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API design & gRPC

REST best practices, protobuf, API versioning, and backward-compatible service contracts.

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API design & gRPC easy

How to Validate a JWT Signature in Python with a Mock Secret

Validates a JWT's signature using a mock secret, decoding and handling expired or invalid tokens gracefully.

jwt authentication security
Python 
import jwt
import time

SECRET = "mock_secret_key_123"

def validate_token(token):
    try:
        payload = jwt.decode(token, SECRET, algorithms=["HS256"])
        return f"Valid token. Payload: {payload}"
    except jwt.ExpiredSignatureError:
        return "Token expired"
    except jwt.InvalidTokenError:
        …
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