Initial commit of the Faster IT roundcube_calendar plugin distribution

This includes:
 * Kolab plugins 3.2.9 (calendar and libcalendaring)
 * CalDAV driver 3.2.8
 * .htaccess files for at least some security
 * SabreDAV updated to 1.8.12 (Jan 2015 release)
 * Support for CURLOPT_SSL_* settings to allow self-signed certificates
 * Small fixes & improved documentation

20 files changed, 695 insertions, 0 deletions

diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/BadRequest.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/BadRequest.php
new file mode 100644
index 0000000..aeb6350
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/BadRequest.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * BadRequest
+ *
+ * The BadRequest is thrown when the user submitted an invalid HTTP request
+ * BadRequest
+ *
+ * @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 BadRequest extends \OldSabre\DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 400;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Conflict.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Conflict.php
new file mode 100644
index 0000000..97ef2cd
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Conflict.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * Conflict
+ *
+ * A 409 Conflict is thrown when a user tried to make a directory over an existing
+ * file or in a parent directory that doesn't exist.
+ *
+ * @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 Conflict extends \OldSabre\DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 409;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ConflictingLock.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ConflictingLock.php
new file mode 100644
index 0000000..33839d3
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ConflictingLock.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * ConflictingLock
+ *
+ * Similar to  the Locked exception, this exception thrown when a LOCK request
+ * was made, on a resource which was already locked
+ *
+ * @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 ConflictingLock extends Locked {
+
+    /**
+     * This method allows the exception to include additional information into the WebDAV error response
+     *
+     * @param DAV\Server $server
+     * @param \DOMElement $errorNode
+     * @return void
+     */
+    public function serialize(DAV\Server $server, \DOMElement $errorNode) {
+
+        if ($this->lock) {
+            $error = $errorNode->ownerDocument->createElementNS('DAV:','d:no-conflicting-lock');
+            $errorNode->appendChild($error);
+            if (!is_object($this->lock)) var_dump($this->lock);
+            $error->appendChild($errorNode->ownerDocument->createElementNS('DAV:','d:href',$this->lock->uri));
+        }
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/FileNotFound.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/FileNotFound.php
new file mode 100644
index 0000000..f35f9b3
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/FileNotFound.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * FileNotFound
+ *
+ * Deprecated: Warning, this class is deprecated and will be removed in a
+ * future version of SabreDAV. Please use OldSabre\DAV\Exception\NotFound instead.
+ *
+ * @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
+ * @author Evert Pot (http://evertpot.com/)
+ * @deprecated Use OldSabre\DAV\Exception\NotFound instead
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class FileNotFound extends NotFound {
+
+}
+
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Forbidden.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Forbidden.php
new file mode 100644
index 0000000..003d86b
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Forbidden.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * Forbidden
+ *
+ * This exception is thrown whenever a user tries to do an operation he's not allowed to
+ *
+ * @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 Forbidden extends \OldSabre\DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 403;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/InsufficientStorage.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/InsufficientStorage.php
new file mode 100644
index 0000000..081a3e4
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/InsufficientStorage.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * InsufficientStorage
+ *
+ * This Exception can be thrown, when for example a harddisk is full or a quota is exceeded
+ *
+ * @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 InsufficientStorage extends \OldSabre\DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 507;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/InvalidResourceType.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/InvalidResourceType.php
new file mode 100644
index 0000000..9526b8d
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/InvalidResourceType.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * InvalidResourceType
+ *
+ * This exception is thrown when the user tried to create a new collection, with
+ * a special resourcetype value that was not recognized by the server.
+ *
+ * See RFC5689 section 3.3
+ *
+ * @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 InvalidResourceType extends Forbidden {
+
+    /**
+     * This method allows the exception to include additional information into the WebDAV error response
+     *
+     * @param DAV\Server $server
+     * @param \DOMElement $errorNode
+     * @return void
+     */
+    public function serialize(\OldSabre\DAV\Server $server,\DOMElement $errorNode) {
+
+        $error = $errorNode->ownerDocument->createElementNS('DAV:','d:valid-resourcetype');
+        $errorNode->appendChild($error);
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/LengthRequired.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/LengthRequired.php
new file mode 100644
index 0000000..39cd639
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/LengthRequired.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * LengthRequired
+ *
+ * This exception is thrown when a request was made that required a
+ * Content-Length header, but did not contain one.
