Change error text for connection closed by server between sending response

Author: asvetlov

aiohttp/protocol.py

@@ -204,6 +204,11 @@ class HttpResponseParser(HttpParser):
     Returns RawResponseMessage"""
 
     def __call__(self, out, buf):
+        try:
+            yield from buf.wait(1)
+        except aiohttp.EofStream:
+            raise errors.ClientConnectionError(
+                'Connection closed by server') from None
         try:
             # read http message (response line + headers)
             try:

tests/test_client_functional.py

@@ -1095,12 +1095,21 @@ def go():
             connector = aiohttp.TCPConnector(loop=self.loop)
 
             url = 'http://{}:{}/'.format(*addr)
-            for i in range(2):
-                r = yield from client.request('GET', url,
-                                              connector=connector,
-                                              loop=self.loop)
-                yield from r.read()
-                self.assertEqual(1, len(connector._conns))
+
+            r = yield from client.request('GET', url,
+                                          connector=connector,
+                                          loop=self.loop)
+            yield from r.read()
+            self.assertEqual(1, len(connector._conns))
+
+            with self.assertRaisesRegex(
+                    aiohttp.ClientConnectionError,
+                    'Connection closed by server'):
+                yield from client.request('GET', url,
+                                          connector=connector,
+                                          loop=self.loop)
+            self.assertEqual(0, len(connector._conns))
+
             connector.close()
             server.close()
             yield from server.wait_closed()