Open opens the object for reading
(ctx context.Context, options ...fs.OpenOption)
| 57 | |
| 58 | // Open opens the object for reading |
| 59 | func (o *Object) Open(ctx context.Context, options ...fs.OpenOption) (io.ReadCloser, error) { |
| 60 | filePath := path.Join(o.fs.root, o.remote) |
| 61 | // Get direct link |
| 62 | directLink, size, err := o.fs.getDirectLink(ctx, filePath) |
| 63 | if err != nil { |
| 64 | return nil, fmt.Errorf("failed to get direct link: %w", err) |
| 65 | } |
| 66 | |
| 67 | o.size = size |
| 68 | |
| 69 | // Offset and Count for range download |
| 70 | var offset int64 |
| 71 | var count int64 |
| 72 | fs.FixRangeOption(options, o.size) |
| 73 | for _, option := range options { |
| 74 | switch x := option.(type) { |
| 75 | case *fs.RangeOption: |
| 76 | offset, count = x.Decode(o.size) |
| 77 | if count < 0 { |
| 78 | count = o.size - offset |
| 79 | } |
| 80 | case *fs.SeekOption: |
| 81 | offset = x.Offset |
| 82 | count = o.size |
| 83 | default: |
| 84 | if option.Mandatory() { |
| 85 | fs.Logf(o, "Unsupported mandatory option: %v", option) |
| 86 | } |
| 87 | } |
| 88 | } |
| 89 | |
| 90 | // Wrap the response body to handle offset and count |
| 91 | var reader io.ReadCloser |
| 92 | err = o.fs.pacer.Call(func() (bool, error) { |
| 93 | req, err := http.NewRequestWithContext(ctx, "GET", directLink, nil) |
| 94 | if err != nil { |
| 95 | return false, fmt.Errorf("failed to create download request: %w", err) |
| 96 | } |
| 97 | |
| 98 | resp, err := o.fs.client.Do(req) |
| 99 | if err != nil { |
| 100 | return shouldRetry(err), fmt.Errorf("failed to download file: %w", err) |
| 101 | } |
| 102 | |
| 103 | if resp.StatusCode != http.StatusOK { |
| 104 | defer func() { |
| 105 | if err := resp.Body.Close(); err != nil { |
| 106 | fs.Logf(nil, "Failed to close response body: %v", err) |
| 107 | } |
| 108 | }() |
| 109 | return false, fmt.Errorf("failed to download file: HTTP %d", resp.StatusCode) |
| 110 | } |
| 111 | |
| 112 | if offset > 0 { |
| 113 | _, err = io.CopyN(io.Discard, resp.Body, offset) |
| 114 | if err != nil { |
| 115 | _ = resp.Body.Close() |
| 116 | return false, fmt.Errorf("failed to skip offset: %w", err) |
nothing calls this directly
no test coverage detected