gistfile1.nginxconf

                location /aaa/ {
#                   internal;
                    set $upstream "";
                    set $referer "";
                    set $ref $arg_ref;
                    set $url $arg_url;
                    set $tohost "";
                    set $newuri "";

#                   add_header Content-Type text/plain;
                    rewrite_by_lua '
                        local url = require("socket.url")
                        local urln = ngx.var.url
                        if ngx.var.arg_ref == nil then
--                            ngx.say( " Ref is not set or null" )
--                            ngx.exit(200)
                            ngx.exit(404)
                        else
                            ngx.var.referer = ngx.decode_base64(ngx.unescape_uri( ngx.var.ref ))
                        end
                        if ngx.var.arg_url == nil then
--                            ngx.say( " Url is not set or null" )
--                            ngx.exit(200)
                            ngx.exit(404)
                        end
                        local urln = ngx.var.url
                        parsed_url = url.parse( ngx.decode_base64(ngx.unescape_uri( ngx.var.url )) )
                        if parsed_url.authority == nil then
--                            ngx.say( "Is null parsed url" )
--                            ngx.say( " decoded: " .. ngx.decode_base64(ngx.unescape_uri( ngx.var.url )))
--                            ngx.say( " arg_url: " .. urln )
--                            ngx.exit(200)
                            ngx.exit(404)
                        else
                            ngx.var.upstream = parsed_url.authority
                            ngx.var.tohost = parsed_url.host
                            ngx.var.newuri = parsed_url.path
--                          ngx.say( "Upstream: " .. ngx.var.upstream )
--                          ngx.say( "Host: " .. ngx.var.tohost )
--                          ngx.say( "Referer: " .. ngx.var.referer )
--                          ngx.say( "Uri: " .. ngx.var.newuri )
--                          if parsed_url.query == nil then
--                              ngx.say(" Args: not set")
--                              unset(ngx.var.args)
--                          else
--                              ngx.var.args = parsed_url.query
--                              ngx.say( "Args: " .. parsed_url.query )
--                          end
                        end
                    ';
                    proxy_buffering             off;
                    proxy_set_header            Host $tohost;
                    proxy_set_header            X-Forwarded-For $proxy_add_x_forwarded_for;
                    proxy_set_header            Referer $referer;
                    proxy_redirect              off;
                    proxy_connect_timeout       10;
                    proxy_send_timeout          30;
                    proxy_read_timeout          30;
                    proxy_pass                  http://$upstream/$newuri;

                }