chore(blobs): generalised blob storage

lib/s3/s3.go

@@ -1,102 +0,0 @@
-// Copyright (C) 2024 The Syncthing Authors.
-//
-// This Source Code Form is subject to the terms of the Mozilla Public
-// License, v. 2.0. If a copy of the MPL was not distributed with this file,
-// You can obtain one at https://mozilla.org/MPL/2.0/.
-
-package s3
-
-import (
-	"io"
-	"time"
-
-	"github.com/aws/aws-sdk-go/aws"
-	"github.com/aws/aws-sdk-go/aws/credentials"
-	"github.com/aws/aws-sdk-go/aws/session"
-	"github.com/aws/aws-sdk-go/service/s3"
-	"github.com/aws/aws-sdk-go/service/s3/s3manager"
-)
-
-type Session struct {
-	bucket string
-	s3sess *session.Session
-}
-
-type Object = s3.Object
-
-func NewSession(endpoint, region, bucket, accessKeyID, secretKey string) (*Session, error) {
-	sess, err := session.NewSession(&aws.Config{
-		Region:           aws.String(region),
-		Endpoint:         aws.String(endpoint),
-		Credentials:      credentials.NewStaticCredentials(accessKeyID, secretKey, ""),
-		S3ForcePathStyle: aws.Bool(true),
-	})
-	if err != nil {
-		return nil, err
-	}
-	return &Session{
-		bucket: bucket,
-		s3sess: sess,
-	}, nil
-}
-
-func (s *Session) Upload(r io.Reader, key string) error {
-	uploader := s3manager.NewUploader(s.s3sess)
-	_, err := uploader.Upload(&s3manager.UploadInput{
-		Bucket: aws.String(s.bucket),
-		Key:    aws.String(key),
-		Body:   r,
-	})
-	return err
-}
-
-func (s *Session) List(fn func(*Object) bool) error {
-	svc := s3.New(s.s3sess)
-
-	opts := &s3.ListObjectsV2Input{
-		Bucket: aws.String(s.bucket),
-	}
-	for {
-		resp, err := svc.ListObjectsV2(opts)
-		if err != nil {
-			return err
-		}
-
-		for _, item := range resp.Contents {
-			if !fn(item) {
-				return nil
-			}
-		}
-
-		if resp.NextContinuationToken == nil || *resp.NextContinuationToken == "" {
-			break
-		}
-		opts.ContinuationToken = resp.NextContinuationToken
-	}
-
-	return nil
-}
-
-func (s *Session) LatestKey() (string, error) {
-	var latestKey string
-	var lastModified time.Time
-	if err := s.List(func(obj *Object) bool {
-		if latestKey == "" || obj.LastModified.After(lastModified) {
-			latestKey = *obj.Key
-			lastModified = *obj.LastModified
-		}
-		return true
-	}); err != nil {
-		return "", err
-	}
-	return latestKey, nil
-}
-
-func (s *Session) Download(w io.WriterAt, key string) error {
-	downloader := s3manager.NewDownloader(s.s3sess)
-	_, err := downloader.Download(w, &s3.GetObjectInput{
-		Bucket: aws.String(s.bucket),
-		Key:    aws.String(key),
-	})
-	return err
-}