3 # Electrum - lightweight Bitcoin client
4 # Copyright (C) 2014 Thomas Voegtlin
6 # This program is free software: you can redistribute it and/or modify
7 # it under the terms of the GNU General Public License as published by
8 # the Free Software Foundation, either version 3 of the License, or
9 # (at your option) any later version.
11 # This program is distributed in the hope that it will be useful,
12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 # GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License
17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
27 from network import Network
28 from util import print_msg, print_stderr
29 from simple_config import SimpleConfig
33 class NetworkProxy(threading.Thread):
35 # sends requests, runs callbacks
37 def __init__(self, config = {}):
38 threading.Thread.__init__(self)
40 self.config = SimpleConfig(config) if type(config) == type({}) else config
41 self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
42 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
43 self.daemon_port = config.get('daemon_port', DAEMON_PORT)
45 self.unanswered_requests = {}
46 self.subscriptions = {}
48 self.lock = threading.Lock()
49 self.pending_transactions_for_notifications = []
52 def start(self, start_daemon=False):
53 daemon_started = False
56 self.socket.connect(('', self.daemon_port))
57 threading.Thread.start(self)
64 elif not daemon_started:
65 print_stderr( "Starting daemon [%s]"%self.config.get('server'))
68 if (pid == 0): # The first child.
73 if (pid2 == 0): # Second child
74 server = NetworkServer(self.config)
77 except KeyboardInterrupt:
78 print "Ctrl C - Stopping server"
86 def parse_json(self, message):
87 s = message.find('\n')
90 j = json.loads( message[0:s] )
91 return j, message[s+1:]
95 # read responses and trigger callbacks
99 data = self.socket.recv(1024)
107 response, message = self.parse_json(message)
108 if response is not None:
109 self.process(response)
113 print "NetworkProxy: exiting"
116 def process(self, response):
118 if self.debug: print "<--", response
120 msg_id = response.get('id')
122 method, params, callback = self.unanswered_requests.pop(msg_id)
124 result = response.get('result')
125 callback(None, {'method':method, 'params':params, 'result':result, 'id':msg_id})
128 def subscribe(self, messages, callback):
129 # detect if it is a subscription
131 if self.subscriptions.get(callback) is None:
132 self.subscriptions[callback] = []
133 for message in messages:
134 if message not in self.subscriptions[callback]:
135 self.subscriptions[callback].append(message)
137 self.send( messages, callback )
140 def send(self, messages, callback):
141 """return the ids of the requests that we sent"""
146 request = json.dumps( { 'id':self.message_id, 'method':method, 'params':params } )
147 self.unanswered_requests[self.message_id] = method, params, callback
148 ids.append(self.message_id)
149 if self.debug: print "-->", request
151 out += request + '\n'
153 sent = self.socket.send( out )
158 def synchronous_get(self, requests, timeout=100000000):
159 queue = Queue.Queue()
160 ids = self.send(requests, lambda i,x: queue.put(x))
164 r = queue.get(True, timeout)
168 res[_id] = r.get('result')
175 def get_servers(self):
176 return self.synchronous_get([('network.get_servers',[])])[0]
178 def get_header(self, height):
179 return self.synchronous_get([('network.get_header',[height])])[0]
181 def get_local_height(self):
182 return self.synchronous_get([('network.get_local_height',[])])[0]
184 def is_connected(self):
185 return self.synchronous_get([('network.is_connected',[])])[0]
187 def is_up_to_date(self):
188 return self.synchronous_get([('network.is_up_to_date',[])])[0]
190 def main_server(self):
191 return self.synchronous_get([('network.main_server',[])])[0]
194 return self.synchronous_get([('daemon.shutdown',[])])[0]
197 def trigger_callback(self, cb):
205 class ClientThread(threading.Thread):
206 # read messages from client (socket), and sends them to Network
207 # responses are sent back on the same socket
209 def __init__(self, server, network, socket):
210 threading.Thread.__init__(self)
214 self.s.settimeout(0.1)
215 self.network = network
216 self.queue = Queue.Queue()
217 self.unanswered_requests = {}
224 self.send_responses()
226 data = self.s.recv(1024)
227 except socket.timeout:
235 cmd, message = self.parse_json(message)
240 #print "client thread terminating"
243 def parse_json(self, message):
244 n = message.find('\n')
247 j = json.loads( message[0:n] )
248 return j, message[n+1:]
251 def process(self, request):
252 if self.debug: print "<--", request
253 method = request['method']
254 params = request['params']
257 if method.startswith('network.'):
260 f = getattr(self.network, method[8:])
261 except AttributeError:
262 out['error'] = "unknown method"
264 out['result'] = f(*params)
265 except BaseException as e:
270 if method == 'daemon.shutdown':
271 self.server.running = False
272 self.queue.put({'id':_id, 'result':True})
278 my_id = self.unanswered_requests.pop(_id)
282 new_id = self.network.interface.send([(method, params)], cb) [0]
283 self.unanswered_requests[new_id] = _id
286 def send_responses(self):
289 r = self.queue.get_nowait()
292 out = json.dumps(r) + '\n'
296 if self.debug: print "-->", r
303 def __init__(self, config):
304 network = Network(config)
305 if not network.start(wait=True):
306 print_msg("Not connected, aborting.")
308 self.network = network
309 self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
310 self.server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
311 self.daemon_port = config.get('daemon_port', DAEMON_PORT)
312 self.server.bind(('', self.daemon_port))
313 self.server.listen(5)
314 self.server.settimeout(1)
316 self.timeout = config.get('daemon_timeout', 60)
324 connection, address = self.server.accept()
325 except socket.timeout:
326 if time.time() - t > self.timeout:
330 client = ClientThread(self, self.network, connection)
335 if __name__ == '__main__':
337 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.net:50002:s'})
338 server = NetworkServer(config)
341 except KeyboardInterrupt:
342 print "Ctrl C - Stopping server"