Javatube shows a RegexMatchError when I try to download a video

[TechPro424]

You can use the tool: https://github.com/YunzheZJU/youtube-po-token-generator, to get the token
Enter with your visitorData: <data>
Enter with your PoToken: <token>
java.nio.file.NoSuchFileException: .cache\tokens.json
	at java.base/sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:85)
	at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:103)
	at java.base/sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:108)
	at java.base/sun.nio.fs.WindowsFileSystemProvider.newByteChannel(WindowsFileSystemProvider.java:234)
	at java.base/java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:482)
	at java.base/java.nio.file.Files.newOutputStream(Files.java:227)
	at java.base/java.nio.file.Files.write(Files.java:3492)
	at com.github.felipeucelli.javatube.InnerTube.cacheTokens(InnerTube.java:599)
	at com.github.felipeucelli.javatube.InnerTube.fetchPoToken(InnerTube.java:626)
	at com.github.felipeucelli.javatube.InnerTube.callApi(InnerTube.java:665)
	at com.github.felipeucelli.javatube.InnerTube.player(InnerTube.java:678)
	at com.github.felipeucelli.javatube.Youtube.callInnerTube(Youtube.java:217)
	at com.github.felipeucelli.javatube.Youtube.getVidInfo(Youtube.java:226)
	at com.github.felipeucelli.javatube.Youtube.checkAvailability(Youtube.java:265)
	at com.github.felipeucelli.javatube.Youtube.streamData(Youtube.java:339)
	at com.github.felipeucelli.javatube.Youtube.fmtStreams(Youtube.java:376)
	at com.github.felipeucelli.javatube.Youtube.streams(Youtube.java:493)
	at org.example.app.AppKt.main(App.kt:65)
	at org.example.app.AppKt$main$1.invokeSuspend(App.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.internal.ScopeCoroutine.afterResume(Scopes.kt:32)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:102)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at io.ktor.utils.io.internal.CancellableReusableContinuation.resumeWith(CancellableReusableContinuation.kt:93)
	at io.ktor.utils.io.ByteBufferChannel.resumeReadOp(ByteBufferChannel.kt:2104)
	at io.ktor.utils.io.ByteBufferChannel.tryTerminate$ktor_io(ByteBufferChannel.kt:390)
	at io.ktor.utils.io.ByteBufferChannel.close(ByteBufferChannel.kt:135)
	at io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:158)
	at io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:157)
	at kotlinx.coroutines.InvokeOnCompletion.invoke(JobSupport.kt:1385)
	at kotlinx.coroutines.JobSupport.notifyCompletion(JobSupport.kt:1497)
	at kotlinx.coroutines.JobSupport.completeStateFinalization(JobSupport.kt:325)
	at kotlinx.coroutines.JobSupport.finalizeFinishingState(JobSupport.kt:242)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:910)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:867)
	at kotlinx.coroutines.JobSupport.makeCompletingOnce$kotlinx_coroutines_core(JobSupport.kt:832)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:100)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:108)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:115)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:103)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:584)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:793)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:697)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:684)
Exception in thread "main" com.github.felipeucelli.javatube.exceptions.RegexMatchError: getThrottlingFunctionName: Could not find function name in playerJs: https://youtube.com/s/player/f3d47b5a/player_ias.vflset/en_US/base.js
	at com.github.felipeucelli.javatube.Cipher.getThrottlingFunctionName(Cipher.java:99)
	at com.github.felipeucelli.javatube.Cipher.<init>(Cipher.java:20)
	at com.github.felipeucelli.javatube.Youtube.applySignature(Youtube.java:393)
	at com.github.felipeucelli.javatube.Youtube.fmtStreams(Youtube.java:383)
	at com.github.felipeucelli.javatube.Youtube.streams(Youtube.java:493)
	at org.example.app.AppKt.main(App.kt:65)
	at org.example.app.AppKt$main$1.invokeSuspend(App.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.internal.ScopeCoroutine.afterResume(Scopes.kt:32)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:102)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at io.ktor.utils.io.internal.CancellableReusableContinuation.resumeWith(CancellableReusableContinuation.kt:93)
	at io.ktor.utils.io.ByteBufferChannel.resumeReadOp(ByteBufferChannel.kt:2104)
	at io.ktor.utils.io.ByteBufferChannel.tryTerminate$ktor_io(ByteBufferChannel.kt:390)
	at io.ktor.utils.io.ByteBufferChannel.close(ByteBufferChannel.kt:135)
	at io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:158)
	at io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:157)
	at kotlinx.coroutines.InvokeOnCompletion.invoke(JobSupport.kt:1385)
	at kotlinx.coroutines.JobSupport.notifyCompletion(JobSupport.kt:1497)
	at kotlinx.coroutines.JobSupport.completeStateFinalization(JobSupport.kt:325)
	at kotlinx.coroutines.JobSupport.finalizeFinishingState(JobSupport.kt:242)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:910)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:867)
	at kotlinx.coroutines.JobSupport.makeCompletingOnce$kotlinx_coroutines_core(JobSupport.kt:832)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:100)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:108)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:115)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:103)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:584)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:793)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:697)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:684)

