PyBitmessage-2021-04-27/src/bmconfigparser.py

194 lines
6.5 KiB
Python

"""
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,
"udp": "True"
},
"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 _reset(self):
"""Reset current config. There doesn't appear to be a built in
method for this"""
sections = self.sections()
for x in sections:
self.remove_section(x)
def read(self, filenames):
"""Read config and populate defaults"""
self._reset()
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