From c7acb7d7fbc51e633e7e8c725c11a712c84a011f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Hans-J=C3=BCrgen=20Tappe?= Date: Sun, 12 Sep 2010 13:37:05 +0000 Subject: [PATCH] Merge rev. 31594 (Tracker #2704) from trunk into 1.8. --- egw-pear/HTTP/WebDAV/Server.php | 2633 +++++++++++++++++++++++++++++++ 1 file changed, 2633 insertions(+) create mode 100644 egw-pear/HTTP/WebDAV/Server.php diff --git a/egw-pear/HTTP/WebDAV/Server.php b/egw-pear/HTTP/WebDAV/Server.php new file mode 100644 index 0000000000..e7c3f6174d --- /dev/null +++ b/egw-pear/HTTP/WebDAV/Server.php @@ -0,0 +1,2633 @@ + | +// | Christian Stocker | +// +----------------------------------------------------------------------+ +// +// $Id: Server.php,v 1.56 2006/10/10 11:53:16 hholzgra Exp $ +// +require_once "HTTP/WebDAV/Tools/_parse_propfind.php"; +require_once "HTTP/WebDAV/Tools/_parse_proppatch.php"; +require_once "HTTP/WebDAV/Tools/_parse_lockinfo.php"; + +/** + * Virtual base class for implementing WebDAV servers + * + * WebDAV server base class, needs to be extended to do useful work + * + * @package HTTP_WebDAV_Server + * @author Hartmut Holzgraefe + * @version @package_version@ + */ +class HTTP_WebDAV_Server +{ + // {{{ Member Variables + + /** + * complete URI for this request + * + * @var string + */ + var $uri; + + /** + * base URI for this request + * + * @var string + */ + var $base_uri; + + /** + * Set if client requires to be a url (true) or a path (false). + * RFC 4918 allows both: http://www.webdav.org/specs/rfc4918.html#ELEMENT_href + * But some clients can NOT deal with one or the other! + * + * @var boolean + */ + var $client_require_href_as_url; + + /** + * Set if client requires does not allow namespace redundacy. + * The XML Namespace specification does allow both + * But some clients can NOT deal with one or the other! + * + * @var boolean (client_refuses_redundand_namespace_declarations) + * @var boolean (client_needs_redundand_namespace_declarations) + */ + var $crrnd = false; + var $cnrnd = false; + + /** + + + /** + * URI path for this request + * + * @var string + */ + var $path; + + /** + * Realm string to be used in authentification popups + * + * @var string + */ + var $http_auth_realm = "PHP WebDAV"; + + /** + * String to be used in "X-Dav-Powered-By" header + * + * @var string + */ + var $dav_powered_by = ""; + + /** + * Remember parsed If: (RFC2518/9.4) header conditions + * + * @var array + */ + var $_if_header_uris = array(); + + /** + * HTTP response status/message + * + * @var string + */ + var $_http_status = "200 OK"; + + /** + * encoding of property values passed in + * + * @var string + */ + var $_prop_encoding = "utf-8"; + + /** + * Copy of $_SERVER superglobal array + * + * Derived classes may extend the constructor to + * modify its contents + * + * @var array + */ + var $_SERVER; + + // }}} + + // {{{ Constructor + + /** + * Constructor + * + * @param void + */ + function HTTP_WebDAV_Server() + { + // PHP messages destroy XML output -> switch them off + ini_set("display_errors", 0); + + // copy $_SERVER variables to local _SERVER array + // so that derived classes can simply modify these + $this->_SERVER = $_SERVER; + } + + // }}} + + // {{{ ServeRequest() + /** + * Serve WebDAV HTTP request + * + * dispatch WebDAV HTTP request to the apropriate method handler + * + * @param void + * @return void + */ + function ServeRequest() + { + // prevent warning in litmus check 'delete_fragment' + if (strstr($this->_SERVER["REQUEST_URI"], '#')) { + $this->http_status("400 Bad Request"); + return; + } + + // default is currently to use just the path, extending class can set $this->client_require_href_as_url depending on user-agent + if ($this->client_require_href_as_url) + { + // default uri is the complete request uri + $uri = (@$this->_SERVER["HTTPS"] === "on" ? "https:" : "http:") . '//'.$this->_SERVER['HTTP_HOST']; + } + // we cant use SCRIPT_NAME, because it fails, if there's any url rewriting + //error_log("pathinfo:\n". $this->_urldecode($this->_SERVER['REQUEST_URI']).":\n".$this->_SERVER['PATH_INFO']); + $uri .= $this->_urldecode($this->_SERVER['REQUEST_URI']); + if (!empty($this->_SERVER["PATH_INFO"])) + { + $uri = substr($uri,0,-strlen($this->_SERVER["PATH_INFO"])); + } + + $path_info = empty($this->_SERVER["PATH_INFO"]) ? "/" : $this->_SERVER["PATH_INFO"]; + + $this->base_uri = $uri; + $this->uri = $uri . $path_info; + // set path + // $_SERVER['PATH_INFO'] is already urldecoded + //$this->path = $this->_urldecode($path_info); + // quote '#' (e.g. OpenOffice uses this for lock-files) + $this->path = strtr($path_info,array( + '%' => '%25', + '#' => '%23', + '?' => '%3F', + )); + if (!strlen($this->path)) { + if ($this->_SERVER["REQUEST_METHOD"] == "GET") { + // redirect clients that try to GET a collection + // WebDAV clients should never try this while + // regular HTTP clients might ... + header("Location: ".$this->base_uri."/"); + return; + } else { + // if a WebDAV client didn't give a path we just assume '/' + $this->path = "/"; + } + } + + if (ini_get("magic_quotes_gpc")) { + $this->path = stripslashes($this->path); + } + + + // identify ourselves + if (empty($this->dav_powered_by)) { + header("X-Dav-Powered-By: PHP class: ".get_class($this)); + } else { + header("X-Dav-Powered-By: ".$this->dav_powered_by); + } + + // check authentication + // for the motivation for not checking OPTIONS requests on / see + // http://pear.php.net/bugs/bug.php?id=5363 + if ( ( !(($this->_SERVER['REQUEST_METHOD'] == 'OPTIONS') && ($this->path == "/"))) + && (!$this->_check_auth())) { + // RFC2518 says we must use Digest instead of Basic + // but Microsoft Clients do not support Digest + // and we don't support NTLM and Kerberos + // so we are stuck with Basic here + header('WWW-Authenticate: Basic realm="'.($this->http_auth_realm).'"'); + + // Windows seems to require this being the last header sent + // (changed according to PECL bug #3138) + $this->http_status('401 Unauthorized'); + + return; + } + + // check + if (! $this->_check_if_header_conditions()) { + return; + } + + // detect requested method names + $method = strtolower($this->_SERVER["REQUEST_METHOD"]); + $wrapper = "http_".$method; + + // activate HEAD emulation by GET if no HEAD method found + if ($method == "head" && !method_exists($this, "head")) { + $method = "get"; + } + + if (method_exists($this, $wrapper) && ($method == "options" || method_exists($this, $method))) { + $this->$wrapper(); // call method by name + } else { // method not found/implemented + if ($this->_SERVER["REQUEST_METHOD"] == "LOCK") { + $error = '412 Precondition failed'; + ; + } else { + $error = '405 Method not allowed'; + header("Allow: ".join(", ", $this->_allow())); // tell client what's allowed + } + $this->http_status($error); + echo "Error $error\n"; + echo "

$error

\n"; + echo "The requested could not by handled by this server.\n"; + echo '(URI ' . $this->_SERVER['REQUEST_URI'] . ")
\n
\n"; + echo "\n"; + } + } + + // }}} + + // {{{ abstract WebDAV methods + + // {{{ GET() + /** + * GET implementation + * + * overload this method to retrieve resources from your server + *
+ * + * + * @abstract + * @param array &$params Array of input and output parameters + *
input
    + *
  • path - + *
+ *
output
    + *
  • size - + *
