def _lookup(self, name):
"""
Search for peers where a given file is stored and then request these peers for the file until the file
is entirely stored locally.
:param name: name of the file to obtain.
:return: False, True if the file has been downloaded or False if not.
"""
_, available_peers = self._search(name, pprint=False)
file_obtained = False
while not file_obtained and available_peers:
peer_id = available_peers.pop(0)
# Establish connection to the peer to obtain file
peer_sock = self._get_peer_sock(peer_id)
self.logger.debug('peer_sock in lookup: %s', repr(peer_sock))
if peer_sock:
peer_exch = MessageExchanger(peer_sock)
peer_action = dict(type='obtain', name=name)
peer_exch.pkl_send(peer_action)
f_path = os.path.join(self.download_dir, name)
file_exists = peer_exch.pkl_recv()
if file_exists:
peer_exch.file_recv(f_path, show_progress=False)
file_obtained = True
return False, file_obtained
