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Custom `401 Unauthorized` error page, similar to builtin `404 Not Found`?

MMax11/26/2023
How can I create a custom error page that is rendered by middleware in Fresh? The middleware handles authentication for incoming requests and if a request fails authentication, the middleware should generate a 401 Unauthorized response that includes the body of the custom error page.
DAHDeno AI Helper11/26/2023
The documentation does not provide explicit information on creating a custom 401 Unauthorized error page. It does, however, provide information on creating custom 404 Not Found and 500 Internal Server Error pages. In the case of a 404 Not Found page, you would create a _404.tsx file in the routes/ folder with a default export that is a regular Preact component. The 404 page is invoked automatically when no route matches the URL. For a 500 Internal Server Error page, you would create a _500.tsx file in the routes/ folder with a default export that is a regular Preact component. This page is rendered automatically when an error is thrown in a route handler. However, the documentation does not specify a similar mechanism for a 401 Unauthorized error page. It might be possible to create a similar mechanism for a 401 Unauthorized error page, but without explicit support or examples in the documentation, I cannot provide a definitive answer. For handling authentication, the documentation does provide an example where a middleware checks the authentication status of a request and redirects the user if they are not authenticated. But this example does not include rendering a custom error page. I would recommend reaching out to the Fresh community or maintainers for more specific guidance on this topic. 🦕

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