plugins/labels.py

   1 from electrum.util import print_error
   2 from electrum_gui.i18n import _
   3 import httplib, urllib
   4 import socket
   5 import hashlib
   6 import json
   7 from urlparse import urlparse, parse_qs
   8 try:
   9     import PyQt4
  10 except:
  11     sys.exit("Error: Could not import PyQt4 on Linux systems, you may try 'sudo apt-get install python-qt4'")
  12
  13 from PyQt4.QtGui import *
  14 from PyQt4.QtCore import *
  15 import PyQt4.QtCore as QtCore
  16 import PyQt4.QtGui as QtGui
  17 import aes
  18 import base64
  19 from electrum_gui import bmp, pyqrnative, BasePlugin
  20 from electrum_gui.i18n import _
  21 from electrum_gui.gui_classic import HelpButton
  22
  23 class Plugin(BasePlugin):
  24     def version(self):
  25         return "0.2.1"
  26
  27     def encode(self, message):
  28         encrypted = aes.encryptData(self.encode_password, unicode(message))
  29         encoded_message = base64.b64encode(encrypted)
  30
  31         return encoded_message
  32
  33     def decode(self, message):
  34         decoded_message = aes.decryptData(self.encode_password, base64.b64decode(unicode(message)) )
  35
  36         return decoded_message
  37
  38     def __init__(self, gui):
  39         self.target_host = 'labelectrum.herokuapp.com'
  40         BasePlugin.__init__(self, gui, 'labels', _('Label Sync'), '%s\n\n%s%s%s' % (_("This plugin can sync your labels across multiple Electrum installs by using a remote database to save your data. Labels, transactions and addresses are all sent and stored encrypted on the remote server. This code might increase the load of your wallet with a few microseconds as it will sync labels on each startup."), _("To get started visit"), " http://labelectrum.herokuapp.com/", _(" to sign up for an account.")))
  41
  42         self.wallet = gui.wallet
  43         self.gui = gui
  44         self.config = gui.config
  45         self.labels = self.wallet.labels
  46         self.transactions = self.wallet.transactions
  47         self.encode_password = hashlib.sha1(self.config.get("master_public_key")).digest().encode('hex')[:32]
  48
  49         self.wallet_id = hashlib.sha256(str(self.config.get("master_public_key"))).digest().encode('hex')
  50
  51         addresses = []
  52         for k, account in self.wallet.accounts.items():
  53             for address in account[0]:
  54                 addresses.append(address)
  55
  56         self.addresses = addresses
  57
  58     def auth_token(self):
  59         return self.config.get("plugin_label_api_key")
  60
  61     def init_gui(self):
  62         if self.is_enabled() and self.auth_token():
  63             # If there is an auth token we can try to actually start syncing
  64             self.full_pull()
  65
  66     def is_available(self):
  67         return True
  68
  69     def requires_settings(self):
  70         return True
  71
  72     def set_label(self, item,label, changed):
  73         if not changed:
  74             return
  75         try:
  76             bundle = {"label": {"external_id": self.encode(item), "text": self.encode(label)}}
  77             params = json.dumps(bundle)
  78             connection = httplib.HTTPConnection(self.target_host)
  79             connection.request("POST", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
  80
  81             response = connection.getresponse()
  82             if response.reason == httplib.responses[httplib.NOT_FOUND]:
  83                 return
  84             response = json.loads(response.read())
  85         except socket.gaierror as e:
  86             print_error('Error connecting to service: %s ' %  e)
  87             return False
  88
  89     def settings_dialog(self):
  90         def check_for_api_key(api_key):
  91             if api_key and len(api_key) > 12:
  92               self.config.set_key("plugin_label_api_key", str(self.auth_token_edit.text()))
  93               self.upload.setEnabled(True)
  94               self.download.setEnabled(True)
  95               self.accept.setEnabled(True)
  96             else:
  97               self.upload.setEnabled(False)
  98               self.download.setEnabled(False)
  99               self.accept.setEnabled(False)
 100
 101         d = QDialog(self.gui)
 102         layout = QGridLayout(d)
 103         layout.addWidget(QLabel("API Key: "),0,0)
 104
 105         self.auth_token_edit = QLineEdit(self.auth_token())
 106         self.auth_token_edit.textChanged.connect(check_for_api_key)
 107
 108         layout.addWidget(QLabel("Label sync options: "),2,0)
 109         layout.addWidget(self.auth_token_edit, 0,1,1,2)