+ * @returns int HTTP-Statuscode + */ + + /* abstract + function GET(&$params) + { + // dummy entry for PHPDoc + } + */ + + // }}} + + // {{{ PUT() + /** + * PUT implementation + * + * PUT implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function PUT() + { + // dummy entry for PHPDoc + } + */ + + // }}} + + // {{{ COPY() + + /** + * COPY implementation + * + * COPY implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function COPY() + { + // dummy entry for PHPDoc + } + */ + + // }}} + + // {{{ MOVE() + + /** + * MOVE implementation + * + * MOVE implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function MOVE() + { + // dummy entry for PHPDoc + } + */ + + // }}} + + // {{{ DELETE() + + /** + * DELETE implementation + * + * DELETE implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function DELETE() + { + // dummy entry for PHPDoc + } + */ + // }}} + + // {{{ PROPFIND() + + /** + * PROPFIND implementation + * + * PROPFIND implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function PROPFIND() + { + // dummy entry for PHPDoc + } + */ + + // }}} + + // {{{ PROPPATCH() + + /** + * PROPPATCH implementation + * + * PROPPATCH implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function PROPPATCH() + { + // dummy entry for PHPDoc + } + */ + // }}} + + // {{{ LOCK() + + /** + * LOCK implementation + * + * LOCK implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function LOCK() + { + // dummy entry for PHPDoc + } + */ + // }}} + + // {{{ UNLOCK() + + /** + * UNLOCK implementation + * + * UNLOCK implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function UNLOCK() + { + // dummy entry for PHPDoc + } + */ + // }}} + + // {{{ ACL() + + /** + * ACL implementation + * + * ACL implementation + * + * @abstract + * @param array &$params + * @returns int HTTP-Statuscode + */ + + /* abstract + function ACL() + { + // dummy entry for PHPDoc + } + */ + // }}} + + // }}} + + // {{{ other abstract methods + + // {{{ check_auth() + + /** + * check authentication + * + * overload this method to retrieve and confirm authentication information + * + * @abstract + * @param string type Authentication type, e.g. "basic" or "digest" + * @param string username Transmitted username + * @param string passwort Transmitted password + * @returns bool Authentication status + */ + + /* abstract + function checkAuth($type, $username, $password) + { + // dummy entry for PHPDoc + } + */ + + // }}} + + // {{{ checklock() + + /** + * check lock status for a resource + * + * overload this method to return shared and exclusive locks + * active for this resource + * + * @abstract + * @param string resource Resource path to check + * @returns array An array of lock entries each consisting + * of 'type' ('shared'/'exclusive'), 'token' and 'timeout' + */ + + /* abstract + function checklock($resource) + { + // dummy entry for PHPDoc + } + */ + + // }}} + + // }}} + + // {{{ WebDAV HTTP method wrappers + + // {{{ http_OPTIONS() + + /** + * OPTIONS method handler + * + * The OPTIONS method handler creates a valid OPTIONS reply + * including Dav: and Allowed: heaers + * based on the implemented methods found in the actual instance + * + * @param void + * @return void + */ + function http_OPTIONS() + { + // Microsoft clients default to the Frontpage protocol + // unless we tell them to use WebDAV + header("MS-Author-Via: DAV"); + + // get allowed methods + $allow = $this->_allow(); + + // dav header + $dav = array(1); // assume we are always dav class 1 compliant + if (isset($allow['LOCK'])) { + $dav[] = 2; // dav class 2 requires that locking is supported + } + + // allow extending class to modify DAV and Allow headers + if (method_exists($this,'OPTIONS')) { + $this->OPTIONS($this->path,$dav,$allow); + } + + // tell clients what we found + $this->http_status("200 OK"); + header("DAV: " .join(", ", $dav)); + header("Allow: ".join(", ", $allow)); + + header("Content-length: 0"); + } + + // }}} + + + // {{{ http_PROPFIND() + + /** + * PROPFIND method handler + * + * @param string $handler='PROPFIND' allows to use method eg. for CalDAV REPORT + * @return void + */ + function http_PROPFIND($handler='PROPFIND') + { + $options = Array(); + $files = Array(); + + $options["path"] = $this->path; + + // search depth from header (default is "infinity) + if (isset($this->_SERVER['HTTP_DEPTH'])) { + $options["depth"] = $this->_SERVER["HTTP_DEPTH"]; + } else { + $options["depth"] = "infinity"; + } + + // analyze request payload + $propinfo = new _parse_propfind("php://input"); + if (!$propinfo->success) { + $this->http_status("400 Error"); + return; + } + $options['root'] = $propinfo->root; + $options['props'] = $propinfo->props; + if ($propinfo->filters) + $options['filters'] = $propinfo->filters; + if ($propinfo->other) + $options['other'] = $propinfo->other; + + // call user handler + if (!($retval =$this->$handler($options, $files))) { + $files = array("files" => array()); + if (method_exists($this, "checkLock")) { + // is locked? + $lock = $this->checkLock($this->path); + + if (is_array($lock) && count($lock)) { + $created = isset($lock['created']) ? $lock['created'] : time(); + $modified = isset($lock['modified']) ? $lock['modified'] : time(); + $files['files'][] = array("path" => $this->_slashify($this->path), + "props" => array($this->mkprop("displayname", $this->path), + $this->mkprop("creationdate", $created), + $this->mkprop("getlastmodified", $modified), + $this->mkprop("resourcetype", ""), + $this->mkprop("getcontenttype", ""), + $this->mkprop("getcontentlength", 0)) + ); + } + } + + if (empty($files['files'])) { + $this->http_status("404 Not Found"); + return; + } + } + + // now we generate the reply header ... + if ($retval === true) + { + $this->http_status('207 Multi-Status'); + } + elseif (is_string($retval)) + { + $this->http_status($retval); + header('Content-Type: text/html'); + echo "Error $retval\n"; + echo "

$retval

\n"; + switch (substr($retval, 0 ,3)) + { + case '501': // Not Implemented + echo "The requested feature is not (yet) supported by this server.\n"; + break; + default: + echo "The request could not be handled by this server.\n"; + } + echo '(URI ' . $this->_SERVER['REQUEST_URI'] . ")
\n
\n"; + echo "\n"; + return; + } + // dav header + $dav = array(1); // assume we are always dav class 1 compliant + $allow = false; + + // allow extending class to modify DAV + if (method_exists($this,'OPTIONS')) { + $this->OPTIONS($this->path,$dav,$allow); + } + header("DAV: " .join(", ", $dav)); + header('Content-Type: text/xml; charset="utf-8"'); + + // ... and payload + echo "\n"; + echo ($this->crrnd?'<':'\n"; + + // using an ArrayIterator to prevent foreach from copying the array, + // as we cant loop by reference, when an iterator is given in $files['files'] + if (is_array($files['files'])) + { + $files['files'] = new ArrayIterator($files['files']); + } + // now we loop over all returned file entries + foreach ($files['files'] as $file) { + + // collect namespaces here + $ns_hash = array('DAV:' => 'D'); + + // Microsoft Clients need this special namespace for date and time values + $ns_defs = 'xmlns:ns0="urn:uuid:c2f41010-65b3-11d1-a29f-00aa00c14882/"'; + + // nothing to do if no properties were returend for a file + if (isset($file["props"]) && is_array($file["props"])) { + + // now loop over all returned properties + foreach ($file["props"] as &$prop) { + // as a convenience feature we do not require that user handlers + // restrict returned properties to the requested ones + // here we strip all unrequested entries out of the response + + // this can happen if we have allprop and prop in one propfind: + // , eg. blah is not automatic returned by allprop + switch(is_array($options['props']) ? $options['props'][0] : $options['props']) { + case "all": + // nothing to remove + break; + + case "names": + // only the names of all existing properties were requested + // so we remove all values + unset($prop["val"]); + break; + + default: + $found = false; + + // search property name in requested properties + foreach ((array)$options["props"] as $reqprop) { + if ( $reqprop["name"] == $prop["name"] + && @$reqprop["xmlns"] == $prop["ns"]) { + $found = true; + break; + } + } + + // unset property and continue with next one if not found/requested + if (!