165 lines
4.0 KiB
PHP
165 lines
4.0 KiB
PHP
<?php
|
|
|
|
/*
|
|
* This file is part of SwiftMailer.
|
|
* (c) 2004-2009 Chris Corbyn
|
|
*
|
|
* For the full copyright and license information, please view the LICENSE
|
|
* file that was distributed with this source code.
|
|
*/
|
|
|
|
/**
|
|
* Provides the base functionality for an InputStream supporting filters.
|
|
* @package Swift
|
|
* @subpackage ByteStream
|
|
* @author Chris Corbyn
|
|
*/
|
|
abstract class Swift_ByteStream_AbstractFilterableInputStream implements Swift_InputByteStream, Swift_Filterable
|
|
{
|
|
/** Write sequence */
|
|
protected $_sequence = 0;
|
|
|
|
/** StreamFilters */
|
|
private $_filters = array();
|
|
|
|
/** A buffer for writing */
|
|
private $_writeBuffer = '';
|
|
|
|
/** Bound streams */
|
|
private $_mirrors = array();
|
|
|
|
/**
|
|
* Commit the given bytes to the storage medium immediately.
|
|
* @param string $bytes
|
|
* @access protected
|
|
*/
|
|
abstract protected function _commit($bytes);
|
|
|
|
/**
|
|
* Flush any buffers/content with immediate effect.
|
|
* @access protected
|
|
*/
|
|
abstract protected function _flush();
|
|
|
|
/**
|
|
* Add a StreamFilter to this InputByteStream.
|
|
* @param Swift_StreamFilter $filter
|
|
* @param string $key
|
|
*/
|
|
public function addFilter(Swift_StreamFilter $filter, $key)
|
|
{
|
|
$this->_filters[$key] = $filter;
|
|
}
|
|
|
|
/**
|
|
* Remove an already present StreamFilter based on its $key.
|
|
* @param string $key
|
|
*/
|
|
public function removeFilter($key)
|
|
{
|
|
unset($this->_filters[$key]);
|
|
}
|
|
|
|
/**
|
|
* Writes $bytes to the end of the stream.
|
|
* @param string $bytes
|
|
* @throws Swift_IoException
|
|
*/
|
|
public function write($bytes)
|
|
{
|
|
$this->_writeBuffer .= $bytes;
|
|
foreach ($this->_filters as $filter) {
|
|
if ($filter->shouldBuffer($this->_writeBuffer)) {
|
|
return;
|
|
}
|
|
}
|
|
$this->_doWrite($this->_writeBuffer);
|
|
|
|
return ++$this->_sequence;
|
|
}
|
|
|
|
/**
|
|
* For any bytes that are currently buffered inside the stream, force them
|
|
* off the buffer.
|
|
*
|
|
* @throws Swift_IoException
|
|
*/
|
|
public function commit()
|
|
{
|
|
$this->_doWrite($this->_writeBuffer);
|
|
}
|
|
|
|
/**
|
|
* Attach $is to this stream.
|
|
* The stream acts as an observer, receiving all data that is written.
|
|
* All {@link write()} and {@link flushBuffers()} operations will be mirrored.
|
|
*
|
|
* @param Swift_InputByteStream $is
|
|
*/
|
|
public function bind(Swift_InputByteStream $is)
|
|
{
|
|
$this->_mirrors[] = $is;
|
|
}
|
|
|
|
/**
|
|
* Remove an already bound stream.
|
|
* If $is is not bound, no errors will be raised.
|
|
* If the stream currently has any buffered data it will be written to $is
|
|
* before unbinding occurs.
|
|
*
|
|
* @param Swift_InputByteStream $is
|
|
*/
|
|
public function unbind(Swift_InputByteStream $is)
|
|
{
|
|
foreach ($this->_mirrors as $k => $stream) {
|
|
if ($is === $stream) {
|
|
if ($this->_writeBuffer !== '') {
|
|
$stream->write($this->_filter($this->_writeBuffer));
|
|
}
|
|
unset($this->_mirrors[$k]);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Flush the contents of the stream (empty it) and set the internal pointer
|
|
* to the beginning.
|
|
* @throws Swift_IoException
|
|
*/
|
|
public function flushBuffers()
|
|
{
|
|
if ($this->_writeBuffer !== '') {
|
|
$this->_doWrite($this->_writeBuffer);
|
|
}
|
|
$this->_flush();
|
|
|
|
foreach ($this->_mirrors as $stream) {
|
|
$stream->flushBuffers();
|
|
}
|
|
}
|
|
|
|
// -- Private methods
|
|
|
|
/** Run $bytes through all filters */
|
|
private function _filter($bytes)
|
|
{
|
|
foreach ($this->_filters as $filter) {
|
|
$bytes = $filter->filter($bytes);
|
|
}
|
|
|
|
return $bytes;
|
|
}
|
|
|
|
/** Just write the bytes to the stream */
|
|
private function _doWrite($bytes)
|
|
{
|
|
$this->_commit($this->_filter($bytes));
|
|
|
|
foreach ($this->_mirrors as $stream) {
|
|
$stream->write($bytes);
|
|
}
|
|
|
|
$this->_writeBuffer = '';
|
|
}
|
|
}
|