wss协议域名访问做443端口转发为什么没用？

Question

1、Nginx设置如下

# 实际websocket服务器地址
upstream wss_svr {
    server 192.168.213.182:1234 weight=1;  
}
 
# 443 ssl端口配置，实际websockets（wss）地址
server {
 
    listen 443;
    server_name www.a.com;
        
    ssl on;
 
    # 自己的证书，放在与nginx.conf同一文件夹下。（若放不同文件夹注意路径问题）
    ssl_certificate dhxtest.crt;
    ssl_certificate_key dhxtest_nopass.key;
        
    ssl_session_timeout 5m;
    ssl_session_cache shared:SSL:10m;
    ssl_protocols TLSv1 TLSv1.1 TLSv1.2 SSLv2 SSLv3;
    ssl_ciphers ALL:!ADH:!EXPORT56:RC4+RSA:+HIGH:+MEDIUM:+LOW:+SSLv2:+EXP;
    ssl_prefer_server_ciphers on;
    ssl_verify_client off;
        
    location / {        
        proxy_redirect off;
        proxy_pass http://wss_svr;      # 转发
        proxy_set_header Host $host;
        proxy_set_header X-Real_IP $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr:$remote_port;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;   # 升级协议头
        proxy_set_header Connection upgrade;
    }
        
}

2、WebSocket连接如下

ws = new WebSocket("wss://www.a.com");
ws.onopen = function() {
    alert("连接成功");
    ws.send('tom');
    alert("给服务端发送一个字符串：tom");
};
ws.onmessage = function(e) {
    alert("收到服务端的消息：" + e.data);
};

3、如果用端口连接的话就可以 wss://www.a.com:1234

Answer 1

具体的报错信息是？

Answer 2

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