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 #'the9ull.homelinux.org': {'h': '8082', 't': '50001'},
11 'electrum.coinwallet.me': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
12 'electrum.hachre.de': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
13 #'electrum.koh.ms': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
14 'electrum.novit.ro': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
15 'electrum.stepkrav.pw': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
16 #'ecdsa.org': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
17 #'electrum.mooo.com': {'h': '8081', 't': '50001'},
18 #'electrum.bitcoins.sk': {'h': '8081', 's': '50002', 't': '50001', 'g': '8'},
19 'electrum.no-ip.org': {'h': '80', 's': '50002', 't': '50001', 'g': '443'},
20 'electrum.drollette.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
21 'btc.it-zone.org': {'h': '80', 's': '110', 't': '50001', 'g': '443'},
22 #'electrum.yacoin.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
23 'electrum.be': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'}
30 def filter_protocol(servers, p):
32 for k, protocols in servers.items():
34 l.append( ':'.join([k, protocols[p], p]) )
38 def pick_random_server():
39 return random.choice( filter_protocol(DEFAULT_SERVERS,'s') )
42 class Network(threading.Thread):
44 def __init__(self, config):
45 threading.Thread.__init__(self)
48 self.lock = threading.Lock()
49 self.blockchain = Blockchain(config, self)
51 self.queue = Queue.Queue()
52 self.default_server = self.config.get('server')
56 self.irc_servers = [] # returned by interface (list from irc)
57 self.disconnected_servers = []
58 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
62 self.proxy = self.config.get('proxy')
66 dir_path = os.path.join( self.config.path, 'certs')
67 if not os.path.exists(dir_path):
70 # default subscriptions
71 self.subscriptions = {}
72 self.subscriptions[self.on_banner] = [('server.banner',[])]
73 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
76 def is_connected(self):
77 return self.interface and self.interface.is_connected
80 def send_subscriptions(self):
81 for cb, sub in self.subscriptions.items():
82 self.interface.send(sub, cb)
85 def subscribe(self, messages, callback):
87 if self.subscriptions.get(callback) is None:
88 self.subscriptions[callback] = []
89 for message in messages:
90 if message not in self.subscriptions[callback]:
91 self.subscriptions[callback].append(message)
93 if self.interface and self.interface.is_connected:
94 self.interface.send( messages, callback )
97 def register_callback(self, event, callback):
99 if not self.callbacks.get(event):
100 self.callbacks[event] = []
101 self.callbacks[event].append(callback)
104 def trigger_callback(self, event):
106 callbacks = self.callbacks.get(event,[])[:]
108 [callback() for callback in callbacks]
111 def random_server(self):
113 l = filter_protocol(self.get_servers(), self.protocol)
115 if s in self.disconnected_servers or s in self.interfaces.keys():
118 choice_list.append(s)
121 if not self.interfaces:
122 # we are probably offline, retry later
123 self.disconnected_servers = []
126 server = random.choice( choice_list )
130 def get_servers(self):
131 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
132 for s in self.recent_servers:
133 host, port, protocol = s.split(':')
135 out[host] = { protocol:port }
138 def start_interface(self, server):
139 if server in self.interfaces.keys():
141 i = interface.Interface({'server':server, 'path':self.config.path, 'proxy':self.proxy})
142 self.interfaces[server] = i
145 def start_random_interface(self):
146 server = self.random_server()
148 self.start_interface(server)
150 def start_interfaces(self):
151 if self.default_server:
152 self.start_interface(self.default_server)
153 self.interface = self.interfaces[self.default_server]
155 for i in range(NUM_SERVERS):
156 self.start_random_interface()
158 if not self.interface:
159 self.interface = self.interfaces.values()[0]
162 def start(self, wait=False):
163 self.start_interfaces()
164 threading.Thread.start(self)
166 self.interface.connect_event.wait()
167 return self.interface.is_connected
170 def wait_until_connected(self):
171 while not self.interface:
173 self.interface.connect_event.wait()
176 def set_parameters(self, server, proxy, auto_connect):
