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mmdb.go
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mmdb.go
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package mmdb
import (
"context"
"io"
"net/http"
"os"
"sync"
"time"
clashHttp "github.com/devsolux/clash-meta/component/http"
C "github.com/devsolux/clash-meta/constant"
"github.com/devsolux/clash-meta/log"
"github.com/oschwald/maxminddb-golang"
)
type databaseType = uint8
const (
typeMaxmind databaseType = iota
typeSing
typeMetaV0
)
var (
reader Reader
once sync.Once
)
func LoadFromBytes(buffer []byte) {
once.Do(func() {
mmdb, err := maxminddb.FromBytes(buffer)
if err != nil {
log.Fatalln("Can't load mmdb: %s", err.Error())
}
reader = Reader{Reader: mmdb}
switch mmdb.Metadata.DatabaseType {
case "sing-geoip":
reader.databaseType = typeSing
case "Meta-geoip0":
reader.databaseType = typeMetaV0
default:
reader.databaseType = typeMaxmind
}
})
}
func Verify() bool {
instance, err := maxminddb.Open(C.Path.MMDB())
if err == nil {
instance.Close()
}
return err == nil
}
func Instance() Reader {
once.Do(func() {
mmdbPath := C.Path.MMDB()
log.Debugln("Load MMDB file: %s", mmdbPath)
mmdb, err := maxminddb.Open(mmdbPath)
if err != nil {
log.Fatalln("Can't load MMDB: %s", err.Error())
}
reader = Reader{Reader: mmdb}
switch mmdb.Metadata.DatabaseType {
case "sing-geoip":
reader.databaseType = typeSing
case "Meta-geoip0":
reader.databaseType = typeMetaV0
default:
reader.databaseType = typeMaxmind
}
})
return reader
}
func DownloadMMDB(path string) (err error) {
ctx, cancel := context.WithTimeout(context.Background(), time.Second*90)
defer cancel()
resp, err := clashHttp.HttpRequest(ctx, C.MmdbUrl, http.MethodGet, http.Header{"User-Agent": {"clash"}}, nil)
if err != nil {
return
}
defer resp.Body.Close()
f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0o644)
if err != nil {
return err
}
defer f.Close()
_, err = io.Copy(f, resp.Body)
return err
}