friendica-addons/dav/SabreDAV/lib/Sabre/DAV/Browser/Plugin.php

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2012-06-03 18:19:28 +00:00
<?php
/**
* Browser Plugin
*
* This plugin provides a html representation, so that a WebDAV server may be accessed
* using a browser.
*
* The class intercepts GET requests to collection resources and generates a simple
* html index.
*
* @package Sabre
* @subpackage DAV
* @copyright Copyright (C) 2007-2012 Rooftop Solutions. All rights reserved.
* @author Evert Pot (http://www.rooftopsolutions.nl/)
* @license http://code.google.com/p/sabredav/wiki/License Modified BSD License
*/
class Sabre_DAV_Browser_Plugin extends Sabre_DAV_ServerPlugin {
/**
* List of default icons for nodes.
*
* This is an array with class / interface names as keys, and asset names
* as values.
*
* The evaluation order is reversed. The last item in the list gets
* precendence.
*
* @var array
*/
public $iconMap = array(
'Sabre_DAV_IFile' => 'icons/file',
'Sabre_DAV_ICollection' => 'icons/collection',
'Sabre_DAVACL_IPrincipal' => 'icons/principal',
'Sabre_CalDAV_ICalendar' => 'icons/calendar',
'Sabre_CardDAV_IAddressBook' => 'icons/addressbook',
'Sabre_CardDAV_ICard' => 'icons/card',
);
/**
* The file extension used for all icons
*
* @var string
*/
public $iconExtension = '.png';
/**
* reference to server class
*
* @var Sabre_DAV_Server
*/
protected $server;
/**
* enablePost turns on the 'actions' panel, which allows people to create
* folders and upload files straight from a browser.
*
* @var bool
*/
protected $enablePost = true;
/**
* By default the browser plugin will generate a favicon and other images.
* To turn this off, set this property to false.
*
* @var bool
*/
protected $enableAssets = true;
/**
* Creates the object.
*
* By default it will allow file creation and uploads.
* Specify the first argument as false to disable this
*
* @param bool $enablePost
* @param bool $enableAssets
*/
public function __construct($enablePost=true, $enableAssets = true) {
$this->enablePost = $enablePost;
$this->enableAssets = $enableAssets;
}
/**
* Initializes the plugin and subscribes to events
*
* @param Sabre_DAV_Server $server
* @return void
*/
public function initialize(Sabre_DAV_Server $server) {
$this->server = $server;
$this->server->subscribeEvent('beforeMethod',array($this,'httpGetInterceptor'));
$this->server->subscribeEvent('onHTMLActionsPanel', array($this, 'htmlActionsPanel'),200);
if ($this->enablePost) $this->server->subscribeEvent('unknownMethod',array($this,'httpPOSTHandler'));
}
/**
* This method intercepts GET requests to collections and returns the html
*
* @param string $method
* @param string $uri
* @return bool
*/
public function httpGetInterceptor($method, $uri) {
if ($method !== 'GET') return true;
// We're not using straight-up $_GET, because we want everything to be
// unit testable.
$getVars = array();
parse_str($this->server->httpRequest->getQueryString(), $getVars);
if (isset($getVars['sabreAction']) && $getVars['sabreAction'] === 'asset' && isset($getVars['assetName'])) {
$this->serveAsset($getVars['assetName']);
return false;
}
try {
$node = $this->server->tree->getNodeForPath($uri);
} catch (Sabre_DAV_Exception_NotFound $e) {
// We're simply stopping when the file isn't found to not interfere
// with other plugins.
return;
}
if ($node instanceof Sabre_DAV_IFile)
return;
$this->server->httpResponse->sendStatus(200);
$this->server->httpResponse->setHeader('Content-Type','text/html; charset=utf-8');
$this->server->httpResponse->sendBody(
$this->generateDirectoryIndex($uri)
);
return false;
}
/**
* Handles POST requests for tree operations.
