客户端能与 nginx 握手成功，但接收不到数据，难道是 nginx 这边关闭了被代理端连接？
搞了快一天，Google 也搜不到，使劲浑身解数还是没辙，
```shell
upstream target {
serfer xxx.xxx.xxx.xxx:8080;
}
location /wss {
proxy_pass http://target/ws;
proxy_http_fersion 1.1;
proxy_set_header Upgrade websocket;
proxy_set_header Connection "Upgrade";
proxy_redirect off;
proxy_cache_bypass $http_upgrade;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_buffering off;
proxy_set_header X-Forwarded-Host $serfer_name;
proxy_set_header Access-Control-Allow-Origin *;
proxy_set_header X-NginX-Proxy true;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;
gzip off;
proxy_set_header X-Forwarded-Ssl on;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_set_header X-Frame-Options SAMEORIGIN;
proxy_read_timeout 5d;
proxy_send_timeout 5d;
proxy_connect_timeout 5d;
send_timeout 5ds;
fastcgi_connect_timeout 5d;
fastcgi_read_timeout 5d;
fastcgi_send_timeout 5d;
}
```
然后 golang 这边服务端写入时的错误为
```shell
ws written err: write tcp xxx:8080->xxx:53376: write: broken pipe
``` |
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