I have implemented the support for "If-Modified-Since" header in the
Registry.
Now the registry servlet adds the "Last-Modified" header to all resource
content responses.
Then the subsequent requests from clients (web browsers, APP client) may
include
the "If-Modified-Since" header with the last modified value of the
previous response.
If the date/time specified in the "If-Modified-Since" header is greater
than or equal to the last modified date/time of the resource,
Registry responds with a "304 Not Modified " response.
If a client does not support caching, it can simply avoid adding the
"If-Modified-Since" header, in which case
the resource content is always returned in the response.
Thanks,
Chathura
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