4 # this is for django objects only
5 #from django.core import serializers
6 from django.http import HttpResponse, HttpResponseForbidden
8 #from manifold.manifoldquery import ManifoldQuery
9 from manifold.core.query import Query
10 from manifold.core.result_value import ResultValue
11 from manifold.manifoldapi import ManifoldAPI
12 from manifold.manifoldresult import ManifoldException
13 from manifold.util.log import Log
14 from myslice.config import Config
19 # add artificial delay in s
23 # pretend the server only returns - empty lists to 'get' requests - this is to mimick
24 # misconfigurations or expired credentials or similar corner case situations
28 # this view is what the javascript talks to when it sends a query
32 # static/js/manifold.js
33 def proxy (request,format):
34 """the view associated with /manifold/proxy/
35 with the query passed using POST"""
38 if request.method != 'POST':
39 print "manifoldproxy.api: unexpected method %s -- exiting"%request.method
41 # we only support json for now
42 # if needed in the future we should probably cater for
43 # format_in : how is the query encoded in POST
44 # format_out: how to serve the results
46 print "manifoldproxy.proxy: unexpected format %s -- exiting"%format
49 # translate incoming POST request into a query object
50 if debug: print 'manifoldproxy.proxy: request.POST',request.POST
51 manifold_query = Query()
52 #manifold_query = ManifoldQuery()
53 manifold_query.fill_from_POST(request.POST)
54 # retrieve session for request
56 # We allow some requests to use the ADMIN user account
57 if (manifold_query.get_from() == 'local:user' and manifold_query.get_action() == 'create') \
58 or (manifold_query.get_from() == 'local:platform' and manifold_query.get_action() == 'get'):
59 admin_user, admin_password = Config().manifold_admin_user_password()
60 manifold_api_session_auth = {'AuthMethod': 'password', 'Username': admin_user, 'AuthString': admin_password}
62 manifold_api_session_auth = request.session['manifold']['auth']
64 if debug_empty and manifold_query.action.lower()=='get':
65 json_answer=json.dumps({'code':0,'value':[]})
66 print "By-passing : debug_empty & 'get' request : returning a fake empty list"
67 return HttpResponse (json_answer, mimetype="application/json")
70 manifold_api= ManifoldAPI(auth=manifold_api_session_auth)
71 if debug: print '===> manifoldproxy.proxy: sending to backend', manifold_query
72 # for the benefit of the python code, manifoldAPI raises an exception if something is wrong
73 # however in this case we want to propagate the complete manifold result to the js world
75 result = manifold_api.forward(manifold_query.to_dict())
78 if 'description' in result and result['description'] \
79 and isinstance(result['description'], (tuple, list, set, frozenset)):
80 result [ 'description' ] = [ ResultValue.to_html (x) for x in result['description'] ]
82 json_answer=json.dumps(result)
84 # this is an artificial delay added for debugging purposes only
86 print "Adding additional artificial delay",debug_spin
88 time.sleep(debug_spin)
90 return HttpResponse (json_answer, mimetype="application/json")
93 print "** PROXY ERROR **",e
98 # see CSRF_FAILURE_VIEW in settings.py
99 # the purpose of redefining this was to display the failure reason somehow
100 # this however turns out disappointing/not very informative
101 failure_answer=[ "csrf_failure" ]
102 def csrf_failure(request, reason=""):
103 print "CSRF failure with reason '%s'"%reason
104 return HttpResponseForbidden (json.dumps (failure_answer), mimetype="application/json")