use http/1.1 by default

http/2 is not useful for DASH video streaming.

cmd/http3-ytproxy/main.go

@@ -153,6 +153,7 @@ func main() {
 	var http_server bool = true
 	var https bool = false
 	var h3c bool = false
+	var h2c bool = false
 	var ipv6 bool = false
 	var bc bool = true
 
@@ -162,6 +163,9 @@ func main() {
 	if strings.ToLower(getenv("HTTPS")) == "true" {
 		https = true
 	}
+	if strings.ToLower(getenv("H2C")) == "true" {
+		h2c = true
+	}
 	if strings.ToLower(getenv("H3C")) == "true" {
 		h3c = true
 	}
@@ -219,9 +223,14 @@ func main() {
 	httpc.Ipv6_only = ipv6
 
 	if h3c {
+		log.Println("[INFO] Using HTTP/3 Client")
 		httpc.Client = httpc.H3client
-	} else {
+	} else if h2c {
+		log.Println("[INFO] Using HTTP/2 Client")
 		httpc.Client = httpc.H2client
+	} else {
+		log.Println("[INFO] Using HTTP/1.1 Client")
+		httpc.Client = httpc.H1_1client
 	}
 
 	if https {

internal/httpc/client.go

@@ -1,6 +1,7 @@
 package httpc
 
 import (
+	"crypto/tls"
 	"net"
 	"net/http"
 	"net/url"
@@ -25,6 +26,40 @@ var H3client = &http.Client{
 	Timeout:   10 * time.Second,
 }
 
+// http/1.1 client
+var H1_1client = &http.Client{
+	CheckRedirect: func(req *http.Request, via []*http.Request) error {
+		return http.ErrUseLastResponse
+	},
+	Transport: &http.Transport{
+		Dial: func(network, addr string) (net.Conn, error) {
+			var net string
+			if Ipv6_only {
+				net = "tcp6"
+			} else {
+				net = "tcp4"
+			}
+			return dialer.Dial(net, addr)
+		},
+		TLSHandshakeTimeout:   10 * time.Second,
+		ResponseHeaderTimeout: 20 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+		IdleConnTimeout:       30 * time.Second,
+		ReadBufferSize:        16 * 1024,
+		MaxConnsPerHost:       0,
+		MaxIdleConnsPerHost:   10,
+		MaxIdleConns:          0,
+		Proxy: func(r *http.Request) (*url.URL, error) {
+			if Proxy != "" {
+				return url.Parse(Proxy)
+			}
+			return nil, nil
+		},
+		// Prevent switching to HTTP/2
+		TLSNextProto: make(map[string]func(string, *tls.Conn) http.RoundTripper),
+	},
+}
+
 // http/2 client
 var H2client = &http.Client{
 	CheckRedirect: func(req *http.Request, via []*http.Request) error {