1 <?php

     2 

     3 /*

     4  * This file is part of SwiftMailer.

     5  * (c) 2004-2009 Chris Corbyn

     6  *

     7  * For the full copyright and license information, please view the LICENSE

     8  * file that was distributed with this source code.

     9  */

    10 

    11 

    12 /**

    13  * Handles Quoted Printable (QP) Transfer Encoding in Swift Mailer.

    14  * @package Swift

    15  * @subpackage Mime

    16  * @author Chris Corbyn

    17  */

    18 class Swift_Mime_ContentEncoder_QpContentEncoder extends Swift_Encoder_QpEncoder

    19   implements Swift_Mime_ContentEncoder

    20 {

    21 

    22   /**

    23    * Creates a new QpContentEncoder for the given CharacterStream.

    24    * @param Swift_CharacterStream $charStream to use for reading characters

    25    * @param Swift_StreamFilter $filter if canonicalization should occur

    26    * @param boolean $dotEscape if dot stuffing workaround must be enabled

    27    */

    28   public function __construct(Swift_CharacterStream $charStream,

    29     Swift_StreamFilter $filter = null, $dotEscape=false)

    30   {

    31     parent::__construct($charStream, $filter);

    32     if ($dotEscape) {

    33       /* Encode . as =2e for buggy remote servers */

    34       unset($this->_safeMap[0x2e]);

    35     }

    36   }

    37 

    38   /**

    39    * Encode stream $in to stream $out.

    40    * QP encoded strings have a maximum line length of 76 characters.

    41    * If the first line needs to be shorter, indicate the difference with

    42    * $firstLineOffset.

    43    * @param Swift_OutputByteStream $os output stream

    44    * @param Swift_InputByteStream $is input stream

    45    * @param int $firstLineOffset

    46    * @param int $maxLineLength

    47    */

    48   public function encodeByteStream(

    49     Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0,

    50     $maxLineLength = 0)

    51   {

    52     if ($maxLineLength > 76 || $maxLineLength <= 0)

    53     {

    54       $maxLineLength = 76;

    55     }

    56 

    57     $thisLineLength = $maxLineLength - $firstLineOffset;

    58 

    59     $this->_charStream->flushContents();

    60     $this->_charStream->importByteStream($os);

    61     

    62     $currentLine = '';

    63     $prepend = '';

    64     $size=$lineLen=0;

    65 

    66     while (false !== $bytes = $this->_nextSequence())

    67     {

    68       //If we're filtering the input

    69       if (isset($this->_filter))

    70       {

    71         //If we can't filter because we need more bytes

    72         while ($this->_filter->shouldBuffer($bytes))

    73         {

    74           //Then collect bytes into the buffer

    75           if (false === $moreBytes = $this->_nextSequence(1))

    76           {

    77             break;

    78           }

    79 

    80           foreach ($moreBytes as $b)

    81           {

    82             $bytes[] = $b;

    83           }

    84         }

    85         //And filter them

    86         $bytes = $this->_filter->filter($bytes);

    87       }

    88 

    89       $enc = $this->_encodeByteSequence($bytes, $size);

    90       if ($currentLine && $lineLen+$size >= $thisLineLength)

    91       {

    92         $is->write($prepend . $this->_standardize($currentLine));

    93         $currentLine = '';

    94         $prepend = "=\r\n";

    95         $thisLineLength = $maxLineLength;

    96         $lineLen=0;

    97       }

    98       $lineLen+=$size;

    99       $currentLine .= $enc;

   100     }

   101     if (strlen($currentLine))

   102     {

   103       $is->write($prepend . $this->_standardize($currentLine));

   104     }

   105   }

   106 

   107   /**

   108    * Get the name of this encoding scheme.

   109    * Returns the string 'quoted-printable'.

   110    * @return string

   111    */

   112   public function getName()

   113   {

   114     return 'quoted-printable';

   115   }

   116 

   117 }