/media served a downloaded file with ServeFile, which types it by its
extension, and the file and its name are the publisher's. An enclosure
saved as .svg or .html, which download::sniff lets through unless it
starts <html or <!doctype html, opened from "View in a new tab" ran its
script on iPX's origin with the viewer's session.
Now every /media response is nosniff, anything but audio, video, a
non-SVG image, a PDF or plain text is sent as an attachment, and all
but PDFs get the sandbox CSP artwork already had. PDFs go without it
because Chrome refuses to render one in a sandboxed document; its
viewer does not run the PDF's script as the page.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
rays
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