# -*- coding: utf-8 -*- # Copyright (C) 1998-2017 by the Free Software Foundation, Inc. # # This file is part of Postorius. # # Postorius is free software: you can redistribute it and/or modify it under # the terms of the GNU General Public License as published by the Free # Software Foundation, either version 3 of the License, or (at your option) # any later version. # # Postorius is distributed in the hope that it will be useful, but WITHOUT # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for # more details. # # You should have received a copy of the GNU General Public License along with # Postorius. If not, see <http://www.gnu.org/licenses/>. from __future__ import absolute_import, unicode_literals import csv import email.utils import logging from allauth.account.models import EmailAddress from django.http import HttpResponse, HttpResponseNotAllowed, Http404 from django.conf import settings from django.contrib import messages from django.contrib.auth.decorators import login_required from django.core.urlresolvers import reverse from django.core.validators import validate_email from django.forms import formset_factory from django.shortcuts import render, redirect from django.core.exceptions import ValidationError from django.utils.decorators import method_decorator from django.utils.translation import gettext as _ from django_mailman3.lib.mailman import get_mailman_client from django_mailman3.lib.paginator import paginate, MailmanPaginator from django.utils.six.moves.urllib.error import HTTPError from postorius.forms import ( ListNew, MemberForm, ListSubscribe, MultipleChoiceForm, UserPreferences, ListSubscriptionPolicyForm, ArchiveSettingsForm, MessageAcceptanceForm, DigestSettingsForm, AlterMessagesForm, ListAutomaticResponsesForm, ListIdentityForm, ListMassSubscription, ListMassRemoval, ListAddBanForm, ListHeaderMatchForm, ListHeaderMatchFormset, MemberModeration, DMARCMitigationsForm, ListAnonymousSubscribe) from postorius.models import Domain, List, Mailman404Error from postorius.auth.decorators import ( list_owner_required, list_moderator_required, superuser_required) from postorius.views.generic import MailingListView logger = logging.getLogger(__name__) @login_required @list_owner_required def list_members_view(request, list_id, role=None): """Display all members of a given list.""" if role not in ['owner', 'moderator', 'subscriber']: return redirect('list_members', list_id, 'subscriber') mailing_list = List.objects.get_or_404(fqdn_listname=list_id) if request.method == 'POST': if role == 'subscriber': form = MultipleChoiceForm(request.POST) if form.is_valid(): members = form.cleaned_data['choices'] for member in members: mailing_list.unsubscribe(member) messages.success(request, _('The selected members' ' have been unsubscribed')) return redirect('list_members', list_id, role) else: member_form = MemberForm(request.POST) if member_form.is_valid(): try: getattr(mailing_list, 'add_%s' % role)( member_form.cleaned_data['email']) messages.success( request, _('%(email)s has been added' ' with the role %(role)s') % {'email': member_form.cleaned_data['email'], 'role': role}) return redirect('list_members', list_id, role) except HTTPError as e: messages.error(request, _(e.msg)) else: form = MultipleChoiceForm() member_form = MemberForm() context = { 'list': mailing_list, 'role': role, } if role == 'subscriber': context['page_title'] = _('List subscribers') if request.GET.get('q'): query = context['query'] = request.GET['q'] if "*" not in query: query = '*{}*'.format(query) # Proxy the find_members method to insert the query def find_method(count, page): return mailing_list.find_members(query, count=count, page=page) else: find_method = mailing_list.get_member_page context['members'] = paginate( find_method, request.GET.get('page'), request.GET.get('count', 25), paginator_class=MailmanPaginator) if mailing_list.member_count == 0: context['empty_error'] = _('List has no Subscribers') else: context['empty_error'] =\ _('No member was found matching the search') context['form'] = form else: context['member_form'] = member_form if role == 'owner': context['page_title'] = _('List owners') context['members'] = mailing_list.owners