Mercurial > gemma
view pkg/misc/tmpfiles.go @ 1234:1a5564655f2a
refac: Sidebar reorganized
In order to make context switches between administrative tasks
which are map related and those which are system related, we now have
a category "administration" and "systemadministration".
The Riverbedmorphology does nothing than display the map, so it is
renamed to that (map). In case the context of "systemadministration"
is chosen, the "map" brings you just back to the map.
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Tue, 20 Nov 2018 09:54:53 +0100 |
parents | 17131f0f9fcb |
children | 5b9b8eabcd01 |
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// This is Free Software under GNU Affero General Public License v >= 3.0 // without warranty, see README.md and license for details. // // SPDX-License-Identifier: AGPL-3.0-or-later // License-Filename: LICENSES/AGPL-3.0.txt // // Copyright (C) 2018 by via donau // – Österreichische Wasserstraßen-Gesellschaft mbH // Software engineering by Intevation GmbH // // Author(s): // * Sascha L. Teichmann <sascha.teichmann@intevation.de> package misc import ( "encoding/hex" "log" "os" "path/filepath" "sort" "sync" "time" "gemma.intevation.de/gemma/pkg/common" "gemma.intevation.de/gemma/pkg/config" ) const ( tmpFilesDir = "tmpfiles" maxTmpFiles = 100 maxTmpFileAge = 45 * time.Minute tmpfilesCleanUp = 15 * time.Minute ) var tmpfilesMu sync.Mutex func init() { go func() { config.WaitReady() for { if err := cleanupTmpFiles(); err != nil { log.Printf("error: %v\n", err) } time.Sleep(tmpfilesCleanUp) } }() } func tmpfilesDir() string { dir := config.TmpDir() if dir == "" { dir = os.TempDir() } return filepath.Join(dir, tmpFilesDir) } func cleanupTmpFiles() error { tmpfilesMu.Lock() defer tmpfilesMu.Unlock() tmp := tmpfilesDir() _, err := os.Stat(tmp) switch { case os.IsNotExist(err): return nil case err != nil: return err } f, err := os.Open(tmp) if err != nil { return err } files, err := f.Readdir(-1) f.Close() if err != nil { return err } bestBefore := time.Now().Add(-maxTmpFileAge) var errs []error var deleted int for _, fi := range files { if fi.ModTime().Before(bestBefore) { fname := filepath.Join(tmp, fi.Name()) if err := os.RemoveAll(fname); err != nil { errs = append(errs, err) } else { deleted++ } } } // If empty remove temp folder. if deleted == len(files) { if err := os.RemoveAll(tmp); err != nil { errs = append(errs, err) } } if len(errs) > 0 { return common.ToError(errs) } return nil } func DeleteTempFile(token string) error { tmpfilesMu.Lock() defer tmpfilesMu.Unlock() tmp := tmpfilesDir() return os.RemoveAll(filepath.Join(tmp, token)) } func UnmakeTempFile(token, path string) error { tmpfilesMu.Lock() defer tmpfilesMu.Unlock() tmp := tmpfilesDir() return os.Rename(filepath.Join(tmp, token), path) } func MakeTempFile(fname string) (string, error) { tmpfilesMu.Lock() defer tmpfilesMu.Unlock() tmp := tmpfilesDir() _, err := os.Stat(tmp) switch { case os.IsNotExist(err): if err := os.MkdirAll(tmp, 0700); err != nil { return "", err } case err != nil: return "", err } f, err := os.Open(tmp) if err != nil { return "", err } files, err := f.Readdir(-1) f.Close() if err != nil { return "", err } // If there are too many throw away old. if len(files) >= maxTmpFiles { sort.Slice(files, func(i, j int) bool { return files[i].ModTime().Before(files[j].ModTime()) }) var errs []error for len(files) >= maxTmpFiles { fname := filepath.Join(tmp, files[0].Name()) if err := os.RemoveAll(fname); err != nil { errs = append(errs, err) } files = files[1:] } if len(errs) > 0 { return "", common.ToError(errs) } } var token string again: token = generateToken() for _, f := range files { if f.Name() == token { goto again } } err = os.Rename(fname, filepath.Join(tmp, token)) return token, err } func generateToken() string { return hex.EncodeToString(common.GenerateRandomKey(20)) }