3 # Electrum - lightweight Bitcoin client
4 # Copyright (C) 2011 thomasv@gitorious
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/>.
20 import random, socket, ast, re
21 import threading, traceback, sys, time, json, Queue
23 from version import ELECTRUM_VERSION
24 from util import print_error
29 'electrum.novit.ro:50001:t',
30 'electrum.pdmc.net:50001:t',
32 'electrum.bitcoins.sk:50001:t',
33 'uncle-enzo.info:50001:t',
34 'electrum.bytesized-hosting.com:50001:t',
35 'electrum.bitcoin.cz:50001:t',
36 'electrum.bitfoo.org:50001:t'
39 proxy_modes = ['socks4', 'socks5', 'http']
42 def pick_random_server():
43 return random.choice( DEFAULT_SERVERS )
48 class Interface(threading.Thread):
50 def register_callback(self, event, callback):
52 if not self.callbacks.get(event):
53 self.callbacks[event] = []
54 self.callbacks[event].append(callback)
56 def trigger_callback(self, event):
58 callbacks = self.callbacks.get(event,[])[:]
60 [callback() for callback in callbacks]
62 def init_server(self, host, port, proxy=None, use_ssl=True):
66 self.use_ssl = use_ssl
67 self.poll_interval = 1
71 self.unanswered_requests = {}
75 def queue_json_response(self, c):
81 error = c.get('error')
84 print "received error:", c
87 if msg_id is not None:
89 method, params, channel = self.unanswered_requests.pop(msg_id)
90 result = c.get('result')
92 # notification: find the channel(s)
93 method = c.get('method')
94 params = c.get('params')
96 if method == 'blockchain.numblocks.subscribe':
100 elif method == 'blockchain.headers.subscribe':
104 elif method == 'blockchain.address.subscribe':
110 for k,v in self.subscriptions.items():
111 if (method, params) in v:
115 print "received unexpected notification", method, params
116 print self.subscriptions
119 response_queue = self.responses[channel]
120 response_queue.put({'method':method, 'params':params, 'result':result, 'id':msg_id})
124 def get_response(self, channel='default', block=True, timeout=10000000000):
125 return self.responses[channel].get(block, timeout)
127 def register_channel(self, channel):
129 self.responses[channel] = Queue.Queue()
131 def poke(self, channel):
132 self.responses[channel].put(None)
135 def init_http(self, host, port, proxy=None, use_ssl=True):
136 self.init_server(host, port, proxy, use_ssl)
137 self.session_id = None
138 self.connection_msg = ('https' if self.use_ssl else 'http') + '://%s:%d'%( self.host, self.port )
139 self.is_connected = True
142 self.is_connected = True
143 while self.is_connected:
147 time.sleep(self.poll_interval)
148 except socket.gaierror:
153 traceback.print_exc(file=sys.stdout)
156 self.is_connected = False
163 def send_http(self, messages, channel='default'):
164 import urllib2, json, time, cookielib
168 socks.setdefaultproxy(proxy_modes.index(self.proxy["mode"]), self.proxy["host"], int(self.proxy["port"]) )
169 socks.wrapmodule(urllib2)
171 cj = cookielib.CookieJar()
172 opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
173 urllib2.install_opener(opener)
180 if type(params) != type([]): params = [params]
181 data.append( { 'method':method, 'id':self.message_id, 'params':params } )
182 self.unanswered_requests[self.message_id] = method, params, channel
186 data_json = json.dumps(data)
192 headers = {'content-type': 'application/json'}
194 headers['cookie'] = 'SESSION=%s'%self.session_id
196 req = urllib2.Request(self.connection_msg, data_json, headers)
197 response_stream = urllib2.urlopen(req)
199 for index, cookie in enumerate(cj):
200 if cookie.name=='SESSION':
201 self.session_id = cookie.value
203 response = response_stream.read()
204 self.bytes_received += len(response)
206 response = json.loads( response )
207 if type(response) is not type([]):
208 self.queue_json_response(response)
210 for item in response:
211 self.queue_json_response(item)
214 self.poll_interval = 1
216 if self.poll_interval < 15:
217 self.poll_interval += 1
218 #print self.poll_interval, response
220 self.rtime = time.time() - t1
221 self.is_connected = True
226 def init_tcp(self, host, port, proxy=None, use_ssl=True):
227 self.init_server(host, port, proxy, use_ssl)
231 self.connection_msg = "%s:%d"%(self.host,self.port)
232 if self.proxy is None:
233 s = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
235 self.connection_msg += " using proxy %s:%s:%s"%(self.proxy.get('mode'), self.proxy.get('host'), self.proxy.get('port'))
237 s = socks.socksocket()
238 s.setproxy(proxy_modes.index(self.proxy["mode"]), self.proxy["host"], int(self.proxy["port"]) )
241 s = ssl.wrap_socket(s, ssl_version=ssl.PROTOCOL_SSLv23)
244 s.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
247 s.connect(( self.host.encode('ascii'), int(self.port)))
250 self.is_connected = True
252 self.is_connected = False
259 while self.is_connected:
260 try: msg = self.s.recv(1024)
261 except socket.timeout:
263 # ping the server with server.version, as a real ping does not exist yet
264 self.send([('server.version', [ELECTRUM_VERSION])])
267 self.bytes_received += len(msg)
269 self.is_connected = False
277 self.queue_json_response(c)
280 traceback.print_exc(file=sys.stdout)
282 self.is_connected = False
285 def send_tcp(self, messages, channel='default'):
286 """return the ids of the requests that we sent"""
291 request = json.dumps( { 'id':self.message_id, 'method':method, 'params':params } )
292 self.unanswered_requests[self.message_id] = method, params, channel
293 ids.append(self.message_id)
295 # print "-->",request
297 out += request + '\n'
300 sent = self.s.send( out )
303 # this happens when we get disconnected
304 print "Not connected, cannot send"
310 def __init__(self, config=None, loop=False):
313 from simple_config import SimpleConfig
314 config = SimpleConfig()
316 threading.Thread.__init__(self)
320 self.connect_event = threading.Event()
322 self.subscriptions = {}
324 self.responses['default'] = Queue.Queue()
327 self.lock = threading.Lock()
329 self.servers = [] # actual list from IRC
331 self.bytes_received = 0
335 def init_interface(self):
336 if self.config.get('server'):
337 self.init_with_server(self.config)
339 print "Using random server..."
