Fairplay implementation in Swift, AVAssetResourceDelegate - ios

Question

I watched Apple FairPlay introduction videos, I read a this code:
https://gist.github.com/fousa/5709fb7c84e5b53dbdae508c9cb4fadc
And I also went through HLS Catalog from apple and with the last the problem is that I need only playing DRM videos without any downloading and all this stuff so I started from GitHub example.
I have a certificate, videos in FairPlay and the key server module.
My first and main problem is that AVResourceDelegate isn't calling when I'm giving AVURLAsset with video url. I read at stack that I need to change scheme to sth else, e.g "DRM" from https and right AVResourceDelegate calling then but I don't have .m3u8 file because video link is wrong!
Could you please guys/girls help me.
import Foundation
import AVKit
import NotificationCenter
public struct DRMVideoData{
var drmKey: String?
var proxyFairPlay: String
var fileFairPlay: String
var idVideo: String
}
class VODDRMImplementation: NSObject, AVAssetResourceLoaderDelegate {
let domain = "DRMDelegate.ContentKeyQueue"
let contentKeyDelegateQueue = DispatchQueue(label: "DRMDelegate.ContentKeyQueue")
var drmData: DRMVideoData?
func startPlayerWithDRM(_ videoDRM: DRMVideoData,_ player: AVPlayer?,_ playerLayer: AVPlayerLayer?, c: #escaping (AVPlayer?, AVPlayerLayer?) -> Void) {
var urlcomp = URLComponents(string: videoDRM.fileFairPlay)
urlcomp?.scheme = "drm"
if let url = try? urlcomp?.asURL(){
self.drmData = videoDRM
let url = url
let asset = AVURLAsset(url: url!)
asset.resourceLoader.setDelegate(self, queue: self.contentKeyDelegateQueue)
let playerItem = AVPlayerItem(asset: asset)
let player = AVPlayer(playerItem: playerItem)
let playerLayer = AVPlayerLayer(player: player)
player.pause()
c(player, playerLayer)
}else{
c(nil, nil)
}
}
func resourceLoader(_ resourceLoader: AVAssetResourceLoader, shouldWaitForLoadingOfRequestedResource loadingRequest: AVAssetResourceLoadingRequest) -> Bool {
log.debug("DRM: started")
// getting data for KSM server
guard let urlToConvert = loadingRequest.request.url,
let drmData = drmData else {
log.debug("DRM: unable to read URL from loadingRequest")
loadingRequest.finishLoading(with: NSError(domain: domain, code: -1, userInfo: nil))
return false
}
do{
log.debug("DRM: video link \(urlToVideo)")
guard let certificateData = getCertificateFromServer() else {
log.debug("DRM: false to get public certificate")
loadingRequest.finishLoading(with: NSError(domain: domain, code: -3, userInfo: nil))
return false
}
let contentId = drmData.idVideo // content id
guard let contentIdData = contentId.data(using: String.Encoding.utf8),
let spcData = try? loadingRequest.streamingContentKeyRequestData(forApp: certificateData, contentIdentifier: contentIdData, options: nil),
let dataRequest = loadingRequest.dataRequest else {
loadingRequest.finishLoading(with: NSError(domain: domain, code: -3, userInfo: nil))
log.debug("DRM: false to get SPC Data from video")
return false
}
let ksmServer = URL(string: drmData.proxyFairPlay)! // KSM link
var request = URLRequest(url: ksmServer)
request.httpMethod = "GET"
request.httpBody = spcData
let session = URLSession(configuration: .default)
let task = session.dataTask(with: request) { data, response, error in
guard let data = data else {
log.debug("DRM: unable to fetch ckc key :/")
loadingRequest.finishLoading(with: NSError(domain: self.domain, code: -4, userInfo: nil))
return
}
dataRequest.respond(with: data)
loadingRequest.finishLoading()
}
task.resume()
}catch{
loadingRequest.finishLoading(with: NSError(domain: domain, code: -3, userInfo: nil))
log.debug("DRM: cannot generate url to video")
return false
}
return true
}
func takeURLFromId(_ videoLink: String) -> URL{
let urlString = videoLink
let url = URLComponents(string: urlString)
do{
let urlToReturn = try url?.asURL()
guard let urlToReturn2 = urlToReturn else {
let error = NSError(domain: domain, code: 0, userInfo: nil)
throw error }
return urlToReturn2
}catch{
if let url = NSURL(string: videoLink){
return url as URL
}else{
return NSURL(string: videoLink)! as URL
}
}
}
func getCertificateFromServer() -> Data?{
let filePath = Bundle.main.path(forResource: "privatekey", ofType: "pem")
guard let data = try? Data(contentsOf: URL(string: filePath!)!) else {
return nil
}
return data
}
}

Answer 1

You can try changing the line:
player.pause() to player.play()
Also I think keeping a reference to the player in your class should help, like so:
var player: AVPlayer?