""" BMConfigParser class definition and default configuration settings """ import ConfigParser import os import shutil from datetime import datetime import state from singleton import Singleton BMConfigDefaults = { "bitmessagesettings": { "maxaddrperstreamsend": 500, "maxbootstrapconnections": 20, "maxdownloadrate": 0, "maxoutboundconnections": 8, "maxtotalconnections": 200, "maxuploadrate": 0, "apiinterface": "127.0.0.1", "apiport": 8442 }, "threads": { "receive": 3, }, "network": { "bind": '', "dandelion": 90, }, "inventory": { "storage": "sqlite", "acceptmismatch": False, }, "knownnodes": { "maxnodes": 20000, }, "zlib": { 'maxsize': 1048576 } } @Singleton class BMConfigParser(ConfigParser.SafeConfigParser): """ Singleton class inherited from :class:`ConfigParser.SafeConfigParser` with additional methods specific to bitmessage config. """ # pylint: disable=too-many-ancestors _temp = {} def set(self, section, option, value=None): if self._optcre is self.OPTCRE or value: if not isinstance(value, basestring): raise TypeError("option values must be strings") if not self.validate(section, option, value): raise ValueError("Invalid value %s" % value) return ConfigParser.ConfigParser.set(self, section, option, value) def get(self, section, option, raw=False, variables=None): # pylint: disable=arguments-differ try: if section == "bitmessagesettings" and option == "timeformat": return ConfigParser.ConfigParser.get( self, section, option, raw, variables) try: return self._temp[section][option] except KeyError: pass return ConfigParser.ConfigParser.get( self, section, option, True, variables) except ConfigParser.InterpolationError: return ConfigParser.ConfigParser.get( self, section, option, True, variables) except (ConfigParser.NoSectionError, ConfigParser.NoOptionError) as e: try: return BMConfigDefaults[section][option] except (KeyError, ValueError, AttributeError): raise e def setTemp(self, section, option, value=None): """Temporary set option to value, not saving.""" try: self._temp[section][option] = value except KeyError: self._temp[section] = {option: value} def safeGetBoolean(self, section, field): """Return value as boolean, False on exceptions""" try: return self.getboolean(section, field) except (ConfigParser.NoSectionError, ConfigParser.NoOptionError, ValueError, AttributeError): return False def safeGetInt(self, section, field, default=0): """Return value as integer, default on exceptions, 0 if default missing""" try: return self.getint(section, field) except (ConfigParser.NoSectionError, ConfigParser.NoOptionError, ValueError, AttributeError): return default def safeGet(self, section, option, default=None): """Return value as is, default on exceptions, None if default missing""" try: return self.get(section, option) except (ConfigParser.NoSectionError, ConfigParser.NoOptionError, ValueError, AttributeError): return default def items(self, section, raw=False, variables=None): """Return section variables as parent, but override the "raw" argument to always True""" # pylint: disable=arguments-differ return ConfigParser.ConfigParser.items(self, section, True, variables) @staticmethod def addresses(): """Return a list of local bitmessage addresses (from section labels)""" return [ x for x in BMConfigParser().sections() if x.startswith('BM-')] def read(self, filenames): ConfigParser.ConfigParser.read(self, filenames) for section in self.sections(): for option in self.options(section): try: if not self.validate( section, option, ConfigParser.ConfigParser.get(self, section, option) ): try: newVal = BMConfigDefaults[section][option] except KeyError: continue ConfigParser.ConfigParser.set( self, section, option, newVal) except ConfigParser.InterpolationError: continue def save(self): """Save the runtime config onto the filesystem""" fileName = os.path.join(state.appdata, 'keys.dat') fileNameBak = '.'.join([ fileName, datetime.now().strftime("%Y%j%H%M%S%f"), 'bak']) # create a backup copy to prevent the accidental loss due to # the disk write failure try: shutil.copyfile(fileName, fileNameBak) # The backup succeeded. fileNameExisted = True except (IOError, Exception): # The backup failed. This can happen if the file # didn't exist before. fileNameExisted = False # write the file with open(fileName, 'wb') as configfile: self.write(configfile) # delete the backup if fileNameExisted: os.remove(fileNameBak) def validate(self, section, option, value): """Input validator interface (using factory pattern)""" try: return getattr(self, 'validate_%s_%s' % (section, option))(value) except AttributeError: return True @staticmethod def validate_bitmessagesettings_maxoutboundconnections(value): """Reject maxoutboundconnections that are too high or too low""" try: value = int(value) except ValueError: return False if value < 0 or value > 8: return False return True