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ip2region_private
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Format golang binding

This commit is contained in:
wangsong 2021-09-09 11:26:36 +08:00
parent f92bcf3170
commit 549510a52c
2 changed files with 86 additions and 132 deletions
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212
binding/golang/ip2region/ip2Region.go
View File

@ -1,11 +1,13 @@
package ip2region
import (
"encoding/binary"
"errors"
"fmt"
"io/ioutil"
"net"
"os"
"strings"
"strconv"
"io/ioutil"
"errors"
)
const (
@ -13,19 +15,14 @@ const (
TOTAL_HEADER_LENGTH = 8192
)
var err error
var ipInfo IpInfo
type Ip2Region struct {
// db file handler
dbFileHandler *os.File
//header block info
headerSip []int64
headerPtr []int64
headerLen int64
headerSip []int64
headerPtr []int64
headerLen int64
// super block index info
firstIndexPtr int64
@ -34,9 +31,8 @@ type Ip2Region struct {
// for memory mode only
// the original db binary string
dbBinStr []byte
dbFile string
dbBinStr []byte
dbFile string
}
type IpInfo struct {
@ -48,40 +44,36 @@ type IpInfo struct {
ISP string
}
func (ip IpInfo)String() string {
return strconv.FormatInt(ip.CityId, 10) + "|" + ip.Country + "|" + ip.Region + "|" + ip.Province + "|" + ip.City + "|" + ip.ISP
func (ip IpInfo) String() string {
return fmt.Sprintf("%d|%s|%s|%s|%s|%s", ip.CityId, ip.Country, ip.Region, ip.Province, ip.City, ip.ISP)
}
func getIpInfo(cityId int64, line []byte) IpInfo {
lineSlice := strings.Split(string(line), "|")
ipInfo := IpInfo{}
length := len(lineSlice)
ipInfo.CityId = cityId
if length < 5 {
for i := 0; i <= 5 - length; i++ {
for i := 0; i <= 5-length; i++ {
lineSlice = append(lineSlice, "")
}
}
ipInfo.Country = lineSlice[0]
ipInfo.Region = lineSlice[1]
ipInfo.Province = lineSlice[2]
ipInfo.City = lineSlice[3]
ipInfo.ISP = lineSlice[4]
return ipInfo
return IpInfo{
CityId: cityId,
Country: lineSlice[0],
Region: lineSlice[1],
Province: lineSlice[2],
City: lineSlice[3],
ISP: lineSlice[4],
}
}
func New(path string) (*Ip2Region, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
return &Ip2Region{
dbFile:path,
dbFileHandler:file,
dbFile: path,
dbFileHandler: file,
}, nil
}
@ -91,56 +83,50 @@ func (this *Ip2Region) Close() {
func (this *Ip2Region) MemorySearch(ipStr string) (ipInfo IpInfo, err error) {
ipInfo = IpInfo{}
if this.totalBlocks == 0 {
this.dbBinStr, err = ioutil.ReadFile(this.dbFile)
if err != nil {
return ipInfo, err
}
this.firstIndexPtr = getLong(this.dbBinStr, 0)
this.lastIndexPtr = getLong(this.dbBinStr, 4)
this.totalBlocks = (this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH + 1
this.totalBlocks = (this.lastIndexPtr-this.firstIndexPtr)/INDEX_BLOCK_LENGTH + 1
}
ip, err := ip2long(ipStr)
if err != nil {
return ipInfo, err
}
h := this.totalBlocks
var dataPtr, l int64;
for (l <= h) {
var (
h = this.totalBlocks
dataPtr, l int64
)
for l <= h {
m := (l + h) >> 1
p := this.firstIndexPtr + m * INDEX_BLOCK_LENGTH
p := this.firstIndexPtr + m*INDEX_BLOCK_LENGTH
sip := getLong(this.dbBinStr, p)
if ip < sip {
h = m - 1
} else {
eip := getLong(this.dbBinStr, p + 4)
