While developing an application that automatically download files, I came across the following URL, which is a file with the following content-disposition header:
Content-Disposition: attachment; filename="setup.exe"; filename*=utf-8''hdplayer_setup.exe
Does anybody know what the values of this header mean, in particular the second
filename* parameter? Is it normal that it has two filename parameters?
Chrome, Firefox and Safari all parse this as just
hdplayer_setup.exe (and not something broken like
utf-8''hdplayer_setup.exe) so it seems to be a valid case. Any idea?
It's described in the Content-Disposition specification; see http://greenbytes.de/tech/webdav/rfc6266.html.
(to find the relevant spec you can use the IANA header field registry: http://www.iana.org/assignments/message-headers/message-headers.xhtml)