def load_user(record_hash):
"""
Load a user record from the storage implementation with the given hex string hash,
The user record hash should have been loaded from the blockchain, and thereby be the
authentic hash.
Return the user record on success
Return None on error
"""
user_json = storage.get_immutable_data(record_hash)
if user_json is None:
log.error("Failed to load user record '%s'" % record_hash)
return None
# verify integrity
user_record_hash = storage.get_data_hash(user_json)
if user_record_hash != record_hash:
log.error(
"Profile hash mismatch: expected '%s', got '%s'" % record_hash,
user_record_hash)
return None
user = user_db.parse_user(user_json)
return user
def read_file(file_name):
""" Read CSV file containing users
:param file_name: input file name
:returns: dictionary with user ids as keys, and User objects as values
"""
dict = {}
# read file, split lines
with codecs.open(file_name, "r", "utf-8") as f:
lines = f.read().split('\n')
for line in lines:
if line.strip():
try:
# parse user
u = user.parse_user(line)
# put it in dictionary
dict[u.id] = u
except ValueError, e:
print 'Error: ' + str(e) # just print and continue
return UserGraph(dict)
def test_users(self):
users = [user.parse_user(x) for x in self.user_strings]
# test __str__
self.assertEqual([str(u) for u in users], self.user_strings)
# test user graph
dict = {u.id:u for u in users}
graph = user_graph.UserGraph(dict)
self.assertEqual(graph.shortest_distance(1,2), [2])
self.assertEqual(graph.shortest_distance(1,4), [2,3,4])
self.assertEqual(graph.shortest_distance(4,1), [3,2,1])
self.assertEqual(graph.shortest_distance(5,1), None)
# test shortest_distance2
#for i in range(1,6):
# for j in range(1,6):
# self.assertEqual(graph.shortest_distance(i,j), graph.shortest_distance2(i,j))
# test friends
self.assertEqual(graph.is_friend(1,2), True)
self.assertEqual(graph.is_friend(1,3), False)
graph2 = user_graph.read_file('data.txt')
for i in range(1,20):
for j in reversed(range(1,20)):
self.assertEqual(graph2.shortest_distance(i,j), graph2.shortest_distance_old(i,j))
def load_user(record_hash):
"""
Load a user record from the storage implementation with the given hex string hash,
The user record hash should have been loaded from the blockchain, and thereby be the
authentic hash.
Return the user record on success
Return None on error
"""
user_json = storage.get_immutable_data(record_hash)
if user_json is None:
log.error("Failed to load user record '%s'" % record_hash)
return None
# verify integrity
user_record_hash = storage.get_data_hash(user_json)
if user_record_hash != record_hash:
log.error("Profile hash mismatch: expected '%s', got '%s'" % record_hash, user_record_hash)
return None
user = user_db.parse_user(user_json)
return user
def update(name, user_json_or_hash, privatekey, txid=None, proxy=None, tx_only=False, public_key=None, subsidy_key=None):
"""
update
Optionally supply a txid. The reason for doing so is to try to replicate user
data to new storage systems, or to recover from a transient error encountered
earlier.
"""
# sanity check
if privatekey is None and public_key is None:
return {'error': 'Missing public and private key'}
if proxy is None:
proxy = get_default_proxy()
user_record_hash = None
user_data = None
# 160-bit hex string?
if len(user_json_or_hash) == 40 and len(user_json_or_hash.translate(None, "0123456789ABCDEFabcdef")) == 0:
user_record_hash = user_json_or_hash.lower()
else:
# user record json. hash it
user_data = user_db.parse_user(user_json_or_hash)
if user_data is None:
return {'error': 'Invalid user record JSON'}
user_record_hash = pybitcoin.hash.hex_hash160(user_db.serialize_user(user_data))
# go get the current user record
current_user_record = get_name_record( name, create_if_absent=True )
if current_user_record is None:
return {'error': 'No such user'}
if current_user_record.has_key('error'):
# some other error
return current_user_record
result = {}
old_hash = pybitcoin.hash.hex_hash160(user_db.serialize_user(user_data))
# only want transaction?
if tx_only:
if privatekey is None and public_key is not None and subsidy_key is not None:
return proxy.update_tx_subsidized( name, user_record_hash, public_key, subsidy_key )
else:
return proxy.update_tx( name, user_record_hash, privatekey )
# no transaction: go put one
if txid is None:
if tx_only:
result = proxy.update_tx( name, user_record_hash, privatekey )
return result
else:
result = proxy.update(name, user_record_hash, privatekey)
if 'error' in result:
# failed
return result
if 'transaction_hash' not in result:
# failed
result['error'] = "No transaction hash given"
return result
txid = result['transaction_hash']
else:
# embed the txid into the result nevertheless
result['transaction_hash'] = txid
# store new user data
rc = True
new_data_hash = None
if user_data is not None:
rc, new_data_hash = store_name_record(user_data, txid)
else:
# was already a hash
new_data_hash = user_json_or_hash
if not rc:
result['error'] = "Failed to store updated user record."
return result
result['status'] = True
result['value_hash'] = new_data_hash
result['transaction_hash'] = txid
return result
def update(name,
user_json_or_hash,
privatekey,
txid=None,
proxy=None,
tx_only=False,
public_key=None,
subsidy_key=None):
"""
update
Optionally supply a txid. The reason for doing so is to try to replicate user
data to new storage systems, or to recover from a transient error encountered
earlier.
"""
# sanity check
if privatekey is None and public_key is None:
return {'error': 'Missing public and private key'}
if proxy is None:
proxy = get_default_proxy()
user_record_hash = None
user_data = None
# 160-bit hex string?
if len(user_json_or_hash) == 40 and len(
user_json_or_hash.translate(None, "0123456789ABCDEFabcdef")) == 0:
user_record_hash = user_json_or_hash.lower()
else:
# user record json. hash it
user_data = user_db.parse_user(user_json_or_hash)
if user_data is None:
return {'error': 'Invalid user record JSON'}
user_record_hash = pybitcoin.hash.hex_hash160(
user_db.serialize_user(user_data))
# go get the current user record
current_user_record = get_name_record(name, create_if_absent=True)
if current_user_record is None:
return {'error': 'No such user'}
if current_user_record.has_key('error'):
# some other error
return current_user_record
result = {}
old_hash = pybitcoin.hash.hex_hash160(user_db.serialize_user(user_data))
# only want transaction?
if tx_only:
if privatekey is None and public_key is not None and subsidy_key is not None:
return proxy.update_tx_subsidized(name, user_record_hash,
public_key, subsidy_key)
else:
return proxy.update_tx(name, user_record_hash, privatekey)
# no transaction: go put one
if txid is None:
if tx_only:
result = proxy.update_tx(name, user_record_hash, privatekey)
return result
else:
result = proxy.update(name, user_record_hash, privatekey)
if 'error' in result:
# failed
return result
if 'transaction_hash' not in result:
# failed
result['error'] = "No transaction hash given"
return result
txid = result['transaction_hash']
else:
# embed the txid into the result nevertheless
result['transaction_hash'] = txid
# store new user data
rc = True
new_data_hash = None
if user_data is not None:
rc, new_data_hash = store_name_record(user_data, txid)
else:
# was already a hash
new_data_hash = user_json_or_hash
if not rc:
result['error'] = "Failed to store updated user record."
return result
result['status'] = True
result['value_hash'] = new_data_hash
result['transaction_hash'] = txid
return result
