# Mark Huang <mlhuang@cs.princeton.edu>
# Copyright (C) 2006 The Trustees of Princeton University
#
-# $Id: Method.py,v 1.7 2006/10/18 19:42:46 tmack Exp $
-#
-
import xmlrpclib
from types import *
import textwrap
import os
import time
+import pprint
+from types import StringTypes
+from PLC.NovaShell import NovaShell
from PLC.Faults import *
-from PLC.Parameter import Parameter, Mixed
+from PLC.Parameter import Parameter, Mixed, python_type, xmlrpc_type
from PLC.Auth import Auth
-from PLC.Debug import profile, log
+from PLC.Timestamp import Timestamp
+from PLC.Debug import profile
+from PLC.Nodes import Node, Nodes
+from PLC.Persons import Person, Persons
-class Method:
+# we inherit object because we use new-style classes for legacy methods
+class Method (object):
"""
Base class for all PLCAPI functions. At a minimum, all PLCAPI
functions must define:
dictionaries of possibly mixed types, values, and/or Parameters
(e.g., [int, bool, ...] or {'arg1': int, 'arg2': bool}).
+w
+w
Once function decorators in Python 2.4 are fully supported,
consider wrapping calls with accepts() and returns() functions
instead of performing type checking manually.
return True
- def __init__(self, api):
+ def __init__(self, api,caller=None):
self.name = self.__class__.__name__
self.api = api
+ self.api.client_shell = None
- # Auth may set this to a Person instance (if an anonymous
- # method, will remain None).
- self.caller = None
+ if caller:
+ # let a method call another one by propagating its caller
+ self.caller=caller
+ else:
+ # Auth may set this to a Person instance (if an anonymous
+ # method, will remain None).
+ self.caller = None
+
# API may set this to a (addr, port) tuple if known
self.source = None
-
def __call__(self, *args, **kwds):
"""
Main entry point for all PLCAPI functions. Type checks
"""
try:
- start = time.time()
- (min_args, max_args, defaults) = self.args()
-
- # Check that the right number of arguments were passed in
- if len(args) < len(min_args) or len(args) > len(max_args):
- raise PLCInvalidArgumentCount(len(args), len(min_args), len(max_args))
-
- for name, value, expected in zip(max_args, args, self.accepts):
- self.type_check(name, value, expected)
-
- # The first argument to all methods that require
- # authentication, should be an Auth structure. The rest of the
- # arguments to the call may also be used in the authentication
- # check. For example, calls made by the Boot Manager are
- # verified by comparing a hash of the message parameters to
- # the value in the authentication structure.
-
- if len(self.accepts):
- auth = None
- if isinstance(self.accepts[0], Auth):
- auth = self.accepts[0]
- elif isinstance(self.accepts[0], Mixed):
- for auth in self.accepts[0]:
- if isinstance(auth, Auth):
- break
- if isinstance(auth, Auth):
- auth.check(self, *args)
-
- result = self.call(*args, **kwds)
- runtime = time.time() - start
-
- if self.api.config.PLC_API_DEBUG:
- self.log(0, runtime, *args)
-
- return result
+ start = time.time()
+
+ # legacy code cannot be type-checked, due to the way Method.args() works
+ # as of 5.0-rc16 we don't use skip_type_check anymore
+ if not hasattr(self,"skip_type_check"):
+ (min_args, max_args, defaults) = self.args()
+
+ # Check that the right number of arguments were passed in
+ if len(args) < len(min_args) or len(args) > len(max_args):
+ raise PLCInvalidArgumentCount(len(args), len(min_args), len(max_args))
+
+ for name, value, expected in zip(max_args, args, self.accepts):
+ self.type_check(name, value, expected, args)
+
+ result = self.call(*args, **kwds)
+ runtime = time.time() - start
+
+ return result
except PLCFault, fault:
- # Prepend method name to expected faults
