新版IP库管理阶段性提交（未完成）

pkg/iplibrary/reader_file.go

@@ -0,0 +1,41 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved. Official site: https://goedge.cn .
+
+package iplibrary
+
+import (
+	"compress/gzip"
+	"net"
+	"os"
+)
+
+type FileReader struct {
+	rawReader *Reader
+}
+
+func NewFileReader(path string) (*FileReader, error) {
+	fp, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer func() {
+		_ = fp.Close()
+	}()
+
+	gzReader, err := gzip.NewReader(fp)
+	if err != nil {
+		return nil, err
+	}
+
+	reader, err := NewReader(gzReader)
+	if err != nil {
+		return nil, err
+	}
+
+	return &FileReader{
+		rawReader: reader,
+	}, nil
+}
+
+func (this *FileReader) Lookup(ip net.IP) *QueryResult {
+	return this.rawReader.Lookup(ip)
+}