lib/network.py

   1 import interface
   2 from blockchain import Blockchain
   3 import threading, time, Queue, os, sys, shutil
   4 from util import user_dir, appdata_dir, print_error
   5 from bitcoin import *
   6
   7
   8 class Network(threading.Thread):
   9
  10     def __init__(self, config):
  11         threading.Thread.__init__(self)
  12         self.daemon = True
  13         self.config = config
  14         self.lock = threading.Lock()
  15         self.blockchain = Blockchain(config)
  16         self.interfaces = {}
  17         self.queue = Queue.Queue()
  18         self.default_server = self.config.get('server')
  19         self.servers_list = interface.filter_protocol(interface.DEFAULT_SERVERS,'s')
  20         self.callbacks = {}
  21
  22
  23     def register_callback(self, event, callback):
  24         with self.lock:
  25             if not self.callbacks.get(event):
  26                 self.callbacks[event] = []
  27             self.callbacks[event].append(callback)
  28
  29
  30     def trigger_callback(self, event):
  31         with self.lock:
  32             callbacks = self.callbacks.get(event,[])[:]
  33         if callbacks:
  34             [callback() for callback in callbacks]
  35
  36
  37     def start_interfaces(self):
  38
  39         for server in self.servers_list:
  40             self.interfaces[server] = interface.Interface({'server':server})
  41
  42         for i in self.interfaces.values():
  43             i.network = self # fixme
  44             i.start(self.queue)
  45
  46         if self.default_server:
  47             self.interface = interface.Interface({'server':self.default_server})
  48             self.interface.network = self # fixme
  49             self.interface.start(self.queue)
  50         else:
  51             self.interface = self.interfaces[0]
  52
  53
  54     def start(self, wait=False):
  55
  56         self.start_interfaces()
  57         threading.Thread.__init__(self)
  58         if wait:
  59             self.interface.connect_event.wait()
  60             return self.interface.is_connected
  61
  62
  63
  64     def run(self):
  65         self.blockchain.start()
  66
  67         with self.lock:
  68             self.running = True
  69
  70         while self.is_running():
  71             i = self.queue.get()
  72
  73             if i.is_connected:
  74                 i.register_channel('verifier', self.blockchain.queue)
  75                 i.register_channel('get_header')
  76                 i.send([ ('blockchain.headers.subscribe',[])], 'verifier')
  77                 if i == self.interface:
  78                     i.send([('server.banner',[])])
  79                     i.send([('server.peers.subscribe',[])])
  80             else:
  81                 self.interfaces.pop(i.server)
  82                 if i == self.interface:
  83                     if self.default_server is None:
  84                         print_msg("Using random server...")
  85                         server = random.choice( self.servers_list )
  86                         self.interface = interface.Interface({'server':self.default_server})
  87                     else:
  88                         #i.trigger_callback('disconnected')
  89                         pass
  90
  91     def on_peers(self, resut):
  92         pass
  93
  94     def on_banner(self, result):
  95         pass
  96
  97     def stop(self):
  98         with self.lock: self.running = False
  99
 100     def is_running(self):
 101         with self.lock: return self.running
 102
 103
 104     def resend_subscriptions(self):
 105         for channel, messages in self.subscriptions.items():
 106             if messages:
 107                 self.send(messages, channel)
 108
 109
 110     def auto_cycle(self):
 111         if not self.is_connected and self.config.get('auto_cycle'):
 112             print_msg("Using random server...")
 113             servers = filter_protocol(DEFAULT_SERVERS, 's')
 114             while servers:
 115                 server = random.choice( servers )
 116                 servers.remove(server)
 117                 print server
 118                 self.config.set_key('server', server, False)
 119                 self.init_with_server(self.config)
 120                 if self.is_connected: break
 121
 122             if not self.is_connected:
 123                 print 'no server available'
 124                 self.connect_event.set() # to finish start
 125                 self.server = 'ecdsa.org:50001:t'
 126                 self.proxy = None
 127                 return
 128
 129
 130
 131
 132 if __name__ == "__main__":
 133     import simple_config
 134     config = simple_config.SimpleConfig({'verbose':True})
 135     network = Network(config)
 136     network.start()
 137
 138     while 1:
 139         time.sleep(1)
 140
 141
 142