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286 lines
9.1 KiB
PHP
286 lines
9.1 KiB
PHP
<?php // $Id: _parse_propfind.php 246152 2007-11-14 10:49:27Z hholzgra $
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/*
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+----------------------------------------------------------------------+
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| Copyright (c) 2002-2007 Christian Stocker, Hartmut Holzgraefe |
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| All rights reserved |
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| Redistribution and use in source and binary forms, with or without |
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| modification, are permitted provided that the following conditions |
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| are met: |
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| |
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| 1. Redistributions of source code must retain the above copyright |
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| notice, this list of conditions and the following disclaimer. |
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| 2. Redistributions in binary form must reproduce the above copyright |
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| notice, this list of conditions and the following disclaimer in |
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| the documentation and/or other materials provided with the |
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| distribution. |
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| 3. The names of the authors may not be used to endorse or promote |
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| products derived from this software without specific prior |
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| written permission. |
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| |
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| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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| "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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| LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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| FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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| COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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| BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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| CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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| ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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| POSSIBILITY OF SUCH DAMAGE. |
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+----------------------------------------------------------------------+
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*/
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/**
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* helper class for parsing PROPFIND request bodies
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*
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* @package HTTP_WebDAV_Server
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* @author Hartmut Holzgraefe <hholzgra@php.net>
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* @version @package-version@
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*/
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class _parse_propfind
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{
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/**
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* success state flag
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*
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* @var bool
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* @access public
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*/
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var $success = false;
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/**
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* found properties are collected here
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*
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* @var array
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* @access public
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*/
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var $props = false;
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/**
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* found (CalDAV) filters are collected here
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*
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* @var array
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* @access public
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*/
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var $filters = false;
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/**
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* found other tags, eg. CalDAV calendar-multiget href's
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*
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* @var array
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* @access public
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*/
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var $other = false;
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/**
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* what we are currently parsing: props or filters
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*
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* @var array
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* @access private
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*/
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var $use = 'props';
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/**
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* Root tag, usually 'propfind' for PROPFIND, but can be eg. 'calendar-query' or 'calendar-multiget' for CalDAV REPORT
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*
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* @var array with keys 'name' and 'ns'
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*/
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var $root;
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/**
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* internal tag nesting depth counter
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*
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* @var int
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* @access private
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*/
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var $depth = 0;
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/**
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* On return whole request, if $store_request == true was specified in constructor
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*
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* @var string
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*/
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var $request;
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/**
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* constructor
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*
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* @access public
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* @param string $path
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* @param boolean $store_request=false if true whole request data will be made available in $this->request
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*/
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function _parse_propfind($path, $store_request=false)
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{
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// success state flag
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$this->success = true;
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// property storage array
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$this->props = array();
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// internal tag depth counter
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$this->depth = 0;
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// remember if any input was parsed
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$had_input = false;
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// open input stream
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$f_in = fopen($path, "r");
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if (!$f_in) {
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$this->success = false;
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return;
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}
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// create XML parser
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$xml_parser = xml_parser_create_ns("UTF-8", " ");
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// set tag and data handlers
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xml_set_element_handler($xml_parser,
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array(&$this, "_startElement"),
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array(&$this, "_endElement"));
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xml_set_character_data_handler($xml_parser,
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array(&$this,'_charData')
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);
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// we want a case sensitive parser
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xml_parser_set_option($xml_parser,
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XML_OPTION_CASE_FOLDING, false);
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// parse input
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while ($this->success && !feof($f_in)) {
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$line = fgets($f_in);
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if ($store_request) $this->request .= $line;
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if (is_string($line)) {
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$had_input = true;
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$this->success &= xml_parse($xml_parser, $line, false);
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}
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}
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// finish parsing
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if ($had_input) {
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$this->success &= xml_parse($xml_parser, "", true);
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}
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// free parser
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xml_parser_free($xml_parser);
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// close input stream
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fclose($f_in);
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// if no input was parsed it was a request
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if(!count($this->props)) $this->props = "all"; // default
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}
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/**
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* start tag handler
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*
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* @access private
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* @param resource parser
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* @param string tag name
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* @param array tag attributes
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*/
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function _startElement($parser, $name, $attrs)
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{
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// name space handling
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if (strstr($name, " ")) {
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list($ns, $tag) = explode(" ", $name);
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if ($ns == "")
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$this->success = false;
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} else {
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$ns = "";
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$tag = $name;
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}
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// record root tag
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if ($this->depth == 0) {
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$this->root = array('name' => $tag, 'xmlns' => $ns, 'attrs' => $attrs);
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}
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// special tags at level 1: <allprop> and <propname>
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if ($this->depth == 1) {
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$this->use = 'props';
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switch ($tag)
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{
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case "allprop":
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$this->props = "all";
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break;
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case "propname":
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$this->props = "names";
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break;
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case 'prop':
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break;
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case 'filter':
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$this->use = 'filters';
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$this->filters['attrs'] = $attrs; // need attrs eg. <filters test="(anyof|alloff)">
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break;
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default:
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$this->use = 'other';
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break;
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}
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}
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//echo "$this->depth: use=$this->use $ns:$tag attrs=".array2string($attrs)."\n";
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// requested properties are found at level 2
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// CalDAV filters can be at deeper levels too and we need the attrs, same for other tags (eg. multiget href's)
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if ($this->depth == 2 || $this->use == 'filters' && $this->depth >= 2 || $this->use == 'other' ||
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$this->use == 'props' && $this->depth >= 2) {
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$prop = array("name" => $tag);
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if ($ns)
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$prop["xmlns"] = $ns;
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if ($this->use != 'props' || $this->depth > 2) {
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$prop['attrs'] = $attrs;
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$prop['depth'] = $this->depth;
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}
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// collect sub-elements of props in the original props children attribute
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// eg. required for CalDAV <calendar-data><expand start="..." end="..."/></calendar-data>
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if ($this->use == 'props' && $this->depth > 2)
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{
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$this->last_prop['children'][$tag] = $prop;
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}
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else
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{
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// this can happen if we have allprop and prop in one propfind:
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// <allprop /><prop><blah /></prop>, eg. blah is not automatic returned by allprop
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if (!is_array($this->{$this->use}) && $this->{$this->use}) $this->{$this->use} = array($this->{$this->use});
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$this->{$this->use}[] =& $prop;
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$this->last_prop =& $prop;
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unset($prop);
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}
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}
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// increment depth count
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$this->depth++;
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}
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/**
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* end tag handler
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*
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* @access private
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* @param resource parser
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* @param string tag name
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*/
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function _endElement($parser, $name)
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{
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// here we only need to decrement the depth count
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$this->depth--;
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}
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/**
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* char data handler for non prop tags, eg. href's in CalDAV multiget, or filter contents
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*
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* @access private
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* @param resource parser
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* @param string character data
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*/
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function _charData($parser, $data)
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{
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if ($this->use != 'props' && ($n = count($this->{$this->use})) && ($data = trim($data))) {
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$this->{$this->use}[$n-1]['data'] = $data;
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}
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}
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}
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