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<?php
/**
* Slim - a micro PHP 5 framework
*
* @author Josh Lockhart <info@slimframework.com>
* @copyright 2011 Josh Lockhart
* @link http://www.slimframework.com
* @license http://www.slimframework.com/license
* @version 2.6.1
* @package Slim
*
* MIT LICENSE
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
namespace Slim\Http;
/**
* HTTP Headers
*
* @package Slim
* @author Josh Lockhart
* @since 1.6.0
*/
class Headers extends \Slim\Helper\Set
{
/********************************************************************************
* Static interface
*******************************************************************************/
/**
* Special-case HTTP headers that are otherwise unidentifiable as HTTP headers.
* Typically, HTTP headers in the $_SERVER array will be prefixed with
* `HTTP_` or `X_`. These are not so we list them here for later reference.
*
* @var array
*/
protected static $special = array(
'CONTENT_TYPE',
'CONTENT_LENGTH',
'PHP_AUTH_USER',
'PHP_AUTH_PW',
'PHP_AUTH_DIGEST',
'AUTH_TYPE'
);
/**
* Extract HTTP headers from an array of data (e.g. $_SERVER)
* @param array $data
* @return array
*/
public static function extract($data)
{
$results = array();
foreach ($data as $key => $value) {
$key = strtoupper($key);
if (strpos($key, 'X_') === 0 || strpos($key, 'HTTP_') === 0 || in_array($key, static::$special)) {
if ($key === 'HTTP_CONTENT_LENGTH') {
continue;
}
$results[$key] = $value;
}
}
return $results;
}
/********************************************************************************
* Instance interface
*******************************************************************************/
/**
* Transform header name into canonical form
* @param string $key
* @return string
*/
protected function normalizeKey($key)
{
$key = strtolower($key);
$key = str_replace(array('-', '_'), ' ', $key);
$key = preg_replace('#^http #', '', $key);
$key = ucwords($key);
$key = str_replace(' ', '-', $key);
return $key;
}
}
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