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 'ecdsa.org': DEFAULT_PORTS,
11 'ecdsa.net': DEFAULT_PORTS,
12 'electrum.hachre.de': DEFAULT_PORTS,
13 'electrum.novit.ro': DEFAULT_PORTS,
14 'electrum.coinwallet.me': DEFAULT_PORTS,
15 'cube.l0g.in': DEFAULT_PORTS,
16 'bitcoin.epicinet.net': DEFAULT_PORTS,
17 'h.1209k.com': DEFAULT_PORTS,
18 'electrum.electricnewyear.net': DEFAULT_PORTS,
19 'erbium.sytes.net': DEFAULT_PORTS,
20 'e2.pdmc.net':DEFAULT_PORTS,
21 'electrum.thwg.org':DEFAULT_PORTS,
25 def parse_servers(result):
26 """ parse servers list into dict format"""
27 from version import PROTOCOL_VERSION
36 if re.match("[stgh]\d*", v):
37 protocol, port = v[0], v[1:]
38 if port == '': port = DEFAULT_PORTS[protocol]
40 elif re.match("v(.?)+", v):
42 elif re.match("p\d*", v):
44 if pruning_level == '': pruning_level = '0'
46 is_recent = float(version)>=float(PROTOCOL_VERSION)
51 out['pruning'] = pruning_level
58 def filter_protocol(servers, p):
60 for k, protocols in servers.items():
62 l.append( ':'.join([k, protocols[p], p]) )
66 def pick_random_server(p='s'):
67 return random.choice( filter_protocol(DEFAULT_SERVERS,p) )
69 from simple_config import SimpleConfig
71 class Network(threading.Thread):
73 def __init__(self, config = {}):
74 threading.Thread.__init__(self)
76 self.config = SimpleConfig(config) if type(config) == type({}) else config
77 self.lock = threading.Lock()
78 self.num_server = 8 if not self.config.get('oneserver') else 0
79 self.blockchain = Blockchain(self.config, self)
81 self.queue = Queue.Queue()
83 self.protocol = self.config.get('protocol','s')
86 # Server for addresses and transactions
87 self.default_server = self.config.get('server')
88 if not self.default_server:
89 self.default_server = pick_random_server(self.protocol)
91 self.irc_servers = [] # returned by interface (list from irc)
92 self.pending_servers = set([])
93 self.disconnected_servers = set([])
94 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
98 self.proxy = self.config.get('proxy')
100 self.merkle_roots = {}
104 dir_path = os.path.join( self.config.path, 'certs')
105 if not os.path.exists(dir_path):
108 # default subscriptions
109 self.subscriptions = {}
110 self.subscriptions[self.on_banner] = [('server.banner',[])]
111 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
114 def is_connected(self):
115 return self.interface and self.interface.is_connected
118 def is_up_to_date(self):
119 return self.interface.is_up_to_date()
122 def main_server(self):
123 return self.interface.server
126 def send_subscriptions(self):
127 for cb, sub in self.subscriptions.items():
128 self.interface.send(sub, cb)
131 def subscribe(self, messages, callback):
133 if self.subscriptions.get(callback) is None:
134 self.subscriptions[callback] = []
135 for message in messages:
136 if message not in self.subscriptions[callback]:
137 self.subscriptions[callback].append(message)
139 if self.is_connected():
140 self.interface.send( messages, callback )
143 def send(self, messages, callback):
144 if self.is_connected():
145 self.interface.send( messages, callback )
151 def register_callback(self, event, callback):
153 if not self.callbacks.get(event):
154 self.callbacks[event] = []
155 self.callbacks[event].append(callback)
158 def trigger_callback(self, event):
160 callbacks = self.callbacks.get(event,[])[:]
162 [callback() for callback in callbacks]
165 def random_server(self):
167 l = filter_protocol(self.get_servers(), self.protocol)
169 if s in self.pending_servers or s in self.disconnected_servers or s in self.interfaces.keys():
172 choice_list.append(s)
175 if not self.interfaces:
176 # we are probably offline, retry later
177 self.disconnected_servers = set([])
180 server = random.choice( choice_list )
184 def get_servers(self):
186 out = self.irc_servers
188 out = DEFAULT_SERVERS
189 for s in self.recent_servers:
190 host, port, protocol = s.split(':')
192 out[host] = { protocol:port }
195 def start_interface(self, server):
196 if server in self.interfaces.keys():
198 i = interface.Interface(server, self.config)
199 self.pending_servers.add(server)
203 def start_random_interface(self):
204 server = self.random_server()
206 self.start_interface(server)
208 def start_interfaces(self):
209 self.interface = self.start_interface(self.default_server)
211 for i in range(self.num_server):
212 self.start_random_interface()
215 def start(self, wait=False):
216 self.start_interfaces()
217 threading.Thread.start(self)
219 return self.wait_until_connected()
221 def wait_until_connected(self):
222 "wait until connection status is known"
223 if self.config.get('auto_cycle'):
224 # self.random_server() returns None if all servers have been tried
225 while not self.is_connected() and self.random_server():
228 self.interface.connect_event.wait()
230 return self.interface.is_connected
233 def set_parameters(self, host, port, protocol, proxy, auto_connect):