$found) { + $prop=""; + continue(2); + } + break; + } + + // namespace handling + if (empty($prop["ns"])) continue; // no namespace + $ns = $prop["ns"]; + //if ($ns == "DAV:") continue; // default namespace + if (isset($ns_hash[$ns])) continue; // already known + + // register namespace + $ns_name = "ns".(count($ns_hash) + 1); + $ns_hash[$ns] = $ns_name; + $ns_defs .= " xmlns:$ns_name=\"$ns\""; + } + + // we also need to add empty entries for properties that were requested + // but for which no values where returned by the user handler + if (is_array($options['props'])) { + foreach ($options["props"] as $reqprop) { + if (!is_array($reqprop) || $reqprop['name']=="") continue; // skip empty entries, or 'all' if used together with + + $found = false; + + // check if property exists in result + foreach ($file["props"] as &$prop) { + if ( $reqprop["name"] == $prop["name"] + && @$reqprop["xmlns"] == $prop["ns"]) { + $found = true; + break; + } + } + + if (!$found) { + if ($reqprop["xmlns"]==="DAV:" && $reqprop["name"]==="lockdiscovery") { + // lockdiscovery is handled by the base class + $file["props"][] + = $this->mkprop("DAV:", + "lockdiscovery", + $this->lockdiscovery($file['path'])); + // only collect $file['noprops'] if we have NO Brief: t HTTP Header + } elseif (!isset($this->_SERVER['HTTP_BRIEF']) || $this->_SERVER['HTTP_BRIEF'] != 't') { + // add empty value for this property + $file["noprops"][] = + $this->mkprop($reqprop["xmlns"], $reqprop["name"], ""); + + // register property namespace if not known yet + if ($reqprop["xmlns"] != "DAV:" && !isset($ns_hash[$reqprop["xmlns"]])) { + $ns_name = "ns".(count($ns_hash) + 1); + $ns_hash[$reqprop["xmlns"]] = $ns_name; + $ns_defs .= " xmlns:$ns_name=\"$reqprop[xmlns]\""; + } + } + } + } + } + } + // ignore empty or incomplete entries + if (!is_array($file) || empty($file) || !isset($file["path"])) continue; + $path = $file['path']; + if (!is_string($path) || $path==="") continue; + + if ($this->crrnd) + { + echo " \n"; + } + else + { + echo " \n"; + } + + /* TODO right now the user implementation has to make sure + collections end in a slash, this should be done in here + by checking the resource attribute */ + // path needs to be urlencoded (only basic version of this class!) + $href = $this->_urlencode($this->_mergePathes($this->base_uri, $path)); + + if ($this->crrnd) + { + echo " $href\n"; + } + else + { + echo " $href\n"; + } + + // report all found properties and their values (if any) + if (isset($file["props"]) && is_array($file["props"])) { + echo ' <'.($this->crrnd?'':'D:')."propstat>\n"; + echo ' <'.($this->crrnd?'':'D:')."prop>\n"; + + foreach ($file["props"] as &$prop) { + + if (!is_array($prop)) continue; + if (!isset($prop["name"])) continue; + + if (!isset($prop["val"]) || $prop["val"] === "" || $prop["val"] === false) { + // empty properties (cannot use empty() for check as "0" is a legal value here) + if ($prop["ns"]=="DAV:") { + echo ' <'.($this->crrnd?'':'D:')."$prop[name]/>\n"; + } else if (!empty($prop["ns"])) { + echo " <".$ns_hash[$prop["ns"]].":$prop[name]/>\n"; + } else { + echo " <$prop[name] xmlns=\"\"/>"; + } + } else if ($prop["ns"] == "DAV:") { + // some WebDAV properties need special treatment + switch ($prop["name"]) { + case "creationdate": + echo ' <'.($this->crrnd?'':'D:')."creationdate ns0:dt=\"dateTime.tz\">" + . gmdate("Y-m-d\\TH:i:s\\Z", $prop['val']) + . 'crrnd?'':'D:')."creationdate>\n"; + break; + case "getlastmodified": + echo ' <'.($this->crrnd?'':'D:')."getlastmodified ns0:dt=\"dateTime.rfc1123\">" + . gmdate("D, d M Y H:i:s ", $prop['val']) + . "GMTcrrnd?'':'D:')."getlastmodified>\n"; + break; + case "supportedlock": + echo ' <'.($this->crrnd?'':'D:')."supportedlock>$prop[val]crrnd?'':'D:')."supportedlock>\n"; + break; + case "lockdiscovery": + echo ' <'.($this->crrnd?'':'D:')."lockdiscovery>\n"; + echo $prop["val"]; + echo ' crrnd?'':'D:')."lockdiscovery>\n"; + break; + default: + $ns_defs = ''; + if (is_array($prop['val'])) + { + $hns_hash = $ns_hash; + $val = $this->_hierarchical_prop_encode($prop['val'], 'DAV:', $ns_defs, $hns_hash); + } elseif (isset($prop['raw'])) { + $val = $this->_prop_encode(''); + } else { + $val = $this->_prop_encode(htmlspecialchars($prop['val'])); + } + echo ' <'.($this->crrnd?'':'D:')."$prop[name]$ns_defs>$val". + 'crrnd?'':'D:')."$prop[name]>\n"; + break; + } + } else { + // allow multiple values and attributes, required eg. for caldav:supported-calendar-component-set + if ($prop['ns'] && is_array($prop['val'])) { + if (!isset($ns_hash[$prop['ns']])) { + $ns_name = "ns".(count($ns_hash) + 1); + $ns_hash[$prop['ns']] = $ns_name; + } + $vals = $extra_ns = ''; + foreach($prop['val'] as $subprop) + { + if ($subprop['ns'] && $subprop['ns'] != 'DAV:') { + // register property namespace if not known yet + if (!isset($ns_hash[$subprop['ns']])) { + $ns_name = "ns".(count($ns_hash) + 1); + $ns_hash[$subprop['ns']] = $ns_name; + } else { + $ns_name = $ns_hash[$subprop['ns']]; + } + if (strchr($extra_ns,$extra=' xmlns:'.$ns_name.'="'.$subprop['ns'].'"') === false) { + $extra_ns .= $extra; + } + $ns_name .= ':'; + } elseif ($subprop['ns'] == 'DAV:') { + $ns_name = 'D:'; + } else { + $ns_name = ''; + } + $vals .= "<$ns_name$subprop[name]"; + if (is_array($subprop['val'])) // val contains only attributes, no value + { + foreach($subprop['val'] as $attr => $val) + { + $vals .= ' '.$attr.'="'.htmlspecialchars($val).'"'; + } + $vals .= '/>'; + } + else + { + $vals .= '>'; + if (isset($subprop['raw'])) { + $vals .= ''; + } else { + $vals .= htmlspecialchars($subprop['val']); + } + $vals .= ""; + } + } + echo ' <'.$ns_hash[$prop['ns']].":$prop[name]$extra_ns>$vals\n"; + } else { + if ($prop['raw']) + { + $val = ''; + } else { + $val = htmlspecialchars($prop['val']); + } + $val = $this->_prop_encode($val); + // properties from namespaces != "DAV:" or without any namespace + if ($prop['ns']) { + if ($this->crrnd) { + echo " <$prop[name] xmlns=".'"'.$prop["ns"].'">' + . $val . "\n"; + } else { + echo " <" . $ns_hash[$prop["ns"]] . ":$prop[name]>" + . $val . '\n"; + } + } else { + echo " <$prop[name] xmlns=\"\">$val\n"; + } + } + } + } + + if ($this->crrnd) + { + echo " \n"; + echo " HTTP/1.1 200 OK\n"; + echo " \n"; + } + else + { + echo " \n"; + echo " HTTP/1.1 200 OK\n"; + echo " \n"; + } + } + + // now report all properties requested but not found + if (isset($file["noprops"])) { + echo ' <'.($this->crrnd?'':'D:')."propstat>\n"; + echo ' <'.($this->crrnd?'':'D:')."prop>\n"; + + foreach ($file["noprops"] as &$prop) { + if ($prop["ns"] == "DAV:") { + echo ' <'.($this->crrnd?'':'D:')."$prop[name]/>\n"; + } else if ($prop["ns"] == "") { + echo " <$prop[name] xmlns=\"\"/>\n"; + } else { + echo " <" . $ns_hash[$prop["ns"]] . ":$prop[name]/>\n"; + } + } + + if ($this->crrnd) + { + echo " \n"; + echo " HTTP/1.1 404 Not Found\n"; + echo " \n"; + } + else + { + echo " \n"; + echo " HTTP/1.1 404 Not Found\n"; + echo " \n"; + } + } + + echo ' crrnd?'':'D:')."response>\n"; + } + + echo 'crrnd?'':'D:')."multistatus>\n"; + } + + + // }}} + + // {{{ http_PROPPATCH() + + /** + * PROPPATCH method handler + * + * @param void + * @return void + */ + function http_PROPPATCH() + { + if ($this->_check_lock_status($this->path)) { + $options = Array(); + + $options["path"] = $this->path; + + $propinfo = new _parse_proppatch("php://input"); + + if (!$propinfo->success) { + $this->http_status("400 Error"); + return; + } + + $options['props'] = $propinfo->props; + + $responsedescr = $this->PROPPATCH($options); + + $this->http_status("207 Multi-Status"); + header('Content-Type: text/xml; charset="utf-8"'); + + echo "\n"; + + echo "\n"; + echo ' <'.