Nginx/Fcgi: index.php issue with pseudo-alias location

Question

Nginx 1.6.2 on Debian Jessie

I want to map all example.com/forum/ requests to /path/to/htdocs/phpbb and cut off the /forum/ part in the URI. Someone on Stackoverflow recommended the "rewrite" solution instead of "alias", because there are some bugs.

server
{
    listen [::]:80;
    server_name example.com;
    root /var/www/html;

    index index.php index.html;
    #try_files $uri $uri/ =404;

    location /forum/
    {
        root /path/to/htdocs/phpbb;
        rewrite ^/forum/(.*)$ /$1 break;

        location ~ .+\.php$
        {
            rewrite ^/forum/(.*)$ /$1 break;
            include snippets/fastcgi-php.conf;
            fastcgi_pass unix:/var/run/php5-fpm.sock;
        }
    }
}

The example configuration works fine – example.com/forum/viewtopic.php executes the script /path/to/htdocs/phpbb/viewtopic.php – but example.com/ (index.php) doesn't work:

"/var/www/html/index.php" failed (2: No such file or directory)

After removing the "index" line from server block:

directory index of "/path/to/htdocs/phpbb/" is forbidden

After moving the "index" and/or "try_files" line(s) into the location block:

index.php served without passing over to php-fpm…

Ok, what's wrong with my config? Any hints?

killerbees19 · Accepted Answer · 2015-06-04 15:51:32Z

0

Ok, alias is buggy (rewrite too…), but if you avoid try_files and use if instead (even if evil…) it should work!

server
{
    listen [::]:80;
    server_name example.com;
    root /var/www/html;

    location /forum/
    {
        alias /path/to/htdocs/phpbb/;
        index index.php index.html;

        location ~ "^(/forum/)(.+\.php)(/.+){0,1}$"
        {
            if (!-f $document_root$2)
            {
                return 404;
            }

            fastcgi_index index.php;
            include fastcgi.conf;

            fastcgi_param  SCRIPT_FILENAME    $document_root$2;
            fastcgi_param  SCRIPT_NAME        $1$2;
            fastcgi_param  PATH_INFO          $3;

            fastcgi_pass unix:/var/run/php5-fpm.sock;
        }
    }
}

phpinfo() looks fine, but one question remains: Is it secure?

edited Jun 4, 2015 at 15:51

answered Jun 4, 2015 at 11:27

killerbees19

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