Java EE (Java Enterprise Edition) General Discussion

I am writing an internet application. I recorded a session using wireshark. on the second http request in the series it uses a uri, somehow pulling it out of thin air. Here is the log of http traffic:

tcp ...
http GET (contains If-None-Matched header)
tcp...
http Response (contains ETag matching the If-None-Matched value as above)
tcp
http GET with URI = path (from unknown source)

The response ETag matching the If-None_Matched value seems to indicate that the resource was already cached. Where can I find information about where the unknown URI path of the second GET request is located?

I searched my temporary internet files with no luck.

Thanks