interface/modules/zend_modules/library/Zend/Http/Header/Upgrade.php

   1 <?php
   2 /**
   3  * Zend Framework (http://framework.zend.com/)
   4  *
   5  * @link      http://github.com/zendframework/zf2 for the canonical source repository
   6  * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
   7  * @license   http://framework.zend.com/license/new-bsd New BSD License
   8  */
   9
  10 namespace Zend\Http\Header;
  11
  12 /**
  13  * @throws Exception\InvalidArgumentException
  14  * @see http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.42
  15  */
  16 class Upgrade implements HeaderInterface
  17 {
  18     /**
  19      * @var string
  20      */
  21     protected $value;
  22
  23     public static function fromString($headerLine)
  24     {
  25         list($name, $value) = GenericHeader::splitHeaderLine($headerLine);
  26
  27         // check to ensure proper header type for this factory
  28         if (strtolower($name) !== 'upgrade') {
  29             throw new Exception\InvalidArgumentException('Invalid header line for Upgrade string: "' . $name . '"');
  30         }
  31
  32         // @todo implementation details
  33         $header = new static($value);
  34
  35         return $header;
  36     }
  37
  38     public function __construct($value = null)
  39     {
  40         if ($value) {
  41             HeaderValue::assertValid($value);
  42             $this->value = $value;
  43         }
  44     }
  45
  46     public function getFieldName()
  47     {
  48         return 'Upgrade';
  49     }
  50
  51     public function getFieldValue()
  52     {
  53         return $this->value;
  54     }
  55
  56     public function toString()
  57     {
  58         return 'Upgrade: ' . $this->getFieldValue();
  59     }
  60 }