func()

in internal/serving/disk/reader.go [181:218]

• 26 lines of code
• 6 McCabe index (conditional complexity)

func (reader *Reader) resolvePath(ctx context.Context, root vfs.Root, subPath ...string) (string, error) {
	// Don't use filepath.Join as cleans the path,
	// where we want to traverse full path as supplied by user
	// (including ..)
	testPath := strings.Join(subPath, "/")
	fullPath, err := symlink.EvalSymlinks(ctx, root, testPath)

	if err != nil {
		if endsWithoutHTMLExtension(testPath) {
			return "", &locationFileNoExtensionError{
				FullPath: fullPath,
			}
		}

		return "", err
	}

	fi, err := root.Lstat(ctx, fullPath)
	if err != nil {
		return "", err
	}

	// The requested path is a directory, so try index.html via recursion
	if fi.IsDir() {
		return "", &locationDirectoryError{
			FullPath:     fullPath,
			RelativePath: testPath,
		}
	}

	// The file exists, but is not a supported type to serve. Perhaps a block
	// special device or something else that may be a security risk.
	if !fi.Mode().IsRegular() {
		return "", fmt.Errorf("%s: is not a regular file", fullPath)
	}

	return fullPath, nil
}