X-Accel-Redirect issues - Image of 0 size

[habodal]

Hello,

I am trying to use the X-Accel-Redirect header feature of Dokuwiki.
However, when attempting to access images, for example, I receive an
image of zero size which the browsers displays as a URL. I believe my
nginx configuration is to blame.

Nginx config:

server {

        listen 80;

        server_name dev;

        root   /var/www/public_html/dev/public;
        index index.php;
        autoindex  on;

        location ~ \.php$ {
        include /usr/local/etc/nginx/fastcgi.conf;
        fastcgi_pass unix:/tmp/php-fpm.sock;
        fastcgi_index index.php;
        fastcgi_ignore_headers X-Accel-Redirect;
        fastcgi_pass_header X-Accel-Redirect;
        }

	location ^~ /doku/data {
	internal;
	alias /wiki/data;
	}

}


When I attempt to access
http://dev/doku/lib/exe/fetch.php?cache=&media=image.jpg (on filesystems
as /var/www/public_html/dev/public/doku/data/media/image.jpg) the
browser displays the following text with an image mimetype:

http://dev/doku/lib/exe/fetch.php?cache=&media=image.jpg


The headers received are:

Server: nginx
Date: Wed, 25 Aug 2010 06:06:42 GMT
Content-Type: image/jpeg
Expires: Thu, 26 Aug 2010 06:06:42 GMT
Cache-Control: public, proxy-revalidate, no-transform, max-age=86400
Pragma: public
Last-Modified: Mon, 23 Aug 2010 17:01:22 GMT
Content-Disposition: inline; filename="image.jpg";
X-Accel-Redirect:
/var/www/public_html/dev/public/doku/data/media/image.jpg

200 OK

In the access log the request is shown as:
"GET /doku/lib/exe/fetch.php?cache=&media=image.jpg HTTP/1.1" 499 0
"http://dev/doku/lib/exe/detail.php?id=start&media=image.jpg"
"GET /doku/lib/exe/fetch.php?cache=&media=image.jpg HTTP/1.1" 200 5
"http://dev/doku/lib/exe/detail.php?id=start&media=image.jpg"

I see the X-Accel-Redirect and correct mimetype headers are sent. Along
with the image not displaying, shouldn't X-Accel-Redirect header read:

X-Accel-Redirect: /wiki/data/media/image.jpg

due to the alias directive?

What am I doing wrong?

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,123375,123375#msg-123375