Fix redirect channels

[B0pol]

• I carefully read the contribution guidelines and agree to them.
• I have tested the API against NewPipe.
• I agree to create a pull request for NewPipe as soon as possible to make it compatible with the changed API.

Leading to "Could not get channel id"

Exception

• User Action: requested channel
• Request: https://www.youtube.com/channel/UCITk7Ky4iE5_xISw9IaHqpQ
• Content Country: FR
• Content Language: fr-FR
• App Language: fr_FR
• Service: YouTube
• Version: 0.20.1
• OS: Linux Android 9 - 28

Crash log

org.schabi.newpipe.extractor.exceptions.ParsingException: Could not get channel id
	at org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeChannelExtractor.getId(YoutubeChannelExtractor.java:133)
	at org.schabi.newpipe.extractor.channel.ChannelInfo.getInfo(ChannelInfo.java:60)
	at org.schabi.newpipe.extractor.channel.ChannelInfo.getInfo(ChannelInfo.java:48)
	at org.schabi.newpipe.util.ExtractorHelper.lambda$getChannelInfo$4(ExtractorHelper.java:124)
	at org.schabi.newpipe.util.-$$Lambda$ExtractorHelper$u5W7VszTe8AoEexIsFM9huQfbkM.call(Unknown Source:4)
	at io.reactivex.internal.operators.single.SingleFromCallable.subscribeActual(SingleFromCallable.java:44)
	at io.reactivex.Single.subscribe(Single.java:3666)
	at io.reactivex.internal.operators.single.SingleDoOnSuccess.subscribeActual(SingleDoOnSuccess.java:35)
	at io.reactivex.Single.subscribe(Single.java:3666)
	at io.reactivex.internal.operators.maybe.MaybeFromSingle.subscribeActual(MaybeFromSingle.java:41)
	at io.reactivex.Maybe.subscribe(Maybe.java:4290)
	at io.reactivex.internal.operators.maybe.MaybeConcatArray$ConcatMaybeObserver.drain(MaybeConcatArray.java:153)
	at io.reactivex.internal.operators.maybe.MaybeConcatArray$ConcatMaybeObserver.request(MaybeConcatArray.java:78)
	at io.reactivex.internal.operators.flowable.FlowableElementAtMaybe$ElementAtSubscriber.onSubscribe(FlowableElementAtMaybe.java:66)
	at io.reactivex.internal.operators.maybe.MaybeConcatArray.subscribeActual(MaybeConcatArray.java:42)
	at io.reactivex.Flowable.subscribe(Flowable.java:14935)
	at io.reactivex.internal.operators.flowable.FlowableElementAtMaybe.subscribeActual(FlowableElementAtMaybe.java:36)
	at io.reactivex.Maybe.subscribe(Maybe.java:4290)
	at io.reactivex.internal.operators.maybe.MaybeToSingle.subscribeActual(MaybeToSingle.java:46)
	at io.reactivex.Single.subscribe(Single.java:3666)
	at io.reactivex.internal.operators.single.SingleSubscribeOn$SubscribeOnObserver.run(SingleSubscribeOn.java:89)
	at io.reactivex.Scheduler$DisposeTask.run(Scheduler.java:578)
	at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:66)
	at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:57)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:301)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:764)

---

it's being used in a test

[Stypox]

The WEB_PAGE_TYPE_CHANNEL part looks good, I tested it myself

[TobiGr]

why -1 and not ITEM_COUNT_UNKNOWN?

[Stypox]

That constant comes from ListExtractor, so it is not related to this, I was wrong when talking about it above

[B0pol]

so i should remove it?

[Stypox]

Well, nevermind, I'm ok with this, even though ITEM_ is misleading, but changing that would also require a PR to NewPipe. Thank you :-D

[cion49235]

Thank you always. I checked the app-debug.apk. When will the Source Code NewPipeExtractor be updated?

[Stypox]

@cion49235 the next NewPipe release will contain it