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up.protocol X-Up-Evict-Cache
HTTP header

The server may send this optional response header to control which previously cached responses should be evicted after this response.

The value of this header is a URL pattern matching responses that should be evicted.

For example, to expire all responses to URLs starting with /notes/:

X-Up-Evict-Cache: /notes/*

To evict all cache entries:

X-Up-Evict-Cache: *