Canon Raw Format

import magic
# Libmagic can identify CRW files by recognizing the CIFF 'HEAPCCDR' tail or standard headers
print(magic.from_file('archive.crw', mime=True)) # Outputs 'image/x-canon-crw'

const FileType = require('file-type');
const type = await FileType.fromFile('archive.crw');
console.log(type.mime); // Outputs 'image/x-canon-crw'

import (
    "bytes"
    "net/http"
)
// Native Go HTTP detection does not recognize CIFF natively. 
// You must implement a custom parser to locate 'HEAPCCDR' near the EOF or check the 'II\x1a' prefix.

$mime = mime_content_type('archive.crw');
echo $mime; // Resolves to 'image/x-canon-crw' on updated servers