def perform_client_connection_preface(self, force=False):
if force or not self.connection_preface_performed:
self.connection_preface_performed = True
self.tcp_handler.wfile.write(self.CLIENT_CONNECTION_PREFACE)
self.send_frame(frame.SettingsFrame(), hide=True)
self._receive_settings(hide=True) # server announces own settings
self._receive_settings(hide=True) # server acks my settings
def _apply_settings(self, settings, hide=False):
for setting, value in settings.items():
old_value = self.http2_settings[setting]
if not old_value:
old_value = '-'
self.http2_settings[setting] = value
frm = frame.SettingsFrame(flags=['ACK'])
self.send_frame(frm, hide)
def perform_server_connection_preface(self, force=False):
if force or not self.connection_preface_performed:
self.connection_preface_performed = True
magic_length = len(self.CLIENT_CONNECTION_PREFACE)
magic = self.tcp_handler.rfile.safe_read(magic_length)
assert magic == self.CLIENT_CONNECTION_PREFACE
frm = frame.SettingsFrame(settings={
frame.SettingsFrame.ENABLE_PUSH: 0,
frame.SettingsFrame.MAX_CONCURRENT_STREAMS: 1,
})
self.send_frame(frm, hide=True)
self._receive_settings(hide=True)