Merge pull request #8708 from nextcloud/add-recording-server

Add recording server

appinfo/routes/routesRecordingController.php

@@ -30,6 +30,10 @@ $requirements = [
 
 return [
 	'ocs' => [
+		/** @see \OCA\Talk\Controller\RecordingController::getWelcomeMessage() */
+		['name' => 'Recording#getWelcomeMessage', 'url' => '/api/{apiVersion}/recording/welcome/{serverId}', 'verb' => 'GET', 'requirements' => array_merge($requirements, [
+			'serverId' => '\d+',
+		])],
 		/** @see \OCA\Talk\Controller\RecordingController::start() */
 		['name' => 'Recording#start', 'url' => '/api/{apiVersion}/recording/{token}', 'verb' => 'POST', 'requirements' => $requirements],
 		/** @see \OCA\Talk\Controller\RecordingController::stop() */

docs/recording.md

@@ -20,6 +20,7 @@
         + `400 Bad Request` Message: `config`. Need to enable the config `recording`.
         + `400 Bad Request` Message: `recording`. Already have a recording in progress.
         + `400 Bad Request` Message: `call`. Call is not activated.
+        + `401 Unauthorized` When the participant is a guest.
         + `403 Forbidden` When the user is not a moderator/owner.
         + `412 Precondition Failed` When the lobby is active and the user is not a moderator.
 
@@ -34,6 +35,7 @@
         + `200 OK`
         + `400 Bad Request` Message: `config`. Need to enable the config `recording`.
         + `400 Bad Request` Message: `call`. Call is not activated.
+        + `401 Unauthorized` When the participant is a guest.
         + `403 Forbidden` When the user is not a moderator/owner.
         + `412 Precondition Failed` When the lobby is active and the user is not a moderator.
 
@@ -46,9 +48,9 @@
 * Header:
 
 | field                     | type   | Description                                                                                                                   |
-| ------------------------- | ------ | -------------------------------------------------------------------------------------------------------------------------- |
-| `TALK_SIPBRIDGE_RANDOM`   | string | Random string that needs to be concatenated with room token to generate the checksum using the `sip_bridge_shared_secret`. |
-| `TALK_SIPBRIDGE_CHECKSUM` | string | The checksum generated with `TALK_SIPBRIDGE_RANDOM`.                                                                       |
+| ------------------------- | ------ | ----------------------------------------------------------------------------------------------------------------------------- |
+| `TALK_RECORDING_RANDOM`   | string | Random string that needs to be concatenated with room token to generate the checksum using the `recording_servers['secret']`. |
+| `TALK_RECORDING_CHECKSUM` | string | The checksum generated with `TALK_RECORDING_RANDOM`.                                                                          |
 
 * Data:
 
@@ -68,7 +70,7 @@
         + `400 Bad Request` Error: `owner_participant`: Owner is not to be a participant of room
         + `400 Bad Request` Error: `owner_invalid`: Owner invalid
         + `400 Bad Request` Error: `owner_permission`: Owner have not permission to store record file
-        + `401 Unauthorized` When the validation as SIP bridge failed
+        + `401 Unauthorized` When the validation as recording server failed
         + `404 Not Found` Room not found
         + `429 Too Many Request` Brute force protection
 

docs/settings.md

@@ -64,6 +64,7 @@ Option legend:
 | `hosted-signaling-server-account`    | array                                                            | `{}`       | 🖌️    | Account information of the hosted signaling server                                                                                                                                |
 | `stun_servers`                       | array[]                                                          | `[]`       | 🖌💻️  | List of STUN servers, should be configured via the web interface or the OCC commands                                                                                              |
 | `turn_servers`                       | array[]                                                          | `[]`       | 🖌️💻  | List of TURN servers, should be configured via the web interface or the OCC commands                                                                                              |
+| `recording_servers`                  | array[]                                                          | `[]`       | 🖌️    | List of recording servers, should be configured via the web interface                                                                                                             |
 | `signaling_servers`                  | array[]                                                          | `[]`       | 🖌️💻  | List of signaling servers, should be configured via the web interface or the OCC commands                                                                                         |
 | `signaling_mode`                     | string<br>`internal` or `external` or `conversation_cluster`     | `internal` |        | `internal` when no HPB is configured, `external` when configured, `conversation_cluster` is an experimental flag that is deprecated                                               |
 | `sip_bridge_dialin_info`             | string                                                           |            | 🖌️    | Additional information added in the SIP dial-in invitation mail and sidebar                                                                                                       |

lib/Config.php

@@ -141,6 +141,28 @@ class Config {
 		return $this->config->getAppValue('spreed', 'signaling_dev', 'no') === 'yes';
 	}
 
+	public function getRecordingServers(): array {
+		$config = $this->config->getAppValue('spreed', 'recording_servers');
+		$recording = json_decode($config, true);
+
+		if (!is_array($recording) || !isset($recording['servers'])) {
+			return [];
+		}
+
+		return $recording['servers'];
+	}
+
+	public function getRecordingSecret(): string {
+		$config = $this->config->getAppValue('spreed', 'recording_servers');
+		$recording = json_decode($config, true);
+
+		if (!is_array($recording)) {
+			return '';
+		}
+
+		return $recording['secret'];
+	}
+
 	public function isRecordingEnabled(): bool {
 		$isSignalingInternal = $this->getSignalingMode() === self::SIGNALING_INTERNAL;
 		$isSignalingDev = $this->isSignalingDev();

lib/Controller/RecordingController.php

@@ -26,32 +26,96 @@ declare(strict_types=1);
 namespace OCA\Talk\Controller;
 
 use InvalidArgumentException;
+use GuzzleHttp\Exception\ConnectException;
 use OCA\Talk\Config;
-use OCA\Talk\Exceptions\UnauthorizedException;
 use OCA\Talk\Service\RecordingService;
-use OCA\Talk\Service\SIPBridgeService;
 use OCP\AppFramework\Http;
 use OCP\AppFramework\Http\DataResponse;
+use OCP\Http\Client\IClientService;
 use OCP\IRequest;
+use Psr\Log\LoggerInterface;
 
 class RecordingController extends AEnvironmentAwareController {
 	public function __construct(
 		string $appName,
 		IRequest $request,
+		private ?string $userId,
 		private Config $talkConfig,
-		private SIPBridgeService $SIPBridgeService,
-		private RecordingService $recordingService
+		private IClientService $clientService,
+		private RecordingService $recordingService,
+		private LoggerInterface $logger
 	) {
 		parent::__construct($appName, $request);
 	}
 
+	public function getWelcomeMessage(int $serverId): DataResponse {
+		$recordingServers = $this->talkConfig->getRecordingServers();
+		if (empty($recordingServers) || !isset($recordingServers[$serverId])) {
+			return new DataResponse([], Http::STATUS_NOT_FOUND);
+		}
+
+		$url = rtrim($recordingServers[$serverId]['server'], '/');
+
+		$client = $this->clientService->newClient();
+		try {
+			$response = $client->get($url . '/api/v1/welcome', [
+				'verify' => (bool) $recordingServers[$serverId]['verify'],
+				'nextcloud' => [
+					'allow_local_address' => true,
+				],
+			]);
+
+			$body = $response->getBody();
+			$data = json_decode($body, true);
+
+			if (!is_array($data)) {
+				return new DataResponse([
+					'error' => 'JSON_INVALID',
+				], Http::STATUS_INTERNAL_SERVER_ERROR);
+			}
+
+			return new DataResponse($data);
+		} catch (ConnectException $e) {
+			return new DataResponse(['error' => 'CAN_NOT_CONNECT'], Http::STATUS_INTERNAL_SERVER_ERROR);
+		} catch (\Exception $e) {
+			return new DataResponse(['error' => $e->getCode()], Http::STATUS_INTERNAL_SERVER_ERROR);
+		}
+	}
+
 	/**
-	 * @PublicPage
-	 * @RequireModeratorParticipant
+	 * Check if the current request is coming from an allowed backend.
+	 *
+	 * The backends are sending the custom header "Talk-Recording-Random"
+	 * containing at least 32 bytes random data, and the header
+	 * "Talk-Recording-Checksum", which is the SHA256-HMAC of the random data
+	 * and the body of the request, calculated with the shared secret from the
+	 * configuration.
+	 *
+	 * @param string $data
+	 * @return bool
+	 */
+	private function validateBackendRequest(string $data): bool {
+		$random = $this->request->getHeader('Talk-Recording-Random');
+		if (empty($random) || strlen($random) < 32) {
+			$this->logger->debug("Missing random");
+			return false;
+		}
+		$checksum = $this->request->getHeader('Talk-Recording-Checksum');
+		if (empty($checksum)) {
+			$this->logger->debug("Missing checksum");
+			return false;
+		}
+		$hash = hash_hmac('sha256', $random . $data, $this->talkConfig->getRecordingSecret());
+		return hash_equals($hash, strtolower($checksum));
+	}
+
+	/**
+	 * @NoAdminRequired
+	 * @RequireLoggedInModeratorParticipant
 	 */
 	public function start(int $status): DataResponse {
 		try {
-			$this->recordingService->start($this->room, $status);
+			$this->recordingService->start($this->room, $status, $this->userId);
 		} catch (InvalidArgumentException $e) {
 			return new DataResponse(['error' => $e->getMessage()], Http::STATUS_BAD_REQUEST);
 		}
@@ -59,8 +123,8 @@ class RecordingController extends AEnvironmentAwareController {
 	}
 
 	/**
-	 * @PublicPage
-	 * @RequireModeratorParticipant
+	 * @NoAdminRequired
+	 * @RequireLoggedInModeratorParticipant
 	 */
 	public function stop(): DataResponse {
 		try {
@@ -74,20 +138,20 @@ class RecordingController extends AEnvironmentAwareController {
 	/**
 	 * @PublicPage
 	 * @RequireRoom
-	 * @BruteForceProtection(action=talkSipBridgeSecret)
+	 * @BruteForceProtection(action=talkRecordingSecret)
 	 *
 	 * @return DataResponse
 	 */
 	public function store(string $owner): DataResponse {
-		try {
-			$random = $this->request->getHeader('TALK_SIPBRIDGE_RANDOM');
-			$checksum = $this->request->getHeader('TALK_SIPBRIDGE_CHECKSUM');
-			$secret = $this->talkConfig->getSIPSharedSecret();
-			if (!$this->SIPBridgeService->validateSIPBridgeRequest($random, $checksum, $secret, $this->room->getToken())) {
-				throw new UnauthorizedException();
-			}
-		} catch (UnauthorizedException $e) {
-			$response = new DataResponse([], Http::STATUS_UNAUTHORIZED);
+		$data = $this->room->getToken();
+		if (!$this->validateBackendRequest($data)) {
+			$response = new DataResponse([
+				'type' => 'error',
+				'error' => [
+					'code' => 'invalid_request',
+					'message' => 'The request could not be authenticated.',
+				],
+			], Http::STATUS_UNAUTHORIZED);
 			$response->throttle();
 			return $response;
 		}

lib/Recording/BackendNotifier.php

@@ -0,0 +1,168 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2017 Joachim Bauch <bauch@struktur.de>
+ * @copyright Copyright (c) 2023 Daniel Calviño Sánchez <danxuliu@gmail.com>
+ *
+ * @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\Talk\Recording;
+
+use GuzzleHttp\Exception\ConnectException;
+use GuzzleHttp\Exception\ServerException;
+use OCA\Talk\Config;
+use OCA\Talk\Room;
+use OCP\Http\Client\IClientService;
+use OCP\IURLGenerator;
+use OCP\Security\ISecureRandom;
+use Psr\Log\LoggerInterface;
+
+class BackendNotifier {
+	private Config $config;
+	private LoggerInterface $logger;
+	private IClientService $clientService;
+	private ISecureRandom $secureRandom;
+	private IURLGenerator $urlGenerator;
+
+	public function __construct(Config $config,
+								LoggerInterface $logger,
+								IClientService $clientService,
+								ISecureRandom $secureRandom,
+								IURLGenerator $urlGenerator) {
+		$this->config = $config;
+		$this->logger = $logger;
+		$this->clientService = $clientService;
+		$this->secureRandom = $secureRandom;
+		$this->urlGenerator = $urlGenerator;
+	}
+
+	/**
+	 * Perform actual network request to the recording backend.
+	 * This can be overridden in tests.
+	 *
+	 * @param string $url
+	 * @param array $params
+	 * @param int $retries
+	 * @throws \Exception
+	 */
+	protected function doRequest(string $url, array $params, int $retries = 3): void {
+		if (defined('PHPUNIT_RUN')) {
+			// Don't perform network requests when running tests.
+			return;
+		}
+
+		$client = $this->clientService->newClient();
+		try {
+			$response = $client->post($url, $params);
+		} catch (ServerException | ConnectException $e) {
+			if ($retries > 1) {
+				$this->logger->error('Failed to send message to recording server, ' . $retries . ' retries left!', ['exception' => $e]);
+				$this->doRequest($url, $params, $retries - 1);
+			} else {
+				$this->logger->error('Failed to send message to recording server, giving up!', ['exception' => $e]);
+				throw $e;
+			}
+		} catch (\Exception $e) {
+			$this->logger->error('Failed to send message to recording server', ['exception' => $e]);
+			throw $e;
+		}
+	}
+
+	/**
+	 * Perform a request to the recording backend.
+	 *
+	 * @param Room $room
+	 * @param array $data
+	 * @throws \Exception
+	 */
+	private function backendRequest(Room $room, array $data): void {
+		$recordingServers = $this->config->getRecordingServers();
+		if (empty($recordingServers)) {
+			$this->logger->error('No configured recording server');
+			return;
+		}
+
+		// FIXME Currently clustering is not implemented in the recording
+		// server, so for now only the first configured server is taken into
+		// account to ensure that all the "stop" requests are sent to the same
+		// server that received the "start" request.
+		$recording = $recordingServers[0];
+		$recording['server'] = rtrim($recording['server'], '/');
+
+		$url = '/api/v1/room/' . $room->getToken();
+		$url = $recording['server'] . $url;
+		if (strpos($url, 'wss://') === 0) {
+			$url = 'https://' . substr($url, 6);
+		} elseif (strpos($url, 'ws://') === 0) {
+			$url = 'http://' . substr($url, 5);
+		}
+		$body = json_encode($data);
+		$headers = [
+			'Content-Type' => 'application/json',
+		];
+
+		$random = $this->secureRandom->generate(64);
+		$hash = hash_hmac('sha256', $random . $body, $this->config->getRecordingSecret());
+		$headers['Talk-Recording-Random'] = $random;
+		$headers['Talk-Recording-Checksum'] = $hash;
+		$headers['Talk-Recording-Backend'] = $this->urlGenerator->getAbsoluteURL('');
+
+		$params = [
+			'headers' => $headers,
+			'body' => $body,
+			'nextcloud' => [
+				'allow_local_address' => true,
+			],
+		];
+		if (empty($recording['verify'])) {
+			$params['verify'] = false;
+		}
+		$this->doRequest($url, $params);
+	}
+
+	public function start(Room $room, int $status, string $owner): void {
+		$start = microtime(true);
+		$this->backendRequest($room, [
+			'type' => 'start',
+			'start' => [
+				'status' => $status,
+				'owner' => $owner,
+			],
+		]);
+		$duration = microtime(true) - $start;
+		$this->logger->debug('Send start message: {token} ({duration})', [
+			'token' => $room->getToken(),
+			'duration' => sprintf('%.2f', $duration),
+			'app' => 'spreed-recording',
+		]);
+	}
+
+	public function stop(Room $room): void {
+		$start = microtime(true);
+		$this->backendRequest($room, [
+			'type' => 'stop',
+		]);
+		$duration = microtime(true) - $start;
+		$this->logger->debug('Send stop message: {token} ({duration})', [
+			'token' => $room->getToken(),
+			'duration' => sprintf('%.2f', $duration),
+			'app' => 'spreed-recording',
+		]);
+	}
+}

