HTTP/2 Recipe

How to run an HTTP/2 server? 🔗

Step 1: Generate a self-signed X.509 TLS certificate 🔗

Run the following command to generate cert.pem and key.pem files:

go run $GOROOT/src/crypto/tls/generate_cert.go --host localhost

For demo purpose, we are using a self-signed certificate. Ideally, you should obtain a certificate from CA.

Step 2: Create a handler which simply outputs the request information to the client 🔗 

e.GET("/request", func(c echo.Context) error {
  req := c.Request()
  format := `
    <code>
      Protocol: %s<br>
      Host: %s<br>
      Remote Address: %s<br>
      Method: %s<br>
      Path: %s<br>
    </code>
  `
  return c.HTML(http.StatusOK, fmt.Sprintf(format, req.Proto, req.Host, req.RemoteAddr, req.Method, req.URL.Path))
})

Step 3: Start TLS server using cert.pem and key.pem 🔗 

if err := e.StartTLS(":1323", "cert.pem", "key.pem"); err != http.ErrServerClosed {
  log.Fatal(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)
}

Step 4: Start the server and browse to https://localhost:1323/request to see the following output 🔗 

Protocol: HTTP/2.0
Host: localhost:1323
Remote Address: [::1]:60288
Method: GET
Path: /

Source Code

server.go