import threading, time, Queue, os, sys, shutil, random
from util import user_dir, appdata_dir, print_error, print_msg
from bitcoin import *
import interface
from blockchain import Blockchain
DEFAULT_PORTS = {'t':'50001', 's':'50002', 'h':'8081', 'g':'8082'}
DEFAULT_SERVERS = {
#'electrum.coinwallet.me': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
'electrum.hachre.de': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
'electrum.novit.ro': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
'electrum.stepkrav.pw': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
#'ecdsa.org': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
'electrum.no-ip.org': {'h': '80', 's': '50002', 't': '50001', 'g': '443'},
'electrum.drollette.com': {'h': '5000', 's': '50002', 't': '50001', 'g': '8082'},
'btc.it-zone.org': {'h': '80', 's': '110', 't': '50001', 'g': '443'},
'btc.medoix.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
'electrum.stupidfoot.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
#'electrum.pdmc.net': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
'electrum.be': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'}
}
def filter_protocol(servers, p):
l = []
for k, protocols in servers.items():
if p in protocols:
l.append( ':'.join([k, protocols[p], p]) )
return l
def pick_random_server(p='s'):
return random.choice( filter_protocol(DEFAULT_SERVERS,p) )
from simple_config import SimpleConfig
class Network(threading.Thread):
def __init__(self, config = {}):
threading.Thread.__init__(self)
self.daemon = True
self.config = SimpleConfig(config) if type(config) == type({}) else config
self.lock = threading.Lock()
self.num_server = 8 if not self.config.get('oneserver') else 0
self.blockchain = Blockchain(self.config, self)
self.interfaces = {}
self.queue = Queue.Queue()
self.callbacks = {}
self.protocol = self.config.get('protocol','s')
# Server for addresses and transactions
self.default_server = self.config.get('server')
if not self.default_server:
self.default_server = pick_random_server(self.protocol)
self.irc_servers = [] # returned by interface (list from irc)
self.disconnected_servers = []
self.recent_servers = self.config.get('recent_servers',[]) # successful connections
self.banner = ''
self.interface = None
self.proxy = self.config.get('proxy')
self.heights = {}
self.server_lag = 0
dir_path = os.path.join( self.config.path, 'certs')
if not os.path.exists(dir_path):
os.mkdir(dir_path)
# default subscriptions
self.subscriptions = {}
self.subscriptions[self.on_banner] = [('server.banner',[])]
self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
def is_connected(self):
return self.interface and self.interface.is_connected
def send_subscriptions(self):
for cb, sub in self.subscriptions.items():
self.interface.send(sub, cb)
def subscribe(self, messages, callback):
with self.lock:
if self.subscriptions.get(callback) is None:
self.subscriptions[callback] = []
for message in messages:
if message not in self.subscriptions[callback]:
self.subscriptions[callback].append(message)
if self.interface and self.interface.is_connected:
self.interface.send( messages, callback )
def send(self, messages, callback):
if self.interface and self.interface.is_connected:
self.interface.send( messages, callback )
return True
else:
return False
def register_callback(self, event, callback):
with self.lock:
if not self.callbacks.get(event):
self.callbacks[event] = []
self.callbacks[event].append(callback)
def trigger_callback(self, event):
with self.lock:
callbacks = self.callbacks.get(event,[])[:]
if callbacks:
[callback() for callback in callbacks]
def random_server(self):
choice_list = []
l = filter_protocol(self.get_servers(), self.protocol)
for s in l:
if s in self.disconnected_servers or s in self.interfaces.keys():
continue
else:
choice_list.append(s)
if not choice_list:
if not self.interfaces:
# we are probably offline, retry later
self.disconnected_servers = []
return
server = random.choice( choice_list )
return server
def get_servers(self):
out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
for s in self.recent_servers:
host, port, protocol = s.split(':')
if host not in out:
out[host] = { protocol:port }
return out
def start_interface(self, server):
if server in self.interfaces.keys():
return
i = interface.Interface(server, self.config)
self.interfaces[server] = i
i.start(self.queue)
def start_random_interface(self):
server = self.random_server()
if server:
self.start_interface(server)
def start_interfaces(self):
self.start_interface(self.default_server)
self.interface = self.interfaces[self.default_server]
for i in range(self.num_server):
self.start_random_interface()
if not self.interface:
self.interface = self.interfaces.values()[0]
def start(self, wait=False):
self.start_interfaces()
threading.Thread.start(self)
if wait:
self.interface.connect_event.wait()
return self.interface.is_connected
def wait_until_connected(self):
while not self.interface:
time.sleep(1)
self.interface.connect_event.wait()
def set_parameters(self, host, port, protocol, proxy, auto_connect):
self.config.set_key('auto_cycle', auto_connect, True)
self.config.set_key("proxy", proxy, True)
