import json
+import os.path
+
# this is for django objects only
#from django.core import serializers
-from django.http import HttpResponse, HttpResponseForbidden
+from django.http import HttpResponse, HttpResponseForbidden
+
+#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
+from manifold.util.log import Log
-from manifold.manifoldquery import ManifoldQuery
-from manifold.manifoldapi import ManifoldAPI
+debug=False
+debug=True
# add artificial delay in s
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
# as well as
-# static/js/manifold-async.js
-def api (request,format):
- """the view associated with /manifold/api/
+# static/js/manifold.js
+def proxy (request,format):
+ """the view associated with /manifold/proxy/
with the query passed using POST"""
# expecting a 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
- manifold_query = ManifoldQuery()
- manifold_query.fill_from_dict(request.POST)
+ if debug: print 'manifoldproxy.proxy: request.POST',request.POST
+ manifold_query = Query()
+ #manifold_query = ManifoldQuery()
+ manifold_query.fill_from_POST(request.POST)
+ offline_filename="%s/../offline-%s-%s.json"%(os.path.dirname(__file__),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)
- 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()