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egroupware/phpgwapi/inc/class.http_dav_client.inc.php
Ralf Becker ff3eae22d3 sim's patch #1217: webdav client cache fix
2003-03-04 18:10:15 +00:00

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<?php
/**************************************************************************\
* phpGroupWare API - WebDAV *
* This file written by Jonathon Sim (for Zeald Ltd) <jsim@free.net.nz> *
* Provides methods for manipulating an RFC 2518 DAV repository *
* Copyright (C) 2002 Zeald Ltd *
* -------------------------------------------------------------------------*
* This library is part of the phpGroupWare API *
* http://www.phpgroupware.org/api *
* ------------------------------------------------------------------------ *
* This library is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 2.1 of the License, *
* or any later version. *
* This library is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
* See the GNU Lesser General Public License for more details. *
* You should have received a copy of the GNU Lesser General Public License *
* along with this library; if not, write to the Free Software Foundation, *
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
\**************************************************************************/
/* $Id$ */
/*At the moment much of this is simply a wrapper around the NET_HTTP_Client class,
with some other methods for parsing the returned XML etc
Ideally this will eventually use groupware's inbuilt HTTP class
*/
define ('DEBUG_DAV_CLIENT', 0);
define ('DEBUG_DAV_XML', 0);
define ('DEBUG_CACHE', 0);
##############################################################
# 'Private' classes - these are only used internally and should
# not be used by external code
##############################################################
/*
PHP STILL doesnt have any sort of stable DOM parser. So lets make our
own XML parser, that parses XML into a tree of arrays (I know, it could do
something resembling DOM, but it doesnt!)
*/
class xml_tree_parser
{
var $namespaces;
var $current_element;
var $num = 1;
var $tree = NULL;
/*
This is the only end-user function in the class. Call parse with an XML string, and
you will get back the tree of 'element' arrays
*/
function parse($xml_string)
{
$this->xml_parser = xml_parser_create();
xml_set_element_handler($this->xml_parser,array(&$this,"start_element"),array(&$this,"end_element"));
xml_set_character_data_handler($this->xml_parser,array(&$this,"parse_data"));
$this->parser_result=array();
$this->xml = $xml_string;
xml_parse($this->xml_parser,$xml_string);
xml_parser_free($this->xml_parser);
if (DEBUG_DAV_XML)
{
echo '<pre>'.htmlentities($xml_string).'</pre>';
echo 'parsed to:' ; $this->print_tree();
}
return $this->tree;
}
//a useful function for debug output - will print the tree after parsing
function print_tree($element=NULL, $prefix='|', $processed=array())
{
if ($processed[$element['id']])
{
echo '<b>***RECURSION!!***</b></br>';
die();
}
else
{
$processed[$element['id']] = true;
}
if ($element == NULL)
{
$element = $this->tree;
}
echo $prefix.$element['namespace'].':'.$element['name'].' '.$element['start'].'->'.$element['end'].'<br>';
$prefix .= '-->';
if ($element['data'])
{
echo $prefix.$element['data'].'<br>';
}
foreach ($element['children'] as $id=>$child)
{
$this->print_tree($child, $prefix, &$processed);
}
}
//called by the xml parser at the start of an element, it creates that elements node in the tree
function start_element($parser,$name,$attr)
{
if (preg_match('/(.*):(.*)/', $name, $matches))
{
$ns = $this->namespaces[$matches[1]];
$element = $matches[2];
}
else
{
$element = $name;
}
if ($this->tree == NULL)
{
$this->tree = array(
'namespace'=>$ns,
'name' => $element,
'attributes' => $attr,
'data' => '',
'children' => array(),
'parent' => NULL,
'type' => 'xml_element',
'id' => $this->num
);
$this->current_element = &$this->tree;
}
else
{
$parent = &$this->current_element;
$parent['children'][$this->num]=array(
