The HTTP 103 Early Hints information response may be sent by a server while it is still preparing a response, with hints about the resources that the server is expecting the final response will link. This allows a browser to start preloading resources even before the server has prepared and sent that final response.
I think the important part of that example is in the
link: "</test.css>; rel=preload; as=style",
link: "</test.css>; rel=preload; as=style",
header. that tells the browser to start loading that resource before the HTML is fully loaded (helpful if the HTML response is really long or is dynamically created)
Basically, a 103 is a CF-generated Response(that includes the assets a browser should preload), before you actually send a Response(HTML, usually). This is not a feature that Workers itself supports, so you have to enable it in the dash first.
I’m using a Cloudflare tunnel and the application thats using the tunnel is giving an ECONNRESET error. This seems to be due to the connection ending early. Has cloudflare implemented a limit for requests or something like that?