planetstack/core/plus/views.py

   1 #views.py
   2 import functools
   3 import math
   4 import os
   5 import sys
   6 from django.views.generic import TemplateView, View
   7 import datetime
   8 from pprint import pprint
   9 import json
  10 from core.models import *
  11 from operator import attrgetter
  12 from django.views.decorators.csrf import csrf_exempt
  13 from django.http import HttpResponse, HttpResponseServerError
  14 from django.core import urlresolvers
  15 from django.contrib.gis.geoip import GeoIP
  16 from ipware.ip import get_ip
  17 import traceback
  18 import socket
  19
  20 BLESSED_SITES = ["Stanford", "Washington", "Princeton", "GeorgiaTech", "MaxPlanck"]
  21
  22 if os.path.exists("/home/smbaker/projects/vicci/cdn/bigquery"):
  23     sys.path.append("/home/smbaker/projects/vicci/cdn/bigquery")
  24 else:
  25     sys.path.append("/opt/planetstack/hpc_wizard")
  26 import hpc_wizard
  27 from planetstack_analytics import DoPlanetStackAnalytics, PlanetStackAnalytics, RED_LOAD, BLUE_LOAD
  28
  29 class DashboardWelcomeView(TemplateView):
  30     template_name = 'admin/dashboard/welcome.html'
  31
  32     def get(self, request, *args, **kwargs):
  33         context = self.get_context_data(**kwargs)
  34         userDetails = getUserSliceInfo(request.user)
  35         #context['site'] = userDetails['site']
  36
  37         context['userSliceInfo'] = userDetails['userSliceInfo']
  38         context['cdnData'] = userDetails['cdnData']
  39         return self.render_to_response(context=context)
  40
  41 def getUserSliceInfo(user, tableFormat = False):
  42         userDetails = {}
  43 #        try:
  44 # //           site = Site.objects.filter(id=user.site.id)
  45 #  //      except:
  46 #   //         site = Site.objects.filter(name="Princeton")
  47 #    //    userDetails['sitename'] = site[0].name
  48 #     //   userDetails['siteid'] = site[0].id
  49
  50         userSliceData = getSliceInfo(user)
  51         if (tableFormat):
  52 #            pprint("*******      GET USER SLICE INFO")
  53             userDetails['userSliceInfo'] = userSliceTableFormatter(userSliceData)
  54         else:
  55             userDetails['userSliceInfo'] = userSliceData
  56         userDetails['cdnData'] = getCDNOperatorData(wait=False);
  57 #        pprint( userDetails)
  58         return userDetails
  59
  60 class TenantCreateSlice(View):
  61     def post(self, request, *args, **kwargs):
  62         sliceName = request.POST.get("sliceName", "0")
  63         serviceClass = request.POST.get("serviceClass", "0")
  64         imageName = request.POST.get("imageName", "0")
  65         actionToDo = request.POST.get("actionToDo", "0")
  66         network = request.POST.get("network","0")
  67         mountDataSets = request.POST.get("mountDataSets","0")
  68         if (actionToDo == "add"):
  69            serviceClass = ServiceClass.objects.get(name=serviceClass)
  70            site = request.user.site
  71            #image = Image.objects.get(name=imageName)
  72            newSlice = Slice(name=sliceName,serviceClass=serviceClass,site=site,imagePreference=imageName,mountDataSets=mountDataSets,network=network)
  73            newSlice.save()
  74         return newSlice
  75
  76 class TenantUpdateSlice(View):
  77     def post(self, request, *args, **kwargs):\r
  78         sliceName = request.POST.get("sliceName", "0")\r
  79         serviceClass = request.POST.get("serviceClass", "0")\r
  80         imageName = request.POST.get("imageName", "0")\r
  81         actionToDo = request.POST.get("actionToDo", "0")\r
  82         network = request.POST.get("network","0")\r
  83         slice = Slice.objects.filter(name = sliceName)\r
  84         abc = ServiceClass.objects.get(name=serviceClass)\r
  85         if (actionToDo == "update"):\r
  86         #       print getattr(slice,'serviceClass',abc)\r
  87                 setattr(slice,'serviceClass',abc)\r
  88         #fields = {'serviceClass':ServiceClass.objects.get(name=serviceClass),\r
  89          #         'imagePreference':imageName,\r
  90           #        'network':network\r
  91            #      }\r
  92         #update_slice(sliceName,**fields)\r
  93         return HttpResponse("Slice updated")
  94
  95 def  update_slice(sliceName,**fields):
  96          slice = Slice.objects.filter(name = sliceName)\r
