/usr/share/pyshared/ZConfig/datatypes.py is in python-zconfig 2.9.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (c) 2002, 2003 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Selection of standard datatypes for ZConfig."""
import os
import re
import sys
import datetime
try:
unicode
except NameError:
have_unicode = False
else:
have_unicode = True
class MemoizedConversion:
"""Conversion helper that caches the results of expensive conversions."""
def __init__(self, conversion):
self._memo = {}
self._conversion = conversion
def __call__(self, value):
try:
return self._memo[value]
except KeyError:
v = self._conversion(value)
self._memo[value] = v
return v
class RangeCheckedConversion:
"""Conversion helper that range checks another conversion."""
def __init__(self, conversion, min=None, max=None):
self._min = min
self._max = max
self._conversion = conversion
def __call__(self, value):
v = self._conversion(value)
if self._min is not None and v < self._min:
raise ValueError("%s is below lower bound (%s)"
% (`v`, `self._min`))
if self._max is not None and v > self._max:
raise ValueError("%s is above upper bound (%s)"
% (`v`, `self._max`))
return v
class RegularExpressionConversion:
reason = "value did not match regular expression"
def __init__(self, regex):
self._rx = re.compile(regex)
def __call__(self, value):
m = self._rx.match(value)
if m and m.group() == value:
return value
else:
raise ValueError("%s: %s" % (self.reason, repr(value)))
def check_locale(value):
import locale
prev = locale.setlocale(locale.LC_ALL)
try:
try:
locale.setlocale(locale.LC_ALL, value)
finally:
locale.setlocale(locale.LC_ALL, prev)
except locale.Error:
raise ValueError(
'The specified locale "%s" is not supported by your system.\n'
'See your operating system documentation for more\n'
'information on locale support.' % value)
else:
return value
class BasicKeyConversion(RegularExpressionConversion):
def __init__(self):
RegularExpressionConversion.__init__(self, "[a-zA-Z][-._a-zA-Z0-9]*")
def __call__(self, value):
value = str(value)
return RegularExpressionConversion.__call__(self, value).lower()
class ASCIIConversion(RegularExpressionConversion):
def __call__(self, value):
value = RegularExpressionConversion.__call__(self, value)
if have_unicode and isinstance(value, unicode):
value = value.encode("ascii")
return value
_ident_re = "[_a-zA-Z][_a-zA-Z0-9]*"
class IdentifierConversion(ASCIIConversion):
reason = "not a valid Python identifier"
def __init__(self):
ASCIIConversion.__init__(self, _ident_re)
class DottedNameConversion(ASCIIConversion):
reason = "not a valid dotted name"
def __init__(self):
ASCIIConversion.__init__(self,
r"%s(?:\.%s)*" % (_ident_re, _ident_re))
class DottedNameSuffixConversion(ASCIIConversion):
reason = "not a valid dotted name or suffix"
def __init__(self):
ASCIIConversion.__init__(self,
r"(?:%s)(?:\.%s)*|(?:\.%s)+"
% (_ident_re, _ident_re, _ident_re))
def integer(value):
try:
return int(value)
except ValueError:
return long(value)
except OverflowError:
return long(value)
def null_conversion(value):
return value
def asBoolean(s):
"""Convert a string value to a boolean value."""
ss = str(s).lower()
if ss in ('yes', 'true', 'on'):
return True
elif ss in ('no', 'false', 'off'):
return False
else:
raise ValueError("not a valid boolean value: " + repr(s))
def string_list(s):
"""Convert a string to a list of strings using .split()."""