lib/Service/RecordingService.php

@@ -32,6 +32,7 @@ use OCA\Talk\Config;
 use OCA\Talk\Exceptions\ParticipantNotFoundException;
 use OCA\Talk\Manager;
 use OCA\Talk\Participant;
+use OCA\Talk\Recording\BackendNotifier;
 use OCA\Talk\Room;
 use OCP\AppFramework\Utility\ITimeFactory;
 use OCP\Files\File;
@@ -49,6 +50,7 @@ class RecordingService {
 	public const DEFAULT_ALLOWED_RECORDING_FORMATS = [
 		'audio/ogg' => ['ogg'],
 		'video/ogg' => ['ogv'],
+		'video/webm' => ['webm'],
 		'video/x-matroska' => ['mkv'],
 	];
 
@@ -64,10 +66,11 @@ class RecordingService {
 		protected ShareManager $shareManager,
 		protected ChatManager $chatManager,
 		protected LoggerInterface $logger,
+		protected BackendNotifier $backendNotifier
 	) {
 	}
 
-	public function start(Room $room, int $status): void {
+	public function start(Room $room, int $status, string $owner): void {
 		$availableRecordingTypes = [Room::RECORDING_VIDEO, Room::RECORDING_AUDIO];
 		if (!in_array($status, $availableRecordingTypes)) {
 			throw new InvalidArgumentException('status');
@@ -78,6 +81,9 @@ class RecordingService {
 		if (!$room->getActiveSince() instanceof \DateTimeInterface) {
 			throw new InvalidArgumentException('call');
 		}
+
+		$this->backendNotifier->start($room, $status, $owner);
+
 		$this->roomService->setCallRecording($room, $status);
 	}
 
@@ -85,6 +91,9 @@ class RecordingService {
 		if ($room->getCallRecording() === Room::RECORDING_NONE) {
 			return;
 		}
+
+		$this->backendNotifier->stop($room);
+
 		$this->roomService->setCallRecording($room);
 	}
 
@@ -116,6 +125,7 @@ class RecordingService {
 			$file['error'] !== 0 ||
 			!is_uploaded_file($file['tmp_name'])
 		) {
+			$this->logger->warning("Uploaded file might be larger than allowed by PHP settings 'upload_max_filesize' or 'post_max_size'");
 			throw new InvalidArgumentException('invalid_file');
 		}
 
@@ -132,11 +142,13 @@ class RecordingService {
 		$mimeType = $this->mimeTypeDetector->detectString($content);
 		$allowed = self::DEFAULT_ALLOWED_RECORDING_FORMATS;
 		if (!array_key_exists($mimeType, $allowed)) {
+			$this->logger->warning("Uploaded file detected mime type ($mimeType) is not allowed");
 			throw new InvalidArgumentException('file_mimetype');
 		}
 
 		$extension = strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
 		if (!$extension || !in_array($extension, $allowed[$mimeType])) {
+			$this->logger->warning("Uploaded file extensions ($extension) is not allowed for the detected mime type ($mimeType)");
 			throw new InvalidArgumentException('file_extension');
 		}
 	}

lib/Settings/Admin/AdminSettings.php

@@ -89,6 +89,7 @@ class AdminSettings implements ISettings {
 		$this->initTurnServers();
 		$this->initSignalingServers();
 		$this->initRequestSignalingServerTrial();
+		$this->initRecordingServers();
 		$this->initSIPBridge();
 
 
@@ -472,6 +473,13 @@ class AdminSettings implements ISettings {
 		]);
 	}
 
+	protected function initRecordingServers(): void {
+		$this->initialState->provideInitialState('recording_servers', [
+			'servers' => $this->talkConfig->getRecordingServers(),
+			'secret' => $this->talkConfig->getRecordingSecret(),
+		]);
+	}
+
 	protected function initSIPBridge(): void {
 		$groups = $this->getGroupDetailsArray($this->talkConfig->getSIPGroups(), 'sip_bridge_groups');
 

psalm.xml

@@ -77,6 +77,8 @@
 		<file name="tests/stubs/oc_comments_comment.php" />
 		<file name="tests/stubs/oc_comments_manager.php" />
 		<file name="tests/stubs/oc_hooks_emitter.php" />
+		<file name="tests/stubs/GuzzleHttp_Exception_ConnectException.php" />
+		<file name="tests/stubs/GuzzleHttp_Exception_ServerException.php" />
 		<file name="tests/stubs/Symfony_Component_EventDispatcher_GenericEvent.php" />
 	</stubs>
 </psalm>

recording/LICENSE.txt

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU Affero General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
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recording/docs/index.md

@@ -0,0 +1,5 @@
+# Nextcloud Talk Recording Server Documentation
+
+## API
+
+* [Recording API](recording-api.md)

recording/docs/recording-api.md

@@ -0,0 +1,52 @@
+# Nextcloud Talk Recording Server API
+
+* API v1: Base endpoint `/api/v1`
+
+## Get welcome message
+
+* Method: `GET`
+* Endpoint: `/welcome`
+
+* Response:
+    - Status code:
+        + `200 OK`
+
+## Requests from the Nextcloud server
+
+* Method: `POST`
+* Endpoint: `/room/{token}`
+
+* Header:
+
+| field                     | type   | Description                                                                                                                         |
+| ------------------------- | ------ | ----------------------------------------------------------------------------------------------------------------------------------- |
+| `TALK_RECORDING_BACKEND`  | string | The base URL of the Nextcloud server sending the request.                                                                           |
+| `TALK_RECORDING_RANDOM`   | string | Random string that needs to be concatenated with request body to generate the checksum using the secret configured for the backend. |
+| `TALK_RECORDING_CHECKSUM` | string | The checksum generated with `TALK_RECORDING_RANDOM`.                                                                                |
+
+* Response:
+    - Status code:
+        + `200 OK`
+        + `400 Bad Request`: When the body size exceeds the maximum allowed message size.
+        + `400 Bad Request`: When the body data does not match the expected format.
+        + `403 Forbidden`: When the request validation failed.
+
+### Start call recording
+
+* Data format (JSON):
+
+    {
+      "type": "start",
+      "start": {
+        "status": "the-type-of-recording (1 for audio and video, 2 for audio only)",
+        "owner": "the-user-to-upload-the-resulting-file-as",
+      }
+    }
+
+### Stop call recording
+
+* Data format:
+
+    {
+      "type": "stop",
+    }

recording/pyproject.toml

@@ -0,0 +1,19 @@
+[project]
+name = "nextcloud-talk-recording"
+description = "Recording server for Nextcloud Talk"
+license = {text = "GNU AGPLv3+"}
+classifiers = [
+    "License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)",
+]
+dependencies = [
+    "flask",
+    "pulsectl",
+    "pyvirtualdisplay>=2.0",
+    "selenium>=4.6.0",
+    "urllib3",
+    "websocket-client",
+]
+dynamic = ["version"]
+
+[tool.setuptools.dynamic]
+version = {attr = "nextcloud.talk.recording.__version__"}

recording/server.conf.in

@@ -0,0 +1,67 @@
+[logs]
+# Log level based on numeric values of Python logging levels:
+# - Critical: 50
+# - Error:    40
+# - Warning:  30
+# - Info:     20
+# - Debug:    10
+# - Not set:   0
+#level = 20
+
+[http]
+# IP and port to listen on for HTTP requests.
+#listen = 127.0.0.1:8000
+
+[backend]
+# Allow any hostname as backend endpoint. This is extremely insecure and should
+# only be used during development.
+#allowall = false
+
+# Common shared secret for requests from and to the backend servers if
+# "allowall" is enabled. This must be the same value as configured in the
+# Nextcloud admin ui.
+#secret = the-shared-secret
+
+# Comma-separated list of backend ids allowed to connect.
+#backends = backend-id, another-backend
+
+# If set to "true", certificate validation of backend endpoints will be skipped.
+# This should only be enabled during development, e.g. to work with self-signed
+# certificates.
+# Overridable by backend.
+#skipverify = false
+
+# Maximum allowed size in bytes for messages sent by the backend.
+# Overridable by backend.
+#maxmessagesize = 1024
+
+# Width for recorded videos.
+# Overridable by backend.
+#videowidth = 1920
+
+# Height for recorded videos.
+# Overridable by backend.
+#videoheight = 1080
+
+# Temporary directory used to store recordings until uploaded. It must be
+# writable by the user running the recording server.
+# Overridable by backend.
+#directory = /tmp
+
+# Backend configurations as defined in the "[backend]" section above. The
+# section names must match the ids used in "backends" above.
+#[backend-id]
+# URL of the Nextcloud instance
+#url = https://cloud.domain.invalid
+
+# Shared secret for requests from and to the backend servers. This must be the
+# same value as configured in the Nextcloud admin ui.
+#secret = the-shared-secret
+
+#[another-backend]
+# URL of the Nextcloud instance
+#url = https://cloud.otherdomain.invalid
+
+# Shared secret for requests from and to the backend servers. This must be the
+# same value as configured in the Nextcloud admin ui.
+#secret = the-shared-secret

recording/src/nextcloud/talk/recording/BackendNotifier.py

@@ -0,0 +1,116 @@
+#
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+#
+
+"""
+Module to send requests to the Nextcloud server.
+"""
+
+import hashlib
+import hmac
+import logging
+import os
+import ssl
+from secrets import token_urlsafe
+from urllib.request import Request, urlopen
+from urllib3 import encode_multipart_formdata
+
+from .Config import config
+
+logger = logging.getLogger(__name__)
+
+def getRandomAndChecksum(backend, data):
+    """
+    Returns a random string and the checksum of the given data with that random.
+
+    :param backend: the backend to send the data to.
+    :param data: the data, as bytes.
+    """
+    secret = config.getBackendSecret(backend).encode()
+    random = token_urlsafe(64)
+    hmacValue = hmac.new(secret, random.encode() + data, hashlib.sha256)
+
+    return random, hmacValue.hexdigest()
+
+def doRequest(backend, request, retries=3):
+    """
+    Send the request to the backend.
+
+    SSL verification will be skipped if configured.
+
+    :param backend: the backend to send the request to.
+    :param request: the request to send.
+    :param retries: the number of times to retry in case of failure.
+    """
+    context = None
+
+    if config.getBackendSkipVerify(backend):
+        context = ssl.create_default_context()
+        context.check_hostname = False
+        context.verify_mode = ssl.CERT_NONE
+
+    try:
+        urlopen(request, context=context)
+    except Exception as exception:
+        if retries > 1:
+            logger.exception(f"Failed to send message to backend, {retries} retries left!")
+            doRequest(backend, request, retries - 1)
+        else:
+            logger.exception(f"Failed to send message to backend, giving up!")
+            raise
+
+def uploadRecording(backend, token, fileName, owner):
+    """
+    Upload the recording specified by fileName.
+
+    The name of the uploaded file is the basename of the original file.
+
+    :param backend: the backend to upload the file to.
+    :param token: the token of the conversation that was recorded.
+    :param fileName: the recording file name.
+    :param owner: the owner of the uploaded file.
+    """
+
+    logger.info(f"Upload recording {fileName} to {backend} in {token} as {owner}")
+
+    url = backend + '/ocs/v2.php/apps/spreed/api/v1/recording/' + token + '/store'
+
+    fileContents = None
+    with open(fileName, 'rb') as file:
+        fileContents = file.read()
+
+    # Plain values become arguments, while tuples become files; the body used to
+    # calculate the checksum is empty.
+    data = {
+        'owner': owner,
+        'file': (os.path.basename(fileName), fileContents),
+    }
+    data, contentType = encode_multipart_formdata(data)
+
+    random, checksum = getRandomAndChecksum(backend, token.encode())
+
+    headers = {
+        'Content-Type': contentType,
+        'OCS-ApiRequest': 'true',
+        'Talk-Recording-Random': random,
+        'Talk-Recording-Checksum': checksum,
+    }
+
+    uploadRequest = Request(url, data, headers)
+
+    doRequest(backend, uploadRequest)

