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package service
import (
"encoding/json"
"fmt"
"io"
"net/http"
"time"
"github.com/mhsanaei/3x-ui/v2/util/common"
)
type NordService struct {
SettingService
}
var nordHTTPClient = &http.Client{Timeout: 15 * time.Second}
// maxResponseSize limits the maximum size of NordVPN API responses (10 MB).
const maxResponseSize = 10 << 20
func (s *NordService) GetCountries() (string, error) {
resp, err := nordHTTPClient.Get("https://api.nordvpn.com/v1/countries")
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(io.LimitReader(resp.Body, maxResponseSize))
if err != nil {
return "", err
}
return string(body), nil
}
func (s *NordService) GetServers(countryId string) (string, error) {
// Validate countryId is numeric to prevent URL injection
for _, c := range countryId {
if c < '0' || c > '9' {
return "", common.NewError("invalid country ID")
}
}
url := fmt.Sprintf("https://api.nordvpn.com/v2/servers?limit=0&filters[servers_technologies][id]=35&filters[country_id]=%s", countryId)
resp, err := nordHTTPClient.Get(url)
if err != nil {
return "", err
}
defer resp.Body.Close()
body, err := io.ReadAll(io.LimitReader(resp.Body, maxResponseSize))
if err != nil {
return "", err
}
var data map[string]any
if err := json.Unmarshal(body, &data); err != nil {
return string(body), nil
}
servers, ok := data["servers"].([]any)
if !ok {
return string(body), nil
}
var filtered []any
for _, s := range servers {
if server, ok := s.(map[string]any); ok {
if load, ok := server["load"].(float64); ok && load > 7 {
filtered = append(filtered, s)
}
}
}
data["servers"] = filtered
result, _ := json.Marshal(data)
return string(result), nil
}
func (s *NordService) SetKey(privateKey string) (string, error) {
if privateKey == "" {
return "", common.NewError("private key cannot be empty")
}
nordData := map[string]string{
"private_key": privateKey,
"token": "",
}
data, _ := json.Marshal(nordData)
err := s.SettingService.SetNord(string(data))
if err != nil {
return "", err
}
return string(data), nil
}
func (s *NordService) GetCredentials(token string) (string, error) {
url := "https://api.nordvpn.com/v1/users/services/credentials"
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return "", err
}
req.SetBasicAuth("token", token)
client := &http.Client{Timeout: 10 * time.Second}
resp, err := client.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return "", common.NewErrorf("NordVPN API error: %s", resp.Status)
}
body, err := io.ReadAll(io.LimitReader(resp.Body, maxResponseSize))
if err != nil {
return "", err
}
var creds map[string]any
if err := json.Unmarshal(body, &creds); err != nil {
return "", err
}
privateKey, ok := creds["nordlynx_private_key"].(string)
if !ok || privateKey == "" {
return "", common.NewError("failed to retrieve NordLynx private key")
}
nordData := map[string]string{
"private_key": privateKey,
"token": token,
}
data, _ := json.Marshal(nordData)
err = s.SettingService.SetNord(string(data))
if err != nil {
return "", err
}
return string(data), nil
}
func (s *NordService) GetNordData() (string, error) {
return s.SettingService.GetNord()
}
func (s *NordService) DelNordData() error {
return s.SettingService.SetNord("")
}
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