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 'btc.it-zone.org': {'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 send_subscriptions(self):
86 for cb, sub in self.subscriptions.items():
87 self.interface.send(sub, cb)
90 def subscribe(self, messages, callback):
92 if self.subscriptions.get(callback) is None:
93 self.subscriptions[callback] = []
94 for message in messages:
95 if message not in self.subscriptions[callback]:
96 self.subscriptions[callback].append(message)
98 if self.is_connected():
99 self.interface.send( messages, callback )
102 def send(self, messages, callback):
103 if self.is_connected():
104 self.interface.send( messages, callback )
110 def register_callback(self, event, callback):
112 if not self.callbacks.get(event):
113 self.callbacks[event] = []
114 self.callbacks[event].append(callback)
117 def trigger_callback(self, event):
119 callbacks = self.callbacks.get(event,[])[:]
121 [callback() for callback in callbacks]
124 def random_server(self):
126 l = filter_protocol(self.get_servers(), self.protocol)
128 if s in self.pending_servers or s in self.disconnected_servers or s in self.interfaces.keys():
131 choice_list.append(s)
134 if not self.interfaces:
135 # we are probably offline, retry later
136 self.disconnected_servers = set([])
139 server = random.choice( choice_list )
143 def get_servers(self):
144 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
145 for s in self.recent_servers:
146 host, port, protocol = s.split(':')
148 out[host] = { protocol:port }
151 def start_interface(self, server):
152 if server in self.interfaces.keys():
154 i = interface.Interface(server, self.config)
155 self.pending_servers.add(server)
159 def start_random_interface(self):
160 server = self.random_server()
162 self.start_interface(server)
164 def start_interfaces(self):
165 self.interface = self.start_interface(self.default_server)
167 for i in range(self.num_server):
168 self.start_random_interface()
171 def start(self, wait=False):
172 self.start_interfaces()
173 threading.Thread.start(self)
175 return self.wait_until_connected()
177 def wait_until_connected(self):
178 "wait until connection status is known"
179 if self.config.get('auto_cycle'):
180 while not self.is_connected():
183 self.interface.connect_event.wait()
185 return self.interface.is_connected
188 def set_parameters(self, host, port, protocol, proxy, auto_connect):
190 self.config.set_key('auto_cycle', auto_connect, True)
191 self.config.set_key("proxy", proxy, True)
192 self.config.set_key("protocol", protocol, True)
193 server = ':'.join([ host, port, protocol ])
194 self.config.set_key("server", server, True)
196 if self.proxy != proxy or self.protocol != protocol:
198 self.protocol = protocol
199 for i in self.interfaces.values(): i.stop()
201 #self.interface = None
205 if not self.interface.s_connected:
206 self.switch_to_random_interface()
208 if self.server_lag > 0:
209 self.stop_interface()
211 self.set_server(server)
214 def switch_to_random_interface(self):
216 self.switch_to_interface(random.choice(self.interfaces.values()))
218 def switch_to_interface(self, interface):
219 assert not self.interface.is_connected
220 server = interface.server
221 print_error("switching to", server)
222 self.interface = interface
223 h = self.heights.get(server)
225 self.server_lag = self.blockchain.height() - h
226 self.config.set_key('server', server, False)
227 self.default_server = server
228 self.send_subscriptions()
229 self.trigger_callback('connected')
232 def stop_interface(self):
233 self.interface.stop()
234 #self.interface = None
236 def set_server(self, server):
237 if self.default_server == server and self.interface.is_connected:
240 if self.protocol != server.split(':')[2]:
243 # stop the interface in order to terminate subscriptions
244 if self.interface.is_connected:
245 self.stop_interface()
248 self.trigger_callback('disconnecting')
250 self.default_server = server
251 self.config.set_key("server", server, True)
253 if server in self.interfaces.keys():
254 self.switch_to_interface( self.interfaces[server] )
256 self.interface = self.start_interface(server)
259 def add_recent_server(self, i):
262 if s in self.recent_servers:
263 self.recent_servers.remove(s)
264 self.recent_servers.insert(0,s)
265 self.recent_servers = self.recent_servers[0:20]
266 self.config.set_key('recent_servers', self.recent_servers)
269 def new_blockchain_height(self, blockchain_height, i):
270 if self.is_connected():
271 h = self.heights.get(self.interface.server)
273 self.server_lag = blockchain_height - h
274 if self.server_lag > 1:
275 print_error( "Server is lagging", blockchain_height, h)
276 if self.config.get('auto_cycle'):
277 self.set_server(i.server)
279 print_error('no height for main interface')
281 self.trigger_callback('updated')
285 self.blockchain.start()
290 while self.is_running():
292 i = self.queue.get(timeout = 30 if self.interfaces else 3)
294 if len(self.interfaces) < self.num_server:
295 self.start_random_interface()
298 self.pending_servers.remove(i.server)
300 #if i.server in self.interfaces: raise
301 self.interfaces[i.server] = i
302 self.add_recent_server(i)
303 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
304 if i == self.interface:
305 print_error('sending subscriptions to', self.interface.server)
306 self.send_subscriptions()
307 self.trigger_callback('connected')
309 self.disconnected_servers.add(i.server)
310 if i.server in self.interfaces:
311 self.interfaces.pop(i.server)
312 if i.server in self.heights:
313 self.heights.pop(i.server)
314 if i == self.interface:
315 #self.interface = None
316 self.trigger_callback('disconnected')
318 if not self.interface.is_connected and self.config.get('auto_cycle'):
319 self.switch_to_random_interface()
322 def on_header(self, i, r):
323 result = r.get('result')
324 if not result: return
325 height = result.get('block_height')
326 self.heights[i.server] = height
327 # notify blockchain about the new height
328 self.blockchain.queue.put((i,result))
330 if i == self.interface:
331 self.server_lag = self.blockchain.height() - height
332 if self.server_lag > 1 and self.config.get('auto_cycle'):
333 print_error( "Server lagging, stopping interface")
334 self.stop_interface()
336 self.trigger_callback('updated')
339 def on_peers(self, i, r):
341 self.irc_servers = self.parse_servers(r.get('result'))
342 self.trigger_callback('peers')
344 def on_banner(self, i, r):
345 self.banner = r.get('result')
346 self.trigger_callback('banner')
349 with self.lock: self.running = False
351 def is_running(self):
352 with self.lock: return self.running
355 def synchronous_get(self, requests, timeout=100000000):
356 queue = Queue.Queue()
357 ids = self.interface.send(requests, lambda i,r: queue.put(r))
361 r = queue.get(True, timeout)
365 res[_id] = r.get('result')
372 def retrieve_transaction(self, tx_hash, tx_height=0):
374 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
376 return transaction.Transaction(r)
379 def parse_servers(self, result):
380 """ parse servers list into dict format"""
381 from version import PROTOCOL_VERSION
390 if re.match("[stgh]\d*", v):
391 protocol, port = v[0], v[1:]
392 if port == '': port = DEFAULT_PORTS[protocol]
394 elif re.match("v(.?)+", v):
396 elif re.match("p\d*", v):
397 pruning_level = v[1:]
398 if pruning_level == '': pruning_level = '0'
400 is_recent = float(version)>=float(PROTOCOL_VERSION)
404 if out and is_recent:
405 out['pruning'] = pruning_level
413 if __name__ == "__main__":
415 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
416 network = Network(config)