this seems okay

server/proxy.go

@@ -0,0 +1,29 @@
+package server
+
+import (
+	"local/rproxy3/storage/packable"
+	"log"
+	"net/http"
+	"net/http/httputil"
+	"net/url"
+	"strings"
+)
+
+func (s *Server) Proxy(w http.ResponseWriter, r *http.Request) {
+	newURL, err := s.lookup(r.Host)
+	if err != nil {
+		http.NotFound(w, r)
+		log.Printf("unknown host lookup %q", r.Host)
+		return
+	}
+	r.Host = newURL.Host
+	proxy := httputil.NewSingleHostReverseProxy(newURL)
+	proxy.ServeHTTP(w, r)
+}
+
+func (s *Server) lookup(host string) (*url.URL, error) {
+	host = strings.Split(host, ".")[0]
+	v := packable.NewURL()
+	err := s.db.Get(nsRouting, host, v)
+	return v.URL(), err
+}