/
share-db-v1.go
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/
share-db-v1.go
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/*
* Minio Client (C) 2014, 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"
"sync"
"time"
"github.com/minio/minio-xl/pkg/probe"
"github.com/minio/minio-xl/pkg/quick"
)
// shareEntryV1 - container for each download/upload entries.
type shareEntryV1 struct {
URL string `json:"share"` // Object URL.
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: time.Now().UTC(),
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 _, err := os.Stat(filename); err != nil {
return probe.NewError(err)
}
// Initialize and load using quick package.
qs, err := quick.New(newShareDBV1())
if err != nil {
return err.Trace(filename)
}
err = qs.Load(filename)
if err != nil {
return err.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, err := quick.New(s)
if err != nil {
return err.Trace(filename)
}
return qs.Save(filename).Trace(filename)
}
// Persist share uploads to disk.
func (s shareDBV1) Save(filename string) *probe.Error {
s.mutex.Lock()
defer s.mutex.Unlock()
return s.save(filename)
}