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Differential D3908 Diff 11126 plugins/libkolab/lib/kolab_dav_client.php

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plugins/libkolab/lib/kolab_dav_client.php

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<?php
/**
* A *DAV client.
*
* @author Aleksander Machniak <machniak@apheleia-it.ch>
*
* Copyright (C) 2022, Apheleia IT AG <contact@apheleia-it.ch>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
class kolab_dav_client
{
public $url;
protected $user;
protected $password;
protected $rc;
protected $responseHeaders = [];
/**
* Object constructor
*/
public function __construct($url)
{
$this->rc = rcube::get_instance();
$parsedUrl = parse_url($url);
if (!empty($parsedUrl['user']) && !empty($parsedUrl['pass'])) {
$this->user = rawurldecode($parsedUrl['user']);
$this->password = rawurldecode($parsedUrl['pass']);
$url = str_replace(rawurlencode($this->user) . ':' . rawurlencode($this->password) . '@', '', $url);
}
else {
$this->user = $this->rc->user->get_username();
$this->password = $this->rc->decrypt($_SESSION['password']);
}
$this->url = $url;
}
/**
* Execute HTTP request to a DAV server
*/
protected function request($path, $method, $body = '', $headers = [])
{
$rcube = rcube::get_instance();
$debug = (array) $rcube->config->get('dav_debug');
$request_config = [
'store_body' => true,
'follow_redirects' => true,
];
$this->responseHeaders = [];
if ($path && ($rootPath = parse_url($this->url, PHP_URL_PATH)) && strpos($path, $rootPath) === 0) {
$path = substr($path, strlen($rootPath));
}
try {
$request = $this->initRequest($this->url . $path, $method, $request_config);
$request->setAuth($this->user, $this->password);
if ($body) {
$request->setBody($body);
$request->setHeader(['Content-Type' => 'application/xml; charset=utf-8']);
}
if (!empty($headers)) {
$request->setHeader($headers);
}
if ($debug) {
rcube::write_log('dav', "C: {$method}: " . (string) $request->getUrl()
. "\n" . $this->debugBody($body, $request->getHeaders()));
}
$response = $request->send();
$body = $response->getBody();
$code = $response->getStatus();
if ($debug) {
rcube::write_log('dav', "S: [{$code}]\n" . $this->debugBody($body, $response->getHeader()));
}
if ($code >= 300) {
throw new Exception("DAV Error ($code):\n{$body}");
}
$this->responseHeaders = $response->getHeader();
return $this->parseXML($body);
}
catch (Exception $e) {
rcube::raise_error($e, true, false);
return false;
}
}
/**
* Discover DAV folders of specified type on the server
*/
public function discover($component = 'VEVENT')
{
$roots = [
'VEVENT' => 'calendars',
'VTODO' => 'calendars',
'VCARD' => 'addressbooks',
];
$path = parse_url($this->url, PHP_URL_PATH);
$body = '<?xml version="1.0" encoding="utf-8"?>'
. '<d:propfind xmlns:d="DAV:">'
. '<d:prop>'
. '<d:current-user-principal />'
. '</d:prop>'
. '</d:propfind>';
// Note: Cyrus CardDAV service requires Depth:1 (CalDAV works without it)
$response = $this->request('/' . $roots[$component], 'PROPFIND', $body, ['Depth' => 1, 'Prefer' => 'return-minimal']);
$elements = $response->getElementsByTagName('response');
foreach ($elements as $element) {
foreach ($element->getElementsByTagName('prop') as $prop) {
$principal_href = $prop->nodeValue;
break;
}
}
if ($path && strpos($principal_href, $path) === 0) {
$principal_href = substr($principal_href, strlen($path));
}
$homes = [
'VEVENT' => 'calendar-home-set',
'VTODO' => 'calendar-home-set',
'VCARD' => 'addressbook-home-set',
];
$ns = [
'VEVENT' => 'caldav',
'VTODO' => 'caldav',
'VCARD' => 'carddav',
];
$body = '<?xml version="1.0" encoding="utf-8"?>'
. '<d:propfind xmlns:d="DAV:" xmlns:c="urn:ietf:params:xml:ns:' . $ns[$component] . '">'
. '<d:prop>'
. '<c:' . $homes[$component] . ' />'
. '</d:prop>'
. '</d:propfind>';
$response = $this->request($principal_href, 'PROPFIND', $body);
$elements = $response->getElementsByTagName('response');
foreach ($elements as $element) {
foreach ($element->getElementsByTagName('prop') as $prop) {
$root_href = $prop->nodeValue;
break;
}
}
if (!empty($root_href)) {
if ($path && strpos($root_href, $path) === 0) {
$root_href = substr($root_href, strlen($path));
}
}
else {
// Kolab iRony's calendar root
