lionsoul2014/ip2region · error

open xdb file `%s`: %w

Error message

open xdb file `%s`: %w

What it means

Go CLI helper: os.OpenFile with O_RDONLY failed on the xdb path — file missing, unreadable, or a directory; the wrapped system error gives the exact errno.

Source

Thrown at binding/golang/main.go:78

		return nil, fmt.Errorf("parse v6 cache policy: %w", err)
	}

	v6DbPath, err := homedir.Expand(v6XdbPath)
	if err != nil {
		return nil, fmt.Errorf("Expand(`%s`): %s", v6XdbPath, err)
	}
	v6Config, err := service.NewV6Config(v6Policy, v6DbPath, 1)
	if err != nil {
		return nil, fmt.Errorf("NewV6Config: %w", err)
	}

	return service.NewIp2Region(v4Config, v6Config)
}

func createSearcher(dbPath string, cachePolicy string) (*xdb.Searcher, error) {
	handle, err := os.OpenFile(dbPath, os.O_RDONLY, 0600)
	if err != nil {
		return nil, fmt.Errorf("open xdb file `%s`: %w", dbPath, err)
	}

	defer handle.Close()

	// verify the xdb file
	// @Note: do NOT call it every time you create a searcher since this will slow down the search response.
	// @see the util.Verify function for details.
	err = xdb.Verify(handle)
	if err != nil {
		return nil, fmt.Errorf("xdb verify: %w", err)
	}

	// auto-detect the ip version from the xdb header
	header, err := xdb.LoadHeader(handle)
	if err != nil {
		return nil, fmt.Errorf("failed to load header from `%s`: %s", dbPath, err)
	}

View on GitHub (pinned to c1a1fc7d59)

Solutions

1. Check the path and file permissions for the xdb file
2. Ensure the file exists before starting the benchmark/search command
3. Use an absolute path to avoid working-directory issues

When it happens

Trigger: Thrown at binding/golang/main.go:78 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of lionsoul2014/ip2region@c1a1fc7d59 (2026-09-02). Data as JSON: /api/errors/c4d34233e3b51611. Report an issue: GitHub.