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# This is an annotated subset of the Nginx configuration from our Magento production platform @ www.hypernode.com
# See https://www.byte.nl/blog/magento-cacheleak-issue 

user app;
worker_processes 4;
pid /var/run/nginx.pid;

events {
    worker_connections 768;
}

http {
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    server_tokens off;
    server_names_hash_bucket_size 64;

    # allows big media uploads
    client_max_body_size 120m;

    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # GeoIP support is included in the Ubuntu 12.04 Nginx.
    # This enables logging, and the following:
    #    if ($geoip_country_code ~ (CN|ZW) ) {
    #      return 403;
    #    }
    geoip_country         /usr/share/GeoIP/GeoIP.dat;
    gzip on;
    gzip_disable "msie6";

    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    gzip_min_length  1000;
    gzip_proxied any;
    gzip_types       text/plain text/html application/json application/xml text/css text/js application/x-javascript;

    # Determine whether a request comes from a human, a search crawler or another bot.
    map $http_user_agent $is_non_search_bot {
        default '';
        ~*(google|bing|pingdom|monitis.com|Zend_Http_Client) '';
        ~*(http|crawler|spider|bot|search|ForusP|Wget/|Python-urllib|PHPCrawl|bGenius) 'bot';
    }
    
    # Rate limit bots (that are not search spiders) to one PHP request per second.
    # An empty '$limit_bots' would disable rate limiting for this requests
    limit_req_zone $is_non_search_bot zone=bots:1m rate=1r/s;
    limit_req_log_level error;

    index index.html index.php;

    server {
        listen 80 default_server;
        root /var/www;
        
        # Android dupe request bug, https://www.byte.nl/blog/android-bug-can-kill-site-duplicate-requests
        set $request_url "$scheme://$http_host$request_uri";
        if ($request_url = $http_referer) {
           set $request_is_referer 1;
        }
        if ($http_user_agent ~ 'Android ([23]|4\.[0123])') {
            set $android_buggy_ua 1;
        }
        set $android_dupe_bug "${request_method}${android_buggy_ua}${request_is_referer}";
        if ($android_dupe_bug = 'GET11') {
            # http://en.wikipedia.org/wiki/List_of_HTTP_status_codes
            return 429;
        }
        
        # Denied locations require a "^~" to prevent regexes (such as the PHP handler below) from matching
        # http://nginx.org/en/docs/http/ngx_http_core_module.html#location
        location ^~ /app/                       { return 403; }
        location ^~ /includes/                  { return 403; }
        location ^~ /media/downloadable/        { return 403; }
        location ^~ /pkginfo/                   { return 403; }
        location ^~ /report/config.xml          { return 403; }
        location ^~ /var/                       { return 403; }
        location ^~ /lib/                       { return 403; }
        location ^~ /dev/                       { return 403; }
        location ^~ /RELEASE_NOTES.txt          { return 403; }
        location ^~ /downloader/pearlib         { return 403; }
        location ^~ /downloader/template        { return 403; }
        location ^~ /downloader/Maged           { return 403; }
        location ~* ^/errors/.+\.xml            { return 403; }

        # CVE-2015-3428 / AW_Blog vulnerability
        # Note the .+ at the start: We want to allow url's like
        # order=create_date, which would otherwise match.
        if ($arg_order ~* .+(select|create|insert|update|drop|delete|concat|alter|load)) {
           return 403;
        }

        # Don't skip .thumbs, this is a default directory where Magento places thumbnails
        # Nginx cannot "not" match something, instead the target is matched with an empty block
        # http://stackoverflow.com/a/16304073
        location ~ /\.thumbs {
        }

        # Skip .git, .htpasswd etc
        location ~ /\. {
            return 404;
        }
     
        set $fastcgi_root $document_root;

        location / {
            try_files $uri $uri/ @handler;
            expires 30d;
        }

