解决方案，在 Nginx ，location 中添加以下红色代码：
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection
"upgrade"
;
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server {
listen
80
;
server_name localhost;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host;
proxy_set_header X-NginX-Proxy
true
;
# prevents
502
bad gateway error
proxy_buffers
8
32k;
proxy_buffer_size 64k;
proxy_pass http:
//127.0.0.1:8080;
proxy_redirect off;
# enables WS support
proxy_http_version
1.1
;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection
"upgrade"
;
}
}
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