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385 lines
16 KiB
385 lines
16 KiB
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2012 thomasv@gitorious
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import socket
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from PyQt4.QtGui import *
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from PyQt4.QtCore import *
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from electrum.i18n import _
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from electrum.network import DEFAULT_PORTS
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from electrum.network import serialize_server, deserialize_server
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from util import *
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protocol_names = ['TCP', 'SSL']
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protocol_letters = 'ts'
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class NetworkDialog(WindowModalDialog):
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def __init__(self, network, config, parent):
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WindowModalDialog.__init__(self, parent, _('Network'))
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self.setMinimumSize(400, 20)
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self.nlayout = NetworkChoiceLayout(network, config)
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vbox = QVBoxLayout(self)
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vbox.addLayout(self.nlayout.layout())
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vbox.addLayout(Buttons(CancelButton(self), OkButton(self)))
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def do_exec(self):
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result = self.exec_()
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if result:
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self.nlayout.accept()
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return result
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class NetworkChoiceLayout(object):
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def __init__(self, network, config, wizard=False):
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self.network = network
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self.config = config
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self.protocol = None
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self.tor_proxy = None
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self.servers = network.get_servers()
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host, port, protocol, proxy_config, auto_connect = network.get_parameters()
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if not proxy_config:
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proxy_config = { "mode":"none", "host":"localhost", "port":"9050"}
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if not wizard:
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if network.is_connected():
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status = _("Server") + ": %s"%(host)
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else:
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status = _("Disconnected from server")
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else:
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status = _("Please choose a server.") + "\n" + _("Press 'Next' if you are offline.")
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tabs = QTabWidget()
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server_tab = QWidget()
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proxy_tab = QWidget()
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blockchain_tab = QWidget()
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tabs.addTab(server_tab, _('Server'))
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tabs.addTab(proxy_tab, _('Proxy'))
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tabs.addTab(blockchain_tab, _('Blockchain'))
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# server tab
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grid = QGridLayout(server_tab)
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grid.setSpacing(8)
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# server
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self.server_host = QLineEdit()
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self.server_host.setFixedWidth(200)
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self.server_port = QLineEdit()
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self.server_port.setFixedWidth(60)
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# use SSL
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self.ssl_cb = QCheckBox(_('Use SSL'))
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self.ssl_cb.setChecked(auto_connect)
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self.ssl_cb.stateChanged.connect(self.change_protocol)
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# auto connect
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self.autoconnect_cb = QCheckBox(_('Select server automatically'))
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self.autoconnect_cb.setChecked(auto_connect)
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self.autoconnect_cb.setEnabled(self.config.is_modifiable('auto_connect'))
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msg = _("Electrum sends your wallet addresses to a single server, in order to receive your transaction history.")
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grid.addWidget(QLabel(_('Server') + ':'), 0, 0)
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grid.addWidget(self.server_host, 0, 1, 1, 2)
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grid.addWidget(self.server_port, 0, 3)
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grid.addWidget(HelpButton(msg), 0, 4)
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msg = ' '.join([
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_("If auto-connect is enabled, Electrum will always use a server that is on the longest blockchain."),
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_("If it is disabled, you have to choose a server you want to use. Electrum will warn you if your server is lagging.")
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])
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grid.addWidget(self.ssl_cb, 1, 1, 1, 3)
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grid.addWidget(self.autoconnect_cb, 2, 1, 1, 3)
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grid.addWidget(HelpButton(msg), 2, 4)
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label = _('Active Servers') if network.is_connected() else _('Default Servers')
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self.servers_list_widget = QTreeWidget()
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self.servers_list_widget.setHeaderLabels( [ label, _('Limit') ] )
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self.servers_list_widget.setMaximumHeight(150)
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self.servers_list_widget.setColumnWidth(0, 240)
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grid.addWidget(self.servers_list_widget, 3, 0, 1, 5)
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def enable_set_server():
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if config.is_modifiable('server'):
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enabled = not self.autoconnect_cb.isChecked()
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self.server_host.setEnabled(enabled)
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self.server_port.setEnabled(enabled)
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self.servers_list_widget.setEnabled(enabled)
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else:
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for w in [self.autoconnect_cb, self.server_host, self.server_port, self.ssl_cb, self.servers_list_widget]:
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w.setEnabled(False)
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self.autoconnect_cb.clicked.connect(enable_set_server)
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enable_set_server()
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# Proxy tab