return s.split()
port_number = RangeCheckedConversion(integer, min=0, max=0xffff).__call__
class InetAddress:
def __init__(self, default_host):
self.DEFAULT_HOST = default_host
def __call__(self, s):
# returns (host, port) tuple
host = ''
port = None
if ":" in s:
host, p = s.rsplit(":", 1)
if host.startswith('[') and host.endswith(']'):
# [IPv6]:port
host = host[1:-1]
elif ':' in host:
# Unbracketed IPv6 address;
# last part is not the port number
host = s
p = None
if p: # else leave port at None
port = port_number(p)
host = host.lower()
else:
try:
port = port_number(s)
except ValueError:
if len(s.split()) != 1:
raise ValueError("not a valid host name: " + repr(s))
host = s.lower()
if not host:
host = self.DEFAULT_HOST
return host, port
if sys.platform[:3] == "win":
DEFAULT_HOST = "localhost"
else:
DEFAULT_HOST = ""
inet_address = InetAddress(DEFAULT_HOST)
inet_connection_address = InetAddress("127.0.0.1")
inet_binding_address = InetAddress("")
class SocketAddress:
# Parsing results in family and address
# Family can be AF_UNIX (for addresses that are path names)
# or AF_INET6 (for inet addresses with colons in them)
# or AF_INET (for all other inet addresses);
# An inet address is a (host, port) pair
# Notice that no DNS lookup is performed, so if the host
# is a DNS name, DNS lookup may end up with either IPv4 or
# IPv6 addresses, or both
def __init__(self, s):
import socket
if "/" in s or s.find(os.sep) >= 0:
self.family = getattr(socket, "AF_UNIX", None)
self.address = s
else:
self.family = socket.AF_INET
self.address = self._parse_address(s)
if ':' in self.address[0]:
self.family = socket.AF_INET6
def _parse_address(self, s):
return inet_address(s)
class SocketBindingAddress(SocketAddress):
def _parse_address(self, s):
return inet_binding_address(s)
class SocketConnectionAddress(SocketAddress):
def _parse_address(self, s):
return inet_connection_address(s)
def float_conversion(v):
if isinstance(v, basestring):
if v.lower() in ["inf", "-inf", "nan"]:
raise ValueError(`v` + " is not a portable float representation")
return float(v)
class IpaddrOrHostname(RegularExpressionConversion):
def __init__(self):
# IP address regex from the Perl Cookbook, Recipe 6.23 (revised ed.)
# We allow underscores in hostnames although this is considered
# illegal according to RFC1034.
# Addition: IPv6 addresses are now also accepted
expr = (r"(^(\d|[01]?\d\d|2[0-4]\d|25[0-5])\." #ipaddr
r"(\d|[01]?\d\d|2[0-4]\d|25[0-5])\." #ipaddr cont'd
r"(\d|[01]?\d\d|2[0-4]\d|25[0-5])\." #ipaddr cont'd
r"(\d|[01]?\d\d|2[0-4]\d|25[0-5])$)" #ipaddr cont'd
r"|([A-Za-z_][-A-Za-z0-9_.]*[-A-Za-z0-9_])" # or hostname
r"|([0-9A-Fa-f:.]+:[0-9A-Fa-f:.]*)" # or superset of IPv6 addresses
# (requiring at least one colon)
)
RegularExpressionConversion.__init__(self, expr)
def __call__(self, value):
result = RegularExpressionConversion.__call__(self, value).lower()
# Use C library to validate IPv6 addresses, in particular wrt.
# number of colons and number of digits per group
if ':' in result:
import socket
try:
socket.inet_pton(socket.AF_INET6, result)
except socket.error:
raise ValueError('%r is not a valid IPv6 address' % value)
return result
def existing_directory(v):
nv = os.path.expanduser(v)
if os.path.isdir(nv):
return nv
raise ValueError('%s is not an existing directory' % v)
def existing_path(v):
nv = os.path.expanduser(v)
if os.path.exists(nv):
return nv
raise ValueError('%s is not an existing path' % v)
def existing_file(v):
nv = os.path.expanduser(v)
if os.path.exists(nv):
return nv
raise ValueError('%s is not an existing file' % v)
def existing_dirpath(v):
nv = os.path.expanduser(v)
dir = os.path.dirname(nv)
if not dir:
# relative pathname with no directory component
return nv
if os.path.isdir(dir):
return nv
raise ValueError('The directory named as part of the path %s '
'does not exist.' % v)
class SuffixMultiplier:
