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# -*- coding: utf-8 -*-
## --------------------------------------------------------------------
## Amazon S3 manager
##
## Authors : Michal Ludvig <michal@logix.cz> (https://www.logix.cz/michal)
## Florent Viard <florent@sodria.com> (https://www.sodria.com)
## Copyright : TGRMN Software, Sodria SAS and contributors
## License : GPL Version 2
## Website : https://s3tools.org
## --------------------------------------------------------------------
from __future__ import absolute_import, division
import os
import time
import re
import string as string_mod
import random
import errno
from logging import debug
try:
unicode
except NameError:
# python 3 support
# In python 3, unicode -> str, and str -> bytes
unicode = str
import S3.Config
import S3.Exceptions
from S3.BaseUtils import (base_urlencode_string, base_replace_nonprintables,
base_unicodise, base_deunicodise, md5)
__all__ = []
def formatSize(size, human_readable=False, floating_point=False):
size = floating_point and float(size) or int(size)
if human_readable:
coeffs = ['K', 'M', 'G', 'T']
coeff = ""
while size > 2048:
size /= 1024
coeff = coeffs.pop(0)
return (floating_point and float(size) or int(size), coeff)
else:
return (size, "")
__all__.append("formatSize")
def convertHeaderTupleListToDict(list):
"""
Header keys are always in lowercase in python2 but not in python3.
"""
retval = {}
for tuple in list:
retval[tuple[0].lower()] = tuple[1]
return retval
__all__.append("convertHeaderTupleListToDict")
_rnd_chars = string_mod.ascii_letters + string_mod.digits
_rnd_chars_len = len(_rnd_chars)
def rndstr(len):
retval = ""
while len > 0:
retval += _rnd_chars[random.randint(0, _rnd_chars_len-1)]
len -= 1
return retval
__all__.append("rndstr")
def mktmpsomething(prefix, randchars, createfunc):
old_umask = os.umask(0o077)
tries = 5
while tries > 0:
dirname = prefix + rndstr(randchars)
try:
createfunc(dirname)
break
except OSError as e:
if e.errno != errno.EEXIST:
os.umask(old_umask)
raise
tries -= 1
os.umask(old_umask)
return dirname
__all__.append("mktmpsomething")
def mktmpdir(prefix = os.getenv('TMP','/tmp') + "/tmpdir-", randchars = 10):
return mktmpsomething(prefix, randchars, os.mkdir)
__all__.append("mktmpdir")
def mktmpfile(prefix = os.getenv('TMP','/tmp') + "/tmpfile-", randchars = 20):
createfunc = lambda filename : os.close(os.open(deunicodise(filename), os.O_CREAT | os.O_EXCL))
return mktmpsomething(prefix, randchars, createfunc)
__all__.append("mktmpfile")
def mkdir_with_parents(dir_name):
"""
mkdir_with_parents(dst_dir)
Create directory 'dir_name' with all parent directories
Returns True on success, False otherwise.
"""
pathmembers = dir_name.split(os.sep)
tmp_stack = []
while pathmembers and not os.path.isdir(deunicodise(os.sep.join(pathmembers))):
tmp_stack.append(pathmembers.pop())
while tmp_stack:
pathmembers.append(tmp_stack.pop())
cur_dir = os.sep.join(pathmembers)
try:
debug("mkdir(%s)" % cur_dir)
os.mkdir(deunicodise(cur_dir))
except (OSError, IOError) as e:
debug("Can not make directory '%s' (Reason: %s)" % (cur_dir, e.strerror))
return False
except Exception as e:
debug("Can not make directory '%s' (Reason: %s)" % (cur_dir, e))
return False
return True
__all__.append("mkdir_with_parents")
def unicodise(string, encoding=None, errors='replace', silent=False):
if not encoding:
encoding = S3.Config.Config().encoding
return base_unicodise(string, encoding, errors, silent)
__all__.append("unicodise")
def unicodise_s(string, encoding=None, errors='replace'):
"""
Alias to silent version of unicodise
"""
return unicodise(string, encoding, errors, True)
__all__.append("unicodise_s")
def deunicodise(string, encoding=None, errors='replace', silent=False):
if not encoding:
encoding = S3.Config.Config().encoding
return base_deunicodise(string, encoding, errors, silent)
__all__.append("deunicodise")
def deunicodise_s(string, encoding=None, errors='replace'):
"""
Alias to silent version of deunicodise
"""
return deunicodise(string, encoding, errors, True)
__all__.append("deunicodise_s")
def unicodise_safe(string, encoding=None):
"""
Convert 'string' to Unicode according to current encoding
and replace all invalid characters with '?'
"""
return unicodise(deunicodise(string, encoding), encoding).replace(u'\ufffd', '?')
__all__.append("unicodise_safe")
## Low level methods
def urlencode_string(string, urlencoding_mode=None, unicode_output=False):
if urlencoding_mode is None:
urlencoding_mode = S3.Config.Config().urlencoding_mode
return base_urlencode_string(string, urlencoding_mode, unicode_output)
__all__.append("urlencode_string")
def replace_nonprintables(string):
"""
replace_nonprintables(string)
Replaces all non-printable characters 'ch' in 'string'
where ord(ch) <= 26 with ^@, ^A, ... ^Z
"""
warning_message = (S3.Config.Config().urlencoding_mode != "fixbucket")
return base_replace_nonprintables(string, warning_message)
__all__.append("replace_nonprintables")
def time_to_epoch(t):
"""Convert time specified in a variety of forms into UNIX epoch time.