'namespace'=>$ns,
'name' => $element,
'attributes' => $attr,
'data' => '',
'children' => array(),
'parent' => &$parent,
'type' => 'xml_element',
'id' => $this->num
);
$this->current_element = &$parent['children'][$this->num];
}
$this->num++;
$this->current_element['start'] = xml_get_current_byte_index($parser);
foreach ($attr as $name => $value)
{
if (ereg('^XMLNS:(.*)', $name, $matches) )
{
$this->namespaces[$matches[1]] = $value;
}
}
}
//at the end of an element, stores the start and end positions in the xml stream, and moves up the tree
function end_element($parser,$name)
{
$curr = xml_get_current_byte_index($parser);
$this->current_element['end'] =strpos($this->xml, '>', $curr);
$this->current_element = &$this->current_element['parent'];
}
//if there is a CDATA element, puts it into the parent elements node
function parse_data($parser,$data)
{
$this->current_element['data']=$data;
}
}
/*This class uses a bunch of recursive functions to process the DAV XML tree
digging out the relevent information and putting it into an array
*/
class dav_processor
{
function dav_processor($xml_string)
{
$this->xml = $xml_string;
$this->dav_parser = new xml_tree_parser();
$this->tree = $this->dav_parser->parse($xml_string);
}
function process_tree(&$element, &$result_array)
{
//This lets us mark a node as 'done' and provides protection against infinite loops
if ($this->processed[$element['id']])
{
return $result_array;
}
else
{
$this->processed[$element['id']] = true;
}
if ( $element['namespace'] == 'DAV:')
{
if ($element['name'] == 'RESPONSE')
{
$result = array(
'size' => 0,
'getcontenttype' => 'application/octet-stream',
'is_dir' => 0
);
foreach ($element['children'] as $id=>$child)
{
$this->process_properties($child, $result);
}
$result_array[$result['full_name']] = $result;
}
}
// ->recursion
foreach ($element['children'] as $id=>$child)
{
$this->process_tree($child, $result_array);
}
return $result_array;
}
function process_properties($element, &$result_array)
{
if ($this->processed[$element['id']])
{
return $result_array;
}
else
{
$this->processed[$element['id']] = true;
}
if ( $element['namespace'] == 'DAV:')
{
switch ($element['name'])
{
case 'HREF':
$string = $element['data'];
$idx=strrpos($string,SEP);
if($idx && $idx==strlen($string)-1)
{
$this->current_ref=substr($string,0,$idx);
}
else
{
$this->current_ref=$string;
}
$result_array['name']=basename($string);
$result_array['directory']=dirname($string);
$result_array['full_name'] = $this->current_ref;
break;
case 'SUPPORTEDLOCK':
if (count($element['children'])) //There are active locks
{
$result_array['supported_locks'] = array();
foreach ($element['children'] as $id=>$child)
{
$this->process_properties($child, $result_array['supported_locks']);
}
}
break;
case 'LOCKDISCOVERY':
if (count($element['children'])) //There are active locks
{
$result_array['locks'] = array();
foreach ($element['children'] as $id=>$child)
{
$this->process_properties($child, $result_array['locks']);
}
}
break;
case 'LOCKENTRY':
if (count($element['children']))
{
$result_array[$element['id']] = array();
foreach ($element['children'] as $id=>$child)
{
$this->process_properties($child, $result_array[$element['id']] );
}
}
break;
case 'ACTIVELOCK':
if (count($element['children']))
{
$result_array[$element['id']] = array();
foreach ($element['children'] as $id=>$child)
{
$this->process_properties($child, $result_array[$element['id']] );
}
}
break;
case 'OWNER':
$result_array['owner'] = array();
foreach ($element['children'] as $child)
{
$this->process_verbatim($child, &$result_array['owner'][]);
}
//print_r($element);die();
//die();
$result_array['owner_xml'] = substr($this->xml, $element['start'], $element['end']-$element['start']+1);
return $result_array; //No need to process this branch further
break;
case 'LOCKTOKEN':
if (count($element['children']))
{
foreach ($element['children'] as $id=>$child)
{
$this->process_properties($child, $tmp_result , $processed);
