xboard
106 lines
2.6 KiB
Go
106 lines
2.6 KiB
Go
package geodata
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import (
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"fmt"
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"io"
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"log/slog"
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"net/http"
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"os"
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"path/filepath"
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"time"
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)
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const (
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singboxGeoIPURL = "https://github.com/SagerNet/sing-geoip/releases/latest/download/geoip.db"
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singboxGeoSiteURL = "https://github.com/SagerNet/sing-geosite/releases/latest/download/geosite.db"
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xrayGeoIPURL = "https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geoip.dat"
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xrayGeoSiteURL = "https://github.com/Loyalsoldier/v2ray-rules-dat/releases/latest/download/geosite.dat"
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)
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var httpClient = &http.Client{Timeout: 10 * time.Minute}
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func Ensure(dir string, needGeoIP, needGeoSite bool, kernelType string) error {
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if err := os.MkdirAll(dir, 0o755); err != nil {
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return fmt.Errorf("create geo_data_dir %q: %w", dir, err)
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}
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type entry struct {
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name string
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url string
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}
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var files []entry
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if kernelType == "singbox" {
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if needGeoIP {
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files = append(files, entry{"geoip.db", singboxGeoIPURL})
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}
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if needGeoSite {
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files = append(files, entry{"geosite.db", singboxGeoSiteURL})
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}
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} else {
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if needGeoIP {
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files = append(files, entry{"geoip.dat", xrayGeoIPURL})
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}
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if needGeoSite {
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files = append(files, entry{"geosite.dat", xrayGeoSiteURL})
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}
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}
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var firstErr error
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for _, f := range files {
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if err := ensureFile(dir, f.name, f.url); err != nil {
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slog.Warn("geo database auto-download failed", "file", f.name, "error", err)
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if firstErr == nil {
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firstErr = err
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}
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}
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}
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return firstErr
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}
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func ensureFile(dir, name, url string) error {
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dst := filepath.Join(dir, name)
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if _, err := os.Stat(dst); err == nil {
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return nil
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}
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slog.Info("geo database missing, downloading automatically", "file", name, "url", url)
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if err := atomicDownload(dst, url); err != nil {
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return err
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}
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if fi, err := os.Stat(dst); err == nil {
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slog.Info("geo database ready", "file", name, "size_kb", fi.Size()/1024)
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}
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return nil
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}
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func atomicDownload(dst, url string) error {
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resp, err := httpClient.Get(url)
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if err != nil {
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return fmt.Errorf("http get %s: %w", url, err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("unexpected HTTP status from %s: %s", url, resp.Status)
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}
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tmp := dst + ".tmp"
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f, err := os.Create(tmp)
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if err != nil {
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return fmt.Errorf("create temp file: %w", err)
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}
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defer os.Remove(tmp)
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if _, err := io.Copy(f, resp.Body); err != nil {
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f.Close()
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return fmt.Errorf("write geo database: %w", err)
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}
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if err := f.Close(); err != nil {
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return fmt.Errorf("close temp file: %w", err)
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}
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if err := os.Rename(tmp, dst); err != nil {
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return fmt.Errorf("rename to destination: %w", err)
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}
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return nil
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}
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