HTTP/2 Server Push
note
Requires go1.8+
Send web assets using HTTP/2 server push
Generate a self-signed X.509 TLS certificate
1) Register a route to serve web assets
e.Static("/","static")
2) Create a handler to serve index.html and push it's dependencies
e.GET("/",func(c *echo.Context)(err error){
pusher, ok := c.Response().Writer.(http.Pusher)
if ok {
if err = pusher.Push("/app.css",nil); err !=nil{
return
}
if err = pusher.Push("/app.js",nil); err !=nil{
return
}
if err = pusher.Push("/echo.png",nil); err !=nil{
return
}
}
return c.File("index.html")
})
info
If http.Pusher is supported, web assets are pushed; otherwise, client makes separate requests to get them.
3) Start TLS server using cert.pem and key.pem
sc := echo.StartConfig{Address:":1323"}
if err := sc.StartTLS(context.Background(), e,"cert.pem","key.pem"); err !=nil{
e.Logger.Error("failed to start server","error", err)
}
or use customized HTTP server with your own TLSConfig
s := http.Server{
Addr:":8443",
Handler: e,// set Echo as handler
TLSConfig:&tls.Config{
//Certificates: nil, // <-- s.ListenAndServeTLS will populate this field
},
//ReadTimeout: 30 * time.Second, // use custom timeouts
}
if err := s.ListenAndServeTLS("cert.pem","key.pem"); err != http.ErrServerClosed {
log.Fatal(err)
}
4) Start the server and browse to https://localhost:1323
Protocol: HTTP/2.0
Host: localhost:1323
Remote Address: [::1]:60288
Method: GET
Path: /
Source Code
cookbook/http2-server-push/index.html
loading...
cookbook/http2-server-push/server.go
loading...