($this->crrnd?'':'D:')."response>\n"; + echo ' <'.($this->crrnd?'':'D:')."href>".$this->_urlencode($this->_mergePathes($this->_SERVER["SCRIPT_NAME"], $this->path)).'crrnd?'':'D:')."href>\n"; + + foreach ($options["props"] as $prop) { + echo ' <'.($this->crrnd?'':'D:')."propstat>\n"; + echo ' <'.($this->crrnd?'':'D:')."prop><$prop[name] xmlns=\"$prop[ns]\"/>crrnd?'':'D:')."prop>\n"; + echo ' <'.($this->crrnd?'':'D:')."status>HTTP/1.1 $prop[status]crrnd?'':'D:')."status>\n"; + echo ' crrnd?'':'D:')."propstat>\n"; + } + + if ($responsedescr) { + echo ' <'.($this->crrnd?'':'D:')."responsedescription>". + $this->_prop_encode(htmlspecialchars($responsedescr)). + 'crrnd?'':'D:')."responsedescription>\n"; + } + + echo ' crrnd?'':'D:')."response>\n"; + echo 'crrnd?'':'D:')."multistatus>\n"; + } else { + $this->http_status("423 Locked"); + } + } + + // }}} + + + // {{{ http_MKCOL() + + /** + * MKCOL method handler + * + * @param void + * @return void + */ + function http_MKCOL() + { + $options = Array(); + + $options["path"] = $this->path; + + $stat = $this->MKCOL($options); + + $this->http_status($stat); + } + + // }}} + + + // {{{ http_GET() + + /** + * GET method handler + * + * @param void + * @return void + */ + function http_GET() + { + // TODO check for invalid stream + $options = Array(); + $options["path"] = $this->path; + + $this->_get_ranges($options); + + if (true === ($status = $this->GET($options))) { + if (!headers_sent()) { + $status = "200 OK"; + + if (!isset($options['mimetype'])) { + $options['mimetype'] = "application/octet-stream"; + } + // switching off zlib.output_compression for zip archives, as the double compression makes problems eg. with lighttpd + if ($options['mimetype'] == 'application/zip') + { + ini_set('zlib.output_compression',0); + } + header("Content-type: $options[mimetype]"); + + if (isset($options['mtime'])) { + header("Last-modified:".gmdate("D, d M Y H:i:s ", $options['mtime'])."GMT"); + } + // fix for IE and https, thanks to rob_burcham@yahoo.com + // see http://us3.php.net/manual/en/function.header.php#83219 + // and http://support.microsoft.com/kb/812935 + header("Cache-Control: maxage=1"); //In seconds + header("Pragma: public"); + + if (isset($options['stream'])) { + // GET handler returned a stream + if (!empty($options['ranges']) && (0===fseek($options['stream'], 0, SEEK_SET))) { + // partial request and stream is seekable + + if (count($options['ranges']) === 1) { + $range = $options['ranges'][0]; + + if (isset($range['start'])) { + fseek($options['stream'], $range['start'], SEEK_SET); + if (feof($options['stream'])) { + $this->http_status("416 Requested range not satisfiable"); + return; + } + + if (isset($range['end'])) { + $size = $range['end']-$range['start']+1; + $this->http_status("206 partial"); + header("Content-length: $size"); + header("Content-range: $range[start]-$range[end]/" + . (isset($options['size']) ? $options['size'] : "*")); + while ($size && !feof($options['stream'])) { + $buffer = fread($options['stream'], 4096); + $size -= $this->bytes($buffer); + echo $buffer; + } + } else { + $this->http_status("206 partial"); + if (isset($options['size'])) { + header("Content-length: ".($options['size'] - $range['start'])); + header("Content-range: ".$range['start']."-".$range['end']."/" + . (isset($options['size']) ? $options['size'] : "*")); + } + fpassthru($options['stream']); + } + } else { + header("Content-length: ".$range['last']); + fseek($options['stream'], -$range['last'], SEEK_END); + fpassthru($options['stream']); + } + } else { + $this->_multipart_byterange_header(); // init multipart + foreach ($options['ranges'] as $range) { + // TODO what if size unknown? 500? + if (isset($range['start'])) { + $from = $range['start']; + $to = !empty($range['end']) ? $range['end'] : $options['size']-1; + } else { + $from = $options['size'] - $range['last']-1; + $to = $options['size'] -1; + } + $total = isset($options['size']) ? $options['size'] : "*"; + $size = $to - $from + 1; + $this->_multipart_byterange_header($options['mimetype'], $from, $to, $total); + + + fseek($options['stream'], $from, SEEK_SET); + while ($size && !feof($options['stream'])) { + $buffer = fread($options['stream'], 4096); + $size -= $this->bytes($buffer); + echo $buffer; + } + } + $this->_multipart_byterange_header(); // end multipart + } + } else { + // normal request or stream isn't seekable, return full content + if (isset($options['size'])) { + header("Content-length: ".$options['size']); + } + fpassthru($options['stream']); + return; // no more headers + } + } elseif (isset($options['data'])) { + if (is_array($options['data'])) { + // reply to partial request + } else { + header("Content-length: ".$this->bytes($options['data'])); + echo $options['data']; + } + } + } + } + + if (!headers_sent()) { + if (false === $status) { + $this->http_status("404 not found"); + } else { + // TODO: check setting of headers in various code pathes above + $this->http_status("$status"); + } + } + } + + + /** + * parse HTTP Range: header + * + * @param array options array to store result in + * @return void + */ + function _get_ranges(&$options) + { + // process Range: header if present + if (isset($this->_SERVER['HTTP_RANGE'])) { + + // we only support standard "bytes" range specifications for now + if (preg_match('/bytes\s*=\s*(.+)/', $this->_SERVER['HTTP_RANGE'], $matches)) { + $options["ranges"] = array(); + + // ranges are comma separated + foreach (explode(",", $matches[1]) as $range) { + // ranges are either from-to pairs or just end positions + list($start, $end) = explode("-", $range); + $options["ranges"][] = ($start==="") + ? array("last"=>$end) + : array("start"=>$start, "end"=>$end); + } + } + } + } + + /** + * generate separator headers for multipart response + * + * first and last call happen without parameters to generate + * the initial header and closing sequence, all calls inbetween + * require content mimetype, start and end byte position and + * optionaly the total byte length of the requested resource + * + * @param string mimetype + * @param int start byte position + * @param int end byte position + * @param int total resource byte size + */ + function _multipart_byterange_header($mimetype = false, $from = false, $to=false, $total=false) + { + if ($mimetype === false) { + if (!isset($this->multipart_separator)) { + // initial + + // a little naive, this sequence *might* be part of the content + // but it's really not likely and rather expensive to check + $this->multipart_separator = "SEPARATOR_".md5(microtime()); + + // generate HTTP header + header("Content-type: multipart/byteranges; boundary=".$this->multipart_separator); + } else { + // final + + // generate closing multipart sequence + echo "\n--{$this->multipart_separator}--"; + } + } else { + // generate separator and header for next part + echo "\n--{$this->multipart_separator}\n"; + echo "Content-type: $mimetype\n"; + echo "Content-range: $from-$to/". ($total === false ? "*" : $total); + echo "\n\n"; + } + } + + + + // }}} + + // {{{ http_HEAD() + + /** + * HEAD method handler + * + * @param void + * @return void + */ + function http_HEAD() + { + $status = false; + $options = Array(); + $options["path"] = $this->path; + + if (method_exists($this, "HEAD")) { + $status = $this->head($options); + } else if (method_exists($this, "GET")) { + ob_start(); + $status = $this->GET($options); + if (!isset($options['size'])) { + $options['size'] = ob_get_length(); + } + ob_end_clean(); + } + + if (!isset($options['mimetype'])) { + $options['mimetype'] = "application/octet-stream"; + } + header("Content-type: $options[mimetype]"); + + if (isset($options['mtime'])) { + header("Last-modified:".gmdate("D, d M Y H:i:s ", $options['mtime'])."GMT"); + } + + if (isset($options['size'])) { + header("Content-length: ".