Refacture structure proposal. (#1793)

command/session.go

@@ -0,0 +1,135 @@
+/*
+ * Minio Client, (C) 2015 Minio, Inc.
+ *
+ * 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 command
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/minio/minio/pkg/probe"
+)
+
+// migrateSession migrates all previous migration to latest.
+func migrateSession() {
+	// We no longer support sessions older than v5. They will be removed.
+	migrateSessionV5ToV6()
+
+	// Migrate V6 to V7.
+	migrateSessionV6ToV7()
+}
+
+// createSessionDir - create session directory.
+func createSessionDir() *probe.Error {
+	sessionDir, err := getSessionDir()
+	if err != nil {
+		return err.Trace()
+	}
+
+	if e := os.MkdirAll(sessionDir, 0700); e != nil {
+		return probe.NewError(e)
+	}
+	return nil
+}
+
+// getSessionDir - get session directory.
+func getSessionDir() (string, *probe.Error) {
+	configDir, err := getMcConfigDir()
+	if err != nil {
+		return "", err.Trace()
+	}
+
+	sessionDir := filepath.Join(configDir, globalSessionDir)
+	return sessionDir, nil
+}
+
+// isSessionDirExists - verify if session directory exists.
+func isSessionDirExists() bool {
+	sessionDir, err := getSessionDir()
+	fatalIf(err.Trace(), "Unable to determine session folder.")
+
+	if _, e := os.Stat(sessionDir); e != nil {
+		return false
+	}
+	return true
+}
+
+// getSessionFile - get current session file.
+func getSessionFile(sid string) (string, *probe.Error) {
+	sessionDir, err := getSessionDir()
+	if err != nil {
+		return "", err.Trace()
+	}
+
+	sessionFile := filepath.Join(sessionDir, sid+".json")
+	return sessionFile, nil
+}
+
+// isSessionExists verifies if given session exists.
+func isSessionExists(sid string) bool {
+	sessionFile, err := getSessionFile(sid)
+	fatalIf(err.Trace(sid), "Unable to determine session filename for ‘"+sid+"’.")
+
+	if _, e := os.Stat(sessionFile); e != nil {
+		return false
+	}
+
+	return true // Session exists.
+}
+
+// getSessionDataFile - get session data file for a given session.
+func getSessionDataFile(sid string) (string, *probe.Error) {
+	sessionDir, err := getSessionDir()
+	if err != nil {
+		return "", err.Trace()
+	}
+
+	sessionDataFile := filepath.Join(sessionDir, sid+".data")
+	return sessionDataFile, nil
+}
+
+// getSessionIDs - get all active sessions.
+func getSessionIDs() (sids []string) {
+	sessionDir, err := getSessionDir()
+	fatalIf(err.Trace(), "Unable to access session folder.")
+
+	sessionList, e := filepath.Glob(sessionDir + "/*.json")
+	fatalIf(probe.NewError(e), "Unable to access session folder ‘"+sessionDir+"’.")
+
+	for _, path := range sessionList {
+		sids = append(sids, strings.TrimSuffix(filepath.Base(path), ".json"))
+	}
+	return sids
+}
+
+// removeSessionFile - remove the session file, ending with .json
+func removeSessionFile(sid string) {
+	sessionFile, err := getSessionFile(sid)
+	if err != nil {
+		return
+	}
+	os.Remove(sessionFile)
+}
+
+// removeSessionDataFile - remove the session data file, ending with .data
+func removeSessionDataFile(sid string) {
+	dataFile, err := getSessionDataFile(sid)
+	if err != nil {
+		return
+	}
+	os.Remove(dataFile)
+}