Request
-------

.. py:class:: pydu.request.Filename

  Supply several methods to get filename.

  .. py:staticmethod:: from_url(url):

    Detected filename as unicode or None.

  .. py:staticmethod:: from_headers(headers):

    Detect filename from Content-Disposition headers if present.
    ``headers`` could be a dict, list or string.


.. py:function:: pydu.request.download(url, dst=None)

  High level function, which downloads URL into tmp file in current
  directory and then renames it to filename autodetected from either URL
  or HTTP headers.
  ``url`` indicates which url to download.
  ``dst`` is the filename or directory of destination. ``None`` as default, means
  download to current directory.