$result_array['lock_tokens'][$tmp_result['full_name']] = $tmp_result;
}
}
break;
case 'LOCKTYPE':
$child = end($element['children']);
if ($child)
{
$this->processed[$child['id']] = true;
$result_array['locktype'] = $child['name'];
}
break;
case 'LOCKSCOPE':
$child = end($element['children']);
if ($child)
{
$this->processed[$child['id']] = true;
$result_array['lockscope'] = $child['name'];
}
break;
default:
if (trim($element['data']))
{
$result_array[strtolower($element['name'])] = $element['data'];
}
}
}
else
{
if (trim($element['data']))
{
$result_array[strtolower($element['name'])] = $element['data'];
}
}
foreach ($element['children'] as $id=>$child)
{
$this->process_properties($child, $result_array);
}
return $result_array;
}
function process_verbatim($element, &$result_array)
{
if ($this->processed[$element['id']])
{
return $result_array;
}
else
{
$this->processed[$element['id']] = true;
}
foreach ( $element as $key => $value)
{
//The parent link is death to naive programmers (eg me) :)
if (!( $key == 'children' || $key == 'parent') )
{
$result_array[$key] = $value;
}
}
$result_array['children'] = array();
foreach ($element['children'] as $id=>$child)
{
echo 'processing child:';
$this->process_verbatim($child, $result_array['children']);
}
return $result_array;
}
}
#####################################################
#This is the actual public interface of this class
#####################################################
class http_dav_client
{
var $attributes=array();
var $vfs_property_map = array();
var $cached_props = array();
function http_dav_client()
{
$this->http_client = CreateObject('phpgwapi.net_http_client');
$this->set_debug(0);
}
//TODO: Get rid of this
//A quick, temporary debug output function
function debug($info) {
if (DEBUG_DAV_CLIENT)
{
echo '<b> http_dav_client debug:<em> ';
if (is_array($info))
{
print_r($info);
}
else
{
echo $info;
}
echo '</em></b><br>';
}
}
/*!
@function glue_url
@abstract glues a parsed url (ie parsed using PHP's parse_url) back
together
@param $url The parsed url (its an array)
*/
function glue_url ($url){
if (!is_array($url))
{
return false;
}
// scheme
$uri = (!empty($url['scheme'])) ? $url['scheme'].'://' : '';
// user & pass
if (!empty($url['user']))
{
$uri .= $url['user'];
if (!empty($url['pass']))
{
$uri .=':'.$url['pass'];
}
$uri .='@';
}
// host
$uri .= $url['host'];
// port
$port = (!empty($url['port'])) ? ':'.$url['port'] : '';
$uri .= $port;
// path
$uri .= $url['path'];
// fragment or query
if (isset($url['fragment']))
{
$uri .= '#'.$url['fragment'];
} elseif (isset($url['query']))
{
$uri .= '?'.$url['query'];
}
return $uri;
}
/*!
@function encodeurl
@abstract encodes a url from its "display name" to something the dav server will accept
@param uri The unencoded uri
@discussion
Deals with "url"s which may contain spaces and other unsavoury characters,
by using appropriate %20s
*/
function encodeurl($uri)
{
$parsed_uri = parse_url($uri);
if (empty($parsed_uri['scheme']))
{
$path = $uri;
}
else
{
$path = $parsed_uri['path'];
}
$fixed_array = array();
foreach (explode('/', $path) as $name)
{
$fixed_array[] = rawurlencode($name);
}
$fixed_path = implode('/', $fixed_array);
if (!empty($parsed_uri['scheme']))
{
$parsed_uri['path'] = $fixed_path;
$newuri = $this->glue_url($parsed_uri);
}
else
{
$newuri = $fixed_path;
}
return $newuri;
}
/*!
@function decodeurl
@abstract decodes a url to its "display name"
@param uri The encoded uri
@discussion
Deals with "url"s which may contain spaces and other unsavoury characters,
by using appropriate %20s
*/
function decodeurl($uri)
{
$parsed_uri = parse_url($uri);
if (empty($parsed_uri['scheme']))
{
$path = $uri;
}
else
{
$path = $parsed_uri['path'];
}
$fixed_array = array();
foreach (explode('/', $path) as $name)
{
$fixed_array[] = rawurldecode($name);
}
$fixed_path = implode('/', $fixed_array);
if (!empty($parsed_uri['scheme']))
{
$parsed_uri['path'] = $fixed_path;
$newuri = $this->glue_url($parsed_uri);
}
else
{
$newuri = $fixed_path;
}
return $newuri;
}
/*!
