已授权用户访问仅允许未授权用户访问页面时的HTTP状态码选择咨询

Let’s break down your questions with practical, widely accepted best practices:

1. Status code when an unauthorized user accesses a page restricted to unauthenticated users #

If the user is in the required unauthorized state and successfully loads the page, return 200 OK. This is the standard success response because the user is interacting with the resource exactly as intended (e.g., loading a login or signup page when they’re not logged in).

2. Status code when an authorized user tries to access an unauthorized-only page #

Returning 404 Not Found isn’t ideal—it’s misleading because the page does exist, the user just isn’t allowed to access it in their current state. Here are the better alternatives:

• 302 Found (or 303 See Other): Redirect the user to a relevant page they can access, like their dashboard, home page, or a "you’re already logged in" landing page. This is the most user-friendly approach, as it guides them to a useful destination instead of showing an error.
• 403 Forbidden: If you prefer not to redirect, this status code correctly signals that the user is authenticated but lacks permission to access the resource. Unlike 401 Unauthorized (which is for missing authentication), 403 explicitly means the server understands the request but refuses to fulfill it.

Avoid 404 because it can confuse users (who might think the link is broken) and mislead search engines about the existence of the resource.

内容的提问来源于stack exchange，提问作者Pan Wolodyjowsky