How to identify file type by Base64 encoded string of a image
I have solved my problem with using mimeType = URLConnection.guessContentTypeFromStream(inputstream);
{ //Decode the Base64 encoded string into byte array
// tokenize the data since the 64 encoded data look like this "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAoAAAAKAC"
String delims="[,]";
String[] parts = base64ImageString.split(delims);
String imageString = parts[1];
byte[] imageByteArray = Base64.decode(imageString );
InputStream is = new ByteArrayInputStream(imageByteArray);
//Find out image type
String mimeType = null;
String fileExtension = null;
try {
mimeType = URLConnection.guessContentTypeFromStream(is); //mimeType is something like "image/jpeg"
String delimiter="[/]";
String[] tokens = mimeType.split(delimiter);
fileExtension = tokens[1];
} catch (IOException ioException){
}
}
if you want to get Mime type use this one
const body = {profilepic:"data:image/png;base64,abcdefghijklmnopqrstuvwxyz0123456789"};
let mimeType = body.profilepic.match(/[^:]\w+\/[\w-+\d.]+(?=;|,)/)[0];
online Demo here
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if you want to get only type of it like (png, jpg) etc
const body2 = {profilepic:"data:image/png;base64,abcdefghijklmnopqrstuvwxyz0123456789"};
let mimeType2 = body2.profilepic.match(/[^:/]\w+(?=;|,)/)[0];
online Demo here