*
* @param string $method
* @param string $uri
* @return bool
*/
public function httpPOSTHandler($method, $uri) {
if ($method!='POST') return;
$contentType = $this->server->httpRequest->getHeader('Content-Type');
list($contentType) = explode(';', $contentType);
if ($contentType !== 'application/x-www-form-urlencoded' &&
$contentType !== 'multipart/form-data') {
return;
}
$postVars = $this->server->httpRequest->getPostVars();
if (!isset($postVars['sabreAction']))
return;
if ($this->server->broadcastEvent('onBrowserPostAction', array($uri, $postVars['sabreAction'], $postVars))) {
switch($postVars['sabreAction']) {
case 'mkcol' :
if (isset($postVars['name']) && trim($postVars['name'])) {
// Using basename() because we won't allow slashes
list(, $folderName) = Sabre_DAV_URLUtil::splitPath(trim($postVars['name']));
$this->server->createDirectory($uri . '/' . $folderName);
}
break;
case 'put' :
if ($_FILES) $file = current($_FILES);
else break;
list(, $newName) = Sabre_DAV_URLUtil::splitPath(trim($file['name']));
if (isset($postVars['name']) && trim($postVars['name']))
$newName = trim($postVars['name']);
// Making sure we only have a 'basename' component
list(, $newName) = Sabre_DAV_URLUtil::splitPath($newName);
if (is_uploaded_file($file['tmp_name'])) {
$this->server->createFile($uri . '/' . $newName, fopen($file['tmp_name'],'r'));
}
break;
}
}
$this->server->httpResponse->setHeader('Location',$this->server->httpRequest->getUri());
$this->server->httpResponse->sendStatus(302);
return false;
}
/**
* Escapes a string for html.
*
* @param string $value
* @return string
*/
public function escapeHTML($value) {
return htmlspecialchars($value,ENT_QUOTES,'UTF-8');
}
/**
* Generates the html directory index for a given url
*
* @param string $path
* @return string
*/
public function generateDirectoryIndex($path) {
$version = '';
if (Sabre_DAV_Server::$exposeVersion) {
$version = Sabre_DAV_Version::VERSION ."-". Sabre_DAV_Version::STABILITY;
}
$html = "<html>
<head>
<title>Index for " . $this->escapeHTML($path) . "/ - SabreDAV " . $version . "</title>
<style type=\"text/css\">
body { Font-family: arial}
h1 { font-size: 150% }
</style>
";
if ($this->enableAssets) {
$html.='<link rel="shortcut icon" href="'.$this->getAssetUrl('favicon.ico').'" type="image/vnd.microsoft.icon" />';
}
$html .= "</head>
<body>
<h1>Index for " . $this->escapeHTML($path) . "/</h1>
<table>
<tr><th width=\"24\"></th><th>Name</th><th>Type</th><th>Size</th><th>Last modified</th></tr>
<tr><td colspan=\"5\"><hr /></td></tr>";
$files = $this->server->getPropertiesForPath($path,array(
'{DAV:}displayname',
'{DAV:}resourcetype',
'{DAV:}getcontenttype',
'{DAV:}getcontentlength',
'{DAV:}getlastmodified',
),1);
$parent = $this->server->tree->getNodeForPath($path);
if ($path) {
list($parentUri) = Sabre_DAV_URLUtil::splitPath($path);
$fullPath = Sabre_DAV_URLUtil::encodePath($this->server->getBaseUri() . $parentUri);
$icon = $this->enableAssets?'<a href="' . $fullPath . '"><img src="' . $this->getAssetUrl('icons/parent' . $this->iconExtension) . '" width="24" alt="Parent" /></a>':'';
$html.= "<tr>
<td>$icon</td>
<td><a href=\"{$fullPath}\">..</a></td>
<td>[parent]</td>
<td></td>
<td></td>
</tr>";
}
foreach($files as $file) {
// This is the current directory, we can skip it
if (rtrim($file['href'],'/')==$path) continue;
list(, $name) = Sabre_DAV_URLUtil::splitPath($file['href']);
$type = null;
if (isset($file[200]['{DAV:}resourcetype'])) {
$type = $file[200]['{DAV:}resourcetype']->getValue();
// resourcetype can have multiple values
if (!is_array($type)) $type = array($type);
foreach($type as $k=>$v) {
// Some name mapping is preferred
switch($v) {
case '{DAV:}collection' :
$type[$k] = 'Collection';
break;
case '{DAV:}principal' :
$type[$k] = 'Principal';
break;
case '{urn:ietf:params:xml:ns:carddav}addressbook' :
$type[$k] = 'Addressbook';
break;
case '{urn:ietf:params:xml:ns:caldav}calendar' :
$type[$k] = 'Calendar';
break;
case '{urn:ietf:params:xml:ns:caldav}schedule-inbox' :
$type[$k] = 'Schedule Inbox';
break;
case '{urn:ietf:params:xml:ns:caldav}schedule-outbox' :
$type[$k] = 'Schedule Outbox';
break;
case '{http://calendarserver.org/ns/}calendar-proxy-read' :
$type[$k] = 'Proxy-Read';
break;
case '{http://calendarserver.org/ns/}calendar-proxy-write' :
$type[$k] = 'Proxy-Write';
break;
}
}
$type = implode(', ', $type);
