Nginx config WP Super Cache

server.conf

server {
  listen 80 default;
  server_name example.com www.example.com;
  server_name_in_redirect  off;
  default_type text/html;

  set $cache_uri $request_uri;

  # POST requests and urls with a query string should always go to PHP
  if ($request_method = POST) {
    set $cache_uri 'null cache';
  }
  if ($query_string != "") {
    set $cache_uri 'null cache';
  }   

  # Don't cache uris containing the following segments
  if ($request_uri ~* "(/wp-admin/|/xmlrpc.php|/wp-(app|cron|login|register|mail).php|wp-.*.php|/feed/|index.php|wp-comments-popup.php|wp-links-opml.php|wp-locations.php|sitemap(_index)?.xml|[a-z0-9_-]+-sitemap([0-9]+)?.xml)") {
    set $cache_uri 'null cache';
  }   

  # Don't use the cache for logged in users or recent commenters
  if ($http_cookie ~* "comment_author|wordpress_[a-f0-9]+|wp-postpass|wordpress_logged_in") {
    set $cache_uri 'null cache';
  }

  location = /favicon.ico { log_not_found off; access_log off; }
  location = /robots.txt  { log_not_found off; access_log off; }


  location / {
    root /var/www/example.com;
    index index.html index.htm index.php;
    try_files /wp-content/cache/supercache/$http_host/$cache_uri/index.html $uri $uri/ @apache ;
    access_log off;

    location ~ .php$ {
      proxy_pass http://127.0.0.1:8080;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header Host $host;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

    location ~* ^.+.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|doc|xls|exe|pdf|ppt|txt|tar|mid|midi|wav|bmp|rtf|js|swf|flv|mp3)$ {
      try_files /maintenance.html $uri/ $uri @apache;
      access_log off;
    expires 30d;
    }

    proxy_pass http://127.0.0.1:8080;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    error_page 404 502 504 = @apache;
  }

  location @apache {
    proxy_pass http://127.0.0.1:8080;
    proxy_set_header X-Real-IP $remote_addr;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }
}