recording/src/nextcloud/talk/recording/Config.py

@@ -0,0 +1,160 @@
+#
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+#
+
+"""
+Module for getting the configuration.
+
+Other modules are expected to import the shared "config" object, which will be
+loaded with the configuration file at startup.
+"""
+
+import logging
+import os
+
+from configparser import ConfigParser
+
+class Config:
+    def __init__(self):
+        self._logger = logging.getLogger(__name__)
+
+        self._configParser = ConfigParser()
+
+        self._backendIdsByBackendUrl = {}
+
+    def load(self, fileName):
+        fileName = os.path.abspath(fileName)
+
+        if not os.path.exists(fileName):
+            self._logger.warning(f"Configuration file not found: {fileName}")
+        else:
+            self._logger.info(f"Loading {fileName}")
+
+        self._configParser.read(fileName)
+
+        self._loadBackends()
+
+    def _loadBackends(self):
+        self._backendIdsByBackendUrl = {}
+
+        if 'backend' not in self._configParser or 'backends' not in self._configParser['backend']:
+            self._logger.warning(f"No configured backends")
+
+            return
+
+        backendIds = self._configParser.get('backend', 'backends')
+        backendIds = [backendId.strip() for backendId in backendIds.split(',')]
+
+        for backendId in backendIds:
+            if 'url' not in self._configParser[backendId]:
+                self._logger.error(f"Missing 'url' property for backend {backendId}")
+                continue
+
+            if 'secret' not in self._configParser[backendId]:
+                self._logger.error(f"Missing 'secret' property for backend {backendId}")
+                continue
+
+            backendUrl = self._configParser[backendId]['url'].rstrip('/')
+            self._backendIdsByBackendUrl[backendUrl] = backendId
+
+    def getLogLevel(self):
+        """
+        Returns the log level.
+
+        Defaults to INFO (20).
+        """
+        return int(self._configParser.get('logs', 'level', fallback=logging.INFO))
+
+    def getListen(self):
+        """
+        Returns the IP and port to listen on for HTTP requests.
+
+        Defaults to "127.0.0.1:8000".
+        """
+        return self._configParser.get('http', 'listen', fallback='127.0.0.1:8000')
+
+    def getBackendSecret(self, backendUrl):
+        """
+        Returns the shared secret for requests from and to the backend servers.
+
+        Defaults to None.
+        """
+        if self._configParser.get('backend', 'allowall', fallback=None):
+            return self._configParser.get('backend', 'secret')
+
+        backendUrl = backendUrl.rstrip('/')
+        if backendUrl in self._backendIdsByBackendUrl:
+            backendId = self._backendIdsByBackendUrl[backendUrl]
+
+            return self._configParser.get(backendId, 'secret', fallback=None)
+
+        return None
+
+    def getBackendSkipVerify(self, backendUrl):
+        """
+        Returns whether the certificate validation of backend endpoints should
+        be skipped or not.
+
+        Defaults to False.
+        """
+        return self._getBackendValue(backendUrl, 'skipverify', False) == 'true'
+
+    def getBackendMaximumMessageSize(self, backendUrl):
+        """
+        Returns the maximum allowed size in bytes for messages sent by the
+        backend.
+
+        Defaults to 1024.
+        """
+        return int(self._getBackendValue(backendUrl, 'maxmessagesize', 1024))
+
+    def getBackendVideoWidth(self, backendUrl):
+        """
+        Returns the width for recorded videos.
+
+        Defaults to 1920.
+        """
+        return int(self._getBackendValue(backendUrl, 'videowidth', 1920))
+
+    def getBackendVideoHeight(self, backendUrl):
+        """
+        Returns the height for recorded videos.
+
+        Defaults to 1080.
+        """
+        return int(self._getBackendValue(backendUrl, 'videoheight', 1080))
+
+    def getBackendDirectory(self, backendUrl):
+        """
+        Returns the temporary directory used to store recordings until uploaded.
+
+        Defaults to False.
+        """
+        return self._getBackendValue(backendUrl, 'directory', '/tmp')
+
+    def _getBackendValue(self, backendUrl, key, default):
+        backendUrl = backendUrl.rstrip('/')
+        if backendUrl in self._backendIdsByBackendUrl:
+            backendId = self._backendIdsByBackendUrl[backendUrl]
+
+            if self._configParser.get(backendId, key, fallback=None):
+                return self._configParser.get(backendId, key)
+
+        return self._configParser.get('backend', key, fallback=default)
+
+config = Config()

recording/src/nextcloud/talk/recording/Participant.py

@@ -0,0 +1,424 @@
+#
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+#
+
+"""
+Module to join a call with a browser.
+"""
+
+import json
+import logging
+import threading
+import websocket
+
+from datetime import datetime
+from selenium import webdriver
+from selenium.webdriver.common.by import By
+from selenium.webdriver.firefox.service import Service as FirefoxService
+from selenium.webdriver.support.wait import WebDriverWait
+from shutil import disk_usage
+from time import sleep
+
+class BiDiLogsHelper:
+    """
+    Helper class to get browser logs using the BiDi protocol.
+
+    A new thread is started by each object to receive the logs, so they can be
+    printed in real time even if the main thread is waiting for some script to
+    finish.
+    """
+
+    def __init__(self, driver, parentLogger):
+        if not 'webSocketUrl' in driver.capabilities:
+            raise Exception('webSocketUrl not found in capabilities')
+
+        self._logger = parentLogger.getChild('BiDiLogsHelper')
+
+        self.realtimeLogsEnabled = False
+        self.pendingLogs = []
+        self.logsLock = threading.Lock()
+
+        # Web socket connection is rejected by Firefox with "Bad request" if
+        # "Origin" header is present; logs show:
+        # "The handshake request has incorrect Origin header".
+        self.websocket = websocket.create_connection(driver.capabilities['webSocketUrl'], suppress_origin=True)
+
+        self.websocket.send(json.dumps({
+            'id': 1,
+            'method': 'session.subscribe',
+            'params': {
+                'events': ['log.entryAdded'],
+            },
+        }))
+
+        self.initialLogsLock = threading.Lock()
+        self.initialLogsLock.acquire()
+
+        self.loggingThread = threading.Thread(target=self.__processLogEvents, daemon=True)
+        self.loggingThread.start()
+
+        # Do not return until the existing logs were fetched, except if it is
+        # taking too long.
+        self.initialLogsLock.acquire(timeout=10)
+
+    def __del__(self):
+        if self.websocket:
+            self.websocket.close()
+
+        if self.loggingThread:
+            self.loggingThread.join()
+
+    def __messageFromEvent(self, event):
+            if not 'params' in event:
+                return '???'
+
+            method = ''
+            if 'method' in event['params']:
+                method = event['params']['method']
+            elif 'level' in event['params']:
+                method = event['params']['level'] if event['params']['level'] != 'warning' else 'warn'
+
+            text = ''
+            if 'text' in event['params']:
+                text = event['params']['text']
+
+            time = '??:??:??'
+            if 'timestamp' in event['params']:
+                timestamp = event['params']['timestamp']
+
+                # JavaScript timestamps are millisecond based, Python timestamps
+                # are second based.
+                time = datetime.fromtimestamp(timestamp / 1000).strftime('%H:%M:%S')
+
+            methodShort = '?'
+            if method == 'error':
+                methodShort = 'E'
+            elif method == 'warn':
+                methodShort = 'W'
+            elif method == 'log':
+                methodShort = 'L'
+            elif method == 'info':
+                methodShort = 'I'
+            elif method == 'debug':
+                methodShort = 'D'
+
+            return time + ' ' + methodShort + ' ' + text
+
+    def __processLogEvents(self):
+        while True:
+            try:
+                event = json.loads(self.websocket.recv())
+            except:
+                self._logger.debug('BiDi WebSocket closed')
+                return
+
+            if 'id' in event and event['id'] == 1:
+                self.initialLogsLock.release()
+                continue
+
+            if not 'method' in event or event['method'] != 'log.entryAdded':
+                continue
+
+            message = self.__messageFromEvent(event)
+
+            with self.logsLock:
+                if self.realtimeLogsEnabled:
+                    self._logger.debug(message)
+                else:
+                    self.pendingLogs.append(message)
+
+    def clearLogs(self):
+        """
+        Clears, without printing, the logs received while realtime logs were not
+        enabled.
+        """
+
+        with self.logsLock:
+            self.pendingLogs = []
+
+    def printLogs(self):
+        """
+        Prints the logs received while realtime logs were not enabled.
+
+        The logs are cleared after printing them.
+        """
+
+        with self.logsLock:
+            for log in self.pendingLogs:
+                self._logger.debug(log)
+
+            self.pendingLogs = []
+
+    def setRealtimeLogsEnabled(self, realtimeLogsEnabled):
+        """
+        Enable or disable realtime logs.
+
+        If logs are received while realtime logs are not enabled they can be
+        printed using "printLogs()".
+        """
+
+        with self.logsLock:
+            self.realtimeLogsEnabled = realtimeLogsEnabled
+
+
+class SeleniumHelper:
+    """
+    Helper class to start a browser and execute scripts in it using WebDriver.
+
+    The browser is expected to be available in the local system.
+    """
+
+    def __init__(self, parentLogger):
+        self._parentLogger = parentLogger
+        self._logger = parentLogger.getChild('SeleniumHelper')
+
+        self.driver = None
+        self.bidiLogsHelper = None
+
+    def __del__(self):
+        if self.driver:
+            # The session must be explicitly quit to remove the temporary files
+            # created in "/tmp".
+            self.driver.quit()
+
+    def startFirefox(self, width, height, env):
+        """
+        Starts a Firefox instance.
+
+        :param width: the width of the browser window.
+        :param height: the height of the browser window.
+        :param env: the environment variables, including the display to start
+                    the browser in.
+        """
+
+        options = webdriver.FirefoxOptions()
+
+        # "webSocketUrl" is needed for BiDi; this should be set already by
+        # default, but just in case.
+        options.set_capability('webSocketUrl', True)
+        # In Firefox < 101 BiDi protocol was not enabled by default, although it
+        # works fine for getting the logs with Firefox 99, so it is explicitly
+        # enabled.
+        # https://bugzilla.mozilla.org/show_bug.cgi?id=1753997
+        options.set_preference('remote.active-protocols', 3)
+
+        options.set_preference('media.navigator.permission.disabled', True)
+
+        options.add_argument('--kiosk')
+        options.add_argument(f'--width={width}')
+        options.add_argument(f'--height={height}')
+
+        if disk_usage('/tmp').free < 134217728:
+            self._logger.warning('Less than 128 MiB available in "/tmp", strange failures may occur')
+
+        service = FirefoxService(
+            env=env,
+        )
+
+        self.driver = webdriver.Firefox(
+            options=options,
+            service=service,
+        )
+
+        self.bidiLogsHelper = BiDiLogsHelper(self.driver, self._parentLogger)
+
+    def clearLogs(self):
+        """
+        Clears browser logs not printed yet.
+
+        This does not affect the logs in the browser itself, only the ones
+        received by the SeleniumHelper.
+        """
+
+        if self.bidiLogsHelper:
+            self.bidiLogsHelper.clearLogs()
+            return
+
+        self.driver.get_log('browser')
+
+    def printLogs(self):
+        """
+        Prints browser logs received since last print.
+
+        These logs do not include realtime logs, as they are printed as soon as
+        they are received.
+        """
+
+        if self.bidiLogsHelper:
+            self.bidiLogsHelper.printLogs()
+            return
+
+        for log in self.driver.get_log('browser'):
+            self._logger.debug(log['message'])
+
+    def execute(self, script):
+        """
+        Executes the given script.
+
+        If the script contains asynchronous code "executeAsync()" should be used
+        instead to properly wait until the asynchronous code finished before
+        returning.
+
+        Technically Chrome (unlike Firefox) works as expected with something
+        like "execute('await someFunctionCall(); await anotherFunctionCall()'",
+        but "executeAsync" has to be used instead for something like
+        "someFunctionReturningAPromise().then(() => { more code })").
+
+        If realtime logs are available logs are printed as soon as they are
+        received. Otherwise they will be printed once the script has finished.
+        """
+
+        # Real time logs are enabled while the command is being executed.
+        if self.bidiLogsHelper:
+            self.printLogs()
+            self.bidiLogsHelper.setRealtimeLogsEnabled(True)
+
+        self.driver.execute_script(script)
+
+        if self.bidiLogsHelper:
+            # Give it some time to receive the last real time logs before
+            # disabling them again.
+            sleep(0.5)
+
+            self.bidiLogsHelper.setRealtimeLogsEnabled(False)
+
+        self.printLogs()
+
+    def executeAsync(self, script):
+        """
+        Executes the given script asynchronously.
+
+        This function should be used to execute JavaScript code that needs to
+        wait for a promise to be fulfilled, either explicitly or through "await"
+        calls.
+
+        The script needs to explicitly signal that the execution has finished by
+        including the special text "{RETURN}" (without quotes). If "{RETURN}" is
+        not included the function will automatically return once all the root
+        statements of the script were executed (which works as expected if using
+        "await" calls, but not if the script includes something like
+        "someFunctionReturningAPromise().then(() => { more code })"; in that
+        case the script should be written as
+        "someFunctionReturningAPromise().then(() => { more code {RETURN} })").
+
+        If realtime logs are available logs are printed as soon as they are
+        received. Otherwise they will be printed once the script has finished.
+        """
+
+        # Real time logs are enabled while the command is being executed.
+        if self.bidiLogsHelper:
+            self.printLogs()
+            self.bidiLogsHelper.setRealtimeLogsEnabled(True)
+
+        # Add an explicit return point at the end of the script if none is
+        # given.
+        if script.find('{RETURN}') == -1:
+            script += '{RETURN}'
+
+        # await is not valid in the root context in Firefox, so the script to be
+        # executed needs to be wrapped in an async function.
+        script = '(async() => { ' + script  + ' })().catch(error => { console.error(error) {RETURN} })'
+
+        # Asynchronous scripts need to explicitly signal that they are finished
+        # by invoking the callback injected as the last argument.
+        # https://www.selenium.dev/documentation/legacy/json_wire_protocol/#sessionsessionidexecute_async
+        script = script.replace('{RETURN}', '; arguments[arguments.length - 1]()')
+
+        self.driver.execute_async_script(script)
+
+        if self.bidiLogsHelper:
+            # Give it some time to receive the last real time logs before
+            # disabling them again.
+            sleep(0.5)
+
+            self.bidiLogsHelper.setRealtimeLogsEnabled(False)
+
+        self.printLogs()
+
+
+class Participant():
+    """
+    Wrapper for a real participant in Talk.
+
+    This wrapper exposes functions to use a real participant in a browser.
+    """
+
+    def __init__(self, browser, nextcloudUrl, width, height, env, parentLogger):
+        """
+        Starts a real participant in the given Nextcloud URL using the given
+        browser.
+
+        :param browser: currently only "firefox" is supported.
+        :param nextcloudUrl: the URL of the Nextcloud instance to start the real
+            participant in.
+        :param width: the width of the browser window.
+        :param height: the height of the browser window.
+        :param env: the environment variables, including the display to start
+                    the browser in.
+        :param parentLogger: the parent logger to get a child from.
+        """
+
+        # URL should not contain a trailing '/', as that could lead to a double
+        # '/' which may prevent Talk UI from loading as expected.
+        self.nextcloudUrl = nextcloudUrl.rstrip('/')
+
+        self.seleniumHelper = SeleniumHelper(parentLogger)
+
+        if browser == 'firefox':
+            self.seleniumHelper.startFirefox(width, height, env)
+        else:
+            raise Exception('Invalid browser: ' + browser)
+
+        self.seleniumHelper.driver.get(nextcloudUrl)
+
+    def joinCall(self, token):
+        """
+        Joins (or starts) the call in the room with the given token.
+
+        The participant will join as a guest.
+
+        :param token: the token of the room to join.
+        """
+
+        self.seleniumHelper.driver.get(self.nextcloudUrl + '/index.php/call/' + token)
+
+        # Hack to prevent the participant from using any device that might be
+        # available, including PulseAudio's "Monitor of Dummy Output".
+        self.seleniumHelper.execute('navigator.mediaDevices.getUserMedia = async function() { throw new Error() }')
+
+        WebDriverWait(self.seleniumHelper.driver, timeout=30).until(lambda driver: driver.find_element(By.CSS_SELECTOR, '.top-bar #call_button:not(:disabled)'))
+        self.seleniumHelper.driver.find_element(By.CSS_SELECTOR, '.top-bar #call_button').click()
+
+        try:
+            # If the device selector is shown click on the "Join call" button
+            # in the dialog to actually join the call.
+            WebDriverWait(self.seleniumHelper.driver, timeout=5).until(lambda driver: driver.find_element(By.CSS_SELECTOR, '.device-checker #call_button'))
+            self.seleniumHelper.driver.find_element(By.CSS_SELECTOR, '.device-checker #call_button').click()
+        except:
+            pass
+
+    def leaveCall(self):
+        """
+        Leaves the current call.
+
+        The call must have been joined first.
+        """
+
+        self.seleniumHelper.executeAsync('''
+            await OCA.Talk.SimpleWebRTC.connection.leaveCurrentCall()
+        ''')

