameter.
*/
function setQuirk($quirk, $value = true)
{
$this->_quirks[$quirk] = $value;
}
/**
* Check unique behavior for the current browser.
*
* @access public
*
* @param string $quirk The behavior to check.
*
* @return boolean Does the browser have the behavior set?
*/
function hasQuirk($quirk)
{
return !empty($this->_quirks[$quirk]);
}
/**
* Retreive unique behavior for the current browser.
*
* @access public
*
* @param string $quirk The behavior to retreive.
*
* @return string The value for the requested behavior.
*/
function getQuirk($quirk)
{
return isset($this->_quirks[$quirk])
? $this->_quirks[$quirk]
: null;
}
/**
* Set capabilities for the current browser.
*
* @access public
*
* @param string $feature The capability to set.
* @param optional string $value Special capability parameter.
*/
function setFeature($feature, $value = true)
{
$this->_features[$feature] = $value;
}
/**
* Check the current browser capabilities.
*
* @access public
*
* @param string $feature The capability to check.
*
* @return boolean Does the browser have the capability set?
*/
function hasFeature($feature)
{
return !empty($this->_features[$feature]);
}
/**
* Retreive the current browser capability.
*
* @access public
*
* @param string $feature The capability to retreive.
*
* @return string The value of the requested capability.
*/
function getFeature($feature)
{
return isset($this->_features[$feature])
? $this->_features[$feature]
: null;
}
/**
* Determine if we are using a secure (SSL) connection.
*
* @access public
*
* @return boolean True if using SSL, false if not.
*/
function usingSSLConnection()
{
return ((isset($_SERVER['HTTPS']) &&
($_SERVER['HTTPS'] == 'on')) ||
getenv('SSL_PROTOCOL_VERSION'));
}
/**
* Returns the server protocol in use on the current server.
*
* @access public
*
* @return string The HTTP server protocol version.
*/
function getHTTPProtocol()
{
if (isset($_SERVER['SERVER_PROTOCOL'])) {
if (($pos = strrpos($_SERVER['SERVER_PROTOCOL'], '/'))) {
return substr($_SERVER['SERVER_PROTOCOL'], $pos + 1);
}
}
return null;
}
/**
* Determine if files can be uploaded to the system.
*
* @access public
*
* @return integer If uploads allowed, returns the maximum size of the
* upload in bytes. Returns 0 if uploads are not
* allowed.
*/
function allowFileUploads()
{
if (ini_get('file_uploads')) {
if (($dir = ini_get('upload_tmp_dir')) &&
!is_writable($dir)) {
return 0;
}
$size = ini_get('upload_max_filesize');
switch (strtolower(substr($size, -1, 1))) {
case 'k':
$size = intval(floatval($size) * 1024);
break;
case 'm':
$size = intval(floatval($size) * 1024 * 1024);
break;
default:
$size = intval($size);
break;
}
return $size;
} else {
return 0;
}
}
/**
* Determines if the file was uploaded or not. If not, will return the
* appropriate error message.
*
* @access public
*
* @param string $field The name of the field containing the
* uploaded file.
* @param optional string $name The file description string to use in the
* error message. Default: 'file'.
*
* @return mixed True on success, PEAR_Error on error.
*/
function wasFileUploaded($field, $name = null)
{
require_once 'PEAR.php';
if (is_null($name)) {
$name = _("file");
}
if (!($uploadSize = Browser::allowFileUploads())) {
return PEAR::raiseError(_("File uploads not supported."));
}
/* Get any index on the field name. */
require_once 'Horde/Array.php';
$index = Horde_Array::getArrayParts($field, $base, $keys);
if ($index) {
/* Index present, fetch the error var to check. */
$keys_path = array_merge(array($base, 'error'), $keys);
$error = Horde_Array::getElement($_FILES, $keys_path);
/* Index present, fetch the tmp_name var to check. */
$keys_path = array_merge(array($base, 'tmp_name'), $keys);
$tmp_name = Horde_Array::getElement($_FILES, $keys_path);
} else {
/* No index, simple set up of vars to check. */
if (!isset($_FILES[$field])) {
return PEAR::raiseError(_("No file uploaded"), UPLOAD_ERR_NO_FILE);
}
$error = $_FILES[$field]['error'];
$tmp_name = $_FILES[$field]['tmp_name'];
}
if (!isset($_FILES) || ($error == UPLOAD_ERR_NO_FILE)) {
return PEAR::raiseError(sprintf(_("There was a problem with the file upload: No %s was uploaded."), $name), UPLOAD_ERR_NO_FILE);
} elseif (($error == UPLOAD_ERR_OK) && is_uploaded_file($tmp_name)) {
return true;
} elseif (($error == UPLOAD_ERR_INI_SIZE) ||
($error == UPLOAD_ERR_FORM_SIZE)) {
return PEAR::raiseError(sprintf(_("There was a problem with the file upload: The %s was larger than the maximum allowed size (%d bytes)."), $name, $uploadSize), $error);
} elseif ($error == UPLOAD_ERR_PARTIAL) {
return PEAR::raiseError(sprintf(_("There was a problem with the file upload: The %s was only partially uploaded."), $name), $error);
}
}
/**
* Returns the headers for a browser download.
