sfa/util/xmlrpcprotocol.py

   1 # XMLRPC-specific code for SFA Client
   2
   3 import xmlrpclib
   4
   5 ##
   6 # ServerException, ExceptionUnmarshaller
   7 #
   8 # Used to convert server exception strings back to an exception.
   9 #    from usenet, Raghuram Devarakonda
  10
  11 class ServerException(Exception):
  12     pass
  13
  14 class ExceptionUnmarshaller(xmlrpclib.Unmarshaller):
  15     def close(self):
  16         try:
  17             return xmlrpclib.Unmarshaller.close(self)
  18         except xmlrpclib.Fault, e:
  19             raise ServerException(e.faultString)
  20
  21 ##
  22 # XMLRPCTransport
  23 #
  24 # A transport for XMLRPC that works on top of HTTPS
  25
  26 class XMLRPCTransport(xmlrpclib.Transport):
  27     key_file = None
  28     cert_file = None
  29     def make_connection(self, host):
  30         # create a HTTPS connection object from a host descriptor
  31         # host may be a string, or a (host, x509-dict) tuple
  32         import httplib
  33         host, extra_headers, x509 = self.get_host_info(host)
  34         try:
  35             HTTPS = httplib.HTTPS()
  36         except AttributeError:
  37             raise NotImplementedError(
  38                 "your version of httplib doesn't support HTTPS"
  39                 )
  40         else:
  41             return httplib.HTTPS(host, None, key_file=self.key_file, cert_file=self.cert_file) #**(x509 or {}))
  42
  43     def getparser(self):
  44         unmarshaller = ExceptionUnmarshaller()
  45         parser = xmlrpclib.ExpatParser(unmarshaller)
  46         return parser, unmarshaller
  47
  48 class XMLRPCServerProxy(xmlrpclib.ServerProxy):
  49     def __init__(self, url, transport, allow_none=True, options=None):
  50         self.options = options
  51         verbose = False
  52         if self.options and self.options.debug:
  53             verbose = True
  54         xmlrpclib.ServerProxy.__init__(self, url, transport, allow_none=allow_none, verbose=verbose)
  55
  56     def __getattr__(self, attr):
  57         if self.options.verbose:
  58             print "Calling xml-rpc method:", attr
  59         return xmlrpclib.ServerProxy.__getattr__(self, attr)
  60
  61
  62 def get_server(url, key_file, cert_file, options=None):
  63     transport = XMLRPCTransport()
  64     transport.key_file = key_file
  65     transport.cert_file = cert_file
  66
  67     return XMLRPCServerProxy(url, transport, allow_none=True, options=options)
  68