Minolta Raw Image

import magic
# Libmagic will reliably detect the '\x00MRM' signature
print(magic.from_file('vintage.mrw', mime=True)) # Outputs 'image/x-minolta-mrw'

const fs = require('fs');
// Manually detecting the 4-byte MRW magic signature
const buffer = Buffer.alloc(4);
const fd = fs.openSync('vintage.mrw', 'r');
fs.readSync(fd, buffer, 0, 4, 0);
fs.closeSync(fd);
const isMRW = buffer[0] === 0x00 && buffer[1] === 0x4D && buffer[2] === 0x52 && buffer[3] === 0x4D; // \x00, M, R, M
console.log('Is Minolta MRW:', isMRW);

import (
    "bytes"
    "net/http"
)
// Native Go HTTP detection will likely return application/octet-stream.
// Check directly for the explicit 4-byte signature:
// isMRW := bytes.HasPrefix(buf, []byte{0x00, 0x4D, 0x52, 0x4D})

$mime = mime_content_type('vintage.mrw');
echo $mime; // Standard PHP setups with updated magic definitions will return 'image/x-minolta-mrw'