Accepts datetime.datetime, int, anything that has a strftime() method, and standard time 9-tuples
"""
if isinstance(t, int):
# Already an int
return t
elif isinstance(t, tuple) or isinstance(t, time.struct_time):
# Assume it's a time 9-tuple
return int(time.mktime(t))
elif hasattr(t, 'timetuple'):
# Looks like a datetime object or compatible
return int(time.mktime(t.timetuple()))
elif hasattr(t, 'strftime'):
# Looks like the object supports standard srftime()
return int(t.strftime('%s'))
elif isinstance(t, str) or isinstance(t, unicode) or isinstance(t, bytes):
# See if it's a string representation of an epoch
try:
# Support relative times (eg. "+60")
if t.startswith('+'):
return time.time() + int(t[1:])
return int(t)
except ValueError:
# Try to parse it as a timestamp string
try:
return time.strptime(t)
except ValueError as ex:
# Will fall through
debug("Failed to parse date with strptime: %s", ex)
pass
raise S3.Exceptions.ParameterError('Unable to convert %r to an epoch time. Pass an epoch time. Try `date -d \'now + 1 year\' +%%s` (shell) or time.mktime (Python).' % t)
def check_bucket_name(bucket, dns_strict=True):
if dns_strict:
invalid = re.search(r"([^a-z0-9\.-])", bucket, re.UNICODE)
if invalid:
raise S3.Exceptions.ParameterError("Bucket name '%s' contains disallowed character '%s'. The only supported ones are: lowercase us-ascii letters (a-z), digits (0-9), dot (.) and hyphen (-)." % (bucket, invalid.groups()[0]))
else:
invalid = re.search(r"([^A-Za-z0-9\._-])", bucket, re.UNICODE)
if invalid:
raise S3.Exceptions.ParameterError("Bucket name '%s' contains disallowed character '%s'. The only supported ones are: us-ascii letters (a-z, A-Z), digits (0-9), dot (.), hyphen (-) and underscore (_)." % (bucket, invalid.groups()[0]))
if len(bucket) < 3:
raise S3.Exceptions.ParameterError("Bucket name '%s' is too short (min 3 characters)" % bucket)
if len(bucket) > 255:
raise S3.Exceptions.ParameterError("Bucket name '%s' is too long (max 255 characters)" % bucket)
if dns_strict:
if len(bucket) > 63:
raise S3.Exceptions.ParameterError("Bucket name '%s' is too long (max 63 characters)" % bucket)
if re.search(r"-\.", bucket, re.UNICODE):
raise S3.Exceptions.ParameterError("Bucket name '%s' must not contain sequence '-.' for DNS compatibility" % bucket)
if re.search(r"\.\.", bucket, re.UNICODE):
raise S3.Exceptions.ParameterError("Bucket name '%s' must not contain sequence '..' for DNS compatibility" % bucket)
if not re.search(r"^[0-9a-z]", bucket, re.UNICODE):
raise S3.Exceptions.ParameterError("Bucket name '%s' must start with a letter or a digit" % bucket)
if not re.search(r"[0-9a-z]$", bucket, re.UNICODE):
raise S3.Exceptions.ParameterError("Bucket name '%s' must end with a letter or a digit" % bucket)
return True
__all__.append("check_bucket_name")
def check_bucket_name_dns_conformity(bucket):
try:
return check_bucket_name(bucket, dns_strict = True)
except S3.Exceptions.ParameterError:
return False
__all__.append("check_bucket_name_dns_conformity")
def check_bucket_name_dns_support(bucket_host, bucket_name):
"""
Check whether either the host_bucket support buckets and
either bucket name is dns compatible
"""
if "%(bucket)s" not in bucket_host:
return False
return check_bucket_name_dns_conformity(bucket_name)
__all__.append("check_bucket_name_dns_support")
def getBucketFromHostname(hostname):
"""
bucket, success = getBucketFromHostname(hostname)
Only works for hostnames derived from bucket names
using Config.host_bucket pattern.
Returns bucket name and a boolean success flag.
"""
if "%(bucket)s" not in S3.Config.Config().host_bucket:
return (hostname, False)
# Create RE pattern from Config.host_bucket
pattern = S3.Config.Config().host_bucket.lower() % { 'bucket' : '(?P<bucket>.*)' }
m = re.match(pattern, hostname, re.UNICODE)
if not m:
return (hostname, False)
return m.group(1), True
__all__.append("getBucketFromHostname")
def getHostnameFromBucket(bucket):
return S3.Config.Config().host_bucket.lower() % { 'bucket' : bucket }
__all__.append("getHostnameFromBucket")
# Deal with the fact that pwd and grp modules don't exist for Windows
try:
import pwd
def getpwuid_username(uid):
"""returns a username from the password database for the given uid"""
return unicodise_s(pwd.getpwuid(uid).pw_name)
except ImportError:
import getpass
def getpwuid_username(uid):
return unicodise_s(getpass.getuser())
__all__.append("getpwuid_username")
try:
import grp
def getgrgid_grpname(gid):
"""returns a groupname from the group database for the given gid"""
return unicodise_s(grp.getgrgid(gid).gr_name)
except ImportError:
def getgrgid_grpname(gid):
return u"nobody"
__all__.append("getgrgid_grpname")
# vim:et:ts=4:sts=4:ai
........