WebSocket配置与测试

WebSocket与HTTP协议的区别

• HTTP协议只能由客户端发出请求，服务端返回消息
• WebSocket协议则可以服务器主动向客户端推送消息，双向平等对话，全双工通信

WebSocket特点

websocket介绍-CSDN

• 建议在TCP协议之上
• 默认80和443端口，握手阶段采用HTTP协议，能够通过HTTP代理服务器
• 没有同源限制，客户端可与任意服务器通信
• 协议标识符是ws，（加密则为wss）

nginx配置与验证

命令验证websocket 验证websocket

• 配置

  server {
      listen 80;
      server_name  abc.abc.com;
      
      location ^~ /ws/interaction {
        rewrite /ws/interaction/(.*) /$1 break;
          proxy_connect_timeout 10s;
          proxy_read_timeout 3600s;
          proxy_send_timeout 12s;
          # 关键配置项，设置header的Upgrade、Connection
          proxy_set_header Upgrade $http_upgrade;
          proxy_set_header Connection "upgrade";
          proxy_pass   http://192.168.1.119:8999;
      }
  }
  

• 验证

  # install 
  npm install -g wscat
  
  # use
  wscat -c "ws://abc.abc.com/ws/interaction"
  

ingerss配置与测试

kubernetes-ingress-websocket

• 配置

  apiVersion: extensions/v1beta1
  kind: Ingress
  metadata:
    name: interactive-ingress-test
    namespace: test-crm
    annotations:
      kubernetes.io/ingress.class: nginx 
      nginx.ingress.kubernetes.io/proxy-body-size: 200m
      # 支持websocket操作
      nginx.org/websocket-services: "ws-web-test"
      nginx.ingress.kubernetes.io/configuration-snippet: |
        proxy_set_header zone test;
        rewrite /ws/interaction/(.*) /$1 break;
  spec:
    rules:
    - host: abc.abc.com
      http:
        paths:
        - path: /ws/interaction
          backend:
            serviceName: ws-web-test
            servicePort: tcp8999
  

• 验证

  # kubectl get svc -n ingress-nginx
  NAME            TYPE       CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
  ingress-nginx   NodePort   172.16.255.225   <none>        80:30080/TCP,443:30106/TCP   158d
  
  使用容器ip
  # wscat  -H 'Host:abc.abc.com'  -c 'ws://172.16.255.225/ws/interaction'
  使用外网ip
  # wscat  -H 'Host:abc.abc.com'  -c 'ws://11.11.111.111/ws/interaction'
  

• 注意

  若访问ingress返回404，则可能访问配置rewrite导致