Entry#getData not work since from v2.6.24 on Android System WebView

[liuwin7]

Operation system: Android 10.0

Browser: Android system WebView 74 or 79

Description: After call the Entry.getData(), there is nothing callback.

  const data = await entry.getData!(new BlobWriter());

From the release notes, the transferStreams was introduced from v2.6.24, is that why?

[gildas-lormeau]

No errors are thrown?

[liuwin7]

Nothing at all on Android system WebView 74, but, Fetch failed will be thrown on the 79. I added the EntryDataOnprogressOptions, onstart \ onprogress \ onend, the callbacks will be called but there is no value from the callback function.

[gildas-lormeau]

Did you try to set the option transferStreams to false when calling Entry#getData()?

[liuwin7]

Yes, I have tried.

[liuwin7]

Hi, I forked the project and run the web test on the Android 10.0 emulator shipped with the Chrome v74. Many errors had been thrown.

Uncaught (in promise) TypeError: blob.arrayBuffer is not a function

According the Blob.arrayBuffer, the function arrayBuffer need the minimum version is 76.

Uncaught (in promise) TypeError: Object.hasOwn is not a function

According the Object.hasOwn function hasOwn needs 93+.

[gildas-lormeau]

You have to compile the code with babel. Compatibility with old browsers is outside the scope of the project.

[liuwin7]

Ok, this is indeed a compatibility issue, however, the incompatibility is not in the APIs blob.arrayBuffer Object.hasOwn above, but the WritableStream. WritableStream.close must be 81 and above, if it is lower than this version, WritableStream dose not work, the close function will not been called.

[gildas-lormeau]

It can be polyfilled, see https://www.npmjs.com/package/web-streams-polyfill. I tested it and it works fine. You will probably need to disable web workers support in zip.js to make it work though.

[liuwin7]

When disable web workers, an error will occur.

writable.close is not a function