add basic command framework and apiserver

pkg/api/client/transport/cancellable/canceler_go14.go

@@ -0,0 +1,27 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !go1.5
+
+package cancellable
+
+import (
+	"net/http"
+
+	"github.com/gostor/gotgt/pkg/api/client/transport"
+)
+
+type requestCanceler interface {
+	CancelRequest(*http.Request)
+}
+
+func canceler(client transport.Sender, req *http.Request) func() {
+	rc, ok := client.(requestCanceler)
+	if !ok {
+		return func() {}
+	}
+	return func() {
+		rc.CancelRequest(req)
+	}
+}