NGinx 将 websocket 从 80 转发到 websocket 端口

Question

我使用 Nginx 作为 web 主机和代理，用于在同一设备上运行的 websocket 侦听端口 8888。试图找到一种方法让 nginx 在 80 上侦听并将 websocket 请求转发到内部端口。无需将新端口暴露在外部。这甚至可能吗？

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：WebSocket 握手期间出错：意外响应代码：400

Answer 1

是的，假设您可以区分正常的 HTTP 请求和套接字请求是可能的。

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

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;
    }
}

您还应该记住将 websocket 服务器绑定到 localhost:8888 而不是 0.0.0.0:8888。这一步是不需要的，但是原始端口不会暴露！