@function set_attributes
@abstract Sets the "attribute map"
@param attributes Attributes to extract "as-is" from the DAV properties
@param dav_map A mapping of dav_property_name => attribute_name for attributes
with different names in DAV and the desired name space.
@discussion
This is mainly for use by VFS, where the VFS attributes (eg size) differ
from the corresponding DAV ones ("getcontentlength")
*/
function set_attributes($attributes, $dav_map)
{
$this->vfs_property_map = $dav_map;
$this->attributes = $attributes;
}
/*!
@function set_credentials
@abstract Sets authentication credentials for HTTP AUTH
@param username The username to connect with
@param password The password to connect with
@discussion
The only supported authentication type is "basic"
*/
function set_credentials( $username, $password )
{
$this->http_client->setCredentials($username, $password );
}
/*!
@function connect
@abstract connects to the server
@param dav_host The host to connect to
@param dav_port The port to connect to
@discussion
If the server requires authentication you will need to set credentials
with set_credentials first
*/
function connect($dav_host,$dav_port)
{
$this->dav_host = $dav_host;
$this->dav_port = $dav_port;
$this->http_client->addHeader('Host',$this->dav_host);
$this->http_client->addHeader('Connection','close');
//$this->http_client->addHeader('transfer-encoding','identity');
// $this->http_client->addHeader('Connection','keep-alive');
// $this->http_client->addHeader('Keep-Alive','timeout=20, state="Accept,Accept-Language"');
$this->http_client->addHeader('Accept-Encoding','chunked');
$this->http_client->setProtocolVersion( '1.1' );
$this->http_client->addHeader( 'user-agent', 'Mozilla/5.0 (compatible; PHPGroupware dav_client/1; Linux)');
return $this->http_client->Connect($dav_host,$dav_port);
}
function set_debug($debug)
{
$this->http_client->setDebug($debug);
}
/*!
@function disconnect
@abstract disconnect from the server
@discussion
When doing HTTP 1.1 we frequently close/reopen the connection
anyway, so this function needs to be called after any other DAV calls
(since if they find the connection closed, they just reopen it)
*/
function disconnect()
{
$this->http_client->Disconnect();
}
/*!
@function get_properties
@abstract a high-level method of getting DAV properties
@param url The URL to get properties for
@param scope the 'depth' to recuse subdirectories (default 1)
@param sorted whether we should sort the rsulting array (default True)
@result array of file->property arra
@discussion
This function performs all the necessary XML parsing etc to convert DAV properties (ie XML nodes)
into associative arrays of properties - including doing mappings
from DAV property names to any desired property name format (eg the VFS one)
This is controlled by the attribute arrays set in the set_attributes function.
*/
function get_properties($url,$scope=1){
$request_id = $url.'//'.$scope.'//'.$sorted; //A unique id for this request (for caching)
if ($this->cached_props[$request_id])
{
if (DEBUG_CACHE) echo'Cache hit : cache id:'.$request_id;
return $this->cached_props[$request_id];
}
else if (! $sorted && $this->cached_props[$url.'//'.$scope.'//1'])
{
if (DEBUG_CACHE) echo ' Cache hit : cache id: '.$request_id;
return $this->cached_props[$url.'//'.$scope.'//1'];
}
if (DEBUG_CACHE)
{
echo ' <b>Cache miss </b>: cache id: '.$request_id;
/* echo " cache:<pre>";
print_r($this->cached_props);
echo '</pre>';*/
}
if($this->propfind($url,$scope) != 207)
{
if($this->propfind($url.'/',$scope) != 207)
{
return array();
}
}
$xml_result=$this->http_client->getBody();
$result_array = array();
$dav_processor = new dav_processor($xml_result);
$tmp_list = $dav_processor->process_tree($dav_processor->tree, $result_array);
foreach($tmp_list as $name=>$item) {
$fixed_name = $this->decodeurl($name);
$newitem = $item;
$newitem['is_dir']= ($item['getcontenttype'] =='httpd/unix-directory' ? 1 : 0);
$item['directory'] = $this->decodeurl($item['directory']);
//Since above we sawed off the protocol and host portions of the url, lets readd them.