# d is a dictionary of suffixes to integer multipliers. If no suffixes
# match, default is the multiplier. Matches are case insensitive. Return
# values are in the fundamental unit.
def __init__(self, d, default=1):
self._d = d
self._default = default
# all keys must be the same size
self._keysz = None
for k in d.keys():
if self._keysz is None:
self._keysz = len(k)
else:
assert self._keysz == len(k)
def __call__(self, v):
v = v.lower()
for s, m in self._d.items():
if v[-self._keysz:] == s:
return int(v[:-self._keysz]) * m
return int(v) * self._default
def timedelta(s):
# Unlike the standard time-interval data type, which returns a float
# number of seconds, this datatype takes a wider range of syntax and
# returns a datetime.timedelta
#
# Accepts suffixes:
# w - weeks
# d - days
# h - hours
# m - minutes
# s - seconds
#
# and all arguments may be integers or floats, positive or negative.
# More than one time interval suffix value may appear on the line, but
# they should all be separated by spaces, e.g.:
#
# sleep_time 4w 2d 7h 12m 0.00001s
weeks = days = hours = minutes = seconds = 0
for part in s.split():
val = float(part[:-1])
suffix = part[-1]
if suffix == 'w':
weeks = val
elif suffix == 'd':
days = val
elif suffix == 'h':
hours = val
elif suffix == 'm':
minutes = val
elif suffix == 's':
seconds = val
else:
raise TypeError('bad part %s in %s' % (part, s))
return datetime.timedelta(weeks=weeks, days=days, hours=hours,
minutes=minutes, seconds=seconds)
stock_datatypes = {
"boolean": asBoolean,
"dotted-name": DottedNameConversion(),
"dotted-suffix": DottedNameSuffixConversion(),
"identifier": IdentifierConversion(),
"integer": integer,
"float": float_conversion,
"string": str,
"string-list": string_list,
"null": null_conversion,
"locale": MemoizedConversion(check_locale),
"port-number": port_number,
"basic-key": BasicKeyConversion(),
"inet-address": inet_address,
"inet-binding-address": inet_binding_address,
"inet-connection-address": inet_connection_address,
"socket-address": SocketAddress,
"socket-binding-address": SocketBindingAddress,
"socket-connection-address": SocketConnectionAddress,
"ipaddr-or-hostname":IpaddrOrHostname(),
"existing-directory":existing_directory,
"existing-path": existing_path,
"existing-file": existing_file,
"existing-dirpath": existing_dirpath,
"byte-size": SuffixMultiplier({'kb': 1024,
'mb': 1024*1024,
'gb': 1024*1024*1024L,
}),
"time-interval": SuffixMultiplier({'s': 1,
'm': 60,
'h': 60*60,
'd': 60*60*24,
}),
"timedelta": timedelta,
}
class Registry:
def __init__(self, stock=None):
if stock is None:
stock = stock_datatypes.copy()
self._stock = stock
self._other = {}
self._basic_key = None
def get(self, name):
if '.' not in name:
if self._basic_key is None:
self._basic_key = self._other.get("basic-key")
if self._basic_key is None:
self._basic_key = self._stock.get("basic-key")
if self._basic_key is None:
self._basic_key = stock_datatypes["basic-key"]
name = self._basic_key(name)
t = self._stock.get(name)
if t is None:
t = self._other.get(name)
if t is None:
t = self.search(name)
return t
def register(self, name, conversion):
if self._stock.has_key(name):
raise ValueError("datatype name conflicts with built-in type: "
+ `name`)
if self._other.has_key(name):
raise ValueError("datatype name already registered: " + `name`)
self._other[name] = conversion
def search(self, name):
if not "." in name:
raise ValueError("unloadable datatype name: " + `name`)
components = name.split('.')
start = components[0]
g = {}
package = __import__(start, g, g)
modulenames = [start]
for component in components[1:]:
modulenames.append(component)
try:
package = getattr(package, component)
except AttributeError:
n = '.'.join(modulenames)
package = __import__(n, g, g, component)
self._other[name] = package
return package
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