On 13.02.2009, at 13:00, Vinay Sajip wrote:
Just taking my first steps with CouchDB. I notice that the HTTP
caching headers
currently put out cause IE (for example) to not display information
correctly in
Futon. It's easy to reproduce: I open windows in Firefox and IE
simultaneously,
do an update using Firefox (e.g. add a new document) and refresh the
IE window.
The updated document count is not shown. If I clear the browser
cache and try
again, the updated information is displayed.
The HTTP header put out is
Cache-Control: must-revalidate
which seems to me insufficient - for IE, at least. Is there way of
configuring
these headers, to for example
Cache-Control: no-cache
Pragma: no-cache
Expires: some date in the past, or the same value as the Date: header
This is due to extra-aggressive (and against the HTTP spec) caching
that IE does on XMLHTTPRequests.
A patch would need to do user agent sniffing to conditionally add the
"cache: false" parameter to the jQuery ajax() invocations in
jquery.couch.js (and maybe elsewhere). I wouldn't want to add this for
all user agents, as it basically circumvents any caching for AJAX
requests (even for not-craptastically-broken implementations), and
thus would add quite a bit of unnecessary overhead.
Cheers,
--
Christopher Lenz
cmlenz at gmx.de
http://www.cmlenz.net/