recording/src/nextcloud/talk/recording/Server.py

@@ -0,0 +1,203 @@
+#
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+#
+
+"""
+Module to handle incoming requests.
+"""
+
+import atexit
+import json
+import hashlib
+import hmac
+from threading import Lock, Thread
+
+from flask import Flask, jsonify, request
+from werkzeug.exceptions import BadRequest, Forbidden
+
+from nextcloud.talk import recording
+from .Config import config
+from .Service import RECORDING_STATUS_AUDIO_AND_VIDEO, Service
+
+app = Flask(__name__)
+
+services = {}
+servicesLock = Lock()
+
+@app.route("/api/v1/welcome", methods=["GET"])
+def welcome():
+    return jsonify(version=recording.__version__)
+
+@app.route("/api/v1/room/<token>", methods=["POST"])
+def handleBackendRequest(token):
+    backend, data = _validateRequest()
+
+    if 'type' not in data:
+        raise BadRequest()
+
+    if data['type'] == 'start':
+        return startRecording(backend, token, data)
+
+    if data['type'] == 'stop':
+        return stopRecording(backend, token, data)
+
+def _validateRequest():
+    """
+    Validates the current request.
+
+    :return: the backend that sent the request and the object representation of
+             the body.
+    """
+
+    if 'Talk-Recording-Backend' not in request.headers:
+        app.logger.warning("Missing Talk-Recording-Backend header")
+        raise Forbidden()
+
+    backend = request.headers['Talk-Recording-Backend']
+
+    secret = config.getBackendSecret(backend)
+    if not secret:
+        app.logger.warning(f"No secret configured for backend {backend}")
+        raise Forbidden()
+
+    if 'Talk-Recording-Random' not in request.headers:
+        app.logger.warning("Missing Talk-Recording-Random header")
+        raise Forbidden()
+
+    random = request.headers['Talk-Recording-Random']
+
+    if 'Talk-Recording-Checksum' not in request.headers:
+        app.logger.warning("Missing Talk-Recording-Checksum header")
+        raise Forbidden()
+
+    checksum = request.headers['Talk-Recording-Checksum']
+
+    maximumMessageSize = config.getBackendMaximumMessageSize(backend)
+
+    if not request.content_length or request.content_length > maximumMessageSize:
+        app.logger.warning(f"Message size above limit: {request.content_length} {maximumMessageSize}")
+        raise BadRequest()
+
+    body = request.get_data()
+
+    expectedChecksum = _calculateChecksum(secret, random, body)
+    if not hmac.compare_digest(checksum, expectedChecksum):
+        app.logger.warning(f"Checksum verification failed: {checksum} {expectedChecksum}")
+        raise Forbidden()
+
+    return backend, json.loads(body)
+
+def _calculateChecksum(secret, random, body):
+    secret = secret.encode()
+    message = random.encode() + body
+
+    hmacValue = hmac.new(secret, message, hashlib.sha256)
+
+    return hmacValue.hexdigest()
+
+def startRecording(backend, token, data):
+    serviceId = f'{backend}-{token}'
+
+    if 'start' not in data:
+        raise BadRequest()
+
+    if 'owner' not in data['start']:
+        raise BadRequest()
+
+    status = RECORDING_STATUS_AUDIO_AND_VIDEO
+    if 'status' in data['start']:
+        status = data['start']['status']
+
+    owner = data['start']['owner']
+
+    service = None
+    with servicesLock:
+        if serviceId in services:
+            app.logger.warning(f"Trying to start recording again: {backend} {token}")
+            return {}
+
+        service = Service(backend, token, status, owner)
+
+        services[serviceId] = service
+
+    app.logger.info(f"Start recording: {backend} {token}")
+
+    serviceStartThread = Thread(target=_startRecordingService, args=[service], daemon=True)
+    serviceStartThread.start()
+
+    return {}
+
+def _startRecordingService(service):
+    """
+    Helper function to start a recording service.
+
+    The recording service will be removed from the list of services if it can
+    not be started.
+
+    :param service: the Service to start.
+    """
+    serviceId = f'{service.backend}-{service.token}'
+
+    try:
+        service.start()
+    except Exception as exception:
+        with servicesLock:
+            if serviceId not in services:
+                # Service was already stopped, exception should have been caused
+                # by stopping the helpers even before the recorder started.
+                app.logger.info(f"Recording stopped before starting: {service.backend} {service.token}", exc_info=exception)
+                
+                return
+
+            app.logger.exception(f"Failed to start recording: {service.backend} {service.token}")
+
+            services.pop(serviceId)
+
+def stopRecording(backend, token, data):
+    serviceId = f'{backend}-{token}'
+
+    service = None
+    with servicesLock:
+        if serviceId not in services:
+            app.logger.warning(f"Trying to stop unknown recording: {backend} {token}")
+            return {}
+
+        service = services[serviceId]
+
+        services.pop(serviceId)
+
+    app.logger.info(f"Stop recording: {backend} {token}")
+
+    serviceStopThread = Thread(target=service.stop, daemon=True)
+    serviceStopThread.start()
+
+    return {}
+
+# Despite this handler it seems that in some cases the geckodriver could have
+# been killed already when it is executed, which unfortunately prevents a proper
+# cleanup of the temporary files opened by the browser.
+def _stopServicesOnExit():
+    with servicesLock:
+        serviceIds = list(services.keys())
+        for serviceId in serviceIds:
+            service = services.pop(serviceId)
+            del service
+
+# Services should be explicitly deleted before exiting, as if they are
+# implicitly deleted while exiting the Selenium driver may not cleanly quit.
+atexit.register(_stopServicesOnExit)

