Hi,
While trying to use some of the new (and standard) functions of httpd
2.4.6, I stumbled over some errors where I need some help and which I’d
like to share and discuss.
First is the new possibility to work with IF/ELSE sections in the vhost
configs. While using some rewrite-rules inside an *ifsection, I got some
confusing error messages about trying to match “*If” in the request
path, which obviously didn’t work. Searching for this in the code led me
to server/core.c:
2360 /*
2361 * Set a dummy value so that other directives notice that
they are inside
2362 * a config section.
2363 */
2364 cmd->path = "*If";
I don’t think ‘path’ is the right place for such a dummy value, because
this breaks the pattern matching in mod_rewrite (somewhere at 3959++, if
I’m correct). I don’t know if any other module relies on this dummy
path, or if it can simply be removed?
The other bug(?) I found was while using mod_cache together with a bogus
backend sending wrong timestamps in the headers leading to
> [cache:info] [...] AH: cache: /myRequest?myQuery responded with an
uncacheable 304, retrying the request. Reason: contradiction: 304 Not
Modified, but Last-Modified modified, referer: https://my.host
resulting in deleting all entries from the cache:
> [cache:debug] [...] cache_storage.c(50): ... Removing url
user-agent... from the cache.
Ok, this way I found an error in my backend. The interesting part was
the "retrying the request”, which somehow lost the query string:
> [cache:debug] [...] cache_storage.c(664): ... cache: Key for entity
/myRequest?(null) is https://my.host:443/myRequest?, referer:
https://my.host
This time I got a valid answer of my backend, but due to the missing
query-string [(null)] with the wrong content. Worst thing is, this wrong
answer got stored by mod_cache for the full-request with the correct
query string. So for the following requests with the Query-String, I got
the answer for the request without the query-string (until cache time
was up).
Long story short - I haven't found the time to dig through the code, but
somewhere the query string got lost while "retrying the request".
Perhaps someone can give me a hint how to fix this.
regards Chriss
