JWT 调试器

import base64, json

def decode_jwt(token: str) -> dict:
    parts = token.split(".")
    if len(parts) != 3:
        raise ValueError("Invalid JWT format")
    
    def decode_part(part):
        # Add padding
        padded = part + "=" * (4 - len(part) % 4)
        decoded = base64.urlsafe_b64decode(padded)
        return json.loads(decoded)
    
    return {
        "header": decode_part(parts[0]),
        "payload": decode_part(parts[1]),
        "signature": parts[2],
    }

token = "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiJ1c2VyMSJ9.signature"
decoded = decode_jwt(token)
print(json.dumps(decoded["payload"], indent=2))