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7. 可用的全局變數

$args
$content_length
$content_type
$document_root
$document_uri
$host
$http_user_agent
$http_cookie
$limit_rate
$request_body_file
$request_method
$remote_addr
$remote_port
$remote_user
$request_filename
$request_uri
$query_string
$scheme
$server_protocol
$server_addr
$server_name
$server_port
$uri
	

7.1. http_user_agent

## Block http user agent - wget ##
if ($http_user_agent ~* (Wget|Curl) ) {
   return 403;
}

## Block Software download user agents ##
if ($http_user_agent ~* LWP::Simple|BBBike|wget) {
       return 403;
}

if ($http_user_agent ~ (msnbot|scrapbot) ) {
    return 403;
}


if ($http_user_agent ~ (Spider|Robot) ) {
    return 403;
}

		

7.1.1. 禁止非瀏覽器訪問

禁止非瀏覽器訪問

if ($http_user_agent ~ ^$) {
	return 412;
}
			

測試是否生效

tail -f /var/log/nginx/www.mydomain.com.access.log
			
telnet 192.168.2.10 80
GET /index.html HTTP/1.0
Host: www.mydomain.com
			

7.2. request_filename

    location / {
        root   /www/mydomain.com/info.mydomain.com;
        index  index.html;

		rewrite ^/$  http://www.mydomain.com/;

		valid_referers none blocked *.mydomain.com;
		if ($invalid_referer) {
			return 403;
		}

        proxy_intercept_errors  on;
	    proxy_set_header  X-Real-IP  $remote_addr;
        proxy_set_header  X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header  Host            $host;


        if (!-f $request_filename) {
          proxy_pass http://old.mydomain.com;
          break;
        }
    }
		
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