Function validate_jwt_format

src/core/dto/validator/jwt_token.py:6–20

(v: str)

def validate_jwt_format(v: str) -> str:
    jwt_pattern = r"^[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+\.[A-Za-z0-9_-]+$"

    if not re.match(jwt_pattern, v):
        raise ValueError("Invalid JWT format. Expected format: header.payload.signature")

    parts = v.split(".")
    if len(parts) != 3:
        raise ValueError("JWT must have exactly 3 parts separated by dots")

    for i, part in enumerate(parts):
        if not part:
            raise ValueError(f"JWT part {i + 1} is empty")

    return v


JWTToken = Annotated[str, BeforeValidator(validate_jwt_format)]