post请求正常，PUT请求I/O error on PUT request for Connection reset

问题描述：在内网环境下, 用IP访问接口均正常。但是在外网环境中用域名访问接口，get和post请求均正常，而put和delete请求一直报错如下

org.springframework.web.client.ResourceAccessException: 
I/O error on PUT request for "报错接口！！": 
Connection reset; nested exception is java.net.SocketException: Connection reset

查了各种资料，也按要求配置了nginx，就是不行

	server {
		listen 8099;
		server_name http://aa.com;
		#index index.php index.html index.htm default.php default.htm default.html;
		gzip on;
		gzip_static on;     # 需要http_gzip_static_module 模块
		gzip_min_length 1k;
		gzip_comp_level 4;
		gzip_proxied any;
		gzip_types text/plain text/xml text/css;
		gzip_vary on;
		gzip_disable "MSIE [1-6]\.(?!.*SV1)";
		
		add_header Access-Control-Allow-Origin *;
        add_header Access-Control-Allow-Headers X-Requested-With;
        add_header Access-Control-Allow-Methods GET,PUT,POST,OPTIONS;

		# 若新增后端路由前缀注意在此处添加（|新增）
		location / {
		   proxy_pass http://aa.com/gateway;
		   proxy_connect_timeout 60s;
		   proxy_send_timeout 60s;
		   proxy_read_timeout 60s;
		   proxy_set_header X-Real-IP $remote_addr;
		   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
		   proxy_set_header X-Forwarded-Proto http;
		}
		
		# 避免端点安全问题
		if ($request_uri ~ "/actuator"){
			return 403;
		}

	}

后来了解一点内网穿透的东西,
网关层有可以设置过滤拦截, 网关服务器拦截了delete和put请求, 只允许get和post, 

所有的PUT/DELETE请求，都要求改成POST；
所有的PUT请求，要携带Header：X-HTTP-Method-Override: PUT
所有的DELETE请求，要携带Header：X-HTTP-Method-Override: DELETE
参考
Request URL: http://xxx.com/admin/log/12345
Request Method: POST

POST /admin/log/12345 HTTP/1.1
Host: 192.168.2.170:8080
Connection: keep-alive
Content-Length: 0
Accept: application/json, text/plain, */*

1

Authorization: Bearer 5542d6-5cd6-48ac-a3b2-19b3fb4d
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.77 Safari/537.36
X-HTTP-Method-Override: delete
Origin: http://192.168.1.170:8080
Accept-Encoding: gzip, deflate
Accept-Language: zh-CN,zh;q=0.9

2.服务端根据Header：X-HTTP-Method-Override，转换请求method
　 或在nginx层修改和转发，服务端不需要做任何处理即可，参考配置：

在nginx的server中添加
		set $method $request_method;
        if ($http_X_HTTP_Method_Override ~* 'DELETE') {
          set $method DELETE;
        }
		
		if ($http_X_HTTP_Method_Override ~* 'PUT') {
          set $method PUT;
        }
		
        proxy_method $method;
        
		location / { 
		......

改完重启服务, 200 OK ！！！