portal/manageuserview.py

   1 from unfold.loginrequired               import LoginRequiredAutoLogoutView
   2 #
   3 from manifold.core.query                import Query
   4 from manifoldapi.manifoldapi            import execute_query, execute_admin_query
   5 from portal.actions                     import manifold_update_user, manifold_update_account, manifold_add_account, manifold_delete_account
   6 from portal.actions                     import sfa_update_user, authority_get_pis, authority_add_pis, authority_remove_pis, clear_user_creds
   7 #
   8 from unfold.page                        import Page
   9 from ui.topmenu                         import topmenu_items_live, the_user
  10 #
  11 from django.http                        import HttpResponse, HttpResponseRedirect
  12 from django.contrib                     import messages
  13 from django.contrib.auth.decorators     import login_required
  14 from myslice.theme import ThemeView
  15 #
  16 import json, os, re, itertools
  17
  18 # requires login
  19 class UserView(LoginRequiredAutoLogoutView, ThemeView):
  20     template_name = "manageuserview.html"
  21     def dispatch(self, *args, **kwargs):
  22         return super(UserView, self).dispatch(*args, **kwargs)
  23
  24
  25     def get_context_data(self, **kwargs):
  26
  27         page = Page(self.request)
  28         page.add_js_files  ( [ "js/jquery.validate.js", "js/my_account.register.js", "js/my_account.edit_profile.js", "js/jquery-ui.js" ] )
  29         page.add_css_files ( [ "css/onelab.css", "css/account_view.css","css/plugin.css","css/jquery-ui.css" ] )
  30
  31         for key, value in kwargs.iteritems():
  32             #print "%s = %s" % (key, value)
  33             if key == "email":
  34                 selected_email=value
  35
  36         user_query  = Query().get('local:user').filter_by('email', '==', selected_email).select('user_id','config','email','status')
  37         user_details = execute_admin_query(self.request, user_query)
  38
  39         # not always found in user_details...
  40         config={}
  41         for user_detail in user_details:
  42             user_id = user_detail['user_id']
  43             user_email = user_detail['email']
  44             # different significations of user_status
  45             if user_detail['status'] == 0:
  46                 user_status = 'Disabled'
  47             elif user_detail['status'] == 1:
  48                 user_status = 'Validation Pending'
  49             elif user_detail['status'] == 2:
  50                 user_status = 'Enabled'
  51             else:
  52                 user_status = 'N/A'
  53             #email = user_detail['email']
  54             if user_detail['config']:
  55                 config = json.loads(user_detail['config'])
  56                 authority_hrn = config.get('authority','Unknown Authority')
  57
  58
  59         platform_query  = Query().get('local:platform').select('platform_id','platform','gateway_type','disabled')
  60         account_query  = Query().get('local:account').filter_by('user_id', '==', user_id).select('user_id','platform_id','auth_type','config')
  61         platform_details = execute_query(self.request, platform_query)
  62         account_details = execute_admin_query(self.request, account_query)
  63
  64         # initial assignment needed for users having account.config = {}
  65         platform_name = ''
  66         account_type = ''
  67         account_usr_hrn = ''
  68         account_pub_key = ''
  69         account_priv_key = ''
  70         account_reference = ''
  71         my_users = ''
  72         my_slices = ''
  73         my_auths = ''
  74         ref_acc_list = ''
  75         principal_acc_list = ''
  76         user_status_list = []
  77         platform_name_list = []
  78         platform_name_secondary_list = []
  79         platform_access_list = []
  80         platform_no_access_list = []
  81         total_platform_list = []
  82         account_type_list = []
  83         account_type_secondary_list = []
  84         account_reference_list = []
  85         delegation_type_list = []
  86         user_cred_exp_list = []
  87         slice_list = []
  88         auth_list = []
  89         slice_cred_exp_list = []
  90         auth_cred_exp_list = []
  91         usr_hrn_list = []
  92         pub_key_list = []
  93
  94         for platform_detail in platform_details:
  95             if 'sfa' in platform_detail['gateway_type']:
  96                 total_platform = platform_detail['platform']
  97                 total_platform_list.append(total_platform)
  98
  99             for account_detail in account_details:
 100                 if platform_detail['platform_id'] == account_detail['platform_id']:
 101                     platform_name = platform_detail['platform']
 102                     if 'config' in account_detail and account_detail['config'] is not '':
 103                         account_config = json.loads(account_detail['config'])
 104                         account_usr_hrn = account_config.get('user_hrn','N/A')
 105                         account_pub_key = account_config.get('user_public_key','N/A')
 106                         account_reference = account_config.get ('reference_platform','N/A')
 107
 108                     # credentials of myslice platform
 109                     if 'myslice' in platform_detail['platform']:
 110                         acc_user_cred = account_config.get('delegated_user_credential','N/A')
 111                         acc_slice_cred = account_config.get('delegated_slice_credentials','N/A')
 112                         acc_auth_cred = account_config.get('delegated_authority_credentials','N/A')
 113                         #usr_hrn of myslice platform. used to check pi or no