context['form_action'] = _('Add owner') elif role == 'moderator': context['page_title'] = _('List moderators') context['members'] = mailing_list.moderators context['empty_error'] = _('List has no moderators') context['form_action'] = _('Add moderator') return render(request, 'postorius/lists/members.html', context) @login_required @list_owner_required def list_member_options(request, list_id, email): template_name = 'postorius/lists/memberoptions.html' client = get_mailman_client() mm_list = List.objects.get_or_404(fqdn_listname=list_id) try: mm_member = client.get_member(list_id, email) member_prefs = mm_member.preferences except ValueError: raise Http404(_('Member does not exist')) except Mailman404Error: return render(request, template_name, {'nolists': 'true'}) initial_moderation = dict([ (key, getattr(mm_member, key)) for key in MemberModeration.base_fields ]) if request.method == 'POST': if request.POST.get("formname") == 'preferences': moderation_form = MemberModeration(initial=initial_moderation) preferences_form = UserPreferences( request.POST, initial=member_prefs) if preferences_form.is_valid(): if not preferences_form.has_changed(): messages.info(request, _("No change to the member's preferences.")) return redirect('list_member_options', list_id, email) for key in preferences_form.fields.keys(): member_prefs[key] = preferences_form.cleaned_data[key] try: member_prefs.save() except HTTPError as e: messages.error(request, e.msg) else: messages.success(request, _("The member's preferences have" " been updated.")) return redirect('list_member_options', list_id, email) elif request.POST.get("formname") == 'moderation': preferences_form = UserPreferences(initial=member_prefs) moderation_form = MemberModeration( request.POST, initial=initial_moderation) if moderation_form.is_valid(): if not moderation_form.has_changed(): messages.info(request, _("No change to the member's moderation.")) return redirect('list_member_options', list_id, email) for key in moderation_form.fields.keys(): setattr(mm_member, key, moderation_form.cleaned_data[key]) try: mm_member.save() except HTTPError as e: messages.error(request, e.msg) else: messages.success(request, _("The member's moderation " "settings have been updated.")) return redirect('list_member_options', list_id, email) else: preferences_form = UserPreferences(initial=member_prefs) moderation_form = MemberModeration(initial=initial_moderation) return render(request, template_name, { 'mm_member': mm_member, 'list': mm_list, 'preferences_form': preferences_form, 'moderation_form': moderation_form, }) class ListSummaryView(MailingListView): """Shows common list metrics. """ def get(self, request, list_id): data = {'list': self.mailing_list, 'user_subscribed': False, 'subscribed_address': None, 'public_archive': False, 'hyperkitty_enabled': False} if self.mailing_list.settings['archive_policy'] == 'public': data['public_archive'] = True if getattr(settings, 'TESTING', False) and \ 'hyperkitty' not in settings.INSTALLED_APPS: # avoid systematic test failure when HyperKitty is installed # (missing VCR request, see below). list(self.mailing_list.archivers) if ('hyperkitty' in settings.INSTALLED_APPS and 'hyperkitty' in self.mailing_list.archivers and self.mailing_list.archivers['hyperkitty']): data['hyperkitty_enabled'] = True if request.user.is_authenticated(): user_emails = EmailAddress.objects.filter( user=request.user, verified=True).order_by( "email").values_list("email", flat=True) pending_requests = [r['email'] for r in self.mailing_list.requests] for address in user_emails: if address in pending_requests: data['user_request_pending'] = True break try: self.mailing_list.get_member(address) except ValueError: pass else: data['user_subscribed'] = True data['subscribed_address'] = address break # no need to test more addresses data['subscribe_form'] = ListSubscribe(user_emails) else: user_emails = None data['anonymous_subscription_form'] = ListAnonymousSubscribe() return render(request, 'postorius/lists/summary.html', data) class ChangeSubscriptionView(MailingListView): """Change mailing list subscription """ @method_decorator(login_required) def post(self, request, list_id): try: user_emails = EmailAddress.objects.filter( user=request.user, verified=True).order_by( "email").values_list("email", flat=True) form = ListSubscribe(user_emails, request.POST) # Find the currently subscribed email old_email = None for address in user_emails: try: self.mailing_list.get_member(address) except ValueError: pass else: old_email = address break # no need to test more addresses assert old_email is not None if form.is_valid(): email = form.cleaned_data['email'] if old_email == email: messages.error(request, _('You are already subscribed')) else: self.mailing_list.unsubscribe(old_email) # Since the action is done via the web UI, no email # confirmation is needed. response = self.mailing_list.subscribe( email, pre_confirmed=True) if (type(response) == dict and response.get('token_owner') == 'moderator'): messages.success( request, _('Your request to change the email for' ' this subscription was submitted and' ' is waiting for moderator approval.')) else: messages.success(request, _('Subscription changed to %s') % email) else: messages.error(request, _('Something went wrong. Please try again.')) except HTTPError as e: messages.error(request, e.msg) return redirect('list_summary', self.mailing_list.list_id) class ListSubscribeView(MailingListView): """ view name: `list_subscribe` """ @method_decorator(login_required) def post(self, request, list_id): """ Subscribes an email address to a mailing list via POST and redirects to the `list_summary` view. """ try: user_emails = EmailAddress.objects.filter( user=request.user, verified=True).order_by( "email").values_list("email", flat=True) form = ListSubscribe(user_emails, request.POST) if form.is_valid(): email = request.POST.get('email') response = self.mailing_list.subscribe( email, pre_verified=True, pre_confirmed=True) if (type(response) == dict and response.get('token_owner') == 'moderator'): messages.success( request, _('Your subscription request has been' ' submitted and is waiting for moderator' ' approval.')) else: messages.success(request, _('You are subscribed to %s.') % self.mailing_list.fqdn_listname) else: messages.error(request, _('Something went wrong. Please try again.')) except HTTPError as e: messages.error(request, e.msg) return redirect('list_summary', self.mailing_list.list_id) class ListAnonymousSubscribeView(MailingListView): """ view name: `list_anonymous_subscribe` """ def post(self, request, list_id): """ Subscribes an email address to a mailing list via POST and redirects to the `list_summary` view. This view is used for unauthenticated users and asks Mailman core to verify the supplied email address. """ try: form = ListAnonymousSubscribe(request.POST) if form.is_valid(): email = form.cleaned_data.get('email') self.mailing_list.subscribe(email, pre_verified=False, pre_confirmed=False) messages.success(request, _('Please check your inbox for ' 'further instructions')) else: messages.error(request, _('Something went wrong. Please try again.')) except HTTPError as e: messages.error(request, e.msg) return redirect('list_summary', self.mailing_list.list_id) class ListUnsubscribeView(MailingListView): """Unsubscribe from a mailing list.""" @method_decorator(login_required) def post(self, request, *args, **kwargs): email = request.POST['email'] try: self.mailing_list.unsubscribe(email) messages.success(request, _('%s has been unsubscribed' ' from this list.') % email) except ValueError as e: messages.error(request, e) return redirect('list_summary', self.mailing_list.list_id) @login_required @list_owner_required def list_mass_subscribe(request, list_id): mailing_list = List.objects.get_or_404(fqdn_listname=list_id) if request.method == 'POST': form = ListMassSubscription(request.POST) if form.is_valid(): for data in form.cleaned_data['emails']: try: # Parse the data to get the address and the display name display_name, address = email.utils.parseaddr(data) validate_email(address) mailing_list.subscribe(address=address, display_name=display_name, pre_verified=True, pre_confirmed=True, pre_approved=True) messages.success( request, _('The address %(address)s has been' ' subscribed to %(list)s.') % {'address': address, 'list': mailing_list.fqdn_listname}) except HTTPError as e: messages.error(request, e) except