2 # this is for django objects only
3 #from django.core import serializers
4 from django.http import HttpResponse, HttpResponseForbidden
6 #from manifold.manifoldquery import ManifoldQuery
7 from manifold.core.query import Query
8 from manifold.manifoldapi import ManifoldAPI
13 # add artificial delay in s
17 # pretend the server only returns - empty lists to 'get' requests - this is to mimick
18 # misconfigurations or expired credentials or similar corner case situations
22 # turn this on if you want the fastest possible (locally cached) feedback
23 # beware that this is very rough though...
27 # this view is what the javascript talks to when it sends a query
31 # static/js/manifold.js
32 def proxy (request,format):
33 """the view associated with /manifold/proxy/
34 with the query passed using POST"""
37 if request.method != 'POST':
38 print "manifoldproxy.api: unexpected method %s -- exiting"%request.method
40 # we only support json for now
41 # if needed in the future we should probably cater for
42 # format_in : how is the query encoded in POST
43 # format_out: how to serve the results
45 print "manifoldproxy.proxy: unexpected format %s -- exiting"%format
48 # translate incoming POST request into a query object
49 if debug: print 'manifoldproxy.proxy: request.POST',request.POST
50 manifold_query = Query()
51 #manifold_query = ManifoldQuery()
52 manifold_query.fill_from_POST(request.POST)
53 offline_filename="offline-%s-%s.json"%(manifold_query.action,manifold_query.object)
54 # retrieve session for request
55 manifold_api_session_auth = request.session['manifold']['auth']
56 if debug_empty and manifold_query.action.lower()=='get':
57 json_answer=json.dumps({'code':0,'value':[]})
58 print "By-passing : debug_empty & 'get' request : returning a fake empty list"
59 return HttpResponse (json_answer, mimetype="application/json")
60 ### patch : return the latest one..
62 # if that won't work then we'll try to update anyways
64 with (file(offline_filename,"r")) as f:
66 print "By-passing : using contents from %s"%offline_filename
67 return HttpResponse (json_answer, mimetype="application/json")
71 print "Could not run in offline mode, PROCEEDING"
75 manifold_api= ManifoldAPI(auth=manifold_api_session_auth)
76 if debug: print 'manifoldproxy.proxy: sending to backend', manifold_query
77 answer=manifold_api.send_manifold_query (manifold_query)
79 print "ANSWER IN PROXY", answer
80 print answer.ok_value()
83 print '<=== manifoldproxy.proxy: received from backend with code', answer['code']
86 value=answer.ok_value()
87 if isinstance (value, list): print "result is a list with %d entries"%len(value)
88 elif isinstance (value, dict): print "result is a dict with keys %s"%value.keys()
89 else: print "result is other (type=%s) : %s"%(type(value),value)
90 json_answer=json.dumps(answer)
91 # if in debug mode we save this so we can use offline mode later
93 with (file(offline_filename,"w")) as f:
95 # this is an artificial delay added for debugging purposes only
97 print "Adding additional artificial delay",debug_spin
99 time.sleep(debug_spin)
100 return HttpResponse (json_answer, mimetype="application/json")
104 traceback.print_exc()
107 # see CSRF_FAILURE_VIEW in settings.py
108 # the purpose of redefining this was to display the failure reason somehow
109 # this however turns out disappointing/not very informative
110 failure_answer=[ "csrf_failure" ]
111 def csrf_failure(request, reason=""):
112 print "CSRF failure with reason '%s'"%reason
113 return HttpResponseForbidden (json.dumps (failure_answer), mimetype="application/json")