Accept POST request with empty body

src/microdot.py

@@ -291,8 +291,9 @@ class Request():
 
     def _parse_urlencoded(self, urlencoded):
         data = MultiDict()
-        for k, v in [pair.split('=', 1) for pair in urlencoded.split('&')]:
-            data[urldecode(k)] = urldecode(v)
+        if urlencoded:
+            for k, v in [pair.split('=', 1) for pair in urlencoded.split('&')]:
+                data[urldecode(k)] = urldecode(v)
         return data
 
     @property

tests/microdot/test_request.py

@@ -73,6 +73,14 @@ class TestRequest(unittest.TestCase):
             {'foo': 'bar', 'abc': 'def', 'x': '/%%'}))
         self.assertTrue(req.form is form)
 
+        fd = get_request_fd('GET', '/foo', headers={
+            'Content-Type': 'application/x-www-form-urlencoded'},
+            body='')
+        req = Request.create('app', fd, 'addr')
+        form = req.form
+        self.assertEqual(form, MultiDict({}))
+        self.assertTrue(req.form is form)
+
         fd = get_request_fd('GET', '/foo', headers={
             'Content-Type': 'application/json'},
             body='foo=bar&abc=def&x=%2f%%')