fix proxy protocol

handler/http/handler.go

@@ -21,6 +21,7 @@ import (
 	"github.com/go-gost/core/logger"
 	md "github.com/go-gost/core/metadata"
 	netpkg "github.com/go-gost/x/internal/net"
+	sx "github.com/go-gost/x/internal/util/selector"
 	"github.com/go-gost/x/registry"
 )
 
@@ -177,6 +178,11 @@ func (h *httpHandler) handleRequest(ctx context.Context, conn net.Conn, req *htt
 
 	req.Header.Del("Proxy-Authorization")
 
+	switch h.md.hash {
+	case "host":
+		ctx = sx.ContextWithHash(ctx, &sx.Hash{Source: addr})
+	}
+
 	cc, err := h.router.Dial(ctx, network, addr)
 	if err != nil {
 		resp.StatusCode = http.StatusServiceUnavailable

handler/http/metadata.go

@@ -12,6 +12,7 @@ type metadata struct {
 	probeResistance *probeResistance
 	enableUDP       bool
 	header          http.Header
+	hash            string
 }
 
 func (h *httpHandler) parseMetadata(md mdata.Metadata) error {
@@ -21,6 +22,7 @@ func (h *httpHandler) parseMetadata(md mdata.Metadata) error {
 		probeResistKeyX = "probe_resist"
 		knock           = "knock"
 		enableUDP       = "udp"
+		hash            = "hash"
 	)
 
 	if m := mdutil.GetStringMapString(md, header); len(m) > 0 {
@@ -45,6 +47,7 @@ func (h *httpHandler) parseMetadata(md mdata.Metadata) error {
 		}
 	}
 	h.md.enableUDP = mdutil.GetBool(md, enableUDP)
+	h.md.hash = mdutil.GetString(md, hash)
 
 	return nil
 }