133 lines
2.4 KiB
Go
133 lines
2.4 KiB
Go
package data
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import (
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"fmt"
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"github.com/rs/zerolog/log"
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"io"
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"os"
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"path/filepath"
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"sync"
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"thuanle.me/ip-info/configs"
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)
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import reader "github.com/oschwald/maxminddb-golang"
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type IpDb struct {
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r *reader.Reader
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mu sync.RWMutex
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dbFile string
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}
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var (
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ins *IpDb
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once sync.Once
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)
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func Ins() *IpDb {
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once.Do(func() {
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ins = &IpDb{}
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_ = ins.Reload()
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})
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return ins
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}
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func CleanupDataDir() error {
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if _, err := os.Stat(configs.GeoDbFolder); os.IsNotExist(err) {
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log.Info().Str("dir", configs.GeoDbFolder).Msg("Creating data folder")
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err := os.MkdirAll(configs.GeoDbFolder, os.ModePerm)
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if err != nil {
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return err
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}
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}
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log.Info().Str("dir", configs.GeoDbFolder).Msg("Cleaning temp files")
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dir, err := os.Open(configs.GeoDbFolder)
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if err != nil {
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return err
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}
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defer dir.Close()
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// List all files in the directory
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files, err := dir.Readdir(-1) // -1 means read all files
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if err != nil {
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return err
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}
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// Delete each file
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for _, file := range files {
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if !file.IsDir() && file.Name() != configs.MmdbDbFileName {
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filePath := filepath.Join(configs.GeoDbFolder, file.Name())
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err := os.Remove(filePath)
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if err != nil {
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return fmt.Errorf("failed to delete file %s: %w", filePath, err)
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}
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fmt.Printf("Deleted file: %s\n", filePath)
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}
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}
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return nil
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}
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func (d *IpDb) Reload() error {
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d.mu.Lock()
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defer d.mu.Unlock()
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wilDeleteFile := d.dbFile
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tmpFile, err := cloneDBFile()
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if err != nil {
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log.Err(err).Msg("Failed to clone db file")
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return err
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}
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d.dbFile = tmpFile
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r, err := reader.Open(tmpFile)
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if err != nil {
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log.Err(err).Msg("Failed to open mmdb")
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return err
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}
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log.Info().Str("file", tmpFile).Msg("MMDB reloaded")
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tmpR := d.r
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d.r = r
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if tmpR != nil {
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_ = tmpR.Close()
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if wilDeleteFile != "" {
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log.Info().Str("file", wilDeleteFile).Msg("Deleting old mmdb")
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_ = os.Remove(wilDeleteFile)
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}
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}
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return nil
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}
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func (d *IpDb) IsLoaded() bool {
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return d.r != nil
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}
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func cloneDBFile() (string, error) {
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srcFile, err := os.Open(configs.MmdbDbFile)
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if err != nil {
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return "", err
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}
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defer srcFile.Close()
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tmpFile, err := os.CreateTemp(configs.GeoDbFolder, "geoip-v4-*.mmdb")
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if err != nil {
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return "", fmt.Errorf("failed to create temporary file: %v", err)
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}
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defer tmpFile.Close()
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buf := make([]byte, 1024*1024) // 1 MB buffer
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// Copy the data from srcFile to dstFile
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_, err = io.CopyBuffer(tmpFile, srcFile, buf)
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if err != nil {
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return "", err
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}
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return tmpFile.Name(), nil
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}
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