CODEWITHSUNDEEP
httpcachingbrowser-cache
Max Koretskyi
Max Koretskyi

Reputation: 105439

what value should cache-control header have to enable ETag\Last-Modified

What value should have cache-control header to enable ETag\Last-Modified? I want my resources files to be cached but never used without validation from server, i.e. browser should send If-none-match or If-modified-since header and receive 304 HTTP status code to use file from cache.

Upvotes: 2

Views: 227

Answers (1)

Tomas
Tomas

Reputation: 1694

The short answer is Cache-control: no-cache. Browser/caching proxy will have to always validate data before serving. For success validation ETag and Last-Modified headers must be present. Otherwise resource will be downloaded always fully from the server.

Upvotes: 2

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