server {     resolver 114.114.114.114;  # DNS 解析 IP 地址     resolver_timeout 8s; # 超时时间     listen       9180 backlog=8192;     server_name  proxy.kisops.com;     if ($host !~ (item.taobao.com|www.ip138.com)){         return 403;     }     charset utf-8;     location / {         proxy_pass $scheme://$http_host$request_uri;          proxy_set_header Host $http_host;         proxy_set_header X-Real-IP $remote_addr;           proxy_set_header REMOTE-HOST $remote_addr;           proxy_set_header X-Forwarded-For $remote_addr;           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;          proxy_buffers 1024 8k;         proxy_max_temp_file_size 0;         proxy_headers_hash_bucket_size 512;         proxy_headers_hash_max_size 4096;         client_max_body_size 1g;         proxy_connect_timeout 30;         proxy_redirect off;           proxy_cache_valid any 0;     } }