mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-08-30 14:36:06 +02:00
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@56212 467b73ca-7a2a-4603-9d3b-597d59a354a9
111 lines
3.4 KiB
PHP
Executable File
111 lines
3.4 KiB
PHP
Executable File
<?php
|
|
/**
|
|
* The content negotiator performs text/html or application/xhtml+xml switching.
|
|
* It does this through the static function ContentNegotiator::process()
|
|
*
|
|
* @todo Improve documentation
|
|
* @package sapphire
|
|
* @subpackage control
|
|
*/
|
|
class ContentNegotiator {
|
|
protected static $encoding = 'utf-8';
|
|
|
|
/**
|
|
* Set the character set encoding for this page. By default it's utf-8, but you could change it to, say, windows-1252, to
|
|
* improve interoperability with extended characters being imported from windows excel.
|
|
*/
|
|
static function set_encoding($encoding) {
|
|
self::$encoding = $encoding;
|
|
}
|
|
/**
|
|
* Return the character encoding set bhy ContentNegotiator::set_encoding(). It's recommended that all classes that need to
|
|
* specify the character set make use of this function.
|
|
*/
|
|
static function get_encoding() {
|
|
return self::$encoding;
|
|
}
|
|
|
|
|
|
static function process(HTTPResponse $response) {
|
|
if(self::$disabled) return;
|
|
|
|
$mimes = array(
|
|
"xhtml" => "application/xhtml+xml",
|
|
"html" => "text/html",
|
|
);
|
|
$q = array();
|
|
if(headers_sent()) {
|
|
$chosenFormat = "html";
|
|
|
|
} else if(isset($_GET['forceFormat'])) {
|
|
$chosenFormat = $_GET['forceFormat'];
|
|
|
|
} else {
|
|
// The W3C validator doesn't send an HTTP_ACCEPT header, but it can support xhtml. We put this special case in here so that
|
|
// designers don't get worried that their templates are HTML4.
|
|
if(isset($_SERVER['HTTP_USER_AGENT']) && substr($_SERVER['HTTP_USER_AGENT'], 0, 14) == 'W3C_Validator/') {
|
|
$chosenFormat = "xhtml";
|
|
|
|
} else {
|
|
foreach($mimes as $format => $mime) {
|
|
$regExp = '/' . str_replace(array('+','/'),array('\+','\/'), $mime) . '(;q=(\d+\.\d+))?/i';
|
|
if (isset($_SERVER['HTTP_ACCEPT']) && preg_match($regExp, $_SERVER['HTTP_ACCEPT'], $matches)) {
|
|
$preference = isset($matches[2]) ? $matches[2] : 1;
|
|
if(!isset($q[$preference])) $q[$preference] = $format;
|
|
}
|
|
}
|
|
|
|
if($q) {
|
|
// Get the preferred format
|
|
krsort($q);
|
|
$chosenFormat = reset($q);
|
|
} else {
|
|
$chosenFormat = "html";
|
|
}
|
|
}
|
|
}
|
|
|
|
$negotiator = new ContentNegotiator();
|
|
$negotiator->$chosenFormat( $response );
|
|
}
|
|
|
|
function xhtml(HTTPResponse $response) {
|
|
$content = $response->getBody();
|
|
|
|
// Only serve "pure" XHTML if the XML header is present
|
|
if(substr($content,0,5) == '<' . '?xml' ) {
|
|
$response->addHeader("Content-type", "application/xhtml+xml; charset=" . self::$encoding);
|
|
$response->addHeader("Vary" , "Accept");
|
|
|
|
$content = str_replace(' ',' ', $content);
|
|
$content = str_replace('<br>','<br />', $content);
|
|
$content = eregi_replace('(<img[^>]*[^/>])>','\\1/>', $content);
|
|
|
|
$response->setBody($content);
|
|
|
|
} else {
|
|
return $this->html($response);
|
|
}
|
|
}
|
|
function html(HTTPResponse $response) {
|
|
$response->addHeader("Content-type", "text/html; charset=" . self::$encoding);
|
|
$response->addHeader("Vary", "Accept");
|
|
|
|
$content = $response->getBody();
|
|
|
|
$content = ereg_replace("<\\?xml[^>]+\\?>\n?",'',$content);
|
|
$content = str_replace(array('/>','xml:lang','application/xhtml+xml'),array('>','lang','text/html'), $content);
|
|
$content = ereg_replace('<!DOCTYPE[^>]+>', '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">', $content);
|
|
$content = ereg_replace('<html xmlns="[^"]+"','<html ', $content);
|
|
|
|
$response->setBody($content);
|
|
}
|
|
|
|
protected static $disabled;
|
|
static function disable() {
|
|
self::$disabled = true;
|
|
}
|
|
}
|
|
|
|
?>
|