$options['size']); + } + + if ($status === true) $status = "200 OK"; + if ($status === false) $status = "404 Not found"; + + $this->http_status($status); + } + + // }}} + + // {{{ http_POST() + + /** + * POST method handler + * + * @param void + * @return void + */ + function http_POST() + { + $status = '405 Method not allowed'; + $options = Array(); + $options['path'] = $this->path; + + error_log('WebDAV POST: ' . $this->path); + + if (isset($this->_SERVER['CONTENT_LENGTH'])) + { + $options['content_length'] = $this->_SERVER['CONTENT_LENGTH']; + } + elseif (isset($this->_SERVER['X-Expected-Entity-Length'])) + { + // MacOS gives us that hint + $options['content_length'] = $this->_SERVER['X-Expected-Entity-Length']; + } + + // get the Content-type + if (isset($this->_SERVER["CONTENT_TYPE"])) { + // for now we do not support any sort of multipart requests + if (!strncmp($this->_SERVER["CONTENT_TYPE"], 'multipart/', 10)) { + $this->http_status('501 not implemented'); + echo 'The service does not support mulipart POST requests'; + return; + } + $options['content_type'] = $this->_SERVER['CONTENT_TYPE']; + } else { + // default content type if none given + $options['content_type'] = 'application/octet-stream'; + } + + /* RFC 2616 2.6 says: "The recipient of the entity MUST NOT + ignore any Content-* (e.g. Content-Range) headers that it + does not understand or implement and MUST return a 501 + (Not Implemented) response in such cases." + */ + foreach ($this->_SERVER as $key => $val) { + if (strncmp($key, 'HTTP_CONTENT', 11)) continue; + switch ($key) { + case 'HTTP_CONTENT_ENCODING': // RFC 2616 14.11 + // TODO support this if ext/zlib filters are available + $this->http_status('501 not implemented'); + echo "The service does not support '$val' content encoding"; + return; + + case 'HTTP_CONTENT_LANGUAGE': // RFC 2616 14.12 + // we assume it is not critical if this one is ignored + // in the actual POST implementation ... + $options['content_language'] = $val; + break; + + case 'HTTP_CONTENT_LENGTH': + // defined on IIS and has the same value as CONTENT_LENGTH + break; + + case 'HTTP_CONTENT_LOCATION': // RFC 2616 14.14 + /* The meaning of the Content-Location header in PUT + or POST requests is undefined; servers are free + to ignore it in those cases. */ + break; + + case 'HTTP_CONTENT_RANGE': // RFC 2616 14.16 + // single byte range requests are supported + // the header format is also specified in RFC 2616 14.16 + // TODO we have to ensure that implementations support this or send 501 instead + if (!preg_match('@bytes\s+(\d+)-(\d+)/((\d+)|\*)@', $val, $matches)) { + $this->http_status('400 bad request'); + echo 'The service does only support single byte ranges'; + return; + } + + $range = array('start'=>$matches[1], 'end'=>$matches[2]); + if (is_numeric($matches[3])) { + $range['total_length'] = $matches[3]; + } + $option['ranges'][] = $range; + + // TODO make sure the implementation supports partial POST + // this has to be done in advance to avoid data being overwritten + // on implementations that do not support this ... + break; + + case 'HTTP_CONTENT_TYPE': + // defined on IIS and has the same value as CONTENT_TYPE + break; + + case 'HTTP_CONTENT_MD5': // RFC 2616 14.15 + // TODO: maybe we can just pretend here? + $this->http_status('501 not implemented'); + echo 'The service does not support content MD5 checksum verification'; + return; + + default: + // any other unknown Content-* headers + $this->http_status('501 not implemented'); + echo "The service does not support '$key'"; + return; + } + } + + $options['stream'] = fopen('php://input', 'r'); + + if (method_exists($this, 'POST')) { + $status = $this->POST($options); + + if ($status === false) { + $status = '400 Something went wrong'; + } else if ($status === true) { + $status = '200 OK'; + } else if (is_resource($status) && get_resource_type($status) == 'stream') { + $stream = $status; + + $status = empty($options['new']) ? '200 OK' : '201 Created'; + + if (!empty($options['ranges'])) { + // TODO multipart support is missing (see also above) + if (0 == fseek($stream, $range[0]['start'], SEEK_SET)) { + $length = $range[0]['end']-$range[0]['start']+1; + if (!fwrite($stream, fread($options['stream'], $length))) { + $status = '403 Forbidden'; + } + } else { + $status = '403 Forbidden'; + } + } else { + while (!feof($options['stream'])) { + if (false === fwrite($stream, fread($options['stream'], 4096))) { + $status = '403 Forbidden'; + break; + } + } + } + fclose($stream); + } + } + $this->http_status($status); + } + + // }}} + + // {{{ http_PUT() + + /** + * PUT method handler + * + * @param void + * @return void + */ + function http_PUT() + { + if ($this->_check_lock_status($this->path)) { + $options = Array(); + $options["path"] = $this->path; + + if (isset($this->_SERVER['CONTENT_LENGTH'])) + { + $options['content_length'] = $this->_SERVER['CONTENT_LENGTH']; + } + elseif (isset($this->_SERVER['X-Expected-Entity-Length'])) + { + // MacOS gives us that hint + $options['content_length'] = $this->_SERVER['X-Expected-Entity-Length']; + } + + // get the Content-type + if (isset($this->_SERVER["CONTENT_TYPE"])) { + // for now we do not support any sort of multipart requests + if (!strncmp($this->_SERVER["CONTENT_TYPE"], "multipart/", 10)) { + $this->http_status("501 not implemented"); + echo "The service does not support mulipart PUT requests"; + return; + } + $options["content_type"] = $this->_SERVER["CONTENT_TYPE"]; + } else { + // default content type if none given + $options["content_type"] = "application/octet-stream"; + } + + /* RFC 2616 2.6 says: "The recipient of the entity MUST NOT + ignore any Content-* (e.g. Content-Range) headers that it + does not understand or implement and MUST return a 501 + (Not Implemented) response in such cases." + */ + foreach ($this->_SERVER as $key => $val) { + if (strncmp($key, "HTTP_CONTENT", 11)) continue; + switch ($key) { + case 'HTTP_CONTENT_ENCODING': // RFC 2616 14.11 + // TODO support this if ext/zlib filters are available + $this->http_status("501 not implemented"); + echo "The service does not support '$val' content encoding"; + return; + + case 'HTTP_CONTENT_LANGUAGE': // RFC 2616 14.12 + // we assume it is not critical if this one is ignored + // in the actual PUT implementation ... + $options["content_language"] = $val; + break; + + case 'HTTP_CONTENT_LENGTH': + // defined on IIS and has the same value as CONTENT_LENGTH + break; + + case 'HTTP_CONTENT_LOCATION': // RFC 2616 14.14 + /* The meaning of the Content-Location header in PUT + or POST requests is undefined; servers are free + to ignore it in those cases. */ + break; + + case 'HTTP_CONTENT_RANGE': // RFC 2616 14.16 + // single byte range requests are supported + // the header format is also specified in RFC 2616 14.16 + // TODO we have to ensure that implementations support this or send 501 instead + if (!preg_match('@bytes\s+(\d+)-(\d+)/((\d+)|\*)@', $val, $matches)) { + $this->http_status("400 bad request"); + echo "The service does only support single byte ranges"; + return; + } + + $range = array("start"=>$matches[1], "end"=>$matches[2]); + if (is_numeric($matches[3])) { + $range["total_length"] = $matches[3]; + } + $option["ranges"][] = $range; + + // TODO make sure the implementation supports partial PUT + // this has to be done in advance to avoid data being overwritten + // on implementations that do not support this ... + break; + + case 'HTTP_CONTENT_TYPE': + // defined on IIS and has the same value as CONTENT_TYPE + break; + + case 'HTTP_CONTENT_MD5': // RFC 2616 14.15 + // TODO: maybe we can just pretend here? + $this->http_status("501 