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reader_file.go
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/
reader_file.go
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// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
package iplibrary
import (
"bytes"
"compress/gzip"
"fmt"
"io"
"net"
"os"
"path/filepath"
"strings"
)
type FileReader struct {
rawReader ReaderInterface
//password string
}
func NewFileReader(path string, password string) (*FileReader, error) {
fp, err := os.Open(path)
if err != nil {
return nil, err
}
defer func() {
_ = fp.Close()
}()
var version = ReaderVersionV1
if strings.HasSuffix(filepath.Base(path), ".v2.db") {
version = ReaderVersionV2
}
return NewFileDataReader(fp, password, version)
}
func NewFileDataReader(dataReader io.Reader, password string, readerVersion ReaderVersion) (*FileReader, error) {
if len(password) > 0 {
data, err := io.ReadAll(dataReader)
if err != nil {
return nil, err
}
sourceData, err := NewEncrypt().Decode(data, password)
if err != nil {
return nil, err
}
dataReader = bytes.NewReader(sourceData)
}
gzReader, err := gzip.NewReader(dataReader)
if err != nil {
return nil, fmt.Errorf("create gzip reader failed: %w", err)
}
var reader ReaderInterface
if readerVersion == ReaderVersionV2 {
reader, err = NewReaderV2(gzReader)
} else {
reader, err = NewReaderV1(gzReader)
}
if err != nil {
return nil, err
}
return &FileReader{
rawReader: reader,
}, nil
}
func (this *FileReader) Meta() *Meta {
return this.rawReader.Meta()
}
func (this *FileReader) Lookup(ip net.IP) *QueryResult {
return this.rawReader.Lookup(ip)
}
func (this *FileReader) RawReader() ReaderInterface {
return this.rawReader
}