$root_href = '/' . $roots[$component] . '/' . rawurlencode($this->user);
}
if ($component == 'VCARD') {
$add_ns = '';
$add_props = '';
}
else {
$add_ns = ' xmlns:c="urn:ietf:params:xml:ns:caldav" xmlns:a="http://apple.com/ns/ical/"';
$add_props = '<c:supported-calendar-component-set /><a:calendar-color />';
}
$body = '<?xml version="1.0" encoding="utf-8"?>'
. '<d:propfind xmlns:d="DAV:" xmlns:cs="http://calendarserver.org/ns/"' . $add_ns . '>'
. '<d:prop>'
. '<d:resourcetype />'
. '<d:displayname />'
// . '<d:sync-token />'
. '<cs:getctag />'
. $add_props
. '</d:prop>'
. '</d:propfind>';
// Note: Cyrus CardDAV service requires Depth:1 (CalDAV works without it)
$response = $this->request($root_href, 'PROPFIND', $body, ['Depth' => 1, 'Prefer' => 'return-minimal']);
if (empty($response)) {
return false;
}
$folders = [];
foreach ($response->getElementsByTagName('response') as $element) {
$folder = $this->getFolderPropertiesFromResponse($element);
// Note: Addressbooks don't have 'type' specified
if (($component == 'VCARD' && in_array('addressbook', $folder['resource_type']))
|| $folder['type'] === $component
) {
$folders[] = $folder;
}
}
return $folders;
}
/**
* Create a DAV object in a folder
*/
public function create($location, $content, $component = 'VEVENT')
{
$ctype = [
'VEVENT' => 'text/calendar',
'VTODO' => 'text/calendar',
'VCARD' => 'text/vcard',
];
$headers = ['Content-Type' => $ctype[$component] . '; charset=utf-8'];
$response = $this->request($location, 'PUT', $content, $headers);
if ($response !== false) {
$etag = $this->responseHeaders['etag'];
if (preg_match('|^".*"$|', $etag)) {
$etag = substr($etag, 1, -1);
}
return $etag;
}
return false;
}
/**
* Update a DAV object in a folder
*/
public function update($location, $content, $component = 'VEVENT')
{
return $this->create($location, $content, $component);
}
/**
* Delete a DAV object from a folder
*/
public function delete($location)
{
$response = $this->request($location, 'DELETE', '', ['Depth' => 1, 'Prefer' => 'return-minimal']);
return $response !== false;
}
/**
* Fetch DAV objects metadata (ETag, href) a folder
*/
public function getIndex($location, $component = 'VEVENT')
{
$queries = [
'VEVENT' => 'calendar-query',
'VTODO' => 'calendar-query',
'VCARD' => 'addressbook-query',
];
$ns = [
'VEVENT' => 'caldav',
'VTODO' => 'caldav',
'VCARD' => 'carddav',
];
$filter = '';
if ($component != 'VCARD') {
$filter = '<c:comp-filter name="VCALENDAR">'
. '<c:comp-filter name="' . $component . '" />'
. '</c:comp-filter>';
}
$body = '<?xml version="1.0" encoding="utf-8"?>'
.' <c:' . $queries[$component] . ' xmlns:d="DAV:" xmlns:c="urn:ietf:params:xml:ns:' . $ns[$component]. '">'
. '<d:prop>'
. '<d:getetag />'
. '</d:prop>'
. ($filter ? "<c:filter>$filter</c:filter>" : '')
. '</c:' . $queries[$component] . '>';
$response = $this->request($location, 'REPORT', $body, ['Depth' => 1, 'Prefer' => 'return-minimal']);
if (empty($response)) {
return false;
}
$objects = [];
foreach ($response->getElementsByTagName('response') as $element) {
$objects[] = $this->getObjectPropertiesFromResponse($element);
}
return $objects;
}
/**
* Fetch DAV objects data from a folder
*/
public function getData($location, $component = 'VEVENT', $hrefs = [])
{
if (empty($hrefs)) {
return [];
}
$body = '';
foreach ($hrefs as $href) {
$body .= '<d:href>' . $href . '</d:href>';
}
$queries = [
'VEVENT' => 'calendar-multiget',
'VTODO' => 'calendar-multiget',
'VCARD' => 'addressbook-multiget',
];
$ns = [
'VEVENT' => 'caldav',
'VTODO' => 'caldav',
'VCARD' => 'carddav',
];
$types = [
'VEVENT' => 'calendar-data',
'VTODO' => 'calendar-data',
'VCARD' => 'address-data',
];
$body = '<?xml version="1.0" encoding="utf-8"?>'
.' <c:' . $queries[$component] . ' xmlns:d="DAV:" xmlns:c="urn:ietf:params:xml:ns:' . $ns[$component] . '">'
. '<d:prop>'
. '<d:getetag />'
. '<c:' . $types[$component]. ' />'
. '</d:prop>'
. $body
. '</c:' . $queries[$component] . '>';
$response = $this->request($location, 'REPORT', $body, ['Depth' => 1, 'Prefer' => 'return-minimal']);
if (empty($response)) {
return false;
}
$objects = [];
foreach ($response->getElementsByTagName('response') as $element) {
