1 import threading, time, Queue, os, sys, shutil, random
2 from util import user_dir, appdata_dir, print_error, print_msg
5 from blockchain import Blockchain
7 DEFAULT_PORTS = {'t':'50001', 's':'50002', 'h':'8081', 'g':'8082'}
10 #'electrum.coinwallet.me': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
11 'electrum.hachre.de': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
12 'electrum.novit.ro': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
13 'electrum.stepkrav.pw': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
14 #'ecdsa.org': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
15 'electrum.no-ip.org': {'h': '80', 's': '50002', 't': '50001', 'g': '443'},
16 'electrum.drollette.com': {'h': '5000', 's': '50002', 't': '50001', 'g': '8082'},
17 'electrum.random.re': {'h': '80', 's': '110', 't': '50001', 'g': '443'},
18 'btc.medoix.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
19 'electrum.stupidfoot.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
20 #'electrum.pdmc.net': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
21 'electrum.be': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'}
27 def filter_protocol(servers, p):
29 for k, protocols in servers.items():
31 l.append( ':'.join([k, protocols[p], p]) )
35 def pick_random_server(p='s'):
36 return random.choice( filter_protocol(DEFAULT_SERVERS,p) )
38 from simple_config import SimpleConfig
40 class Network(threading.Thread):
42 def __init__(self, config = {}):
43 threading.Thread.__init__(self)
45 self.config = SimpleConfig(config) if type(config) == type({}) else config
46 self.lock = threading.Lock()
47 self.num_server = 8 if not self.config.get('oneserver') else 0
48 self.blockchain = Blockchain(self.config, self)
50 self.queue = Queue.Queue()
52 self.protocol = self.config.get('protocol','s')
55 # Server for addresses and transactions
56 self.default_server = self.config.get('server')
57 if not self.default_server:
58 self.default_server = pick_random_server(self.protocol)
60 self.irc_servers = [] # returned by interface (list from irc)
61 self.pending_servers = set([])
62 self.disconnected_servers = set([])
63 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
67 self.proxy = self.config.get('proxy')
71 dir_path = os.path.join( self.config.path, 'certs')
72 if not os.path.exists(dir_path):
75 # default subscriptions
76 self.subscriptions = {}
77 self.subscriptions[self.on_banner] = [('server.banner',[])]
78 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
81 def is_connected(self):
82 return self.interface and self.interface.is_connected
85 def is_up_to_date(self):
86 return self.interface.is_up_to_date()
89 def main_server(self):
90 return self.interface.server
93 def send_subscriptions(self):
94 for cb, sub in self.subscriptions.items():
95 self.interface.send(sub, cb)
98 def subscribe(self, messages, callback):
100 if self.subscriptions.get(callback) is None:
101 self.subscriptions[callback] = []
102 for message in messages:
103 if message not in self.subscriptions[callback]:
104 self.subscriptions[callback].append(message)
106 if self.is_connected():
107 self.interface.send( messages, callback )
110 def send(self, messages, callback):
111 if self.is_connected():
112 self.interface.send( messages, callback )
118 def register_callback(self, event, callback):
120 if not self.callbacks.get(event):
121 self.callbacks[event] = []
122 self.callbacks[event].append(callback)
125 def trigger_callback(self, event):
127 callbacks = self.callbacks.get(event,[])[:]
129 [callback() for callback in callbacks]
132 def random_server(self):
134 l = filter_protocol(self.get_servers(), self.protocol)
136 if s in self.pending_servers or s in self.disconnected_servers or s in self.interfaces.keys():
139 choice_list.append(s)
142 if not self.interfaces:
143 # we are probably offline, retry later
144 self.disconnected_servers = set([])
147 server = random.choice( choice_list )
151 def get_servers(self):
152 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
153 for s in self.recent_servers:
154 host, port, protocol = s.split(':')
156 out[host] = { protocol:port }
159 def start_interface(self, server):
160 if server in self.interfaces.keys():
162 i = interface.Interface(server, self.config)
163 self.pending_servers.add(server)
167 def start_random_interface(self):
168 server = self.random_server()
170 self.start_interface(server)
172 def start_interfaces(self):
173 self.interface = self.start_interface(self.default_server)
175 for i in range(self.num_server):
176 self.start_random_interface()
179 def start(self, wait=False):
180 self.start_interfaces()
181 threading.Thread.start(self)
183 return self.wait_until_connected()
185 def wait_until_connected(self):
186 "wait until connection status is known"
187 if self.config.get('auto_cycle'):
188 # self.random_server() returns None if all servers have been tried
189 while not self.is_connected() and self.random_server():
192 self.interface.connect_event.wait()
194 return self.interface.is_connected
197 def set_parameters(self, host, port, protocol, proxy, auto_connect):
199 self.config.set_key('auto_cycle', auto_connect, True)