Process finished with exit code 1

[felipeucelli]

Hi, sometimes YouTube updates and breaks some things, the fix is ​​already available here 34a92f0 it is also available in the latest version on jitpack.

[TechPro424]

Updated, now I get a FileNotFoundException

Exception in thread "main" java.io.FileNotFoundException: .\downloads\Dangal - Title Track   Lyrical Video   Dangal   Aamir Khan   Pritam   Amitabh B   Daler Mehndi.mp4 (The system cannot find the path specified)
	at java.base/java.io.FileOutputStream.open0(Native Method)
	at java.base/java.io.FileOutputStream.open(FileOutputStream.java:289)
	at java.base/java.io.FileOutputStream.<init>(FileOutputStream.java:230)
	at java.base/java.io.FileOutputStream.<init>(FileOutputStream.java:150)
	at com.github.felipeucelli.javatube.Stream.startDownload(Stream.java:215)
	at com.github.felipeucelli.javatube.Stream.download(Stream.java:178)
	at org.example.app.AppKt.main(App.kt:66)
	at org.example.app.AppKt$main$1.invokeSuspend(App.kt)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
	at kotlinx.coroutines.internal.ScopeCoroutine.afterResume(Scopes.kt:32)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:102)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at io.ktor.utils.io.internal.CancellableReusableContinuation.resumeWith(CancellableReusableContinuation.kt:93)
	at io.ktor.utils.io.ByteBufferChannel.resumeReadOp(ByteBufferChannel.kt:2104)
	at io.ktor.utils.io.ByteBufferChannel.tryTerminate$ktor_io(ByteBufferChannel.kt:390)
	at io.ktor.utils.io.ByteBufferChannel.close(ByteBufferChannel.kt:135)
	at io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:158)
	at io.ktor.utils.io.CoroutinesKt$launchChannel$1.invoke(Coroutines.kt:157)
	at kotlinx.coroutines.InvokeOnCompletion.invoke(JobSupport.kt:1385)
	at kotlinx.coroutines.JobSupport.notifyCompletion(JobSupport.kt:1497)
	at kotlinx.coroutines.JobSupport.completeStateFinalization(JobSupport.kt:325)
	at kotlinx.coroutines.JobSupport.finalizeFinishingState(JobSupport.kt:242)
	at kotlinx.coroutines.JobSupport.tryMakeCompletingSlowPath(JobSupport.kt:910)
	at kotlinx.coroutines.JobSupport.tryMakeCompleting(JobSupport.kt:867)
	at kotlinx.coroutines.JobSupport.makeCompletingOnce$kotlinx_coroutines_core(JobSupport.kt:832)
	at kotlinx.coroutines.AbstractCoroutine.resumeWith(AbstractCoroutine.kt:100)
	at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:46)
	at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:108)
	at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:115)
	at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:103)
	at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:584)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:793)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:697)
	at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:684)
	```

[TechPro424]

Turns out I had to create a folder called downloads in the program's working directory (I assumed the library would do it automatically, my bad)
this is my download statement: yt.streams().onlyAudio.download("./downloads/")

[TechPro424]

However, the allowCache property does not seem to work despite setting it to true (I'm asked to enter my visitorData and poToken for each download)

val yt = Youtube(firstresult, true, true)
yt.streams().onlyAudio.download("./downloads/")

This is my yt instance

[felipeucelli]

You are right, there was a path problem for the tokens.json file, that's why allowCache didn't work. Fixed in this commit e6ad187, now tokens.json is saved in the operating system's temporary folder, you can delete it using the Youtube.resetCache(); method or on Android just clear the app cache.

Thank you very much for reporting.