  97          for (k,v) in fields.items():\r
  98                 setattr(slice, k, v)\r
  99                 slice.save()\r
 100          return slice
 101
 102 def getTenantSliceInfo(user, tableFormat = False):
 103     tenantSliceDetails = {}
 104     tenantSliceData = getTenantInfo(user)
 105     tenantServiceClassData = getServiceClassInfo(user)
 106     if (tableFormat):
 107        tenantSliceDetails['userSliceInfo'] = userSliceTableFormatter(tenantSliceData)
 108        tenantSliceDetails['sliceServiceClass']=userSliceTableFormatter(tenantServiceClassData)
 109     else:
 110        tenantSliceDetails['userSliceInfo'] = tenantSliceData
 111     tenantSliceDetails['sliceServiceClass']=userSliceTableFormatter(tenantServiceClassData)
 112     tenantSliceDetails['image']=userSliceTableFormatter(getImageInfo(user))
 113     tenantSliceDetails['network']=userSliceTableFormatter(getNetworkInfo(user))
 114     tenantSliceDetails['deploymentSites']=userSliceTableFormatter(getDeploymentSites())
 115     tenantSliceDetails['sites'] = userSliceTableFormatter(getTenantSitesInfo())
 116     tenantSliceDetails['mountDataSets'] = userSliceTableFormatter(getMountDataSets())
 117     return tenantSliceDetails
 118
 119
 120 def getTenantInfo(user):
 121     slices =Slice.objects.all()
 122     userSliceInfo = []
 123     for entry in slices:
 124        sliceName = Slice.objects.get(id=entry.id).name
 125        slice = Slice.objects.get(name=Slice.objects.get(id=entry.id).name)
 126        sliceServiceClass = entry.serviceClass.name
 127        preferredImage =  entry.imagePreference
 128        sliceDataSet = entry.mountDataSets
 129        sliceNetwork = entry.network
 130        numSliver = 0
 131        sliceImage=""
 132        sliceSite = {}
 133        sliceNode = {}
 134        sliceInstance= {}
 135        for sliver in slice.slivers.all():
 136             if sliver.node.site.name in BLESSED_SITES:
 137                 sliceSite[sliver.node.site.name] = sliceSite.get(sliver.node.site.name,0) + 1
 138                 sliceImage = sliver.image.name
 139                 sliceNode[sliver.instance_name] = sliver.name
 140        numSliver = sum(sliceSite.values())
 141        numSites = len(sliceSite)
 142        userSliceInfo.append({'sliceName': sliceName,'sliceServiceClass': sliceServiceClass,'preferredImage':preferredImage,'numOfSites':numSites, 'sliceSite':sliceSite,'sliceImage':sliceImage,'numOfSlivers':numSliver,'sliceDataSet':sliceDataSet,'sliceNetwork':sliceNetwork, 'instanceNodePair':sliceNode})
 143     return userSliceInfo
 144
 145 def getTenantSitesInfo():
 146         tenantSiteInfo=[]
 147         for entry in Site.objects.all():
 148             if entry.name in BLESSED_SITES:
 149                  tenantSiteInfo.append({'siteName':entry.name})
 150         return tenantSiteInfo
 151
 152 def userSliceTableFormatter(data):
 153 #    pprint(data)
 154     formattedData = {
 155                      'rows' : data
 156                     }
 157     return formattedData
 158
 159 def getServiceClassInfo(user):
 160     serviceClassList = ServiceClass.objects.all()
 161     sliceInfo = []
 162     for entry in serviceClassList:
 163           sliceInfo.append({'serviceClass':entry.name})
 164     return sliceInfo
 165
 166 def getImageInfo(user):
 167     #imageList = Image.objects.all()
 168     imageList = ['Fedora 16 LXC rev 1.3','Hadoop','MPI']
 169     imageInfo = []
 170     for imageEntry in imageList:
 171           #imageInfo.append({'Image':imageEntry.name})
 172           imageInfo.append({'Image':imageEntry})
 173     return imageInfo
 174
 175 def getMountDataSets():
 176         dataSetList = ['------','GenBank','LSST','LHC','NOAA','Measurement Lab','Common Crawl']\r
 177         dataSetInfo = []\r
 178         for entry in dataSetList:\r
 179                 dataSetInfo.append({'DataSet':entry})\r
 180         return dataSetInfo
 181
 182 def getNetworkInfo(user):
 183    #networkList = Network.objects.all()
 184     networkList = ['Private Only','Private and Publicly Routable']
 185     networkInfo = []
 186     for networkEntry in networkList:
 187           #networkInfo.append({'Network':networkEntry.name})
 188           networkInfo.append({'Network':networkEntry})
 189     return networkInfo
 190
 191 def getDeploymentSites():
 192     deploymentList = Deployment.objects.all()
 193     deploymentInfo = []
