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, ssl
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):
78 # print_error( "<--",c )
81 error = c.get('error')
84 print_error("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 if method == 'server.version':
93 self.server_version = result
95 elif method == 'server.peers.subscribe':
104 if re.match("[stgh]\d+", v):
105 ports.append((v[0], v[1:]))
106 if re.match("v(.?)+", v):
109 is_recent = float(version)>=0.5
112 if ports and is_recent:
113 servers.append((host, ports))
114 self.servers = servers
115 self.trigger_callback('peers')
118 # notification: find the channel(s)
119 method = c.get('method')
120 params = c.get('params')
122 if method == 'blockchain.numblocks.subscribe':
126 elif method == 'blockchain.headers.subscribe':
130 elif method == 'blockchain.address.subscribe':
136 for k,v in self.subscriptions.items():
137 if (method, params) in v:
141 print_error( "received unexpected notification", method, params)
142 print_error( self.subscriptions )
145 response_queue = self.responses[channel]
146 response_queue.put({'method':method, 'params':params, 'result':result, 'id':msg_id})
150 def get_response(self, channel='default', block=True, timeout=10000000000):
151 return self.responses[channel].get(block, timeout)
153 def register_channel(self, channel):
155 self.responses[channel] = Queue.Queue()
157 def poke(self, channel):
158 self.responses[channel].put(None)
161 def init_http(self, host, port, proxy=None, use_ssl=True):
162 self.init_server(host, port, proxy, use_ssl)
163 self.session_id = None
164 self.connection_msg = ('https' if self.use_ssl else 'http') + '://%s:%d'%( self.host, self.port )
165 self.is_connected = True
168 self.is_connected = True
169 while self.is_connected:
173 time.sleep(self.poll_interval)
174 except socket.gaierror:
179 traceback.print_exc(file=sys.stdout)
182 self.is_connected = False
189 def send_http(self, messages, channel='default'):
190 import urllib2, json, time, cookielib
194 socks.setdefaultproxy(proxy_modes.index(self.proxy["mode"]) + 1, self.proxy["host"], int(self.proxy["port"]) )
195 socks.wrapmodule(urllib2)
197 cj = cookielib.CookieJar()
198 opener = urllib2.build_opener(urllib2.HTTPCookieProcessor(cj))
199 urllib2.install_opener(opener)
206 if type(params) != type([]): params = [params]
207 data.append( { 'method':method, 'id':self.message_id, 'params':params } )
208 self.unanswered_requests[self.message_id] = method, params, channel
212 data_json = json.dumps(data)
218 headers = {'content-type': 'application/json'}
220 headers['cookie'] = 'SESSION=%s'%self.session_id
222 req = urllib2.Request(self.connection_msg, data_json, headers)
223 response_stream = urllib2.urlopen(req)
225 for index, cookie in enumerate(cj):
226 if cookie.name=='SESSION':
227 self.session_id = cookie.value
229 response = response_stream.read()
230 self.bytes_received += len(response)
232 response = json.loads( response )
233 if type(response) is not type([]):
234 self.queue_json_response(response)
236 for item in response:
237 self.queue_json_response(item)
240 self.poll_interval = 1
242 if self.poll_interval < 15:
243 self.poll_interval += 1
244 #print self.poll_interval, response
246 self.rtime = time.time() - t1
247 self.is_connected = True
252 def init_tcp(self, host, port, proxy=None, use_ssl=True):
253 self.init_server(host, port, proxy, use_ssl)
256 self.connection_msg = "%s:%d"%(self.host,self.port)
257 if self.proxy is None:
258 s = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
260 self.connection_msg += " using proxy %s:%s:%s"%(self.proxy.get('mode'), self.proxy.get('host'), self.proxy.get('port'))
262 s = socks.socksocket()
263 s.setproxy(proxy_modes.index(self.proxy["mode"]) + 1, self.proxy["host"], int(self.proxy["port"]) )
266 s = ssl.wrap_socket(s, ssl_version=ssl.PROTOCOL_SSLv23)
269 s.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
272 s.connect(( self.host.encode('ascii'), int(self.port)))
275 self.is_connected = True
277 self.is_connected = False
284 while self.is_connected:
288 msg = self.s.recv(1024)
289 except socket.timeout:
295 # ping the server with server.version, as a real ping does not exist yet
296 self.send([('server.version', [ELECTRUM_VERSION])])
300 self.bytes_received += len(msg)
302 self.is_connected = False
310 self.queue_json_response(c)
313 traceback.print_exc(file=sys.stdout)
315 self.is_connected = False
318 def send_tcp(self, messages, channel='default'):
319 """return the ids of the requests that we sent"""
324 request = json.dumps( { 'id':self.message_id, 'method':method, 'params':params } )
325 self.unanswered_requests[self.message_id] = method, params, channel
326 ids.append(self.message_id)
328 # print "-->",request
330 out += request + '\n'
333 sent = self.s.send( out )
336 # this happens when we get disconnected
337 print_error( "Not connected, cannot send" )
343 def __init__(self, config=None, loop=False):
346 from simple_config import SimpleConfig
347 config = SimpleConfig()
349 threading.Thread.__init__(self)
353 self.connect_event = threading.Event()
355 self.subscriptions = {}
357 self.responses['default'] = Queue.Queue()
360 self.lock = threading.Lock()
362 self.servers = [] # actual list from IRC
364 self.bytes_received = 0
368 def init_interface(self):
369 if self.config.get('server'):
370 self.init_with_server(self.config)
372 print "Using random server..."
