Hi,

I'm doing some sort of downstream cache that I save every entire page into
memcached from the application with urls such as:

www.example.com/file/path/?query=1

then I'm fetching them from nginx if available with the config:
location / {
# try to fetch from memcached
set $memcached_key "$host$request_uri";
memcached_pass localhost:11211;
expires 10m;
# not fetched from memcached, fallback
error_page 404 405 502 = @fallback;
}


This works perfectly fine for latin char urls. However, it fails to catch
unicode urls such as:

www.example.com/flights/istc-lonc-11062014/lonc-istc-19062014/Cheap-return-tickets-from-%C4%B0stanbul-to-Londra-in-Haziran.html?class=economy&adult=1

The unicode char "%C4%B0" appears same in the nginx logs, application cache
setting key (that is actually taken from raw REQUEST_URI what nginx gives).

The example url content also exist in the memcached itself when if I try:
"get
www.example.com/flights/istc-lonc-11062014/lonc-istc-19062014/Cheap-return-tickets-from-%C4%B0stanbul-to-Londra-in-Haziran.html?class=economy&adult=1
"

However, nginx cannot fetch anything from memcached, @fallbacks every time.

I'm using version 1.6.0. Any help is much appreciated.

Roy.
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