 194     for entry in deploymentList:
 195         deploymentInfo.append({'DeploymentSite':entry.name})
 196     return deploymentInfo
 197
 198 def getSliceInfo(user):
 199     sliceList = Slice.objects.all()
 200     slicePrivs = SlicePrivilege.objects.filter(user=user)
 201     userSliceInfo = []
 202     for entry in slicePrivs:
 203
 204         slicename = Slice.objects.get(id=entry.slice.id).name
 205         slice = Slice.objects.get(name=Slice.objects.get(id=entry.slice.id).name)
 206         sliverList=Sliver.objects.all()
 207         sites_used = {}
 208         for sliver in slice.slivers.all():
 209              #sites_used['deploymentSites'] = sliver.node.deployment.name
 210              # sites_used[sliver.image.name] = sliver.image.name
 211              sites_used[sliver.node.site.name] = sliver.numberCores
 212         sliceid = Slice.objects.get(id=entry.slice.id).id
 213         try:
 214             sliverList = Sliver.objects.filter(slice=entry.slice.id)
 215             siteList = {}
 216             for x in sliverList:
 217                if x.node.site not in siteList:
 218                   siteList[x.node.site] = 1
 219             slivercount = len(sliverList)
 220             sitecount = len(siteList)
 221         except:
 222             traceback.print_exc()
 223             slivercount = 0
 224             sitecount = 0
 225
 226         userSliceInfo.append({'slicename': slicename, 'sliceid':sliceid,
 227                               'sitesUsed':sites_used,
 228                               'role': SliceRole.objects.get(id=entry.role.id).role,
 229                               'slivercount': slivercount,
 230                               'sitecount':sitecount})
 231
 232     return userSliceInfo
 233
 234 def getCDNOperatorData(randomizeData = False, wait=True):
 235     HPC_SLICE_NAME = "HyperCache"
 236
 237     bq = PlanetStackAnalytics()
 238
 239     rows = bq.get_cached_query_results(bq.compose_latest_query(groupByFields=["%hostname", "event", "%slice"]), wait)
 240
 241     # wait=False on the first time the Dashboard is opened. This means we might
 242     # not have any rows yet. The dashboard code polls every 30 seconds, so it
 243     # will eventually pick them up.
 244
 245     if rows:
 246         rows = bq.postprocess_results(rows, filter={"slice": HPC_SLICE_NAME}, maxi=["cpu"], count=["hostname"], computed=["bytes_sent/elapsed"], groupBy=["Time","site"], maxDeltaTime=80)
 247
 248         # dictionaryize the statistics rows by site name
 249         stats_rows = {}
 250         for row in rows:
 251             stats_rows[row["site"]] = row
 252     else:
 253         stats_rows = {}
 254
 255     slice = Slice.objects.get(name=HPC_SLICE_NAME)
 256     slice_slivers = list(slice.slivers.all())
 257
 258     new_rows = {}
 259     for site in Site.objects.all():
 260         # compute number of slivers allocated in the data model
 261         allocated_slivers = 0
 262         for sliver in slice_slivers:
 263             if sliver.node.site == site:
 264                 allocated_slivers = allocated_slivers + 1
 265
 266         stats_row = stats_rows.get(site.name,{})
 267
 268         max_cpu = stats_row.get("max_avg_cpu", stats_row.get("max_cpu",0))
 269         cpu=float(max_cpu)/100.0
 270         hotness = max(0.0, ((cpu*RED_LOAD) - BLUE_LOAD)/(RED_LOAD-BLUE_LOAD))
 271
 272         # format it to what that CDN Operations View is expecting
 273         new_row = {"lat": float(site.location.longitude),
 274                "long": float(site.location.longitude),
 275                "lat": float(site.location.latitude),
 276                "health": 0,
 277                "numNodes": int(site.nodes.count()),
 278                "activeHPCSlivers": int(stats_row.get("count_hostname", 0)),         # measured number of slivers, from bigquery statistics
 279                "numHPCSlivers": allocated_slivers,                              # allocated number of slivers, from data model
 280                "siteUrl": str(site.site_url),
 281                "bandwidth": stats_row.get("sum_computed_bytes_sent_div_elapsed",0),
 282                "load": max_cpu,
 283                "hot": float(hotness)}
 284         new_rows[str(site.name)] = new_row
 285
 286     # get rid of sites with 0 slivers that overlap other sites with >0 slivers
 287     for (k,v) in new_rows.items():
