Xia Qingran wrote:
After reading http://wiki.nginx.org, I find out that nginx has not the
offical support for the HTTP Etag,
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.19 . I
want to know whether the future version of nginx will add this
feature.
My website is taking use of nginx to run static files server including
lots of Javascipt and CSS files modified frequently. Now I set a very
short expires time like, expires 1h, to renew the client cache as soon
as possible.
But I think it is not a good solution. It wastes my network bandwidth
if I do not modify the static files.
If last-modifed date of file is not changed, bandwidth saved:
client send in request
header If-Modified-Since:
and if time in request same as time of file modification on disk nginx send
reply
HTTP/1.x 304 Not Modified
In general Etag for static files is not better than Last-Modified header.
Etag is useful for dynamic content, when modify time is not known. In this case
Etage can be
generated from hash (md5/sha) of content.
6 messages in ru.sysoev.nginxRe: Will nginx support HTTP Etag ?
