Public bug reported: ## This one doesn't work:
me$ zsync "https://cdimage.ubuntu.com/xubuntu/releases/24.04/release/xubuntu-24.04.2-minimal-amd64.iso.zsync"; failed on url https://cdimage.ubuntu.com/xubuntu/releases/24.04/release/xubuntu-24.04.2-minimal-amd64.iso.zsync could not read control file from URL https://cdimage.ubuntu.com/xubuntu/releases/24.04/release/xubuntu-24.04.2-minimal-amd64.iso.zsync ## This one works: me$ zsync "http://cdimage.ubuntu.com/xubuntu/releases/24.04/release/xubuntu-24.04.2-minimal-amd64.iso.zsync"; #################### 100.0% 2003.4 kBps DONE reading seed file xubuntu-24.04.2-minimal-amd64.iso: *********... ## Conclusion It seems that zsync can download from http but not from https. This is confusing, because on https://cdimage.ubuntu.com/xubuntu/releases/24.04/release/ I get links to https sources, and there's no warning neither on the page nor in the man page that https is not supported $ dpkg -l | grep zsync ii zsync 0.6.2-5build1 amd64 client-side implementation of the rsync algorithm $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 24.04.2 LTS Release: 24.04 Codename: noble ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: zsync 0.6.2-5build1 ProcVersionSignature: Ubuntu 6.8.0-62.65-generic 6.8.12 Uname: Linux 6.8.0-62-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.7 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: XFCE Date: Fri Jun 27 12:44:10 2025 Dependencies: gcc-14-base 14.2.0-4ubuntu2~24.04 libc6 2.39-0ubuntu8.4 libgcc-s1 14.2.0-4ubuntu2~24.04 libidn2-0 2.3.7-2build1.1 libunistring5 1.1-2build1.1 ExecutablePath: /usr/bin/zsync SourcePackage: zsync UpgradeStatus: Upgraded to noble on 2025-06-07 (20 days ago) ** Affects: zsync (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2115491 Title: zsync cannot load data from https To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zsync/+bug/2115491/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
