Getting Base65 String Instead of Number[] - Backend->Frontend

[KiddoV]

I have a function defined in Go:

func (a *App) GetFileContent() (fileDat []byte, err error) {
	if filePath, err := runtime.OpenFileDialog(a.ctx, runtime.OpenDialogOptions{Title: "Please choose a file..."}); err != nil {
		return nil, err
	} else {
		fileDat, err = os.ReadFile(filePath)
		return fileDat, err
	}

}

In TS I would call the function

import { GetFileContent } from '../../wailsjs/go/main/App';

const getFileContent = () => {
        GetFileContent().then(file => {
            console.log(file);
        }).catch(err => {
            console.log(err);
        })
}

App.d.ts

export function GetFileContent():Promise<Array<number>>;

...but my TS functiongetFileContent() would return base64 (string) in the console.

This make the export function in App.d.ts unrealizable, since it would return a different type (type Promise<string> instead of type Promise<Array<number>>) as how it was automatically defined in wailsjs folder.

How do I resolve this mistype issue?
Thanks!

[leaanthony]

The short answer is because Go Marshalls []byte as a base64 encoded string when using JSON. If you're loading a file, a custom AssetHandler might be better?

[KiddoV]

I've never done custom AssetHandler. Can you give some code examples?

[leaanthony]

https://wails.io/docs/guides/dynamic-assets

[KiddoV]

Not what I intended to do, but thanks!