PCO B16 Image

import magic
# Libmagic lacks definitions for the PCO B16 format and will output 'application/octet-stream'.
# A manual header check is required:
with open('scientific_capture.b16', 'rb') as f:
    is_pco = f.read(4) == b'PCO-'
    print('Is PCO B16:', is_pco)

const fs = require('fs');
// Manually detecting the 'PCO-' magic bytes
const buffer = Buffer.alloc(4);
const fd = fs.openSync('scientific_capture.b16', 'r');
fs.readSync(fd, buffer, 0, 4, 0);
fs.closeSync(fd);
const isPCO = buffer.toString('ascii') === 'PCO-';
console.log(isPCO);

import (
    "bytes"
    "net/http"
)
// http.DetectContentType will not recognize PCO B16. You must check the byte prefix directly.
// isPCO := bytes.HasPrefix(buf, []byte("PCO-"))

$mime = mime_content_type('scientific_capture.b16');
echo $mime; // Standard setups will resolve this to 'application/octet-stream' due to lack of magic byte mappings.