Changeset 102

Timestamp:

11/19/07 22:34:45 (1 year ago)

Author:

edsuom

Message:

Module-level function 'parallow' can be exposed to remote PB peers to set instances (of just Parameterized or subclasses, ideally) to let past PB's security gate

Files:

• projects/Twisted-Goodies/trunk/twisted_goodies/pybywire/params.py (modified) (4 diffs)

projects/Twisted-Goodies/trunk/twisted_goodies/pybywire/params.py

@@ -25 +25 @@
-"""
-
-
-spread.jelly import Jellyable, Unjellyable
+, jelly
+python.reflect import namedObject
-
-
-class Parameterized(Jellyable, Unjellyable, object
+def parallow(instances
-    """
+    Call this function with one or more arguments containing standard string
+    representations of L{Parameterized} subclasses, and instances of those will
+    be allowed past PB security. Use judiciously!
+    """
+    for stringRep in instances:
+        cls = namedObject(stringRep)
+        pb.globalSecurity.allowInstancesOf(cls)
+
+
+class Parameterized(jelly.Jellyable, jelly.Unjellyable, object):
+    """
+    @cvar instances: A list of standard string representations of all instances
+      of me or my subclasses. Your remote PB peer should expose L{parallow} to
+      you so you can call it remotely with this list to allow those instances.
+    
-    @cvar keyAttrs: A dict of attributes on which cache keying will be
-      partially based. Any entry having a value of C{None} has no default, and
@@ -40 +55 @@
-
-    """
+    instances = []
-    paramNames, keyAttrs = [], {}
-
@@ -56 +72 @@
-        for name, value in kw.iteritems():
-            setattr(self, name, value)
+        myClass = self.__class__
+        stringRep = "%s.%s" % (myClass.__module__, myClass.__name__)
+        if stringRep not in self.instances:
+            self.instances.append(stringRep)
+            # Make sure you can accept copies of me coming back, too.
+            pb.globalSecurity.allowInstancesOf(myClass)
-
-    def __getattr__(self, name):
@@ -128 +150 @@
-                if hasattr(self, name):
-                    state[name] = getattr(self, name)
-        myClass = self.__class__
-        pb.globalSecurity.allowInstancesOf(myClass)
-        pb.globalSecurity.allowModules(myClass.__module__)
-        return state
-
-
+
+