1 # Manifold API Python interface
4 from myslice.config import Config
6 from manifoldresult import ManifoldResult, ManifoldCode
13 def __init__(self, auth=None, cainfo=None):
21 self.multicall = False
22 self.url = config.manifold_url
23 self.server = xmlrpclib.Server(self.url, verbose=False, allow_none=True)
25 def __repr__ (self): return "ManifoldAPI[%s]"%self.url
27 # xxx temporary code for scaffolding a ManifolResult on top of an API that does not expose error info
28 # as of march 2013 we work with an API that essentially either returns the value, or raises
29 # an xmlrpclib.Fault exception with always the same 8002 code
30 # since most of the time we're getting this kind of issues for expired sessions
31 # (looks like sessions are rather short-lived), for now the choice is to map these errors on
32 # a SESSION_EXPIRED code
33 def __getattr__(self, methodName):
34 def func(*args, **kwds):
36 print "entering ManifoldAPI.%s"%methodName,
40 result=getattr(self.server, methodName)(self.auth, *args, **kwds)
41 ### attempt to cope with old APIs and new APIs
42 if isinstance (result, dict) and 'code' in result:
43 # this sounds like a result from a new API, leave it untouched
44 # XXX jordan : we need to wrap it into a ResultValue structure
45 # XXX this is not good until we merge both repos
46 if result['code'] != 2:
47 return ManifoldResult(code=result['code'], value=result['value'])
49 return ManifoldResult(code=result['code'], output=result['description'])
52 print '<=== backend call', methodName, args, kwds
53 print '.... ctd', 'Authmethod=',self.auth['AuthMethod'], self.url,'->',
54 if not result: print "[no/empty result]"
55 elif isinstance (result,str): print "result is '%s'"%result
56 elif isinstance (result,list): print "result is a %d-elts list"%len(result)
57 else: print "[dont know how to display result]"
58 return ManifoldResult (code=ManifoldCode.SUCCESS, value=result)
59 except xmlrpclib.Fault, error:
60 ### xxx this is very rough for now
61 # until we have some agreement about how the API calls should return error conditions
62 # in some less unpolite way than this anonymous exception, we assume it's a problem with the session
63 # that needs to be refreshed
64 if error.faultCode == 8002:
65 reason="most likely your session has expired"
66 reason += " (the manifold API has no unambiguous error reporting mechanism yet)"
67 return ManifoldResult (code=ManifoldCode.SESSION_EXPIRED, output=reason)
69 reason="xmlrpclib.Fault with faultCode = %s (not taken as session expired)"%error.faultCode
70 return ManifoldResult (code=ManifoldCode.UNKNOWN_ERROR, output=reason)
71 except Exception,error:
72 print "ManifoldAPI: unexpected exception",error
73 return ManifoldResult (code=ManifoldCode.UNKNOWN_ERROR, output="%s"%error)
76 def send_manifold_query (self, query):
77 # We use a dictionary representation of the query for forwarding it to the API
78 ret = self.forward(query.to_dict())
86 #old# (action,subject)= (query.action,query.subject)
87 #old# # use e.g. self.Get rather than self.server.Get so we use the __getattr__ code
88 #old# if action=='get':
89 #old## this makes the backend to squeak and one can't login anymore...
90 #old## return self.Get(subject, query.filters, query.timestamp, query.fields)
91 #old# return self.Get(subject, query.filters, {}, query.fields)
92 #old# elif action=='update':
93 #old# answer=self.Update(subject, query.filters, query.params, query.fields)
94 #old# if not isinstance (answer, ManifoldResult): print "UNEXECPECTED answer", answer
97 #old# warning="WARNING: ManifoldAPI.send_manifold_query: %s not implemented for now"%action
100 #old# return ManifoldResult(code=ManifoldCode.NOT_IMPLEMENTED, output=warning)