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
|
<?php
/**
* @copyright Copyright (c) 2019 Julius Härtl <jus@bitgrid.net>
*
* @author Julius Härtl <jus@bitgrid.net>
*
* @license GNU AGPL version 3 or any later version
*
* 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/>.
*
*/
namespace OCA\Richdocuments\Service;
use OCA\Federation\TrustedServers;
use OCA\Files_Sharing\External\Storage as SharingExternalStorage;
use OCA\Richdocuments\Db\Direct;
use OCA\Richdocuments\Db\Wopi;
use OCA\Richdocuments\TokenManager;
use OCP\AppFramework\Http\RedirectResponse;
use OCP\AppFramework\QueryException;
use OCP\Files\File;
use OCP\Files\InvalidPathException;
use OCP\Files\NotFoundException;
use OCP\Http\Client\IClientService;
use OCP\ICache;
use OCP\ICacheFactory;
use OCP\IConfig;
use OCP\ILogger;
use OCP\IRequest;
use OCP\Share\IShare;
class FederationService {
/** @var ICache */
private $cache;
/** @var IClientService */
private $clientService;
/** @var ILogger */
private $logger;
/** @var TrustedServers */
private $trustedServers;
/** @var IConfig */
private $config;
/** @var TokenManager */
private $tokenManager;
/** @var IRequest */
private $request;
public function __construct(ICacheFactory $cacheFactory, IClientService $clientService, ILogger $logger, TokenManager $tokenManager, IConfig $config, IRequest $request) {
$this->cache = $cacheFactory->createDistributed('richdocuments_remote/');
$this->clientService = $clientService;
$this->logger = $logger;
$this->tokenManager = $tokenManager;
$this->config = $config;
$this->request = $request;
try {
$this->trustedServers = \OC::$server->query( \OCA\Federation\TrustedServers::class);
} catch (QueryException $e) {}
}
/**
* @param $remote
* @return string
* @throws \Exception
*/
public function getRemoteCollaboraURL($remote) {
// If no protocol is provided we default to https
if (strpos($remote, 'http://') !== 0 && strpos($remote, 'https://') !== 0) {
$remote = 'https://' . $remote;
}
if (!$this->isTrustedRemote($remote)) {
throw new \Exception('Unable to determine collabora URL of remote server ' . $remote . ' - Remote is not a trusted server');
}
$remoteCollabora = $this->cache->get('richdocuments_remote/' . $remote);
if ($remoteCollabora !== null) {
return $remoteCollabora;
}
try {
$client = $this->clientService->newClient();
$response = $client->get($remote . '/ocs/v2.php/apps/richdocuments/api/v1/federation?format=json', ['timeout' => 5]);
$data = \json_decode($response->getBody(), true);
$remoteCollabora = $data['ocs']['data']['wopi_url'];
$this->cache->set('richdocuments_remote/' . $remote, $remoteCollabora, 3600);
return $remoteCollabora;
} catch (\Throwable $e) {
$this->logger->info('Unable to determine collabora URL of remote server ' . $remote, ['exception' => $e]);
$this->cache->set('richdocuments_remote/' . $remote, '', 300);
}
return '';
}
public function isTrustedRemote($domainWithPort) {
if (strpos($domainWithPort, 'http://') === 0 || strpos($domainWithPort, 'https://') === 0) {
$port = parse_url($domainWithPort, PHP_URL_PORT);
$domainWithPort = parse_url($domainWithPort, PHP_URL_HOST) . ($port ? ':' . $port : '');
}
if ($this->trustedServers !== null && $this->trustedServers->isTrustedServer($domainWithPort)) {
return true;
}
$domain = $this->getDomainWithoutPort($domainWithPort);
$trustedList = array_merge($this->config->getSystemValue('gs.trustedHosts', []), [$this->request->getServerHost()]);
if (!is_array($trustedList)) {
return false;
}
foreach ($trustedList as $trusted) {
