if-modified-since vs if-none-match
Regarding the differences between Last-Modified/If-Modified-Since and ETag/If-None-Match: Both can be used interchangeably. However depending on the type of resource, and how it is generated on the server, one or the other question (“has this been modified since …?”https://stackoverflow.com/”does this still match this ETag?”) may be easier to answer. Examples: If you’re serving files, using the … Read more