mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-11-24 00:43:20 +01:00
805 lines
24 KiB
PHP
805 lines
24 KiB
PHP
<?php
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require_once "HTTP/WebDAV/Server.php";
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require_once "System.php";
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/**
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* Filesystem access using WebDAV
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*
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* @access public
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* @author Hartmut Holzgraefe <hartmut@php.net>
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* @version @package-version@
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*/
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class HTTP_WebDAV_Server_Filesystem extends HTTP_WebDAV_Server
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{
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/**
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* Root directory for WebDAV access
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*
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* Defaults to webserver document root (set by ServeRequest)
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*
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* @access private
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* @var string
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*/
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var $base = "";
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/**
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* MySQL Host where property and locking information is stored
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*
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* @access private
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* @var string
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*/
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var $db_host = "localhost";
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/**
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* MySQL database for property/locking information storage
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*
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* @access private
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* @var string
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*/
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var $db_name = "webdav";
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/**
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* MySQL table name prefix
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*
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* @access private
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* @var string
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*/
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var $db_prefix = "";
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/**
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* MySQL user for property/locking db access
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*
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* @access private
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* @var string
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*/
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var $db_user = "root";
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/**
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* MySQL password for property/locking db access
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*
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* @access private
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* @var string
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*/
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var $db_passwd = "";
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/**
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* Serve a webdav request
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*
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* @access public
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* @param string
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*/
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function ServeRequest($base = false)
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{
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// special treatment for litmus compliance test
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// reply on its identifier header
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// not needed for the test itself but eases debugging
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foreach (apache_request_headers() as $key => $value) {
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if (stristr($key, "litmus")) {
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error_log("Litmus test $value");
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header("X-Litmus-reply: ".$value);
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}
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}
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// set root directory, defaults to webserver document root if not set
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if ($base) {
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$this->base = realpath($base); // TODO throw if not a directory
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} else if (!$this->base) {
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$this->base = $this->_SERVER['DOCUMENT_ROOT'];
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}
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// establish connection to property/locking db
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mysql_connect($this->db_host, $this->db_user, $this->db_passwd) or die(mysql_error());
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mysql_select_db($this->db_name) or die(mysql_error());
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// TODO throw on connection problems
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// let the base class do all the work
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parent::ServeRequest();
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}
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/**
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* No authentication is needed here
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*
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* @access private
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* @param string HTTP Authentication type (Basic, Digest, ...)
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* @param string Username
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* @param string Password
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* @return bool true on successful authentication
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*/
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function check_auth($type, $user, $pass)
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{
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return true;
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}
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/**
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* PROPFIND method handler
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*
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* @param array general parameter passing array
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* @param array return array for file properties
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* @return bool true on success
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*/
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function PROPFIND(&$options, &$files)
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{
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// get absolute fs path to requested resource
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$fspath = $this->base . $options["path"];
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// sanity check
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if (!file_exists($fspath)) {
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return false;
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}
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// prepare property array
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$files["files"] = array();
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// store information for the requested path itself
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$files["files"][] = $this->fileinfo($options["path"]);
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// information for contained resources requested?
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if (!empty($options["depth"])) { // TODO check for is_dir() first?
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// make sure path ends with '/'
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$options["path"] = $this->_slashify($options["path"]);
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// try to open directory
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$handle = @opendir($fspath);
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if ($handle) {
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// ok, now get all its contents
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while ($filename = readdir($handle)) {
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if ($filename != "." && $filename != "..") {
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$files["files"][] = $this->fileinfo($options["path"].$filename);
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}
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}
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// TODO recursion needed if "Depth: infinite"
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closedir($handle);
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}
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}
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// ok, all done
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return true;
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}
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/**
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* Get properties for a single file/resource
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*
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* @param string resource path
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* @return array resource properties
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*/
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function fileinfo($path)
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{
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// map URI path to filesystem path
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$fspath = $this->base . $path;
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// create result array
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$info = array();
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// TODO remove slash append code when base clase is able to do it itself
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$info["path"] = is_dir($fspath) ? $this->_slashify($path) : $path;
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$info["props"] = array();
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// no special beautified displayname here ...
