Halberd.util

Package Halberd :: Module util |
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# Source Code for Module Halberd.util

     1  # -*- coding: iso-8859-1 -*-
     2
     3  """Miscellaneous functions.
     4
     5  @var table: Translation table for normalizing strings.
     6  @type table: C{str}
     7  """
     8
     9  # Copyright (C) 2004, 2005, 2006, 2010  Juan M. Bello Rivas <jmbr@superadditive.com>
    10  #
    11  # This program is free software; you can redistribute it and/or modify
    12  # it under the terms of the GNU General Public License as published by
    13  # the Free Software Foundation; either version 2 of the License, or
    14  # (at your option) any later version.
    15  #
    16  # This program is distributed in the hope that it will be useful,
    17  # but WITHOUT ANY WARRANTY; without even the implied warranty of
    18  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    19  # GNU General Public License for more details.
    20  #
    21  # You should have received a copy of the GNU General Public License
    22  # along with this program; if not, write to the Free Software
    23  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    24
    25
    26  import time
    27  import socket
    28  import urlparse
    29
    30
    31  table = '________________________________________________0123456789_______ABCDEFGHIJKLMNOPQRSTUVWXYZ______abcdefghijklmnopqrstuvwxyz_____________________________________________________________________________________________________________________________________'
    32
    33
    34 -def _gen_table():
    35      """Generate translation table.
    36      """
    37      tab = ''
    38      for c in map(chr, xrange(256)):
    39          tab += (c.isalnum() and c) or '_'
    40
    41      return tab
    42
    43
    44 -def utctime():
    45      return time.mktime(time.gmtime())
    46
    47
    48 -def hostname(url):
    49      """Get the hostname part of an URL.
    50
    51      @param url: A valid URL (must be preceded by scheme://).
    52      @type url: C{str}
    53
    54      @return: Hostname corresponding to the URL or the empty string in case of
    55      failure.
    56      @rtype: C{str}
    57      """
    58      netloc = urlparse.urlparse(url)[1]
    59      if netloc == '':
    60          return ''
    61
    62      return netloc.split(':', 1)[0]
    63
    64 -def addresses(host):
    65      """Get the network addresses to which a given host resolves to.
    66
    67      @param host: Hostname we want to resolve.
    68      @type host: C{str}
    69
    70      @return: Network addresses.
    71      @rtype: C{tuple}
    72      """
    73      assert host != ''
    74
    75      try:
    76          name, aliases, addrs = socket.gethostbyname_ex(host)
    77      except socket.error:
    78          return ()
    79
    80      return addrs
    81
    82
    83  if __name__ == '__main__':
    84      print "table = '%s'" % _gen_table()
    85
    86
    87  # vim: ts=4 sw=4 et
    88