Problem with inheriting fastcgi params

[Cliff Wells]

On Sat, 2009-06-06 at 00:17 +0400, Maxim Dounin wrote:
> Hello!
> 
> On Fri, Jun 05, 2009 at 12:36:36PM -0700, Michael Shadle wrote:
> 
> > I have my normal fastcgi params in my main nginx.conf file, under server {}
> > 
> > i.e.:
> > 
> > fastcgi_param QUERY_STRING $query_string;
> > fastcgi_param REQUEST_METHOD $request_method;
> > fastcgi_param CONTENT_TYPE $content_type;
> > fastcgi_param CONTENT_LENGTH $content_length;
> > fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
> > fastcgi_param SCRIPT_NAME $fastcgi_script_name;
> > fastcgi_param REQUEST_URI $request_uri;
> > fastcgi_param DOCUMENT_URI $document_uri;
> > fastcgi_param DOCUMENT_ROOT $document_root;
> > fastcgi_param SERVER_PROTOCOL $server_protocol;
> > fastcgi_param GATEWAY_INTERFACE CGI/1.1;
> > fastcgi_param SERVER_SOFTWARE nginx/$nginx_version;
> > fastcgi_param REMOTE_ADDR $remote_addr;
> > fastcgi_param REMOTE_PORT $remote_port;
> > fastcgi_param SERVER_ADDR $server_addr;
> > fastcgi_param SERVER_PORT $server_port;
> > fastcgi_param SERVER_NAME $http_host;
> > fastcgi_ignore_client_abort on;
> > fastcgi_buffers 32 8k;
> > fastcgi_index index.php;
> > 
> > 
> > The problem is, whenever I want to add a variable (maybe override too,
> > I forget) it seems to clear all the other ones out:
> > 
> >                location ~ \.php$ {
> >                         fastcgi_pass 127.0.0.1:11003;
> >                         fastcgi_param HTTPS on;
> >                 }
> > 
> > Now, only fastcgi_param HTTPS is set. no more SCRIPT_FILENAME so it's broken.
> 
> It's expected and documented behaviour.  All array-type settings 
> behave like this: they are inherited from upper levels only if 
> none defined at this particular level.

Interesting.   I was aware of the limitation Michael mentions, but
didn't realize this was the particular mechanism.   So I assume that
"array-type" is indicated by the variable prefixes, i.e. fastcgi_*,
proxy_*, etc?

If you'll confirm this, I'll get it into the FAQ.

Cliff

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