$objects[] = $this->getObjectPropertiesFromResponse($element);
}
return $objects;
}
/**
* Parse XML content
*/
protected function parseXML($xml)
{
$doc = new DOMDocument('1.0', 'UTF-8');
if (stripos($xml, '<?xml') === 0) {
if (!$doc->loadXML($xml)) {
throw new Exception("Failed to parse XML");
}
$doc->formatOutput = true;
}
return $doc;
}
/**
* Parse request/response body for debug purposes
*/
protected function debugBody($body, $headers)
{
$head = '';
foreach ($headers as $header_name => $header_value) {
$head .= "{$header_name}: {$header_value}\n";
}
if (stripos($body, '<?xml') === 0) {
$doc = new DOMDocument('1.0', 'UTF-8');
$doc->formatOutput = true;
$doc->preserveWhiteSpace = false;
if (!$doc->loadXML($body)) {
throw new Exception("Failed to parse XML");
}
$body = $doc->saveXML();
}
return $head . "\n" . rtrim($body);
}
/**
* Extract folder properties from a server 'response' element
*/
protected function getFolderPropertiesFromResponse(DOMNode $element)
{
if ($href = $element->getElementsByTagName('href')->item(0)) {
$href = $href->nodeValue;
/*
$path = parse_url($this->url, PHP_URL_PATH);
if ($path && strpos($href, $path) === 0) {
$href = substr($href, strlen($path));
}
*/
}
if ($color = $element->getElementsByTagName('calendar-color')->item(0)) {
if (preg_match('/^#[0-9A-F]{8}$/', $color->nodeValue)) {
$color = substr($color->nodeValue, 1, -2);
} else {
$color = null;
}
}
if ($name = $element->getElementsByTagName('displayname')->item(0)) {
$name = $name->nodeValue;
}
if ($ctag = $element->getElementsByTagName('getctag')->item(0)) {
$ctag = $ctag->nodeValue;
}
$component = null;
if ($set_element = $element->getElementsByTagName('supported-calendar-component-set')->item(0)) {
if ($comp_element = $set_element->getElementsByTagName('comp')->item(0)) {
$component = $comp_element->attributes->getNamedItem('name')->nodeValue;
}
}
$types = [];
if ($type_element = $element->getElementsByTagName('resourcetype')->item(0)) {
foreach ($type_element->childNodes as $node) {
$_type = explode(':', $node->nodeName);
$types[] = count($_type) > 1 ? $_type[1] : $_type[0];
}
}
return [
'href' => $href,
'name' => $name,
'ctag' => $ctag,
'color' => $color,
'type' => $component,
'resource_type' => $types,
];
}
/**
* Extract object properties from a server 'response' element
*/
protected function getObjectPropertiesFromResponse(DOMNode $element)
{
$uid = null;
if ($href = $element->getElementsByTagName('href')->item(0)) {
$href = $href->nodeValue;
/*
$path = parse_url($this->url, PHP_URL_PATH);
if ($path && strpos($href, $path) === 0) {
$href = substr($href, strlen($path));
}
*/
// Extract UID from the URL
$href_parts = explode('/', $href);
$uid = preg_replace('/\.[a-z]+$/', '', $href_parts[count($href_parts)-1]);
}
if ($data = $element->getElementsByTagName('calendar-data')->item(0)) {
$data = $data->nodeValue;
}
else if ($data = $element->getElementsByTagName('address-data')->item(0)) {
$data = $data->nodeValue;
}
if ($etag = $element->getElementsByTagName('getetag')->item(0)) {
$etag = $etag->nodeValue;
if (preg_match('|^".*"$|', $etag)) {
$etag = substr($etag, 1, -1);
}
}
return [
'href' => $href,
'data' => $data,
'etag' => $etag,
'uid' => $uid,
];
}
/**
* Initialize HTTP request object
*/
protected function initRequest($url = '', $method = 'GET', $config = array())
{
$rcube = rcube::get_instance();
$http_config = (array) $rcube->config->get('kolab_http_request');
// deprecated configuration options
if (empty($http_config)) {
foreach (array('ssl_verify_peer', 'ssl_verify_host') as $option) {
$value = $rcube->config->get('kolab_' . $option, true);
if (is_bool($value)) {
$http_config[$option] = $value;
}
}
}
if (!empty($config)) {
$http_config = array_merge($http_config, $config);
}
// load HTTP_Request2 (support both composer-installed and system-installed package)
if (!class_exists('HTTP_Request2')) {
require_once 'HTTP/Request2.php';
}
try {
$request = new HTTP_Request2();
$request->setConfig($http_config);
// proxy User-Agent string
$request->setHeader('user-agent', $_SERVER['HTTP_USER_AGENT']);
// cleanup
$request->setBody('');
$request->setUrl($url);
$request->setMethod($method);
return $request;
}
catch (Exception $e) {
rcube::raise_error($e, true, true);
}
}
}