manifoldapi/manifoldapi.py

   1 # Manifold API Python interface
   2 import copy
   3 import xmlrpclib
   4 import ssl
   5
   6 from django.contrib import messages
   7 from django.shortcuts import redirect
   8
   9 from manifold.core.result_value import ResultValue
  10 from manifoldresult import ManifoldResult, ManifoldCode, ManifoldException, truncate_result
  11
  12 # from unfold.sessioncache import SessionCache
  13
  14 from myslice.settings import config, logger
  15
  16 class ManifoldAPI:
  17
  18     def __init__(self, auth=None, cainfo=None):
  19
  20         self.auth = auth
  21         self.cainfo = cainfo
  22         self.errors = []
  23         self.trace = []
  24         self.calls = {}
  25         self.multicall = False
  26         self.url = config.manifold_url()
  27
  28         # Manifold uses a self signed certificate
  29         # https://www.python.org/dev/peps/pep-0476/
  30         try:    turn_off_server_verify = { 'context' : ssl._create_unverified_context() }
  31         except: turn_off_server_verify = {}
  32         self.server = xmlrpclib.Server(self.url, verbose=False, allow_none=True,
  33                                        **turn_off_server_verify)
  34
  35     # xxx temporary code for scaffolding a ManifolResult on top of an API that does not expose error info
  36     # as of march 2013 we work with an API that essentially either returns the value, or raises
  37     # an xmlrpclib.Fault exception with always the same 8002 code
  38     # since most of the time we're getting this kind of issues for expired sessions
  39     # (looks like sessions are rather short-lived), for now the choice is to map these errors on
  40     # a SESSION_EXPIRED code
  41     def __getattr__(self, methodName):
  42
  43         def func(*args, **kwds):
  44             import time
  45             start = time.time()
  46
  47             # the message to display
  48             auth_message = "<AuthMethod not set in {}>".format(self.auth) if 'AuthMethod' not in self.auth \
  49                            else "[session]" if self.auth['AuthMethod'] == 'session' \
  50                            else "user:{}".format(self.auth['Username']) if self.auth['AuthMethod'] == 'password' \
  51                            else "anonymous" if self.auth['AuthMethod'] == 'anonymous' \
  52                            else "[???]" + "{}".format(self.auth)
  53             end_message = "MANIFOLD <- {}( {}( {} ) ) with auth={} to {}"\
  54                           .format(methodName,
  55                                   args[0]['action'] or '',
  56                                   args[0]['object'] or '',
  57                                   auth_message,
  58                                   self.url)
  59             try:
  60                 args += ({ 'authentication': self.auth },)
  61                 result = getattr(self.server, methodName)(*args, **kwds)
  62                 logger.debug("{} executed in {} seconds -> {}"\
  63                              .format(end_message, time.time() - start, truncate_result(result)))
  64                 return ResultValue(**result)
  65
  66             except Exception as error:
  67                 logger.error("===== xmlrpc catch-all exception: {}".format(error))
  68                 import traceback
  69                 logger.error(traceback.format_exc(limit=3))
  70
  71                 if "Connection refused" in error:
  72                     raise ManifoldException ( ManifoldResult (code=ManifoldCode.SERVER_UNREACHABLE,
  73                                                               output="{} answered {}".format(self.url, error)))
  74                 # otherwise
  75                 logger.error("{} FAILED - executed in {} seconds"\
  76                              .format(end_message, time.time() - start))
  77                 logger.error("MANIFOLD {}".format(error))
  78                 raise ManifoldException ( ManifoldResult (code = ManifoldCode.SERVER_UNREACHABLE,
  79                                                           output = "{}".format(error)))
  80
  81         return func
  82
  83 def _execute_query(request, query, manifold_api_session_auth):
  84
  85     manifold_api = ManifoldAPI(auth = manifold_api_session_auth)
  86
  87     logger.debug("MANIFOLD -> QUERY : {}".format(" ".join(str(query).split())))
  88     result = manifold_api.forward(query.to_dict())
  89     if result['code'] == 2:
  90         # this is gross; at the very least we need to logout()
  91         # but most importantly there is a need to refine that test, since
  92         # code==2 does not necessarily mean an expired session
  93         # XXX only if we know it is the issue
  94         #SessionCache().end_session(request)
  95         # Flush django session
  96         del request.session['manifold']
  97
  98         request.session.flush()
  99         #raise Exception, 'Error running query: {}'.format(result)
 100
 101     if result['code'] == 1:
 102         logger.warning("MANIFOLD : {}".format(result['description']))
 103
 104     # XXX Handle errors
 105     #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}
 106
 107     return result['value']
 108
 109 def execute_query(request, query):
 110
 111     logger.debug("EXECUTE QUERY: request - {}".format(request.session.items()))
 112
 113     if not 'manifold' in request.session or not 'auth' in request.session['manifold']:
 114     #manifold_api_session_auth = SessionCache().get_auth(request)
 115     #if not manifold_api_session_auth:
 116         request.session.flush()
 117         #raise Exception, "User not authenticated"
 118         host = request.get_host()
 119         return redirect('/')
 120
 121     manifold_api_session_auth = request.session['manifold']['auth']
 122
 123     return _execute_query(request, query, manifold_api_session_auth)
 124
 125 def execute_admin_query(request, query):
 126     admin_user, admin_password = config.manifold_admin_user_password()
 127     if not admin_user or not admin_password:
 128         logger.error("""CONFIG: you need to setup admin_user and admin_password in myslice.ini
 129 Some functions won't work properly until you do so""")
 130     admin_auth = {'AuthMethod': 'password', 'Username': admin_user, 'AuthString': admin_password}
 131     return _execute_query(request, query, admin_auth)