Reverse proxy didn't redirect http protocol

[Dewangga]

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Hello,

I have a page contains 'http://' assets, and I do redirect on my nginx
like this :

- -------- BEGIN CONFIGURATION --------
server {
        listen 80;
        server_name subdomain.domain.com;
        return 301 https://$http_host$request_uri$is_args$query_string;
}

server {
        listen 443 ssl spdy;
        server_name subdomain.domain.com;

        location / {
                proxy_pass http://127.0.0.1:8080;
        }

        ssl on;
        ssl_certificate
/etc/nginx/certs/star-domain.com-bundle.crt;
        ssl_certificate_key     /etc/nginx/certs/star-domain.com.key;
        ssl_verify_depth 2;

        location ~* ^.+\.(jpg|jpeg|gif|png|css|js|ico)$ {
                root /home/kincirplay/public_html;
                expires 1y;
                add_header Link "<$scheme://$http_host$request_uri>;
rel=\"prefetch\"";
        }
}
- -------- END CONFIGURATION --------

Here is my proxy.conf and ssl.conf configuration (stored on conf.d
directory).

proxy.conf http://ur1.ca/i45bu
ssl.conf http://ur1.ca/i45bx

Can I do redirect my http assets (without change the code) using this
configuration? If can't, is it possible? If possible, I need your help
to reconfigure the configuration.

Thanks in advance :)
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