ValidationError: messages.error(request, _('The email address %s' ' is not valid.') % address) else: form = ListMassSubscription() return render(request, 'postorius/lists/mass_subscribe.html', {'form': form, 'list': mailing_list}) class ListMassRemovalView(MailingListView): """Class For Mass Removal""" @method_decorator(login_required) @method_decorator(list_owner_required) def get(self, request, *args, **kwargs): form = ListMassRemoval() return render(request, 'postorius/lists/mass_removal.html', {'form': form, 'list': self.mailing_list}) @method_decorator(list_owner_required) def post(self, request, *args, **kwargs): form = ListMassRemoval(request.POST) if not form.is_valid(): messages.error(request, _('Please fill out the form correctly.')) else: for address in form.cleaned_data['emails']: try: validate_email(address) self.mailing_list.unsubscribe(address.lower()) messages.success( request, _('The address %(address)s has been' ' unsubscribed from %(list)s.') % {'address': address, 'list': self.mailing_list.fqdn_listname}) except (HTTPError, ValueError) as e: messages.error(request, e) except ValidationError: messages.error(request, _('The email address %s' ' is not valid.') % address) return redirect('mass_removal', self.mailing_list.list_id) def _perform_action(message_ids, action): for message_id in message_ids: action(message_id) @login_required @list_moderator_required def list_moderation(request, list_id, held_id=-1): mailing_list = List.objects.get_or_404(fqdn_listname=list_id) if request.method == 'POST': form = MultipleChoiceForm(request.POST) if form.is_valid(): message_ids = form.cleaned_data['choices'] try: if 'accept' in request.POST: _perform_action(message_ids, mailing_list.accept_message) messages.success(request, _('The selected messages were accepted')) elif 'reject' in request.POST: _perform_action(message_ids, mailing_list.reject_message) messages.success(request, _('The selected messages were rejected')) elif 'discard' in request.POST: _perform_action(message_ids, mailing_list.discard_message) messages.success(request, _('The selected messages were discarded')) except HTTPError: messages.error(request, _('Message could not be found')) else: form = MultipleChoiceForm() held_messages = paginate( mailing_list.get_held_page, request.GET.get('page'), request.GET.get('count'), paginator_class=MailmanPaginator) context = { 'list': mailing_list, 'held_messages': held_messages, 'form': form, } return render(request, 'postorius/lists/held_messages.html', context) @login_required @list_moderator_required def moderate_held_message(request, list_id): if request.method != 'POST': return HttpResponseNotAllowed(['POST']) msg_id = request.POST['msgid'] mailing_list = List.objects.get_or_404(fqdn_listname=list_id) if 'accept' in request.POST: mailing_list.accept_message(msg_id) messages.success(request, _('The message was accepted')) elif 'reject' in request.POST: mailing_list.reject_message(msg_id) messages.success(request, _('The message was rejected')) elif 'discard' in request.POST: mailing_list.discard_message(msg_id) messages.success(request, _('The message was discarded')) return redirect('list_held_messages', list_id) @login_required @list_owner_required def csv_view(request, list_id): """Export all the subscriber in csv """ mm_lists = List.objects.get_or_404(fqdn_listname=list_id) response = HttpResponse(content_type='text/csv') response['Content-Disposition'] = ( 'attachment; filename="Subscribers.csv"') writer = csv.writer(response) if mm_lists: for i in mm_lists.members: writer.writerow([i.email]) return response def _get_choosable_domains(request): domains = Domain.objects.all() return [(d.mail_host, d.mail_host) for d in domains] @login_required @superuser_required def list_new(request, template='postorius/lists/new.html'): """ Add a new mailing list. If the request to the function is a GET request an empty form for creating a new list will be displayed. If the request method is POST the form will be evaluated. If the form is considered correct the list gets created and otherwise the form with the data filled in before the last POST request is returned. The user must be logged in to create a new list. """ mailing_list = None choosable_domains = [('', _('Choose a Domain'))] choosable_domains += _get_choosable_domains(request) if request.method == 'POST': form = ListNew(choosable_domains, request.POST) if form.is_valid(): # grab domain domain = Domain.objects.get_or_404( mail_host=form.cleaned_data['mail_host']) # creating the list try: mailing_list = domain.create_list( form.cleaned_data['listname']) mailing_list.add_owner(form.cleaned_data['list_owner']) list_settings = mailing_list.settings if form.cleaned_data['description']: list_settings["description"] = \ form.cleaned_data['description'] list_settings["advertised"] = form.cleaned_data['advertised'] list_settings.save() messages.success(request, _("List created")) return redirect("list_summary", list_id=mailing_list.list_id) # TODO catch correct Error class: except HTTPError as e: return render(request, 'postorius/errors/generic.html', {'error': e}) else: messages.error(request, _('Please check the errors below')) else: form = ListNew(choosable_domains, initial={ 'list_owner': request.user.email, 'advertised': True, }) return render(request, template, {'form': form}) def list_index(request, template='postorius/index.html'): """Show a table of all public mailing lists. """ if request.method == 'POST': return redirect("list_summary", list_id=request.POST["list"]) def _get_list_page(count, page): client = get_mailman_client() advertised = not request.user.is_superuser return client.get_list_page( advertised=advertised, count=count, page=page) lists = paginate( _get_list_page, request.GET.get('page'), request.GET.get('count'), paginator_class=MailmanPaginator) choosable_domains = _get_choosable_domains(request) return render(request, template, {'lists': lists, 'domain_count': len(choosable_domains)}) @login_required @list_owner_required def list_delete(request, list_id): """Deletes a list but asks for confirmation first. """ the_list = List.objects.get_or_404(fqdn_listname=list_id) if request.method == 'POST': the_list.delete() return redirect("list_index") else: submit_url = reverse('list_delete', kwargs={'list_id': list_id}) cancel_url = reverse('list_index',) return render(request, 'postorius/lists/confirm_delete.html', {'submit_url': submit_url, 'cancel_url': cancel_url, 'list': the_list}) @login_required @list_moderator_required def list_subscription_requests(request, list_id): """Shows a list of held messages. """ m_list = List.objects.get_or_404(fqdn_listname=list_id) return render(request, 'postorius/lists/subscription_requests.html', {'list': m_list}) @login_required @list_moderator_required def handle_subscription_request(request, list_id, request_id, action): """ Handle a subscription request. Possible actions: - accept - defer - reject - discard """ confirmation_messages = { 'accept': _('The request has been accepted.'), 'reject': _('The request has been rejected.'), 'discard': _('The request has been discarded.'), 'defer': _('The request has been defered.'), } try: m_list = List.objects.get_or_404(fqdn_listname=list_id) # Moderate request and add feedback message to session. m_list.moderate_request(request_id, action) messages.success(request, confirmation_messages[action]) except HTTPError as e: if e.code == 409: messages.success(request, _('The request was already moderated: %s') % e.reason) else: messages.error(request, _('The request could not be moderated: %s') % e.reason) return redirect('list_subscription_requests', m_list.list_id) SETTINGS_SECTION_NAMES = ( ('list_identity', _('List Identity')), ('automatic_responses', _('Automatic Responses')), ('alter_messages', _('Alter Messages')), ('dmarc_mitigations', _('DMARC Mitigations')), ('digest', _('Digest')), ('message_acceptance', _('Message Acceptance')), ('archiving', _('Archiving')), ('subscription_policy', _('Subscription Policy')), ) SETTINGS_FORMS = { 'list_identity': ListIdentityForm, 'automatic_responses': ListAutomaticResponsesForm, 'alter_messages': AlterMessagesForm, 'dmarc_mitigations': DMARCMitigationsForm, 'digest': DigestSettingsForm, 'message_acceptance': MessageAcceptanceForm, 'archiving': ArchiveSettingsForm, 'subscription_policy': ListSubscriptionPolicyForm, } @login_required @list_owner_required def