200 self.config.set_key("proxy", proxy, True)
201 self.config.set_key("protocol", protocol, True)
202 server = ':'.join([ host, port, protocol ])
203 self.config.set_key("server", server, True)
205 if self.proxy != proxy or self.protocol != protocol:
207 self.protocol = protocol
208 for i in self.interfaces.values(): i.stop()
210 #self.interface = None
214 if not self.interface.is_connected:
215 self.switch_to_random_interface()
217 if self.server_lag > 0:
218 self.stop_interface()
220 self.set_server(server)
223 def switch_to_random_interface(self):
225 self.switch_to_interface(random.choice(self.interfaces.values()))
227 def switch_to_interface(self, interface):
228 assert not self.interface.is_connected
229 server = interface.server
230 print_error("switching to", server)
231 self.interface = interface
232 h = self.heights.get(server)
234 self.server_lag = self.blockchain.height() - h
235 self.config.set_key('server', server, False)
236 self.default_server = server
237 self.send_subscriptions()
238 self.trigger_callback('connected')
241 def stop_interface(self):
242 self.interface.stop()
245 def set_server(self, server):
246 if self.default_server == server and self.interface.is_connected:
249 if self.protocol != server.split(':')[2]:
252 # stop the interface in order to terminate subscriptions
253 if self.interface.is_connected:
254 self.stop_interface()
257 self.trigger_callback('disconnecting')
259 self.default_server = server
260 self.config.set_key("server", server, True)
262 if server in self.interfaces.keys():
263 self.switch_to_interface( self.interfaces[server] )
265 self.interface = self.start_interface(server)
268 def add_recent_server(self, i):
271 if s in self.recent_servers:
272 self.recent_servers.remove(s)
273 self.recent_servers.insert(0,s)
274 self.recent_servers = self.recent_servers[0:20]
275 self.config.set_key('recent_servers', self.recent_servers)
278 def new_blockchain_height(self, blockchain_height, i):
279 if self.is_connected():
280 h = self.heights.get(self.interface.server)
282 self.server_lag = blockchain_height - h
283 if self.server_lag > 1:
284 print_error( "Server is lagging", blockchain_height, h)
285 if self.config.get('auto_cycle'):
286 self.set_server(i.server)
288 print_error('no height for main interface')
290 self.trigger_callback('updated')
294 self.blockchain.start()
299 while self.is_running():
301 i = self.queue.get(timeout = 30 if self.interfaces else 3)
303 if len(self.interfaces) < self.num_server:
304 self.start_random_interface()
307 if i.server in self.pending_servers:
308 self.pending_servers.remove(i.server)
311 #if i.server in self.interfaces: raise
312 self.interfaces[i.server] = i
313 self.add_recent_server(i)
314 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
315 if i == self.interface:
316 print_error('sending subscriptions to', self.interface.server)
317 self.send_subscriptions()
318 self.trigger_callback('connected')
320 self.disconnected_servers.add(i.server)
321 if i.server in self.interfaces:
322 self.interfaces.pop(i.server)
323 if i.server in self.heights:
324 self.heights.pop(i.server)
325 if i == self.interface:
326 #self.interface = None
327 self.trigger_callback('disconnected')
329 if not self.interface.is_connected and self.config.get('auto_cycle'):
330 self.switch_to_random_interface()
333 def on_header(self, i, r):
334 result = r.get('result')
335 if not result: return
336 height = result.get('block_height')
337 self.heights[i.server] = height
338 # notify blockchain about the new height
339 self.blockchain.queue.put((i,result))
341 if i == self.interface:
342 self.server_lag = self.blockchain.height() - height
343 if self.server_lag > 1 and self.config.get('auto_cycle'):
344 print_error( "Server lagging, stopping interface")
345 self.stop_interface()
347 self.trigger_callback('updated')
350 def on_peers(self, i, r):
352 self.irc_servers = self.parse_servers(r.get('result'))
353 self.trigger_callback('peers')
355 def on_banner(self, i, r):
356 self.banner = r.get('result')
357 self.trigger_callback('banner')
360 with self.lock: self.running = False
362 def is_running(self):
363 with self.lock: return self.running
366 def synchronous_get(self, requests, timeout=100000000):
367 queue = Queue.Queue()
368 ids = self.interface.send(requests, lambda i,r: queue.put(r))
372 r = queue.get(True, timeout)
376 res[_id] = r.get('result')
383 #def retrieve_transaction(self, tx_hash, tx_height=0):
385 # r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
387 # return transaction.Transaction(r)
390 def parse_servers(self, result):
391 """ parse servers list into dict format"""
392 from version import PROTOCOL_VERSION
401 if re.match("[stgh]\d*", v):
402 protocol, port = v[0], v[1:]
403 if port == '': port = DEFAULT_PORTS[protocol]
405 elif re.match("v(.?)+", v):
407 elif re.match("p\d*", v):
408 pruning_level = v[1:]
409 if pruning_level == '': pruning_level = '0'
411 is_recent = float(version)>=float(PROTOCOL_VERSION)
415 if out and is_recent:
416 out['pruning'] = pruning_level
424 if __name__ == "__main__":
426 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
427 network = Network(config)