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47 lines
1.1 KiB
47 lines
1.1 KiB
1 year ago
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package msggateway
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import (
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"bytes"
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"compress/gzip"
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"io"
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"github.com/OpenIMSDK/Open-IM-Server/pkg/utils"
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)
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type Compressor interface {
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Compress(rawData []byte) ([]byte, error)
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DeCompress(compressedData []byte) ([]byte, error)
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}
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type GzipCompressor struct {
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compressProtocol string
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}
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func NewGzipCompressor() *GzipCompressor {
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return &GzipCompressor{compressProtocol: "gzip"}
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}
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func (g *GzipCompressor) Compress(rawData []byte) ([]byte, error) {
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gzipBuffer := bytes.Buffer{}
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gz := gzip.NewWriter(&gzipBuffer)
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if _, err := gz.Write(rawData); err != nil {
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return nil, utils.Wrap(err, "")
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}
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if err := gz.Close(); err != nil {
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return nil, utils.Wrap(err, "")
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}
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return gzipBuffer.Bytes(), nil
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}
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func (g *GzipCompressor) DeCompress(compressedData []byte) ([]byte, error) {
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buff := bytes.NewBuffer(compressedData)
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reader, err := gzip.NewReader(buff)
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if err != nil {
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return nil, utils.Wrap(err, "NewReader failed")
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}
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compressedData, err = io.ReadAll(reader)
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if err != nil {
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return nil, utils.Wrap(err, "ReadAll failed")
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}
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_ = reader.Close()
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return compressedData, nil
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}
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