 114                         account_usr_hrn_myslice = account_config.get('user_hrn','N/A')
 115
 116
 117                         if 'N/A' not in acc_user_cred:
 118                             exp_date = re.search('<expires>(.*)</expires>', acc_user_cred)
 119                             if exp_date:
 120                                 user_exp_date = exp_date.group(1)
 121                                 user_cred_exp_list.append(user_exp_date)
 122
 123                             my_users = [{'cred_exp': t[0]}
 124                                 for t in zip(user_cred_exp_list)]
 125
 126
 127                         if 'N/A' not in acc_slice_cred:
 128                             for key, value in acc_slice_cred.iteritems():
 129                                 slice_list.append(key)
 130                                 # get cred_exp date
 131                                 exp_date = re.search('<expires>(.*)</expires>', value)
 132                                 if exp_date:
 133                                     exp_date = exp_date.group(1)
 134                                     slice_cred_exp_list.append(exp_date)
 135
 136                             my_slices = [{'slice_name': t[0], 'cred_exp': t[1]}
 137                                 for t in zip(slice_list, slice_cred_exp_list)]
 138
 139                         if 'N/A' not in acc_auth_cred:
 140                             for key, value in acc_auth_cred.iteritems():
 141                                 auth_list.append(key)
 142                                 #get cred_exp date
 143                                 exp_date = re.search('<expires>(.*)</expires>', value)
 144                                 if exp_date:
 145                                     exp_date = exp_date.group(1)
 146                                     auth_cred_exp_list.append(exp_date)
 147
 148                             my_auths = [{'auth_name': t[0], 'cred_exp': t[1]}
 149                                 for t in zip(auth_list, auth_cred_exp_list)]
 150
 151                     # for reference accounts
 152                     if 'reference' in account_detail['auth_type']:
 153                         account_type = 'Reference'
 154                         delegation = 'N/A'
 155                         platform_name_secondary_list.append(platform_name)
 156                         account_type_secondary_list.append(account_type)
 157                         account_reference_list.append(account_reference)
 158                         ref_acc_list = [{'platform_name': t[0], 'account_type': t[1], 'account_reference': t[2]}
 159                             for t in zip(platform_name_secondary_list, account_type_secondary_list, account_reference_list)]
 160
 161                     elif 'managed' in account_detail['auth_type']:
 162                         account_type = 'Principal'
 163                         delegation = 'Automatic'
 164                     else:
 165                         account_type = 'Principal'
 166                         delegation = 'Manual'
 167                     # for principal (auth_type=user/managed) accounts
 168                     if 'reference' not in account_detail['auth_type']:
 169                         platform_name_list.append(platform_name)
 170                         account_type_list.append(account_type)
 171                         delegation_type_list.append(delegation)
 172                         usr_hrn_list.append(account_usr_hrn)
 173                         pub_key_list.append(account_pub_key)
 174                         user_status_list.append(user_status)
 175                         # combining 5 lists into 1 [to render in the template]
 176                         principal_acc_list = [{'platform_name': t[0], 'account_type': t[1], 'delegation_type': t[2], 'usr_hrn':t[3], 'usr_pubkey':t[4], 'user_status':t[5],}
 177                             for t in zip(platform_name_list, account_type_list, delegation_type_list, usr_hrn_list, pub_key_list, user_status_list)]
 178                     # to hide private key row if it doesn't exist
 179                     if 'myslice' in platform_detail['platform']:
 180                         account_config = json.loads(account_detail['config'])
 181                         account_priv_key = account_config.get('user_private_key','N/A')
 182                     if 'sfa' in platform_detail['gateway_type']:
 183                         platform_access = platform_detail['platform']
 184                         platform_access_list.append(platform_access)
 185
 186         # Removing the platform which already has access
 187         for platform in platform_access_list:
 188             total_platform_list.remove(platform)
 189         # we could use zip. this one is used if columns have unequal rows
 190         platform_list = [{'platform_no_access': t[0]}
 191             for t in itertools.izip_longest(total_platform_list)]
 192
 193         ## check pi or no
 194         pi_status = False
 195         pis = authority_get_pis (self.request, authority_hrn)
 196         for pi in pis:
 197             pi_list = pi['pi_users']
 198         if account_usr_hrn_myslice in pi_list:
 199             pi_status = True
 200
 201         context = super(UserView, self).get_context_data(**kwargs)
 202         context['principal_acc'] = principal_acc_list
 203         context['ref_acc'] = ref_acc_list
 204         context['platform_list'] = platform_list
 205         context['my_users'] = my_users
 206         context['my_slices'] = my_slices
 207         context['my_auths'] = my_auths
 208         context['user_status'] = user_status
 209         context['user_email']   = user_email
 210         context['firstname'] = config.get('firstname',"?")