+ *
+ * @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 LengthRequired extends DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 411;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/LockTokenMatchesRequestUri.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/LockTokenMatchesRequestUri.php
new file mode 100644
index 0000000..08d94b5
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/LockTokenMatchesRequestUri.php
@@ -0,0 +1,41 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * LockTokenMatchesRequestUri
+ *
+ * This exception is thrown by UNLOCK if a supplied lock-token is invalid
+ *
+ * @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 LockTokenMatchesRequestUri extends Conflict {
+
+    /**
+     * Creates the exception
+     */
+    public function __construct() {
+
+        $this->message = 'The locktoken supplied does not match any locks on this entity';
+
+    }
+
+    /**
+     * This method allows the exception to include additional information into the WebDAV error response
+     *
+     * @param DAV\Server $server
+     * @param \DOMElement $errorNode
+     * @return void
+     */
+    public function serialize(DAV\Server $server,\DOMElement $errorNode) {
+
+        $error = $errorNode->ownerDocument->createElementNS('DAV:','d:lock-token-matches-request-uri');
+        $errorNode->appendChild($error);
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Locked.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Locked.php
new file mode 100644
index 0000000..4d38357
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/Locked.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * Locked
+ *
+ * The 423 is thrown when a client tried to access a resource that was locked, without supplying a valid lock token
+ *
+ * @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 Locked extends DAV\Exception {
+
+    /**
+     * Lock information
+     *
+     * @var OldSabre\DAV\Locks\LockInfo
+     */
+    protected $lock;
+
+    /**
+     * Creates the exception
+     *
+     * A LockInfo object should be passed if the user should be informed
+     * which lock actually has the file locked.
+     *
+     * @param DAV\Locks\LockInfo $lock
+     */
+    public function __construct(DAV\Locks\LockInfo $lock = null) {
+
+        $this->lock = $lock;
+
+    }
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 423;
+
+    }
+
+    /**
+     * This method allows the exception to include additional information into the WebDAV error response
+     *
+     * @param DAV\Server $server
+     * @param \DOMElement $errorNode
+     * @return void
+     */
+    public function serialize(DAV\Server $server,\DOMElement $errorNode) {
+
+        if ($this->lock) {
+            $error = $errorNode->ownerDocument->createElementNS('DAV:','d:lock-token-submitted');
+            $errorNode->appendChild($error);
+
+            $href = $errorNode->ownerDocument->createElementNS('DAV:','d:href');
+            $href->appendChild($errorNode->ownerDocument->createTextNode($this->lock->uri));
+            $error->appendChild(
+                $href
+            );
+        }
+
+    }
+
+}
+
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/MethodNotAllowed.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/MethodNotAllowed.php
new file mode 100644
index 0000000..adf91e2
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/MethodNotAllowed.php
@@ -0,0 +1,45 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * MethodNotAllowed
+ *
+ * The 405 is thrown when a client tried to create a directory on an already existing directory
+ *
+ * @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 MethodNotAllowed extends \OldSabre\DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 405;
+
+    }
+
+    /**
+     * This method allows the exception to return any extra HTTP response headers.
+     *
+     * The headers must be returned as an array.
+     *
+     * @param \OldSabre\DAV\Server $server
+     * @return array
+     */
+    public function getHTTPHeaders(\OldSabre\DAV\Server $server) {
+
+        $methods = $server->getAllowedMethods($server->getRequestUri());
+
+        return array(
+            'Allow' => strtoupper(implode(', ',$methods)),
+        );
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotAuthenticated.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotAuthenticated.php
new file mode 100644
index 0000000..2e98802
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotAuthenticated.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * NotAuthenticated
+ *
+ * This exception is thrown when the client did not provide valid
+ * authentication credentials.
+ *
+ * @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 NotAuthenticated extends DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 401;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotFound.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotFound.php
new file mode 100644
index 0000000..210f21f
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotFound.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * NotFound
+ *
+ * This Exception is thrown when a Node couldn't be found. It returns HTTP error code 404
+ *
+ * @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 NotFound extends \OldSabre\DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 404;
+
+    }
+
+}
+
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotImplemented.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotImplemented.php
new file mode 100644
index 0000000..f9624e8
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/NotImplemented.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * NotImplemented
+ *
+ * This exception is thrown when the client tried to call an unsupported HTTP method or other feature
+ *
+ * @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 NotImplemented extends \OldSabre\DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 501;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/PaymentRequired.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/PaymentRequired.php
new file mode 100644
index 0000000..1fd18be
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/PaymentRequired.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * Payment Required
+ *
+ * The PaymentRequired exception may be thrown in a case where a user must pay
+ * to access a certain resource or operation.
