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104 lines
1.7 KiB
104 lines
1.7 KiB
package ip2region
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import (
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_ "embed"
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"errors"
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"go.dtapp.net/gostring"
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"os"
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"strconv"
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"strings"
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)
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const (
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IndexBlockLength = 12
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)
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//go:embed ip2region.db
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var dbBuff []byte
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type Client struct {
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// db file handler
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dbFileHandler *os.File
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//header block info
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headerSip []int64
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headerPtr []int64
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headerLen int64
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// super block index info
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firstIndexPtr int64
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lastIndexPtr int64
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totalBlocks int64
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// for memory mode only
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// the original db binary string
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dbFile string
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}
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func New() *Client {
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c := &Client{}
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return c
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}
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// 获取Ip信息
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func getIpInfo(ipStr string, cityId int64, line []byte) (result QueryResult) {
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lineSlice := strings.Split(string(line), "|")
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length := len(lineSlice)
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result.CityId = cityId
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if length < 5 {
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for i := 0; i <= 5-length; i++ {
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lineSlice = append(lineSlice, "")
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}
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}
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if lineSlice[0] != "0" {
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result.Country = gostring.SpaceAndLineBreak(lineSlice[0])
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}
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if lineSlice[1] != "0" {
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result.Region = gostring.SpaceAndLineBreak(lineSlice[1])
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}
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if lineSlice[2] != "0" {
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result.Province = gostring.SpaceAndLineBreak(lineSlice[2])
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}
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if lineSlice[3] != "0" {
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result.City = gostring.SpaceAndLineBreak(lineSlice[3])
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}
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if lineSlice[4] != "0" {
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result.Isp = gostring.SpaceAndLineBreak(lineSlice[4])
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}
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result.Ip = ipStr
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return result
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}
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func getLong(b []byte, offset int64) int64 {
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val := int64(b[offset]) |
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int64(b[offset+1])<<8 |
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int64(b[offset+2])<<16 |
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int64(b[offset+3])<<24
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return val
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}
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func ip2long(IpStr string) (int64, error) {
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bits := strings.Split(IpStr, ".")
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if len(bits) != 4 {
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return 0, errors.New("ip format error")
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}
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var sum int64
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for i, n := range bits {
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bit, _ := strconv.ParseInt(n, 10, 64)
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sum += bit << uint(24-8*i)
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}
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return sum, nil
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}
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