Palmpilot resource file
application/x-mobipocket-ebook
Magic Bytes
Offset: 0
42 4F 4F 4B 4D 4F 42 49
The Palm Pilot resource file is a database container format originally developed by Palm, Inc. for use on the Palm OS platform. These files primarily serve as electronic books for Mobipocket Reader and early versions of the Amazon Kindle, though they originally stored handheld applications and system data. Now considered a legacy format, it has been largely superseded by modern standards like EPUB, yet it remains a stable, low-risk container for static text and image content.
Validation Code
How to validate .prc files in Python
Python
def is_prc(file_path: str) -> bool:
"""Check if file is a valid PRC by magic bytes."""
signature = bytes([0x42, 0x4F, 0x4F, 0x4B, 0x4D, 0x4F, 0x42, 0x49])
with open(file_path, "rb") as f:
return f.read(8) == signatureHow to validate .prc files in Node.js
Node.js
function isPRC(buffer: Buffer): boolean {
const signature = Buffer.from([0x42, 0x4F, 0x4F, 0x4B, 0x4D, 0x4F, 0x42, 0x49]);
return buffer.subarray(0, 8).equals(signature);
}
Go
func IsPRC(data []byte) bool {
signature := []byte{0x42, 0x4F, 0x4F, 0x4B, 0x4D, 0x4F, 0x42, 0x49}
if len(data) < 8 {
return false
}
return bytes.Equal(data[:8], signature)
}API Endpoint
GET
/api/v1/prc
curl https://filesignature.org/api/v1/prc