Changeset 6e63513 for fedd/federation/access.py

Timestamp:

Nov 23, 2010 6:42:19 PM (13 years ago)

Author:

Ted Faber <faber@…>

Branches:

axis_example, compt_changes, info-ops, master

Children:

25f66c3

Parents:

353db8c

Message:

Checkpoint

File:

• fedd/federation/access.py (modified) (1 diff)

fedd/federation/access.py

@@ -194 +194 @@
         finally:
             if f: f.close()
+
+    def read_abac_access(self, fn, access_obj=None):
+        """
+        Read an access DB of the form
+            abac.attribute -> local_auth_data
+        The access dict is filled with mappings from the abac attributes (as
+        strings) to the access objects.  The objects are strings by default,
+        but the class constructor is called with the string following the ->
+        and whitespace in the file.
+        """
+
+        map_re = re.compile("(\S+)\s+->\s+(.*)");
+        if access_obj is None:
+            access_obj = lambda(x): "%s" % x
+
+        f = open(fn, 'r')
+        try:
+            lineno = 0
+            for line in f:
+                lineno += 1
+                line = line.strip();
+                if len(line) == 0 or line.startswith('#'):
+                    continue
+                m = map_re.match(line)
+                if m != None:
+                    self.access[m.group(1)] = access_obj(m.group(2))
+                    continue
+
+                # Nothing matched to here: unknown line - raise exception
+                # (finally will close f)
+                raise self.parse_error(
+                        "Unknown statement at line %d of %s" % \
+                        (lineno, fn))
+        finally:
+            if f: f.close()
+
 
     def get_users(self, obj):