| 1 | package storage |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "errors" |
| 7 | "io" |
| 8 | |
| 9 | "github.com/aws/aws-sdk-go-v2/aws" |
| 10 | awsconfig "github.com/aws/aws-sdk-go-v2/config" |
| 11 | "github.com/aws/aws-sdk-go-v2/service/s3" |
| 12 | "github.com/aws/aws-sdk-go-v2/service/s3/types" |
| 13 | |
| 14 | "example.com/curator/internal/config" |
| 15 | "example.com/curator/internal/metrics" |
| 16 | ) |
| 17 | |
| 18 | type S3Storage struct { |
| 19 | client *s3.Client |
| 20 | bucket string |
| 21 | } |
| 22 | |
| 23 | func NewS3Storage(ctx context.Context, cfg config.S3Config) (*S3Storage, error) { |
| 24 | opts := []func(*awsconfig.LoadOptions) error{ |
| 25 | awsconfig.WithRegion(cfg.Region), |
| 26 | } |
| 27 | |
| 28 | awsCfg, err := awsconfig.LoadDefaultConfig(ctx, opts...) |
| 29 | if err != nil { |
| 30 | return nil, err |
| 31 | } |
| 32 | |
| 33 | client := s3.NewFromConfig(awsCfg, func(o *s3.Options) { |
| 34 | if cfg.Endpoint != "" { |
| 35 | o.BaseEndpoint = aws.String(cfg.Endpoint) |
| 36 | } |
| 37 | o.UsePathStyle = cfg.UsePathStyle |
| 38 | }) |
| 39 | |
| 40 | return &S3Storage{client: client, bucket: cfg.Bucket}, nil |
| 41 | } |
| 42 | |
| 43 | func (s *S3Storage) Get(ctx context.Context, key string) ([]byte, string, error) { |
| 44 | out, err := s.client.GetObject(ctx, &s3.GetObjectInput{ |
| 45 | Bucket: &s.bucket, |
| 46 | Key: &key, |
| 47 | }) |
| 48 | if err != nil { |
| 49 | var noKey *types.NoSuchKey |
| 50 | if errors.As(err, &noKey) { |
| 51 | metrics.S3OperationsTotal.WithLabelValues("get", "miss").Inc() |
| 52 | return nil, "", ErrNotFound |
| 53 | } |
| 54 | |
| 55 | metrics.S3OperationsTotal.WithLabelValues("get", "error").Inc() |
| 56 | return nil, "", err |
| 57 | } |
| 58 | defer out.Body.Close() |
| 59 | |
| 60 | data, err := io.ReadAll(out.Body) |
| 61 | if err != nil { |
| 62 | metrics.S3OperationsTotal.WithLabelValues("get", "error").Inc() |
| 63 | return nil, "", err |
| 64 | } |
| 65 | |
| 66 | ct := "" |
| 67 | if out.ContentType != nil { |
| 68 | ct = *out.ContentType |
| 69 | } |
| 70 | |
| 71 | metrics.S3OperationsTotal.WithLabelValues("get", "hit").Inc() |
| 72 | return data, ct, nil |
| 73 | } |
| 74 | |
| 75 | func (s *S3Storage) Put(ctx context.Context, key string, data []byte, contentType string) error { |
| 76 | input := &s3.PutObjectInput{ |
| 77 | Bucket: &s.bucket, |
| 78 | Key: &key, |
| 79 | Body: bytes.NewReader(data), |
| 80 | } |
| 81 | |
| 82 | if contentType != "" { |
| 83 | input.ContentType = &contentType |
| 84 | } |
| 85 | |
| 86 | _, err := s.client.PutObject(ctx, input) |
| 87 | if err != nil { |
| 88 | metrics.S3OperationsTotal.WithLabelValues("put", "error").Inc() |
| 89 | return err |
| 90 | } |
| 91 | |
| 92 | metrics.S3OperationsTotal.WithLabelValues("put", "ok").Inc() |
| 93 | return nil |
| 94 | } |
| 95 | |
| 96 | func (s *S3Storage) BucketStats(ctx context.Context) (objects int64, sizeBytes int64, err error) { |
| 97 | paginator := s3.NewListObjectsV2Paginator(s.client, &s3.ListObjectsV2Input{ |
| 98 | Bucket: &s.bucket, |
| 99 | }) |
| 100 | |
| 101 | for paginator.HasMorePages() { |
| 102 | page, err := paginator.NextPage(ctx) |
| 103 | if err != nil { |
| 104 | return 0, 0, err |
| 105 | } |
| 106 | |
| 107 | for _, obj := range page.Contents { |
| 108 | objects++ |
| 109 | if obj.Size != nil { |
| 110 | sizeBytes += *obj.Size |
| 111 | } |
| 112 | } |
| 113 | } |
| 114 | |
| 115 | return objects, sizeBytes, nil |
| 116 | } |
| 117 | |