Did anyone tried to modify free5gc to use http2 instead of http1.1 with h2c?

abousselmi · February 4, 2022, 8:57pm

I think this is in continuity with your previous question.

Free5GC implements both h2c and h2. If we take an the example of the AUSF, you can see here:

free5gc/http2_util/blob/210de71e32434b980cefc9a708453307d4c2dd64/server.go#L20


	"time"
	"github.com/pkg/errors"
	"golang.org/x/net/http2"
	"golang.org/x/net/http2/h2c"
)
// NewServer returns a server instance with HTTP/2.0 and HTTP/2.0 cleartext support
// If this function cannot open or create the secret log file,
// **it still returns server instance** but without the secret log and error indication
func NewServer(bindAddr string, preMasterSecretLogPath string, handler http.Handler) (server *http.Server, err error) {
	if handler == nil {
		return nil, errors.New("server needs handler to handle request")
	}
	h2Server := &http2.Server{
		// TODO: extends the idle time after re-use openapi client
		IdleTimeout: 1 * time.Millisecond,
	}
	server = &http.Server{
		Addr:    bindAddr,

that it implements http, h2c and h2 servers. The code looks very much like this example:

github.com

thrawn01/h2c-golang-example/blob/cafa2960ca5df81100b61a1785b37f5ed749b87d/cmd/server/main.go#L25


	}
	fmt.Printf("ERROR: %s: %s\n", msg, err)
	os.Exit(1)
}
func main() {
	H2CServerUpgrade()
	//H2CServerPrior()
}
// This server supports "H2C upgrade" and "H2C prior knowledge" along with
// standard HTTP/2 and HTTP/1.1 that golang natively supports.
func H2CServerUpgrade() {
	h2s := &http2.Server{}
	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintf(w, "Hello, %v, http: %v", r.URL.Path, r.TLS == nil)
	})
	server := &http.Server{
		Addr:    "0.0.0.0:1010",

which states that using this implementation you will end up with a server that supports basically everything.

I hope this helps.