Mangled URLs or mirror when retrying after verification failure

Originally created by @sajolida on #15443 (Redmine)

Steps to reproduce:

1. Visit https://tails.boum.org/install/download.
2. Install Tails Verification.
3. Verify a dummy file to get a verification failure.
4. Click on “Please try to download again…”
5. You get a 404 error which comes from a mangled URL returned by replaceUrlPrefixWithRandomMirror.

See screenshot in attachment.

Feature Branch: web/15443-mangled-urls-on-download-retry

Attachments

• mangled.png

Parent Task: #12328 (closed)