 110
 111         decrypt_key_text =  QLineEdit(self.encode_password)
 112         decrypt_key_text.setReadOnly(True)
 113         layout.addWidget(decrypt_key_text, 1,1)
 114         layout.addWidget(QLabel("Decryption key: "),1,0)
 115         layout.addWidget(HelpButton("This key can be used on the LabElectrum website to decrypt your data in case you want to review it online."),1,2)
 116
 117         self.upload = QPushButton("Force upload")
 118         self.upload.clicked.connect(self.full_push)
 119         layout.addWidget(self.upload, 2,1)
 120
 121         self.download = QPushButton("Force download")
 122         self.download.clicked.connect(lambda: self.full_pull(True))
 123         layout.addWidget(self.download, 2,2)
 124
 125         c = QPushButton(_("Cancel"))
 126         c.clicked.connect(d.reject)
 127
 128         self.accept = QPushButton(_("Done"))
 129         self.accept.clicked.connect(d.accept)
 130
 131         layout.addWidget(c,3,1)
 132         layout.addWidget(self.accept,3,2)
 133
 134         check_for_api_key(self.auth_token())
 135
 136         if d.exec_():
 137           return True
 138         else:
 139           return False
 140
 141     def toggle(self):
 142         enabled = not self.is_enabled()
 143         self.set_enabled(enabled)
 144         self.init_gui()
 145
 146         if not self.auth_token() and enabled: # First run, throw plugin settings in your face
 147             if self.settings_dialog():
 148               self.set_enabled(True)
 149               return True
 150             else:
 151               self.set_enabled(False)
 152               return False
 153         return enabled
 154
 155     def full_push(self):
 156         if self.do_full_push():
 157             QMessageBox.information(None, _("Labels uploaded"), _("Your labels have been uploaded."))
 158
 159     def full_pull(self, force = False):
 160         if self.do_full_pull(force) and force:
 161             QMessageBox.information(None, _("Labels synchronized"), _("Your labels have been synchronized."))
 162             self.gui.update_history_tab()
 163             self.gui.update_completions()
 164             self.gui.update_receive_tab()
 165             self.gui.update_contacts_tab()
 166
 167     def do_full_push(self):
 168         try:
 169             bundle = {"labels": {}}
 170             for key, value in self.labels.iteritems():
 171                 encoded = self.encode(key)
 172                 bundle["labels"][encoded] = self.encode(value)
 173
 174             params = json.dumps(bundle)
 175             connection = httplib.HTTPConnection(self.target_host)
 176             connection.request("POST", ("/api/wallets/%s/labels/batch.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
 177
 178             response = connection.getresponse()
 179             if response.reason == httplib.responses[httplib.NOT_FOUND]:
 180                 return
 181             try:
 182                 response = json.loads(response.read())
 183             except ValueError as e:
 184                 return False
 185
 186             if "error" in response:
 187                 QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 188                 return False
 189
 190             return True
 191         except socket.gaierror as e:
 192             print_error('Error connecting to service: %s ' %  e)
 193             return False
 194
 195     def do_full_pull(self, force = False):
 196         try:
 197             connection = httplib.HTTPConnection(self.target_host)
 198             connection.request("GET", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())),"", {'Content-Type': 'application/json'})
 199             response = connection.getresponse()
 200             if response.reason == httplib.responses[httplib.NOT_FOUND]:
 201                 return
 202             try:
 203                 response = json.loads(response.read())
 204             except ValueError as e:
 205                 return False
 206
 207             if "error" in response:
 208                 QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 209                 return False
 210
 211             for label in response:
 212                  decoded_key = self.decode(label["external_id"])
 213                  decoded_label = self.decode(label["text"])
 214                  if force or not self.labels.get(decoded_key):
 215                      self.labels[decoded_key] = decoded_label
 216             return True
 217         except socket.gaierror as e:
 218             print_error('Error connecting to service: %s ' %  e)
 219             return False