not implemented"); + echo "The service does not support content MD5 checksum verification"; + return; + + default: + // any other unknown Content-* headers + $this->http_status("501 not implemented"); + echo "The service does not support '$key'"; + return; + } + } + + $options["stream"] = fopen("php://input", "r"); + + $stat = $this->PUT($options); + + if ($stat === false) { + $stat = "403 Forbidden"; + } else if (is_resource($stat) && get_resource_type($stat) == "stream") { + $stream = $stat; + + $stat = $options["new"] ? "201 Created" : "204 No Content"; + + if (!empty($options["ranges"])) { + // TODO multipart support is missing (see also above) + if (0 == fseek($stream, $range[0]["start"], SEEK_SET)) { + $length = $range[0]["end"]-$range[0]["start"]+1; + if (!fwrite($stream, fread($options["stream"], $length))) { + $stat = "403 Forbidden"; + } + } else { + $stat = "403 Forbidden"; + } + } else { + while (!feof($options["stream"])) { + if (false === fwrite($stream, fread($options["stream"], 4096))) { + $stat = "403 Forbidden"; + break; + } + } + } + + fclose($stream); + } + + $this->http_status($stat); + } else { + $this->http_status("423 Locked"); + } + } + + // }}} + + + // {{{ http_DELETE() + + /** + * DELETE method handler + * + * @param void + * @return void + */ + function http_DELETE() + { + // check RFC 2518 Section 9.2, last paragraph + if (isset($this->_SERVER["HTTP_DEPTH"])) { + if ($this->_SERVER["HTTP_DEPTH"] != "infinity") { + if (stripos($_SERVER['HTTP_USER_AGENT'],'webdrive') !== false) + { + // pretend we didnt see it, as webdrive does not handle the depth parameter correctly while deleting collections + } + else + { + $this->http_status("400 Bad Request"); + return; + } + } + } + + // check lock status + if ($this->_check_lock_status($this->path)) { + // ok, proceed + $options = Array(); + $options["path"] = $this->path; + + $stat = $this->DELETE($options); + + $this->http_status($stat); + } else { + // sorry, its locked + $this->http_status("423 Locked"); + } + } + + // }}} + + // {{{ http_COPY() + + /** + * COPY method handler + * + * @param void + * @return void + */ + function http_COPY() + { + // no need to check source lock status here + // destination lock status is always checked by the helper method + $this->_copymove("copy"); + } + + // }}} + + // {{{ http_MOVE() + + /** + * MOVE method handler + * + * @param void + * @return void + */ + function http_MOVE() + { + if ($this->_check_lock_status($this->path)) { + // destination lock status is always checked by the helper method + $this->_copymove("move"); + } else { + $this->http_status("423 Locked"); + } + } + + // }}} + + + // {{{ http_LOCK() + + /** + * LOCK method handler + * + * @param void + * @return void + */ + function http_LOCK() + { + $options = Array(); + $options["path"] = $this->path; + + if (isset($this->_SERVER['HTTP_DEPTH'])) { + $options["depth"] = $this->_SERVER["HTTP_DEPTH"]; + } else { + $options["depth"] = "infinity"; + } + + if (isset($this->_SERVER["HTTP_TIMEOUT"])) { + $options["timeout"] = explode(",", $this->_SERVER["HTTP_TIMEOUT"]); + } + + if (empty($this->_SERVER['CONTENT_LENGTH']) && !empty($this->_SERVER['HTTP_IF'])) { + // check if locking is possible + if (!$this->_check_lock_status($this->path)) { + $this->http_status("423 Locked"); + return; + } + + // refresh lock + $options["locktoken"] = substr($this->_SERVER['HTTP_IF'], 2, -2); + $options["update"] = $options["locktoken"]; + + // setting defaults for required fields, LOCK() SHOULD overwrite these + $options['owner'] = "unknown"; + $options['scope'] = "exclusive"; + $options['type'] = "write"; + + + $stat = $this->LOCK($options); + } else { + // extract lock request information from request XML payload + $lockinfo = new _parse_lockinfo("php://input"); + if (!$lockinfo->success) { + $this->http_status("400 bad request"); + } + + // check if locking is possible + if (!$this->_check_lock_status($this->path, $lockinfo->lockscope === "shared")) { + $this->http_status("423 Locked"); + return; + } + + // new lock + $options["scope"] = $lockinfo->lockscope; + $options["type"] = $lockinfo->locktype; + // Todo: lockinfo::owner still contains D:href opening and closing tags, maybe they should be removed here with strip_tags + $options["owner"] = $lockinfo->owner; + $options["locktoken"] = $this->_new_locktoken(); + + $stat = $this->LOCK($options); + } + + if (is_bool($stat)) { + $http_stat = $stat ? "200 OK" : "423 Locked"; + } else { + $http_stat = $stat; + } + $this->http_status($http_stat); + + if ($http_stat{0} == 2) { // 2xx states are ok + if ($options["timeout"]) { + if (is_numeric($options["timeout"])) + { + // more than a million is considered an absolute timestamp + // less is more likely a relative value + if ($options["timeout"]>1000000) { + $timeout = "Second-".($options['timeout']-time()); + } else { + $timeout = "Second-$options[timeout]"; + } + } + else + { + $timeout = $options[timeout]; + } + } else { + $timeout = "Infinite"; + } + + header('Content-Type: text/xml; charset="utf-8"'); + header("Lock-Token: <$options[locktoken]>"); + echo "\n"; + echo "\n"; + echo ' <'.($this->crrnd?'':'D:')."lockdiscovery>\n"; + echo ' <'.($this->crrnd?'':'D:')."activelock>\n"; + echo ' <'.($this->crrnd?'':'D:')."lockscope>crrnd?'':'D:')."lockscope>\n"; + echo ' <'.($this->crrnd?'':'D:')."locktype>crrnd?'':'D:')."locktype>\n"; + echo ' <'.($this->crrnd?'':'D:')."depth>$options[depth]crrnd?'':'D:')."depth>\n"; + echo ' <'.($this->crrnd?'':'D:')."owner>$options[owner]crrnd?'':'D:')."owner>\n"; + echo ' <'.($this->crrnd?'':'D:')."timeout>$timeoutcrrnd?'':'D:')."timeout>\n"; + echo ' <'.($this->crrnd?'':'D:')."locktoken>$options[locktoken]crrnd?'':'D:')."locktoken>\n"; + echo ' crrnd?'':'D:')."activelock>\n"; + echo ' crrnd?'':'D:')."lockdiscovery>\n"; + echo 'crrnd?'':'D:')."prop>\n\n"; + } + } + + + // }}} + + // {{{ http_UNLOCK() + + /** + * UNLOCK method handler + * + * @param void + * @return void + */ + function http_UNLOCK() + { + $options = Array(); + $options["path"] = $this->path; + + if (isset($this->_SERVER['HTTP_DEPTH'])) { + $options["depth"] = $this->_SERVER["HTTP_DEPTH"]; + } else { + $options["depth"] = "infinity"; + } + + // strip surrounding <> + $options["token"] = substr(trim($this->_SERVER["HTTP_LOCK_TOKEN"]), 1, -1); + + // call user method + $stat = $this->UNLOCK($options); + + $this->http_status($stat); + } + + // }}} + + // {{{ http_ACL() + + /** + * ACL method handler + * + * @param void + * @return void + */ + function http_ACL() + { + $options = Array(); + $options['path'] = $this->path; + $options['errors'] = array(); + + if (isset($this->_SERVER['HTTP_DEPTH'])) { + $options['depth'] = $this->_SERVER['HTTP_DEPTH']; + } else { + $options['depth'] = 'infinity'; + } + + // call user method + $status = $this->ACL($options); + + // now we generate the reply header ... + $this->http_status($status); + $content = ''; + + if (is_array($options['errors']) && count($options['errors'])) { + header('Content-Type: text/xml; charset="utf-8"'); + // ... and payload + $content .= "\n"; + $content .= " \n"; + foreach ($options['errors'] as $violation) { + $content .= '<'.($this->crrnd?'':'D:')."$violation/>\n"; + } + $content .= 'crrnd?'':'D:')."error>\n"; + } + header("Content-length: ".$this->bytes($content)); + if ($content) echo $options['content']; + } + + // }}} + + // }}} + + // {{{ _copymove() + + function _copymove($what) + { + $options = Array(); + $options["path"] = $this->path; + + if (isset($this->_SERVER["HTTP_DEPTH"])) { + $options["depth"] = $this->_SERVER["HTTP_DEPTH"]; + } else { + $options["depth"] = "infinity"; + } + + extract(parse_url($this->_SERVER["HTTP_DESTINATION"])); + $path = urldecode($path); + $http_host = $host; + if (isset($port) && $port != 80) + $http_host.