HTTP headers

App Shielding uses the following HTTP headers to provide additional information when requesting an updated configuration:

• X-update-custom-id
  

  An optional, custom identifier set via the API in the app code. App Shielding attempts to store and persist this custom ID for any future update requests.

• If-Modified-Since
  

  The server’s previous Last-Modified response header. It is used for cache purposes and allows the server to simply reply with a 304 status code in case no change has happened on the server side.

An example request might look like the following:

GET /new_config.dat?dev=Samsung&mod=SM-G950F&pkg=com.example.myapp HTTP/1.1
Host: config-update.example.com
If-Modified-Since: Mon, 21 Jan 2019 12:00:00 GMT
X-update-custom-id: fb14234c73e0b9d8e68dc3932a3cfb3ce7982fdc