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$info["props"][] = $this->mkprop("displayname", strtoupper($path));
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// creation and modification time
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$info["props"][] = $this->mkprop("creationdate", filectime($fspath));
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$info["props"][] = $this->mkprop("getlastmodified", filemtime($fspath));
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// type and size (caller already made sure that path exists)
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if (is_dir($fspath)) {
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// directory (WebDAV collection)
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$info["props"][] = $this->mkprop("resourcetype", array($this->mkprop('collection', '')));
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$info["props"][] = $this->mkprop("getcontenttype", "httpd/unix-directory");
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} else {
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// plain file (WebDAV resource)
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$info["props"][] = $this->mkprop("resourcetype", "");
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if (is_readable($fspath)) {
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$info["props"][] = $this->mkprop("getcontenttype", $this->_mimetype($fspath));
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} else {
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$info["props"][] = $this->mkprop("getcontenttype", "application/x-non-readable");
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}
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$info["props"][] = $this->mkprop("getcontentlength", filesize($fspath));
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}
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// get additional properties from database
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$query = "SELECT ns, name, value
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FROM {$this->db_prefix}properties
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WHERE path = '$path'";
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$res = mysql_query($query);
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while ($row = mysql_fetch_assoc($res)) {
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$info["props"][] = $this->mkprop($row["ns"], $row["name"], $row["value"]);
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}
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mysql_free_result($res);
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return $info;
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}
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/**
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* detect if a given program is found in the search PATH
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*
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* helper function used by _mimetype() to detect if the
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* external 'file' utility is available
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*
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* @param string program name
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* @param string optional search path, defaults to $PATH
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* @return bool true if executable program found in path
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*/
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function _can_execute($name, $path = false)
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{
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// path defaults to PATH from environment if not set
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if ($path === false) {
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$path = getenv("PATH");
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}
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// check method depends on operating system
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if (!strncmp(PHP_OS, "WIN", 3)) {
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// on Windows an appropriate COM or EXE file needs to exist
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$exts = array(".exe", ".com");
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$check_fn = "file_exists";
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} else {
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// anywhere else we look for an executable file of that name
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$exts = array("");
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$check_fn = "is_executable";
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}
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// now check the directories in the path for the program
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foreach (explode(PATH_SEPARATOR, $path) as $dir) {
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// skip invalid path entries
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if (!file_exists($dir)) continue;
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if (!is_dir($dir)) continue;
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// and now look for the file
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foreach ($exts as $ext) {
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if ($check_fn("$dir/$name".$ext)) return true;
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}
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}
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return false;
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}
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/**
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* try to detect the mime type of a file
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*
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* @param string file path
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* @return string guessed mime type
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*/
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function _mimetype($fspath)
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{
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if (@is_dir($fspath)) {
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// directories are easy
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return "httpd/unix-directory";
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} else if (function_exists("mime_content_type")) {
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// use mime magic extension if available
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$mime_type = mime_content_type($fspath);
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} else if ($this->_can_execute("file")) {
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// it looks like we have a 'file' command,
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// lets see it it does have mime support
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$fp = popen("file -i '$fspath' 2>/dev/null", "r");
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$reply = fgets($fp);
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pclose($fp);
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// popen will not return an error if the binary was not found
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// and find may not have mime support using "-i"
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// so we test the format of the returned string
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// the reply begins with the requested filename
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if (!strncmp($reply, "$fspath: ", strlen($fspath)+2)) {
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$reply = substr($reply, strlen($fspath)+2);
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// followed by the mime type (maybe including options)
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if (preg_match('|^[[:alnum:]_-]+/[[:alnum:]_-]+;?.*|', $reply, $matches)) {
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$mime_type = $matches[0];
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}
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}
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}
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if (empty($mime_type)) {
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// Fallback solution: try to guess the type by the file extension
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// TODO: add more ...
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// TODO: it has been suggested to delegate mimetype detection
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// to apache but this has at least three issues:
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// - works only with apache
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// - needs file to be within the document tree
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// - requires apache mod_magic
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// TODO: can we use the registry for this on Windows?
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// OTOH if the server is Windos the clients are likely to
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// be Windows, too, and tend do ignore the Content-Type
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// anyway (overriding it with information taken from
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// the registry)
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// TODO: have a seperate PEAR class for mimetype detection?
