OpenTok Getting Started Sample App

A simple server that uses the OpenTok PHP SDK to create sessions, generate tokens for those sessions, archive (or record) sessions, and download those archives.

Quick deploy to Heroku

Heroku is a PaaS (Platform as a Service) that can be used to deploy simple and small applications for free. To easily deploy this repository to Heroku, sign up for a Heroku account and click this button:

Heroku will prompt you to add your OpenTok API key and OpenTok API secret, which you can obtain at the TokBox Dashboard.

Requirements

• Composer
• PHP 7.3 or higher

Installation & Running on localhost

1. Clone the app by running the command

    git clone [email protected]:opentok/learning-opentok-php.git
   

2. cd to the root directory.

3. Run composer install command to fetch and install all dependencies.

4. Next, copy the .env.dist file to .env and edit to add your API Key and Secret:

   TOKBOX_API_KEY=0000000
   TOKBOX_SECRET=abcdef1234567890abcdef01234567890abcdef
   

   Important: The archiving sample application uses archives that are stored in the OpenTok cloud. In your OpenTok Account page, ensure that the OpenTok project you use (corresponding to the API key and API secret you use here) is not set up to use cloud storage on Microsoft Azure or Amazon S3. However, in a production application, you will want to use an OpenTok project that has archive file cloud storage on Microsoft Azure or Amazon S3 enabled, since archives stored on the OpenTok cloud are only available for 72 hours.

5. Start the server using composer:

`$ composer run --timeout 0 serve`

6. Visit the URL http://localhost:3000/session in your browser. You should see a JSON response containing the OpenTok API key, session ID, and token.

Exploring the code

The web/index.php file contains setup and routing for the web service. The logic for each route is stored in src/Action/. The rest of this tutorial discusses code in these files.

In order to navigate clients to a designated meeting spot, we associate the Session ID to a room name which is easier for people to recognize and pass. For simplicity, we use a local file storage to implement the association where the room name is the file name and the Session ID is the contents. For production applications, you may want to configure a persistence (such as a database) to achieve this functionality.

Generate a Session and Token

The GET /room/:name route associates an OpenTok session with a "room" name. This route handles the passed room name and performs a check to determine whether the app should generate a new session ID or retrieve a session ID from the local file storage. Then, it generates an OpenTok token for that session ID. Once the API key, session ID, and token are ready, it sends a response with the body set to a JSON object containing the information.

$name = $args['name'];
// if a room name is already associated with a session ID
if ($this->storage->exists($name)) {
    // fetch the sessionId from local storage
    $sessionId = $this->storage[$name];

    // generate token
    $token = $this->opentok->generateToken($sessionId);
    $responseData = [
        'apiKey' => $this->apiKey,
        'sessionId' => $sessionId,
        'token'=>$token
    ];

    return new JsonResponse($responseData);
} else { // Generate a new session and store it off
    $session = $this->opentok->createSession([
        'mediaMode' => MediaMode::ROUTED
    ]);

    // store the sessionId into local
    $this->storage[$name] = $session->getSessionId();
    
    // generate token
    $token = $this->opentok->generateToken($session->getSessionId());
    $responseData = [
        'apiKey' => $this->apiKey,
        'sessionId' => $session->getSessionId(),
        'token'=>$token
    ];

    return new JsonResponse($responseData);
}

The GET /session route generates a convenient session for quick establishment of communication.

$parser = RouteContext::fromRequest($request)->getRouteParser();
return new RedirectResponse($parser->urlFor('room', ['name' => 'session']));

Start an Archive

A POST request to the /archive/start route starts an archive recording of an OpenTok session. The session ID OpenTok session is passed in as JSON data in the body of the request

// Start Archiving and return the Archive
$data = json_decode($request->getBody()->getContents(), true);
$sessionId = $data['sessionId'];
$archive = $this->opentok->startArchive($sessionId, 'Getting Started Sample Archive');

return new JsonResponse($archive->toJson());

You can only create an archive for sessions that have at least one client connected. Otherwise, the app will respond with an error.

Stop an Archive

A POST request to the /archive:archiveId/stop route stops an archive recording. The archive ID is returned by the call to the archive/start endpoint.

// Stop Archiving and return the Archive
$archive = $this->opentok->stopArchive($args['archiveId']);
return new JsonResponse($archive->toJson());

View an Archive

A GET request to '/archive/:archiveId/view' redirects the requested clients to a URL where the archive gets played.

// Download the archive
$archive = $this->opentok->getArchive($args['archiveId']);
if ($archive->status=='available') {
    return new RedirectResponse($archive->url);
}
else {
    return new HtmlResponse(file_get_contents($this->viewsDir . '/view.html'));
}

Get Archive information

A GET request to /archive/:archiveId returns a JSON object that contains all archive properties, including status, url, duration, etc. For more information, see here.

$archive = $this->opentok->getArchive($args['archiveId']);
return new JsonResponse($archive->toJson());

Fetch multiple Archives

A GET request to /archive with optional count and offset params returns a list of JSON archive objects. For more information, please check here.

Examples:

GET /archive // fetch up to 1000 archive objects
GET /archive?count=10  // fetch the first 10 archive objects
GET /archive?offset=10  // fetch archives but first 10 archive objetcs
GET /archive?count=10&offset=10 // fetch 10 archive objects starting from 11st

More information

This sample app does not provide client-side OpenTok functionality (for connecting to OpenTok sessions and for publishing and subscribing to streams). It is intended to be used with the OpenTok tutorials for Web, iOS, iOS-Swift, or Android:

• Web
• iOS
• iOS-Swift
• Android

Development and Contributing

Interested in contributing? We ❤️ pull requests! See the Contribution guidelines.

Getting Help

We love to hear from you so if you have questions, comments, or find a bug in the project, let us know! You can either:

• Open an issue on this repository
• See https://support.tokbox.com/ for support options
• Tweet at us! We're @VonageDev on Twitter
• Or join the Vonage Developer Community Slack

Further Reading

• Check out the Developer Documentation at https://tokbox.com/developer/