if (strlen($item['directory'])) {
$path = $item['directory'];
$host = $this->dav_host;
$newitem['directory'] = $host.$path;
}
//Get any extra properties that may share the vfs name
foreach ($this->attributes as $num=>$vfs_name)
{
if ($item[$vfs_name])
{
$newitem[$vfs_name] = $item[$vfs_name];
}
}
//Map some DAV properties onto VFS ones.
foreach ($this->vfs_property_map as $dav_name=>$vfs_name)
{
if ($item[$dav_name])
{
$newitem[$vfs_name] = $item[$dav_name];
}
}
if ($newitem['is_dir'] == 1)
{
$newitem['mime_type']='Directory';
}
$this->debug('<br><br>properties:<br>');
$this->debug($newitem);
$newitem['name'] = $this->decodeurl($newitem['name']);
$result[$fixed_name]=$newitem;
if ($newitem['is_dir']==1)
{
$this->cached_props[$name.'//0//1'] = array($fixed_name=>$newitem);
}
else
{
$this->cached_props[$name.'//1//1'] = array($fixed_name=>$newitem);
}
}
if ($sorted)
{
ksort($result);
}
$this->cached_props[$request_id] = $result;
return $result;
}
function get($uri)
{
$uri = $this->encodeurl($uri);
return $this->http_client->Get($uri);
}
/*!
@function get_body
@abstract return the response body
@result string body content
@discussion
invoke it after a Get() call for instance, to retrieve the response
*/
function get_body()
{
return $this->http_client->getBody();
}
/*!
@function get_headers
@abstract return the response headers
@result array headers received from server in the form headername => value
@discussion
to be called after a Get() or Head() call
*/
function get_headers()
{
return $this->http_client->getHeaders();
}
/*!
@function copy
@abstract PUT is the method to sending a file on the server.
@param uri the location of the file on the server. dont forget the heading "/"
@param data the content of the file. binary content accepted
@result string response status code 201 (Created) if ok
*/
function put($uri, $data, $token='')
{
$uri = $this->encodeurl($uri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
if (strlen($token))
{
$this->http_client->addHeader('If', '<'.$uri.'>'.' (<'.$token.'>)');
}
$this->cached_props = array();
$result = $this->http_client->Put($uri, $data);
$this->http_client->removeHeader('If');
return $result;
}
/*!
@function copy
@abstract Copy a file -allready on the server- into a new location
@param srcUri the current file location on the server. dont forget the heading "/"
@param destUri the destination location on the server. this is *not* a full URL
@param overwrite boolean - true to overwrite an existing destination - overwrite by default
@result Returns the HTTP status code
@discussion
returns response status code 204 (Unchanged) if ok
*/
function copy( $srcUri, $destUri, $overwrite=true, $scope=0, $token='')
{
$srcUri = $this->encodeurl($srcUri);
$destUri = $this->encodeurl($destUri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
if (strlen($token))
{
$this->http_client->addHeader('If', '<'.$uri.'>'.' (<'.$token.'>)');
}
$this->cached_props = array();
$result = $this->http_client->Copy( $srcUri, $destUri, $overwrite, $scope);
$this->http_client->removeHeader('If');
return $result;
}
/*!
@function move
@abstract Moves a WEBDAV resource on the server
@param srcUri the current file location on the server. dont forget the heading "/"
@param destUri the destination location on the server. this is *not* a full URL
@param overwrite boolean - true to overwrite an existing destination (default is yes)
@result Returns the HTTP status code
@discussion
returns response status code 204 (Unchanged) if ok
*/
function move( $srcUri, $destUri, $overwrite=true, $scope=0, $token='' )
{
$srcUri = $this->encodeurl($srcUri);
$destUri = $this->encodeurl($destUri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
if (strlen($token))
{
$this->http_client->addHeader('If', '<'.$uri.'>'.' (<'.$token.'>)');
}
$this->cached_props = array();
$result = $this->http_client->Move( $srcUri, $destUri, $overwrite, $scope);
$this->http_client->removeHeader('If');
return $result;
}
/*!
@function delete
@abstract Deletes a WEBDAV resource
@param uri The URI we are deleting
@result Returns the HTTP status code
@discussion
returns response status code 204 (Unchanged) if ok
*/
function delete( $uri, $scope=0, $token='')
{
$uri = $this->encodeurl($uri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
if (strlen($token))
{
$this->http_client->addHeader('If', '<'.$uri.'>'.' (<'.$token.'>)');
}
$this->cached_props = array();
$result = $this->http_client->Delete( $uri, $scope);
$this->http_client->removeHeader('If');
return $result;
}
/*!