235 self.config.set_key('auto_cycle', auto_connect, True)
236 self.config.set_key("proxy", proxy, True)
237 self.config.set_key("protocol", protocol, True)
238 server = ':'.join([ host, port, protocol ])
239 self.config.set_key("server", server, True)
241 if self.proxy != proxy or self.protocol != protocol:
243 self.protocol = protocol
244 for i in self.interfaces.values(): i.stop()
246 #self.interface = None
250 if not self.interface.is_connected:
251 self.switch_to_random_interface()
253 if self.server_lag > 0:
254 self.stop_interface()
256 self.set_server(server)
259 def switch_to_random_interface(self):
261 self.switch_to_interface(random.choice(self.interfaces.values()))
263 def switch_to_interface(self, interface):
264 assert not self.interface.is_connected
265 server = interface.server
266 print_error("switching to", server)
267 self.interface = interface
268 h = self.heights.get(server)
270 self.server_lag = self.blockchain.height() - h
271 self.config.set_key('server', server, False)
272 self.default_server = server
273 self.send_subscriptions()
274 self.trigger_callback('connected')
277 def stop_interface(self):
278 self.interface.stop()
281 def set_server(self, server):
282 if self.default_server == server and self.interface.is_connected:
285 if self.protocol != server.split(':')[2]:
288 # stop the interface in order to terminate subscriptions
289 if self.interface.is_connected:
290 self.stop_interface()
293 self.trigger_callback('disconnecting')
295 self.default_server = server
296 self.config.set_key("server", server, True)
298 if server in self.interfaces.keys():
299 self.switch_to_interface( self.interfaces[server] )
301 self.interface = self.start_interface(server)
304 def add_recent_server(self, i):
307 if s in self.recent_servers:
308 self.recent_servers.remove(s)
309 self.recent_servers.insert(0,s)
310 self.recent_servers = self.recent_servers[0:20]
311 self.config.set_key('recent_servers', self.recent_servers)
314 def new_blockchain_height(self, blockchain_height, i):
315 if self.is_connected():
316 h = self.heights.get(self.interface.server)
318 self.server_lag = blockchain_height - h
319 if self.server_lag > 1:
320 print_error( "Server is lagging", blockchain_height, h)
321 if self.config.get('auto_cycle'):
322 self.set_server(i.server)
324 print_error('no height for main interface')
326 self.trigger_callback('updated')
330 self.blockchain.start()
335 while self.is_running():
337 i = self.queue.get(timeout = 30 if self.interfaces else 3)
339 if len(self.interfaces) < self.num_server:
340 self.start_random_interface()
343 if i.server in self.pending_servers:
344 self.pending_servers.remove(i.server)
347 #if i.server in self.interfaces: raise
348 self.interfaces[i.server] = i
349 self.add_recent_server(i)
350 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
351 if i == self.interface:
352 print_error('sending subscriptions to', self.interface.server)
353 self.send_subscriptions()
354 self.trigger_callback('connected')
356 self.disconnected_servers.add(i.server)
357 if i.server in self.interfaces:
358 self.interfaces.pop(i.server)
359 if i.server in self.heights:
360 self.heights.pop(i.server)
361 if i == self.interface:
362 #self.interface = None
363 self.trigger_callback('disconnected')
365 if not self.interface.is_connected and self.config.get('auto_cycle'):
366 self.switch_to_random_interface()
369 def on_header(self, i, r):
370 result = r.get('result')
371 if not result: return
372 height = result.get('block_height')
373 self.heights[i.server] = height
374 self.merkle_roots[i.server] = result.get('merkle_root')
375 self.utxo_roots[i.server] = result.get('utxo_root')
376 # notify blockchain about the new height
377 self.blockchain.queue.put((i,result))
379 if i == self.interface:
380 self.server_lag = self.blockchain.height() - height
381 if self.server_lag > 1 and self.config.get('auto_cycle'):
382 print_error( "Server lagging, stopping interface")
383 self.stop_interface()
385 self.trigger_callback('updated')
388 def on_peers(self, i, r):
390 self.irc_servers = parse_servers(r.get('result'))
391 self.trigger_callback('peers')
393 def on_banner(self, i, r):
394 self.banner = r.get('result')
395 self.trigger_callback('banner')
398 with self.lock: self.running = False
400 def is_running(self):
401 with self.lock: return self.running
404 def synchronous_get(self, requests, timeout=100000000):
405 return self.interface.synchronous_get(requests)
408 def get_header(self, tx_height):
409 return self.blockchain.read_header(tx_height)
411 def get_local_height(self):
412 return self.blockchain.height()
416 #def retrieve_transaction(self, tx_hash, tx_height=0):
418 # r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
420 # return transaction.Transaction(r)
426 if __name__ == "__main__":
427 network = NetworkProxy({})
429 print network.get_servers()
432 network.send([('blockchain.headers.subscribe',[])], q.put)
434 r = q.get(timeout=10000)