gistfile1.groovy

File file = new File("C:\\Users\\preslav\\DEsktop\\temp.jpg");

byte[] bytes = new byte[file.length()];
InputStream is = new FileInputStream(file);

int offset = 0;
int numRead = 0;
while (offset < bytes.length && (numRead=is.read(bytes, offset, bytes.length-offset)) >= 0)
{
   offset += numRead;
}

parameters.data = bytes;
parameters.filename = "temp.jpg";