178 self.config.set_key("proxy", proxy, True)
181 self.config.set_key('auto_cycle', auto_connect, True)
183 self.config.set_key("server", server, True)
186 if not self.interface:
187 self.switch_to_random_interface()
189 if self.server_lag > 0:
190 self.interface.stop()
192 self.set_server(server)
195 def switch_to_random_interface(self):
197 self.switch_to_interface(random.choice(self.interfaces.values()))
199 def switch_to_interface(self, interface):
200 print_error("switching to", interface.server)
201 self.interface = interface
202 h = self.heights.get(self.interface.server)
204 self.server_lag = self.blockchain.height - h
205 self.config.set_key('server', self.interface.server, False)
206 self.send_subscriptions()
207 self.trigger_callback('connected')
210 def set_server(self, server):
211 if self.default_server == server and self.interface:
214 # stop the interface in order to terminate subscriptions
216 self.interface.stop()
219 self.trigger_callback('disconnecting')
221 self.default_server = server
222 self.config.set_key("server", server, True)
224 if server in self.interfaces.keys():
225 self.switch_to_interface( self.interfaces[server] )
227 self.start_interface(server)
228 self.interface = self.interfaces[server]
231 def add_recent_server(self, i):
234 if s in self.recent_servers:
235 self.recent_servers.remove(s)
236 self.recent_servers.insert(0,s)
237 self.recent_servers = self.recent_servers[0:20]
238 self.config.set_key('recent_servers', self.recent_servers)
241 def new_blockchain_height(self, blockchain_height, i):
242 if self.is_connected():
243 h = self.heights.get(self.interface.server)
245 self.server_lag = blockchain_height - h
246 if self.server_lag > 1:
247 print_error( "Server is lagging", blockchain_height, h)
248 if self.config.get('auto_cycle'):
249 self.set_server(i.server)
251 self.trigger_callback('updated')
255 self.blockchain.start()
260 while self.is_running():
262 i = self.queue.get(timeout = 30)
264 if len(self.interfaces) < NUM_SERVERS:
265 self.start_random_interface()
269 self.add_recent_server(i)
270 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
271 if i == self.interface:
272 print_error('sending subscriptions to', self.interface.server)
273 self.send_subscriptions()
274 self.trigger_callback('connected')
276 self.disconnected_servers.append(i.server)
277 self.interfaces.pop(i.server)
278 if i.server in self.heights:
279 self.heights.pop(i.server)
280 if i == self.interface:
281 self.interface = None
282 self.trigger_callback('disconnected')
284 if self.interface is None and self.config.get('auto_cycle'):
285 self.switch_to_random_interface()
288 def on_header(self, i, r):
289 result = r.get('result')
290 if not result: return
291 self.heights[i.server] = result.get('block_height')
292 self.blockchain.queue.put((i,result))
294 if i == self.interface:
295 self.server_lag = self.blockchain.height - self.heights[i.server]
297 print "on_header: lag", self.server_lag
298 self.trigger_callback('updated')
301 def on_peers(self, i, r):
303 self.irc_servers = self.parse_servers(r.get('result'))
304 self.trigger_callback('peers')
306 def on_banner(self, i, r):
307 self.banner = r.get('result')
308 self.trigger_callback('banner')
311 with self.lock: self.running = False
313 def is_running(self):
314 with self.lock: return self.running
317 def synchronous_get(self, requests, timeout=100000000):
318 queue = Queue.Queue()
319 ids = self.interface.send(requests, lambda i,r: queue.put(r))
323 r = queue.get(True, timeout)
327 res[_id] = r.get('result')
334 def retrieve_transaction(self, tx_hash, tx_height=0):
336 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
338 return transaction.Transaction(r)
341 def parse_servers(self, result):
342 """ parse servers list into dict format"""
343 from version import PROTOCOL_VERSION
352 if re.match("[stgh]\d*", v):
353 protocol, port = v[0], v[1:]
354 if port == '': port = DEFAULT_PORTS[protocol]
356 elif re.match("v(.?)+", v):
358 elif re.match("p\d*", v):
359 pruning_level = v[1:]
360 if pruning_level == '': pruning_level = '0'
362 is_recent = float(version)>=float(PROTOCOL_VERSION)
366 if out and is_recent:
367 out['pruning'] = pruning_level
375 if __name__ == "__main__":
377 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
378 network = Network(config)