 288         bad=False
 289         if v["numHPCSlivers"]==0:
 290             for v2 in new_rows.values():
 291                 if (v!=v2) and (v2["numHPCSlivers"]>=0):
 292                     d = haversine(v["lat"],v["long"],v2["lat"],v2["long"])
 293                     if d<100:
 294                          bad=True
 295             if bad:
 296                 del new_rows[k]
 297
 298     return new_rows
 299
 300 class SimulatorView(View):
 301     def get(self, request, **kwargs):
 302         sim = json.loads(file("/tmp/simulator.json","r").read())
 303         text = "<html><head></head><body>"
 304         text += "Iteration: %d<br>" % sim["iteration"]
 305         text += "Elapsed since report %d<br><br>" % sim["elapsed_since_report"]
 306         text += "<table border=1>"
 307         text += "<tr><th>site</th><th>trend</th><th>weight</th><th>bytes_sent</th><th>hot</th></tr>"
 308         for site in sim["site_load"].values():
 309             text += "<tr>"
 310             text += "<td>%s</td><td>%0.2f</td><td>%0.2f</td><td>%d</td><td>%0.2f</td>" % \
 311                         (site["name"], site["trend"], site["weight"], site["bytes_sent"], site["load_frac"])
 312             text += "</tr>"
 313         text += "</table>"
 314         text += "</body></html>"
 315         return HttpResponse(text)
 316
 317 class DashboardUserSiteView(View):
 318     def get(self, request, **kwargs):
 319         return HttpResponse(json.dumps(getUserSliceInfo(request.user, True)), mimetype='application/javascript')
 320
 321 class TenantViewData(View):
 322     def get(self, request, **kwargs):
 323         return HttpResponse(json.dumps(getTenantSliceInfo(request.user, True)), mimetype='application/javascript')
 324
 325 def haversine(site_lat, site_lon, lat, lon):
 326     site_lat = float(site_lat)
 327     site_lon = float(site_lon)
 328     lat = float(lat)
 329     lon = float(lon)
 330     d=0
 331     if lat and lon and site_lat and site_lon:
 332         R = 6378.1
 333         a = math.sin( math.radians((lat - site_lat)/2.0) )**2 + math.cos( math.radians(lat) )*math.cos( math.radians(site_lat) )*(math.sin( math.radians((lon - site_lon)/2.0 ) )**2)
 334         c = 2 * math.atan2( math.sqrt(a), math.sqrt(1 - a) )
 335         d = R * c
 336
 337     return d
 338
 339 def siteSortKey(site, slice=None, count=None, lat=None, lon=None):
 340     # try to pick a site we're already using
 341     has_slivers_here=False
 342     if slice:
 343         for sliver in slice.slivers.all():
 344             if sliver.node.site.name == site.name:
 345                 has_slivers_here=True
 346
 347     # Haversine method
 348     d = haversine(site.location.latitude, site.location.longitude, lat, lon)
 349
 350     return (-has_slivers_here, d)
 351
 352 def tenant_pick_sites(user, user_ip=None, slice=None, count=None):
 353     """ Returns list of sites, sorted from most favorable to least favorable """
 354     lat=None
 355     lon=None
 356     try:
 357         client_geo = GeoIP().city(user_ip)
 358         if client_geo:
 359             lat=float(client_geo["latitude"])
 360             lon=float(client_geo["longitude"])
 361     except:
 362         print "exception in geo code"
 363         traceback.print_exc()
 364
 365     sites = Site.objects.all()
 366     sites = [x for x in sites if x.name in BLESSED_SITES]
 367     sites = sorted(sites, key=functools.partial(siteSortKey, slice=slice, count=count, lat=lat, lon=lon))
 368
 369     return sites
 370
 371 def slice_increase_slivers(user, user_ip, siteList, slice, count, noAct=False):
 372     sitesChanged = {}
 373
 374     # let's compute how many slivers are in use in each node of each site
 375     for site in siteList:
 376         site.nodeList = list(site.nodes.all())
 377         for node in site.nodeList:
 378             node.sliverCount = 0
 379             for sliver in node.slivers.all():
 380                  if sliver.slice.id == slice.id:
 381                      node.sliverCount = node.sliverCount + 1
 382
 383     # Allocate slivers to nodes
 384     # for now, assume we want to allocate all slivers from the same site
 385     nodes = siteList[0].nodeList
 386     while (count>0):
 387         # Sort the node list by number of slivers per node, then pick the
 388         # node with the least number of slivers.