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grid = QGridLayout(proxy_tab)
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grid.setSpacing(8)
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# proxy setting
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self.proxy_mode = QComboBox()
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self.proxy_host = QLineEdit()
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self.proxy_host.setFixedWidth(200)
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self.proxy_port = QLineEdit()
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self.proxy_port.setFixedWidth(60)
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self.proxy_mode.addItems(['NONE', 'SOCKS4', 'SOCKS5', 'HTTP'])
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self.proxy_user = QLineEdit()
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self.proxy_user.setPlaceholderText(_("Proxy user"))
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self.proxy_password = QLineEdit()
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self.proxy_password.setPlaceholderText(_("Password"))
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self.proxy_password.setEchoMode(QLineEdit.Password)
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self.proxy_password.setFixedWidth(60)
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def check_for_disable(index = False):
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if self.config.is_modifiable('proxy'):
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for w in [self.proxy_host, self.proxy_port, self.proxy_user, self.proxy_password]:
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w.setEnabled(self.proxy_mode.currentText() != 'NONE')
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else:
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for w in [self.proxy_host, self.proxy_port, self.proxy_mode]: w.setEnabled(False)
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check_for_disable()
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self.proxy_mode.connect(self.proxy_mode, SIGNAL('currentIndexChanged(int)'), check_for_disable)
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self.proxy_mode.setCurrentIndex(self.proxy_mode.findText(str(proxy_config.get("mode").upper())))
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self.proxy_host.setText(proxy_config.get("host"))
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self.proxy_port.setText(proxy_config.get("port"))
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self.proxy_user.setText(proxy_config.get("user", ""))
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self.proxy_password.setText(proxy_config.get("password", ""))
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self.proxy_mode.connect(self.proxy_mode, SIGNAL('currentIndexChanged(int)'), self.proxy_settings_changed)
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self.proxy_host.connect(self.proxy_host, SIGNAL('textEdited(QString)'), self.proxy_settings_changed)
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self.proxy_port.connect(self.proxy_port, SIGNAL('textEdited(QString)'), self.proxy_settings_changed)
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self.proxy_user.connect(self.proxy_user, SIGNAL('textEdited(QString)'), self.proxy_settings_changed)
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self.proxy_password.connect(self.proxy_password, SIGNAL('textEdited(QString)'), self.proxy_settings_changed)
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self.tor_cb = QCheckBox(_("Use Tor Proxy"))
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self.tor_cb.setIcon(QIcon(":icons/tor_logo.png"))
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self.tor_cb.hide()
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self.tor_cb.clicked.connect(self.use_tor_proxy)
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grid.addWidget(self.tor_cb, 1, 0, 1, 3)
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grid.addWidget(self.proxy_mode, 4, 1)
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grid.addWidget(self.proxy_host, 4, 2)
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grid.addWidget(self.proxy_port, 4, 3)
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grid.addWidget(self.proxy_user, 5, 2)
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grid.addWidget(self.proxy_password, 5, 3)
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grid.setRowStretch(6, 1)
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# Blockchain Tab
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from electrum import bitcoin
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from amountedit import AmountEdit
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grid = QGridLayout(blockchain_tab)
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n = len(network.get_interfaces())
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status = _("Connected to %d nodes.")%n if n else _("Not connected")
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height_str = "%d "%(network.get_local_height()) + _("blocks")
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self.checkpoint_height, self.checkpoint_value = network.blockchain.get_checkpoint()
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self.cph_label = QLabel(_('Height'))
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self.cph = QLineEdit("%d"%self.checkpoint_height)
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self.cph.setFixedWidth(80)
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self.cpv_label = QLabel(_('Hash'))
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self.cpv = QLineEdit(self.checkpoint_value)
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self.cpv.setCursorPosition(0)
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self.cpv.setFocusPolicy(Qt.NoFocus)
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self.cpv.setReadOnly(True)
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def on_cph():
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try:
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height = int(self.cph.text())
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except:
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height = 0
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self.cph.setText('%d'%height)
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if height == self.checkpoint_height:
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return
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try:
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self.network.print_error("fetching header")
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header = self.network.synchronous_get(('blockchain.block.get_header', [height]), 5)
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_hash = self.network.blockchain.hash_header(header)
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except BaseException as e:
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self.network.print_error(str(e))
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_hash = ''
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self.cpv.setText(_hash)
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self.cpv.setCursorPosition(0)
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if _hash:
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self.checkpoint_height = height
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self.checkpoint_value = _hash
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self.cph.editingFinished.connect(on_cph)
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msg = ' '.join([
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_("Electrum connects to several nodes in order to download block headers and find out the longest blockchain."),
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_("This blockchain is used to verify the transactions sent by your transaction server.")
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])
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grid.addWidget(QLabel(_('Status') + ':'), 0, 0)
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grid.addWidget(QLabel(status), 0, 1, 1, 3)
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grid.addWidget(HelpButton(msg), 0, 4)
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msg = _('This is the height of your local copy of the blockchain.')