 211         context['lastname'] = config.get('lastname',"?")
 212         context['fullname'] = context['firstname'] +' '+ context['lastname']
 213         context['authority'] = config.get('authority',"Unknown Authority")
 214         context['user_private_key'] = account_priv_key
 215         context['pi'] = pi_status
 216
 217         # XXX This is repeated in all pages
 218         # more general variables expected in the template
 219         context['title'] = 'Platforms connected to MySlice'
 220         # the menu items on the top
 221         context['topmenu_items'] = topmenu_items_live('My Account', page)
 222         # so we can sho who is logged
 223         context['username'] = the_user(self.request)
 224         context['theme'] = self.theme
 225 #        context ['firstname'] = config['firstname']
 226         prelude_env = page.prelude_env()
 227         context.update(prelude_env)
 228         return context
 229
 230
 231 @login_required
 232 #my_acc form value processing
 233 def user_process(request, **kwargs):
 234
 235     for key, value in kwargs.iteritems():
 236         if key == "email":
 237             selected_email=value
 238
 239     redirect_url = "/portal/user/"+selected_email
 240
 241     user_query  = Query().get('local:user').filter_by('email', '==', selected_email).select('user_id','email','password','config')
 242     user_details = execute_admin_query(request, user_query)
 243
 244     # getting the user_id from the session
 245     for user_detail in user_details:
 246         user_id = user_detail['user_id']
 247         user_email = user_detail['email']
 248
 249     account_query  = Query().get('local:account').filter_by('user_id', '==', user_id).select('user_id','platform_id','auth_type','config')
 250     account_details = execute_admin_query(request, account_query)
 251
 252     platform_query  = Query().get('local:platform').select('platform_id','platform')
 253     platform_details = execute_admin_query(request, platform_query)
 254
 255
 256     for account_detail in account_details:
 257         for platform_detail in platform_details:
 258             # Add reference account to the platforms
 259             if 'add_'+platform_detail['platform'] in request.POST:
 260                 platform_id = platform_detail['platform_id']
 261                 user_params = {'platform_id': platform_id, 'user_id': user_id, 'auth_type': "reference", 'config': '{"reference_platform": "myslice"}'}
 262                 manifold_add_account(request, user_params)
 263                 messages.info(request, 'Reference Account is added to the selected platform successfully!')
