Hi, I have a script which regularly fetch some files from pkg.freebsd.org for keeping statistics. (https://www.klop.ws/pkgstats/pkg-age.html)
The command it executes is: "fetch -vv -o /home/ronald/verify_pkgs.sh/downloads/FreeBSD:13:armv7_latest_data.pkg --if-modified-since=/home/ronald/verify_pkgs.sh/downloads/FreeBSD:13:armv7_latest_data.pkg https://pkg.freebsd.org/FreeBSD:13:armv7/latest/data.pkg"; Mind that the request header If-Modified-Since has the exact same time as the response header Last-Modified. If-Modified-Since: Sun, 05 Oct 2025 04:47:06 GMT Last-Modified: Sun, 05 Oct 2025 04:47:06 GMT Still the response says HTTP/1.1 200 OK instead of 304 Not Modified. I've had this in my projects if the File.lastModified() returns a date with milliseconds, while the http-request time always uses 0 for milliseconds. In that case the file is always newer. NB: not all fetch requests have this behaviour. Some give a 304 response. Anyway, maybe the cause is something else. Would be nice to fix this optimization. Here the verbose output of the fetch command: scheme: "https" user: "" password: "" host: "pkg.freebsd.org" port: "0" document: "/FreeBSD:13:armv7/latest/data.pkg" ---> pkg.freebsd.org:443 resolving server address: pkg.freebsd.org:443 SSL options: 82004850 Peer verification enabled Using OpenSSL default CA cert file and path Verify hostname TLSv1.3 connection established using TLS_AES_128_GCM_SHA256 Certificate subject: /CN=pkg.freebsd.org Certificate issuer: /C=US/O=Certainly/CN=Certainly Intermediate R1 requesting https://pkg.freebsd.org/FreeBSD:13:armv7/latest/data.pkg
GET /FreeBSD:13:armv7/latest/data.pkg HTTP/1.1
If-Modified-Since: Sun, 05 Oct 2025 04:47:06 GMT
If-Modified-Since: Sun, 05 Oct 2025 04:47:06 GMT Host: pkg.freebsd.org Accept: */* User-Agent: fetch libfetch/2.0 Connection: close
<<< HTTP/1.1 200 OK <<< Connection: close <<< Content-Length: 9137918 <<< Server: nginx content length: [9137918] <<< Content-Type: application/octet-stream <<< Last-Modified: Sun, 05 Oct 2025 04:47:06 GMT <<< ETag: "68e1f84a-8b6efe" last modified: [2025-10-05 04:47:06] <<< X-Content-Type-Options: nosniff <<< X-XSS-Protection: 1; mode=block <<< X-Frame-Options: SAMEORIGIN <<< Accept-Ranges: bytes <<< Via: 1.1 varnish, 1.1 varnish <<< Date: Sat, 10 Jan 2026 11:04:02 GMT <<< X-Served-By: cache-chi-kigq8000150-CHI, cache-ams2100142-AMS <<< X-Cache: MISS, MISS <<< X-Cache-Hits: 0, 0 <<< X-Timer: S1768043043.639628,VS0,VE106 <<< Cache-Control: no-cache,no-store,max-age=0 <<< offset 0, length -1, size -1, clength 9137918 local size / mtime: 9137918 / 1759639626 remote size / mtime: 9137918 / 1759639626 /home/ronald/verify_pkgs.sh/downloads/FreeBSD:13:armv7_latest_d 8923 kB 20 MBps 01s Regards, Ronald.
