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Subject [Bug 59658] New: CacheIgnoreNoLastMod doc and code don't agree
Date Thu, 02 Jun 2016 17:49:11 GMT

            Bug ID: 59658
           Summary: CacheIgnoreNoLastMod doc and code don't agree
           Product: Apache httpd-2
           Version: 2.5-HEAD
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P2
         Component: Documentation

CacheIgnoreNoLastMod is supposed to ignore missing Last-Modified, but it only
has any effect when there is also no ETAG on the response.


Ordinarily, documents without a last-modified date are not cached. Under some
circumstances the last-modified date is removed (during mod_include processing
for example) or not provided at all. The CacheIgnoreNoLastMod directive
provides a way to specify that documents without last-modified dates should be
considered for caching, even without a last-modified date. If neither a
last-modified date nor an expiry date are provided with the document then the
value specified by the CacheDefaultExpire directive will be used to generate an
expiration date.

If the response has a status of 200 (OK), the response must also include at
least one of the "Etag", "Last-Modified" or the "Expires" headers, or the
max-age or s-maxage directive of the "Cache-Control:" header, unless the
CacheIgnoreNoLastMod directive has been used to require otherwise.

    else if (r->status == HTTP_OK && lastmods == NULL && etag == NULL &&
            == NULL) && (dconf->no_last_mod_ignore == 0) && !control.max_age
            && !control.s_maxage) {
        /* 200 OK response from HTTP/1.0 and up without Last-Modified,
         * Etag, Expires, Cache-Control:max-age, or Cache-Control:s-maxage
         * headers.
        /* Note: mod-include clears last_modified/expires/etags - this
         * is why we have an optional function for a key-gen ;-)
        reason = "No Last-Modified; Etag; Expires; Cache-Control:max-age or
Cache-Control:s-maxage headers";

Not really clear if this is a docs bug or not, but I lean towards doc.

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