 389         nodes = sorted(nodes, key=attrgetter("sliverCount"))
 390         node = nodes[0]
 391
 392         print "adding sliver at node", node.name, "of site", node.site.name
 393
 394         if not noAct:
 395             sliver = Sliver(name=node.name,
 396                         slice=slice,
 397                         node=node,
 398                         image = Image.objects.all()[0],
 399                         creator = User.objects.get(email=user),
 400                         deploymentNetwork=node.deployment,
 401                         numberCores =1 )
 402             sliver.save()
 403
 404         node.sliverCount = node.sliverCount + 1
 405
 406         count = count - 1
 407
 408         sitesChanged[node.site.name] = sitesChanged.get(node.site.name,0) + 1
 409
 410     return sitesChanged
 411
 412 def slice_decrease_slivers(user, siteList, slice, count, noAct=False):
 413     sitesChanged = {}
 414     sliverList ={}
 415     if siteList:
 416         siteNames = [site.name for site in siteList]
 417     else:
 418         siteNames = None
 419
 420     for sliver in slice.slivers.all():
 421         if(not siteNames) or (sliver.node.site.name in siteNames):\r
 422                 node = sliver.node\r
 423                 sliverList[sliver.name]=node.name
 424
 425     for key in sliverList:
 426         if count>0:
 427             sliver = Sliver.objects.filter(name=key)[0]\r
 428             sliver.delete()\r
 429             print "deleting sliver",sliverList[key],"at node",sliver.node.name\r
 430             count=count-1\r
 431             sitesChanged[sliver.node.site.name] = sitesChanged.get(sliver.node.site.name,0) - 1\r
 432 \r
 433     return sitesChanged
 434
 435 class TenantDeleteSliceView(View):
 436         def post(self,request):\r
 437                 sliceName = request.POST.get("sliceName",None)\r
 438                 slice = Slice.objects.get(name=sliceName)\r
 439                 print slice, slice.id\r
 440                 sliceToDel=Slice(name=sliceName, id=slice.id)\r
 441                 sliceToDel.delete()
 442
 443 class TenantAddOrRemoveSliverView(View):
 444     """ Add or remove slivers from a Slice
 445
 446         Arguments:
 447             siteName - name of site. If not specified, PlanetStack will pick the
 448                        best site.,
 449             actionToDo - [add | rem]
 450             count - number of slivers to add or remove
 451             sliceName - name of slice
 452             noAct - if set, no changes will be made to db, but result will still
 453                     show which sites would have been modified.
 454
 455         Returns:
 456             Dictionary of sites that were modified, and the count of nodes
 457             that were added or removed at each site.
