387 lines
13 KiB
Python
387 lines
13 KiB
Python
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2011 thomasv@gitorious
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import random, socket, ast
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import thread, traceback, sys, time, json
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DEFAULT_TIMEOUT = 5
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DEFAULT_SERVERS = ['ecdsa.org','electrum.novit.ro'] # list of default servers
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class Interface:
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def __init__(self, host, port, address_callback=None, history_callback=None, newblock_callback=None):
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self.host = host
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self.port = port
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self.address_callback = address_callback
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self.history_callback = history_callback
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self.newblock_callback = newblock_callback
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self.servers = DEFAULT_SERVERS # actual list from IRC
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self.rtime = 0
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self.blocks = 0
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self.message = ''
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self.was_updated = True # fixme: use a semaphore
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self.is_up_to_date = False
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self.is_connected = False
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self.disconnected_event = threading.Event()
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self.disconnected_event.clear()
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def send_tx(self, data):
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out = self.handler('transaction.broadcast', data )
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return out
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def get_servers(self):
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pass
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def start_session(self, addresses, version):
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pass
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class PollingInterface(Interface):
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""" non-persistent connection. synchronous calls"""
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def start_session(self, addresses, version):
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out = self.handler('session.new', [ version, addresses ] )
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self.session_id, self.message = ast.literal_eval( out )
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thread.start_new_thread(self.poll_thread, ())
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def update_session(self, addresses):
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out = self.handler('session.update', [ self.session_id, addresses ] )
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return out
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def poll_interval(self):
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return 5
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def retrieve_history(self, address):
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out = self.handler('address.get_history', address )
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return out
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def get_history(self, addr):
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data = self.retrieve_history(addr)
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apply(self.history_callback, (addr, data) )
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self.was_updated = True
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def subscribe(self, addr):
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status = self.handler('address.subscribe', [ self.session_id, addr ] )
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apply(self.address_callback, (addr, status) )
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def update_wallet(self):
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while True:
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changed_addresses = self.poll()
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if changed_addresses:
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self.is_up_to_date = False
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else:
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self.is_up_to_date = True
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break
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for addr, status in changed_addresses.items():
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apply(self.address_callback, (addr, status))
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#if is_new or wallet.remote_url:
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# self.was_updated = True
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# is_new = wallet.synchronize()
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# wallet.update_tx_history()
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# wallet.save()
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# return is_new
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#else:
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# return False
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def poll(self):
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out = self.handler('session.poll', self.session_id )
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blocks, changed_addr = ast.literal_eval( out )
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if blocks == -1: raise BaseException("session not found")
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self.blocks = int(blocks)
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return changed_addr
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def poll_thread(self):
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while self.is_connected:
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try:
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self.update_wallet()
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time.sleep(self.poll_interval())
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except socket.gaierror:
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break
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except socket.error:
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break
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except:
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traceback.print_exc(file=sys.stdout)
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break
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self.is_connected = False
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self.disconnected_event.set()
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def get_servers(self):
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thread.start_new_thread(self.update_servers_thread, ())
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def update_servers_thread(self):
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# if my server is not reachable, I should get the list from one of the default servers
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# requesting servers could be an independent process
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while True:
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for server in DEFAULT_SERVERS:
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try:
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self.peers_server = server
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out = self.handler('peers')
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self.servers = map( lambda x:x[1], out )
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# print "Received server list from %s" % self.peers_server, out
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break
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except socket.timeout:
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continue
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except socket.error:
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continue
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except:
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traceback.print_exc(file=sys.stdout)
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time.sleep(5*60)
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class NativeInterface(PollingInterface):
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def handler(self, method, params = ''):
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import time
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cmds = {'session.new':'new_session',
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'peers':'peers',
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'session.poll':'poll',
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'session.update':'update_session',
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'transaction.broadcast':'tx',
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'address.get_history':'h',
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'address.subscribe':'address.subscribe'
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}
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cmd = cmds[method]
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if type(params) != type(''): params = repr( params )
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t1 = time.time()
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request = repr ( (cmd, params) ) + "#"
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s = socket.socket( socket.AF_INET, socket.SOCK_STREAM)
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s.settimeout(DEFAULT_TIMEOUT)
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s.connect(( self.host if cmd!='peers' else self.peers_server, self.port) )
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s.send( request )
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out = ''
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while 1:
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msg = s.recv(1024)
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if msg: out += msg
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else: break
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s.close()
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self.rtime = time.time() - t1
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self.is_connected = True
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if cmd in[ 'peers','h']:
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out = ast.literal_eval( out )
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return out
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class HttpInterface(PollingInterface):
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def handler(self, method, params = []):
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import urllib2, json, time
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if type(params) != type([]): params = [ params ]
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t1 = time.time()
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data = { 'method':method, 'id':'jsonrpc', 'params':params }
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data_json = json.dumps(data)
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host = 'http://%s:%d'%( self.host if method!='peers' else self.peers_server, self.port )
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req = urllib2.Request(host, data_json, {'content-type': 'application/json'})
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response_stream = urllib2.urlopen(req)
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response = json.loads( response_stream.read() )
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out = response.get('result')
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if not out:
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print response
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self.rtime = time.time() - t1
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self.is_connected = True
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return out
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import threading
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class AsynchronousInterface(Interface):
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"""json-rpc over persistent TCP connection, asynchronous"""
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def __init__(self, host, port, address_callback=None, history_callback=None, newblock_callback=None):
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Interface.__init__(self, host, port, address_callback, history_callback, newblock_callback)
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self.message_id = 0
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self.messages = {}
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self.tx_event = threading.Event()
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self.addresses_waiting_for_status = []
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self.addresses_waiting_for_history = []
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# up to date
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self.up_to_date_event = threading.Event()
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self.up_to_date_event.clear()
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def listen_thread(self):
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try:
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self.is_connected = True
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out = ''
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while self.is_connected:
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try: msg = self.s.recv(1024)
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except socket.timeout: continue
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out += msg
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if msg == '':
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self.is_connected = False
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print "disconnected."
