/
share-db-v1.go
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/
share-db-v1.go
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// Copyright (c) 2015-2022 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package cmd
import (
"os"
"sync"
"time"
"github.com/kirolous/mc/pkg/probe"
"github.com/minio/pkg/quick"
)
// shareEntryV1 - container for each download/upload entries.
type shareEntryV1 struct {
URL string `json:"share"` // Object URL.
VersionID string `json:"versionID"`
Date time.Time `json:"date"`
Expiry time.Duration `json:"expiry"`
ContentType string `json:"contentType,omitempty"` // Only used by upload cmd.
}
// JSON file to persist previously shared uploads.
type shareDBV1 struct {
Version string `json:"version"`
mutex *sync.Mutex
// key is unique share URL.
Shares map[string]shareEntryV1 `json:"shares"`
}
// Instantiate a new uploads structure for persistence.
func newShareDBV1() *shareDBV1 {
s := &shareDBV1{
Version: "1",
}
s.Shares = make(map[string]shareEntryV1)
s.mutex = &sync.Mutex{}
return s
}
// Set upload info for each share.
func (s *shareDBV1) Set(objectURL string, shareURL string, expiry time.Duration, contentType string) {
s.mutex.Lock()
defer s.mutex.Unlock()
s.Shares[shareURL] = shareEntryV1{
URL: objectURL,
Date: UTCNow(),
Expiry: expiry,
ContentType: contentType,
}
}
// Delete upload info if it exists.
func (s *shareDBV1) Delete(objectURL string) {
s.mutex.Lock()
defer s.mutex.Unlock()
delete(s.Shares, objectURL)
}
// Delete all expired uploads.
func (s *shareDBV1) deleteAllExpired() {
for shareURL, share := range s.Shares {
if (share.Expiry - time.Since(share.Date)) <= 0 {
// Expired entry. Safe to drop.
delete(s.Shares, shareURL)
}
}
}
// Load shareDB entries from disk. Any entries held in memory are reset.
func (s *shareDBV1) Load(filename string) *probe.Error {
s.mutex.Lock()
defer s.mutex.Unlock()
// Check if the db file exist.
if _, e := os.Stat(filename); e != nil {
return probe.NewError(e)
}
// Initialize and load using quick package.
qs, e := quick.NewConfig(newShareDBV1(), nil)
if e != nil {
return probe.NewError(e).Trace(filename)
}
e = qs.Load(filename)
if e != nil {
return probe.NewError(e).Trace(filename)
}
// Copy map over.
for k, v := range qs.Data().(*shareDBV1).Shares {
s.Shares[k] = v
}
// Filter out expired entries and save changes back to disk.
s.deleteAllExpired()
s.save(filename)
return nil
}
// Persist share uploads to disk.
func (s shareDBV1) save(filename string) *probe.Error {
// Initialize a new quick file.
qs, e := quick.NewConfig(s, nil)
if e != nil {
return probe.NewError(e).Trace(filename)
}
if e := qs.Save(filename); e != nil {
return probe.NewError(e).Trace(filename)
}
return nil
}
// Persist share uploads to disk.
func (s shareDBV1) Save(filename string) *probe.Error {
s.mutex.Lock()
defer s.mutex.Unlock()
return s.save(filename)
}