HTTP headers / response header

Content-Disposition

Content-Disposition: attachment; filename="report.pdf"

What it does

Whether the body displays inline or downloads as an attachment, with the suggested filename.

The gotcha

Non-ASCII filenames need the filename*=UTF-8''… RFC 5987 form; bare UTF-8 in filename breaks across browsers.

Debugging headers on a phone

The fastest way to see what Content-Disposition is actually doing is to send the request and read both sides raw — ReqPad shows auto-generated and custom headers for every request, on all six protocols, with history. Related references: status codes · WWW-Authenticate · Content-Encoding · Transfer-Encoding · ETag · Last-Modified · Expires

Inspect Content-Disposition on a live request.

Build the request, send it, read raw headers and timing — from your iPhone. Free to start.

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