test_urllib2.py 文件源码

def test_request_headers_methods(self):
        """
        Note the case normalization of header names here, to
        .capitalize()-case.  This should be preserved for
        backwards-compatibility.  (In the HTTP case, normalization to
        .title()-case is done by urllib2 before sending headers to
        http.client).

        Note that e.g. r.has_header("spam-EggS") is currently False, and
        r.get_header("spam-EggS") returns None, but that could be changed in
        future.

        Method r.remove_header should remove items both from r.headers and
        r.unredirected_hdrs dictionaries
        """
        url = "http://example.com"
        req = Request(url, headers={"Spam-eggs": "blah"})
        self.assertTrue(req.has_header("Spam-eggs"))
        self.assertEqual(req.header_items(), [('Spam-eggs', 'blah')])

        req.add_header("Foo-Bar", "baz")
        self.assertEqual(sorted(req.header_items()),
                         [('Foo-bar', 'baz'), ('Spam-eggs', 'blah')])
        self.assertFalse(req.has_header("Not-there"))
        self.assertIsNone(req.get_header("Not-there"))
        self.assertEqual(req.get_header("Not-there", "default"), "default")

        req.remove_header("Spam-eggs")
        self.assertFalse(req.has_header("Spam-eggs"))

        req.add_unredirected_header("Unredirected-spam", "Eggs")
        self.assertTrue(req.has_header("Unredirected-spam"))

        req.remove_header("Unredirected-spam")
        self.assertFalse(req.has_header("Unredirected-spam"))