def test_is_hidden_win32():
    with TemporaryDirectory() as root:
        root = cast_unicode(root)
        subdir1 = os.path.join(root, u'subdir')
        os.makedirs(subdir1)
        assert not is_hidden(subdir1, root)
        r = ctypes.windll.kernel32.SetFileAttributesW(subdir1, 0x02)
        print(r)
        assert is_hidden(subdir1, root)

def test_is_hidden():
    with TemporaryDirectory() as root:
        subdir1 = os.path.join(root, 'subdir')
        os.makedirs(subdir1)
        nt.assert_equal(is_hidden(subdir1, root), False)
        subdir2 = os.path.join(root, '.subdir2')
        os.makedirs(subdir2)
        nt.assert_equal(is_hidden(subdir2, root), True)
        subdir34 = os.path.join(root, 'subdir3', '.subdir4')
        os.makedirs(subdir34)
        nt.assert_equal(is_hidden(subdir34, root), True)
        nt.assert_equal(is_hidden(subdir34), True)

    def _dir_model(self, path, content=True):
        """Build a model for a directory

        if content is requested, will include a listing of the directory
        """
        os_path = self._get_os_path(path)

        four_o_four = u'directory does not exist: %r' % path

        if not os.path.isdir(os_path):
            raise web.HTTPError(404, four_o_four)
        elif is_hidden(os_path, self.root_dir):
            self.log.info("Refusing to serve hidden directory %r, via 404 Error",
                os_path
            )
            raise web.HTTPError(404, four_o_four)

        model = self._base_model(path)
        model['type'] = 'directory'
        if content:
            model['content'] = contents = []
            os_dir = self._get_os_path(path)
            for name in os.listdir(os_dir):
                try:
                    os_path = os.path.join(os_dir, name)
                except UnicodeDecodeError as e:
                    self.log.warning(
                        "failed to decode filename '%s': %s", name, e)
                    continue
                # skip over broken symlinks in listing
                if not os.path.exists(os_path):
                    self.log.warning("%s doesn't exist", os_path)
                    continue
                elif not os.path.isfile(os_path) and not os.path.isdir(os_path):
                    self.log.debug("%s not a regular file", os_path)
                    continue
                if self.should_list(name) and not is_hidden(os_path, self.root_dir):
                    contents.append(self.get(
                        path='%s/%s' % (path, name),
                        content=False)
                    )

            model['format'] = 'json'

        return model

def test_is_hidden():
    with TemporaryDirectory() as root:
        subdir1 = os.path.join(root, 'subdir')
        os.makedirs(subdir1)
        nt.assert_equal(is_hidden(subdir1, root), False)
        nt.assert_equal(is_file_hidden(subdir1), False)

        subdir2 = os.path.join(root, '.subdir2')
        os.makedirs(subdir2)
        nt.assert_equal(is_hidden(subdir2, root), True)
        nt.assert_equal(is_file_hidden(subdir2), True)#
        # root dir is always visible
        nt.assert_equal(is_hidden(subdir2, subdir2), False)

        subdir34 = os.path.join(root, 'subdir3', '.subdir4')
        os.makedirs(subdir34)
        nt.assert_equal(is_hidden(subdir34, root), True)
        nt.assert_equal(is_hidden(subdir34), True)

        subdir56 = os.path.join(root, '.subdir5', 'subdir6')
        os.makedirs(subdir56)
        nt.assert_equal(is_hidden(subdir56, root), True)
        nt.assert_equal(is_hidden(subdir56), True)
        nt.assert_equal(is_file_hidden(subdir56), False)
        nt.assert_equal(is_file_hidden(subdir56, os.stat(subdir56)), False)

    def _dir_model(self, path, content=True):
        """Build a model for a directory

        if content is requested, will include a listing of the directory
        """
        os_path = self._get_os_path(path)

        four_o_four = u'directory does not exist: %r' % path

        if not os.path.isdir(os_path):
            raise web.HTTPError(404, four_o_four)
        elif is_hidden(os_path, self.root_dir) and not self.allow_hidden:
            self.log.info("Refusing to serve hidden directory %r, via 404 Error",
                os_path
            )
            raise web.HTTPError(404, four_o_four)

        model = self._base_model(path)
        model['type'] = 'directory'
        model['size'] = None
        if content:
            model['content'] = contents = []
            os_dir = self._get_os_path(path)
            for name in os.listdir(os_dir):
                try:
                    os_path = os.path.join(os_dir, name)
                except UnicodeDecodeError as e:
                    self.log.warning(
                        "failed to decode filename '%s': %s", name, e)
                    continue

                try:
                    st = os.lstat(os_path)
                except OSError as e:
                    # skip over broken symlinks in listing
                    if e.errno == errno.ENOENT:
                        self.log.warning("%s doesn't exist", os_path)
                    else:
                        self.log.warning("Error stat-ing %s: %s", os_path, e)
                    continue

                if (not stat.S_ISLNK(st.st_mode)
                        and not stat.S_ISREG(st.st_mode)
                        and not stat.S_ISDIR(st.st_mode)):
                    self.log.debug("%s not a regular file", os_path)
                    continue

                if self.should_list(name):
                    if self.allow_hidden or not is_file_hidden(os_path, stat_res=st):
                        contents.append(
                                self.get(path='%s/%s' % (path, name), content=False)
                        )

            model['format'] = 'json'

        return model

 def _save_directory(self, os_path, model, path=''):
     """create a directory"""
     if is_hidden(os_path, self.root_dir):
         raise web.HTTPError(400, u'Cannot create hidden directory %r' % os_path)
     if not os.path.exists(os_path):
         with self.perm_to_403():
             os.mkdir(os_path)
     elif not os.path.isdir(os_path):
         raise web.HTTPError(400, u'Not a directory: %s' % (os_path))
     else:
         self.log.debug("Directory %r already exists", os_path)

 def validate_absolute_path(self, root, absolute_path):
     """Validate and return the absolute path.
     
     Requires tornado 3.1
     
     Adding to tornado's own handling, forbids the serving of hidden files.
     """
     abs_path = super(AuthenticatedFileHandler, self).validate_absolute_path(root, absolute_path)
     abs_root = os.path.abspath(root)
     if is_hidden(abs_path, abs_root):
         self.log.info("Refusing to serve hidden file, via 404 Error")
         raise web.HTTPError(404)
     return abs_path

    def is_hidden(self, path):
        """Does the API style path correspond to a hidden directory or file?

        Parameters
        ----------
        path : string
            The path to check. This is an API path (`/` separated,
            relative to root_dir).

        Returns
        -------
        hidden : bool
            Whether the path exists and is hidden.
        """
        path = path.strip('/')
        os_path = self._get_os_path(path=path)
        return is_hidden(os_path, self.root_dir)