Downloads require an Authorization header, which <iframe>/<img> cannot
send. The previous blob: workaround broke under download managers (IDM
hooks blob URLs, fails to resolve them, and leaves a 0-byte file) and in
Chrome's mobile emulation, which has no inline PDF plugin.
Backend:
- preview_token.py: HMAC-signed token bound to one (quote, kind, file)
with a 5-minute TTL, keyed off an existing secret
- GET /quotes/{id}/preview-url/{kind}/{attachment} mints the URL
- the two file GET routes accept a Bearer session OR the signed ?t= token
(they leave the global auth dep, so the other six file routes now carry
it explicitly — nothing is open by omission)
Frontend:
- api.files.previewUrl() replaces the blob helper
- shared FilePreviewModal + useFilePreview; FileList and the dashboard
quote card both use it
- PDFs render with the browser's native viewer on desktop and pdf.js on
canvas where no inline viewer exists (mobile); pdf.js is fed the bytes
in memory so no PDF URL is exposed for a download manager to intercept
- removed the per-attachment download buttons on the dashboard card and
the modal header
Ops:
- nginx: explicit MIME types (.mjs as text/javascript) — a module worker
served as octet-stream is refused and crashed the page
- frontend service bypasses the nginx entrypoint, whose apk manifest call
hangs when the package mirror is unreachable (502s)
Both download endpoints (invoice/proforma) put the stored file_name raw into the Content-Disposition header. HTTP headers are latin-1, so any non-ASCII name (i.e. every Persian filename) raised UnicodeEncodeError before the body was sent -> HTTP 500. Uploads were unaffected.
Content-Disposition is now built by a helper following RFC 6266 / RFC 5987: the UTF-8 name is percent-encoded in filename*=UTF-8''..., with a header-safe ASCII fallback in filename= (quotes and control characters stripped; a name that folds away entirely becomes attachment<ext>).
Verified locally after reproducing the exact production error (same latin-1 positions 22-27): Persian proforma + invoice downloads 500 -> 200 with filename*= carrying the full Persian name and bytes sha256-matching the MinIO object; ASCII filename regression 200; helper edge cases (CRLF/quote injection stripped, empty name -> attachment, pure-Persian png -> attachment.png); no UnicodeEncodeError in the api logs after the fix.
MMD
whqreza