HTC
text/plain
Magic Bytes
Offset: 0
54 68 69 73 20 69 73 20 54 65 58 2C
The HTC file format, as defined by this signature, represents a text-based artifact generated by the TeX typesetting system created by Donald Knuth. These files typically serve as processing transcripts or identification headers, recording the initialization banner of the engine during document compilation. While this extension matches legacy Internet Explorer components, files matching this plain text signature are harmless logs used primarily for verifying software versions and debugging typesetting errors.
Validation Code
How to validate .htc files in Python
Python
def is_htc(file_path: str) -> bool:
"""Check if file is a valid HTC by magic bytes."""
signature = bytes([0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C])
with open(file_path, "rb") as f:
return f.read(12) == signatureHow to validate .htc files in Node.js
Node.js
function isHTC(buffer: Buffer): boolean {
const signature = Buffer.from([0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C]);
return buffer.subarray(0, 12).equals(signature);
}
Go
func IsHTC(data []byte) bool {
signature := []byte{0x54, 0x68, 0x69, 0x73, 0x20, 0x69, 0x73, 0x20, 0x54, 0x65, 0x58, 0x2C}
if len(data) < 12 {
return false
}
return bytes.Equal(data[:12], signature)
}API Endpoint
GET
/api/v1/htc
curl https://filesignature.org/api/v1/htc