ddns/__init__.py

   1 #!/usr/bin/python
   2
   3 import logging
   4 import logging.handlers
   5 import ConfigParser
   6
   7 from i18n import _
   8
   9 logger = logging.getLogger("ddns.core")
  10 logger.propagate = 1
  11
  12 from .providers import *
  13 from .system import DDNSSystem
  14
  15 # Setup the logger.
  16 def setup_logging():
  17         rootlogger = logging.getLogger("ddns")
  18         rootlogger.setLevel(logging.DEBUG)
  19
  20         # Setup a logger that logs to syslog.
  21         #handler = logging.handlers.SysLogHandler(address="/dev/log")
  22
  23         handler = logging.StreamHandler()
  24         rootlogger.addHandler(handler)
  25
  26 setup_logging()
  27
  28 class DDNSCore(object):
  29         def __init__(self, debug=False):
  30                 # In debug mode, enable debug logging.
  31                 if debug:
  32                         logger.setLevel(logging.DEBUG)
  33
  34                 # Initialize the settings array.
  35                 self.settings = {}
  36
  37                 # Dict with all providers, that are supported.
  38                 self.providers = {}
  39                 self.register_all_providers()
  40
  41                 # List of configuration entries.
  42                 self.entries = []
  43
  44                 # Add the system class.
  45                 self.system = DDNSSystem(self)
  46
  47         def register_provider(self, provider):
  48                 """
  49                         Registers a new provider.
  50                 """
  51                 assert issubclass(provider, DDNSProvider)
  52
  53                 provider_handle = provider.INFO.get("handle")
  54                 assert provider_handle
  55
  56                 assert not self.providers.has_key(provider_handle), \
  57                         "Provider '%s' has already been registered" % provider_handle
  58
  59                 provider_name = provider.INFO.get("name")
  60                 assert provider_name
  61
  62                 logger.debug("Registered new provider: %s (%s)" % (provider_name, provider_handle))
  63                 self.providers[provider_handle] = provider
  64
  65         def register_all_providers(self):
  66                 """
  67                         Simply registers all providers.
  68                 """
  69                 for provider in (
  70                         DDNSProviderNOIP,
  71                         DDNSProviderSelfhost,
  72                 ):
  73                         self.register_provider(provider)
  74
  75         def load_configuration(self, filename):
  76                 configs = ConfigParser.SafeConfigParser()
  77                 configs.read([filename,])
  78
  79                 # First apply all global configuration settings.
  80                 for k, v in configs.items("config"):
  81                         self.settings[k] = v
  82
  83                 for entry in configs.sections():
  84                         # Skip the special config section.
  85                         if entry == "config":
  86                                 continue
  87
  88                         settings = {}
  89                         for k, v in configs.items(entry):
  90                                 settings[k] = v
  91                         settings["hostname"] = entry
  92
  93                         # Get the name of the provider.
  94                         provider = settings.get("provider", None)
  95                         if not provider:
  96                                 logger.warning("Entry '%s' lacks a provider setting. Skipping." % entry)
  97                                 continue
  98
  99                         # Try to find the provider with the wanted name.
 100                         try:
 101                                 provider = self.providers[provider]
 102                         except KeyError:
 103                                 logger.warning("Could not find provider '%s' for entry '%s'." % (provider, entry))
 104                                 continue
 105
 106                         # Create an instance of the provider object with settings from the
 107                         # configuration file.
 108                         entry = provider(self, **settings)
 109
 110                         # Add new entry to list (if not already exists).
 111                         if not entry in self.entries:
 112                                 self.entries.append(entry)
 113
 114         def updateall(self):
 115                 # If there are no entries, there is nothing to do.
 116                 if not self.entries:
 117                         logger.debug(_("Found no entries in the configuration file. Exiting."))
 118                         return
 119
 120                 # Update them all.
 121                 for entry in self.entries:
 122                         self.update(entry)
 123
 124         def update(self, entry):
 125                 try:
 126                         entry()
 127
 128                 except DDNSUpdateError, e:
 129                         logger.error(_("Dynamic DNS update for %(hostname)s (%(provider)s) failed:") % \
 130                                 { "hostname" : entry.hostname, "provider" : entry.name })
 131                         logger.error("  %s" % e)
 132
 133                 except Exception, e:
 134                         logger.error(_("Dynamic DNS update for %(hostname)s (%(provider)s) throwed an unhandled exception:") % \
 135                                 { "hostname" : entry.hostname, "provider" : entry.name })
 136                         logger.error("  %s" % e)
 137
 138                 logger.info(_("Dynamic DNS update for %(hostname)s (%(provider)s) successful") % \
 139                         { "hostname" : entry.hostname, "provider" : entry.name })