[Summary view]

Differences Between: [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403]

   1  <?php
   2  /**
   3   * Copyright 2012-2017 Horde LLC (http://www.horde.org/)
   4   *
   5   * See the enclosed file LICENSE for license information (BSD). If you
   6   * did not receive this file, see http://www.horde.org/licenses/bsd.
   7   *
   8   * @category  Horde
   9   * @copyright 2012-2017 Horde LLC
  10   * @license   http://www.horde.org/licenses/bsd New BSD License
  11   * @package   Mail
  12   */
  13  
  14  /**
  15   * Class to parse identification headers (RFC 5322 [3.6.4]): Message-ID,
  16   * References, and In-Reply-To.
  17   *
  18   * @author    Michael Slusarz <slusarz@horde.org>
  19   * @category  Horde
  20   * @copyright 2012-2017 Horde LLC
  21   * @license   http://www.horde.org/licenses/bsd New BSD License
  22   * @package   Mail
  23   * @since     2.2.0
  24   */
  25  class Horde_Mail_Rfc822_Identification extends Horde_Mail_Rfc822
  26  {
  27      /**
  28       * List of message IDs parsed.
  29       *
  30       * @var array
  31       */
  32      public $ids = array();
  33  
  34      /**
  35       * Constructor.
  36       *
  37       * @param string $value  Identification field value to parse.
  38       */
  39      public function __construct($value = null)
  40      {
  41          $this->parse($value);
  42      }
  43  
  44      /**
  45       * Parse an identification header.
  46       *
  47       * @param string $value  Identification field value to parse.
  48       */
  49      public function parse($value)
  50      {
  51          if (!strlen($value)) {
  52              return;
  53          }
  54  
  55          $this->_data = $value;
  56          $this->_datalen = strlen($value);
  57          $this->_params['validate'] = true;
  58          $this->_ptr = 0;
  59  
  60          $this->_rfc822SkipLwsp();
  61  
  62          while ($this->_curr() !== false) {
  63              try {
  64                  $this->ids[] = $this->_parseMessageId();
  65              } catch (Horde_Mail_Exception $e) {
  66                  break;
  67              }
  68  
  69              // Some mailers incorrectly insert commas between reference items
  70              if ($this->_curr() == ',') {
  71                  $this->_rfc822SkipLwsp(true);
  72              }
  73          }
  74      }
  75  
  76      /**
  77       * Message IDs are defined in RFC 5322 [3.6.4]. In short, they can only
  78       * contain one '@' character. However, Outlook can produce invalid
  79       * Message-IDs containing multiple '@' characters, which will fail the
  80       * strict RFC checks.
  81       *
  82       * Since we don't care about the structure/details of the Message-ID,
  83       * just do a basic parse that considers all characters inside of angled
  84       * brackets to be valid.
  85       *
  86       * @return string  A full Message-ID (enclosed in angled brackets).
  87       *
  88       * @throws Horde_Mail_Exception
  89       */
  90      private function _parseMessageId()
  91      {
  92          $bracket = ($this->_curr(true) === '<');
  93          $str = '<';
  94  
  95          while (($chr = $this->_curr(true)) !== false) {
  96              if ($bracket) {
  97                  $str .= $chr;
  98                  if ($chr == '>') {
  99                      $this->_rfc822SkipLwsp();
 100                      return $str;
 101                  }
 102              } else {
 103                  if (!strcspn($chr, " \n\r\t,")) {
 104                      $this->_rfc822SkipLwsp();
 105                      return $str;
 106                  }
 107                  $str .= $chr;
 108              }
 109          }
 110  
 111          if (!$bracket) {
 112              return $str;
 113          }
 114  
 115          throw new Horde_Mail_Exception('Invalid Message-ID.');
 116      }
 117  
 118  }