shaka-player/docs/tutorials/fairplay.md

DASH/EME video player library

# FairPlay Support

We support FairPlay with EME on compatible environments or native `src=`.
Adding FairPlay support involves a bit more work than other key systems.

## Server certificate

All FairPlay content requires setting a server certificate. You can either
provide it directly or set a serverCertificateUri for Shaka to fetch it for
you.

```js
const req = await fetch('https://example.com/cert.der');
const cert = await req.arrayBuffer();

player.configure('drm.advanced.com\\.apple\\.fps\\.serverCertificate',
                 new Uint8Array(cert));
```

```js
player.configure('drm.advanced.com\\.apple\\.fps\\.serverCertificateUri',
                 'https://example.com/cert.der');
```

## License wrapping

Some FairPlay servers need to accept the license request in a different format
or give the response in a different format.  For more info, see the general
{@tutorial license-wrapping} tutorial:

```js
player.getNetworkingEngine().registerRequestFilter((type, request) => {
  if (type != shaka.net.NetworkingEngine.RequestType.LICENSE) {
    return;
  }

  const originalPayload = new Uint8Array(request.body);
  const base64Payload =
      shaka.util.Uint8ArrayUtils.toStandardBase64(originalPayload);
  const params = 'spc=' + base64Payload;
  request.headers['Content-Type'] = 'application/x-www-form-urlencoded';
  request.body = shaka.util.StringUtils.toUTF8(encodeURIComponent(params));
});

player.getNetworkingEngine().registerResponseFilter((type, response) => {
  if (type != shaka.net.NetworkingEngine.RequestType.LICENSE) {
    return;
  }

  let responseText = shaka.util.StringUtils.fromUTF8(response.data);
  // Trim whitespace.
  responseText = responseText.trim();

  // Look for <ckc> wrapper and remove it.
  if (responseText.substr(0, 5) === '<ckc>' &&
      responseText.substr(-6) === '</ckc>') {
    responseText = responseText.slice(5, -6);
  }

  // Decode the base64-encoded data into the format the browser expects.
  response.data = shaka.util.Uint8ArrayUtils.fromBase64(responseText).buffer;
});
```