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')
65 dir_path = os.path.join( self.config.path, 'certs')
66 if not os.path.exists(dir_path):
69 # default subscriptions
70 self.subscriptions = {}
71 self.subscriptions[self.on_banner] = [('server.banner',[])]
72 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
75 def is_connected(self):
76 return self.interface and self.interface.is_connected
79 def send_subscriptions(self):
80 for cb, sub in self.subscriptions.items():
81 self.interface.send(sub, cb)
84 def subscribe(self, messages, callback):
86 if self.subscriptions.get(callback) is None:
87 self.subscriptions[callback] = []
88 for message in messages:
89 if message not in self.subscriptions[callback]:
90 self.subscriptions[callback].append(message)
92 if self.interface and self.interface.is_connected:
93 self.interface.send( messages, callback )
96 def register_callback(self, event, callback):
98 if not self.callbacks.get(event):
99 self.callbacks[event] = []
100 self.callbacks[event].append(callback)
103 def trigger_callback(self, event):
105 callbacks = self.callbacks.get(event,[])[:]
107 [callback() for callback in callbacks]
110 def random_server(self):
112 l = filter_protocol(self.get_servers(), self.protocol)
114 if s in self.disconnected_servers or s in self.interfaces.keys():
117 choice_list.append(s)
120 if not self.interfaces:
121 # we are probably offline, retry later
122 self.disconnected_servers = []
125 server = random.choice( choice_list )
129 def get_servers(self):
130 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
131 for s in self.recent_servers:
132 host, port, protocol = s.split(':')
134 out[host] = { protocol:port }
137 def start_interface(self, server):
138 if server in self.interfaces.keys():
140 i = interface.Interface({'server':server, 'path':self.config.path, 'proxy':self.proxy})
141 self.interfaces[server] = i
144 def start_random_interface(self):
145 server = self.random_server()
147 self.start_interface(server)
149 def start_interfaces(self):
150 if self.default_server:
151 self.start_interface(self.default_server)
152 self.interface = self.interfaces[self.default_server]
154 for i in range(NUM_SERVERS):
155 self.start_random_interface()
157 if not self.interface:
158 self.interface = self.interfaces.values()[0]
161 def start(self, wait=False):
162 self.start_interfaces()
163 threading.Thread.start(self)
165 self.interface.connect_event.wait()
166 return self.interface.is_connected
169 def set_proxy(self, proxy):
173 def set_server(self, server):
174 if self.default_server == server:
177 # stop the interface in order to terminate subscriptions
178 self.interface.stop()
180 self.trigger_callback('disconnecting')
182 self.default_server = server
184 if server in self.interfaces.keys():
185 self.interface = self.interfaces[server]
186 self.send_subscriptions()
188 self.start_interface(server)
189 self.interface = self.interfaces[server]
192 def add_recent_server(self, i):
195 if s in self.recent_servers:
196 self.recent_servers.remove(s)
197 self.recent_servers.insert(0,s)
198 self.recent_servers = self.recent_servers[0:20]
199 self.config.set_key('recent_servers', self.recent_servers)
204 self.blockchain.start()
209 while self.is_running():
211 i = self.queue.get(timeout = 30)
213 if len(self.interfaces) < NUM_SERVERS:
214 self.start_random_interface()
218 self.add_recent_server(i)
219 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
220 if i == self.interface:
221 print_error('sending subscriptions to', self.interface.server)
222 self.send_subscriptions()
223 self.trigger_callback('connected')
225 self.disconnected_servers.append(i.server)
226 self.interfaces.pop(i.server)
227 if i == self.interface:
228 self.interface = None
229 self.trigger_callback('disconnected')
231 if self.interface is None and self.config.get('auto_cycle') and self.interfaces:
232 self.interface = random.choice(self.interfaces.values())
233 self.config.set_key('server', self.interface.server, False)
234 print_error("resending subscriptions after disconnect")
235 self.send_subscriptions()
236 self.trigger_callback('connected')
239 def on_header(self, i, r):
240 result = r.get('result')
241 if not result: return
242 self.heights[i.server] = result.get('block_height')
243 self.blockchain.queue.put((i,result))
245 def on_peers(self, i, r):
247 self.irc_servers = self.parse_servers(r.get('result'))
248 self.trigger_callback('peers')
250 def on_banner(self, i, r):
251 self.banner = r.get('result')
252 self.trigger_callback('banner')
255 with self.lock: self.running = False
257 def is_running(self):
258 with self.lock: return self.running
261 def synchronous_get(self, requests, timeout=100000000):
262 queue = Queue.Queue()
263 ids = self.interface.send(requests, lambda i,r: queue.put(r))
267 r = queue.get(True, timeout)
271 res[_id] = r.get('result')
278 def retrieve_transaction(self, tx_hash, tx_height=0):
280 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
282 return transaction.Transaction(r)
285 def parse_servers(self, result):
286 """ parse servers list into dict format"""
287 from version import PROTOCOL_VERSION
296 if re.match("[stgh]\d*", v):
297 protocol, port = v[0], v[1:]
298 if port == '': port = DEFAULT_PORTS[protocol]
300 elif re.match("v(.?)+", v):
302 elif re.match("p\d*", v):
303 pruning_level = v[1:]
304 if pruning_level == '': pruning_level = '0'
306 is_recent = float(version)>=float(PROTOCOL_VERSION)
310 if out and is_recent:
311 out['pruning'] = pruning_level
319 if __name__ == "__main__":
321 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
322 network = Network(config)