- fault.faultString = self.name + ": " + fault.faultString
- runtime = time.time() - start
- self.log(fault.faultCode, runtime, *args)
- raise fault
+ caller = ""
+ if self.caller:
+ caller = 'user: %s' % self.caller.name
- def log(self, fault_code, runtime, *args):
- """
- Log the transaction
- """
- # Gather necessary logging variables
- event_type = 'Unknown'
- object_type = 'Unknown'
- person_id = 'Null'
- object_ids = []
- call_name = self.name
- call_args = ", ".join([unicode(arg) for arg in list(args)[1:]])
- call = "%s(%s)" % (call_name, call_args)
-
- if hasattr(self, 'event_type'):
- event_type = self.event_type
- if hasattr(self, 'object_type'):
- object_type = self.object_type
- if self.caller:
- person_id = self.caller['person_id']
- if hasattr(self, 'object_ids'):
- object_ids = self.object_ids
-
- # do not log system calls
- if call_name.startswith('system'):
- return False
- # do not log get calls
- if call_name.startswith('Get'):
- return False
-
- sql_event = "INSERT INTO events " \
- " (person_id, event_type, object_type, fault_code, call, runtime) VALUES" \
- " (%(person_id)s, '%(event_type)s', '%(object_type)s'," \
- " %(fault_code)d, '%(call)s', %(runtime)f)"
- self.api.db.do(sql_event % locals())
-
- print self.api.db.last_insert_id('events', 'event_id')
- # log objects affected
- for object_id in object_ids:
- event_id = self.api.db.last_insert_id('events', 'event_id')
- sql_objects = "INSERT INTO event_object (event_id, object_id) VALUES" \
- " (%(event_id)d, %(object_id)d) " % (locals())
- self.api.db.do(sql_objects)
-
- self.api.db.commit()
-
+ # Prepend caller and method name to expected faults
+ fault.faultString = caller + ": " + self.name + ": " + fault.faultString
+ raise fault
def help(self, indent = " "):
"""
elif isinstance(param, Mixed):
for subparam in param:
text += param_text(name, subparam, indent + step, step)
- elif isinstance(param, (list, tuple)):
+ elif isinstance(param, (list, tuple, set)):
for subparam in param:
text += param_text("", subparam, indent + step, step)
min_args = max_args[0:len(max_args) - len(defaults)]
defaults = tuple([None for arg in min_args]) + defaults
-
+
return (min_args, max_args, defaults)
- def type_check(self, name, value, expected, min = None, max = None):
+ def type_check(self, name, value, expected, args):
"""
Checks the type of the named value against the expected type,
which may be a Python type, a typed value, a Parameter, a
Mixed type, or a list or dictionary of possibly mixed types,
values, Parameters, or Mixed types.
-
+
Extraneous members of lists must be of the same type as the
last specified type. For example, if the expected argument
type is [int, bool], then [1, False] and [14, True, False,
if isinstance(expected, Mixed):
for item in expected:
try:
- self.type_check(name, value, item)
- expected = item
- break
+ self.type_check(name, value, item, args)
+ return
except PLCInvalidArgument, fault:
pass
- if expected != item:
- xmlrpc_types = [xmlrpc_type(item) for item in expected]
- raise PLCInvalidArgument("expected %s, got %s" % \
- (" or ".join(xmlrpc_types),
- xmlrpc_type(type(value))),
- name)
+ raise fault
+
+ # If an authentication structure is expected, save it and
+ # authenticate after basic type checking is done.
+ if isinstance(expected, Auth):
+ auth = expected
+ else:
+ auth = None
# Get actual expected type from within the Parameter structure
- elif isinstance(expected, Parameter):
+ if isinstance(expected, Parameter):
min = expected.min
max = expected.max
+ nullok = expected.nullok
expected = expected.type
+ else:
+ min = None
+ max = None
+ nullok = False
expected_type = python_type(expected)
+ # If value can be NULL
+ if value is None and nullok:
