121 lines
3.4 KiB
PHP
121 lines
3.4 KiB
PHP
<?php
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/**
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* Copyright 2012-2017 Horde LLC (http://www.horde.org/)
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*
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* See the enclosed file COPYING for license information (LGPL). If you
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* did not receive this file, see http://www.horde.org/licenses/lgpl21.
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*
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* @category Horde
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* @copyright 2012-2017 Horde LLC
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* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
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* @package Imap_Client
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*/
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/**
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* Stream filter to analyze an IMAP string to determine how to send to the
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* server.
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*
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* @author Michael Slusarz <slusarz@horde.org>
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* @category Horde
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* @copyright 2012-2017 Horde LLC
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* @license http://www.horde.org/licenses/lgpl21 LGPL 2.1
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* @package Imap_Client
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*/
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class Horde_Imap_Client_Data_Format_Filter_String extends php_user_filter
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{
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/**
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* Skip status.
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*
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* @var boolean
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*/
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protected $_skip = false;
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/**
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* @see stream_filter_register()
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*/
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public function onCreate()
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{
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$this->params->binary = false;
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$this->params->literal = false;
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$this->params->nonascii = false;
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// no_quote_list is used below as a config option
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$this->params->quoted = false;
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return true;
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}
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/**
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* @see stream_filter_register()
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*/
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public function filter($in, $out, &$consumed, $closing)
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{
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$p = $this->params;
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while ($bucket = stream_bucket_make_writeable($in)) {
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if (!$this->_skip) {
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$len = $bucket->datalen;
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$str = $bucket->data;
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for ($i = 0; $i < $len; ++$i) {
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$chr = ord($str[$i]);
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switch ($chr) {
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case 0: // null
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$p->binary = true;
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$p->literal = true;
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// No need to scan input anymore.
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$this->_skip = true;
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break 2;
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case 10: // LF
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case 13: // CR
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$p->literal = true;
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break;
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case 32: // SPACE
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case 34: // "
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case 40: // (
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case 41: // )
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case 92: // \
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case 123: // {
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case 127: // DEL
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// These are all invalid ATOM characters.
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$p->quoted = true;
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break;
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case 37: // %
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case 42: // *
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// These are not quoted if being used as wildcards.
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if (empty($p->no_quote_list)) {
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$p->quoted = true;
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}
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break;
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default:
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if ($chr < 32) {
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// CTL characters must be, at a minimum, quoted.
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$p->quoted = true;
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} elseif ($chr > 127) {
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$p->nonascii = true;
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// 8-bit chars must be in a literal.
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$p->literal = true;
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}
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break;
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}
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}
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}
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$consumed += $bucket->datalen;
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stream_bucket_append($out, $bucket);
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}
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if ($p->literal) {
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$p->quoted = false;
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}
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return PSFS_PASS_ON;
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}
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}
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