/usr/share/php/Sabre/CalDAV/SharingPlugin.php is in php-sabre-dav 1.8.12-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 | <?php
namespace Sabre\CalDAV;
use Sabre\DAV;
/**
* This plugin implements support for caldav sharing.
*
* This spec is defined at:
* http://svn.calendarserver.org/repository/calendarserver/CalendarServer/trunk/doc/Extensions/caldav-sharing.txt
*
* See:
* Sabre\CalDAV\Backend\SharingSupport for all the documentation.
*
* Note: This feature is experimental, and may change in between different
* SabreDAV versions.
*
* @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
* @author Evert Pot (http://evertpot.com/)
* @license http://sabre.io/license/ Modified BSD License
*/
class SharingPlugin extends DAV\ServerPlugin {
/**
* These are the various status constants used by sharing-messages.
*/
const STATUS_ACCEPTED = 1;
const STATUS_DECLINED = 2;
const STATUS_DELETED = 3;
const STATUS_NORESPONSE = 4;
const STATUS_INVALID = 5;
/**
* Reference to SabreDAV server object.
*
* @var Sabre\DAV\Server
*/
protected $server;
/**
* This method should return a list of server-features.
*
* This is for example 'versioning' and is added to the DAV: header
* in an OPTIONS response.
*
* @return array
*/
public function getFeatures() {
return array('calendarserver-sharing');
}
/**
* Returns a plugin name.
*
* Using this name other plugins will be able to access other plugins
* using Sabre\DAV\Server::getPlugin
*
* @return string
*/
public function getPluginName() {
return 'caldav-sharing';
}
/**
* This initializes the plugin.
*
* This function is called by Sabre\DAV\Server, after
* addPlugin is called.
*
* This method should set up the required event subscriptions.
*
* @param DAV\Server $server
* @return void
*/
public function initialize(DAV\Server $server) {
$this->server = $server;
$server->resourceTypeMapping['Sabre\\CalDAV\\ISharedCalendar'] = '{' . Plugin::NS_CALENDARSERVER . '}shared';
array_push(
$this->server->protectedProperties,
'{' . Plugin::NS_CALENDARSERVER . '}invite',
'{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes',
'{' . Plugin::NS_CALENDARSERVER . '}shared-url'
);
$this->server->subscribeEvent('beforeGetProperties', array($this, 'beforeGetProperties'));
$this->server->subscribeEvent('afterGetProperties', array($this, 'afterGetProperties'));
$this->server->subscribeEvent('updateProperties', array($this, 'updateProperties'));
$this->server->subscribeEvent('unknownMethod', array($this,'unknownMethod'));
}
/**
* This event is triggered when properties are requested for a certain
* node.
*
* This allows us to inject any properties early.
*
* @param string $path
* @param DAV\INode $node
* @param array $requestedProperties
* @param array $returnedProperties
* @return void
*/
public function beforeGetProperties($path, DAV\INode $node, &$requestedProperties, &$returnedProperties) {
if ($node instanceof IShareableCalendar) {
if (($index = array_search('{' . Plugin::NS_CALENDARSERVER . '}invite', $requestedProperties))!==false) {
unset($requestedProperties[$index]);
$returnedProperties[200]['{' . Plugin::NS_CALENDARSERVER . '}invite'] =
new Property\Invite(
$node->getShares()
);
}
}
if ($node instanceof ISharedCalendar) {
if (($index = array_search('{' . Plugin::NS_CALENDARSERVER . '}shared-url', $requestedProperties))!==false) {
unset($requestedProperties[$index]);
$returnedProperties[200]['{' . Plugin::NS_CALENDARSERVER . '}shared-url'] =
new DAV\Property\Href(
$node->getSharedUrl()
);
}
// The 'invite' property is slightly different for the 'shared'
// instance of the calendar, as it also contains the owner
// information.
if (($index = array_search('{' . Plugin::NS_CALENDARSERVER . '}invite', $requestedProperties))!==false) {
unset($requestedProperties[$index]);
// Fetching owner information
$props = $this->server->getPropertiesForPath($node->getOwner(), array(
'{http://sabredav.org/ns}email-address',
'{DAV:}displayname',
), 1);
$ownerInfo = array(
'href' => $node->getOwner(),
);
if (isset($props[0][200])) {
// We're mapping the internal webdav properties to the
// elements caldav-sharing expects.
if (isset($props[0][200]['{http://sabredav.org/ns}email-address'])) {
$ownerInfo['href'] = 'mailto:' . $props[0][200]['{http://sabredav.org/ns}email-address'];
}
if (isset($props[0][200]['{DAV:}displayname'])) {
$ownerInfo['commonName'] = $props[0][200]['{DAV:}displayname'];
}
}
$returnedProperties[200]['{' . Plugin::NS_CALENDARSERVER . '}invite'] =
new Property\Invite(
$node->getShares(),
$ownerInfo
);
}
}
}
/**
* This method is triggered *after* all properties have been retrieved.
