NPE when download manifest with DashUtil.loadManifest

Hi Team! i want to download offline license key, ant then save it to local database. i created such helper-class

class LicenseDownloader @Inject constructor(
    private val context: Context
) {

    private val userAgent = Util.getUserAgent(context, "ua")
    private val drmSessionEventListener = object : DrmSessionEventListener.EventDispatcher() {}

    private val httpDataSourceFactory = DefaultHttpDataSource.Factory().setUserAgent(userAgent)
    private val dataSource = httpDataSourceFactory.createDataSource()

    suspend fun downloadLicense(
        manifestUrl: String,
        licenseUrl: String
    ): ByteArray {

        val offlineLicenseHelper = OfflineLicenseHelper
            .newWidevineInstance(licenseUrl, httpDataSourceFactory, drmSessionEventListener)

        return runCatching {
            withContext(Dispatchers.IO) {

                val dashManifest = DashUtil.loadManifest(
                    dataSource,
                    Uri.parse(manifestUrl)
                )

                val drmInitData =
                    DashUtil.loadFormatWithDrmInitData(dataSource, dashManifest.getPeriod(0))
                val license = offlineLicenseHelper.downloadLicense(drmInitData!!)

                license
            }
        }.also {

            offlineLicenseHelper.release()
        }.getOrElse {
            Timber.e(it.localizedMessage)

            ByteArray(0)
        }
    }
}

after start application, first call of licenseDownloader.downloadLicense(manifestUrl, licenseUrl) ends success, but second call throws NPE with message java.lang.NullPointerException: wrapped.getHeaderField(key) must not be null

W/System.err: java.lang.NullPointerException: wrapped.getHeaderField(key) must not be null
2022-02-16 03:41:57.229 14002-14162/com.xxxxxxxx W/System.err:     at com.android.tools.appinspection.network.httpurl.TrackedHttpURLConnection.getHeaderField(TrackedHttpURLConnection.kt:317)
2022-02-16 03:41:57.229 14002-14162/com.xxxxxxxx W/System.err:     at com.android.tools.appinspection.network.httpurl.HttpsURLConnectionWrapper.getHeaderField(HttpsURLConnectionWrapper.kt:182)
2022-02-16 03:41:57.229 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.upstream.DefaultHttpDataSource.isCompressed(DefaultHttpDataSource.java:774)
2022-02-16 03:41:57.229 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.upstream.DefaultHttpDataSource.open(DefaultHttpDataSource.java:405)
2022-02-16 03:41:57.229 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.upstream.StatsDataSource.open(StatsDataSource.java:84)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.upstream.DataSourceInputStream.checkOpened(DataSourceInputStream.java:101)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.upstream.DataSourceInputStream.open(DataSourceInputStream.java:64)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.upstream.ParsingLoadable.load(ParsingLoadable.java:177)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.upstream.ParsingLoadable.load(ParsingLoadable.java:69)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.google.android.exoplayer2.source.dash.DashUtil.loadManifest(DashUtil.java:75)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.xxxxxxxx.player.LicenseDownloader$downloadLicense$2.invokeSuspend(LicenseDownloader.kt:78)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.xxxxxxxx.player.LicenseDownloader$downloadLicense$2.invoke(Unknown Source:10)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndispatchedOrReturn(Undispatched.kt:89)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.BuildersKt__Builders_commonKt.withContext(Builders.common.kt:165)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.BuildersKt.withContext(Unknown Source:1)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.xxxxxxxx.player.LicenseDownloader.downloadLicense(LicenseDownloader.kt:74)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at com.xxxxxxxx.utils.DownloadHelper$updateAvailabilityStatus$$inlined$forEach$lambda$1$1.invokeSuspend(DownloadHelper.kt:127)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
2022-02-16 03:41:57.230 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
2022-02-16 03:41:57.231 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
2022-02-16 03:41:57.231 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
2022-02-16 03:41:57.231 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
2022-02-16 03:41:57.231 14002-14162/com.xxxxxxxx W/System.err:     at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)

Exception thrown in the line DashUtil.loadManifest.

what is the problem? help me please! i spend about 2 days, but does not find solution (((

Android 10 (Emulator and other devices) ExoPlayer v2.14.0

[icbaker]

This is a bug in Android Studio’s implementation of URLConnection: https://issuetracker.google.com/219572925

[schnaps1981]

@Kolyall that is no problem of exoplayer.

you can try to use okhttp datasource

1. you need import dependency "com.google.android.exoplayer:extension-okhttp:**xx.xx.xx (your exoplayer version)**"

2. then

val client = OkHttpClient.Builder().build()

val okhttpDataSourceFactory = OkHttpDataSource.Factory(okHttpClient)

val okHttpDataSource = okhttpDataSourceFactory.createDataSource()`

val drmInitData = DashUtil.loadFormatWithDrmInitData(okHttpDataSource, dashManifest.getPeriod(0))

it works fine for me