之前讲解过两种升级方式和原理

go
package ws 
  
 import ( 
         "github.com/gorilla/websocket" 
         "net/http" 
 ) 
  
 var upgrade = websocket.Upgrader{ 
         ReadBufferSize:  1024, 
         WriteBufferSize: 1024, 
         CheckOrigin: func(r *http.Request) bool { 
                 return true 
         }, 
 } 
  
 var ( 
         Websocket *websocket.Conn 
         err       error 
 ) 
  
 func App(w http.ResponseWriter, r *http.Request) (*websocket.Conn, error) { 
         Websocket, err = upgrade.Upgrade(w, r, nil) 
         return Websocket, err 
 }