eip := getLong(this.dbBinStr, p+4)
if ip > eip {
l = m + 1
} else {
dataPtr = getLong(this.dbBinStr, p + 8)
break;
dataPtr = getLong(this.dbBinStr, p+8)
break
}
}
}
if dataPtr == 0 {
return ipInfo, errors.New("not found")
}
dataLen := ((dataPtr >> 24) & 0xFF)
dataPtr = (dataPtr & 0x00FFFFFF);
ipInfo = getIpInfo(getLong(this.dbBinStr, dataPtr), this.dbBinStr[(dataPtr) + 4:dataPtr + dataLen])
dataLen := (dataPtr >> 24) & 0xFF
dataPtr = dataPtr & 0x00FFFFFF
ipInfo = getIpInfo(getLong(this.dbBinStr, dataPtr), this.dbBinStr[(dataPtr)+4:dataPtr+dataLen])
return ipInfo, nil
}
func (this *Ip2Region)BinarySearch(ipStr string) (ipInfo IpInfo, err error) {
func (this *Ip2Region) BinarySearch(ipStr string) (ipInfo IpInfo, err error) {
ipInfo = IpInfo{}
if this.totalBlocks == 0 {
this.dbFileHandler.Seek(0, 0)
@ -148,34 +134,27 @@ func (this *Ip2Region)BinarySearch(ipStr string) (ipInfo IpInfo, err error) {
this.dbFileHandler.Read(superBlock)
this.firstIndexPtr = getLong(superBlock, 0)
this.lastIndexPtr = getLong(superBlock, 4)
this.totalBlocks = (this.lastIndexPtr - this.firstIndexPtr) / INDEX_BLOCK_LENGTH + 1
this.totalBlocks = (this.lastIndexPtr-this.firstIndexPtr)/INDEX_BLOCK_LENGTH + 1
}
var l, dataPtr, p int64
h := this.totalBlocks
var (
h = this.totalBlocks
l, dataPtr, p int64
)
ip, err := ip2long(ipStr)
if err != nil {
return
}
for (l <= h) {
for l <= h {
m := (l + h) >> 1
p = m * INDEX_BLOCK_LENGTH
_, err = this.dbFileHandler.Seek(this.firstIndexPtr + p, 0)
_, err = this.dbFileHandler.Seek(this.firstIndexPtr+p, 0)
if err != nil {
return
}
buffer := make([]byte, INDEX_BLOCK_LENGTH)
_, err = this.dbFileHandler.Read(buffer)
if err != nil {
return
}
sip := getLong(buffer, 0)
if ip < sip {
@ -186,129 +165,119 @@ func (this *Ip2Region)BinarySearch(ipStr string) (ipInfo IpInfo, err error) {
l = m + 1
} else {
dataPtr = getLong(buffer, 8)
break;
break
}
}
}
if dataPtr == 0 {
err = errors.New("not found")
return
return ipInfo, errors.New("not found")
}
dataLen := ((dataPtr >> 24) & 0xFF)
dataPtr = (dataPtr & 0x00FFFFFF);
dataLen := (dataPtr >> 24) & 0xFF
dataPtr = dataPtr & 0x00FFFFFF
this.dbFileHandler.Seek(dataPtr, 0)
data := make([]byte, dataLen)
this.dbFileHandler.Read(data)
ipInfo = getIpInfo(getLong(data, 0), data[4:dataLen])
err = nil
return
}
func (this *Ip2Region) BtreeSearch(ipStr string) (ipInfo IpInfo, err error) {
ipInfo = IpInfo{}
ip, err := ip2long(ipStr)
if err != nil {
return
}
ipInfo = IpInfo{}
if this.headerLen == 0 {
this.dbFileHandler.Seek(8, 0)
buffer := make([]byte, TOTAL_HEADER_LENGTH)
this.dbFileHandler.Read(buffer)
var idx int64;
var idx int64
for i := 0; i < TOTAL_HEADER_LENGTH; i += 8 {
startIp := getLong(buffer, int64(i))
dataPar := getLong(buffer, int64(i + 4))
dataPar := getLong(buffer, int64(i+4))
if dataPar == 0 {
break
}
this.headerSip = append(this.headerSip, startIp)
this.headerPtr = append(this.headerPtr, dataPar)
idx ++;
idx++
}
this.headerLen = idx
}
var l, sptr, eptr int64
h := this.headerLen
var (
l, sptr, eptr int64
h = this.headerLen
)
for l <= h {
m := int64(l + h) >> 1
m := (l + h) >> 1
if m < this.headerLen {
if ip == this.headerSip[m] {
if m > 0 {
