status-go/vendor/github.com/anacrolix/dht/v2/nodes_file.go

44 lines
755 B
Go
Raw Normal View History

2022-03-10 09:44:48 +00:00
package dht
import (
"io/ioutil"
"os"
"github.com/anacrolix/dht/v2/krpc"
)
func WriteNodesToFile(ns []krpc.NodeInfo, fileName string) (err error) {
b, err := krpc.CompactIPv6NodeInfo(ns).MarshalBinary()
if err != nil {
return
}
f, err := os.OpenFile(fileName, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o640)
if err != nil {
return
}
defer func() {
closeErr := f.Close()
if err == nil {
err = closeErr
}
}()
_, err = f.Write(b)
return
}
func ReadNodesFromFile(fileName string) (ns []krpc.NodeInfo, err error) {
f, err := os.Open(fileName)
if err != nil {
return
}
defer f.Close()
b, err := ioutil.ReadAll(f)
if err != nil {
return
}
var cnis krpc.CompactIPv6NodeInfo
err = cnis.UnmarshalBinary(b)
ns = cnis
return
}