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switch (strtolower(strrchr(basename($fspath), "."))) {
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case ".html":
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$mime_type = "text/html";
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break;
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case ".gif":
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$mime_type = "image/gif";
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break;
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case ".jpg":
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$mime_type = "image/jpeg";
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break;
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default:
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$mime_type = "application/octet-stream";
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break;
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}
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}
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return $mime_type;
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}
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/**
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* GET method handler
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*
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* @param array parameter passing array
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* @return bool true on success
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*/
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function GET(&$options)
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{
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// get absolute fs path to requested resource
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$fspath = $this->base . $options["path"];
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// sanity check
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if (!file_exists($fspath)) return false;
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// is this a collection?
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if (is_dir($fspath)) {
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return $this->GetDir($fspath, $options);
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}
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// detect resource type
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$options['mimetype'] = $this->_mimetype($fspath);
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// detect modification time
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// see rfc2518, section 13.7
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// some clients seem to treat this as a reverse rule
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// requiering a Last-Modified header if the getlastmodified header was set
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$options['mtime'] = filemtime($fspath);
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// detect resource size
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$options['size'] = filesize($fspath);
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// no need to check result here, it is handled by the base class
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if (!($options['stream'] = fopen($fspath, "r")))
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{
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return '403 Forbidden';
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}
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return true;
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}
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/**
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* GET method handler for directories
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*
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* This is a very simple mod_index lookalike.
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* See RFC 2518, Section 8.4 on GET/HEAD for collections
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*
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* @param string directory path
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* @return void function has to handle HTTP response itself
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*/
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function GetDir($fspath, &$options)
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{
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$path = $this->_slashify($options["path"]);
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if ($path != $options["path"]) {
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header("Location: ".$this->base_uri.$path);
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exit;
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}
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// fixed width directory column format
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$format = "%15s %-19s %-s\n";
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$handle = @opendir($fspath);
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if (!$handle) {
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return false;
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}
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echo "<html><head><title>Index of ".htmlspecialchars($options['path'])."</title></head>\n";
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echo "<h1>Index of ".htmlspecialchars($options['path'])."</h1>\n";
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echo "<pre>";
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printf($format, "Size", "Last modified", "Filename");
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echo "<hr>";
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while ($filename = readdir($handle)) {
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if ($filename != "." && $filename != "..") {
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$fullpath = $fspath.$filename;
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$name = htmlspecialchars($filename);
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printf($format,
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number_format(filesize($fullpath)),
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strftime("%Y-%m-%d %H:%M:%S", filemtime($fullpath)),
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"<a href='$name'>$name</a>");
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}
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}
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echo "</pre>";
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closedir($handle);
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echo "</html>\n";
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exit;
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}
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/**
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* PUT method handler
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*
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* @param array parameter passing array
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* @return bool true on success
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*/
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function PUT(&$options)
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{
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$fspath = $this->base . $options["path"];
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if (!@is_dir(dirname($fspath))) {
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return "409 Conflict";
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}
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$options["new"] = ! file_exists($fspath);
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$fp = fopen($fspath, "w");
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return $fp;
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}
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/**
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* MKCOL method handler
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*
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* @param array general parameter passing array
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* @return bool true on success
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*/
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function MKCOL($options)
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{
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$path = $this->base .$options["path"];
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$parent = dirname($path);
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$name = basename($path);
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if (!file_exists($parent)) {
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return "409 Conflict";
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}
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if (!is_dir($parent)) {
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return "403 Forbidden";
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}
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if ( file_exists($parent."/".$name) ) {
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return "405 Method not allowed";
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}
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if (!empty($this->_SERVER["CONTENT_LENGTH"])) { // no body parsing yet
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return "415 Unsupported media type";
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}
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$stat = mkdir($parent."/".$name, 0777);
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if (!$stat) {
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return "403 Forbidden";
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}
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return ("201 Created");
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}
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/**
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* DELETE method handler
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*
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* @param array general parameter passing array
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* @return bool true on success
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*/
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function DELETE($options)
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{
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$path = $this->base . "/" .$options["path"];
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if (!file_exists($path)) {
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return "404 Not found";
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}
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if (is_dir($path)) {
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$query = "DELETE FROM {$this->db_prefix}properties
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WHERE path LIKE '".$this->_slashify($options["path"])."%'";
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mysql_query($query);
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System::rm("-rf $path");
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} else {
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unlink($path);
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}
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$query = "DELETE FROM {$this->db_prefix}properties
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WHERE path = '$options[path]'";
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mysql_query($query);
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return "204 No Content";
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}
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/**
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* MOVE method handler
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*
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* @param array general parameter passing array
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* @return bool true on success
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*/
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function MOVE($options)
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{
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return $this->COPY($options, true);
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}
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/**
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* COPY method handler
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*
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* @param array general parameter passing array
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* @return bool true on success
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*/
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function COPY($options, $del=false)
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{
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// TODO Property updates still broken (Litmus should detect this?)