self.config.set_key("protocol", protocol, True)
server = ':'.join([ host, port, protocol ])
self.config.set_key("server", server, True)
if self.proxy != proxy or self.protocol != protocol:
self.proxy = proxy
self.protocol = protocol
for i in self.interfaces.values(): i.stop()
if auto_connect:
self.interface = None
return
if auto_connect:
if not self.interface:
self.switch_to_random_interface()
else:
if self.server_lag > 0:
self.stop_interface()
else:
self.set_server(server)
def switch_to_random_interface(self):
if self.interfaces:
self.switch_to_interface(random.choice(self.interfaces.values()))
def switch_to_interface(self, interface):
assert self.interface is None
server = interface.server
print_error("switching to", server)
self.interface = interface
h = self.heights.get(server)
if h:
self.server_lag = self.blockchain.height() - h
self.config.set_key('server', server, False)
self.default_server = server
self.send_subscriptions()
self.trigger_callback('connected')
def stop_interface(self):
self.interface.stop()
self.interface = None
def set_server(self, server):
if self.default_server == server and self.interface:
return
if self.protocol != server.split(':')[2]:
return
# stop the interface in order to terminate subscriptions
if self.interface:
self.stop_interface()
# notify gui
self.trigger_callback('disconnecting')
# start interface
self.default_server = server
self.config.set_key("server", server, True)
if server in self.interfaces.keys():
self.switch_to_interface( self.interfaces[server] )
else:
self.start_interface(server)
self.interface = self.interfaces[server]
def add_recent_server(self, i):
# list is ordered
s = i.server
if s in self.recent_servers:
self.recent_servers.remove(s)
self.recent_servers.insert(0,s)
self.recent_servers = self.recent_servers[0:20]
self.config.set_key('recent_servers', self.recent_servers)
def new_blockchain_height(self, blockchain_height, i):
if self.is_connected():
h = self.heights.get(self.interface.server)
if h:
self.server_lag = blockchain_height - h
if self.server_lag > 1:
print_error( "Server is lagging", blockchain_height, h)
if self.config.get('auto_cycle'):
self.set_server(i.server)
else:
print_error('no height for main interface')
self.trigger_callback('updated')
def run(self):
self.blockchain.start()
with self.lock:
self.running = True
while self.is_running():
try:
i = self.queue.get(timeout = 30 if self.interfaces else 3)
except Queue.Empty:
if len(self.interfaces) < self.num_server:
self.start_random_interface()
continue
if i.is_connected:
self.add_recent_server(i)
i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
if i == self.interface:
print_error('sending subscriptions to', self.interface.server)
self.send_subscriptions()
self.trigger_callback('connected')
else:
self.disconnected_servers.append(i.server)
self.interfaces.pop(i.server)
if i.server in self.heights:
self.heights.pop(i.server)
if i == self.interface:
self.interface = None
self.trigger_callback('disconnected')
if self.interface is None and self.config.get('auto_cycle'):
self.switch_to_random_interface()
def on_header(self, i, r):
result = r.get('result')
if not result: return
height = result.get('block_height')
self.heights[i.server] = height
# notify blockchain about the new height
self.blockchain.queue.put((i,result))
if i == self.interface:
self.server_lag = self.blockchain.height() - height
if self.server_lag > 1 and self.config.get('auto_cycle'):
print_error( "Server lagging, stopping interface")
self.stop_interface()
self.trigger_callback('updated')
def on_peers(self, i, r):
if not r: return
self.irc_servers = self.parse_servers(r.get('result'))
self.trigger_callback('peers')
def on_banner(self, i, r):
self.banner = r.get('result')
self.trigger_callback('banner')
def stop(self):
with self.lock: self.running = False
def is_running(self):
with self.lock: return self.running
def synchronous_get(self, requests, timeout=100000000):
queue = Queue.Queue()
ids = self.interface.send(requests, lambda i,r: queue.put(r))
id2 = ids[:]
res = {}
while ids:
r = queue.get(True, timeout)
_id = r.get('id')
if _id in ids:
ids.remove(_id)
res[_id] = r.get('result')
out = []
for _id in id2:
out.append(res[_id])
return out
def retrieve_transaction(self, tx_hash, tx_height=0):
import transaction
r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
if r:
return transaction.Transaction(r)
def parse_servers(self, result):
""" parse servers list into dict format"""
from version import PROTOCOL_VERSION
servers = {}
for item in result:
host = item[1]
out = {}
version = None
pruning_level = '-'
if len(item) > 2:
for v in item[2]:
if re.match("[stgh]\d*", v):
protocol, port = v[0], v[1:]
if port == '': port = DEFAULT_PORTS[protocol]
out[protocol] = port
elif re.match("v(.?)+", v):
version = v[1:]
elif re.match("p\d*", v):
pruning_level = v[1:]
if pruning_level == '': pruning_level = '0'
try:
is_recent = float(version)>=float(PROTOCOL_VERSION)
except Exception:
is_recent = False
if out and is_recent:
out['pruning'] = pruning_level
servers[host] = out
return servers
if __name__ == "__main__":
import simple_config
config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
network = Network(config)
network.start()
while 1:
time.sleep(1)