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.disconnected_servers = []
62 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
66 self.proxy = self.config.get('proxy')
70 dir_path = os.path.join( self.config.path, 'certs')
71 if not os.path.exists(dir_path):
74 # default subscriptions
75 self.subscriptions = {}
76 self.subscriptions[self.on_banner] = [('server.banner',[])]
77 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
80 def is_connected(self):
81 return self.interface and self.interface.is_connected
84 def send_subscriptions(self):
85 for cb, sub in self.subscriptions.items():
86 self.interface.send(sub, cb)
89 def subscribe(self, messages, callback):
91 if self.subscriptions.get(callback) is None:
92 self.subscriptions[callback] = []
93 for message in messages:
94 if message not in self.subscriptions[callback]:
95 self.subscriptions[callback].append(message)
97 if self.interface and self.interface.is_connected:
98 self.interface.send( messages, callback )
101 def send(self, messages, callback):
102 if self.interface and self.interface.is_connected:
103 self.interface.send( messages, callback )
109 def register_callback(self, event, callback):
111 if not self.callbacks.get(event):
112 self.callbacks[event] = []
113 self.callbacks[event].append(callback)
116 def trigger_callback(self, event):
118 callbacks = self.callbacks.get(event,[])[:]
120 [callback() for callback in callbacks]
123 def random_server(self):
125 l = filter_protocol(self.get_servers(), self.protocol)
127 if s in self.disconnected_servers or s in self.interfaces.keys():
130 choice_list.append(s)
133 if not self.interfaces:
134 # we are probably offline, retry later
135 self.disconnected_servers = []
138 server = random.choice( choice_list )
142 def get_servers(self):
143 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
144 for s in self.recent_servers:
145 host, port, protocol = s.split(':')
147 out[host] = { protocol:port }
150 def start_interface(self, server):
151 if server in self.interfaces.keys():
153 i = interface.Interface(server, self.config)
154 self.interfaces[server] = i
157 def start_random_interface(self):
158 server = self.random_server()
160 self.start_interface(server)
162 def start_interfaces(self):
163 self.start_interface(self.default_server)
164 self.interface = self.interfaces[self.default_server]
166 for i in range(self.num_server):
167 self.start_random_interface()
169 if not self.interface:
170 self.interface = self.interfaces.values()[0]
173 def start(self, wait=False):
174 self.start_interfaces()
175 threading.Thread.start(self)
177 self.interface.connect_event.wait()
178 return self.interface.is_connected
181 def wait_until_connected(self):
182 while not self.interface:
184 self.interface.connect_event.wait()
187 def set_parameters(self, host, port, protocol, proxy, auto_connect):
189 self.config.set_key('auto_cycle', auto_connect, True)
190 self.config.set_key("proxy", proxy, True)
191 self.config.set_key("protocol", protocol, True)
192 server = ':'.join([ host, port, protocol ])
193 self.config.set_key("server", server, True)
195 if self.proxy != proxy or self.protocol != protocol:
197 self.protocol = protocol
198 for i in self.interfaces.values(): i.stop()
200 self.interface = None
204 if not self.interface:
205 self.switch_to_random_interface()
207 if self.server_lag > 0:
208 self.stop_interface()
210 self.set_server(server)
213 def switch_to_random_interface(self):
215 self.switch_to_interface(random.choice(self.interfaces.values()))
217 def switch_to_interface(self, interface):
218 assert self.interface is None
219 server = interface.server
220 print_error("switching to", server)
221 self.interface = interface
222 h = self.heights.get(server)
224 self.server_lag = self.blockchain.height() - h
225 self.config.set_key('server', server, False)
226 self.default_server = server
227 self.send_subscriptions()
228 self.trigger_callback('connected')
231 def stop_interface(self):
232 self.interface.stop()
233 self.interface = None
235 def set_server(self, server):
236 if self.default_server == server and self.interface:
239 if self.protocol != server.split(':')[2]:
242 # stop the interface in order to terminate subscriptions
244 self.stop_interface()
247 self.trigger_callback('disconnecting')
249 self.default_server = server
250 self.config.set_key("server", server, True)
252 if server in self.interfaces.keys():
253 self.switch_to_interface( self.interfaces[server] )
255 self.start_interface(server)
256 self.interface = self.interfaces[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()
299 self.add_recent_server(i)
300 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
301 if i == self.interface:
302 print_error('sending subscriptions to', self.interface.server)
303 self.send_subscriptions()
304 self.trigger_callback('connected')
306 self.disconnected_servers.append(i.server)
307 self.interfaces.pop(i.server)
308 if i.server in self.heights:
309 self.heights.pop(i.server)
310 if i == self.interface:
311 self.interface = None
312 self.trigger_callback('disconnected')
314 if self.interface is None and self.config.get('auto_cycle'):
315 self.switch_to_random_interface()
318 def on_header(self, i, r):
319 result = r.get('result')
320 if not result: return
321 height = result.get('block_height')
322 self.heights[i.server] = height
323 # notify blockchain about the new height
324 self.blockchain.queue.put((i,result))
326 if i == self.interface:
327 self.server_lag = self.blockchain.height() - height
328 if self.server_lag > 1 and self.config.get('auto_cycle'):
329 print_error( "Server lagging, stopping interface")
330 self.stop_interface()
332 self.trigger_callback('updated')
335 def on_peers(self, i, r):
337 self.irc_servers = self.parse_servers(r.get('result'))
338 self.trigger_callback('peers')
340 def on_banner(self, i, r):
341 self.banner = r.get('result')
342 self.trigger_callback('banner')
345 with self.lock: self.running = False
347 def is_running(self):
348 with self.lock: return self.running
351 def synchronous_get(self, requests, timeout=100000000):
352 queue = Queue.Queue()
353 ids = self.interface.send(requests, lambda i,r: queue.put(r))
357 r = queue.get(True, timeout)
361 res[_id] = r.get('result')
368 def retrieve_transaction(self, tx_hash, tx_height=0):
370 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
372 return transaction.Transaction(r)
375 def parse_servers(self, result):
376 """ parse servers list into dict format"""
377 from version import PROTOCOL_VERSION
386 if re.match("[stgh]\d*", v):
387 protocol, port = v[0], v[1:]
388 if port == '': port = DEFAULT_PORTS[protocol]
390 elif re.match("v(.?)+", v):
392 elif re.match("p\d*", v):
393 pruning_level = v[1:]
394 if pruning_level == '': pruning_level = '0'
396 is_recent = float(version)>=float(PROTOCOL_VERSION)
400 if out and is_recent:
401 out['pruning'] = pruning_level
409 if __name__ == "__main__":
411 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
412 network = Network(config)