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|
<?php // $Id$
/*
+----------------------------------------------------------------------+
| Copyright (c) 2002-2007 Christian Stocker, Hartmut Holzgraefe |
| All rights reserved |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| 2. Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in |
| the documentation and/or other materials provided with the |
| distribution. |
| 3. The names of the authors may not be used to endorse or promote |
| products derived from this software without specific prior |
| written permission. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| POSSIBILITY OF SUCH DAMAGE. |
+----------------------------------------------------------------------+
*/
/**
* helper class for parsing LOCK request bodies
*
* @package HTTP_WebDAV_Server
* @author Hartmut Holzgraefe <hholzgra@php.net>
* @version @package-version@
*/
class _parse_lockinfo
{
/**
* success state flag
*
* @var bool
* @access public
*/
var $success = false;
/**
* lock type, currently only "write"
*
* @var string
* @access public
*/
var $locktype = "";
/**
* lock scope, "shared" or "exclusive"
*
* @var string
* @access public
*/
var $lockscope = "";
/**
* lock owner information
*
* @var string
* @access public
*/
var $owner = "";
/**
* flag that is set during lock owner read
*
* @var bool
* @access private
*/
var $collect_owner = false;
/**
* constructor
*
* @param string path of stream to read
* @access public
*/
function _parse_lockinfo($path)
{
// we assume success unless problems occur
$this->success = true;
// remember if any input was parsed
$had_input = false;
// open stream
$f_in = fopen($path, "r");
if (!$f_in) {
$this->success = false;
return;
}
// create namespace aware parser
$xml_parser = xml_parser_create_ns("UTF-8", " ");
// set tag and data handlers
xml_set_element_handler($xml_parser,
array(&$this, "_startElement"),
array(&$this, "_endElement"));
xml_set_character_data_handler($xml_parser,
array(&$this, "_data"));
// we want a case sensitive parser
xml_parser_set_option($xml_parser,
XML_OPTION_CASE_FOLDING, false);
// parse input
while ($this->success && !feof($f_in)) {
$line = fgets($f_in);
if (is_string($line)) {
$had_input = true;
$this->success &= xml_parse($xml_parser, $line, false);
}
}
// finish parsing
if ($had_input) {
$this->success &= xml_parse($xml_parser, "", true);
}
// check if required tags where found
$this->success &= !empty($this->locktype);
$this->success &= !empty($this->lockscope);
// free parser resource
xml_parser_free($xml_parser);
// close input stream
fclose($f_in);
}
/**
* tag start handler
*
* @param resource parser
* @param string tag name
* @param array tag attributes
* @return void
* @access private
*/
function _startElement($parser, $name, $attrs)
{
// namespace handling
if (strstr($name, " ")) {
list($ns, $tag) = explode(" ", $name);
} else {
$ns = "";
$tag = $name;
}
if ($this->collect_owner) {
// everything within the <owner> tag needs to be collected
$ns_short = "";
$ns_attr = "";
if ($ns) {
if ($ns == "DAV:") {
$ns_short = "D:";
} else {
$ns_attr = " xmlns='$ns'";
}
}
$this->owner .= "<$ns_short$tag$ns_attr>";
} else if ($ns == "DAV:") {
// parse only the essential tags
switch ($tag) {
case "write":
$this->locktype = $tag;
break;
case "exclusive":
case "shared":
$this->lockscope = $tag;
break;
case "owner":
$this->collect_owner = true;
break;
}
}
}
/**
* data handler
*
* @param resource parser
* @param string data
* @return void
* @access private
*/
function _data($parser, $data)
{
// only the <owner> tag has data content
if ($this->collect_owner) {
$this->owner .= $data;
}
}
/**
* tag end handler
*
* @param resource parser
* @param string tag name
* @return void
* @access private
*/
function _endElement($parser, $name)
{
// namespace handling
if (strstr($name, " ")) {
list($ns, $tag) = explode(" ", $name);
} else {
$ns = "";
$tag = $name;
}
// <owner> finished?
if (($ns == "DAV:") && ($tag == "owner")) {
$this->collect_owner = false;
}
// within <owner> we have to collect everything
if ($this->collect_owner) {
$ns_short = "";
$ns_attr = "";
if ($ns) {
if ($ns == "DAV:") {
$ns_short = "D:";
} else {
$ns_attr = " xmlns='$ns'";
}
}
$this->owner .= "</$ns_short$tag$ns_attr>";
}
}
}
?>
|