if (!is_string($trusted)) {
break;
}
$regex = '/^' . implode('[-\.a-zA-Z0-9]*', array_map(function ($v) {
return preg_quote($v, '/');
}, explode('*', $trusted))) . '$/i';
if (preg_match($regex, $domain) || preg_match($regex, $domainWithPort)) {
return true;
}
}
return false;
}
/**
* Strips a potential port from a domain (in format domain:port)
* @param string $host
* @return string $host without appended port
*/
private function getDomainWithoutPort($host) {
$pos = strrpos($host, ':');
if ($pos !== false) {
$port = substr($host, $pos + 1);
if (is_numeric($port)) {
$host = substr($host, 0, $pos);
}
}
return $host;
}
/** @return Wopi|null */
public function getRemoteFileDetails(string $remote, string $remoteToken) {
$cacheKey = md5($remote . $remoteToken);
$remoteWopi = $this->cache->get($cacheKey);
if ($remoteWopi !== null) {
return Wopi::fromParams($remoteWopi);
}
if (!$this->isTrustedRemote($remote)) {
$this->logger->info('COOL-Federation-Source: Unable to determine collabora URL of remote server ' . $remote . ' for token ' . $remoteToken . ' - Remote is not a trusted server');
return null;
}
try {
$this->logger->debug('COOL-Federation-Source: Fetching remote file details from ' . $remote . ' for token ' . $remoteToken);
$client = $this->clientService->newClient();
$response = $client->post($remote . '/ocs/v2.php/apps/richdocuments/api/v1/federation?format=json', [
'timeout' => 5,
'body' => [
'token' => $remoteToken
]
]);
$responseBody = $response->getBody();
$data = \json_decode($responseBody, true, 512);
$this->logger->debug('COOL-Federation-Source: Received remote file details for ' . $remoteToken . ' from ' . $remote . ': ' . json_encode($data['ocs']['data']));
$this->cache->set($cacheKey, $data['ocs']['data']);
return Wopi::fromParams($data['ocs']['data']);
} catch (\Throwable $e) {
$this->logger->error('COOL-Federation-Source: Unable to fetch remote file details for ' . $remoteToken . ' from ' . $remote, ['exception' => $e]);
}
return null;
}
/**
* @param File $item
* @return string|null
* @throws NotFoundException
* @throws InvalidPathException
*/
public function getRemoteRedirectURL(File $item, Direct $direct = null, IShare $share = null) {
if (!$item->getStorage()->instanceOfStorage(SharingExternalStorage::class)) {
return null;
}
$remote = $item->getStorage()->getRemote();
$remoteCollabora = $this->getRemoteCollaboraURL($remote);
if ($remoteCollabora !== '') {
$shareToken = $share ? $share->getToken() : null;
$wopi = $this->tokenManager->newInitiatorToken($remote, $item, $shareToken, ($direct !== null), ($direct ? $direct->getUid() : null));
$initiatorServer = $wopi->getServerHost();
$initiatorToken = $wopi->getToken();
if ($direct) {
//$wopi->setRemoteServer($direct->getInitiatorHost());
//$wopi->setRemoteServerToken($direct->getInitiatorToken());
// FIXME: the direct token might have a different originator when a share link originating on a federated stoarge is opened
// editor uid is null since we don't fetch it from the initiator of direct so @{link remoteWopiToken()} fails
// Currently there is no mapping from the initiator user data to the source then
}
$url = rtrim($remote, '/') . '/index.php/apps/richdocuments/remote?shareToken=' . $item->getStorage()->getToken() .
'&remoteServer=' . $initiatorServer .
'&remoteServerToken=' . $initiatorToken;
if ($item->getInternalPath() !== '') {
$url .= '&filePath=' . $item->getInternalPath();
}
return $url;
}
throw new NotFoundException('Failed to connect to remote collabora instance for ' . $item->getId());
}
}
|