 264                 return HttpResponseRedirect(redirect_url)
 265
 266             # Delete reference account from the platforms
 267             if 'delete_'+platform_detail['platform'] in request.POST:
 268                 platform_id = platform_detail['platform_id']
 269                 user_params = {'user_id':user_id}
 270                 manifold_delete_account(request, platform_id, user_id, user_params)
 271                 messages.info(request, 'Refeence Account is removed from the selected platform')
 272                 return HttpResponseRedirect(redirect_url)
 273
 274             if platform_detail['platform_id'] == account_detail['platform_id']:
 275                 if 'myslice' in platform_detail['platform']:
 276                     account_config = json.loads(account_detail['config'])
 277                     acc_slice_cred = account_config.get('delegated_slice_credentials','N/A')
 278                     acc_auth_cred = account_config.get('delegated_authority_credentials','N/A')
 279
 280                     # adding the slices and corresponding credentials to list
 281                     if 'N/A' not in acc_slice_cred:
 282                         slice_list = []
 283                         slice_cred = []
 284                         for key, value in acc_slice_cred.iteritems():
 285                             slice_list.append(key)
 286                             slice_cred.append(value)
 287                         # special case: download each slice credentials separately
 288                         for i in range(0, len(slice_list)):
 289                             if 'dl_'+slice_list[i] in request.POST:
 290                                 slice_detail = "Slice name: " + slice_list[i] +"\nSlice Credentials: \n"+ slice_cred[i]
 291                                 response = HttpResponse(slice_detail, content_type='text/plain')
 292                                 response['Content-Disposition'] = 'attachment; filename="slice_credential.txt"'
 293                                 return response
 294
 295                     # adding the authority and corresponding credentials to list
 296                     if 'N/A' not in acc_auth_cred:
 297                         auth_list = []
 298                         auth_cred = []
 299                         for key, value in acc_auth_cred.iteritems():
 300                             auth_list.append(key)
 301                             auth_cred.append(value)
 302                         # special case: download each slice credentials separately
 303                         for i in range(0, len(auth_list)):
 304                             if 'dl_'+auth_list[i] in request.POST:
 305                                 auth_detail = "Authority: " + auth_list[i] +"\nAuthority Credentials: \n"+ auth_cred[i]
 306                                 response = HttpResponse(auth_detail, content_type='text/plain')
 307                                 response['Content-Disposition'] = 'attachment; filename="auth_credential.txt"'
 308                                 return response
 309
 310     if 'submit_name' in request.POST:
 311         edited_first_name =  request.POST['fname']
 312         edited_last_name =  request.POST['lname']
 313
 314         config={}
 315         for user_config in user_details:
 316             if user_config['config']:
 317                 config = json.loads(user_config['config'])
 318                 config['firstname'] = edited_first_name
 319                 config['lastname'] = edited_last_name
 320                 config['authority'] = config.get('authority','Unknown Authority')
 321                 updated_config = json.dumps(config)
 322                 user_params = {'config': updated_config}
 323             else: # it's needed if the config is empty
 324                 user_config['config']= '{"firstname":"' + edited_first_name + '", "lastname":"'+ edited_last_name + '", "authority": "Unknown Authority"}'
 325                 user_params = {'config': user_config['config']}
 326         # updating config local:user in manifold
 327         manifold_update_user(request, user_email, user_params)
 328         # this will be depricated, we will show the success msg in same page
 329         # Redirect to same page with success message
 330         messages.success(request, 'Sucess: First Name and Last Name Updated.')
 331         return HttpResponseRedirect(redirect_url)
 332
 333     elif 'submit_auth' in request.POST:
 334         edited_auth = request.POST['authority']
 335
 336         config={}
 337         for user_config in user_details:
 338             if user_config['config']:
 339                 config = json.loads(user_config['config'])
 340                 config['firstname'] = config.get('firstname', 'N/A')
 341                 config['lastname'] = config.get('lastname','N/A')
 342                 config['authority'] = edited_auth
 343                 updated_config = json.dumps(config)
 344                 user_params = {'config': updated_config}
 345             else: # it's needed if the config is empty
 346                 user_config['config']= '{"firstname": "N/A", "lastname":"N/A", "authority":"' + edited_auth + '"}'
 347                 user_params = {'config': user_config['config']}
 348         # updating config local:user in manifold
 349         manifold_update_user(request, user_email, user_params)
 350         # this will be depricated, we will show the success msg in same page
 351         # Redirect to same page with success message
 352         messages.success(request, 'Sucess: Authority Updated.')
