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* Add lzip support * Make the extension comparison to strict
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,53 @@ | ||
package archiver | ||
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import ( | ||
"bytes" | ||
"io" | ||
"path/filepath" | ||
"strings" | ||
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"github.com/sorairolake/lzip-go" | ||
) | ||
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func init() { | ||
RegisterFormat(Lzip{}) | ||
} | ||
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// Lzip facilitates lzip compression. | ||
type Lzip struct{} | ||
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func (Lzip) Name() string { return ".lz" } | ||
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func (lz Lzip) Match(filename string, stream io.Reader) (MatchResult, error) { | ||
var mr MatchResult | ||
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// match filename | ||
if filepath.Ext(strings.ToLower(filename)) == lz.Name() { | ||
mr.ByName = true | ||
} | ||
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// match file header | ||
buf, err := readAtMost(stream, len(lzipHeader)) | ||
if err != nil { | ||
return mr, err | ||
} | ||
mr.ByStream = bytes.Equal(buf, lzipHeader) | ||
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return mr, nil | ||
} | ||
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func (Lzip) OpenWriter(w io.Writer) (io.WriteCloser, error) { | ||
return lzip.NewWriter(w), nil | ||
} | ||
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func (Lzip) OpenReader(r io.Reader) (io.ReadCloser, error) { | ||
lzr, err := lzip.NewReader(r) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return io.NopCloser(lzr), err | ||
} | ||
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// magic number at the beginning of lzip files | ||
// https://datatracker.ietf.org/doc/html/draft-diaz-lzip-09#section-2 | ||
var lzipHeader = []byte("LZIP") |