atom feed22 messages in org.w3.public-htmlUA support for Content-Disposition he...
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Julian ReschkeMar 14, 2008 6:48 am 
Lachlan HuntMar 14, 2008 7:42 am 
Julian ReschkeMar 14, 2008 7:50 am 
Julian ReschkeMar 14, 2008 7:54 am 
Lachlan HuntMar 14, 2008 8:01 am 
Julian ReschkeMar 14, 2008 8:17 am 
Michael A. Puls IIMar 14, 2008 9:25 am 
Julian ReschkeMar 14, 2008 9:38 am 
Brian SmithMar 14, 2008 11:45 am 
Julian ReschkeMar 14, 2008 12:04 pm 
Maciej StachowiakMar 15, 2008 10:54 pm 
Julian ReschkeMar 16, 2008 4:02 am 
Maciej StachowiakMar 16, 2008 11:34 am 
Julian ReschkeMar 16, 2008 12:00 pm 
Maciej StachowiakMar 16, 2008 3:46 pm 
Karl DubostMar 16, 2008 10:56 pm 
Leif Halvard SilliMar 17, 2008 11:45 am 
Julian ReschkeMar 17, 2008 2:35 pm 
Brian SmithMar 18, 2008 9:01 am 
Julian ReschkeMar 18, 2008 9:58 am 
Brian SmithMar 21, 2008 9:24 am 
Julian ReschkeMar 21, 2008 5:07 pm 
Subject:UA support for Content-Disposition header (filename parameter)
From:Julian Reschke (juli@gmx.de)
Date:Mar 14, 2008 6:48:08 am
List:org.w3.public-html

Here's a problem that plagued me a few years ago, and I'm pretty sure the situation hasn't improved since then, at least not in IE. Maybe HTML5 should say something about it.

Use case: have the UA offer a "save as" dialogue, including the filename.

Mechanism: Content-Disposition HTTP header, as defined in RFC2616 (<http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.19.5.1>)

Example:

Content-Disposition: attachment; filename=fname.ext

Problem: this works fine in all browsers, as long as the filename does not contain non-Latin1 characters.

RFC 2231 (<http://greenbytes.de/tech/webdav/rfc2231.html>) defines an escaping, and that is supported by Firefox. Example:

Content-Disposition: attachment; filename*=utf8''D%C3%BCrst.ext

IE does not support RFC 2231 (as of IE7), but allows percent escaped UTF-8, such as in:

Content-Disposition: attachment; filename=D%C3%BCrst.ext

However, that only works when IE is configured for UTF-8 URL encoding, which is (as far as I recall) not the default in countries using Asian languages.

Proposal: require UAs to support RFC 2231 (UTF-8 variant).

BR, Julian