[Bug]: Filesystem.writeFile throws java.lang.ArrayIndexOutOfBoundsException when base64Data passed is empty

[braincomb]

Capacitor Version

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Latest Dependencies:

@capacitor/cli: 6.1.2
@capacitor/core: 6.1.2
@capacitor/android: 6.1.2
@capacitor/ios: 6.1.2

Installed Dependencies:

@capacitor/cli: 6.1.2
@capacitor/core: 6.1.2
@capacitor/android: 6.1.2
@capacitor/ios: 6.1.2

[error] Xcode is not installed
[success] Android looking great! 👌

Other API Details

No response

Platforms Affected

• iOS
• Android
• Web

Current Behavior

Relevant web layer code:

      const imageName = "image.jpg";
      const fileContent = await fetch(`/assets/${imageName}`);
      const blob = await fileContent.blob();
      const base64Data = (await convertBlobToBase64(blob)) as string;

      // Write the file to cache directory
      const savedFile = await Filesystem.writeFile({
        path: imageName,
        data: base64Data,
        directory: Directory.Cache,
      });

When file is found and it forms a proper base64Data, the application works as expected. However, when I mistyped the fetch path to /public/assets/${imageName}, the file was not found and therefore base64Data formed was empty like so: data:image/jpeg;base64,, this causes Filesystem.writeFile to crash the application:

23:01:27.588 E Unable to open asset URL: http://localhost/public/assets/image.jpg
23:01:27.611 V To native (Capacitor plugin): callbackId: 109817524, pluginId: Filesystem, methodName: writeFile
23:01:27.611 V callback: 109817524, pluginId: Filesystem, methodName: writeFile, methodData: {"path":"image.jpg","data":"data:image/jpeg;base64,","directory":"CACHE"}
23:01:27.612 E Serious error executing plugin
java.lang.reflect.InvocationTargetException
at java.lang.reflect.Method.invoke(Native Method)
at com.getcapacitor.PluginHandle.invoke(PluginHandle.java:138)
at com.getcapacitor.Bridge.lambda$callPluginMethod$0(Bridge.java:821)

Full stacktrace attached:
stacktrace.txt

Expected Behavior

When base64Data passed is empty, I expect the application to not crash and simply return and propagate the error to the web layer.

Project Reproduction

N/A

Additional Information

No response

[ionitron-bot]

This issue needs more information before it can be addressed. In particular, the reporter needs to provide a minimal sample app that demonstrates the issue. If no sample app is provided within 15 days, the issue will be closed.
Please see the Contributing Guide for how to create a Sample App.
Thanks! Ionitron 💙

[Ionitron]

It looks like this issue didn't get the information it needed, so I'll close it for now. If I made a mistake, sorry! I am just a bot.

Have a great day!
Ionitron 💙

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Capacitor, please create a new issue and ensure the template is fully filled out.