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if (!empty($this->_SERVER["CONTENT_LENGTH"])) { // no body parsing yet
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return "415 Unsupported media type";
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}
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// no copying to different WebDAV Servers yet
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if (isset($options["dest_url"])) {
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return "502 bad gateway";
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}
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$source = $this->base .$options["path"];
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if (!file_exists($source)) return "404 Not found";
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$dest = $this->base . $options["dest"];
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$new = !file_exists($dest);
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$existing_col = false;
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if (!$new) {
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if ($del && is_dir($dest)) {
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if (!$options["overwrite"]) {
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return "412 precondition failed";
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}
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$dest .= basename($source);
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if (file_exists($dest)) {
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$options["dest"] .= basename($source);
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} else {
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$new = true;
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$existing_col = true;
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}
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}
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}
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if (!$new) {
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if ($options["overwrite"]) {
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$stat = $this->DELETE(array("path" => $options["dest"]));
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if (($stat{0} != "2") && (substr($stat, 0, 3) != "404")) {
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return $stat;
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}
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} else {
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return "412 precondition failed";
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}
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}
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if (is_dir($source) && ($options["depth"] != "infinity")) {
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// RFC 2518 Section 9.2, last paragraph
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return "400 Bad request";
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}
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if ($del) {
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if (!rename($source, $dest)) {
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return "500 Internal server error";
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}
|
|
$destpath = $this->_unslashify($options["dest"]);
|
|
if (is_dir($source)) {
|
|
$query = "UPDATE {$this->db_prefix}properties
|
|
SET path = REPLACE(path, '".$options["path"]."', '".$destpath."')
|
|
WHERE path LIKE '".$this->_slashify($options["path"])."%'";
|
|
mysql_query($query);
|
|
}
|
|
|
|
$query = "UPDATE {$this->db_prefix}properties
|
|
SET path = '".$destpath."'
|
|
WHERE path = '".$options["path"]."'";
|
|
mysql_query($query);
|
|
} else {
|
|
if (is_dir($source)) {
|
|
$files = System::find($source);
|
|
$files = array_reverse($files);
|
|
} else {
|
|
$files = array($source);
|
|
}
|
|
|
|
if (!is_array($files) || empty($files)) {
|
|
return "500 Internal server error";
|
|
}
|
|
|
|
|
|
foreach ($files as $file) {
|
|
if (is_dir($file)) {
|
|
$file = $this->_slashify($file);
|
|
}
|
|
|
|
$destfile = str_replace($source, $dest, $file);
|
|
|
|
if (is_dir($file)) {
|
|
if (!is_dir($destfile)) {
|
|
// TODO "mkdir -p" here? (only natively supported by PHP 5)
|
|
