Changeset 9252414 for fedd/federation

Timestamp:

Dec 3, 2010 11:20:14 AM (14 years ago)

Author:

Ted Faber <faber@…>

Branches:

axis_example, compt_changes, info-ops, master

Children:

a6a3f93

Parents:

262328f

Message:

Add helper for access controlers to extract topology.

Fixes #5

File:

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

fedd/federation/topdl.py

@@ -740 +740 @@
 
     return Topology(**p.current[top])
+
+def topology_from_startsegment(req):
+    """
+    Generate a topology from a StartSegment request to an access controller.
+    This is a little helper to avoid some gross looking syntax.  It accepts
+    either a request enclosed in the StartSegmentRequestBody, or one with that
+    outer dict removed.
+    """
+
+    if 'StartSegmentRequestBody' in req: r = req['StartSegmentRequestBody']
+    else: r = req
+    
+    if 'segmentdescription' in r and \
+            'topdldescription' in r['segmentdescription']:
+        return Topology(**r['segmentdescription']['topdldescription'])
+    else:
+        return None
 
 def topology_to_xml(t, top=None):