HTTP Cookie Parser

from http.cookies import SimpleCookie
from datetime import datetime

def parse_set_cookie(header: str) -> dict:
    """Parse a Set-Cookie header string."""
    cookie = SimpleCookie()
    cookie.load(header)

    result = {}
    for name, morsel in cookie.items():
        result[name] = {
            "value": morsel.value,
            "path": morsel["path"] or "/",
            "domain": morsel["domain"],
            "expires": morsel["expires"],
            "max_age": morsel["max-age"],
            "secure": morsel["secure"],
            "httponly": morsel["httponly"],
            "samesite": morsel["samesite"],
        }
    return result

# Example
header = "session=abc123; Path=/; HttpOnly; Secure; SameSite=Strict; Max-Age=3600"
parsed = parse_set_cookie(header)
print(parsed)

# Build a cookie header
def build_set_cookie(name: str, value: str, **attrs) -> str:
    parts = [f"{name}={value}"]
    for k, v in attrs.items():
        if v is True:
            parts.append(k.replace('_', '-'))
        elif v:
            parts.append(f"{k.replace('_', '-')}={v}")
    return "; ".join(parts)

cookie = build_set_cookie("token", "xyz789",
    Path="/", Max_Age=3600, HttpOnly=True, Secure=True, SameSite="Lax")
print(cookie)