Public bug reported: Binary package hint: squid
I'm running a squid transparent proxy on my home network. Sometimes, a client makes a request that: * specifies a Range * specifies no caching (using Cache-control: max-age=0 and Pragma: no-cache) In this case, Squid will fetches the entire files even though it is obvious from the request that doing so is wasteful. The excess bytes won't be cached (because of the no-cache headers) or delivered to the client (because it just requested a range), so they are discarded. If the file is large, and the client makes a series of no-cache + range requests for the one file, then the client's download will take *much* longer than it should, and waste lots of bandwidth, because squid will keep fetching the whole file over and over for each request. Here's an actual request sent by a client: GET /bzr/bzr.dev/.bzr/repository/indices/a3069b4df97462558e8666ff0cc72386.rix HTTP/1.1 User-Agent: bzr/0.93.0.dev.0 (pycurl: libcurl/7.16.4 GnuTLS/1.6.3 zlib/1.2.3.3 libidn/1.0) Host: bazaar-vcs.org Accept: */* Cache-control: max-age=0 Pragma: no-cache Connection: Keep-Alive Range: bytes=0-65535,567019-632554 And here's what squid sent: GET /bzr/bzr.dev/.bzr/repository/indices/a3069b4df97462558e8666ff0cc72386.rix HTTP/1.0 User-Agent: bzr/0.93.0.dev.0 (pycurl: libcurl/7.16.4 GnuTLS/1.6.3 zlib/1.2.3.3 libidn/1.0) Host: bazaar-vcs.org Accept: */* Pragma: no-cache Via: 1.1 home.puzzling.org:3128 (squid/2.6.STABLE14) X-Forwarded-For: 10.0.0.3 Cache-Control: max-age=0 Connection: keep-alive (This is particularly bad for bzr, because "pack" format repositories consist of a handful of large files, and the client will fetch data from those repositories by issuing many small requests using the range header!) I think this may be related to http://www.squid- cache.org/bugs/show_bug.cgi?id=1337 ** Affects: squid (Ubuntu) Importance: Undecided Status: New -- squid fetches entire files when it shouldn't https://bugs.launchpad.net/bugs/175294 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
