# Manifold API Python interface import copy, xmlrpclib from myslice.configengine import ConfigEngine from django.contrib import messages from manifoldresult import ManifoldResult, ManifoldCode, ManifoldException from manifold.core.result_value import ResultValue debug=False debug=True debug_deep=False #debug_deep=True ########## ugly stuff for hopefully nicer debug messages def mytruncate (obj, l): # we will add '..' l1=l-2 repr="%s"%obj return (repr[:l1]+'..') if len(repr)>l1 else repr from time import time, gmtime, strftime from math import trunc def mytime (start=None): gm=gmtime() t=time() msg=strftime("%H:%M:%S-", gmtime())+"%03d"%((t-trunc(t))*1000) if start is not None: msg += " (%03fs)"%(t-start) return t,msg ########## class ManifoldAPI: def __init__ (self, auth=None, cainfo=None): self.auth = auth self.cainfo = cainfo self.errors = [] self.trace = [] self.calls = {} self.multicall = False self.url = ConfigEngine().manifold_url() self.server = xmlrpclib.Server(self.url, verbose=False, allow_none=True) def __repr__ (self): return "ManifoldAPI[%s]"%self.url def _print_value (self, value): print "+++",'value', if isinstance (value,list): print "[%d]"%len(value), elif isinstance (value,dict): print "{%d}"%len(value), print mytruncate (value,80) # a one-liner to give a hint of what the return value looks like def _print_result (self, result): if not result: print "[no/empty result]" elif isinstance (result,str): print "result is '%s'"%result elif isinstance (result,list): print "result is a %d-elts list"%len(result) elif isinstance (result,dict): print "result is a dict with %d keys : %s"%(len(result),result.keys()) for (k,v) in result.iteritems(): if v is None: continue if k=='value': self._print_value(v) else: print '+++',k,':',mytruncate (v,30) else: print "[dont know how to display result] %s"%result # how to display a call def _repr_query (self,methodName, query): try: action=query['action'] except: action="???" try: subject=query['object'] except: subject="???" # most of the time, we run 'forward' if methodName=='forward': return "forward(%s(%s))"%(action,subject) else: return "%s(%s)"%(action,subject) # xxx temporary code for scaffolding a ManifolResult on top of an API that does not expose error info # as of march 2013 we work with an API that essentially either returns the value, or raises # an xmlrpclib.Fault exception with always the same 8002 code # since most of the time we're getting this kind of issues for expired sessions # (looks like sessions are rather short-lived), for now the choice is to map these errors on # a SESSION_EXPIRED code def __getattr__(self, methodName): def func(*args, **kwds): # shorthand def repr(): return self._repr_query (methodName, args[0]) try: if debug: start,msg = mytime() print "====>",msg,"ManifoldAPI.%s"%repr(),"url",self.url # No password in the logs logAuth = copy.copy(self.auth) for obfuscate in ['Authring','session']: if obfuscate in logAuth: logAuth[obfuscate]="XXX" if debug_deep: print "=> auth",logAuth if debug_deep: print "=> args",args,"kwds",kwds annotations = { 'authentication': self.auth } args += (annotations,) result=getattr(self.server, methodName)(*args, **kwds) print "%s%r" %(methodName, args) if debug: print '<= result=', self._print_result(result) end,msg = mytime(start) print "<====",msg,"backend call %s returned"%(repr()) return ResultValue(**result) except Exception,error: print "** MANIFOLD API ERROR **" if debug: print "===== xmlrpc catch-all exception:",error import traceback traceback.print_exc(limit=3) if "Connection refused" in error: raise ManifoldException ( ManifoldResult (code=ManifoldCode.SERVER_UNREACHABLE, output="%s answered %s"%(self.url,error))) # otherwise print "<==== ERROR On ManifoldAPI.%s"%repr() raise ManifoldException ( ManifoldResult (code=ManifoldCode.SERVER_UNREACHABLE, output="%s"%error) ) return func def _execute_query(request, query, manifold_api_session_auth): manifold_api = ManifoldAPI(auth=manifold_api_session_auth) print "-"*80 print query print query.to_dict() print "-"*80 result = manifold_api.forward(query.to_dict()) if result['code'] == 2: # this is gross; at the very least we need to logout() # but most importantly there is a need to refine that test, since # code==2 does not necessarily mean an expired session # XXX only if we know it is the issue del request.session['manifold'] # Flush django session request.session.flush() #raise Exception, 'Error running query: %r' % result if result['code'] == 1: print "WARNING" print result['description'] # XXX Handle errors #Error running query: {'origin': [0, 'XMLRPCAPI'], 'code': 2, 'description': 'No such session: No row was found for one()', 'traceback': 'Traceback (most recent call last):\n File "/usr/local/lib/python2.7/dist-packages/manifold/core/xmlrpc_api.py", line 68, in xmlrpc_forward\n user = Auth(auth).check()\n File "/usr/local/lib/python2.7/dist-packages/manifold/auth/__init__.py", line 245, in check\n return self.auth_method.check()\n File "/usr/local/lib/python2.7/dist-packages/manifold/auth/__init__.py", line 95, in check\n raise AuthenticationFailure, "No such session: %s" % e\nAuthenticationFailure: No such session: No row was found for one()\n', 'type': 2, 'ts': None, 'value': None} return result['value'] def execute_query(request, query): if not 'manifold' in request.session or not 'auth' in request.session['manifold']: request.session.flush() raise Exception, "User not authenticated" manifold_api_session_auth = request.session['manifold']['auth'] return _execute_query(request, query, manifold_api_session_auth) def execute_admin_query(request, query): admin_user, admin_password = ConfigEngine().manifold_admin_user_password() admin_auth = {'AuthMethod': 'password', 'Username': admin_user, 'AuthString': admin_password} return _execute_query(request, query, admin_auth)