if (!@mkdir($destfile)) {
|
|
return "409 Conflict";
|
|
}
|
|
}
|
|
} else {
|
|
if (!@copy($file, $destfile)) {
|
|
return "409 Conflict";
|
|
}
|
|
}
|
|
}
|
|
|
|
$query = "INSERT INTO {$this->db_prefix}properties
|
|
SELECT *
|
|
FROM {$this->db_prefix}properties
|
|
WHERE path = '".$options['path']."'";
|
|
}
|
|
|
|
return ($new && !$existing_col) ? "201 Created" : "204 No Content";
|
|
}
|
|
|
|
/**
|
|
* PROPPATCH method handler
|
|
*
|
|
* @param array general parameter passing array
|
|
* @return bool true on success
|
|
*/
|
|
function PROPPATCH(&$options)
|
|
{
|
|
global $prefs, $tab;
|
|
|
|
$msg = "";
|
|
$path = $options["path"];
|
|
$dir = dirname($path)."/";
|
|
$base = basename($path);
|
|
|
|
foreach ($options["props"] as $key => $prop) {
|
|
if ($prop["ns"] == "DAV:") {
|
|
$options["props"][$key]['status'] = "403 Forbidden";
|
|
} else {
|
|
if (isset($prop["val"])) {
|
|
$query = "REPLACE INTO {$this->db_prefix}properties
|
|
SET path = '$options[path]'
|
|
, name = '$prop[name]'
|
|
, ns= '$prop[ns]'
|
|
, value = '$prop[val]'";
|
|
} else {
|
|
$query = "DELETE FROM {$this->db_prefix}properties
|
|
WHERE path = '$options[path]'
|
|
AND name = '$prop[name]'
|
|
AND ns = '$prop[ns]'";
|
|
}
|
|
mysql_query($query);
|
|
}
|
|
}
|
|
|
|
return "";
|
|
}
|
|
|
|
|
|
/**
|
|
* LOCK method handler
|
|
*
|
|
* @param array general parameter passing array
|
|
* @return bool true on success
|
|
*/
|
|
function LOCK(&$options)
|
|
{
|
|
// get absolute fs path to requested resource
|
|
$fspath = $this->base . $options["path"];
|
|
|
|
// TODO recursive locks on directories not supported yet
|
|
if (is_dir($fspath) && !empty($options["depth"])) {
|
|
return "409 Conflict";
|
|
}
|
|
|
|
$options["timeout"] = time()+300; // 5min. hardcoded
|
|
|
|
if (isset($options["update"])) { // Lock Update
|
|
$where = "WHERE path = '$options[path]' AND token = '$options[update]'";
|
|
|
|
$query = "SELECT owner, exclusivelock FROM {$this->db_prefix}locks $where";
|
|
$res = mysql_query($query);
|
|
$row = mysql_fetch_assoc($res);
|
|
mysql_free_result($res);
|
|
|
|
if (is_array($row)) {
|
|
$query = "UPDATE {$this->db_prefix}locks
|
|
SET expires = '$options[timeout]'
|
|
, modified = ".time()."
|
|
$where";
|
|
mysql_query($query);
|
|
|
|
$options['owner'] = $row['owner'];
|
|
$options['scope'] = $row["exclusivelock"] ? "exclusive" : "shared";
|
|
$options['type'] = $row["exclusivelock"] ? "write" : "read";
|
|
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
$query = "INSERT INTO {$this->db_prefix}locks
|
|
SET token = '$options[locktoken]'
|
|
, path = '$options[path]'
|
|
, created = ".time()."
|
|
, modified = ".time()."
|
|
, owner = '$options[owner]'
|
|
, expires = '$options[timeout]'
|
|
, exclusivelock = " .($options['scope'] === "exclusive" ? "1" : "0")
|
|
;
|
|
mysql_query($query);
|
|
|
|
return mysql_affected_rows() ? "200 OK" : "409 Conflict";
|
|
}
|
|
|
|
/**
|
|
* UNLOCK method handler
|
|
*
|
|
* @param array general parameter passing array
|
|
* @return bool true on success
|
|
*/
|
|
function UNLOCK(&$options)
|
|
{
|
|
$query = "DELETE FROM {$this->db_prefix}locks
|
|
WHERE path = '$options[path]'
|
|
AND token = '$options[token]'";
|
|
mysql_query($query);
|
|
|
|
return mysql_affected_rows() ? "204 No Content" : "409 Conflict";
|
|
}
|
|
|
|
/**
|
|
* checkLock() helper
|
|
*
|
|
* @param string resource path to check for locks
|
|
* @return bool true on success
|
|
*/
|
|
function checkLock($path)
|
|
{
|
|
$result = false;
|
|
|
|
$query = "SELECT owner, token, created, modified, expires, exclusivelock
|
|
FROM {$this->db_prefix}locks
|
|
WHERE path = '$path'
|
|
";
|
|
$res = mysql_query($query);
|
|
|
|
if ($res) {
|
|
$row = mysql_fetch_array($res);
|
|
mysql_free_result($res);
|
|
|
|
if ($row) {
|
|
$result = array( "type" => "write",
|
|
"scope" => $row["exclusivelock"] ? "exclusive" : "shared",
|
|
"depth" => 0,
|
|
"owner" => $row['owner'],
|
|
"token" => $row['token'],
|
|
"created" => $row['created'],
|
|
"modified" => $row['modified'],
|
|
"expires" => $row['expires']
|
|
);
|
|
}
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
|
|
/**
|
|
* create database tables for property and lock storage
|
|
*
|
|
* @param void
|
|
* @return bool true on success
|
|
*/
|
|
function create_database()
|
|
{
|
|
// TODO
|
|
return false;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode:nil
|
|
* End:
|
|
*/
|