def block():
global blockchain
ip = request.remote_addr
if ip != "127.0.0.1" and ip not in Variables.PEER_NODES:
Variables.PEER_NODES.append(ip)
if ip == '127.0.0.1':
raw = request.data.decode('utf-8')
parsed = xmltodict.parse(raw)
b = Block()
b.import_from_xml(parsed['block'])
print("I made", b)
blockchain.add(b)
#Distribute the block to our peers
for peer in Variables.PEER_NODES:
try:
url = "http://" + peer + ":" + str(Variables.PORT) + "/block"
xml = b.export_to_xml()
headers = {'Content-Type': 'application/xml'}
resp = requests.post(url, data=xml, headers=headers).text
except:
Variables.PEER_NODES.remove(peer)
else:
block_number = None
try:
block_number = int(request.args['block_number'])
except:
pass
if block_number is not None:
return blockchain.get(block_number).export_to_xml()
else:
raw = request.data.decode('utf-8')
parsed = xmltodict.parse(raw)
b = Block()
b.import_from_xml(parsed['block'])
print("receiv", b)
if Utility.validate(b):
blockchain.add(b)
global event
event.set()
else:
print("Block did not validate",ip)
return "0"
def find_new_chains():
func = inspect.currentframe().f_back.f_code
logging.info("Starting to find new chains")
# Get the blockchains of every other node
peers = variables.PEER_NODES
logging.debug("peers: {}".format(len(peers)))
other_chains = []
for node_url in peers:
blockchain_json = None
found_blockchain = []
url = "http://" + node_url + ":" + str(variables.PORT) + "/blocks"
try:
logging.debug("Attempting to access {}".format(node_url))
blockchain_json = requests.post(url)
except:
logging.warning("Failed to access {}, removing from peers".format(node_url))
variables.PEER_NODES.remove(node_url)
continue
# Convert the JSON object to a Python dictionary
if blockchain_json is not None:
blockchain_json = json.loads(blockchain_json.content)
for block_json in blockchain_json:
temp = Block()
temp.importjson(block_json)
if Utility.validate(temp):
logging.debug("Block validated, adding")
found_blockchain.append(temp)
else:
logging.warning("Block NOT valid, next peer")
continue
# Verify other node block is correct
logging.debug("Attempting to validate this: {}".format(found_blockchain))
validated = Utility.validate_blockchain(found_blockchain)
if validated:
logging.debug("Blockchain did validate")
other_chains.append(found_blockchain)
else:
logging.warning("Blockchain did not validate")
continue
logging.info("Ending find new chains")
return other_chains