= ":$port"; + + $http_header_host = preg_replace("/:80$/", "", $this->_SERVER["HTTP_HOST"]); + + if ($http_host == $http_header_host && + !strncmp($this->_SERVER["SCRIPT_NAME"], $path, + strlen($this->_SERVER["SCRIPT_NAME"]))) { + $options["dest"] = substr($path, strlen($this->_SERVER["SCRIPT_NAME"])); + if (!$this->_check_lock_status($options["dest"])) { + $this->http_status("423 Locked"); + return; + } + + } else { + $options["dest_url"] = $this->_SERVER["HTTP_DESTINATION"]; + } + + // see RFC 2518 Sections 9.6, 8.8.4 and 8.9.3 + if (isset($this->_SERVER["HTTP_OVERWRITE"])) { + $options["overwrite"] = $this->_SERVER["HTTP_OVERWRITE"] == "T"; + } else { + $options["overwrite"] = true; + } + + $stat = $this->$what($options); + $this->http_status($stat); + } + + // }}} + + // {{{ _allow() + + /** + * check for implemented HTTP methods + * + * @param void + * @return array something + */ + function _allow() + { + // OPTIONS is always there + $allow = array("OPTIONS" =>"OPTIONS"); + + // all other METHODS need both a http_method() wrapper + // and a method() implementation + // the base class supplies wrappers only + foreach (get_class_methods($this) as $method) { + if (!strncmp("http_", $method, 5)) { + $method = strtoupper(substr($method, 5)); + if (method_exists($this, $method)) { + $allow[$method] = $method; + } + } + } + + // we can emulate a missing HEAD implemetation using GET + if (isset($allow["GET"])) + $allow["HEAD"] = "HEAD"; + + // no LOCK without checklok() + if (!method_exists($this, "checklock")) { + unset($allow["LOCK"]); + unset($allow["UNLOCK"]); + } + + return $allow; + } + + // }}} + + /** + * helper for property element creation + * + * @param string XML namespace (optional) + * @param string property name + * @param string property value + * @praram boolen property raw-flag + * @return array property array + */ + function mkprop() + { + $args = func_get_args(); + switch (count($args)) { + case 4: + return array('ns' => $args[0], + 'name' => $args[1], + 'val' => $args[2], + 'raw' => true); + case 3: + return array('ns' => $args[0], + 'name' => $args[1], + 'val' => $args[2]); + default: + return array('ns' => 'DAV:', + 'name' => $args[0], + 'val' => $args[1]); + } + } + + // {{{ _check_auth + + /** + * check authentication if check is implemented + * + * @param void + * @return bool true if authentication succeded or not necessary + */ + function _check_auth() + { + if (method_exists($this, "checkAuth")) { + // PEAR style method name + return $this->checkAuth(@$this->_SERVER["AUTH_TYPE"], + @$this->_SERVER["PHP_AUTH_USER"], + @$this->_SERVER["PHP_AUTH_PW"]); + } else if (method_exists($this, "check_auth")) { + // old (pre 1.0) method name + return $this->check_auth(@$this->_SERVER["AUTH_TYPE"], + @$this->_SERVER["PHP_AUTH_USER"], + @$this->_SERVER["PHP_AUTH_PW"]); + } else { + // no method found -> no authentication required + return true; + } + } + + // }}} + + // {{{ UUID stuff + + /** + * generate Unique Universal IDentifier for lock token + * + * @param void + * @return string a new UUID + */ + function _new_uuid() + { + // use uuid extension from PECL if available + if (function_exists("uuid_create")) { + return uuid_create(); + } + + // fallback + $uuid = md5(microtime().getmypid()); // this should be random enough for now + + // set variant and version fields for 'true' random uuid + $uuid{12} = "4"; + $n = 8 + (ord($uuid{16}) & 3); + $hex = "0123456789abcdef"; + $uuid{16} = $hex{$n}; + + // return formated uuid + return substr($uuid, 0, 8)."-" + . substr($uuid, 8, 4)."-" + . substr($uuid, 12, 4)."-" + . substr($uuid, 16, 4)."-" + . substr($uuid, 20); + } + + /** + * create a new opaque lock token as defined in RFC2518 + * + * @param void + * @return string new RFC2518 opaque lock token + */ + function _new_locktoken() + { + return "opaquelocktoken:".HTTP_WebDAV_Server::_new_uuid(); + } + + // }}} + + // {{{ WebDAV If: header parsing + + /** + * + * + * @param string header string to parse + * @param int current parsing position + * @return array next token (type and value) + */ + function _if_header_lexer($string, &$pos) + { + // skip whitespace + while (ctype_space($string{$pos})) { + ++$pos; + } + + // already at end of string? + if (strlen($string) <= $pos) { + return false; + } + + // get next character + $c = $string{$pos++}; + + // now it depends on what we found + switch ($c) { + case "<": + // URIs are enclosed in <...> + $pos2 = strpos($string, ">", $pos); + $uri = substr($string, $pos, $pos2 - $pos); + $pos = $pos2 + 1; + return array("URI", $uri); + + case "[": + //Etags are enclosed in [...] + if ($string{$pos} == "W") { + $type = "ETAG_WEAK"; + $pos += 2; + } else { + $type = "ETAG_STRONG"; + } + $pos2 = strpos($string, "]", $pos); + $etag = substr($string, $pos + 1, $pos2 - $pos - 2); + $pos = $pos2 + 1; + return array($type, $etag); + + case "N": + // "N" indicates negation + $pos += 2; + return array("NOT", "Not"); + + default: + // anything else is passed verbatim char by char + return array("CHAR", $c); + } + } + + /** + * parse If: header + * + * @param string header string + * @return array URIs and their conditions + */ + function _if_header_parser($str) + { + $pos = 0; + $len = strlen($str); + $uris = array(); + + // parser loop + while ($pos < $len) { + // get next token + $token = $this->_if_header_lexer($str, $pos); + + // check for URI + if ($token[0] == "URI") { + $uri = $token[1]; // remember URI + $token = $this->_if_header_lexer($str, $pos); // get next token + } else { + $uri = ""; + } + + // sanity check + if ($token[0] != "CHAR" || $token[1] != "(") { + return false; + } + + $list = array(); + $level = 1; + $not = ""; + while ($level) { + $token = $this->_if_header_lexer($str, $pos); + if ($token[0] == "NOT") { + $not = "!"; + continue; + } + switch ($token[0]) { + case "CHAR": + switch ($token[1]) { + case "(": + $level++; + break; + case ")": + $level--; + break; + default: + return false; + } + break; + + case "URI": + $list[] = $not."<$token[1]>"; + break; + + case "ETAG_WEAK": + $list[] = $not."[W/'$token[1]']>"; + break; + + case "ETAG_STRONG": + $list[] = $not."['$token[1]']>"; + break; + + default: + return false; + } + $not = ""; + } + + if (@is_array($uris[$uri])) { + $uris[$uri] = array_merge($uris[$uri], $list); + } else { + $uris[$uri] = $list; + } + } + + return $uris; + } + + /** + * check if conditions from "If:" headers are meat + * + * the "If:" header is an extension to HTTP/1.1 + * defined in RFC 2518 section 9.4 + * + * @param void + * @return void + */ + function _check_if_header_conditions() + { + if (isset($this->_SERVER["HTTP_IF"])) { + $this->_if_header_uris = + $this->_if_header_parser($this->_SERVER["HTTP_IF"]); + + foreach ($this->_if_header_uris as $uri => $conditions) { + if ($uri == "") { + $uri = $this->uri; + } + // all must match + $state = true; + foreach ($conditions as $condition) { + // lock tokens may be free form (RFC2518 6.3) + // but if opaquelocktokens are used (RFC2518 6.4) + // we have to check the format (litmus tests this) + if (!strncmp($condition, "$/', $condition)) { + $this->http_status("423 Locked"); + return false; + } + } + if (!