def serve(request, path, document_root=None, show_indexes=False):
    """
    Serve static files below a given point in the directory structure.

    To use, put a URL pattern such as::

        (r'^(?P<path>.*)$', 'django.views.static.serve', {'document_root' : '/path/to/my/files/'})

    in your URLconf. You must provide the ``document_root`` param. You may
    also set ``show_indexes`` to ``True`` if you'd like to serve a basic index
    of the directory.  This index view will use the template hardcoded below,
    but if you'd like to override it, you can create a template called
    ``static/directory_index.html``.
    """

    # Clean up given path to only allow serving files below document_root.
    path = posixpath.normpath(urllib.unquote(path))
    path = path.lstrip('/')
    newpath = ''
    for part in path.split('/'):
        if not part:
            # Strip empty path components.
            continue
        drive, part = os.path.splitdrive(part)
        head, part = os.path.split(part)
        if part in (os.curdir, os.pardir):
            # Strip '.' and '..' in path.
            continue
        newpath = os.path.join(newpath, part).replace('\\', '/')
    if newpath and path != newpath:
        return HttpResponseRedirect(newpath)
    fullpath = os.path.join(document_root, newpath)
    if os.path.isdir(fullpath):
        if show_indexes:
            return directory_index(newpath, fullpath)
        raise Http404("Directory indexes are not allowed here.")
    if not os.path.exists(fullpath):
        raise Http404('"%s" does not exist' % fullpath)
    # Respect the If-Modified-Since header.
    statobj = os.stat(fullpath)
    mimetype, encoding = mimetypes.guess_type(fullpath)
    mimetype = mimetype or 'application/octet-stream'
    if not was_modified_since(request.META.get('HTTP_IF_MODIFIED_SINCE'),
                              statobj[stat.ST_MTIME], statobj[stat.ST_SIZE]):
        return HttpResponseNotModified(mimetype=mimetype)
    contents = open(fullpath, 'rb').read()
    response = HttpResponse(contents, mimetype=mimetype)
    response["Last-Modified"] = http_date(statobj[stat.ST_MTIME])
    response["Content-Length"] = len(contents)
    if encoding:
        response["Content-Encoding"] = encoding
    return response
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/views/static.py/serve/original