recording/src/nextcloud/talk/recording/Service.py

@@ -0,0 +1,312 @@
+#
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+#
+
+"""
+Module to start and stop the recording for a specific call.
+"""
+
+import logging
+import os
+import pulsectl
+import subprocess
+from datetime import datetime
+from pyvirtualdisplay import Display
+from secrets import token_urlsafe
+from threading import Thread
+
+from . import BackendNotifier
+from .Config import config
+from .Participant import Participant
+
+RECORDING_STATUS_AUDIO_AND_VIDEO = 1
+RECORDING_STATUS_AUDIO_ONLY = 2
+
+def getRecorderArgs(status, displayId, audioSinkIndex, width, height, extensionlessOutputFileName):
+    """
+    Returns the list of arguments to start the recorder process.
+
+    :param status: whether to record audio and video or only audio.
+    :param displayId: the ID of the display that the browser is running in.
+    :param audioSinkIndex: the index of the sink for the browser audio output.
+    :param width: the width of the display and the recording.
+    :param height: the height of the display and the recording.
+    :param extensionlessOutputFileName: the file name for the recording, without
+           extension.
+    :returns: the file name for the recording, with extension.
+    """
+
+    ffmpegCommon = ['ffmpeg', '-loglevel', 'level+warning', '-n']
+    ffmpegInputAudio = ['-f', 'pulse', '-i', audioSinkIndex]
+    ffmpegInputVideo = ['-f', 'x11grab', '-draw_mouse', '0', '-video_size', f'{width}x{height}', '-i', displayId]
+    ffmpegOutputAudio = ['-c:a', 'libopus']
+    ffmpegOutputVideo = ['-c:v', 'libvpx', '-quality:v', 'realtime']
+
+    extension = '.ogg'
+    if status == RECORDING_STATUS_AUDIO_AND_VIDEO:
+        extension = '.webm'
+
+    outputFileName = extensionlessOutputFileName + extension
+
+    ffmpegArgs = ffmpegCommon
+    ffmpegArgs += ffmpegInputAudio
+
+    if status == RECORDING_STATUS_AUDIO_AND_VIDEO:
+        ffmpegArgs += ffmpegInputVideo
+
+    ffmpegArgs += ffmpegOutputAudio
+
+    if status == RECORDING_STATUS_AUDIO_AND_VIDEO:
+        ffmpegArgs += ffmpegOutputVideo
+
+    return ffmpegArgs + [outputFileName]
+
+def newAudioSink(sanitizedBackend, token):
+    """
+    Start new audio sink for the audio output of the browser.
+
+    Each browser instance uses its own sink that will then be captured by the
+    recorder. Otherwise several browsers would use the same default sink, and
+    their audio output would be mixed.
+
+    The sink is created by loading a null sink module. This module needs to be
+    unloaded once the sink is no longer needed to remove it.
+
+    :param sanitizedBackend: the backend of the call; it is expected to have
+           been sanitized and to contain only alpha-numeric characters.
+    :param token: the token of the call.
+    :return: a tuple with the module index and the sink index, both as ints.
+    """
+
+    # A random value is appended to the backend and token to "ensure" that there
+    # will be no name clashes if a previous sink for that backend and module was
+    # not unloaded yet.
+    sinkName = f"{sanitizedBackend}-{token}-{token_urlsafe(32)}"
+
+    # Module names can be, at most, 127 characters, so the name is truncated if
+    # needed.
+    sinkName = sinkName[:127]
+
+    with pulsectl.Pulse(f"{sinkName}-loader") as pacmd:
+        pacmd.module_load("module-null-sink", f"sink_name={sinkName}")
+
+        moduleIndex = None
+        moduleList = pacmd.module_list()
+        for module in moduleList:
+            if module.argument == f"sink_name={sinkName}":
+                moduleIndex = module.index
+
+        if not moduleIndex:
+            raise Exception(f"New audio module for sink {sinkName} not found ({moduleList})")
+
+        sinkIndex = None
+        sinkList = pacmd.sink_list()
+        for sink in sinkList:
+            if sink.name == sinkName:
+                sinkIndex = sink.index
+
+        if not sinkIndex:
+            raise Exception(f"New audio sink {sinkName} not found ({sinkList})")
+
+    return moduleIndex, sinkIndex
+
+def recorderLog(backend, token, pipe):
+    """
+    Logs the recorder output.
+
+    :param backend: the backend of the call.
+    :param token: the token of the call.
+    :param pipe: Pipe to the recorder process output.
+    """
+    logger = logging.getLogger(f"{__name__}.recorder-{backend}-{token}")
+
+    with pipe:
+        for line in pipe:
+            # Lines captured from the recorder have a trailing new line, so it
+            # needs to be removed.
+            logger.info(line.rstrip('\n'))
+
+class Service:
+    """
+    Class to set up and tear down the needed elements to record a call.
+
+    To record a call a virtual display server and an audio sink are created.
+    Then a browser is launched in kiosk mode inside the virtual display server,
+    and its audio is routed to the audio sink. This ensures that several
+    Services / browsers can be running at the same time without interfering with
+    each other, and that the virtual display driver will only show the browser
+    contents, without any browser UI. Then the call is joined in the browser,
+    and an FFMPEG process to record the virtual display driver and the audio
+    sink is started.
+
+    Once the recording is stopped the helper elements are also stopped and the
+    recording is uploaded to the Nextcloud server.
+
+    "start()" blocks until the recording ends, so "start()" and "stop()" are
+    expected to be called from different threads.
+    """
+
+    def __init__(self, backend, token, status, owner):
+        self._logger = logging.getLogger(f"{__name__}-{backend}-{token}")
+
+        self.backend = backend
+        self.token = token
+        self.status = status
+        self.owner = owner
+
+        self._display = None
+        self._audioModuleIndex = None
+        self._participant = None
+        self._process = None
+        self._fileName = None
+
+    def __del__(self):
+        self._stopHelpers()
+
+    def start(self):
+        """
+        Starts the recording.
+
+        This method blocks until the recording ends.
+
+        :raise Exception: if the recording ends unexpectedly (including if it
+               could not be started).
+        """
+
+        width = config.getBackendVideoWidth(self.backend)
+        height = config.getBackendVideoHeight(self.backend)
+
+        directory = config.getBackendDirectory(self.backend).rstrip('/')
+
+        sanitizedBackend = ''.join([character for character in self.backend if character.isalnum()])
+
+        fullDirectory = f'{directory}/{sanitizedBackend}/{self.token}'
+
+        try:
+            # Ensure that PulseAudio is running.
+            # A "long" timeout is used to prevent it from exiting before the
+            # call was joined.
+            subprocess.run(['pulseaudio', '--start', '--exit-idle-time=120'], check=True)
+
+            # Ensure that the directory to start the recordings exists.
+            os.makedirs(fullDirectory, exist_ok=True)
+
+            self._display = Display(size=(width, height), manage_global_env=False)
+            self._display.start()
+
+            # Start new audio sink for the audio output of the browser.
+            self._audioModuleIndex, audioSinkIndex = newAudioSink(sanitizedBackend, self.token)
+            audioSinkIndex = str(audioSinkIndex)
+
+            env = self._display.env()
+            env['PULSE_SINK'] = audioSinkIndex
+
+            self._logger.debug("Starting participant")
+            self._participant = Participant('firefox', self.backend, width, height, env, self._logger)
+
+            self._logger.debug("Joining call")
+            self._participant.joinCall(self.token)
+
+            extensionlessFileName = f'{fullDirectory}/recording-{datetime.now().strftime("%Y%m%d-%H%M%S")}'
+
+            recorderArgs = getRecorderArgs(self.status, self._display.new_display_var, audioSinkIndex, width, height, extensionlessFileName)
+
+            self._fileName = recorderArgs[-1]
+
+            self._logger.debug("Starting recorder")
+            self._process = subprocess.Popen(recorderArgs, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, text=True)
+
+            # Log recorder output.
+            Thread(target=recorderLog, args=[self.backend, self.token, self._process.stdout], daemon=True).start()
+
+            returnCode = self._process.wait()
+
+            # recorder process will be explicitly terminated when needed, which
+            # returns with 255; any other return code means that it ended
+            # without an expected reason.
+            if returnCode != 255:
+                raise Exception("recorder ended unexpectedly")
+        except Exception as exception:
+            self._stopHelpers()
+
+            raise
+
+    def stop(self):
+        """
+        Stops the recording and uploads it.
+
+        The recording is removed from the temporary directory once uploaded,
+        although it is kept if the upload fails.
+
+        :raise Exception: if the file could not be uploaded.
+        """
+
+        self._stopHelpers()
+
+        if not self._fileName:
+            self._logger.error(f"Recording stopping before starting, nothing to upload")
+
+            return
+
+        if not os.path.exists(self._fileName):
+            self._logger.error(f"Recording can not be uploaded, {self._fileName} does not exist")
+
+            return
+
+        BackendNotifier.uploadRecording(self.backend, self.token, self._fileName, self.owner)
+
+        os.remove(self._fileName)
+
+    def _stopHelpers(self):
+        if self._process:
+            self._logger.debug("Stopping recorder")
+            try:
+                self._process.terminate()
+                self._process.wait()
+            except:
+                self._logger.exception("Error when terminating recorder")
+            finally:
+                self._process = None
+
+        if self._participant:
+            self._logger.debug("Leaving call")
+            try:
+                self._participant.leaveCall()
+            except:
+                self._logger.exception("Error when leaving call")
+            finally:
+                self._participant = None
+
+        if self._audioModuleIndex:
+            self._logger.debug("Unloading audio module")
+            try:
+                with pulsectl.Pulse(f"audio-module-{self._audioModuleIndex}-unloader") as pacmd:
+                    pacmd.module_unload(self._audioModuleIndex)
+            except:
+                self._logger.exception("Error when unloading audio module")
+            finally:
+                self._audioModuleIndex = None
+
+        if self._display:
+            self._logger.debug("Stopping display")
+            try:
+                self._display.stop()
+            except:
+                self._logger.exception("Error when stopping display")
+            finally:
+                self._display = None

recording/src/nextcloud/talk/recording/__init__.py

@@ -0,0 +1,20 @@
+#
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+#
+
+__version__ = 0.1

recording/src/nextcloud/talk/recording/__main__.py

@@ -0,0 +1,38 @@
+#
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+#
+
+import argparse
+import logging
+
+from .Config import config
+from .Server import app
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-c", "--config", help="path to configuration file", default="server.conf")
+args = parser.parse_args()
+
+config.load(args.config)
+
+logging.basicConfig(level=config.getLogLevel())
+logging.getLogger('werkzeug').setLevel(config.getLogLevel())
+
+listen = config.getListen()
+host, port = listen.split(':')
+
+app.run(host, port, threaded=True)

recording/start-container.sh

@@ -0,0 +1,210 @@
+#!/usr/bin/env bash
+
+# @copyright Copyright (c) 2023, Daniel Calviño Sánchez (danxuliu@gmail.com)
+#
+# @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/>.
+
+# Helper script to run the recording backend for Nextcloud Talk.
+#
+# The recording backend is implemented in several Python files. This Bash script
+# is provided to set up a Docker container with Selenium, a web browser and all
+# the needed Python dependencies for the recording backend.
+#
+# This script creates an Ubuntu container, installs all the needed dependencies
+# in it and executes the recording backend inside the container. If the
+# container exists already the previous container will be reused and this script
+# will simply execute the recording backend in it.
+#
+# Due to that the Docker container will not be stopped nor removed when the
+# script exits (except when the container was created but it could not be
+# started); that must be explicitly done once the container is no longer needed.
+#
+#
+#
+# DOCKER AND PERMISSIONS
+#
+# To perform its job, this script requires the "docker" command to be available.
+#
+# The Docker Command Line Interface (the "docker" command) requires special
+# permissions to talk to the Docker daemon, and those permissions are typically
+# available only to the root user. Please see the Docker documentation to find
+# out how to give access to a regular user to the Docker daemon:
+# https://docs.docker.com/engine/installation/linux/linux-postinstall/
+#
+# Note, however, that being able to communicate with the Docker daemon is the
+# same as being able to get root privileges for the system. Therefore, you must
+# give access to the Docker daemon (and thus run this script as) ONLY to trusted
+# and secure users:
+# https://docs.docker.com/engine/security/security/#docker-daemon-attack-surface
+
+# Sets the variables that abstract the differences in command names and options
+# between operating systems.
+#
+# Switches between timeout on GNU/Linux and gtimeout on macOS (same for mktemp
+# and gmktemp).
+function setOperatingSystemAbstractionVariables() {
+	case "$OSTYPE" in
+		darwin*)
+			if [ "$(which gtimeout)" == "" ]; then
+				echo "Please install coreutils (brew install coreutils)"
+				exit 1
+			fi
+
+			MKTEMP=gmktemp
+			TIMEOUT=gtimeout
+			DOCKER_OPTIONS="-e no_proxy=localhost "
+			;;
+		linux*)
+			MKTEMP=mktemp
+			TIMEOUT=timeout
+			DOCKER_OPTIONS=" "
+			;;
+		*)
+			echo "Operating system ($OSTYPE) not supported"
+			exit 1
+			;;
+	esac
+}
+
+# Removes Docker container if it was created but failed to start.
+function cleanUp() {
+	# Disable (yes, "+" disables) exiting immediately on errors to ensure that
+	# all the cleanup commands are executed (well, no errors should occur during
+	# the cleanup anyway, but just in case).
+	set +o errexit
+
+	# The name filter must be specified as "^/XXX$" to get an exact match; using
+	# just "XXX" would match every name that contained "XXX".
+	if [ -n "$(docker ps --all --quiet --filter status=created --filter name="^/$CONTAINER$")" ]; then
+		echo "Removing Docker container $CONTAINER"
+		docker rm --volumes --force $CONTAINER
+	fi
+}
+
+# Exit immediately on errors.
+set -o errexit
+
+# Execute cleanUp when the script exits, either normally or due to an error.
+trap cleanUp EXIT
+
+# Ensure working directory is script directory, as some actions (like copying
+# the files to the container) expect that.
+cd "$(dirname $0)"
+
+HELP="Usage: $(basename $0) [OPTION]...
+
+Options (all options can be omitted, but when present they must appear in the
+following order):
+--help prints this help and exits.
+--container CONTAINER_NAME the name to assign to the container. Defaults to
+  talk-recording.
+--time-zone TIME_ZONE the time zone to use inside the container. Defaults to
+  UTC. The recording backend can be started again later with a different time
+  zone (although other commands executed in the container with 'docker exec'
+  will still use the time zone specified during creation).
+--dev-shm-size SIZE the size to assign to /dev/shm in the Docker container.
+  Defaults to 2g"
+if [ "$1" = "--help" ]; then
+	echo "$HELP"
+
+	exit 0
+fi
+
+CONTAINER="talk-recording"
+if [ "$1" = "--container" ]; then
+	CONTAINER="$2"
+
+	shift 2
+fi
+
+if [ "$1" = "--time-zone" ]; then
+	TIME_ZONE="$2"
+
+	shift 2
+fi
+
+CUSTOM_CONTAINER_OPTIONS=false
+
+# 2g is the default value recommended in the documentation of the Docker images
+# for Selenium:
+# https://github.com/SeleniumHQ/docker-selenium#--shm-size2g
+DEV_SHM_SIZE="2g"
+if [ "$1" = "--dev-shm-size" ]; then
+	DEV_SHM_SIZE="$2"
+	CUSTOM_CONTAINER_OPTIONS=true
+
+	shift 2
+fi
+
+if [ -n "$1" ]; then
+	echo "Invalid option (or at invalid position): $1
+
+$HELP"
+
+	exit 1
+fi
+
+ENVIRONMENT_VARIABLES=""
+if [ -n "$TIME_ZONE" ]; then
+	ENVIRONMENT_VARIABLES="--env TZ=$TIME_ZONE"
+fi
+
+setOperatingSystemAbstractionVariables
+
+# If the container is not found a new one is prepared. Otherwise the existing
+# container is used.
+#
+# The name filter must be specified as "^/XXX$" to get an exact match; using
+# just "XXX" would match every name that contained "XXX".
+if [ -z "$(docker ps --all --quiet --filter name="^/$CONTAINER$")" ]; then
+	echo "Creating Talk recording container"
+	# In Ubuntu 22.04 and later Firefox is installed as a snap package, which
+	# does not work out of the box in a container. Therefore, for now Ubuntu
+	# 20.04 is used instead.
+	docker run --detach --tty --name=$CONTAINER --shm-size=$DEV_SHM_SIZE $ENVIRONMENT_VARIABLES $DOCKER_OPTIONS ubuntu:20.04 bash
+
+	echo "Installing required Python modules"
+	# "noninteractive" is used to provide default settings instead of asking for
+	# them (for example, for tzdata).
+	# Additional Python dependencies may be installed by pip if needed.
+	docker exec $CONTAINER bash -c "apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install --assume-yes ffmpeg firefox pulseaudio python3-pip xvfb"
+
+	echo "Adding user to run the recording backend"
+	docker exec $CONTAINER useradd --create-home recording
+
+	echo "Copying recording backend to the container"
+	docker exec $CONTAINER mkdir --parent /tmp/recording/
+	docker cp . $CONTAINER:/tmp/recording/
+
+	echo "Installing recording backend inside container"
+	docker exec $CONTAINER python3 -m pip install /tmp/recording/
+
+	echo "Copying configuration from server.conf.in to /etc/nextcloud-talk-recording/server.conf"
+	docker exec $CONTAINER mkdir --parent /etc/nextcloud-talk-recording/
+	docker cp server.conf.in $CONTAINER:/etc/nextcloud-talk-recording/server.conf
+elif $CUSTOM_CONTAINER_OPTIONS; then
+	# Environment variables are excluded from this warning.
+	echo "WARNING: Using existing container, custom container options ignored"
+fi
+
+# Start existing container if it is stopped.
+if [ -n "$(docker ps --all --quiet --filter status=exited --filter name="^/$CONTAINER$")" ]; then
+	echo "Starting Talk recording container"
+	docker start $CONTAINER
+fi
+
+echo "Starting recording backend"
+docker exec --tty --interactive --user recording $ENVIRONMENT_VARIABLES --workdir /home/recording $CONTAINER python3 -m nextcloud.talk.recording --config /etc/nextcloud-talk-recording/server.conf