* This allows us to inject the correct resourcetype for calendars that
* have been shared.
*
* @param string $path
* @param array $properties
* @param DAV\INode $node
* @return void
*/
public function afterGetProperties($path, &$properties, DAV\INode $node) {
if ($node instanceof IShareableCalendar) {
if (isset($properties[200]['{DAV:}resourcetype'])) {
if (count($node->getShares())>0) {
$properties[200]['{DAV:}resourcetype']->add(
'{' . Plugin::NS_CALENDARSERVER . '}shared-owner'
);
}
}
$propName = '{' . Plugin::NS_CALENDARSERVER . '}allowed-sharing-modes';
if (array_key_exists($propName, $properties[404])) {
unset($properties[404][$propName]);
$properties[200][$propName] = new Property\AllowedSharingModes(true,false);
}
}
}
/**
* This method is trigged when a user attempts to update a node's
* properties.
*
* A previous draft of the sharing spec stated that it was possible to use
* PROPPATCH to remove 'shared-owner' from the resourcetype, thus unsharing
* the calendar.
*
* Even though this is no longer in the current spec, we keep this around
* because OS X 10.7 may still make use of this feature.
*
* @param array $mutations
* @param array $result
* @param DAV\INode $node
* @return void
*/
public function updateProperties(array &$mutations, array &$result, DAV\INode $node) {
if (!$node instanceof IShareableCalendar)
return;
if (!isset($mutations['{DAV:}resourcetype'])) {
return;
}
// Only doing something if shared-owner is indeed not in the list.
if($mutations['{DAV:}resourcetype']->is('{' . Plugin::NS_CALENDARSERVER . '}shared-owner')) return;
$shares = $node->getShares();
$remove = array();
foreach($shares as $share) {
$remove[] = $share['href'];
}
$node->updateShares(array(), $remove);
// We're marking this update as 200 OK
$result[200]['{DAV:}resourcetype'] = null;
// Removing it from the mutations list
unset($mutations['{DAV:}resourcetype']);
}
/**
* This event is triggered when the server didn't know how to handle a
* certain request.
*
* We intercept this to handle POST requests on calendars.
*
* @param string $method
* @param string $uri
* @return null|bool
*/
public function unknownMethod($method, $uri) {
if ($method!=='POST') {
return;
}
// Only handling xml
$contentType = $this->server->httpRequest->getHeader('Content-Type');
if (strpos($contentType,'application/xml')===false && strpos($contentType,'text/xml')===false)
return;
// Making sure the node exists
try {
$node = $this->server->tree->getNodeForPath($uri);
} catch (DAV\Exception\NotFound $e) {
return;
}
$requestBody = $this->server->httpRequest->getBody(true);
// If this request handler could not deal with this POST request, it
// will return 'null' and other plugins get a chance to handle the
// request.
//
// However, we already requested the full body. This is a problem,
// because a body can only be read once. This is why we preemptively
// re-populated the request body with the existing data.
$this->server->httpRequest->setBody($requestBody);
$dom = DAV\XMLUtil::loadDOMDocument($requestBody);
$documentType = DAV\XMLUtil::toClarkNotation($dom->firstChild);
switch($documentType) {
// Dealing with the 'share' document, which modified invitees on a
// calendar.
case '{' . Plugin::NS_CALENDARSERVER . '}share' :
// We can only deal with IShareableCalendar objects
if (!$node instanceof IShareableCalendar) {
return;
}
// Getting ACL info
$acl = $this->server->getPlugin('acl');
// If there's no ACL support, we allow everything
if ($acl) {
$acl->checkPrivileges($uri, '{DAV:}write');
}
$mutations = $this->parseShareRequest($dom);
$node->updateShares($mutations[0], $mutations[1]);
$this->server->httpResponse->sendStatus(200);
// Adding this because sending a response body may cause issues,
// and I wanted some type of indicator the response was handled.
$this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
// Breaking the event chain
return false;
// The invite-reply document is sent when the user replies to an
// invitation of a calendar share.
case '{'. Plugin::NS_CALENDARSERVER.'}invite-reply' :
// This only works on the calendar-home-root node.
if (!$node instanceof UserCalendars) {
return;
}
// Getting ACL info
$acl = $this->server->getPlugin('acl');
// If there's no ACL support, we allow everything
if ($acl) {
$acl->checkPrivileges($uri, '{DAV:}write');
}
$message = $this->parseInviteReplyRequest($dom);
$url = $node->shareReply(
$message['href'],
$message['status'],
$message['calendarUri'],
$message['inReplyTo'],
$message['summary']
);
$this->server->httpResponse->sendStatus(200);
// Adding this because sending a response body may cause issues,
// and I wanted some type of indicator the response was handled.
