nextcloud/inc/HTTP/WebDAV/Tools/_parse_propfind.php

192 lines
5.8 KiB
PHP
Executable File

<?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 PROPFIND request bodies
*
* @package HTTP_WebDAV_Server
* @author Hartmut Holzgraefe <hholzgra@php.net>
* @version @package-version@
*/
class _parse_propfind
{
/**
* success state flag
*
* @var bool
* @access public
*/
var $success = false;
/**
* found properties are collected here
*
* @var array
* @access public
*/
var $props = false;
/**
* internal tag nesting depth counter
*
* @var int
* @access private
*/
var $depth = 0;
/**
* constructor
*
* @access public
*/
function _parse_propfind($path)
{
// success state flag
$this->success = true;
// property storage array
$this->props = array();
// internal tag depth counter
$this->depth = 0;
// remember if any input was parsed
$had_input = false;
// open input stream
$f_in = fopen($path, "r");
if (!$f_in) {
$this->success = false;
return;
}
// create XML 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"));
// 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);
}
// free parser
xml_parser_free($xml_parser);
// close input stream
fclose($f_in);
// if no input was parsed it was a request
if(!count($this->props)) $this->props = "all"; // default
}
/**
* start tag handler
*
* @access private
* @param resource parser
* @param string tag name
* @param array tag attributes
*/
function _startElement($parser, $name, $attrs)
{
// name space handling
if (strstr($name, " ")) {
list($ns, $tag) = explode(" ", $name);
if ($ns == "")
$this->success = false;
} else {
$ns = "";
$tag = $name;
}
// special tags at level 1: <allprop> and <propname>
if ($this->depth == 1) {
if ($tag == "allprop")
$this->props = "all";
if ($tag == "propname")
$this->props = "names";
}
// requested properties are found at level 2
if ($this->depth == 2) {
$prop = array("name" => $tag);
if ($ns)
$prop["xmlns"] = $ns;
$this->props[] = $prop;
}
// increment depth count
$this->depth++;
}
/**
* end tag handler
*
* @access private
* @param resource parser
* @param string tag name
*/
function _endElement($parser, $name)
{
// here we only need to decrement the depth count
$this->depth--;
}
}
?>