src/components/AdminSettings/RecordingServer.vue

@@ -0,0 +1,204 @@
+<!--
+ - @copyright Copyright (c) 2019 Joas Schilling <coding@schilljs.com>
+ - @copyright Copyright (c) 2023 Daniel Calviño Sánchez <danxuliu@gmail.com>
+ -
+ - @author Joas Schilling <coding@schilljs.com>
+ -
+ - @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/>.
+ -
+ -->
+
+<template>
+	<div class="recording-server">
+		<input ref="recording_server"
+			type="text"
+			name="recording_server"
+			placeholder="https://recording.example.org"
+			:value="server"
+			:disabled="loading"
+			:aria-label="t('spreed', 'Recording backend URL')"
+			@input="updateServer">
+
+		<NcCheckboxRadioSwitch :checked="verify"
+			@update:checked="updateVerify">
+			{{ t('spreed', 'Validate SSL certificate') }}
+		</NcCheckboxRadioSwitch>
+
+		<NcButton v-show="!loading"
+			type="tertiary-no-background"
+			:aria-label="t('spreed', 'Delete this server')"
+			@click="removeServer">
+			<template #icon>
+				<Delete :size="20" />
+			</template>
+		</NcButton>
+
+		<div v-if="server">
+			<div class="testing-icon">
+				<NcLoadingIcon v-if="!checked" :size="20" />
+				<AlertCircle v-else-if="errorMessage" :size="20" :fill-color="'#E9322D'" />
+				<Check v-else :size="20" :fill-color="'#46BA61'" />
+			</div>
+			<div class="testing-label">
+				{{ connectionState }}
+			</div>
+		</div>
+	</div>
+</template>
+
+<script>
+import NcButton from '@nextcloud/vue/dist/Components/NcButton.js'
+import NcCheckboxRadioSwitch from '@nextcloud/vue/dist/Components/NcCheckboxRadioSwitch.js'
+import NcLoadingIcon from '@nextcloud/vue/dist/Components/NcLoadingIcon.js'
+import AlertCircle from 'vue-material-design-icons/AlertCircle.vue'
+import Check from 'vue-material-design-icons/Check.vue'
+import Delete from 'vue-material-design-icons/Delete.vue'
+import { getWelcomeMessage } from '../../services/recordingService.js'
+
+export default {
+	name: 'RecordingServer',
+
+	components: {
+		NcButton,
+		NcCheckboxRadioSwitch,
+		NcLoadingIcon,
+		AlertCircle,
+		Check,
+		Delete,
+	},
+
+	props: {
+		server: {
+			type: String,
+			default: '',
+			required: true,
+		},
+		verify: {
+			type: Boolean,
+			default: false,
+			required: true,
+		},
+		index: {
+			type: Number,
+			default: -1,
+			required: true,
+		},
+		loading: {
+			type: Boolean,
+			default: false,
+		},
+	},
+
+	data() {
+		return {
+			checked: false,
+			errorMessage: '',
+			versionFound: '',
+		}
+	},
+
+	computed: {
+		connectionState() {
+			if (!this.checked) {
+				return t('spreed', 'Status: Checking connection')
+			}
+			if (this.errorMessage) {
+				return this.errorMessage
+			}
+			return t('spreed', 'OK: Running version: {version}', {
+				version: this.versionFound,
+			})
+		},
+	},
+
+	watch: {
+		loading(isLoading) {
+			if (!isLoading) {
+				this.checkServerVersion()
+			}
+		},
+	},
+
+	mounted() {
+		if (this.server) {
+			this.checkServerVersion()
+		}
+	},
+
+	methods: {
+		removeServer() {
+			this.$emit('remove-server', this.index)
+		},
+		updateServer(event) {
+			this.$emit('update:server', event.target.value)
+		},
+		updateVerify(checked) {
+			this.$emit('update:verify', checked)
+		},
+
+		async checkServerVersion() {
+			this.checked = false
+
+			this.errorMessage = ''
+			this.versionFound = ''
+
+			try {
+				const response = await getWelcomeMessage(this.index)
+				this.checked = true
+				this.versionFound = response.data.ocs.data.version
+			} catch (exception) {
+				this.checked = true
+				if (exception.response.data.ocs.data.error === 'CAN_NOT_CONNECT') {
+					this.errorMessage = t('spreed', 'Error: Cannot connect to server')
+				} else if (exception.response.data.ocs.data.error === 'JSON_INVALID') {
+					this.errorMessage = t('spreed', 'Error: Server did not respond with proper JSON')
+				} else if (exception.response.data.ocs.data.error) {
+					this.errorMessage = t('spreed', 'Error: Server responded with: {error}', exception.response.data.ocs.data)
+				} else {
+					this.errorMessage = t('spreed', 'Error: Unknown error occurred')
+				}
+			}
+		},
+	},
+}
+</script>
+
+<style lang="scss" scoped>
+.recording-server {
+	height: 44px;
+	display: flex;
+	align-items: center;
+
+	label {
+		margin: 0 20px;
+		display: inline-block;
+	}
+
+	.testing-icon{
+		display: inline-block;
+		height: 20px;
+		line-height: 44px;
+		vertical-align: middle;
+	}
+
+	.testing-label {
+		display: inline-block;
+		height: 44px;
+		line-height: 44px;
+		vertical-align: middle;
+	}
+}
+</style>

src/components/AdminSettings/RecordingServers.vue

@@ -0,0 +1,164 @@
+<!--
+ - @copyright Copyright (c) 2019 Joas Schilling <coding@schilljs.com>
+ - @copyright Copyright (c) 2023 Daniel Calviño Sánchez <danxuliu@gmail.com>
+ -
+ - @author Joas Schilling <coding@schilljs.com>
+ -
+ - @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/>.
+ -
+ -->
+
+<template>
+	<div id="recording_server" class="videocalls section recording-server">
+		<h2>
+			{{ t('spreed', 'Recording backend') }}
+
+			<NcButton v-if="!loading && showAddServerButton"
+				class="recording-server__add-icon"
+				type="tertiary-no-background"
+				:aria-label="t('spreed', 'Add a new recording backend server')"
+				@click="newServer">
+				<template #icon>
+					<Plus :size="20" />
+				</template>
+			</NcButton>
+		</h2>
+
+		<ul class="recording-servers">
+			<transition-group name="fade" tag="li">
+				<RecordingServer v-for="(server, index) in servers"
+					:key="`server${index}`"
+					:server.sync="servers[index].server"
+					:verify.sync="servers[index].verify"
+					:index="index"
+					:loading="loading"
+					@remove-server="removeServer"
+					@update:server="debounceUpdateServers"
+					@update:verify="debounceUpdateServers" />
+			</transition-group>
+		</ul>
+
+		<div class="recording-secret">
+			<h4>{{ t('spreed', 'Shared secret') }}</h4>
+			<input v-model="secret"
+				type="text"
+				name="recording_secret"
+				:disabled="loading"
+				:placeholder="t('spreed', 'Shared secret')"
+				:aria-label="t('spreed', 'Shared secret')"
+				@input="debounceUpdateServers">
+		</div>
+	</div>
+</template>
+
+<script>
+import RecordingServer from '../../components/AdminSettings/RecordingServer.vue'
+import NcButton from '@nextcloud/vue/dist/Components/NcButton.js'
+import Plus from 'vue-material-design-icons/Plus.vue'
+import { showSuccess } from '@nextcloud/dialogs'
+import { loadState } from '@nextcloud/initial-state'
+import debounce from 'debounce'
+
+export default {
+	name: 'RecordingServers',
+
+	components: {
+		NcButton,
+		Plus,
+		RecordingServer,
+	},
+
+	data() {
+		return {
+			servers: [],
+			secret: '',
+			loading: false,
+			saved: false,
+		}
+	},
+
+	computed: {
+		showAddServerButton() {
+			return this.servers.length === 0
+		},
+	},
+
+	beforeMount() {
+		const state = loadState('spreed', 'recording_servers')
+		this.servers = state.servers
+		this.secret = state.secret
+	},
+
+	methods: {
+		removeServer(index) {
+			this.servers.splice(index, 1)
+			this.debounceUpdateServers()
+		},
+
+		newServer() {
+			this.servers.push({
+				server: '',
+				verify: false,
+			})
+		},
+
+		debounceUpdateServers: debounce(function() {
+			this.updateServers()
+		}, 1000),
+
+		async updateServers() {
+			this.loading = true
+
+			this.servers = this.servers.filter(server => server.server.trim() !== '')
+
+			const self = this
+			OCP.AppConfig.setValue('spreed', 'recording_servers', JSON.stringify({
+				servers: this.servers,
+				secret: this.secret,
+			}), {
+				success() {
+					showSuccess(t('spreed', 'Recording backend settings saved'))
+					self.loading = false
+					self.toggleSave()
+				},
+			})
+		},
+
+		toggleSave() {
+			this.saved = true
+			setTimeout(() => {
+				this.saved = false
+			}, 3000)
+		},
+	},
+}
+</script>
+
+<style lang="scss" scoped>
+@import '../../assets/variables';
+
+.recording-server {
+	h2 {
+		height: 44px;
+		display: flex;
+		align-items: center;
+	}
+}
+
+.recording-secret {
+	margin-top: 20px;
+}
+</style>

src/components/AdminSettings/SignalingServers.vue

@@ -56,7 +56,7 @@
 			</NcCheckboxRadioSwitch>
 		</div>
 
-		<ul class="turn-servers">
+		<ul class="signaling-servers">
 			<transition-group name="fade" tag="li">
 				<SignalingServer v-for="(server, index) in servers"
 					:key="`server${index}`"

src/components/TopBar/TopBarMenu.vue

@@ -364,7 +364,7 @@ export default {
 
 		canModerateRecording() {
 			const recordingEnabled = getCapabilities()?.spreed?.config?.call?.recording || false
-			return this.canModerate && recordingEnabled
+			return this.canFullModerate && recordingEnabled
 		},
 
 		isRecording() {

src/init.js

@@ -63,3 +63,7 @@ EventBus.$on('signaling-join-room', (payload) => {
 	const token = payload[0]
 	store.dispatch('updateLastJoinedConversationToken', token)
 })
+
+EventBus.$on('signaling-recording-status-changed', (token, status) => {
+	store.dispatch('setConversationProperties', { token, properties: { callRecording: status } })
+})

src/services/recordingService.js

@@ -23,6 +23,16 @@
 import axios from '@nextcloud/axios'
 import { generateOcsUrl } from '@nextcloud/router'
 
+/**
+ * Get welcome message from the recording server
+ *
+ * @param {number} serverId the index in the list of configured recording
+ *        servers
+ */
+const getWelcomeMessage = async (serverId) => {
+	return axios.get(generateOcsUrl('apps/spreed/api/v1/recording/welcome/{serverId}', { serverId }))
+}
+
 /**
  * Start call recording
  *
@@ -46,6 +56,7 @@ const stopCallRecording = async (token) => {
 }
 
 export {
+	getWelcomeMessage,
 	startCallRecording,
 	stopCallRecording,
 }

src/utils/signaling.js

@@ -1281,7 +1281,7 @@ Signaling.Standalone.prototype.processRoomEvent = function(data) {
 		})
 		break
 	case 'message':
-		this.processRoomMessageEvent(data.event.message.data)
+		this.processRoomMessageEvent(data.event.message.roomid, data.event.message.data)
 		break
 	default:
 		console.error('Unknown room event', data)
@@ -1289,12 +1289,15 @@ Signaling.Standalone.prototype.processRoomEvent = function(data) {
 	}
 }
 
