Converter (File to Base64 String)

main();
function main(){
//// == Config Retrieving / 工程コンフィグの参照 ==
const dataId_file         = configs.get( "conf_file" );
const dataId_base64String = configs.get( "conf_base64String" );

//// == 演算 / Calculating ==
const files = engine.findDataByNumber( dataId_file );
let text = "";

if (files.size() != 1) {
  throw `File count invalid.`;
}

const file = files.get(0);

if (file.getLength() > 10485760) {
  throw `File size over.`;
}

fileRepository.readFile(file, 3145728, function(bytes) {
  text += base64.encodeToString(bytes);
});

engine.setDataByNumber( dataId_base64String, text );

}