This page returns an ETag header with the value
"3f6c554e000150f16a8abc4a3f0e368b".
On subsequent requests, if the crawler sends an
If-None-Match header matching this ETag, the server
will return a 304 Not Modified response instead of
the full page body.
Content: ProtocolProbe ETag test content v1
ETag: "3f6c554e000150f16a8abc4a3f0e368b"