-Signaling.Standalone.prototype.processRoomMessageEvent = function(data) {
+Signaling.Standalone.prototype.processRoomMessageEvent = function(token, data) {
 	switch (data.type) {
 	case 'chat':
 		// FIXME this is not listened to
 		EventBus.$emit('should-refresh-chat-messages')
 		break
+	case 'recording':
+		EventBus.$emit('signaling-recording-status-changed', token, data.recording.status)
+		break
 	default:
 		console.error('Unknown room message event', data)
 	}

src/views/AdminSettings.vue

@@ -31,6 +31,7 @@
 		<TurnServers />
 		<SignalingServers />
 		<HostedSignalingServer />
+		<RecordingServers />
 		<SIPBridge />
 	</div>
 </template>
@@ -41,6 +42,7 @@ import Commands from '../components/AdminSettings/Commands.vue'
 import GeneralSettings from '../components/AdminSettings/GeneralSettings.vue'
 import HostedSignalingServer from '../components/AdminSettings/HostedSignalingServer.vue'
 import MatterbridgeIntegration from '../components/AdminSettings/MatterbridgeIntegration.vue'
+import RecordingServers from '../components/AdminSettings/RecordingServers.vue'
 import SignalingServers from '../components/AdminSettings/SignalingServers.vue'
 import SIPBridge from '../components/AdminSettings/SIPBridge.vue'
 import StunServers from '../components/AdminSettings/StunServers.vue'
@@ -56,6 +58,7 @@ export default {
 		GeneralSettings,
 		HostedSignalingServer,
 		MatterbridgeIntegration,
+		RecordingServers,
 		SignalingServers,
 		SIPBridge,
 		StunServers,

tests/integration/features/bootstrap/FakeRecordingServer.php

@@ -0,0 +1,79 @@
+<?php
+/**
+ * @copyright Copyright (c) 2023 Daniel Calviño Sánchez <danxuliu@gmail.com>
+ *
+ * @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/>.
+ *
+ */
+
+$receivedRequestsFile = sys_get_temp_dir() . '/fake-nextcloud-talk-recording-requests';
+
+if (preg_match('/\/api\/v1\/welcome/', $_SERVER['REQUEST_URI'])) {
+	echo json_encode(['version' => '0.1-fake']);
+} elseif (preg_match('/\/api\/v1\/room\/([^\/]+)/', $_SERVER['REQUEST_URI'], $matches)) {
+	if (empty($_SERVER['HTTP_TALK_RECORDING_RANDOM'])) {
+		error_log('fake-recording-server: Missing Talk-Recording-Random header');
+
+		header('HTTP/1.0 403 Forbidden');
+
+		return;
+	}
+
+	if (empty($_SERVER['HTTP_TALK_RECORDING_CHECKSUM'])) {
+		error_log('fake-recording-server: Missing Talk-Recording-Checksum header');
+
+		header('HTTP/1.0 403 Forbidden');
+
+		return;
+	}
+
+	$random = $_SERVER['HTTP_TALK_RECORDING_RANDOM'];
+	$checksum = $_SERVER['HTTP_TALK_RECORDING_CHECKSUM'];
+
+	$data = file_get_contents('php://input');
+
+	$hash = hash_hmac('sha256', $random . $data, 'the secret');
+	if (!hash_equals($hash, strtolower($checksum))) {
+		error_log('fake-recording-server: Checksum does not match');
+
+		header('HTTP/1.0 403 Forbidden');
+
+		return;
+	}
+
+	$receivedRequests = [];
+	if (file_exists($receivedRequestsFile)) {
+		$receivedRequests = json_decode(file_get_contents($receivedRequestsFile));
+	}
+	$receivedRequests[] = [
+		'token' => $matches[1],
+		'data' => $data,
+	];
+	file_put_contents($receivedRequestsFile, json_encode($receivedRequests));
+} elseif (preg_match('/requests/', $_SERVER['REQUEST_URI'])) {
+	if (!file_exists($receivedRequestsFile)) {
+		return;
+	}
+
+	$requests = file_get_contents($receivedRequestsFile);
+
+	// Previous received requests are cleared.
+	unlink($receivedRequestsFile);
+
+	echo $requests;
+} else {
+	header('HTTP/1.0 404 Not Found');
+}

tests/integration/features/bootstrap/FeatureContext.php

@@ -116,6 +116,7 @@ class FeatureContext implements Context, SnippetAcceptingContext {
 	private $guestsOldWhitelist;
 
 	use CommandLineTrait;
+	use RecordingTrait;
 
 	public static function getTokenForIdentifier(string $identifier) {
 		return self::$identifierToToken[$identifier];
@@ -3223,13 +3224,13 @@ class FeatureContext implements Context, SnippetAcceptingContext {
 	public function userStoreRecordingFileInRoom(string $user, string $file, string $identifier, int $statusCode, string $apiVersion = 'v1'): void {
 		$this->setCurrentUser($user);
 
-		$sipBridgeSharedSecret = 'the secret';
-		$this->setAppConfig('spreed', new TableNode([['sip_bridge_shared_secret', $sipBridgeSharedSecret]]));
+		$recordingServerSharedSecret = 'the secret';
+		$this->setAppConfig('spreed', new TableNode([['recording_servers', json_encode(['secret' => $recordingServerSharedSecret])]]));
 		$validRandom = md5((string) rand());
-		$validChecksum = hash_hmac('sha256', $validRandom . self::$identifierToToken[$identifier], $sipBridgeSharedSecret);
+		$validChecksum = hash_hmac('sha256', $validRandom . self::$identifierToToken[$identifier], $recordingServerSharedSecret);
 		$headers = [
-			'TALK_SIPBRIDGE_RANDOM' => $validRandom,
-			'TALK_SIPBRIDGE_CHECKSUM' => $validChecksum,
+			'TALK_RECORDING_RANDOM' => $validRandom,
+			'TALK_RECORDING_CHECKSUM' => $validChecksum,
 		];
 		$options = [
 			'multipart' => [

tests/integration/features/bootstrap/RecordingTrait.php

@@ -0,0 +1,100 @@
+<?php
+/**
+ * @copyright Copyright (c) 2023 Daniel Calviño Sánchez <danxuliu@gmail.com>
+ *
+ * @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/>.
+ *
+ */
+use Behat\Gherkin\Node\TableNode;
+use GuzzleHttp\Client;
+use PHPUnit\Framework\Assert;
+
+// setAppConfig() method is expected to be available in the class that uses this
+// trait.
+trait RecordingTrait {
+	/** @var string */
+	private $recordingServerPid = '';
+
+	/** @var string */
+	private $recordingServerAddress = 'localhost:9000';
+
+	/**
+	 * @Given /^recording server is started$/
+	 */
+	public function recordingServerIsStarted() {
+		if ($this->recordingServerPid !== '') {
+			return;
+		}
+
+		// "the secret" is hardcoded in the fake recording server.
+		$this->setAppConfig('spreed', new TableNode([['recording_servers', json_encode(['servers' => [['server' => 'http://127.0.0.1:9000']], 'secret' => 'the secret'])]]));
+
+		$this->recordingServerPid = exec('php -S ' . $this->recordingServerAddress . ' features/bootstrap/FakeRecordingServer.php >/dev/null & echo $!');
+	}
+
+	/**
+	 * @AfterScenario
+	 *
+	 * @When /^recording server is stopped$/
+	 */
+	public function recordingServerIsStopped() {
+		if ($this->recordingServerPid === '') {
+			return;
+		}
+
+		// Get received requests to clear them.
+		$this->getRecordingServerReceivedRequests();
+
+		exec('kill ' . $this->recordingServerPid);
+
+		$this->recordingServerPid = '';
+	}
+
+	/**
+	 * @Then /^recording server received the following requests$/
+	 */
+	public function recordingServerReceivedTheFollowingRequests(TableNode $formData = null) {
+		$requests = $this->getRecordingServerReceivedRequests();
+
+		if ($formData === null) {
+			Assert::assertEmpty($requests);
+			return;
+		}
+
+		if ($requests === null) {
+			Assert::fail('No received requests');
+			return;
+		}
+
+		$expected = array_map(static function (array $request) {
+			$request['token'] = FeatureContext::getTokenForIdentifier($request['token']);
+			return $request;
+		}, $formData->getHash());
+
+		$count = count($expected);
+		Assert::assertCount($count, $requests, 'Request count does not match');
+
+		Assert::assertEquals($expected, $requests);
+	}
+
+	private function getRecordingServerReceivedRequests() {
+		$url = 'http://' . $this->recordingServerAddress . '/requests';
+		$client = new Client();
+		$response = $client->get($url);
+
+		return json_decode($response->getBody()->getContents(), true);
+	}
+}

tests/integration/features/callapi/recording.feature

@@ -4,15 +4,19 @@ Feature: callapi/recording
     Given user "participant2" exists
 
   Scenario: Start and stop video recording
-    When the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
       | roomName | room1 |
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
-    And user "participant1" starts "video" recording in room "room1" with 200 (v1)
-    Then user "participant1" sees the following system messages in room "room1" with 200 (v1)
+    When user "participant1" starts "video" recording in room "room1" with 200 (v1)
+    Then recording server received the following requests
+      | token | data                                                         |
+      | room1 | {"type":"start","start":{"status":1,"owner":"participant1"}} |
+    And user "participant1" sees the following system messages in room "room1" with 200 (v1)
       | room  | actorType | actorId      | actorDisplayName         | systemMessage        |
       | room1 | users     | participant1 | participant1-displayname | recording_started    |
       | room1 | users     | participant1 | participant1-displayname | call_started         |
@@ -21,7 +25,10 @@ Feature: callapi/recording
       | type | name  | callRecording |
       | 2    | room1 | 1             |
     When user "participant1" stops recording in room "room1" with 200 (v1)
-    Then user "participant1" sees the following system messages in room "room1" with 200 (v1)
+    Then recording server received the following requests
+      | token | data             |
+      | room1 | {"type":"stop"} |
+    And user "participant1" sees the following system messages in room "room1" with 200 (v1)
       | room  | actorType | actorId      | actorDisplayName         | systemMessage        |
       | room1 | users     | participant1 | participant1-displayname | recording_stopped    |
       | room1 | users     | participant1 | participant1-displayname | recording_started    |
@@ -32,15 +39,19 @@ Feature: callapi/recording
       | 2    | room1 | 0             |
 
   Scenario: Start and stop audio recording
-    When the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
       | roomName | room1 |
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
-    And user "participant1" starts "audio" recording in room "room1" with 200 (v1)
-    Then user "participant1" sees the following system messages in room "room1" with 200 (v1)
+    When user "participant1" starts "audio" recording in room "room1" with 200 (v1)
+    Then recording server received the following requests
+      | token | data                                                         |
+      | room1 | {"type":"start","start":{"status":2,"owner":"participant1"}} |
+    And user "participant1" sees the following system messages in room "room1" with 200 (v1)
       | room  | actorType | actorId      | actorDisplayName         | systemMessage           |
       | room1 | users     | participant1 | participant1-displayname | audio_recording_started |
       | room1 | users     | participant1 | participant1-displayname | call_started            |
@@ -49,7 +60,10 @@ Feature: callapi/recording
       | type | name  | callRecording |
       | 2    | room1 | 2             |
     When user "participant1" stops recording in room "room1" with 200 (v1)
-    Then user "participant1" sees the following system messages in room "room1" with 200 (v1)
+    Then recording server received the following requests
+      | token | data             |
+      | room1 | {"type":"stop"} |
+    And user "participant1" sees the following system messages in room "room1" with 200 (v1)
       | room  | actorType | actorId      | actorDisplayName         | systemMessage           |
       | room1 | users     | participant1 | participant1-displayname | audio_recording_stopped |
       | room1 | users     | participant1 | participant1-displayname | audio_recording_started |
@@ -60,7 +74,8 @@ Feature: callapi/recording
       | 2    | room1 | 0             |
 
   Scenario: Get error when start|stop recording and already did this
-    Given the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
@@ -68,91 +83,114 @@ Feature: callapi/recording
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
     When user "participant1" starts "audio" recording in room "room1" with 200 (v1)
-    Then user "participant1" starts "audio" recording in room "room1" with 400 (v1)
-    And the response error matches with "recording"
+    And recording server received the following requests
+      | token | data                                                         |
+      | room1 | {"type":"start","start":{"status":2,"owner":"participant1"}} |
+    And user "participant1" starts "audio" recording in room "room1" with 400 (v1)
+    Then the response error matches with "recording"
+    And recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 2             |
     When user "participant1" stops recording in room "room1" with 200 (v1)
-    Then user "participant1" stops recording in room "room1" with 200 (v1)
+    And recording server received the following requests
+      | token | data             |
+      | room1 | {"type":"stop"} |
+    And user "participant1" stops recording in room "room1" with 200 (v1)
+    Then recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
     When user "participant1" starts "video" recording in room "room1" with 200 (v1)
-    Then user "participant1" starts "video" recording in room "room1" with 400 (v1)
-    And the response error matches with "recording"
+    And recording server received the following requests
+      | token | data                                                         |
+      | room1 | {"type":"start","start":{"status":1,"owner":"participant1"}} |
+    And user "participant1" starts "video" recording in room "room1" with 400 (v1)
+    Then the response error matches with "recording"
+    And recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 1             |
     When user "participant1" stops recording in room "room1" with 200 (v1)
-    Then user "participant1" stops recording in room "room1" with 200 (v1)
+    And recording server received the following requests
+      | token | data             |
+      | room1 | {"type":"stop"} |
+    And user "participant1" stops recording in room "room1" with 200 (v1)
+    Then recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
 
   Scenario: Get error when try to start recording with invalid status
-    When the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
       | roomName | room1 |
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
-    Then user "participant1" starts "invalid" recording in room "room1" with 400 (v1)
-    And the response error matches with "status"
+    When user "participant1" starts "invalid" recording in room "room1" with 400 (v1)
+    Then the response error matches with "status"
+    And recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
 
