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