199 lines
4.7 KiB
Go
199 lines
4.7 KiB
Go
// Copyright 2024 GoEdge CDN goedge.cdn@gmail.com. All rights reserved. Official site: https://goedge.cn .
|
|
|
|
package iplibrary
|
|
|
|
import (
|
|
"fmt"
|
|
"github.com/oschwald/geoip2-golang"
|
|
"net"
|
|
"os"
|
|
"path/filepath"
|
|
"sync"
|
|
"time"
|
|
)
|
|
|
|
// MaxMindReader MaxMind GeoIP2 Reader
|
|
type MaxMindReader struct {
|
|
db *geoip2.Reader
|
|
dbASN *geoip2.Reader // ASN 数据库(可选)
|
|
meta *Meta
|
|
initialized bool
|
|
mutex sync.RWMutex
|
|
}
|
|
|
|
// NewMaxMindReader 创建 MaxMind Reader
|
|
// 参数:
|
|
// - cityDBPath: City 数据库路径(包含 Country 和 City 信息)
|
|
// - asnDBPath: ASN 数据库路径(可选,用于获取 ISP 信息)
|
|
func NewMaxMindReader(cityDBPath, asnDBPath string) (*MaxMindReader, error) {
|
|
if len(cityDBPath) == 0 {
|
|
return nil, fmt.Errorf("city database path is required")
|
|
}
|
|
|
|
// 打开 City 数据库(包含 Country 信息)
|
|
db, err := geoip2.Open(cityDBPath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("open MaxMind city database failed: %w", err)
|
|
}
|
|
|
|
reader := &MaxMindReader{
|
|
db: db,
|
|
}
|
|
|
|
// 打开 ASN 数据库(可选)
|
|
if len(asnDBPath) > 0 {
|
|
dbASN, err := geoip2.Open(asnDBPath)
|
|
if err == nil {
|
|
reader.dbASN = dbASN
|
|
}
|
|
// 如果 ASN 数据库打开失败,不影响主功能,只记录错误
|
|
}
|
|
|
|
// 初始化 Meta
|
|
reader.meta = reader.initMeta()
|
|
|
|
reader.initialized = true
|
|
|
|
return reader, nil
|
|
}
|
|
|
|
// NewMaxMindReaderFromBytes 从字节数据创建 MaxMind Reader
|
|
// 参数:
|
|
// - cityDBData: City 数据库字节数据(包含 Country 和 City 信息)
|
|
// - asnDBData: ASN 数据库字节数据(可选,用于获取 ISP 信息)
|
|
func NewMaxMindReaderFromBytes(cityDBData, asnDBData []byte) (*MaxMindReader, error) {
|
|
if len(cityDBData) == 0 {
|
|
return nil, fmt.Errorf("city database data is required")
|
|
}
|
|
|
|
// 创建临时文件,使用更唯一的文件名避免冲突
|
|
tmpDir := os.TempDir()
|
|
pid := os.Getpid()
|
|
// 使用时间戳增加唯一性,避免同一进程多次调用时的冲突
|
|
timestamp := time.Now().UnixNano()
|
|
cityTmpFile := filepath.Join(tmpDir, fmt.Sprintf("geolite2-city-%d-%d.mmdb", pid, timestamp))
|
|
asnTmpFile := filepath.Join(tmpDir, fmt.Sprintf("geolite2-asn-%d-%d.mmdb", pid, timestamp))
|
|
|
|
// 如果临时文件已存在,先删除(可能是之前崩溃留下的)
|
|
os.Remove(cityTmpFile)
|
|
os.Remove(asnTmpFile)
|
|
|
|
// 写入 City 数据库到临时文件
|
|
if err := os.WriteFile(cityTmpFile, cityDBData, 0644); err != nil {
|
|
return nil, fmt.Errorf("write city database to temp file failed: %w", err)
|
|
}
|
|
|
|
// 打开 City 数据库
|
|
db, err := geoip2.Open(cityTmpFile)
|
|
if err != nil {
|
|
os.Remove(cityTmpFile)
|
|
return nil, fmt.Errorf("open MaxMind city database failed: %w", err)
|
|
}
|
|
|
|
reader := &MaxMindReader{
|
|
db: db,
|
|
}
|
|
|
|
// 写入并打开 ASN 数据库(可选)
|
|
if len(asnDBData) > 0 {
|
|
if err := os.WriteFile(asnTmpFile, asnDBData, 0644); err == nil {
|
|
dbASN, err := geoip2.Open(asnTmpFile)
|
|
if err == nil {
|
|
reader.dbASN = dbASN
|
|
} else {
|
|
// ASN 数据库打开失败,清理临时文件但不影响主功能
|
|
os.Remove(asnTmpFile)
|
|
}
|
|
}
|
|
}
|
|
|
|
// 初始化 Meta
|
|
reader.meta = reader.initMeta()
|
|
|
|
reader.initialized = true
|
|
|
|
return reader, nil
|
|
}
|
|
|
|
// initMeta 初始化 Meta
|
|
func (this *MaxMindReader) initMeta() *Meta {
|
|
meta := &Meta{
|
|
Version: 3, // MaxMind 版本
|
|
Code: "maxmind",
|
|
Author: "MaxMind",
|
|
Countries: []*Country{},
|
|
Provinces: []*Province{},
|
|
Cities: []*City{},
|
|
Towns: []*Town{},
|
|
Providers: []*Provider{},
|
|
CreatedAt: 0,
|
|
}
|
|
meta.Init()
|
|
return meta
|
|
}
|
|
|
|
// Lookup 查询 IP 信息
|
|
func (this *MaxMindReader) Lookup(ip net.IP) *QueryResult {
|
|
if !this.initialized || this.db == nil {
|
|
return &QueryResult{}
|
|
}
|
|
|
|
this.mutex.RLock()
|
|
defer this.mutex.RUnlock()
|
|
|
|
// 查询 City 数据库
|
|
record, err := this.db.City(ip)
|
|
if err != nil {
|
|
return &QueryResult{}
|
|
}
|
|
|
|
// 构建查询结果
|
|
result := &QueryResult{
|
|
item: &maxMindItem{
|
|
Record: *record,
|
|
},
|
|
meta: this.meta,
|
|
}
|
|
|
|
// 如果有 ASN 数据库,查询 ASN 信息
|
|
if this.dbASN != nil {
|
|
asnRecord, err := this.dbASN.ASN(ip)
|
|
if err == nil {
|
|
if maxItem, ok := result.item.(*maxMindItem); ok {
|
|
maxItem.ASN = asnRecord.AutonomousSystemNumber
|
|
maxItem.ASNOrg = asnRecord.AutonomousSystemOrganization
|
|
}
|
|
}
|
|
}
|
|
|
|
return result
|
|
}
|
|
|
|
// Meta 获取 Meta 信息
|
|
func (this *MaxMindReader) Meta() *Meta {
|
|
return this.meta
|
|
}
|
|
|
|
// Destroy 销毁 Reader
|
|
func (this *MaxMindReader) Destroy() {
|
|
this.mutex.Lock()
|
|
defer this.mutex.Unlock()
|
|
|
|
if this.db != nil {
|
|
this.db.Close()
|
|
this.db = nil
|
|
}
|
|
if this.dbASN != nil {
|
|
this.dbASN.Close()
|
|
this.dbASN = nil
|
|
}
|
|
this.initialized = false
|
|
}
|
|
|
|
// maxMindItem MaxMind 查询结果项
|
|
type maxMindItem struct {
|
|
Record geoip2.City
|
|
ASN uint
|
|
ASNOrg string
|
|
}
|