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HTTP headers query

  • So. I noticed that in wp-blog-header.php:
    @header(“Expires: Mon, 26 Jul 1997 05:00:00 GMT”); // Date in the past
    @header(“Last-Modified: ” . gmdate(“D, d M Y H:i:s”) . ” GMT”); // always modified
    @header(“Cache-Control: no-store, no-cache, must-revalidate”); // HTTP/1.1
    Don’t the above headers defeat the point of the nifty caching that HTTP allows?
    Why not set the Last-Modified header at least to be the actual date that the content was last updated? No point in making the user download a webpage again if it hasn’t been updated.

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