        # SUPEE 6285
        # Only allow the new url case sensitive lowercase, deny case insensitive
        location ^~ /rss/order/new {
            echo_exec @handler;
        }
        location ^~ /rss/catalog/notifystock {
            echo_exec @handler;
        }
        location ^~ /rss/catalog/review {
            echo_exec @handler;
        }
        location ~* /rss/order/new {
            return 403;
        }
        location ~* /rss/catalog/notifystock {
            return 403;
        }
        location ~* /rss/catalog/review {
            return 403;
        }

        ## Order IS important! this is required BEFORE the PHP regex
        ## Allow PHP scripts in skin and JS, but render static 404 pages when skin or js file is missing
        ## Magento has RewriteCond %{REQUEST_URI} !^/(media|skin|js)/ in default htaccess
        location ~ ^/(skin|js)/ {
            location ~ \.php$ {
                echo_exec @phpfpm;
            }
            try_files $uri $uri/ =404;
            expires 30d;
        }
        # Disallow PHP scripts in /media/
        # Also render static 404 pages for missing media
        location ~ ^/media/ {
            location ~ \.php$ {
                return 403;
            }
            try_files $uri $uri/ =404;
            expires 30d;
        }

        location @handler {
            rewrite / /index.php;
        }
        
        location @fastcgi_backend {
        
            # Bot rate limit, https://gist.github.com/supairish/2951524
            # Burst=0 (default) --WdG
            limit_req zone=bots;
        
            # server_name is read-only, so we need a temp var
            set $my_server_name $server_name;
            if ($my_server_name = "") {
                set $my_server_name $http_host;
            }
        
            try_files $uri =404;
            expires off;
            root $fastcgi_root;
            fastcgi_read_timeout 900s;
            fastcgi_index index.php;
            fastcgi_pass $fastcgi_pass;
        
            include /etc/nginx/fastcgi_params;
        
            fastcgi_param HTTP_AUTHORIZATION $http_authorization;
            fastcgi_param SERVER_NAME $my_server_name;
        
            fastcgi_param NGINX_REQUEST_TIME $date_gmt;
        
            # If these variables are unset, set them to an empty value here
            # so they are al least defined when fastcgi_param directives are called
            if ($storecode = "") {
                set $storecode "";
            }
        
            if ($storetype = "") {
                set $storetype "";
            }
        
            # These are set in http.magerunmaps
            fastcgi_param MAGE_RUN_CODE $storecode if_not_empty;
            fastcgi_param MAGE_RUN_TYPE $storetype if_not_empty;
        
        }
        
        location @phpfpm {
            set $log_handler phpfpm;
            set $fastcgi_pass 127.0.0.1:9000;
            echo_exec @fastcgi_backend;
        }
        
        location @hhvm {
            set $log_handler hhvm;
            set $fastcgi_pass 127.0.0.1:9001;
            echo_exec @fastcgi_backend;
        }

        # Protection against unsecured magmi installs. User-editable
        # so user may set it up as they want. Must be included here
        # to catch and redirect PHP files, if this was loaded in later
        # (after the default php-fpm handler for .php files) then we
        # would not be able to redirect the magmi .php files (which are
        # the ones we really MUST redirect).
        location ~* /magmi($|/) {
            return https://support.hypernode.com/knowledgebase/securing-access-to-magmi/;
        }
        
        location ~ .php/ {
            rewrite ^(.*.php)/ $1 last;
        }
    
        # always execute our own handler for php-fpm, to prevent serving raw php code and to have
        # a default when user removes configuration from ~/nginx/
        location ~ \.php$ {
            echo_exec @phpfpm;
        }
    
        
        rewrite ^/minify/([0-9]+)(/.*.(js|css))$ /lib/minify/m.php?f=$2&d=$1 last;
        rewrite ^/skin/m/([0-9]+)(/.*.(js|css))$ /lib/minify/m.php?f=$2&d=$1 last;
        location /lib/minify/                   { allow all; }
        
    }

}