>Number: 4768 >Category: mod_proxy >Synopsis: Proxy doesn't cache files containing Windows like returns >(CR+LF) >Confidential: no >Severity: serious >Priority: medium >Responsible: apache >State: open >Class: sw-bug >Submitter-Id: apache >Arrival-Date: Mon Jul 26 06:10:00 PDT 1999 >Last-Modified: >Originator: [EMAIL PROTECTED] >Organization: apache >Release: 1.3.4 >Environment: Linux balvenie 2.2.1 #2 SMP Fri Feb 12 14:43:14 CET 1999 i686 unknown >Description: I recently saw that mod_proxy didn't cache certain (static) HTML files. After further investigation, I found out that mod_proxy throws them away because the bytes sent and the bytes written to disk were different. (cache_req.written and cache_req.len differ in ap_proxy_cache_tidy) I then accessed Apache directly on his port, did a proxy request, saved the result to disk and compared to the temporary file which mod_proxy creates in the proxy folder. The only difference I found was that the temporary cache file contained Windows like returns (CR+LF, which show up in emacs as ^M), but the file which Apache returned didn't contain these returns.
So if the Apache API filters these ^M out, but mod_proxy saves them to the cache, them the bytes sent and the bytes written to disk must necessarily differ, so that ap_proxy_cache_tidy will throw away the cache file. >How-To-Repeat: Create a HTML file e.g. with NotePad, put it in the document space of a web server, access it via Apaches mod_proxy and perform an rgrep search in the /$APACHEROOT$/proxy folder for the URL of the file. The file should not be present in the cache. >Fix: >Audit-Trail: >Unformatted: [In order for any reply to be added to the PR database, you need] [to include <[EMAIL PROTECTED]> in the Cc line and make sure the] [subject line starts with the report component and number, with ] [or without any 'Re:' prefixes (such as "general/1098:" or ] ["Re: general/1098:"). If the subject doesn't match this ] [pattern, your message will be misfiled and ignored. The ] ["apbugs" address is not added to the Cc line of messages from ] [the database automatically because of the potential for mail ] [loops. If you do not include this Cc, your reply may be ig- ] [nored unless you are responding to an explicit request from a ] [developer. Reply only with text; DO NOT SEND ATTACHMENTS! ]