*
* @access public
*
* @param optional string $filename The filename of the download.
* @param optional string $cType The content-type description of the
* file.
* @param optional boolean $inline True if inline, false if attachment.
* @param optional string $cLength The content-length of this file.
*
* @since Horde 2.2
*/
function downloadHeaders($filename = 'unknown', $cType = null,
$inline = false, $cLength = null)
{
/* Some browsers don't like spaces in the filename. */
if ($this->hasQuirk('no_filename_spaces')) {
$filename = strtr($filename, ' ', '_');
}
/* MSIE doesn't like multiple periods in the file name. Convert
all periods (except the last one) to underscores. */
if ($this->isBrowser('msie')) {
if (($pos = strrpos($filename, '.'))) {
$filename = strtr(substr($filename, 0, $pos), '.', '_') . substr($filename, $pos);
}
}
/* Content-Type/Content-Disposition Header. */
if ($inline) {
if (!is_null($cType)) {
header('Content-Type: ' . trim($cType));
} elseif ($this->isBrowser('msie')) {
header('Content-Type: application/x-msdownload');
} else {
header('Content-Type: application/octet-stream');
}
header('Content-Disposition: inline; filename="' . $filename . '"');
} else {
if ($this->isBrowser('msie')) {
header('Content-Type: application/x-msdownload');
} elseif (!is_null($cType)) {
header('Content-Type: ' . trim($cType));
} else {
header('Content-Type: application/octet-stream');
}
if ($this->hasQuirk('break_disposition_header')) {
header('Content-Disposition: filename="' . $filename . '"');
} else {
header('Content-Disposition: attachment; filename="' . $filename . '"');
}
}
/* Content-Length Header. Don't send Content-Length for
* HTTP/1.1 servers. */
if (($this->getHTTPProtocol() != '1.1') && !is_null($cLength)) {
header('Content-Length: ' . $cLength);
}
/* Overwrite Pragma: and other caching headers for IE. */
if ($this->hasQuirk('cache_ssl_downloads')) {
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
}
}
/**
* Determines if a browser can display a given MIME type.
*
* @access public
*
* @param string $mimetype The MIME type to check.
*
* @return boolean True if the browser can display the MIME type.
*/
function isViewable($mimetype)
{
$mimetype = String::lower($mimetype);
list($type, $subtype) = explode('/', $mimetype);
if (!empty($this->_accept)) {
$wildcard_match = false;
if (strpos($this->_accept, $mimetype) !== false) {
return true;
}
if (strpos($this->_accept, '*/*') !== false) {
$wildcard_match = true;
if ($type != 'image') {
return true;
}
}
/* image/jpeg and image/pjpeg *appear* to be the same
* entity, but Mozilla doesn't seem to want to accept the
* latter. For our purposes, we will treat them the
* same. */
if ($this->isBrowser('mozilla') &&
($mimetype == 'image/pjpeg') &&
(strpos($this->_accept, 'image/jpeg') !== false)) {
return true;
}
if (!$wildcard_match) {
return false;
}
}
if (!$this->hasFeature('images') || ($type != 'image')) {
return false;
}
return (in_array($subtype, $this->_images));
}
/**
* Escape characters in javascript code if the browser requires it.
* %23, %26, and %2B (for IE) and %27 need to be escaped or else
* jscript will interpret it as a single quote, pound sign, or
* ampersand and refuse to work.
*
* @access public
*
* @param string $code The JS code to escape.
*
* @return string The escaped code.
*/
function escapeJSCode($code)
{
$from = $to = array();
if ($this->isBrowser('msie') ||
($this->isBrowser('mozilla') && ($this->getMajor() >= 5))) {
$from = array('%23', '%26', '%2B');
$to = array(urlencode('%23'), urlencode('%26'), urlencode('%2B'));
}
$from[] = '%27';
$to[] = '\%27';
return str_replace($from, $to, $code);
}
/**
* Set the IE version in the session.
*
* @access public
*
* @param string $ver The IE Version string.
*/
function setIEVersion($ver)
{
$_SESSION['__browser'] = array(
'ie_version' => $ver
);
}
/**
* Return the IE version stored in the session, if available.
*
* @access public
*
* @return mixed The IE Version string or null if no string is stored.
*/
function getIEVersion()
{
return isset($_SESSION['__browser']['ie_version']) ? $_SESSION['__browser']['ie_version'] : null;
}
}
Reference in New Issue Copy Permalink