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grid.addWidget(QLabel(_("Height") + ':'), 1, 0)
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grid.addWidget(QLabel(height_str), 1, 1)
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grid.addWidget(HelpButton(msg), 1, 4)
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msg = ''.join([
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_('A checkpoint can be used to verify that you are on the correct blockchain.'), ' ',
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_('By default, your checkpoint is the genesis block.'), '\n\n',
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_('If you edit the height field, the corresponding block hash will be fetched from your current server.'), ' ',
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_('If you press OK, the checkpoint will be saved, and Electrum will only accept headers from nodes that pass this checkpoint.'), '\n\n',
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_('If there is a hard fork, you will have to check the block hash from an independent source, in order to be sure that you are on the desired side of the fork.'),
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])
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grid.addWidget(QLabel(_('Checkpoint') +':'), 3, 0, 1, 2)
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grid.addWidget(HelpButton(msg), 3, 4)
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grid.addWidget(self.cph_label, 4, 0)
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grid.addWidget(self.cph, 4, 1)
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grid.addWidget(self.cpv_label, 5, 0)
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grid.addWidget(self.cpv, 5, 1, 1, 4)
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grid.setRowStretch(7, 1)
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vbox = QVBoxLayout()
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vbox.addWidget(tabs)
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self.layout_ = vbox
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# tor detector
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self.td = td = TorDetector()
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td.found_proxy.connect(self.suggest_proxy)
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td.start()
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self.change_server(host, protocol)
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self.set_protocol(protocol)
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self.servers_list_widget.connect(
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self.servers_list_widget,
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SIGNAL('currentItemChanged(QTreeWidgetItem*,QTreeWidgetItem*)'),
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lambda x,y: self.server_changed(x))
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def layout(self):
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return self.layout_
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def init_servers_list(self):
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self.servers_list_widget.clear()
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for _host, d in sorted(self.servers.items()):
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if d.get(self.protocol):
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pruning_level = d.get('pruning','')
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self.servers_list_widget.addTopLevelItem(QTreeWidgetItem( [ _host, pruning_level ] ))
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def set_protocol(self, protocol):
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if protocol != self.protocol:
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self.protocol = protocol
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self.init_servers_list()
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def change_protocol(self, use_ssl):
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p = 's' if use_ssl else 't'
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host = unicode(self.server_host.text())
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pp = self.servers.get(host, DEFAULT_PORTS)
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if p not in pp.keys():
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p = pp.keys()[0]
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port = pp[p]
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self.server_host.setText( host )
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self.server_port.setText( port )
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self.set_protocol(p)
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def server_changed(self, x):
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if x:
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self.change_server(str(x.text(0)), self.protocol)
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def change_server(self, host, protocol):
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pp = self.servers.get(host, DEFAULT_PORTS)
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if protocol and protocol not in protocol_letters:
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protocol = None
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if protocol:
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port = pp.get(protocol)
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if port is None:
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protocol = None
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if not protocol:
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if 's' in pp.keys():
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protocol = 's'
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port = pp.get(protocol)
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else:
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protocol = pp.keys()[0]
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port = pp.get(protocol)
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self.server_host.setText( host )
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self.server_port.setText( port )
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self.ssl_cb.setChecked(protocol=='s')
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def accept(self):
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host = str(self.server_host.text())
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port = str(self.server_port.text())
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protocol = 's' if self.ssl_cb.isChecked() else 't'
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if self.proxy_mode.currentText() != 'NONE':
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proxy = { 'mode':str(self.proxy_mode.currentText()).lower(),
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'host':str(self.proxy_host.text()),
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'port':str(self.proxy_port.text()),
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'user':str(self.proxy_user.text()),
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'password':str(self.proxy_password.text())}
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else:
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proxy = None
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auto_connect = self.autoconnect_cb.isChecked()
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self.network.set_parameters(host, port, protocol, proxy, auto_connect)
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self.network.blockchain.set_checkpoint(self.checkpoint_height, self.checkpoint_value)
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def suggest_proxy(self, found_proxy):
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self.tor_proxy = found_proxy
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self.tor_cb.setText("Use Tor proxy at port " + str(found_proxy[1]))
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if self.proxy_mode.currentIndex() == 2 \
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and self.proxy_host.text() == "127.0.0.1" \
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and self.proxy_port.text() == str(found_proxy[1]):
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self.tor_cb.setChecked(True)
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self.tor_cb.show()
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def use_tor_proxy(self, use_it):
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# 2 = SOCKS5
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if not use_it:
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self.proxy_mode.setCurrentIndex(0)
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self.tor_cb.setChecked(False)
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else:
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self.proxy_mode.setCurrentIndex(2)
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self.proxy_host.setText("127.0.0.1")
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self.proxy_port.setText(str(self.tor_proxy[1]))
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self.proxy_user.setText("")
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self.proxy_password.setText("")
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self.tor_cb.setChecked(True)
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def proxy_settings_changed(self):
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self.tor_cb.setChecked(False)
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class TorDetector(QThread):
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found_proxy = pyqtSignal(object)
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def __init__(self):
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QThread.__init__(self)
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def run(self):
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# Probable ports for Tor to listen at
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ports = [9050, 9150]
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for p in ports:
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if TorDetector.is_tor_port(p):
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self.found_proxy.emit(("127.0.0.1", p))
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return
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@staticmethod
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def is_tor_port(port):
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try:
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s = socket._socketobject(socket.AF_INET, socket.SOCK_STREAM)
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s.settimeout(0.1)
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s.connect(("127.0.0.1", port))
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# Tor responds uniquely to HTTP-like requests
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s.send("GET\n")
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if "Tor is not an HTTP Proxy" in s.recv(1024):
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return True
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except socket.error:
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pass
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return False
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