def _key_buckets_init(self, buckets=1, key_hash=sha1):
self.folder_buckets = buckets
if buckets != 1:
self._key_hash = sha1
self._key_hash_max = khm = 1 << (8 * sha1('').digest_size)
self._key_hash_max = khm - (khm % buckets) - 1
self._bucket_format = '{{:0{}d}}'.format(len(str(buckets)))
def _permuted(server):
seed = server.get_permutation_seed()
return sha1(peer_selection_index + seed).digest()
def _permuted(server):
seed = server.get_permutation_seed()
is_unpreferred = server not in preferred_servers
return (is_unpreferred, sha1(peer_selection_index + seed).digest())
def get_servers_for_index(self, key):
return sorted(self.client._servers,
key=lambda x: sha1(key+x[0]).digest())
def get_servers_for_index(self, peer_selection_index):
# first cut: return a list of (peerid, versioned-rref) tuples
assert self.permute_peers == True
servers = self.get_all_servers()
key = peer_selection_index
return sorted(servers, key=lambda x: sha1(key+x[0]).digest())
