exception handling shows the error

[myslice.git] / manifold / manifoldproxy.py

diff --git a/manifold/manifoldproxy.py b/manifold/manifoldproxy.py
index 99057f4..9f01497 100644 (file)
--- a/manifold/manifoldproxy.py
+++ b/manifold/manifoldproxy.py
@@ -3,8 +3,11 @@ import json
 #from django.core import serializers
 from django.http import HttpResponse, HttpResponseForbidden
 
-from manifold.manifoldquery import ManifoldQuery
+#from manifold.manifoldquery import ManifoldQuery
+from manifold.core.query import Query
+from manifold.core.result_value import ResultValue
 from manifold.manifoldapi import ManifoldAPI
+from manifold.manifoldresult import ManifoldException
 
 debug=False
 debug=True
@@ -13,6 +16,16 @@ debug=True
 debug_spin=0
 #debug_spin=1
 
+# pretend the server only returns - empty lists to 'get' requests - this is to mimick 
+# misconfigurations or expired credentials or similar corner case situations
+debug_empty=False
+#debug_empty=True
+
+# turn this on if you want the fastest possible (locally cached) feedback
+# beware that this is very rough though...
+work_offline=False
+#work_offline=True
+
 # this view is what the javascript talks to when it sends a query
 # see also
 # myslice/urls.py
@@ -31,25 +44,71 @@ with the query passed using POST"""
     # format_in : how is the query encoded in POST
     # format_out: how to serve the results
     if format != 'json':
-        print "manifoldproxy.api: unexpected format %s -- exiting"%format
+        print "manifoldproxy.proxy: unexpected format %s -- exiting"%format
         return
     try:
         # translate incoming POST request into a query object
         if debug: print 'manifoldproxy.proxy: request.POST',request.POST
-        manifold_query = ManifoldQuery()
+        manifold_query = Query()
+        #manifold_query = ManifoldQuery()
         manifold_query.fill_from_POST(request.POST)
+        offline_filename="offline-%s-%s.json"%(manifold_query.action,manifold_query.object)
         # retrieve session for request
-        manifold_api_session_auth = request.session['manifold']['auth']
+
+        # We allow some requests to use the ADMIN user account
+        if (manifold_query.get_from() == 'local:user' and manifold_query.get_action() == 'create') or (manifold_query.get_from() == 'local:platform' and manifold_query.get_action() == 'get'):
+            print "W: Used hardcoded demo account for admin queries"
+            manifold_api_session_auth = {'AuthMethod': 'password', 'Username': 'demo', 'AuthString': 'demo'}
+        else:
+            manifold_api_session_auth = request.session['manifold']['auth']
+
+        if debug_empty and manifold_query.action.lower()=='get':
+            json_answer=json.dumps({'code':0,'value':[]})
+            print "By-passing : debug_empty & 'get' request : returning a fake empty list"
+            return HttpResponse (json_answer, mimetype="application/json")
+        ### patch : return the latest one..
+        if work_offline:
+            # if that won't work then we'll try to update anyways
+            try:
+                with (file(offline_filename,"r")) as f:
+                    json_answer=f.read()
+                print "By-passing : using contents from %s"%offline_filename
+                return HttpResponse (json_answer, mimetype="application/json")
+            except:
+                import traceback
+                traceback.print_exc()
+                print "Could not run in offline mode, PROCEEDING"
+                pass
+                
         # actually forward
         manifold_api= ManifoldAPI(auth=manifold_api_session_auth)
-        if debug: print 'manifoldproxy.proxy: sending to backend', manifold_query
-        answer=manifold_api.send_manifold_query (manifold_query)
-        if debug_spin:
+        if debug: print '===> manifoldproxy.proxy: sending to backend', manifold_query
+        # for the benefit of the python code, manifoldAPI raises an exception if something is wrong
+        # however in this case we want to propagate the complete manifold result to the js world
+
+
+        result = manifold_api.forward(manifold_query.to_dict())
+
+        # XXX TEMP HACK
+        if 'description' in result and result['description'] and isinstance(result['description'], (tuple, list, set, frozenset)):
+            result [ 'description' ] = [ ResultValue.to_html (x) for x in result['description'] ]
+
+        json_answer=json.dumps(result)
+        # if in debug mode we save this so we can use offline mode later
+        if debug:
+            with (file(offline_filename,"w")) as f:
+                f.write(json_answer)
+
+        # this is an artificial delay added for debugging purposes only
+        if debug_spin>0:
+            print "Adding additional artificial delay",debug_spin
             import time
             time.sleep(debug_spin)
-        # return json-encoded answer
-        return HttpResponse (json.dumps(answer), mimetype="application/json")
-    except:
+
+        return HttpResponse (json_answer, mimetype="application/json")
+
+    except Exception,e:
+        print "** PROXY ERROR **",e
         import traceback
         traceback.print_exc()