}
// If no resourcetype was found, we attempt to use
// the contenttype property
if (!$type && isset($file[200]['{DAV:}getcontenttype'])) {
$type = $file[200]['{DAV:}getcontenttype'];
}
if (!$type) $type = 'Unknown';
$size = isset($file[200]['{DAV:}getcontentlength'])?(int)$file[200]['{DAV:}getcontentlength']:'';
$lastmodified = isset($file[200]['{DAV:}getlastmodified'])?$file[200]['{DAV:}getlastmodified']->getTime()->format(DateTime::ATOM):'';
$fullPath = Sabre_DAV_URLUtil::encodePath('/' . trim($this->server->getBaseUri() . ($path?$path . '/':'') . $name,'/'));
$displayName = isset($file[200]['{DAV:}displayname'])?$file[200]['{DAV:}displayname']:$name;
$displayName = $this->escapeHTML($displayName);
$type = $this->escapeHTML($type);
$icon = '';
if ($this->enableAssets) {
$node = $parent->getChild($name);
foreach(array_reverse($this->iconMap) as $class=>$iconName) {
if ($node instanceof $class) {
$icon = '<a href="' . $fullPath . '"><img src="' . $this->getAssetUrl($iconName . $this->iconExtension) . '" alt="" width="24" /></a>';
break;
}
}
}
$html.= "<tr>
<td>$icon</td>
<td><a href=\"{$fullPath}\">{$displayName}</a></td>
<td>{$type}</td>
<td>{$size}</td>
<td>{$lastmodified}</td>
</tr>";
}
$html.= "<tr><td colspan=\"5\"><hr /></td></tr>";
$output = '';
if ($this->enablePost) {
$this->server->broadcastEvent('onHTMLActionsPanel',array($parent, &$output));
}
$html.=$output;
$html.= "</table>
<address>Generated by SabreDAV " . $version . " (c)2007-2012 <a href=\"http://code.google.com/p/sabredav/\">http://code.google.com/p/sabredav/</a></address>
</body>
</html>";
return $html;
}
/**
* This method is used to generate the 'actions panel' output for
* collections.
*
* This specifically generates the interfaces for creating new files, and
* creating new directories.
*
* @param Sabre_DAV_INode $node
* @param mixed $output
* @return void
*/
public function htmlActionsPanel(Sabre_DAV_INode $node, &$output) {
if (!$node instanceof Sabre_DAV_ICollection)
return;
// We also know fairly certain that if an object is a non-extended
// SimpleCollection, we won't need to show the panel either.
if (get_class($node)==='Sabre_DAV_SimpleCollection')
return;
$output.= '<tr><td colspan="2"><form method="post" action="">
<h3>Create new folder</h3>
<input type="hidden" name="sabreAction" value="mkcol" />
Name: <input type="text" name="name" /><br />
<input type="submit" value="create" />
</form>
<form method="post" action="" enctype="multipart/form-data">
<h3>Upload file</h3>
<input type="hidden" name="sabreAction" value="put" />
Name (optional): <input type="text" name="name" /><br />
File: <input type="file" name="file" /><br />
<input type="submit" value="upload" />
</form>
</td></tr>';
}
/**
* This method takes a path/name of an asset and turns it into url
* suiteable for http access.
*
* @param string $assetName
* @return string
*/
protected function getAssetUrl($assetName) {
return $this->server->getBaseUri() . '?sabreAction=asset&assetName=' . urlencode($assetName);
}
/**
* This method returns a local pathname to an asset.
*
* @param string $assetName
* @return string
*/
protected function getLocalAssetPath($assetName) {
// Making sure people aren't trying to escape from the base path.
$assetSplit = explode('/', $assetName);
if (in_array('..',$assetSplit)) {
throw new Sabre_DAV_Exception('Incorrect asset path');
}
$path = __DIR__ . '/assets/' . $assetName;
return $path;
}
/**
* This method reads an asset from disk and generates a full http response.
*
* @param string $assetName
* @return void
*/
protected function serveAsset($assetName) {
$assetPath = $this->getLocalAssetPath($assetName);
if (!file_exists($assetPath)) {
throw new Sabre_DAV_Exception_NotFound('Could not find an asset with this name');
}
// Rudimentary mime type detection
switch(strtolower(substr($assetPath,strpos($assetPath,'.')+1))) {
case 'ico' :
$mime = 'image/vnd.microsoft.icon';
break;
case 'png' :
$mime = 'image/png';
break;
default:
$mime = 'application/octet-stream';
break;
}
$this->server->httpResponse->setHeader('Content-Type', $mime);
$this->server->httpResponse->setHeader('Content-Length', filesize($assetPath));
$this->server->httpResponse->setHeader('Cache-Control', 'public, max-age=1209600');
$this->server->httpResponse->sendStatus(200);
$this->server->httpResponse->sendBody(fopen($assetPath,'r'));
}
}