add pkgs from core

handler/http/metadata.go

@@ -0,0 +1,54 @@
+package http
+
+import (
+	"net/http"
+	"strings"
+
+	mdata "github.com/go-gost/core/metadata"
+	mdx "github.com/go-gost/x/metadata"
+)
+
+type metadata struct {
+	probeResistance *probeResistance
+	sni             bool
+	enableUDP       bool
+	header          http.Header
+}
+
+func (h *httpHandler) parseMetadata(md mdata.Metadata) error {
+	const (
+		header         = "header"
+		probeResistKey = "probeResistance"
+		knock          = "knock"
+		sni            = "sni"
+		enableUDP      = "udp"
+	)
+
+	if m := mdx.GetStringMapString(md, header); len(m) > 0 {
+		hd := http.Header{}
+		for k, v := range m {
+			hd.Add(k, v)
+		}
+		h.md.header = hd
+	}
+
+	if v := mdx.GetString(md, probeResistKey); v != "" {
+		if ss := strings.SplitN(v, ":", 2); len(ss) == 2 {
+			h.md.probeResistance = &probeResistance{
+				Type:  ss[0],
+				Value: ss[1],
+				Knock: mdx.GetString(md, knock),
+			}
+		}
+	}
+	h.md.sni = mdx.GetBool(md, sni)
+	h.md.enableUDP = mdx.GetBool(md, enableUDP)
+
+	return nil
+}
+
+type probeResistance struct {
+	Type  string
+	Value string
+	Knock string
+}