 458     """
 459     def post(self, request, *args, **kwargs):
 460         siteName = request.POST.get("siteName", None)
 461         actionToDo = request.POST.get("actionToDo", None)
 462         count = int(request.POST.get("count","0"))
 463         sliceName = request.POST.get("slice", None)
 464         noAct = request.POST.get("noAct", False)
 465
 466         if not sliceName:
 467             return HttpResponseServerError("No slice name given")
 468
 469         slice = Slice.objects.get(name=sliceName)
 470
 471         if siteName:
 472             siteList = [Site.objects.get(name=siteName)]
 473         else:
 474             siteList = None
 475
 476         if (actionToDo == "add"):
 477             user_ip = request.GET.get("ip", get_ip(request))
 478             if (siteList is None):
 479                 siteList = tenant_pick_sites(user, user_ip, slice, count)
 480
 481             sitesChanged = slice_increase_slivers(request.user, user_ip, siteList, slice, count, noAct)
 482         elif (actionToDo == "rem"):
 483             sitesChanged = slice_decrease_slivers(request.user, siteList, slice, count, noAct)
 484         else:
 485             return HttpResponseServerError("Unknown actionToDo %s" % actionToDo)
 486
 487         return HttpResponse(json.dumps(sitesChanged), mimetype='application/javascript')
 488
 489     def get(self, request, *args, **kwargs):
 490         request.POST = request.GET
 491         return self.post(request, *args, **kwargs)  # for testing REST in browser
 492         #return HttpResponseServerError("GET is not supported")
 493
 494 class TenantPickSitesView(View):
 495     """ primarily just for testing purposes """
 496     def get(self, request, *args, **kwargs):
 497         count = request.GET.get("count","0")
 498         slice = request.GET.get("slice",None)
 499         if slice:
 500             slice = Slice.objects.get(name=slice)
 501         ip = request.GET.get("ip", get_ip(request))
 502         sites = tenant_pick_sites(request.user, user_ip=ip, count=0, slice=slice)
 503         sites = [x.name for x in sites]
 504         return HttpResponse(json.dumps(sites), mimetype='application/javascript')
 505
 506 class DashboardSummaryAjaxView(View):
 507     def get(self, request, **kwargs):
 508         def avg(x):
 509             return float(sum(x))/len(x)
 510
 511         sites = getCDNOperatorData().values()
 512
 513         sites = [site for site in sites if site["numHPCSlivers"]>0]
 514
 515         total_slivers = sum( [site["numHPCSlivers"] for site in sites] )
 516         total_bandwidth = sum( [site["bandwidth"] for site in sites] )
 517         average_cpu = int(avg( [site["load"] for site in sites] ))
 518
 519         result= {"total_slivers": total_slivers,
 520                 "total_bandwidth": total_bandwidth,
 521                 "average_cpu": average_cpu}
 522
 523         return HttpResponse(json.dumps(result), mimetype='application/javascript')
 524
 525 class DashboardAddOrRemoveSliverView(View):
 526     # TODO: deprecate this view in favor of using TenantAddOrRemoveSliverView
 527
 528     def post(self, request, *args, **kwargs):
 529         siteName = request.POST.get("site", None)
 530         actionToDo = request.POST.get("actionToDo", "0")
 531
 532         siteList = [Site.objects.get(name=siteName)]
 533         slice = Slice.objects.get(name="HyperCache")
 534
 535         if (actionToDo == "add"):
 536             user_ip = request.GET.get("ip", get_ip(request))
 537             slice_increase_slivers(request.user, user_ip, siteList, slice, 1)
 538         elif (actionToDo == "rem"):
 539             slice_decrease_slivers(request.user, siteList, slice, 1)
 540
 541         print '*' * 50
 542         print 'Ask for site: ' + siteName + ' to ' + actionToDo + ' another HPC Sliver'
 543         return HttpResponse('This is POST request ')
 544
 545 class DashboardAjaxView(View):
 546     def get(self, request, **kwargs):
 547         return HttpResponse(json.dumps(getCDNOperatorData(True)), mimetype='application/javascript')
 548
 549 class DashboardAnalyticsAjaxView(View):
 550     def get(self, request, name="hello_world", **kwargs):
 551         if (name == "hpcSummary"):
 552             return HttpResponse(json.dumps(hpc_wizard.get_hpc_wizard().get_summary_for_view()), mimetype='application/javascript')
 553         elif (name == "hpcUserSite"):
 554             return HttpResponse(json.dumps(getUserSliceInfo(request.user, True)), mimetype='application/javascript')
 555         elif (name == "hpcMap"):
 556             return HttpResponse(json.dumps(getCDNOperatorData(True)), mimetype='application/javascript')
 557         elif (name == "bigquery"):
 558             (mimetype, data) = DoPlanetStackAnalytics(request)
 559             return HttpResponse(data, mimetype=mimetype)
 560         else:
 561             return HttpResponse(json.dumps("Unknown"), mimetype='application/javascript')
 562