340 servers = DEFAULT_SERVERS[:]
342 server = random.choice( servers )
343 servers.remove(server)
344 self.config.set_key('server', server, False)
345 self.init_with_server(self.config)
346 if self.is_connected: break
349 print 'no server available'
350 self.is_connected = False
351 self.connect_event.set() # to finish start
352 self.server = 'ecdsa.org:50001:t'
356 self.connect_event.set()
357 if self.is_connected:
358 self.send([('server.version', [ELECTRUM_VERSION])])
359 self.trigger_callback('connected')
361 self.trigger_callback('notconnected')
362 #print_error("Failed to connect " + self.connection_msg)
365 def init_with_server(self, config):
367 s = config.get('server')
368 host, port, protocol = s.split(':')
371 self.protocol = protocol
372 proxy = self.parse_proxy_options(config.get('proxy'))
373 self.server = host + ':%d:%s'%(port, protocol)
375 #print protocol, host, port
377 self.init_tcp(host, port, proxy, use_ssl=(protocol=='s'))
378 elif protocol in 'gh':
379 self.init_http(host, port, proxy, use_ssl=(protocol=='g'))
381 raise BaseException('Unknown protocol: %s'%protocol)
384 def send(self, messages, channel='default'):
387 for message in messages:
389 if m[-10:] == '.subscribe':
394 if self.subscriptions.get(channel) is None:
395 self.subscriptions[channel] = []
396 self.subscriptions[channel] += sub
398 if self.protocol in 'st':
400 out = self.send_tcp(messages, channel)
402 # do not use lock, http is synchronous
403 out = self.send_http(messages, channel)
407 def resend_subscriptions(self):
408 for channel, messages in self.subscriptions.items():
410 self.send(messages, channel)
414 def parse_proxy_options(self, s):
415 if type(s) == type({}): return s # fixme: type should be fixed
416 if type(s) != type(""): return None
417 if s.lower() == 'none': return None
418 proxy = { "mode":"socks5", "host":"localhost" }
421 if proxy_modes.count(args[n]) == 1:
422 proxy["mode"] = args[n]
425 proxy["host"] = args[n]
428 proxy["port"] = args[n]
430 proxy["port"] = "8080" if proxy["mode"] == "http" else "1080"
434 def set_server(self, server, proxy=None):
435 # raise an error if the format isnt correct
436 a,b,c = server.split(':')
440 if server != self.server or proxy != self.proxy:
441 print "changing server:", server, proxy
444 if self.protocol in 'st':
445 self.s.shutdown(socket.SHUT_RDWR)
447 self.is_connected = False # this exits the polling loop
448 self.trigger_callback('disconnecting') # for actively disconnecting
450 def is_empty(self, channel):
451 q = self.responses.get(channel)
458 def get_pending_requests(self, channel):
461 for k, v in self.unanswered_requests.items():
463 if c == channel: result.append(k)
466 def is_up_to_date(self, channel):
467 return self.is_empty(channel) and not self.get_pending_requests(channel)
470 def synchronous_get(self, requests, timeout=100000000):
471 # todo: use generators, unanswered_requests should be a list of arrays...
472 ids = self.send(requests)
476 r = self.responses['default'].get(True, timeout)
480 res[_id] = r.get('result')
488 threading.Thread.start(self)
489 # wait until connection is established
490 self.connect_event.wait()
494 self.init_interface()
495 if self.is_connected:
496 self.resend_subscriptions()
497 self.run_tcp() if self.protocol in 'st' else self.run_http()
499 self.trigger_callback('disconnected')
501 if not self.loop: break