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'),_('This plugin can sync your labels accross multiple Electrum installs by using a remote database to save your data. Labels,  \
  41 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.\n\n\
  42 To get started visit http://labelectrum.herokuapp.com/ to sign up for an account.'))
  43
  44         self.wallet = gui.wallet
  45         self.gui = gui
  46         self.config = gui.config
  47         self.labels = self.wallet.labels
  48         self.transactions = self.wallet.transactions
  49         self.encode_password = hashlib.sha1(self.config.get("master_public_key")).digest().encode('hex')[:32]
  50
  51         self.wallet_id = hashlib.sha256(str(self.config.get("master_public_key"))).digest().encode('hex')
  52
  53         addresses = []
  54         for k, account in self.wallet.accounts.items():
  55             for address in account[0]:
  56                 addresses.append(address)
  57
  58         self.addresses = addresses
  59
  60     def auth_token(self):
  61         return self.config.get("plugin_label_api_key")
  62
  63     def init_gui(self):
  64         if self.is_enabled() and self.auth_token():
  65             # If there is an auth token we can try to actually start syncing
  66             self.full_pull()
  67
  68     def is_available(self):
  69         return True
  70
  71     def requires_settings(self):
  72         return True
  73
  74     def set_label(self, item,label, changed):
  75         if not changed:
  76             return
  77         try:
  78             bundle = {"label": {"external_id": self.encode(item), "text": self.encode(label)}}
  79             params = json.dumps(bundle)
  80             connection = httplib.HTTPConnection(self.target_host)
  81             connection.request("POST", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
  82
  83             response = connection.getresponse()
  84             if response.reason == httplib.responses[httplib.NOT_FOUND]:
  85                 return
  86             response = json.loads(response.read())
  87         except socket.gaierror as e:
  88             print_error('Error connecting to service: %s ' %  e)
  89             return False
  90
  91     def settings_dialog(self):
  92         def check_for_api_key(api_key):
  93             if api_key and len(api_key) > 12:
  94               self.config.set_key("plugin_label_api_key", str(self.auth_token_edit.text()))
  95               self.upload.setEnabled(True)
  96               self.download.setEnabled(True)
  97               self.accept.setEnabled(True)
  98             else:
  99               self.upload.setEnabled(False)
 100               self.download.setEnabled(False)
 101               self.accept.setEnabled(False)
 102
 103         d = QDialog(self.gui)
 104         layout = QGridLayout(d)
 105         layout.addWidget(QLabel("API Key: "),0,0)
 106
 107         self.auth_token_edit = QLineEdit(self.auth_token())
 108         self.auth_token_edit.textChanged.connect(check_for_api_key)
 109
 110         layout.addWidget(QLabel("Label sync options: "),2,0)
 111         layout.addWidget(self.auth_token_edit, 0,1,1,2)
 112
 113         decrypt_key_text =  QLineEdit(self.encode_password)
 114         decrypt_key_text.setReadOnly(True)
 115         layout.addWidget(decrypt_key_text, 1,1)
 116         layout.addWidget(QLabel("Decryption key: "),1,0)
 117         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)
 118
 119         self.upload = QPushButton("Force upload")
 120         self.upload.clicked.connect(self.full_push)
 121         layout.addWidget(self.upload, 2,1)
 122
 123         self.download = QPushButton("Force download")
 124         self.download.clicked.connect(lambda: self.full_pull(True))
 125         layout.addWidget(self.download, 2,2)
 126
 127         c = QPushButton(_("Cancel"))
 128         c.clicked.connect(d.reject)
 129
 130         self.accept = QPushButton(_("Done"))
 131         self.accept.clicked.connect(d.accept)
 132
 133         layout.addWidget(c,3,1)
 134         layout.addWidget(self.accept,3,2)
 135
 136         check_for_api_key(self.auth_token())
 137
 138         if d.exec_():
 139           return True
 140         else:
 141           return False
 142
 143     def toggle(self):
 144         enabled = not self.is_enabled()
 145         self.set_enabled(enabled)
 146         self.init_gui()
 147
 148         if not self.auth_token() and enabled: # First run, throw plugin settings in your face
 149             if self.settings_dialog():
 150               self.set_enabled(True)
 151               return True
 152             else:
 153               self.set_enabled(False)
 154               return False
 155         return enabled
 156
 157     def full_push(self):
 158         if self.do_full_push():
 159             QMessageBox.information(None, _("Labels uploaded"), _("Your labels have been uploaded."))
 160
 161     def full_pull(self, force = False):
 162         if self.do_full_pull(force) and force:
 163             QMessageBox.information(None, _("Labels synchronized"), _("Your labels have been synchronized."))
 164             self.gui.update_history_tab()
 165             self.gui.update_completions()
 166             self.gui.update_receive_tab()
 167             self.gui.update_contacts_tab()
 168
 169     def do_full_push(self):
 170         try:
 171             bundle = {"labels": {}}
 172             for key, value in self.labels.iteritems():
 173                 encoded = self.encode(key)
 174                 bundle["labels"][encoded] = self.encode(value)
 175
 176             params = json.dumps(bundle)
 177             connection = httplib.HTTPConnection(self.target_host)
 178             connection.request("POST", ("/api/wallets/%s/labels/batch.json?auth_token=%s" % (self.wallet_id, self.auth_token())), params, {'Content-Type': 'application/json'})
 179
 180             response = connection.getresponse()
 181             if response.reason == httplib.responses[httplib.NOT_FOUND]:
 182                 return
 183             try:
 184                 response = json.loads(response.read())
 185             except ValueError as e:
 186                 return False
 187
 188             if "error" in response:
 189                 QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 190                 return False
 191
 192             return True
 193         except socket.gaierror as e:
 194             print_error('Error connecting to service: %s ' %  e)
 195             return False
 196
 197     def do_full_pull(self, force = False):
 198         try:
 199             connection = httplib.HTTPConnection(self.target_host)
 200             connection.request("GET", ("/api/wallets/%s/labels.json?auth_token=%s" % (self.wallet_id, self.auth_token())),"", {'Content-Type': 'application/json'})
 201             response = connection.getresponse()
 202             if response.reason == httplib.responses[httplib.NOT_FOUND]:
 203                 return
 204             try:
 205                 response = json.loads(response.read())
 206             except ValueError as e:
 207                 return False
 208
 209             if "error" in response:
 210                 QMessageBox.warning(None, _("Error"),_("Could not sync labels: %s" % response["error"]))
 211                 return False
 212
 213             for label in response:
 214                  decoded_key = self.decode(label["external_id"])
 215                  decoded_label = self.decode(label["text"])
 216                  if force or not self.labels.get(decoded_key):
 217                      self.labels[decoded_key] = decoded_label
 218             return True
 219         except socket.gaierror as e:
 220             print_error('Error connecting to service: %s ' %  e)
 221             return False