How nginx configures websocket

this is a function that needs to be implemented, address: https://codeshelper.com/q/10., which is now solved in this way, and an error was reported in the last step.

1, this is the configuration of nginx


user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log;
pid /run/nginx.pid;

events {
    worker_connections 1024;
}

http {
    log_format  main  "$remote_addr - $remote_user [$time_local] "$request" "
                      "$status $body_bytes_sent "$http_referer" "
                      ""$http_user_agent" "$http_x_forwarded_for"";

    access_log  /var/log/nginx/access.log  main;

    sendfile            on;
    tcp_nopush          on;
    tcp_nodelay         on;
    keepalive_timeout   65;
    types_hash_max_size 2048;

    include             /etc/nginx/mime.types;
    default_type        application/octet-stream;

    -sharp Load modular configuration files from the /etc/nginx/conf.d directory.
    -sharp See http://nginx.org/en/docs/ngx_core_module.html-sharpinclude
    -sharp for more information.
    include /etc/nginx/conf.d/*.conf;

    server {
        listen       80 default_server;
        listen       [::]:80 default_server;
        server_name  _;
        root         /usr/share/nginx/html;

        -sharp Load configuration files for the default server block.
        include /etc/nginx/default.d/*.conf;

        location / {
        }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }
}

error message
clipboard.png

ask for advice on how to solve this.

Apr.10,2021

after changing the port of the server, it's okay.

clipboard.png

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