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""" 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.*)' } 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