$this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
if ($url) {
$dom = new \DOMDocument('1.0', 'UTF-8');
$dom->formatOutput = true;
$root = $dom->createElement('cs:shared-as');
foreach($this->server->xmlNamespaces as $namespace => $prefix) {
$root->setAttribute('xmlns:' . $prefix, $namespace);
}
$dom->appendChild($root);
$href = new DAV\Property\Href($url);
$href->serialize($this->server, $root);
$this->server->httpResponse->setHeader('Content-Type','application/xml');
$this->server->httpResponse->sendBody($dom->saveXML());
}
// Breaking the event chain
return false;
case '{' . Plugin::NS_CALENDARSERVER . '}publish-calendar' :
// We can only deal with IShareableCalendar objects
if (!$node instanceof IShareableCalendar) {
return;
}
// Getting ACL info
$acl = $this->server->getPlugin('acl');
// If there's no ACL support, we allow everything
if ($acl) {
$acl->checkPrivileges($uri, '{DAV:}write');
}
$node->setPublishStatus(true);
// iCloud sends back the 202, so we will too.
$this->server->httpResponse->sendStatus(202);
// Adding this because sending a response body may cause issues,
// and I wanted some type of indicator the response was handled.
$this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
// Breaking the event chain
return false;
case '{' . Plugin::NS_CALENDARSERVER . '}unpublish-calendar' :
// We can only deal with IShareableCalendar objects
if (!$node instanceof IShareableCalendar) {
return;
}
// Getting ACL info
$acl = $this->server->getPlugin('acl');
// If there's no ACL support, we allow everything
if ($acl) {
$acl->checkPrivileges($uri, '{DAV:}write');
}
$node->setPublishStatus(false);
$this->server->httpResponse->sendStatus(200);
// Adding this because sending a response body may cause issues,
// and I wanted some type of indicator the response was handled.
$this->server->httpResponse->setHeader('X-Sabre-Status', 'everything-went-well');
// Breaking the event chain
return false;
}
}
/**
* Parses the 'share' POST request.
*
* This method returns an array, containing two arrays.
* The first array is a list of new sharees. Every element is a struct
* containing a:
* * href element. (usually a mailto: address)
* * commonName element (often a first and lastname, but can also be
* false)
* * readOnly (true or false)
* * summary (A description of the share, can also be false)
*
* The second array is a list of sharees that are to be removed. This is
* just a simple array with 'hrefs'.
*
* @param \DOMDocument $dom
* @return array
*/
protected function parseShareRequest(\DOMDocument $dom) {
$xpath = new \DOMXPath($dom);
$xpath->registerNamespace('cs', Plugin::NS_CALENDARSERVER);
$xpath->registerNamespace('d', 'urn:DAV');
$set = array();
$elems = $xpath->query('cs:set');
for($i=0; $i < $elems->length; $i++) {
$xset = $elems->item($i);
$set[] = array(
'href' => $xpath->evaluate('string(d:href)', $xset),
'commonName' => $xpath->evaluate('string(cs:common-name)', $xset),
'summary' => $xpath->evaluate('string(cs:summary)', $xset),
'readOnly' => $xpath->evaluate('boolean(cs:read)', $xset)!==false
);
}
$remove = array();
$elems = $xpath->query('cs:remove');
for($i=0; $i < $elems->length; $i++) {
$xremove = $elems->item($i);
$remove[] = $xpath->evaluate('string(d:href)', $xremove);
}
return array($set, $remove);
}
/**
* Parses the 'invite-reply' POST request.
*
* This method returns an array, containing the following properties:
* * href - The sharee who is replying
* * status - One of the self::STATUS_* constants
* * calendarUri - The url of the shared calendar
* * inReplyTo - The unique id of the share invitation.
* * summary - Optional description of the reply.
*
* @param \DOMDocument $dom
* @return array
*/
protected function parseInviteReplyRequest(\DOMDocument $dom) {
$xpath = new \DOMXPath($dom);
$xpath->registerNamespace('cs', Plugin::NS_CALENDARSERVER);
$xpath->registerNamespace('d', 'urn:DAV');
$hostHref = $xpath->evaluate('string(cs:hosturl/d:href)');
if (!$hostHref) {
throw new DAV\Exception\BadRequest('The {' . Plugin::NS_CALENDARSERVER . '}hosturl/{DAV:}href element is required');
}
return array(
'href' => $xpath->evaluate('string(d:href)'),
'calendarUri' => $this->server->calculateUri($hostHref),
'inReplyTo' => $xpath->evaluate('string(cs:in-reply-to)'),
'summary' => $xpath->evaluate('string(cs:summary)'),
'status' => $xpath->evaluate('boolean(cs:invite-accepted)')?self::STATUS_ACCEPTED:self::STATUS_DECLINED
);
}
}
|