start refactoring

utils/version/version.go

@@ -0,0 +1,88 @@
+// Copyright 2016 fatedier, fatedier@gmail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package version
+
+import (
+	"strconv"
+	"strings"
+)
+
+var version string = "0.10.0"
+
+func Full() string {
+	return version
+}
+
+func Proto(v string) int64 {
+	arr := strings.Split(v, ".")
+	if len(arr) < 3 {
+		return 0
+	}
+	res, _ := strconv.ParseInt(arr[0], 10, 64)
+	return res
+}
+
+func Major(v string) int64 {
+	arr := strings.Split(v, ".")
+	if len(arr) < 3 {
+		return 0
+	}
+	res, _ := strconv.ParseInt(arr[1], 10, 64)
+	return res
+}
+
+func Minor(v string) int64 {
+	arr := strings.Split(v, ".")
+	if len(arr) < 3 {
+		return 0
+	}
+	res, _ := strconv.ParseInt(arr[2], 10, 64)
+	return res
+}
+
+// add every case there if server will not accept client's protocol and return false
+func Compat(client string) (ok bool, msg string) {
+	if LessThan(client, version) {
+		return false, "Please upgrade your frpc version to 0.10.0"
+	}
+	return true, ""
+}
+
+func LessThan(client string, server string) bool {
+	vc := Proto(client)
+	vs := Proto(server)
+	if vc > vs {
+		return false
+	} else if vc < vs {
+		return true
+	}
+
+	vc = Major(client)
+	vs = Major(server)
+	if vc > vs {
+		return false
+	} else if vc < vs {
+		return true
+	}
+
+	vc = Minor(client)
+	vs = Minor(server)
+	if vc > vs {
+		return false
+	} else if vc < vs {
+		return true
+	}
+	return false
+}