@function mkcol
@abstract Creates a WEBDAV collection (AKA a directory)
@param uri The URI to create
@result Returns the HTTP status code
*/
function mkcol( $uri, $token='' )
{
$uri = $this->encodeurl($uri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
if (strlen($token))
{
$this->http_client->addHeader('If', '<'.$uri.'>'.' (<'.$token.'>)');
}
$this->cached_props = array();
return $this->http_client->MkCol( $uri );
$this->http_client->removeHeader('If');
}
/*!
@function propfind
@abstract Queries WEBDAV properties
@param uri uri of resource whose properties we are changing
@param scope Specifies how "deep" to search (0=just this file/dir 1=subfiles/dirs etc)
@result Returns the HTTP status code
@discussion
to get the result XML call get_body()
*/
function propfind( $uri, $scope=0 )
{
$uri = $this->encodeurl($uri);
return $this->http_client->PropFind( $uri, $scope);
}
/*!
@function proppatch
@abstract Sets DAV properties
@param uri uri of resource whose properties we are changing
@param attributes An array of attributes and values.
@param namespaces Extra namespace definitions that apply to the properties
@result Returns the HTTP status code
@discussion
To make DAV properties useful it helps to use a well established XML dialect
such as the "Dublin Core"
*/
function proppatch($uri, $attributes, $namespaces='', $token='')
{
$uri = $this->encodeurl($uri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
if (strlen($token))
{
$this->http_client->addHeader('If', '<'.$uri.'>'.' (<'.$token.'>)');
}
$this->cached_props = array();
//Begin evil nastiness
$davxml = '<?xml version="1.0" encoding="utf-8" ?>
<D:propertyupdate xmlns:D="DAV:"';
if ($namespaces)
{
$davxml .= ' ' . $namespaces;
}
$davxml .= ' >';
foreach ($attributes as $name => $value)
{
$davxml .= '
<D:set>
<D:prop>
<'.$name.'>'.utf8_encode(htmlspecialchars($value)).'</'.$name.'>
</D:prop>
</D:set>
';
}
$davxml .= '
</D:propertyupdate>';
if (DEBUG_DAV_XML) {
echo '<b>send</b><pre>'.htmlentities($davxml).'</pre>';
}
$this->http_client->requestBody = $davxml;
if( $this->http_client->sendCommand( 'PROPPATCH '.$uri.' HTTP/1.1' ) )
{
$this->http_client->processReply();
}
if (DEBUG_DAV_XML) {
echo '<b>Recieve</b><pre>'.htmlentities($this->http_client->getBody()).'</pre>';
}
$this->http_client->removeHeader('If');
return $this->http_client->reply;
}
/*!
@function unlock
@abstract unlocks a locked resource on the DAV server
@param uri uri of the resource we are unlocking
@param a 'token' for the lock (to get the token, do a propfind)
@result true if successfull
@discussion
Not all DAV servers support locking (its in the RFC, but many common
DAV servers only implement "DAV class 1" (no locking)
*/
function unlock($uri, $token)
{
$uri = $this->encodeurl($uri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
$this->cached_props = array();
$this->http_client->addHeader('Lock-Token', '<'.$token.'>');
$this->http_client->sendCommand( 'UNLOCK '.$uri.' HTTP/1.1');
$this->http_client->removeHeader('Lock-Token');
$this->http_client->processReply();
if ( $this->http_client->reply == '204')
{
return true;
}
else
{
$headers = $this->http_client->getHeaders();
echo $this->http_client->getBody();
if ($headers['Content-Type'] == 'text/html')
{
echo $this->http_client->getBody();
die();
}
else
{
return false;
}
}
}
/*!
