I have this customer which asked my a few ago to deliver an Android app for play stream videos. He had the links for the video and the url for the DRM License, which came in a object like this:

    "n": {
    "drm_license_url": "\thttps://sp-supplier.supplier.com/?deviceId=SoMeALphaNUmericakStuFF=",
    "drm_scheme": "widevine",
    "icon": "https://blogger.googleusercontent.com/img/some-logo.png",
    "name": "ANY NAME",
    "uri": "https://supplier-supplier-sl.supplier.com/live/c6eds/VIDEO/SA_Live_dash_enc_2A/SOMEVIDEO.mpd"
  },

I managed to succesful play the videos, after some reading of ExoPlayer library.

Now he wants to also play the same videos on a web, so after some reading I realized that I need to use dash.js or a similar MPD / m3u0 player, which also accept DRM license protection. I had read the documentation for make it, but the issue arised when, in order to pass the DRM license, I have to create this:

var protData = {
        "com.widevine.alpha": {
            "serverURL": "https://drm-widevine-licensing.axtest.net/AcquireLicense",
            "httpRequestHeaders": {
                "X-AxDRM-Message": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ2ZXJzaW9uIjoxLCJjb21fa2V5X2lkIjoiYjMzNjRlYjUtNTFmNi00YWUzLThjOTgtMzNjZWQ1ZTMxYzc4IiwibWVzc2FnZSI6eyJ0eXBlIjoiZW50aXRsZW1lbnRfbWVzc2FnZSIsImZpcnN0X3BsYXlfZXhwaXJhdGlvbiI6NjAsInBsYXlyZWFkeSI6eyJyZWFsX3RpbWVfZXhwaXJhdGlvbiI6dHJ1ZX0sImtleXMiOlt7ImlkIjoiOWViNDA1MGQtZTQ0Yi00ODAyLTkzMmUtMjdkNzUwODNlMjY2IiwiZW5jcnlwdGVkX2tleSI6ImxLM09qSExZVzI0Y3Iya3RSNzRmbnc9PSJ9XX19.FAbIiPxX8BHi9RwfzD7Yn-wugU19ghrkBFKsaCPrZmU"
            },
            priority: 0
        }

(Source: https://reference.dashif.org/dash.js/latest/samples/drm/widevine.html)

Now, I understand that I have to pass the same Licence URL in the key serverUrl, but about the header, I dont really know which value I must pass to the key X-AxDRM-Message because I does not have that, and neither the customer.

I tried using the pre-built players provided by dash for testing, in which you can choose your params, including DRM License, but Got the following error:

DRM: licenser error! --com.widevine.alpha update, XHR error. status is "" (0), readyState is 4

My questions are:

• Do I need further information from the DRM supplier in order to run same videos on web?
• There are any ways to create the protData object with the information that I already have?
• Can I do this or I´m using the wrong library?

Thanks! Matias