Add ENABLE_PUSH flag in the Upgrade HTTP2-Settings header

hyper/common/connection.py

@@ -62,7 +62,8 @@ def __init__(self,
         self._port = port
         self._h1_kwargs = {
             'secure': secure, 'ssl_context': ssl_context,
-            'proxy_host': proxy_host, 'proxy_port': proxy_port
+            'proxy_host': proxy_host, 'proxy_port': proxy_port,
+            'enable_push': enable_push
         }
         self._h2_kwargs = {
             'window_manager': window_manager, 'enable_push': enable_push,

hyper/http11/connection.py

@@ -78,6 +78,7 @@ def __init__(self, host, port=None, secure=None, ssl_context=None,
 
         # only send http upgrade headers for non-secure connection
         self._send_http_upgrade = not self.secure
+        self._enable_push = int(kwargs.get('enable_push', False))
 
         self.ssl_context = ssl_context
         self._sock = None
@@ -276,6 +277,7 @@ def _add_upgrade_headers(self, headers):
         # Settings header.
         http2_settings = SettingsFrame(0)
         http2_settings.settings[SettingsFrame.INITIAL_WINDOW_SIZE] = 65535
+        http2_settings.settings[SettingsFrame.ENABLE_PUSH] = self._enable_push
         encoded_settings = base64.urlsafe_b64encode(
             http2_settings.serialize_body()
         )