   Scenario: Manager try without success to start recording when signaling is internal
-    When the following "spreed" app config is set
+    Given the following "spreed" app config is set
       | signaling_dev | no |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
       | roomName | room1 |
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
-    Then user "participant1" starts "video" recording in room "room1" with 400 (v1)
-    And the response error matches with "config"
+    When user "participant1" starts "video" recording in room "room1" with 400 (v1)
+    Then the response error matches with "config"
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
-    And user "participant1" starts "audio" recording in room "room1" with 400 (v1)
-    And the response error matches with "config"
+    When user "participant1" starts "audio" recording in room "room1" with 400 (v1)
+    Then the response error matches with "config"
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
 
   Scenario: Get error when non moderator/owner try to start recording
-    Given the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
       | roomName | room1 |
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
-    When user "participant1" adds user "participant2" to room "room1" with 200 (v4)
+    And user "participant1" adds user "participant2" to room "room1" with 200 (v4)
     And user "participant2" joins room "room1" with 200 (v4)
     And user "participant2" joins call "room1" with 200 (v4)
-    Then user "participant2" starts "video" recording in room "room1" with 403 (v1)
+    When user "participant2" starts "video" recording in room "room1" with 403 (v1)
     And user "participant2" starts "audio" recording in room "room1" with 403 (v1)
+    Then recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
 
   Scenario: Get error when try to start recording and no call started
-    Given the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
       | roomName | room1 |
-    Then user "participant1" starts "video" recording in room "room1" with 400 (v1)
-    And the response error matches with "call"
+    When user "participant1" starts "video" recording in room "room1" with 400 (v1)
+    Then the response error matches with "call"
+    And recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
-    Then user "participant1" starts "audio" recording in room "room1" with 400 (v1)
-    And the response error matches with "call"
+    When user "participant1" starts "audio" recording in room "room1" with 400 (v1)
+    Then the response error matches with "call"
+    And recording server received the following requests
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
@@ -162,8 +200,8 @@ Feature: callapi/recording
       | roomType | 2 |
       | roomName | room1 |
     And user "participant1" joins room "room1" with 200 (v4)
-    Then user "participant1" store recording file "/img/join_call.ogg" in room "room1" with 200 (v1)
-    And user "participant1" has the following notifications
+    When user "participant1" store recording file "/img/join_call.ogg" in room "room1" with 200 (v1)
+    Then user "participant1" has the following notifications
       | app    | object_type | object_id | subject                                        |
       | spreed | chat        | room1     | Recording for the call in room1 was uploaded.  |
     And user "participant1" is participant of the following unordered rooms (v4)
@@ -171,7 +209,8 @@ Feature: callapi/recording
       | 2    | room1 | 0             |
 
   Scenario: Stop recording automatically when end the call
-    When the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
@@ -179,16 +218,23 @@ Feature: callapi/recording
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
     And user "participant1" starts "audio" recording in room "room1" with 200 (v1)
+    And recording server received the following requests
+      | token | data                                                         |
+      | room1 | {"type":"start","start":{"status":2,"owner":"participant1"}} |
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 2             |
-    Then user "participant1" ends call "room1" with 200 (v4)
+    When user "participant1" ends call "room1" with 200 (v4)
+    Then recording server received the following requests
+      | token | data             |
+      | room1 | {"type":"stop"} |
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |
 
   Scenario: Stop recording automatically when the last participant go out
-    When the following "spreed" app config is set
+    Given recording server is started
+    And the following "spreed" app config is set
       | signaling_dev | yes |
     And user "participant1" creates room "room1" (v4)
       | roomType | 2 |
@@ -196,10 +242,16 @@ Feature: callapi/recording
     And user "participant1" joins room "room1" with 200 (v4)
     And user "participant1" joins call "room1" with 200 (v4)
     And user "participant1" starts "audio" recording in room "room1" with 200 (v1)
+    And recording server received the following requests
+      | token | data                                                         |
+      | room1 | {"type":"start","start":{"status":2,"owner":"participant1"}} |
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 2             |
-    Then user "participant1" leaves room "room1" with 200 (v4)
+    When user "participant1" leaves room "room1" with 200 (v4)
+    Then recording server received the following requests
+      | token | data             |
+      | room1 | {"type":"stop"} |
     And user "participant1" is participant of the following unordered rooms (v4)
       | type | name  | callRecording |
       | 2    | room1 | 0             |

tests/php/Recording/BackendNotifierTest.php

@@ -0,0 +1,207 @@
+<?php
+/**
+ *
+ * @copyright Copyright (c) 2018 Joachim Bauch <bauch@struktur.de>
+ * @copyright Copyright (c) 2023 Daniel Calviño Sánchez <danxuliu@gmail.com>
+ *
+ * @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\Talk\Tests\php\Recording;
+
+use OCA\Talk\Chat\CommentsManager;
+use OCA\Talk\Config;
+use OCA\Talk\Manager;
+use OCA\Talk\Model\AttendeeMapper;
+use OCA\Talk\Model\SessionMapper;
+use OCA\Talk\Recording\BackendNotifier;
+use OCA\Talk\Room;
+use OCA\Talk\Service\ParticipantService;
+use OCA\Talk\TalkSession;
+use OCP\App\IAppManager;
+use OCP\AppFramework\Utility\ITimeFactory;
+use OCP\EventDispatcher\IEventDispatcher;
+use OCP\Http\Client\IClientService;
+use OCP\IGroupManager;
+use OCP\IL10N;
+use OCP\IURLGenerator;
+use OCP\IUserManager;
+use OCP\Security\IHasher;
+use OCP\Security\ISecureRandom;
+use PHPUnit\Framework\MockObject\MockObject;
+use Psr\Log\LoggerInterface;
+use Test\TestCase;
+
+class CustomBackendNotifier extends BackendNotifier {
+	private array $requests = [];
+
+	public function getRequests(): array {
+		return $this->requests;
+	}
+
+	public function clearRequests() {
+		$this->requests = [];
+	}
+
+	protected function doRequest(string $url, array $params, int $retries = 3): void {
+		$this->requests[] = [
+			'url' => $url,
+			'params' => $params,
+		];
+	}
+}
+
+/**
+ * @group DB
+ */
+class BackendNotifierTest extends TestCase {
+	private ?Config $config = null;
+	private ?ISecureRandom $secureRandom = null;
+	/** @var IURLGenerator|MockObject */
+	private $urlGenerator;
+	private ?\OCA\Talk\Tests\php\Recording\CustomBackendNotifier $backendNotifier = null;
+
+	private ?Manager $manager = null;
+
+	private ?string $recordingSecret = null;
+	private ?string $baseUrl = null;
+
+	public function setUp(): void {
+		parent::setUp();
+
+		$config = \OC::$server->getConfig();
+		$this->recordingSecret = 'the-recording-secret';
+		$this->baseUrl = 'https://localhost/recording';
+		$config->setAppValue('spreed', 'recording_servers', json_encode([
+			'secret' => $this->recordingSecret,
+			'servers' => [
+				[
+					'server' => $this->baseUrl,
+				],
+			],
+		]));
+
+		$this->secureRandom = \OC::$server->getSecureRandom();
+		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+
+		$groupManager = $this->createMock(IGroupManager::class);
+		$userManager = $this->createMock(IUserManager::class);
+		$timeFactory = $this->createMock(ITimeFactory::class);
+		$dispatcher = \OC::$server->get(IEventDispatcher::class);
+
+		$this->config = new Config($config, $this->secureRandom, $groupManager, $userManager, $this->urlGenerator, $timeFactory, $dispatcher);
+
+		$this->recreateBackendNotifier();
+
+		$dbConnection = \OC::$server->getDatabaseConnection();
+		$this->manager = new Manager(
+			$dbConnection,
+			$config,
+			$this->config,
+			\OC::$server->get(IAppManager::class),
+			\OC::$server->get(AttendeeMapper::class),
+			\OC::$server->get(SessionMapper::class),
+			$this->createMock(ParticipantService::class),
+			$this->secureRandom,
+			$this->createMock(IUserManager::class),
+			$groupManager,
+			$this->createMock(CommentsManager::class),
+			$this->createMock(TalkSession::class),
+			$dispatcher,
+			$timeFactory,
+			$this->createMock(IHasher::class),
+			$this->createMock(IL10N::class)
+		);
+	}
+
+	public function tearDown(): void {
+		$config = \OC::$server->getConfig();
+		$config->deleteAppValue('spreed', 'recording_servers');
+		parent::tearDown();
+	}
+
+	private function recreateBackendNotifier() {
+		$this->backendNotifier = new CustomBackendNotifier(
+			$this->config,
+			$this->createMock(LoggerInterface::class),
+			$this->createMock(IClientService::class),
+			$this->secureRandom,
+			$this->urlGenerator,
+		);
+	}
+
+	private function calculateBackendChecksum($data, $random) {
+		if (empty($random) || strlen($random) < 32) {
+			return false;
+		}
+		return hash_hmac('sha256', $random . $data, $this->recordingSecret);
+	}
+
+	private function validateBackendRequest($expectedUrl, $request) {
+		$this->assertTrue(isset($request));
+		$this->assertEquals($expectedUrl, $request['url']);
+		$headers = $request['params']['headers'];
+		$this->assertEquals('application/json', $headers['Content-Type']);
+		$random = $headers['Talk-Recording-Random'];
+		$checksum = $headers['Talk-Recording-Checksum'];
+		$body = $request['params']['body'];
+		$this->assertEquals($this->calculateBackendChecksum($body, $random), $checksum);
+		return $body;
+	}
+
+	private function assertMessageWasSent(Room $room, array $message): void {
+		$expectedUrl = $this->baseUrl . '/api/v1/room/' . $room->getToken();
+
+		$requests = $this->backendNotifier->getRequests();
+		$requests = array_filter($requests, function ($request) use ($expectedUrl) {
+			return $request['url'] === $expectedUrl;
+		});
+		$bodies = array_map(function ($request) use ($expectedUrl) {
+			return json_decode($this->validateBackendRequest($expectedUrl, $request), true);
+		}, $requests);
+
+		$bodies = array_filter($bodies, function (array $body) use ($message) {
+			return $body['type'] === $message['type'];
+		});
+
+		$this->assertContainsEquals($message, $bodies, json_encode($bodies, JSON_PRETTY_PRINT));
+	}
+
+	public function testStart() {
+		$room = $this->manager->createRoom(Room::TYPE_PUBLIC);
+
+		$this->backendNotifier->start($room, Room::RECORDING_VIDEO, 'participant1');
+
+		$this->assertMessageWasSent($room, [
+			'type' => 'start',
+			'start' => [
+				'status' => Room::RECORDING_VIDEO,
+				'owner' => 'participant1',
+			],
+		]);
+	}
+
+	public function testStop() {
+		$room = $this->manager->createRoom(Room::TYPE_PUBLIC);
+
+		$this->backendNotifier->stop($room);
+
+		$this->assertMessageWasSent($room, [
+			'type' => 'stop',
+		]);
+	}
+}

tests/php/Service/RecordingServiceTest.php

@@ -38,6 +38,7 @@ namespace OCA\Talk\Tests\php\Service;
 use OCA\Talk\Chat\ChatManager;
 use OCA\Talk\Config;
 use OCA\Talk\Manager;
+use OCA\Talk\Recording\BackendNotifier;
 use OCA\Talk\Service\ParticipantService;
 use OCA\Talk\Service\RecordingService;
 use OCA\Talk\Service\RoomService;
@@ -73,6 +74,8 @@ class RecordingServiceTest extends TestCase {
 	private $chatManager;
 	/** @var LoggerInterface|MockObject */
 	private $logger;
+	/** @var BackendNotifier|MockObject */
+	private $backendNotifier;
 	/** @var RecordingService */
 	protected $recordingService;
 
@@ -90,6 +93,7 @@ class RecordingServiceTest extends TestCase {
 		$this->shareManager = $this->createMock(ShareManager::class);
 		$this->chatManager = $this->createMock(ChatManager::class);
 		$this->logger = $this->createMock(LoggerInterface::class);
+		$this->backendNotifier = $this->createMock(BackendNotifier::class);
 
 		$this->recordingService = new RecordingService(
 			$this->mimeTypeDetector,
@@ -103,6 +107,7 @@ class RecordingServiceTest extends TestCase {
 			$this->shareManager,
 			$this->chatManager,
 			$this->logger,
+			$this->backendNotifier,
 		);
 	}
 

tests/php/Signaling/BackendNotifierTest.php

@@ -190,7 +190,7 @@ class BackendNotifierTest extends TestCase {
 			$dbConnection,
 			$this->timeFactory,
 			$this->createMock(IManager::class),
-			$this->createMock(Config::class),
+			$this->config,
 			$this->createMock(IHasher::class),
 			$this->dispatcher,
 			$this->jobList
@@ -1469,4 +1469,21 @@ class BackendNotifierTest extends TestCase {
 			],
 		]);
 	}
+
+	public function testRecordingStatusChanged() {
+		$room = $this->manager->createRoom(Room::TYPE_PUBLIC);
+		$this->roomService->setCallRecording($room, Room::RECORDING_VIDEO);
+
+		$this->assertMessageWasSent($room, [
+			'type' => 'message',
+			'message' => [
+				'data' => [
+					'type' => 'recording',
+					'recording' => [
+						'status' => Room::RECORDING_VIDEO,
+					],
+				],
+			],
+		]);
+	}
 }

tests/stubs/GuzzleHttp_Exception_ConnectException.php

@@ -0,0 +1,6 @@
+<?php
+
+namespace GuzzleHttp\Exception;
+
+class ConnectException extends \RuntimeException {
+}

tests/stubs/GuzzleHttp_Exception_ServerException.php

@@ -0,0 +1,6 @@
+<?php
+
+namespace GuzzleHttp\Exception;
+
+class ServerException extends \RuntimeException {
+}