PY3: Implement some attributes of WrappedRequest required in Python 3

This will fix #1770.

scrapy/http/cookies.py

@@ -137,13 +137,29 @@ class WrappedRequest(object):
         """
         return self.request.meta.get('is_unverifiable', False)
 
-    # python3 uses request.unverifiable
+    def get_origin_req_host(self):
+        return urlparse_cached(self.request).hostname
+
+    # python3 uses attributes instead of methods
+    @property
+    def full_url(self):
+        return self.get_full_url()
+
+    @property
+    def host(self):
+        return self.get_host()
+
+    @property
+    def type(self):
+        return self.get_type()
+
     @property
     def unverifiable(self):
         return self.is_unverifiable()
 
-    def get_origin_req_host(self):
-        return urlparse_cached(self.request).hostname
+    @property
+    def origin_req_host(self):
+        return self.get_origin_req_host()
 
     def has_header(self, name):
         return name in self.request.headers

tests/test_http_cookies.py

@@ -14,12 +14,15 @@ class WrappedRequestTest(TestCase):
 
     def test_get_full_url(self):
         self.assertEqual(self.wrapped.get_full_url(), self.request.url)
+        self.assertEqual(self.wrapped.full_url, self.request.url)
 
     def test_get_host(self):
         self.assertEqual(self.wrapped.get_host(), urlparse(self.request.url).netloc)
+        self.assertEqual(self.wrapped.host, urlparse(self.request.url).netloc)
 
     def test_get_type(self):
         self.assertEqual(self.wrapped.get_type(), urlparse(self.request.url).scheme)
+        self.assertEqual(self.wrapped.type, urlparse(self.request.url).scheme)
 
     def test_is_unverifiable(self):
         self.assertFalse(self.wrapped.is_unverifiable())
@@ -32,6 +35,7 @@ class WrappedRequestTest(TestCase):
 
     def test_get_origin_req_host(self):
         self.assertEqual(self.wrapped.get_origin_req_host(), 'www.example.com')
+        self.assertEqual(self.wrapped.origin_req_host, 'www.example.com')
 
     def test_has_header(self):
         self.assertTrue(self.wrapped.has_header('content-type'))