+ return
+
# Strings are a special case. Accept either unicode or str
# types if a string is expected.
if expected_type in StringTypes and isinstance(value, StringTypes):
if max is not None and \
len(value.encode(self.api.encoding)) > max:
raise PLCInvalidArgument, "%s must be at most %d bytes long" % (name, max)
+ elif expected_type in (list, tuple, set):
+ if min is not None and len(value) < min:
+ raise PLCInvalidArgument, "%s must contain at least %d items" % (name, min)
+ if max is not None and len(value) > max:
+ raise PLCInvalidArgument, "%s must contain at most %d items" % (name, max)
else:
if min is not None and value < min:
raise PLCInvalidArgument, "%s must be > %s" % (name, str(min))
raise PLCInvalidArgument, "%s must be < %s" % (name, str(max))
# If a list with particular types of items is expected
- if isinstance(expected, (list, tuple)):
+ if isinstance(expected, (list, tuple, set)):
for i in range(len(value)):
if i >= len(expected):
- i = len(expected) - 1
- self.type_check(name + "[]", value[i], expected[i])
+ j = len(expected) - 1
+ else:
+ j = i
+ self.type_check(name + "[]", value[i], expected[j], args)
# If a struct with particular (or required) types of items is
# expected.
elif isinstance(expected, dict):
for key in value.keys():
if key in expected:
- self.type_check(name + "['%s']" % key, value[key], expected[key])
+ self.type_check(name + "['%s']" % key, value[key], expected[key], args)
for key, subparam in expected.iteritems():
if isinstance(subparam, Parameter) and \
+ subparam.optional is not None and \
not subparam.optional and key not in value.keys():
raise PLCInvalidArgument("'%s' not specified" % key, name)
-def python_type(arg):
- """
- Returns the Python type of the specified argument, which may be a
- Python type, a typed value, or a Parameter.
- """
-
- if isinstance(arg, Parameter):
- arg = arg.type
+ if auth is not None:
+ # assume auth structure is first argument
+ self.authenticate(args[0])
+
+ def authenticate(self, auth):
+
+ # establish nova connection
+ self.api.client_shell = NovaShell(username=auth['Username'],
+ password=auth['AuthString'],
+ tenant=auth['Tenant'])
+ self.api.client_shell.authenticate()
+ persons = Persons(self.api, {'email': auth['Username']})
+ if not persons:
+ raise PLCAuthenticationFailure, "Username not found"
+ self.caller = persons[0]
+ keystone_user = self.api.client_shell.keystone.users.find(id=self.caller['keystone_id'])
+ self.caller_tenant = self.api.client_shell.keystone.tenants.find(name=auth['Tenant'])
+ caller_roles = self.api.client_shell.keystone.roles.roles_for_user(self.caller, self.caller_tenant)
+ role_names = [role.name for role in caller_roles]
+ self.caller['roles'] = role_names
+ if not set(role_names).intersection(self.roles):
+ method_message="method %s has roles [%s]"%(self.name,','.join(self.roles))
+ person_message="caller %s has roles [%s]"%(self.caller.name,','.join(role_names))
+ raise PLCAuthenticationFailure, "PasswordAuth: missing role, %s -- %s"%(method_message,person_message)
- if isinstance(arg, type):
- return arg
- else:
- return type(arg)
-
-def xmlrpc_type(arg):
- """
- Returns the XML-RPC type of the specified argument, which may be a
- Python type, a typed value, or a Parameter.
- """
- arg_type = python_type(arg)
-
- if arg_type == NoneType:
- return "nil"
- elif arg_type == IntType or arg_type == LongType:
- return "int"
- elif arg_type == bool:
- return "boolean"
- elif arg_type == FloatType:
- return "double"
- elif arg_type in StringTypes:
- return "string"
- elif arg_type == ListType or arg_type == TupleType:
- return "array"
- elif arg_type == DictType:
- return "struct"
- elif arg_type == Mixed:
- # Not really an XML-RPC type but return "mixed" for
- # documentation purposes.
- return "mixed"
- else:
- raise PLCAPIError, "XML-RPC cannot marshal %s objects" % arg_type
git://git.onelab.eu / plcapi.git / blobdiff