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')
53 self.disconnected_servers = []
58 self.proxy = self.config.get('proxy')
61 dir_path = os.path.join( self.config.path, 'certs')
62 if not os.path.exists(dir_path):
65 # default subscriptions
66 self.subscriptions = {}
67 self.subscriptions[self.on_banner] = [('server.banner',[])]
68 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
71 def is_connected(self):
72 return self.interface and self.interface.is_connected
75 def send_subscriptions(self):
76 for cb, sub in self.subscriptions.items():
77 self.interface.send(sub, cb)
80 def subscribe(self, messages, callback):
82 if self.subscriptions.get(callback) is None:
83 self.subscriptions[callback] = []
84 for message in messages:
85 if message not in self.subscriptions[callback]:
86 self.subscriptions[callback].append(message)
88 if self.interface and self.interface.is_connected:
89 self.interface.send( messages, callback )
92 def register_callback(self, event, callback):
94 if not self.callbacks.get(event):
95 self.callbacks[event] = []
96 self.callbacks[event].append(callback)
99 def trigger_callback(self, event):
101 callbacks = self.callbacks.get(event,[])[:]
103 [callback() for callback in callbacks]
106 def random_server(self):
108 l = filter_protocol(self.get_servers(), 's')
110 if s in self.disconnected_servers or s in self.interfaces.keys():
113 choice_list.append(s)
116 if not self.interfaces:
117 # we are probably offline, retry later
118 self.disconnected_servers = []
121 server = random.choice( choice_list )
125 def get_servers(self):
127 return DEFAULT_SERVERS
132 def start_interface(self, server):
133 if server in self.interfaces.keys():
135 i = interface.Interface({'server':server, 'path':self.config.path, 'proxy':self.proxy})
136 self.interfaces[server] = i
139 def start_random_interface(self):
140 server = self.random_server()
142 self.start_interface(server)
144 def start_interfaces(self):
145 if self.default_server:
146 self.start_interface(self.default_server)
147 self.interface = self.interfaces[self.default_server]
149 for i in range(NUM_SERVERS):
150 self.start_random_interface()
152 if not self.interface:
153 self.interface = self.interfaces.values()[0]
156 def start(self, wait=False):
157 self.start_interfaces()
158 threading.Thread.start(self)
160 self.interface.connect_event.wait()
161 return self.interface.is_connected
164 def set_proxy(self, proxy):
168 def set_server(self, server):
169 if self.default_server == server:
172 # stop the interface in order to terminate subscriptions
173 self.interface.stop()
175 self.trigger_callback('disconnecting')
177 self.default_server = server
179 if server in self.interfaces.keys():
180 self.interface = self.interfaces[server]
181 self.send_subscriptions()
183 self.start_interface(server)
184 self.interface = self.interfaces[server]
191 self.blockchain.start()
196 while self.is_running():
198 i = self.queue.get(timeout = 30)
200 if len(self.interfaces) < NUM_SERVERS:
201 self.start_random_interface()
205 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
206 if i == self.interface:
207 print_error('sending subscriptions to', self.interface.server)
208 self.send_subscriptions()
209 self.trigger_callback('connected')
211 self.disconnected_servers.append(i.server)
212 self.interfaces.pop(i.server)
213 if i == self.interface:
214 self.interface = None
215 self.trigger_callback('disconnected')
217 if self.interface is None and self.config.get('auto_cycle') and self.interfaces:
218 self.interface = random.choice(self.interfaces.values())
219 self.config.set_key('server', self.interface.server, False)
220 print_error("resending subscriptions after disconnect")
221 self.send_subscriptions()
222 self.trigger_callback('connected')
225 def on_header(self, i, r):
226 result = r.get('result')
227 if not result: return
228 self.heights[i.server] = result.get('block_height')
229 self.blockchain.queue.put((i,result))
231 def on_peers(self, i, r):
233 self.servers = self.parse_servers(r.get('result'))
234 self.trigger_callback('peers')
236 def on_banner(self, i, r):
237 self.banner = r.get('result')
238 self.trigger_callback('banner')
241 with self.lock: self.running = False
243 def is_running(self):
244 with self.lock: return self.running
247 def synchronous_get(self, requests, timeout=100000000):
248 queue = Queue.Queue()
249 ids = self.interface.send(requests, lambda i,r: queue.put(r))
253 r = queue.get(True, timeout)
257 res[_id] = r.get('result')
264 def retrieve_transaction(self, tx_hash, tx_height=0):
266 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
268 return transaction.Transaction(r)
271 def parse_servers(self, result):
272 """ parse servers list into dict format"""
273 from version import PROTOCOL_VERSION
282 if re.match("[stgh]\d*", v):
283 protocol, port = v[0], v[1:]
284 if port == '': port = DEFAULT_PORTS[protocol]
286 elif re.match("v(.?)+", v):
288 elif re.match("p\d*", v):
289 pruning_level = v[1:]
290 if pruning_level == '': pruning_level = '0'
292 is_recent = float(version)>=float(PROTOCOL_VERSION)
296 if out and is_recent:
297 out['pruning'] = pruning_level
305 if __name__ == "__main__":
307 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
308 network = Network(config)