mirror of
https://github.com/octoleo/syncthing.git
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102 lines
2.2 KiB
Go
102 lines
2.2 KiB
Go
// Copyright (C) 2024 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package s3
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import (
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"io"
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"time"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/aws/credentials"
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"github.com/aws/aws-sdk-go/aws/session"
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"github.com/aws/aws-sdk-go/service/s3"
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"github.com/aws/aws-sdk-go/service/s3/s3manager"
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)
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type Session struct {
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bucket string
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s3sess *session.Session
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}
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type Object = s3.Object
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func NewSession(endpoint, region, bucket, accessKeyID, secretKey string) (*Session, error) {
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sess, err := session.NewSession(&aws.Config{
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Region: aws.String(region),
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Endpoint: aws.String(endpoint),
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Credentials: credentials.NewStaticCredentials(accessKeyID, secretKey, ""),
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})
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if err != nil {
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return nil, err
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}
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return &Session{
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bucket: bucket,
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s3sess: sess,
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}, nil
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}
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func (s *Session) Upload(r io.Reader, key string) error {
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uploader := s3manager.NewUploader(s.s3sess)
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_, err := uploader.Upload(&s3manager.UploadInput{
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Bucket: aws.String(s.bucket),
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Key: aws.String(key),
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Body: r,
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})
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return err
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}
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func (s *Session) List(fn func(*Object) bool) error {
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svc := s3.New(s.s3sess)
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opts := &s3.ListObjectsV2Input{
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Bucket: aws.String(s.bucket),
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}
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for {
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resp, err := svc.ListObjectsV2(opts)
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if err != nil {
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return err
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}
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for _, item := range resp.Contents {
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if !fn(item) {
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return nil
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}
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}
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if resp.NextContinuationToken == nil || *resp.NextContinuationToken == "" {
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break
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}
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opts.ContinuationToken = resp.NextContinuationToken
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}
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return nil
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}
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func (s *Session) LatestKey() (string, error) {
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var latestKey string
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var lastModified time.Time
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if err := s.List(func(obj *Object) bool {
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if latestKey == "" || obj.LastModified.After(lastModified) {
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latestKey = *obj.Key
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lastModified = *obj.LastModified
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}
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return true
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}); err != nil {
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return "", err
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}
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return latestKey, nil
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}
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func (s *Session) Download(w io.WriterAt, key string) error {
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downloader := s3manager.NewDownloader(s.s3sess)
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_, err := downloader.Download(w, &s3.GetObjectInput{
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Bucket: aws.String(s.bucket),
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Key: aws.String(key),
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})
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return err
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}
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