How to share custom text file types (IGC)?

Hi! Thanks for provide such a good library. I am using this lib to share my local or remote files. I can share files both Android and iOS. But in Android, I need to convert my files to base64. So far so good. But when I try to share my base64 coded file, lib adds different file extension to my file. Here is info about my files;

My files are flight record file that has to be .IGC extension (just string inside). I create my record like file_name.IGC. When I try to share it in Android;

Example 1

File Name: ‘2020-06-20-11-51-28-FNMN.IGC’ Converting to base 64 (data:text/plain)

await RNFS.readFile(fileURLToShare, 'base64').then(res => {
     fileURLToShare = `data:text/plain;base64,${res}`;
});

Share Options

Share.open({
        url: fileURLToShare,
        email: user.email,
        filename: fileName,
        showAppsToView: true,
        type: 'other',
        title: fileName,
})

Result:

Example 2

Converting to base 64 (data:text/igc)

await RNFS.readFile(fileURLToShare, 'base64').then(res => {
     fileURLToShare = `data:text/igc;base64,${res}`;
});

Result: Same above

Example 3

file_name: ‘2020-06-20-11-51-28-FNMN’ (I created record file without any extension to try) Converting to base 64 (data:text/plain)

await RNFS.readFile(fileURLToShare, 'base64').then(res => {
     fileURLToShare = `data:text/igc;base64,${res}`;
});

Result:

What should I do to share my record file with .igc extension? Thanks in advance

“react-native-share”: “3.3.2”, “react-native”: “0.61.4”,

[perfecten]

@enesozturk Thank you very much.

[perfecten]

I found a funy problem. the same file name can be share just once with a right extension. then the extension would be .null.

So I set the filename with HHMMSS，now the extension is ok.