How to use nginx to intercept specified URL requests through regular expressions

nginx server

nginx is an excellent web server that is very efficient in processing static files. At the same time, its proxy forwarding function is also very simple and efficient when combined with other background servers.

location

We know that nginx will parse the request and then get information about the requested URL. We only need to match the URL and then intercept it.

Matching rules

location / {
  if ($request_uri ~* ^/\?http(.*)$) {
         return 404;
     }
  }

After such matching, we can intercept all requests to the root directory URL and the parameter is ?httpxxx. Similar requests will display 404.

Anti-hotlink

Returns the http code, for example, to set up nginx anti-hotlinking:

location ~* \.(gif|jpg|png|swf|flv)$ {
  valid_referers none blocked www.80shihua.com www.menghuiguli.com;
  if ($invalid_referer) {
    return 404;
  }
}

nginx common variables

nginx parses out many variables that we commonly use. We just need to use them. The following are the commonly used variables of nginx. For specific usage, please refer to the official documentation.

$content_length

$content_type

$cookie_

$date_gmt

$date_local

$document_root

$document_uri

$fastcgi_path_info

$fastcgi_script_name

$gzip_ratio

$host

$hostname (ngx_http_core_module)

$hostname (ngx_stream_core_module)

$http2

$http_

$protocol

$proxy_host

$proxy_port

$query_string

$realpath_root

$request

$request_body

$request_uri

$scheme

$server_name

$uri

Summarize

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