Nginx实现反代任意网站

Nginx实现反代任意网站：

server {
        listen        80;
        server_name  aa.com; #改成自己的域名
        root   "/www/wwwroot/aa.com"; #改自己的服务器目录

        set $custom_host "https://www.baidu.com";
        set $custom_host3 "/";
        set $custom_host5 "/";
        if ($request_uri ~* ^\/((http|https)://(www.)?(\w+(\.)?)+)(.*?)$) {
            set $custom_host $1;

            set $custom_host3 $6;
        }
        
        if ($custom_host3 = ""){
            set $custom_host3 "/";
        }
        if ($custom_host3 = " "){
            set $custom_host3 "/";
        }
        if ($request_uri ~* ^\/((http|https)://(www.)?(\w+(\.)?)+)(.+)\?(.+)$) {
            set $custom_host3 $6;
        }
        set $custom_host2 "www.baidu.com";

        if ($request_uri ~* ^\/((http|https)://)((www.)?(\w+(\.)?)+)(.*?)$) {
            set $custom_host2 $3;
            set $custom_host5 $1;
        }
        if ($request_uri ~* ^\/((http|https)://)((www.)?(\w+(\.)?)+)$) {
            set $custom_host2 $3;
            set $custom_host5 $1;
        }
        set $current "http://";
        if ($scheme = https) {
            set $current "https://";
        }
        location / {
            rewrite /(.*)$ $custom_host3 break;
            proxy_connect_timeout 100s;
            # proxy_set_header x-forwarded-for $remote_addr;
            # proxy_set_header X-Real-IP $remote_addr;
            # proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            set $ishttp "http";
            if ($custom_host5 = https://) {
                set $ishttp "https";
            }
            proxy_ssl_server_name on;
            proxy_set_header X-Forwarded-Proto $ishttp;
            proxy_set_header Host $custom_host2;
            proxy_cache_key    $host$uri$is_args$args;
            proxy_headers_hash_max_size 512;    

            proxy_headers_hash_bucket_size 128; 
            proxy_buffer_size  64k;
            proxy_buffers   32 64k;
            proxy_busy_buffers_size 128k;
            proxy_set_header Cookie $http_cookie;
            proxy_cache_methods GET;
            proxy_cache_methods POST;
            proxy_cache_methods HEAD;
            proxy_redirect off;
            proxy_set_header  Referer           https://$custom_host2$custom_host3;
            proxy_set_header  User-Agent        $http_user_agent;
            # 防止谷歌返回压缩的内容，因为压缩的内容无法替换字符串
            proxy_set_header Accept-Encoding "";
            #proxy_connect_timeout      15000;
            proxy_send_timeout         15000;
            proxy_read_timeout         15000;
            sub_filter_types *;
            proxy_cache_valid 200 304 301 1s;
            add_header MJJCDN-Cache "$upstream_cache_status";
            # proxy_temp_file_write_size 512000k;
            resolver 8.8.8.8; #改为自己想要的DNS
            proxy_set_header Accept-Encoding "";
            sub_filter_types *;

            sub_filter_once off;
            proxy_temp_file_write_size 512000k;
            sub_filter "<head" '<base href="$current$host/$custom_host/" />\n<head';
            sub_filter 'https://' '$current$host/https://';
            sub_filter 'http://' '$current$host/https://';
            sub_filter "\"//" '"$current$host/https://';
            sub_filter '"/' '"$current$host/$custom_host/';
            sub_filter "'//" "'$current$host/https://";
            sub_filter "'/" "'$current$host/$custom_host/";
            sub_filter '"/search' '"search';
            
            sub_filter '"/images' '"images';
            sub_filter ', /images' ', images';
            sub_filter "http://$custom_host2" "$current$host/$custom_host";
            sub_filter "https://$custom_host2" "$current$host/$custom_host";
            proxy_pass $custom_host;

            # # set $request_uri "qqqq";
            # add_header Content-Type "text/plain;charset=utf-8";
            # return 200 "Your IP Address:$custom_host2</br>$request_uri";
        }

}