fastcgi_mono_server 4 wildcard hostname - nginx

Question

I have configured nginx with fastcgi_mono_server4.
In my nginx config I have 2 hostnames :
server {
listen 80;
server_name dev.example.org
location / {
root /var/www/dev.example.org/;
fastcgi_index Default.aspx;
fastcgi_pass 127.0.0.1:9001;
include /etc/nginx/fastcgi_params;
}
}
server {
listen 80;
server_name *.example.org
location / {
root /var/www/example.org/;
fastcgi_index Default.aspx;
fastcgi_pass 127.0.0.1:9000;
include /etc/nginx/fastcgi_params;
}
}
nginx is OK with this configuration. dev goes to one and all other to another one .
I've already tried this :
fastcgi-mono-server4 /applications=*.example.org:/:/var/www/example.org/ /socket=tcp:127.0.0.1:9000
but it throws an error (Uri parse exception)
Update :
I need to get the full host name in my application, for example if the request was abc.example.org, I need to get "abc".
Unfortunately, HttpContext.Current.Request.Url does not contains "abc" but "*" which causes the parse error

Answer 1

If nginx is going to take care of routing the appropriate sub-domains to each fastcgi port (9000 or 9001) then can you get away with a wildcard domain when you start the mono server process e.g. just use a * instead of '*.example.org'
fastcgi-mono-server4 /applications=*:/:/var/www/example.org/ /socket=tcp:127.0.0.1:9000
Update: The above works to get two Mono server apps listening via nginx, but, using the nginx config from the original question will lead to an exception if you call HttpContext.Request.Url on the catch-all server. This is due to it not liking the * in *.example.org.
There are two possible solutions, depending what you'd like to see returned from HttpContext.Request.Url when a client browses foo.example.org, bar.example.org etc.
Option 1: If you don't care about the sub-domain and want to see example.org
Configure the second (*.example.org) nginx server to be the 'default_server' and have it assign a server-name without the wildcard e.g.
server {
listen 80 default_server;
server_name example.org;
access_log ... }
With these settings, browsing to foo.example.org/Default.aspx loads the page and HttpContext.Request.Url returns example.org/Default.aspx
Option 2: If you want to see the actual sub-domain e.g. foo.example.org
Removing the server_name from the second server definition works.
server {
listen 80 default_server;
access_log ... }
With these settings, browsing to foo.example.org/Default.aspx loads the page and HttpContext.Request.Url returns foo.example.org/Default.aspx

Answer 2

#stephen's answer is more simple and does not need fastcgi config modification.
I tried previous answer (before update), but it did not work.
Nginx take care of routing, as #stephen said, and the routing part worked.
to start fastcgi I used this command to match all routes (and server names)
fastcgi-mono-server4 /applications=/:/var/www/example.org/ /socket=tcp:127.0.0.1:9000
The problem was that HttpContext.Request.Url contains the $server_name value in my case it was "*.example.org" and when I try to parse URI there was an error.
To handle this I changed nginx fastcgi_params and replaced thi line
fastcgi_param SERVER_NAME $server_name;
by
fastcgi_param SERVER_NAME $http_host;
and add in site-available conf
proxy_set_header Host $host;
I think it is set by default.
reload nginx
nginx -t && service nginx reload
reload fastcgi-mono-server to test
fastcgi-mono-server4 /applications=/://var/www/example.org/ /socket=tcp:127.0.0.1:9000 /printlog=True /loglevels=Debug
in the log SERVER_NAME contains the real (not *) subomain.