I have a base64 string of a document from api. I want to know which extension/file format is that. Because if it is in jpg/jpeg/png i want to show it in image widget. Or if it is in pdf format i want to show it in PdfView widget. So is there any way to get file extension from base64. Is there any package for it?
If you have a base64 string you can detect file type by checking the first character of your base64 string:
'/' means jpeg.
'i' means png.
'R' means gif.
'U' means webp.
'J' means PDF.
I wrote a function for that:
String getBase64FileExtension(String base64String) {
switch (base64String.characters.first) {
case '/':
return 'jpeg';
case 'i':
return 'png';
case 'R':
return 'gif';
case 'U':
return 'webp';
case 'J':
return 'pdf';
default:
return 'unknown';
}
}