Request diagnostics

Values the browser can see about the current request. Useful for confirming which host answered, which path resolved, and whether TLS is in play.

Note: these values come from window.location and navigator in the browser — they reflect the requested host, not the backend that served the file. To stamp the actual origin machine name, use a server-side line (see the bottom of this page).

Requested host
Full URL
Path
Protocol
Port
Loaded at (client)
User agent
Referrer

Stamping the real origin on IIS

Rename this file to .aspx and add a line like the following to print the actual server that handled the request — useful when several origins sit behind one front door and you need to know which answered:

<%= Environment.MachineName %>  <%= Request.Url %>

Classic ASP equivalent: <%= Request.ServerVariables("SERVER_NAME") %>. Either way the server name is rendered at the origin, so it survives proxying and tells you the truth about routing.