Add xhttp transport

transport/v2rayxhttp/http.go

@@ -0,0 +1,41 @@
+package xhttp
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/sagernet/sing-box/common/xray/net"
+	"github.com/sagernet/sing-box/common/xray/signal/done"
+)
+
+type httpSession struct {
+	uploadQueue *uploadQueue
+	// for as long as the GET request is not opened by the client, this will be
+	// open ("undone"), and the session may be expired within a certain TTL.
+	// after the client connects, this becomes "done" and the session lives as
+	// long as the GET request.
+	isFullyConnected *done.Instance
+}
+
+func parseXForwardedFor(header http.Header) []net.Address {
+	xff := header.Get("X-Forwarded-For")
+	if xff == "" {
+		return nil
+	}
+	list := strings.Split(xff, ",")
+	addrs := make([]net.Address, 0, len(list))
+	for _, proxy := range list {
+		addrs = append(addrs, net.ParseAddress(proxy))
+	}
+	return addrs
+}
+
+func isValidHTTPHost(request string, config string) bool {
+	r := strings.ToLower(request)
+	c := strings.ToLower(config)
+	if strings.Contains(r, ":") {
+		h, _, _ := net.SplitHostPort(r)
+		return h == c
+	}
+	return r == c
+}