nghttp2

nghttp2 is libnghttp2 binding for golang

see doc here

server usage example:

cert, err := tls.LoadX509KeyPair("testdata/server.crt", "testdata/server.key")
if err != nil {
	log.Fatal(err)
}

l, err := tls.Listen("tcp", "127.0.0.1:1100", &tls.Config{
	Certificates: []tls.Certificate{cert},
	NextProtos:   []string{"h2"},
})
if err != nil {
	log.Fatal(err)
}
defer l.Close()
addr := l.Addr().String()

http.HandleFunc("/test", func(w http.ResponseWriter, r *http.Request) {
	f("%+v", r)
	hdr := w.Header()
	hdr.Set("content-type", "text/plain")
	hdr.Set("aa", "bb")
	d, err := ioutil.ReadAll(r.Body)
	if err != nil {
		log.Println(err)
		return
	}
	w.Write(d)
})

for {
	c, err := l.Accept()
	if err != nil {
		break
	}
	h2conn, err := NewServerConn(c, nil)
	if err != nil {
		log.Fatal(err)
	}
	f("%+v", h2conn)
	go h2conn.Run()
}

client usage example:

conn, err := tls.Dial("tcp", "nghttp2.org:443", &tls.Config{
    NextProtos: []string{"h2"},
    ServerName: "nghttp2.org",
})
if err != nil {
    log.Fatal(err)
}
defer conn.Close()

cstate := conn.ConnectionState()
if cstate.NegotiatedProtocol != "h2" {
    log.Fatal("no http2 on server")
}

h2conn, err := NewClientConn(conn)
if err != nil {
    log.Fatal(err)
}

param := url.Values{}
param.Add("e", "b")
param.Add("f", "d")
data := bytes.NewReader([]byte(param.Encode()))
req, _ := http.NewRequest("POST",
    "https://nghttp2.org/httpbin/post?a=b&c=d",
    data)

log.Printf("%+v", req)

req.Header.Set("user-agent", "go-nghttp2/1.0")
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")

res, err := h2conn.CreateRequest(req)
if err != nil {
    log.Fatal(err)
}

if res.StatusCode != http.StatusOK {
    log.Printf("expect %d, got %d", http.StatusOK, res.StatusCode)
}
res.Write(os.Stderr)

co-work with net/http server example:

l, err := net.Listen("tcp", "127.0.0.1:1222")
if err != nil {
    log.Fatal(err)
}
srv := &http.Server{
    TLSConfig: &tls.Config{
        NextProtos: []string{"h2", "http/1.1"},
    },
    TLSNextProto: map[string]func(*http.Server, *tls.Conn, http.Handler){
        "h2": nghttp2.HTTP2Handler,
    },
}
defer srv.Close()

srv.ServeTLS(l, "testdata/server.crt", "testdata/server.key")

see http2_test.go for more details