+ *
+ * @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 PaymentRequired extends DAV\Exception {
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 402;
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/PreconditionFailed.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/PreconditionFailed.php
new file mode 100644
index 0000000..625a7fc
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/PreconditionFailed.php
@@ -0,0 +1,71 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * PreconditionFailed
+ *
+ * This exception is normally thrown when a client submitted a conditional request,
+ * like for example an If, If-None-Match or If-Match header, which caused the HTTP
+ * request to not execute (the condition of the header failed)
+ *
+ * @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 PreconditionFailed extends DAV\Exception {
+
+    /**
+     * When this exception is thrown, the header-name might be set.
+     *
+     * This allows the exception-catching code to determine which HTTP header
+     * caused the exception.
+     *
+     * @var string
+     */
+    public $header = null;
+
+    /**
+     * Create the exception
+     *
+     * @param string $message
+     * @param string $header
+     */
+    public function __construct($message, $header=null) {
+
+        parent::__construct($message);
+        $this->header = $header;
+
+    }
+
+    /**
+     * Returns the HTTP statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 412;
+
+    }
+
+    /**
+     * This method allows the exception to include additional information into the WebDAV error response
+     *
+     * @param DAV\Server $server
+     * @param \DOMElement $errorNode
+     * @return void
+     */
+    public function serialize(DAV\Server $server,\DOMElement $errorNode) {
+
+        if ($this->header) {
+            $prop = $errorNode->ownerDocument->createElement('s:header');
+            $prop->nodeValue = $this->header;
+            $errorNode->appendChild($prop);
+        }
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ReportNotSupported.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ReportNotSupported.php
new file mode 100644
index 0000000..f1d42ba
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ReportNotSupported.php
@@ -0,0 +1,32 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * ReportNotSupported
+ *
+ * This exception is thrown when the client requested an unknown report through the REPORT method
+ *
+ * @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 ReportNotSupported extends Forbidden {
+
+    /**
+     * This method allows the exception to include additional information into the WebDAV error response
+     *
+     * @param DAV\Server $server
+     * @param \DOMElement $errorNode
+     * @return void
+     */
+    public function serialize(DAV\Server $server,\DOMElement $errorNode) {
+
+        $error = $errorNode->ownerDocument->createElementNS('DAV:','d:supported-report');
+        $errorNode->appendChild($error);
+
+    }
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/RequestedRangeNotSatisfiable.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/RequestedRangeNotSatisfiable.php
new file mode 100644
index 0000000..5528cde
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/RequestedRangeNotSatisfiable.php
@@ -0,0 +1,31 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * RequestedRangeNotSatisfiable
+ *
+ * This exception is normally thrown when the user
+ * request a range that is out of the entity bounds.
+ *
+ * @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 RequestedRangeNotSatisfiable extends DAV\Exception {
+
+    /**
+     * returns the http statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 416;
+
+    }
+
+}
+
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ServiceUnavailable.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ServiceUnavailable.php
new file mode 100644
index 0000000..94993f2
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/ServiceUnavailable.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+use OldSabre\DAV;
+
+/**
+ * ServiceUnavailable
+ *
+ * This exception is thrown in case the service
+ * is currently not available (e.g. down for maintenance).
+ *
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ * @copyright Copyright (C) 2007-2015 fruux GmbH (https://fruux.com/).
+ * @license http://sabre.io/license/ Modified BSD License
+ */
+class ServiceUnavailable extends DAV\Exception {
+
+	/**
+	 * Returns the HTTP statuscode for this exception
+	 *
+	 * @return int
+	 */
+	public function getHTTPCode() {
+
+		return 503;
+
+	}
+
+}
diff --git a/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/UnsupportedMediaType.php b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/UnsupportedMediaType.php
new file mode 100644
index 0000000..32ba6f1
--- /dev/null
+++ b/calendar/lib/SabreDAV/lib/OldSabre/DAV/Exception/UnsupportedMediaType.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace OldSabre\DAV\Exception;
+
+/**
+ * UnSupportedMediaType
+ *
+ * The 415 Unsupported Media Type status code is generally sent back when the client
+ * tried to call an HTTP method, with a body the server didn't understand
+ *
+ * @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 UnsupportedMediaType extends \OldSabre\DAV\Exception {
+
+    /**
+     * returns the http statuscode for this exception
+     *
+     * @return int
+     */
+    public function getHTTPCode() {
+
+        return 415;
+
+    }
+
+}