sptr = this.headerPtr[m - 1]
sptr = this.headerPtr[m-1]
eptr = this.headerPtr[m]
} else {
sptr = this.headerPtr[m]
eptr = this.headerPtr[m + 1]
eptr = this.headerPtr[m+1]
}
break
}
if ip < this.headerSip[m] {
if m == 0 {
sptr = this.headerPtr[m]
eptr = this.headerPtr[m + 1]
eptr = this.headerPtr[m+1]
break
} else if ip > this.headerSip[m - 1] {
sptr = this.headerPtr[m - 1]
} else if ip > this.headerSip[m-1] {
sptr = this.headerPtr[m-1]
eptr = this.headerPtr[m]
break
}
h = m - 1
} else {
if m == this.headerLen - 1 {
sptr = this.headerPtr[m - 1]
if m == this.headerLen-1 {
sptr = this.headerPtr[m-1]
eptr = this.headerPtr[m]
break
} else if ip <= this.headerSip[m + 1] {
sptr = this.headerPtr[m ]
eptr = this.headerPtr[m + 1]
} else if ip <= this.headerSip[m+1] {
sptr = this.headerPtr[m]
eptr = this.headerPtr[m+1]
break
}
l = m + 1
}
}
}
if sptr == 0 {
err = errors.New("not found")
return
return ipInfo, errors.New("not found")
}
blockLen := eptr - sptr
this.dbFileHandler.Seek(sptr, 0)
index := make([]byte, blockLen + INDEX_BLOCK_LENGTH)
index := make([]byte, blockLen+INDEX_BLOCK_LENGTH)
this.dbFileHandler.Read(index)
var dataptr int64
h = blockLen / INDEX_BLOCK_LENGTH
l = 0
for l <= h {
m := int64(l + h) >> 1
m := (l + h) >> 1
p := m * INDEX_BLOCK_LENGTH
sip := getLong(index, p)
if ip < sip {
h = m - 1;
h = m - 1
} else {
eip := getLong(index, p + 4)
eip := getLong(index, p+4)
if ip > eip {
l = m + 1
} else {
dataptr = getLong(index, p + 8)
dataptr = getLong(index, p+8)
break
}
}
}
if dataptr == 0 {
err = errors.New("not found")
return
return ipInfo, errors.New("not found")
}
dataLen := (dataptr >> 24) & 0xFF
@ -322,28 +291,13 @@ func (this *Ip2Region) BtreeSearch(ipStr string) (ipInfo IpInfo, err error) {
}
func getLong(b []byte, offset int64) int64 {
val := (int64(b[offset ]) |
int64(b[offset + 1]) << 8 |
int64(b[offset + 2]) << 16 |
int64(b[offset + 3]) << 24)
return val
return int64(b[offset]) | int64(b[offset+1])<<8 | int64(b[offset+2])<<16 | int64(b[offset+3])<<24
}
func ip2long(IpStr string) (int64, error) {
bits := strings.Split(IpStr, ".")
if len(bits) != 4 {
func ip2long(ipStr string) (int64, error) {
ipv4 := net.ParseIP(ipStr)
if ipv4 == nil {
return 0, errors.New("ip format error")
}
var sum int64
for i, n := range bits {
bit, _ := strconv.ParseInt(n, 10, 64)
sum += bit << uint(24 - 8 * i)
}
return sum, nil
return int64(binary.BigEndian.Uint32(ipv4[12:])), nil
}

6
binding/golang/ip2region/ip2Region_test.go
View File

@ -5,7 +5,7 @@ import (
)
func BenchmarkBtreeSearch(B *testing.B) {
region, err := New("../../data/ip2region.db ")
region, err := New("../../../data/ip2region.db")
if err != nil {
B.Error(err)
}
@ -16,7 +16,7 @@ func BenchmarkBtreeSearch(B *testing.B) {
}
func BenchmarkMemorySearch(B *testing.B) {
region, err := New("../../data/ip2region.db ")
region, err := New("../../../data/ip2region.db")
if err != nil {
B.Error(err)
}
@ -27,7 +27,7 @@ func BenchmarkMemorySearch(B *testing.B) {
}
func BenchmarkBinarySearch(B *testing.B) {
region, err := New("../../data/ip2region.db ")
region, err := New("../../../data/ip2region.db")
if err != nil {
B.Error(err)
}