373 servers = DEFAULT_SERVERS[:]
375 server = random.choice( servers )
376 servers.remove(server)
377 self.config.set_key('server', server, False)
378 self.init_with_server(self.config)
379 if self.is_connected: break
382 print 'no server available'
383 self.is_connected = False
384 self.connect_event.set() # to finish start
385 self.server = 'ecdsa.org:50001:t'
389 self.connect_event.set()
390 if self.is_connected:
391 self.send([('server.version', [ELECTRUM_VERSION, '0.5'])])
392 self.trigger_callback('connected')
394 self.trigger_callback('notconnected')
395 #print_error("Failed to connect " + self.connection_msg)
398 def init_with_server(self, config):
400 s = config.get('server')
401 host, port, protocol = s.split(':')
404 self.protocol = protocol
405 proxy = self.parse_proxy_options(config.get('proxy'))
406 self.server = host + ':%d:%s'%(port, protocol)
408 #print protocol, host, port
410 self.init_tcp(host, port, proxy, use_ssl=(protocol=='s'))
411 elif protocol in 'gh':
412 self.init_http(host, port, proxy, use_ssl=(protocol=='g'))
414 raise BaseException('Unknown protocol: %s'%protocol)
417 def send(self, messages, channel='default'):
420 for message in messages:
422 if m[-10:] == '.subscribe':
427 if self.subscriptions.get(channel) is None:
428 self.subscriptions[channel] = []
430 if message not in self.subscriptions[channel]:
431 self.subscriptions[channel].append(message)
433 if self.protocol in 'st':
435 out = self.send_tcp(messages, channel)
437 # do not use lock, http is synchronous
438 out = self.send_http(messages, channel)
442 def resend_subscriptions(self):
443 for channel, messages in self.subscriptions.items():
445 self.send(messages, channel)
449 def parse_proxy_options(self, s):
450 if type(s) == type({}): return s # fixme: type should be fixed
451 if type(s) != type(""): return None
452 if s.lower() == 'none': return None
453 proxy = { "mode":"socks5", "host":"localhost" }
456 if proxy_modes.count(args[n]) == 1:
457 proxy["mode"] = args[n]
460 proxy["host"] = args[n]
463 proxy["port"] = args[n]
465 proxy["port"] = "8080" if proxy["mode"] == "http" else "1080"
469 def set_server(self, server, proxy=None):
470 # raise an error if the format isnt correct
471 a,b,c = server.split(':')
475 if server != self.server or proxy != self.proxy:
476 print "changing server:", server, proxy
479 if self.protocol in 'st' and self.s:
480 self.s.shutdown(socket.SHUT_RDWR)
482 self.is_connected = False # this exits the polling loop
483 self.trigger_callback('disconnecting') # for actively disconnecting
485 def is_empty(self, channel):
486 q = self.responses.get(channel)
493 def get_pending_requests(self, channel):
496 for k, v in self.unanswered_requests.items():
498 if c == channel: result.append(k)
501 def is_up_to_date(self, channel):
502 return self.is_empty(channel) and not self.get_pending_requests(channel)
505 def synchronous_get(self, requests, timeout=100000000):
506 # todo: use generators, unanswered_requests should be a list of arrays...
507 ids = self.send(requests)
511 r = self.responses['default'].get(True, timeout)
515 res[_id] = r.get('result')
523 threading.Thread.start(self)
524 # wait until connection is established
525 self.connect_event.wait()
529 self.init_interface()
530 if self.is_connected:
531 self.resend_subscriptions()
532 self.run_tcp() if self.protocol in 'st' else self.run_http()
534 self.trigger_callback('disconnected')
536 if not self.loop: break