NGinx将websocket从80转发到websocket端口

Question

我使用Nginx作为web主机和代理，在同一个设备上运行的websocket监听端口8888。尝试找到一种让nginx监听80并将websocket请求转发到内部端口的方法。而不会将新端口暴露在外部。这有可能吗？

更新：

这是我当前的配置：

error_log       /var/log/nginx/error_log.log    warn;

map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

upstream websocket {
    server localhost:8888;
}


server {
    listen 80;
    #listen [::]:80 default_server;

    # SSL configuration
    #
    # listen 443 ssl default_server;
    # listen [::]:443 ssl default_server;
    #
    # Self signed certs generated by the ssl-cert package
    # Don't use them in a production server!
    #
    # include snippets/snakeoil.conf;

    root /var/www/html/EncoderAdmin;

    # Add index.php to the list if you are using PHP
    index index.php index.html index.htm index.nginx-debian.html;

    server_name _;

    location / {
            # First attempt to serve request as file, then
            # as directory, then fall back to displaying a 404.
            try_files $uri $uri/ =404;
            auth_basic "Restricted Content";
            auth_basic_user_file /etc/nginx/.htpasswd;


    }

    location /ws {
            proxy_pass              http://localhost:8888;
            proxy_http_version      1.1;
            proxy_set_header        Host $http_host;
            proxy_set_header        X-Real-IP $remote_addr;
            proxy_set_header        Upgrade $http_upgrade;
            proxy_set_header        Connection "upgrade";
    }

}

当我尝试使用ws://address/ws连接到它时，我得到：

与'ws://address/ws‘的WebSocket连接失败:在WebSocket握手期间出错:意外响应代码: 400

Answer 1

是的，假设你能区分普通的HTTP请求和套接字请求，这是可能的。

最简单的解决方案是将套接字uri与location匹配，例如，所有对/ws的请求都将被重定向到localhost:8888，任何其他url都会被重定向到localhost:8889。下面是一个配置示例

server {
    server_name  _;

    location /ws {
        proxy_pass http://localhost:8888;
        # this magic is needed for WebSocket
        proxy_http_version  1.1;
        proxy_set_header    Upgrade $http_upgrade;
        proxy_set_header    Connection "upgrade";
        proxy_set_header    Host $http_host;
        proxy_set_header    X-Real-IP $remote_addr;
    }

    location / {
        proxy_pass http://localhost:8889;
    }
}

您还应该记得将websocket服务器绑定到localhost:8888，而不是绑定到0.0.0.0:8888。这一步是不需要的，但是有了它，原来的端口就不会暴露了！