1 # XMLRPC-specific code for SFA Client
4 #from sfa.util.httpsProtocol import HTTPS, HTTPSConnection
5 from httplib import HTTPS, HTTPSConnection
6 from sfa.util.sfalogging import logger
8 # ServerException, ExceptionUnmarshaller
10 # Used to convert server exception strings back to an exception.
11 # from usenet, Raghuram Devarakonda
13 class ServerException(Exception):
16 class ExceptionUnmarshaller(xmlrpclib.Unmarshaller):
19 return xmlrpclib.Unmarshaller.close(self)
20 except xmlrpclib.Fault, e:
21 raise ServerException(e.faultString)
26 # A transport for XMLRPC that works on top of HTTPS
28 # python 2.7 xmlrpclib has changed its internal code
29 # it now calls 'getresponse' on the obj returned by make_connection
30 # while it used to call 'getreply'
31 # regardless of the version, httplib.HTTPS does implement getreply,
32 # while httplib.HTTPSConnection has getresponse
33 # so we create a dummy instance to check what's expected
34 need_HTTPSConnection=hasattr(xmlrpclib.Transport().make_connection('localhost'),'getresponse')
36 class XMLRPCTransport(xmlrpclib.Transport):
38 def __init__(self, key_file=None, cert_file=None, timeout=None):
39 xmlrpclib.Transport.__init__(self)
41 self.key_file = key_file
42 self.cert_file = cert_file
44 def make_connection(self, host):
45 # create a HTTPS connection object from a host descriptor
46 # host may be a string, or a (host, x509-dict) tuple
47 host, extra_headers, x509 = self.get_host_info(host)
48 if need_HTTPSConnection:
49 conn = HTTPSConnection(host, None, key_file=self.key_file, cert_file=self.cert_file, timeout=self.timeout) #**(x509 or {}))
52 conn = HTTPS(host, None, key_file=self.key_file, cert_file=self.cert_file, timeout=self.timeout) #**(x509 or {}))
54 # some versions don't have a timeout argument
55 conn = HTTPS(host, None, key_file=self.key_file, cert_file=self.cert_file) #**(x509 or {}))
57 if hasattr(conn, 'set_timeout'):
58 conn.set_timeout(self.timeout)
60 # Some logic to deal with timeouts. It appears that some (or all) versions
61 # of python don't set the timeout after the socket is created. We'll do it
62 # ourselves by forcing the connection to connect, finding the socket, and
63 # calling settimeout() on it. (tested with python 2.6)
65 if hasattr(conn, "_conn"):
66 # HTTPS is a wrapper around HTTPSConnection
67 real_conn = conn._conn
71 if hasattr(real_conn, "sock") and hasattr(real_conn.sock, "settimeout"):
72 real_conn.sock.settimeout(self.timeout)
77 unmarshaller = ExceptionUnmarshaller()
78 parser = xmlrpclib.ExpatParser(unmarshaller)
79 return parser, unmarshaller
81 class XMLRPCServerProxy(xmlrpclib.ServerProxy):
82 def __init__(self, url, transport, allow_none=True, verbose=False):
83 # remember url for GetVersion
85 xmlrpclib.ServerProxy.__init__(self, url, transport, allow_none=allow_none, verbose=verbose)
87 def __getattr__(self, attr):
88 logger.debug ("xml-rpc %s method:%s"%(self.url,attr))
89 return xmlrpclib.ServerProxy.__getattr__(self, attr)
91 def get_server(url, key_file, cert_file, timeout=None, verbose=False):
92 transport = XMLRPCTransport(key_file, cert_file, timeout)
93 return XMLRPCServerProxy(url, transport, allow_none=True, verbose=verbose)