ProxyFix defaults x_for to 1, so ProxyFix(app.wsgi_app, x_proto=1) never
disabled it: request.remote_addr and the access log were forgeable by any
client that reached the app directly. It is x_for=0 now, asserted rather
than assumed.
A mutation audit over the change set reverted 196 deliberate behaviours
and found 47 that no test noticed. This closes the ones that carry damage:
- apod_background lost its key check, its transport guard, its status
guard and its media-type check without a single test failing. Each one
turns a slow or unhappy NASA into a 500 on every page.
- Untrusted values reached innerHTML through window.I18N, which the
translation backend writes, and the modal's click handlers stacked so a
later click opened an earlier popup's URL.
- The sync tool could ask for HTML instead of text, translate from "auto"
instead of English, run without a timeout, store an empty translation
that marks the string done for good, abandon 28 languages because one
could not be written, and report success after reaching nothing.
- Neither the lint target, the CI jobs, the vendored RTL stylesheet, the
documented environment keys, nor any of the four hardenings in
scripts/run-e2e.sh was observed by anything.
Three of the new tests passed for the wrong reason on their first cut —
a mock that answered None whether or not the guard existed, a
raise_for_status that was never called, a string that stayed in the file
after the mutation. The audit found those too; all 24 reverts now fail.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
The interface ships translated; page content stays English until a
LibreTranslate instance fills app/i18n/content/ through make i18n. A string
without a catalogue entry falls back to its English source, so a half-filled
catalogue degrades instead of breaking.
Translation runs after ConfigurationResolver.resolve_links(), on a copy.
resolve_links matches by the `name` field, so translating it beforehand
would break every `link:` reference in the configuration.
negotiate() normalises to the primary subtag itself. Werkzeug's best_match
returns an exact match before it considers a primary-tag fallback, so the
Chrome default `de-DE,en;q=0.8` resolves to English there. "/" carries
Vary: Accept-Language, without which a shared cache pins the first
visitor's language for everyone.
The route rule lists the known codes as a converter argument. A bare
"/<lang>/" answers /robots.txt and /favicon.ico with a permanently
cacheable 308 to their trailing-slash form.
Templates gain lang, dir, the RTL stylesheet, a canonical URL and 30
hreflang alternates. Those are the first external URLs in this app:
ProxyFix takes the scheme from X-Forwarded-Proto so they do not claim
http:// behind a TLS-terminating proxy, X-Forwarded-Host stays untrusted
because nginx passes a client-supplied one through, and TRUSTED_HOSTS lets
Flask reject a forged Host outright.
Flask only autoescapes .html/.htm/.xml/.xhtml/.svg, so every *.html.j2
template interpolated configuration raw. Enabling it changes two lines of
the shipped page, both an apostrophe.
read_catalog degrades an unreadable catalogue to English rather than
serving a 500, and drops non-string entries that would otherwise render as
"42". i18n_sync writes atomically, never overwrites an existing entry,
refuses to touch a catalogue it could not parse, and leaves the file alone
when a run translated nothing.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