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while True:
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s = out.find('\n')
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if s==-1: break
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c = out[0:s]
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out = out[s+1:]
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c = json.loads(c)
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#print c
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msg_id = c.get('id')
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result = c.get('result')
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error = c.get('error')
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if msg_id is None:
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print "error: message without ID"
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continue
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method, params = self.messages[msg_id]
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if method == 'server.banner':
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self.message = result
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self.was_updated = True
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elif method == 'server.peers':
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self.servers = map( lambda x:x[1], result )
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elif method == 'address.subscribe':
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addr = params[0]
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if addr in self.addresses_waiting_for_status:
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self.addresses_waiting_for_status.remove(addr)
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apply(self.address_callback,(addr, result))
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elif method == 'address.get_history':
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addr = params[0]
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if addr in self.addresses_waiting_for_history:
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self.addresses_waiting_for_history.remove(addr)
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apply(self.history_callback, (addr, result))
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self.was_updated = True
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elif method == 'transaction.broadcast':
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self.tx_result = result
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self.tx_event.set()
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elif method == 'numblocks.subscribe':
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self.blocks = result
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if self.newblock_callback: apply(self.newblock_callback,(result,))
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else:
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print "received message:", c
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if self.addresses_waiting_for_status or self.addresses_waiting_for_history:
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self.is_up_to_date = False
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else:
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self.is_up_to_date = True
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self.up_to_date_event.set()
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except:
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traceback.print_exc(file=sys.stdout)
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self.is_connected = False
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self.disconnected_event.set()
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def update_wallet(self,cb):
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self.up_to_date_event.wait()
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def send(self, messages):
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out = ''
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for m in messages:
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method, params = m
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request = json.dumps( { 'id':self.message_id, 'method':method, 'params':params } )
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self.messages[self.message_id] = (method, params)
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self.message_id += 1
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out += request + '\n'
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self.s.send( out )
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def send_tx(self, data):
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self.tx_event.clear()
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self.send([('transaction.broadcast', [data])])
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self.tx_event.wait()
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return self.tx_result
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def subscribe(self, addresses):
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messages = []
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for addr in addresses:
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messages.append(('address.subscribe', [addr]))
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self.addresses_waiting_for_status.append(addr)
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self.send(messages)
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def get_servers(self):
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self.send([('server.peers',[])])
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def get_history(self, addr):
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self.send([('address.get_history', [addr])])
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self.addresses_waiting_for_history.append(addr)
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def start_session(self, addresses, version):
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self.s = socket.socket( socket.AF_INET, socket.SOCK_STREAM )
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self.s.settimeout(1)
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self.s.connect(( self.host, self.port))
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thread.start_new_thread(self.listen_thread, ())
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self.send([('client.version', [version]), ('server.banner',[]), ('numblocks.subscribe',[])])
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self.subscribe(addresses)
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def new_interface(wallet):
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if wallet.host:
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host = wallet.host
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else:
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host = random.choice( DEFAULT_SERVERS ) # random choice when the wallet is created
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port = wallet.port
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address_cb = wallet.receive_status_callback
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history_cb = wallet.receive_history_callback
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if port == 50000:
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InterfaceClass = NativeInterface
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elif port == 50001:
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InterfaceClass = AsynchronousInterface
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elif port in [80, 81, 8080, 8081]:
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InterfaceClass = HttpInterface
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else:
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print "unknown port number: %d. using native protocol."%port
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InterfaceClass = NativeInterface
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interface = InterfaceClass(host, port, address_cb, history_cb)
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return interface
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def loop_interfaces_thread(wallet):
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while True:
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try:
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addresses = wallet.all_addresses()
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version = wallet.electrum_version
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wallet.interface.start_session(addresses, version)
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wallet.interface.get_servers()
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wallet.interface.disconnected_event.wait()
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print "Disconnected"
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except socket.error:
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print "socket error"
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time.sleep(5)
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except:
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traceback.print_exc(file=sys.stdout)
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continue
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print "Starting new session: %s:%d"%(wallet.host,wallet.port)
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wallet.interface = new_interface(wallet)
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