httpConn.contentType must not be null error when download file

[uzair-ird]

Descri java.lang.NullPointerException: getContentType(...) must not be null
W/System.err( 7202): at vn.hunghd.flutterdownloader.DownloadWorker.downloadFile(DownloadWorker.kt:343)
W/System.err( 7202): at vn.hunghd.flutterdownloader.DownloadWorker.doWork(DownloadWorker.kt:206)
W/System.err( 7202): at androidx.work.Worker$1.run(Worker.java:82)
W/System.err( 7202): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
W/System.err( 7202): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
W/System.err( 7202): at java.lang.Thread.run(Thread.java:1012)
I/WM-WorkerWrapper( 7202): Worker result FAILURE for Work [ id=fc17e316-6f48-48ae-9c4d-80293d740396, tags={ vn.hunghd.flutterdownloader.DownloadWorker, flutter_download_task } ]be the bug

To Reproduce

Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior

Screenshots

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Device information:

• Device: [e.g. iPhone 13]
• OS: [e.g. iOS 15.4]
• plugin version [e.g. v1.8.0]

Additional context

[uzair-ird]

I am using flutter_downloader: ^1.11.5 this version

[bartekpacia]

should be resolved by #966