Using a webpage to display error messages

Other Hardware Displays
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I have built a headless unit using an ESP8266 to host a little webpage to control connected devices using the ESPAAsync Web Server, which works great and I have activated OTA updates which means I don't need to pull things apart to upload a new image. So I was wondering, how hard would it be to have a simple read-only webpage, hosted on the same webserver 192.168.1.1/error, which displayed debug info from printf type statements?

This thing runs at home and is out of range of anyone not inside my house so I am not tooworried about people trying to abuse it, but it would make debugging without dismantling possible.

Any ideas on how it could be done? I was thinking about some kind of buffer which then gets pulled into the webpage but my expertise isn't good enough to know if that is viable?

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may be you could print to a SPIFF / LittleFS file and when someone asks for 192.168.1.1/error, serve that file's content

GitHub - me-no-dev/ESPAsyncWebServer: Async Web Server for ESP8266 and ESP32 would make developing the server side pretty straightforward

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