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
32 class NetworkProxy(threading.Thread):
34 # sends requests, runs callbacks
36 def __init__(self, config = {}):
37 threading.Thread.__init__(self)
39 self.config = SimpleConfig(config) if type(config) == type({}) else config
40 self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
41 self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
42 self.daemon_port = config.get('daemon_port', 8000)
44 self.unanswered_requests = {}
45 self.subscriptions = {}
47 self.lock = threading.Lock()
48 self.pending_transactions_for_notifications = []
51 def start(self, start_daemon=False):
52 daemon_started = False
55 self.socket.connect(('', self.daemon_port))
56 threading.Thread.start(self)
63 elif not daemon_started:
64 print_stderr( "Starting daemon [%s]"%self.config.get('server'))
67 if (pid == 0): # The first child.
72 if (pid2 == 0): # Second child
73 server = NetworkServer(self.config)
76 except KeyboardInterrupt:
77 print "Ctrl C - Stopping server"
85 def parse_json(self, message):
86 s = message.find('\n')
89 j = json.loads( message[0:s] )
90 return j, message[s+1:]
94 # read responses and trigger callbacks
98 data = self.socket.recv(1024)
106 response, message = self.parse_json(message)
107 if response is not None:
108 self.process(response)
112 print "NetworkProxy: exiting"
115 def process(self, response):
117 if self.debug: print "<--", response
119 msg_id = response.get('id')
121 method, params, callback = self.unanswered_requests.pop(msg_id)
123 result = response.get('result')
124 callback(None, {'method':method, 'params':params, 'result':result, 'id':msg_id})
127 def subscribe(self, messages, callback):
128 # detect if it is a subscription
130 if self.subscriptions.get(callback) is None:
131 self.subscriptions[callback] = []
132 for message in messages:
133 if message not in self.subscriptions[callback]:
134 self.subscriptions[callback].append(message)
136 self.send( messages, callback )
139 def send(self, messages, callback):
140 """return the ids of the requests that we sent"""
145 request = json.dumps( { 'id':self.message_id, 'method':method, 'params':params } )
146 self.unanswered_requests[self.message_id] = method, params, callback
147 ids.append(self.message_id)
148 if self.debug: print "-->", request
150 out += request + '\n'
152 sent = self.socket.send( out )
157 def synchronous_get(self, requests, timeout=100000000):
158 queue = Queue.Queue()
159 ids = self.send(requests, lambda i,x: queue.put(x))
163 r = queue.get(True, timeout)
167 res[_id] = r.get('result')
174 def get_servers(self):
175 return self.synchronous_get([('network.get_servers',[])])[0]
177 def get_header(self, height):
178 return self.synchronous_get([('network.get_header',[height])])[0]
180 def get_local_height(self):
181 return self.synchronous_get([('network.get_local_height',[])])[0]
183 def is_connected(self):
184 return self.synchronous_get([('network.is_connected',[])])[0]
186 def is_up_to_date(self):
187 return self.synchronous_get([('network.is_up_to_date',[])])[0]
189 def main_server(self):
190 return self.synchronous_get([('network.main_server',[])])[0]
193 return self.synchronous_get([('daemon.shutdown',[])])[0]
196 def trigger_callback(self, cb):
204 class ClientThread(threading.Thread):
205 # read messages from client (socket), and sends them to Network
206 # responses are sent back on the same socket
208 def __init__(self, server, network, socket):
209 threading.Thread.__init__(self)
213 self.s.settimeout(0.1)
214 self.network = network
215 self.queue = Queue.Queue()
216 self.unanswered_requests = {}
223 self.send_responses()
225 data = self.s.recv(1024)
226 except socket.timeout:
234 cmd, message = self.parse_json(message)
239 #print "client thread terminating"
242 def parse_json(self, message):
243 n = message.find('\n')
246 j = json.loads( message[0:n] )
247 return j, message[n+1:]
250 def process(self, request):
251 if self.debug: print "<--", request
252 method = request['method']
253 params = request['params']
256 if method.startswith('network.'):
259 f = getattr(self.network, method[8:])
260 except AttributeError:
261 out['error'] = "unknown method"
263 out['result'] = f(*params)
264 except BaseException as e:
269 if method == 'daemon.shutdown':
270 self.server.running = False
271 self.queue.put({'id':_id, 'result':True})
277 my_id = self.unanswered_requests.pop(_id)
281 new_id = self.network.interface.send([(method, params)], cb) [0]
282 self.unanswered_requests[new_id] = _id
285 def send_responses(self):
288 r = self.queue.get_nowait()
291 out = json.dumps(r) + '\n'
295 if self.debug: print "-->", r
302 def __init__(self, config):
303 network = Network(config)
304 if not network.start(wait=True):
305 print_msg("Not connected, aborting.")
307 self.network = network
308 self.server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
309 self.server.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
310 self.daemon_port = config.get('daemon_port', 8000)
311 self.server.bind(('', self.daemon_port))
312 self.server.listen(5)
313 self.server.settimeout(1)
315 self.timeout = config.get('daemon_timeout', 60)
323 connection, address = self.server.accept()
324 except socket.timeout:
325 if time.time() - t > self.timeout:
329 client = ClientThread(self, self.network, connection)
334 if __name__ == '__main__':
336 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.net:50002:s'})
337 server = NetworkServer(config)
340 except KeyboardInterrupt:
341 print "Ctrl C - Stopping server"