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60 lines
1.4 KiB
60 lines
1.4 KiB
// Copyright (c) 2022 Proton AG |
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// |
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// This file is part of Proton Mail Bridge. |
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// |
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// Proton Mail Bridge is free software: you can redistribute it and/or modify |
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// it under the terms of the GNU General Public License as published by |
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// the Free Software Foundation, either version 3 of the License, or |
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// (at your option) any later version. |
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// |
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// Proton Mail Bridge is distributed in the hope that it will be useful, |
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// but WITHOUT ANY WARRANTY; without even the implied warranty of |
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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// GNU General Public License for more details. |
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// |
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// You should have received a copy of the GNU General Public License |
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// along with Proton Mail Bridge. If not, see <https://www.gnu.org/licenses/>. |
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package cache |
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import ( |
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"bytes" |
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"compress/gzip" |
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) |
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type GZipCompressor struct{} |
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func (GZipCompressor) Compress(dec []byte) ([]byte, error) { |
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buf := new(bytes.Buffer) |
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zw := gzip.NewWriter(buf) |
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if _, err := zw.Write(dec); err != nil { |
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return nil, err |
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} |
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if err := zw.Close(); err != nil { |
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return nil, err |
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} |
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return buf.Bytes(), nil |
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} |
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func (GZipCompressor) Decompress(cmp []byte) ([]byte, error) { |
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zr, err := gzip.NewReader(bytes.NewReader(cmp)) |
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if err != nil { |
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return nil, err |
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} |
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buf := new(bytes.Buffer) |
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if _, err := buf.ReadFrom(zr); err != nil { |
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return nil, err |
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} |
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if err := zr.Close(); err != nil { |
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return nil, err |
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} |
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return buf.Bytes(), nil |
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}
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