test_urllib2net.py 文件源码

def test_custom_headers(self):
        url = "http://www.example.com"
        with support.transient_internet(url):
            opener = urllib.request.build_opener()
            request = urllib.request.Request(url)
            self.assertFalse(request.header_items())
            opener.open(request)
            self.assertTrue(request.header_items())
            self.assertTrue(request.has_header('User-agent'))
            request.add_header('User-Agent','Test-Agent')
            opener.open(request)
            self.assertEqual(request.get_header('User-agent'),'Test-Agent')