$this->_check_uri_condition($uri, $condition)) { + $this->http_status("412 Precondition failed"); + $state = false; + break; + } + } + + // any match is ok + if ($state == true) { + return true; + } + } + return false; + } + return true; + } + + /** + * Check a single URI condition parsed from an if-header + * + * Check a single URI condition parsed from an if-header + * + * @abstract + * @param string $uri URI to check + * @param string $condition Condition to check for this URI + * @returns bool Condition check result + */ + function _check_uri_condition($uri, $condition) + { + // not really implemented here, + // implementations must override + + // a lock token can never be from the DAV: scheme + // litmus uses DAV:no-lock in some tests + if (!strncmp(" ignored for now + if (method_exists($this, "checkLock")) { + // is locked? + $lock = $this->checkLock($path); + + // ... and lock is not owned? + if (is_array($lock) && count($lock)) { + // FIXME doesn't check uri restrictions yet + if (!isset($this->_SERVER["HTTP_IF"]) || !strstr($this->_SERVER["HTTP_IF"], $lock["token"])) { + if (!$exclusive_only || ($lock["scope"] !== "shared")) + return false; + } + } + } + return true; + } + + + // }}} + + + /** + * Generate lockdiscovery reply from checklock() result + * + * @param string resource path to check + * @return string lockdiscovery response + */ + function lockdiscovery($path) + { + // no lock support without checklock() method + if (!method_exists($this, "checklock")) { + return ""; + } + + // collect response here + $activelocks = ""; + + // get checklock() reply + $lock = $this->checklock($path); + + // generate block for returned data + if (is_array($lock) && count($lock)) { + // check for 'timeout' or 'expires' + if (!empty($lock["expires"])) { + $timeout = "Second-".($lock["expires"] - time()); + } else if (!empty($lock["timeout"])) { + $timeout = "Second-$lock[timeout]"; + } else { + $timeout = "Infinite"; + } + + // genreate response block + if ($this->crrnd) + { + $activelocks.= " + + <$lock[scope]/> + <$lock[type]/> + $lock[depth] + $lock[owner] + $timeout + $lock[token] + + "; + } + else + { + $activelocks.= " + + + + $lock[depth] + $lock[owner] + $timeout + $lock[token] + + "; + } + } + + // return generated response + //error_log(__METHOD__."\n".print_r($activelocks,true)); + return $activelocks; + } + + /** + * set HTTP return status and mirror it in a private header + * + * @param string status code and message + * @return void + */ + function http_status($status) + { + // simplified success case + if ($status === true) { + $status = "200 OK"; + } + + // remember status + $this->_http_status = $status; + + // generate HTTP status response + header("HTTP/1.1 $status"); + header("X-WebDAV-Status: $status", true); + } + + /** + * private minimalistic version of PHP urlencode() + * + * only blanks and XML special chars must be encoded here + * full urlencode() encoding confuses some clients ... + * + * @param string URL to encode + * @return string encoded URL + */ + function _urlencode($url) + { + // cadaver (and probably all neon using agents) need a more complete url encoding + // otherwise special chars like "$,()'" in filenames do NOT work + if (strpos($_SERVER['HTTP_USER_AGENT'],'neon') !== false) + { + return strtr(rawurlencode($url),array( + '%2F' => '/', + '%3A' => ':', + )); + } + //error_log( __METHOD__."\n" .print_r($url,true)); + return strtr($url, array(' ' => '%20', + '&' => '%26', + '<' => '%3C', + '>' => '%3E', + '+' => '%2B', + )); + } + + /** + * private version of PHP urldecode + * + * not really needed but added for completenes + * + * @param string URL to decode + * @return string decoded URL + */ + function _urldecode($path) + { + return urldecode($path); + } + + /** + * Encode a hierarchical properties like: + * + * + * + * + * + * + * + * + * + * + * + * + * + * + * @param array $props + * @param string $ns + * @param strin $ns_defs + * @param array $ns_hash + * @return string + */ + function _hierarchical_prop_encode(array $props, $ns, &$ns_defs, array &$ns_hash) + { + $ret = ''; + + //error_log(__METHOD__.'('.array2string($props).')'); + if (isset($props['name'])) $props = array($props); + + foreach($props as $prop) + { + if (!isset($ns_hash[$prop['ns']])) // unknown namespace + { + // register namespace + $ns_name = 'ns'.(count($ns_hash) + 1); + $ns_hash[$prop['ns']] = $ns_name; + $ns_defs .= ' xmlns:'.$ns_name.'="'.$prop['ns'].'"'; + } + if (is_array($prop['val'])) + { + $subprop = $prop['val']; + if (isset($subprop['ns']) || isset($subprop[0]['ns'])) + { + $ret .= '<'.($prop['ns'] == $ns ? ($this->cnrnd ? $ns_hash[$ns].':' : '') : $ns_hash[$prop['ns']].':').$prop['name']. + (empty($prop['val']) ? '/>' : '>'.$this->_hierarchical_prop_encode($prop['val'], $prop['ns'], $ns_defs, $ns_hash). + 'cnrnd ? $ns_hash[$ns].':' : '') : ($this->crrnd ? '' : $ns_hash[$prop['ns']].':')).$prop['name'].'>'); + } + else // val contains only attributes, no value + { + $vals = ''; + + foreach($subprop as $attr => $val) + { + $vals .= ' '.$attr.'="'.htmlspecialchars($val).'"'; + } + + $ret .= '<'.($prop['ns'] == $ns ? ($this->cnrnd ? $ns_hash[$ns].':' : '') : $ns_hash[$prop['ns']].':').$prop['name']. + $vals .'/>'; + } + } + else + { + if (empty($prop['val'])) + { + $val = ''; + } + else + { + if(isset($prop['raw'])) + { + $val = $this->_prop_encode(''); + } else { + $val = $this->_prop_encode(htmlspecialchars($prop['val'])); + } } + + $ret .= '<'.($prop['ns'] == $ns ? ($this->cnrnd ? $ns_hash[$ns].':' : '') : $ns_hash[$prop['ns']].':').$prop['name']. + (empty($prop['val']) ? ' />' : '>'.$val.'cnrnd ? $ns_hash[$ns].':' : '') : ($this->crrnd ? '' : $ns_hash[$prop['ns']].':')).$prop['name'].'>'); + } + } + + //error_log(__METHOD__.'('.array2string($props).') = '.array2string($ret)); + return $ret; + } + + /** + * UTF-8 encode property values if not already done so + * + * @param string text to encode + * @return string utf-8 encoded text + */ + function _prop_encode($text) + { + //error_log( __METHOD__."\n" .print_r($text,true)); + //error_log("prop-encode:" . print_r($this->_prop_encoding,true)); + + switch (strtolower($this->_prop_encoding)) { + case "utf-8": + //error_log( __METHOD__."allready encoded\n" .print_r($text,true)); + return $text; + case "iso-8859-1": + case "iso-8859-15": + case "latin-1": + default: + error_log( __METHOD__."utf8 encode\n" .print_r(utf8_encode($text),true)); + return utf8_encode($text); + } + } + + /** + * Slashify - make sure path ends in a slash + * + * @param string directory path + * @returns string directory path wiht trailing slash + */ + function _slashify($path) + { + //error_log(__METHOD__." called with $path"); + if ($path[$this->bytes($path)-1] != '/') { + //error_log(__METHOD__." added slash at the end of path"); + $path = $path."/"; + } + return $path; + } + + /** + * Unslashify - make sure path doesn't in a slash + * + * @param string directory path + * @returns string directory path wihtout trailing slash + */ + function _unslashify($path) + { + //error_log(__METHOD__." called with $path"); + if ($path[$this->bytes($path)-1] == '/') { + $path = substr($path, 0, -1); + //error_log(__METHOD__." removed slash at the end of path"); + } + return $path; + } + + /** + * Merge two pathes, make sure there is exactly one slash between them + * + * @param string parent path + * @param string child path + * @return string merged path + */ + function _mergePathes($parent, $child) + { + //error_log("merge called :\n$parent \n$child\n" . function_backtrace()); + //error_log("merge :\n".print_r($this->_mergePathes($this->_SERVER["SCRIPT_NAME"], $this->path)true)); + if ($child{0} == '/') { + return $this->_unslashify($parent).$child; + } else { + return $this->_slashify($parent).$child; + } + } + + /** + * mbstring.func_overload save strlen version: counting the bytes not the chars + * + * @param string $str + * @return int + */ + function bytes($str) + { + static $func_overload; + + if (is_null($func_overload)) + { + $func_overload = @extension_loaded('mbstring') ? ini_get('mbstring.func_overload') : 0; + } + return $func_overload & 2 ? mb_strlen($str,'ascii') : strlen($str); + } +} + +/* + * Local variables: + * tab-width: 4 + * c-basic-offset: 4 + * End: + */ +?>