Alias, regex and try_files am i doing it wrong, or is this a bug?

Server NGINX
1

Ok, i was trying to do drupal as a subdirectory on my site, but i’ve hit
a problem and I think its a bug. Im using 10.04 ubuntu, the nginx ppa
with 1.0.11 nginx.

If i have the following config’s and i try to retrieve the file
http://mysite/drupal/somefile:

location ~ /drupal(.*) {
index index.php;
alias /local_config/$1;
try_files $uri @drupalrewrite;
}

The file nginx is apparently trying retrieve
“/local_config//somefile/drupal/somefile” rather then
“/local_config//somefile”, which leads me to believe $uri isnt being set
correctly by nginx.

If instead, i have this as a config:

location /drupal/ {
index index.php;
alias /local_config/;
try_files $uri @drupalrewrite;
}

it does the right thing, and try files will attempt to get
“/local_config/somefile”, so im really confused as to why it happens.
Either im doing something wrong or in the first example, $uri gets set
incorrectly? some small chunks of debug output to show what i mean:

From the first config:
2012/01/13 04:03:18 [debug] 22504#0: *4 http request line: “GET
/drupal/somefile HTTP/1.1”
2012/01/13 04:03:18 [debug] 22504#0: *4 http uri: “/drupal/somefile”
2012/01/13 04:03:18 [debug] 22504#0: *4 http args: “”
…
2012/01/13 04:03:18 [debug] 22504#0: 4 using configuration
"/drupal(.)"
…
2012/01/13 04:03:18 [debug] 22504#0: *4 trying to use file:
“/drupal/somefile” “/local_config//somefile/drupal/somefile” ← path
looks incorrect?

From the second config:
2012/01/13 04:26:58 [debug] 23019#0: *1 http request line: “GET
/drupal/somefile HTTP/1.1”
2012/01/13 04:26:58 [debug] 23019#0: *1 http uri: “/drupal/somefile”
…
2012/01/13 04:26:58 [debug] 23019#0: *1 using configuration “/drupal/”
…
2012/01/13 04:26:58 [debug] 23019#0: *1 trying to use file: “somefile”
“/local_config/somefile” <— correct

Posted at Nginx Forum:

2

Maxim D. Wrote:

The file nginx is apparently trying retrieve
think that behaviour of try_files with alias in a
regexp location
is inherently undefined, but the example above
should certainly
work as expected.)

Thanks for confirming, was driving me a little nuts trying to work out
why it was coming up with the paths it was using.

Regards

Posted at Nginx Forum:

3

Hello!

On Thu, Jan 12, 2012 at 11:36:41PM -0500, takigama wrote:

try_files $uri @drupalrewrite;

}

The file nginx is apparently trying retrieve
“/local_config//somefile/drupal/somefile” rather then
“/local_config//somefile”, which leads me to believe $uri isnt being set
correctly by nginx.

Yes, this looks like a bug for me.

(Internally, the problem is a bit complex, and I event tend to
think that behaviour of try_files with alias in a regexp location
is inherently undefined, but the example above should certainly
work as expected.)

If instead, i have this as a config:

location /drupal/ {
index index.php;
alias /local_config/;
try_files $uri @drupalrewrite;
}

it does the right thing, and try files will attempt to get
“/local_config/somefile”, so im really confused as to why it happens.

This works as expected.

The difference is that in a regexp location the “alias” directive
specifies full path to a file to use, and try_files isn’t
currently able to handle this.

Maxim D.