 353         return HttpResponseRedirect(redirect_url)
 354
 355 # XXX TODO: Factorize with portal/registrationview.py
 356
 357     elif 'generate' in request.POST:
 358         for account_detail in account_details:
 359             for platform_detail in platform_details:
 360                 if platform_detail['platform_id'] == account_detail['platform_id']:
 361                     if 'myslice' in platform_detail['platform']:
 362                         from Crypto.PublicKey import RSA
 363                         private = RSA.generate(1024)
 364                         private_key = json.dumps(private.exportKey())
 365                         public  = private.publickey()
 366                         public_key = json.dumps(public.exportKey(format='OpenSSH'))
 367                         # updating manifold local:account table
 368                         account_config = json.loads(account_detail['config'])
 369                         # preserving user_hrn
 370                         user_hrn = account_config.get('user_hrn','N/A')
 371                         keypair = '{"user_public_key":'+ public_key + ', "user_private_key":'+ private_key + ', "user_hrn":"'+ user_hrn + '"}'
 372                         updated_config = json.dumps(account_config)
 373                         # updating manifold
 374                         user_params = { 'config': keypair, 'auth_type':'managed'}
 375                         manifold_update_account(request, user_id, user_params)
 376                         # updating sfa
 377                         #public_key = public_key.replace('"', '');
 378                         #user_pub_key = {'keys': public_key}
 379                         #sfa_update_user(request, user_hrn, user_pub_key)
 380                         messages.success(request, 'Sucess: New Keypair Generated! Delegation of your credentials will be automatic.')
 381                         return HttpResponseRedirect(redirect_url)
 382         else:
 383             messages.error(request, 'Account error: You need an account in myslice platform to perform this action')
 384             return HttpResponseRedirect(redirect_url)
 385
 386     elif 'upload_key' in request.POST:
 387         for account_detail in account_details:
 388             for platform_detail in platform_details:
 389                 if platform_detail['platform_id'] == account_detail['platform_id']:
 390                     if 'myslice' in platform_detail['platform']:
 391                         up_file = request.FILES['pubkey']
 392                         file_content =  up_file.read()
 393                         file_name = up_file.name
 394                         file_extension = os.path.splitext(file_name)[1]
 395                         allowed_extension =  ['.pub','.txt']
 396                         if file_extension in allowed_extension and re.search(r'ssh-rsa',file_content):
 397                             account_config = json.loads(account_detail['config'])
 398                             # preserving user_hrn
 399                             user_hrn = account_config.get('user_hrn','N/A')
 400                             file_content = '{"user_public_key":"'+ file_content + '", "user_hrn":"'+ user_hrn +'"}'
 401                             #file_content = re.sub("\r", "", file_content)
 402                             #file_content = re.sub("\n", "\\n",file_content)
 403                             file_content = ''.join(file_content.split())
 404                             #update manifold local:account table
 405                             user_params = { 'config': file_content, 'auth_type':'user'}
 406                             manifold_update_account(request,user_id,user_params)
 407                             # updating sfa
 408                             #user_pub_key = {'keys': file_content}
 409                             #sfa_update_user(request, user_hrn, user_pub_key)
 410                             messages.success(request, 'Publickey uploaded! Please delegate your credentials using SFA: http://trac.myslice.info/wiki/DelegatingCredentials')
 411                             return HttpResponseRedirect(redirect_url)
 412                         else:
 413                             messages.error(request, 'RSA key error: Please upload a valid RSA public key [.txt or .pub].')
 414                             return HttpResponseRedirect(redirect_url)
 415         else:
 416             messages.error(request, 'Account error: You need an account in myslice platform to perform this action')
 417             return HttpResponseRedirect(redirect_url)
 418
 419     elif 'dl_pubkey' in request.POST:
 420         for account_detail in account_details:
 421             for platform_detail in platform_details:
 422                 if platform_detail['platform_id'] == account_detail['platform_id']:
 423                     if 'myslice' in platform_detail['platform']:
 424                         account_config = json.loads(account_detail['config'])
 425                         public_key = account_config['user_public_key']
 426                         response = HttpResponse(public_key, content_type='text/plain')
 427                         response['Content-Disposition'] = 'attachment; filename="pubkey.txt"'
 428                         return response
 429                         break
 430         else:
 431             messages.error(request, 'Account error: You need an account in myslice platform to perform this action')
 432             return HttpResponseRedirect(redirect_url)
 433
 434     elif 'dl_pkey' in request.POST:
 435         for account_detail in account_details:
 436             for platform_detail in platform_details:
 437                 if platform_detail['platform_id'] == account_detail['platform_id']:
 438                     if 'myslice' in platform_detail['platform']:
 439                         account_config = json.loads(account_detail['config'])
 440                         if 'user_private_key' in account_config:
 441                             private_key = account_config['user_private_key']
 442                             response = HttpResponse(private_key, content_type='text/plain')
 443                             response['Content-Disposition'] = 'attachment; filename="privkey.txt"'
 444                             return response
 445                         else:
 446                             messages.error(request, 'Download error: Private key is not stored in the server')
 447                             return HttpResponseRedirect(redirect_url)
 448
 449         else:
 450             messages.error(request, 'Account error: You need an account in myslice platform to perform this action')
 451             return HttpResponseRedirect(redirect_url)
 452
 453 #    elif 'delete' in request.POST:
 454 #        for account_detail in account_details:
 455 #            for platform_detail in platform_details:
 456 #                if platform_detail['platform_id'] == account_detail['platform_id']:
 457 #                    if 'myslice' in platform_detail['platform']:
 458 #                        account_config = json.loads(account_detail['config'])
 459 #                        if 'user_private_key' in account_config:
 460 #                            for key in account_config.keys():
 461 #                                if key == 'user_private_key':
 462 #                                    del account_config[key]
 463 #
 464 #                            updated_config = json.dumps(account_config)
 465 #                            user_params = { 'config': updated_config, 'auth_type':'user'}
 466 #                            manifold_update_account(request,user_params)
 467 #                            messages.success(request, 'Private Key deleted. You need to delegate credentials manually once it expires.')
