#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2015 Thomas Voegtlin
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import ast
import os
import sys
import time
import jsonrpclib
from jsonrpclib.SimpleJSONRPCServer import SimpleJSONRPCServer, SimpleJSONRPCRequestHandler
from network import Network
from util import json_decode, DaemonThread
from util import print_msg, print_error, print_stderr
from wallet import WalletStorage, Wallet
from wizard import WizardBase
from commands import known_commands, Commands
from simple_config import SimpleConfig
def get_lockfile(config):
return os.path.join(config.path, 'daemon')
def remove_lockfile(lockfile):
os.unlink(lockfile)
def get_fd_or_server(config):
'''Tries to create the lockfile, using O_EXCL to
prevent races. If it succeeds it returns the FD.
Otherwise try and connect to the server specified in the lockfile.
If this succeeds, the server is returned. Otherwise remove the
lockfile and try again.'''
lockfile = get_lockfile(config)
while True:
try:
return os.open(lockfile, os.O_CREAT | os.O_EXCL | os.O_WRONLY), None
except OSError:
pass
server = get_server(config)
if server is not None:
return None, server
# Couldn't connect; remove lockfile and try again.
remove_lockfile(lockfile)
def get_server(config):
lockfile = get_lockfile(config)
while True:
create_time = None
try:
with open(lockfile) as f:
(host, port), create_time = ast.literal_eval(f.read())
server = jsonrpclib.Server('http://%s:%d' % (host, port))
# Test daemon is running
server.ping()
return server
except:
pass
if not create_time or create_time < time.time() - 1.0:
return None
# Sleep a bit and try again; it might have just been started
time.sleep(1.0)
class RequestHandler(SimpleJSONRPCRequestHandler):
def do_OPTIONS(self):
self.send_response(200)
self.end_headers()
def end_headers(self):
self.send_header("Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept")
self.send_header("Access-Control-Allow-Origin", "*")
SimpleJSONRPCRequestHandler.end_headers(self)
class Daemon(DaemonThread):
def __init__(self, config, fd):
DaemonThread.__init__(self)
self.config = config
if config.get('offline'):
self.network = None
else:
self.network = Network(config)
self.network.start()
self.gui = None
self.wallets = {}
# Setup server
cmd_runner = Commands(self.config, None, self.network)
host = config.get('rpchost', 'localhost')
port = config.get('rpcport', 0)
server = SimpleJSONRPCServer((host, port), logRequests=False,
requestHandler=RequestHandler)
os.write(fd, repr((server.socket.getsockname(), time.time())))
os.close(fd)
server.timeout = 0.1
for cmdname in known_commands:
server.register_function(getattr(cmd_runner, cmdname), cmdname)
server.register_function(self.run_cmdline, 'run_cmdline')
server.register_function(self.ping, 'ping')
server.register_function(self.run_daemon, 'daemon')
server.register_function(self.run_gui, 'gui')
self.server = server
def ping(self):
return True
def run_daemon(self, config):
sub = config.get('subcommand')
assert sub in ['start', 'stop', 'status']
if sub == 'start':
response = "Daemon already running"
elif sub == 'status':
if self.network:
p = self.network.get_parameters()
response = {
'path': self.network.config.path,
'server': p[0],
'blockchain_height': self.network.get_local_height(),
'server_height': self.network.get_server_height(),
'nodes': self.network.get_interfaces(),
'connected': self.network.is_connected(),
'auto_connect': p[4],
'wallets': {k: w.is_up_to_date()
for k, w in self.wallets.items()},
}
else:
response = "Daemon offline"
elif sub == 'stop':
self.stop()
response = "Daemon stopped"
return response
def run_gui(self, config_options):
config = SimpleConfig(config_options)
if self.gui:
if hasattr(self.gui, 'new_window'):
path = config.get_wallet_path()
self.gui.new_window(path, config.get('url'))
response = "ok"
else:
response = "error: current GUI does not support multiple windows"
else:
response = "Error: Electrum is running in daemon mode. Please stop the daemon first."
return response
def load_wallet(self, path, get_wizard=None):
if path in self.wallets:
wallet = self.wallets[path]
else:
storage = WalletStorage(path)
if get_wizard:
if storage.file_exists:
wallet = Wallet(storage)
action = wallet.get_action()
else:
action = 'new'
if action:
wizard = get_wizard()
wallet = wizard.run(self.network, storage)
else:
wallet.start_threads(self.network)
else:
wallet = Wallet(storage)
wallet.start_threads(self.network)
if wallet:
self.wallets[path] = wallet
return wallet
def run_cmdline(self, config_options):
config = SimpleConfig(config_options)
cmdname = config.get('cmd')
cmd = known_commands[cmdname]
path = config.get_wallet_path()
wallet = self.load_wallet(path) if cmd.requires_wallet else None
# arguments passed to function
args = map(lambda x: config.get(x), cmd.params)
# decode json arguments
args = map(json_decode, args)
# options
args += map(lambda x: config.get(x), cmd.options)
cmd_runner = Commands(config, wallet, self.network,
password=config_options.get('password'),
new_password=config_options.get('new_password'))
func = getattr(cmd_runner, cmd.name)
result = func(*args)
return result
def run(self):
while self.is_running():
self.server.handle_request()
for k, wallet in self.wallets.items():
wallet.stop_threads()
if self.network:
self.print_error("shutting down network")
self.network.stop()
self.network.join()
def stop(self):
self.print_error("stopping, removing lockfile")
remove_lockfile(get_lockfile(self.config))
DaemonThread.stop(self)
def init_gui(self, config, plugins):
gui_name = config.get('gui', 'qt')
if gui_name in ['lite', 'classic']:
gui_name = 'qt'
gui = __import__('electrum_gui.' + gui_name, fromlist=['electrum_gui'])
self.gui = gui.ElectrumGui(config, self, plugins)
self.gui.main()