forked from minio/mc
/
session-main.go
192 lines (169 loc) · 4.84 KB
/
session-main.go
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/*
* 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 main
import (
"os"
"sort"
"strings"
"github.com/minio/cli"
"github.com/minio/mc/pkg/console"
"github.com/minio/minio/pkg/iodine"
)
// Help message.
var sessionCmd = cli.Command{
Name: "session",
Usage: "Manage sessions for cp and sync",
Action: runSessionCmd,
CustomHelpTemplate: `NAME:
mc {{.Name}} - {{.Usage}}
USAGE:
mc {{.Name}}{{if .Flags}} [ARGS...]{{end}} [SESSION] {{if .Description}}
DESCRIPTION:
{{.Description}}{{end}}{{if .Flags}}
FLAGS:
{{range .Flags}}{{.}}
{{end}}{{ end }}
EXAMPLES:
1. List sessions
$ mc {{.Name}} list
2. Resume session
$ mc {{.Name}} resume [SESSION]
3. Clear session
$ mc {{.Name}} clear [SESSION]|[all]
`,
}
// bySessionWhen is a type for sorting session metadata by time
type bySessionWhen []*sessionV2
func (b bySessionWhen) Len() int { return len(b) }
func (b bySessionWhen) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
func (b bySessionWhen) Less(i, j int) bool { return b[i].Header.When.Before(b[j].Header.When) }
func listSessions() error {
var bySessions []*sessionV2
for _, sid := range getSessionIDs() {
s, err := loadSessionV2(sid)
if err != nil {
return NewIodine(iodine.New(err, nil))
}
bySessions = append(bySessions, s)
}
// sort sessions based on time
sort.Sort(bySessionWhen(bySessions))
for _, session := range bySessions {
console.Print(session)
}
return nil
}
func clearSession(sid string) {
if sid == "all" {
for _, sid := range getSessionIDs() {
session, err := loadSessionV2(sid)
if err != nil {
console.Fatalf("Unable to load session ‘%s’, %s", sid, NewIodine(iodine.New(err, nil)))
}
session.Delete()
}
return
}
if !isSession(sid) {
console.Fatalf("Session ‘%s’ not found.\n", sid)
}
session, err := loadSessionV2(sid)
if err != nil {
console.Fatalf("Unable to load session ‘%s’, %s", sid, NewIodine(iodine.New(err, nil)))
}
if session != nil {
session.Delete()
}
}
func sessionExecute(s *sessionV2) {
switch s.Header.CommandType {
case "cp":
doCopyCmdSession(s)
case "cast":
doCastCmdSession(s)
}
}
func runSessionCmd(ctx *cli.Context) {
if len(ctx.Args()) < 1 || ctx.Args().First() == "help" {
cli.ShowCommandHelpAndExit(ctx, "session", 1) // last argument is exit code
}
if strings.TrimSpace(ctx.Args().First()) == "" {
cli.ShowCommandHelpAndExit(ctx, "session", 1) // last argument is exit code
}
if !isSessionDirExists() {
if err := createSessionDir(); err != nil {
console.Fatalf("Unable to create session folder. %s\n", err)
}
}
switch strings.TrimSpace(ctx.Args().First()) {
// list resumable sessions
case "list":
err := listSessions()
if err != nil {
console.Fatalln(err)
}
case "resume":
if len(ctx.Args().Tail()) != 1 {
cli.ShowCommandHelpAndExit(ctx, "session", 1) // last argument is exit code
}
if strings.TrimSpace(ctx.Args().Tail().First()) == "" {
cli.ShowCommandHelpAndExit(ctx, "session", 1) // last argument is exit code
}
sid := strings.TrimSpace(ctx.Args().Tail().First())
_, err := os.Stat(getSessionFile(sid))
if err != nil {
console.Fatalln(errInvalidSessionID{id: sid})
}
s, err := loadSessionV2(sid)
if err != nil {
console.Fatalln(errInvalidSessionID{id: sid})
}
// extra check for testing purposes
if s == nil {
return
}
savedCwd, err := os.Getwd()
if err != nil {
console.Fatalln("Unable to verify your current working folder. %s\n", err)
}
if s.Header.RootPath != "" {
// chdir to RootPath
os.Chdir(s.Header.RootPath)
}
sessionExecute(s)
err = s.Close()
if err != nil {
console.Fatalf("Unable to close session file properly. %s\n", err)
}
err = s.Delete()
if err != nil {
console.Fatalf("Unable to clear session files properly. %s\n", err)
}
// change dir back
os.Chdir(savedCwd)
// purge a requested pending session, if "*" purge everything
case "clear":
if len(ctx.Args().Tail()) != 1 {
cli.ShowCommandHelpAndExit(ctx, "session", 1) // last argument is exit code
}
if strings.TrimSpace(ctx.Args().Tail().First()) == "" {
cli.ShowCommandHelpAndExit(ctx, "session", 1) // last argument is exit code
}
clearSession(strings.TrimSpace(ctx.Args().Tail().First()))
default:
cli.ShowCommandHelpAndExit(ctx, "session", 1) // last argument is exit code
}
}