 468 #                            messages.success(request, 'Once your credentials expire, Please delegate manually using SFA: http://trac.myslice.info/wiki/DelegatingCredentials')
 469 #                            return HttpResponseRedirect("/portal/account/")
 470 #                        else:
 471 #                            messages.error(request, 'Delete error: Private key is not stored in the server')
 472 #                            return HttpResponseRedirect(redirect_url)
 473 #
 474 #        else:
 475 #            messages.error(request, 'Account error: You need an account in myslice platform to perform this action')
 476 #            return HttpResponseRedirect(redirect_url)
 477
 478     #clear all creds
 479     elif 'clear_cred' in request.POST:
 480         clear_user_creds(request, user_email)
 481         messages.success(request, 'All Credentials cleared')
 482         return HttpResponseRedirect(redirect_url)
 483
 484     #make a user PI
 485     elif 'makepi' in request.POST:
 486         # getting user's authority_hrn
 487         config={}
 488         for user_config in user_details:
 489             if user_config['config']:
 490                 user_config = json.loads(user_config['config'])
 491                 authority_hrn = user_config.get('authority','Unknown Authority')
 492
 493         #getting user_hrn
 494         for account_detail in account_details:
 495             for platform_detail in platform_details:
 496                 if platform_detail['platform_id'] == account_detail['platform_id']:
 497                     if 'myslice' in platform_detail['platform']:
 498                         account_config = json.loads(account_detail['config'])
 499                         user_hrn = account_config.get('user_hrn','N/A')
 500
 501         authority_add_pis(request, authority_hrn, user_hrn)
 502         clear_user_creds(request, user_email)
 503         messages.success(request, 'User upgraded to PI')
 504         return HttpResponseRedirect(redirect_url)
 505
 506     elif 'removepi' in request.POST:
 507         # getting user's authority_hrn
 508         config={}
 509         for user_config in user_details:
 510             if user_config['config']:
 511                 user_config = json.loads(user_config['config'])
 512                 authority_hrn = user_config.get('authority','Unknown Authority')
 513         #getting user_hrn
 514         for account_detail in account_details:
 515             for platform_detail in platform_details:
 516                 if platform_detail['platform_id'] == account_detail['platform_id']:
 517                     if 'myslice' in platform_detail['platform']:
 518                         account_config = json.loads(account_detail['config'])
 519                         user_hrn = account_config.get('user_hrn','N/A')
 520         authority_remove_pis(request, authority_hrn, user_hrn)
 521         clear_user_creds(request, user_email)
 522         messages.success(request, 'PI downgraded to user')
 523         return HttpResponseRedirect(redirect_url)
 524
 525
 526
 527     # Download delegated_user_cred
 528     elif 'dl_user_cred' in request.POST:
 529         if 'delegated_user_credential' in account_config:
 530             user_cred = account_config['delegated_user_credential']
 531             response = HttpResponse(user_cred, content_type='text/plain')
 532             response['Content-Disposition'] = 'attachment; filename="user_cred.txt"'
 533             return response
 534         else:
 535             messages.error(request, 'Download error: User credential  is not stored in the server')
 536             return HttpResponseRedirect(redirect_url)
 537
 538     else:
 539         messages.info(request, 'Under Construction. Please try again later!')
 540         return HttpResponseRedirect(redirect_url)
 541
 542