ZOO compressed archive
application/x-zoo
Magic Bytes
Offset: 20
FD C4 A7 DC
The ZOO compressed archive is a legacy file format developed by Rahul Dhesi in the late 1980s for data compression and archiving. Originally popular on Unix and early MS-DOS systems, it was primarily utilized for distributing software and managing long-term storage of multiple files within a single container. While largely superseded by modern formats like ZIP and RAR, the format included technical features such as file versioning and embedded comment fields.
Validation Code
How to validate .zoo files in Python
Python
def is_zoo(file_path: str) -> bool:
"""
Check if file is a valid ZOO by magic bytes.
Signature offset: 20 bytes
"""
signature = bytes([0xFD, 0xC4, 0xA7, 0xDC])
with open(file_path, "rb") as f:
f.seek(20)
return f.read(4) == signatureHow to validate .zoo files in Node.js
Node.js
function isZOO(buffer: Buffer): boolean {
// Signature offset: 20 bytes
const signature = Buffer.from([0xFD, 0xC4, 0xA7, 0xDC]);
if (buffer.length < 24) return false;
return buffer.subarray(20, 24).equals(signature);
}
Go
func IsZOO(data []byte) bool {
// Signature offset: 20 bytes
signature := []byte{0xFD, 0xC4, 0xA7, 0xDC}
if len(data) < 24 {
return false
}
return bytes.Equal(data[20:24], signature)
}API Endpoint
GET
/api/v1/zoo
curl https://filesignature.org/api/v1/zoo