@function lock
@abstract locks a resource on the DAV server
@param uri uri of the resource we are locking
@param owner the 'owner' information for the lock (purely informative)
@param depth the depth to which we lock collections
@result true if successfull
@discussion
Not all DAV servers support locking (its in the RFC, but many common
DAV servers only implement "DAV class 1" (no locking)
*/
function lock($uri, $owner, $depth=0, $timeout='infinity')
{
$uri = $this->encodeurl($uri);
if (DEBUG_CACHE) echo '<b>cache cleared</b>';
$this->cached_props = array();
$body = "<?xml version=\"1.0\" encoding=\"utf-8\" ?>
<D:lockinfo xmlns:D='DAV:'>
<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>
<D:owner><D:href>$owner</D:href></D:owner>
</D:lockinfo>\n";
$this->http_client->requestBody = utf8_encode( $body );
$this->http_client->addHeader('Depth', $depth);
if (! (strtolower(trim($timeout)) == 'infinite'))
{
$timeout = 'Second-'.$timeout;
}
$this->http_client->addHeader('Timeout', $timeout);
if( $this->http_client->sendCommand( "LOCK $uri HTTP/1.1" ) )
$this->http_client->processReply();
$this->http_client->removeHeader('timeout');
if ( $this->http_client->reply == '200')
{
return true;
}
else
{
$headers = $this->http_client->getHeaders();
echo $this->http_client->getBody();
return false;
}
}
/*!
@function options
@abstract determines the optional HTTP features supported by a server
@param uri uri of the resource we are seeking options for (or * for the whole server)
@result Returns an array of option values
@discussion
Interesting options include "ACCESS" (whether you can read a file) and
DAV (DAV features)
*/
function options($uri)
{
$uri = $this->encodeurl($uri);
if( $this->http_client->sendCommand( 'OPTIONS '.$uri.' HTTP/1.1' ) == '200' )
{
$this->http_client->processReply();
$headers = $this->http_client->getHeaders();
return $headers;
}
else
{
return False;
}
}
/*!
@function dav_features
@abstract determines the features of a DAV server
@param uri uri of resource whose properties we are changing
@result Returns an array of option values
@discussion
Likely return codes include NULL (this isnt a dav server!), 1
(This is a dav server, supporting all standard DAV features except locking)
2, (additionally supports locking (should also return 1)) and
'version-control' (this server supports versioning extensions for this resource)
*/
function dav_features($uri)
{
$uri = $this->encodeurl($uri);
$options = $this->options($uri);
$dav_options = $options['DAV'];
if ($dav_options)
{
$features=explode(',', $dav_options);
}
else
{
$features = NULL;
}
return $features;
}
/**************************************************************
RFC 3253 DeltaV versioning extensions
**************************************************************
These are 100% untested, and almost certainly dont work yet...
eventually they will be made to work with subversion...
*/
/*!
@function report
@abstract Report is a kind of extended PROPFIND - it queries properties accros versions etc
@param uri uri of resource whose properties we are changing
@param report the type of report desired eg DAV:version-tree, DAV:expand-property etc (see http://greenbytes.de/tech/webdav/rfc3253.html#METHOD_REPORT)
@param namespace any extra XML namespaces needed for the specified properties
@result Returns an array of option values
@discussion
From the relevent RFC:
"A REPORT request is an extensible mechanism for obtaining information about
a resource. Unlike a resource property, which has a single value, the value
of a report can depend on additional information specified in the REPORT
request body and in the REPORT request headers."
*/
function report($uri, $report, $properties, $namespaces='')
{
$uri = $this->encodeurl($uri);
$davxml = '<?xml version="1.0" encoding="utf-8" ?>
<D:'.$report . 'xmlns:D="DAV:"';
if ($namespaces)
{
$davxml .= ' ' . $namespaces;
}
$davxml .= ' >
<D:prop>';
foreach($properties as $property)
{
$davxml .= '<'.$property.'/>\n';
}
$davxml .= '\t<D:/prop>\n<D:/'.$report.'>';
if (DEBUG_DAV_XML) {
echo '<b>send</b><pre>'.htmlentities($davxml).'</pre>';
}
$this->http_client->requestBody = $davxml;
if( $this->http_client->sendCommand( 'REPORT '.$uri.' HTTP/1.1' ) )
{
$this->http_client->processReply();
}
if (DEBUG_DAV_XML) {
echo '<b>Recieve</b><pre>'.htmlentities($this->http_client->getBody()).'</pre>';
}
return $this->http_client->reply;
}
}
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