list_settings(request, list_id=None, visible_section=None, template='postorius/lists/settings.html'): """ View and edit the settings of a list. The function requires the user to be logged in and have the permissions necessary to perform the action. Use /<NAMEOFTHESECTION>/<NAMEOFTHEOPTION> to show only parts of the settings <param> is optional / is used to differ in between section and option might result in using //option """ if visible_section is None: visible_section = 'list_identity' try: form_class = SETTINGS_FORMS[visible_section] except KeyError: raise Http404('No such settings section') m_list = List.objects.get_or_404(fqdn_listname=list_id) list_settings = m_list.settings initial_data = dict( (key, unicode(value)) for key, value in list_settings.items()) # List settings are grouped an processed in different forms. if request.method == 'POST': form = form_class(request.POST, mlist=m_list, initial=initial_data) if form.is_valid(): try: for key in form.changed_data: if key in form_class.mlist_properties: setattr(m_list, key, form.cleaned_data[key]) else: list_settings[key] = form.cleaned_data[key] list_settings.save() messages.success(request, _('The settings have been updated.')) except HTTPError as e: messages.error(request, _('An error occured: %s') % e.reason) return redirect('list_settings', m_list.list_id, visible_section) else: form = form_class(initial=initial_data, mlist=m_list) return render(request, template, { 'form': form, 'section_names': SETTINGS_SECTION_NAMES, 'list': m_list, 'visible_section': visible_section, }) @login_required @list_owner_required def remove_role(request, list_id=None, role=None, address=None, template='postorius/lists/confirm_remove_role.html'): """Removes a list moderator or owner.""" the_list = List.objects.get_or_404(fqdn_listname=list_id) redirect_on_success = redirect('list_members', the_list.list_id, role) roster = getattr(the_list, '{}s'.format(role)) if address not in roster: messages.error(request, _('The user %(email)s is not in the %(role)s group') % {'email': address, 'role': role}) return redirect('list_members', the_list.list_id, role) if role == 'owner': if len(roster) == 1: messages.error(request, _('Removing the last owner is impossible')) return redirect('list_members', the_list.list_id, role) user_emails = EmailAddress.objects.filter( user=request.user, verified=True).order_by( "email").values_list("email", flat=True) if address in user_emails: # The user is removing themselves, redirect to the list info page # because they won't have access to the members page anyway. redirect_on_success = redirect('list_summary', the_list.list_id) if request.method == 'POST': try: the_list.remove_role(role, address) except HTTPError as e: messages.error(request, _('The user could not be removed: %(msg)s') % {'msg': e.msg}) return redirect('list_members', the_list.list_id, role) messages.success(request, _('The user %(address)s has been removed' ' from the %(role)s group.') % {'address': address, 'role': role}) return redirect_on_success return render(request, template, {'role': role, 'address': address, 'list_id': the_list.list_id}) @login_required @list_owner_required def remove_all_subscribers(request, list_id): """Empty the list by unsubscribing all members.""" mlist = List.objects.get_or_404(fqdn_listname=list_id) if len(mlist.members) == 0: messages.error(request, _('No member is subscribed to the list currently.')) return redirect('mass_removal', mlist.list_id) if request.method == 'POST': try: for names in mlist.members: mlist.unsubscribe(names.email) messages.success(request, _('All members have been' ' unsubscribed from the list.')) return redirect('list_members', mlist.list_id) except Exception as e: messages.error(request, e) return render(request, 'postorius/lists/confirm_removeall_subscribers.html', {'list': mlist}) @login_required @list_owner_required def list_bans(request, list_id): """ Ban or unban email addresses. """ # Get the list and cache the archivers property. m_list = List.objects.get_or_404(fqdn_listname=list_id) ban_list = m_list.bans # Process form submission. if request.method == 'POST': if 'add' in request.POST: addban_form = ListAddBanForm(request.POST) if addban_form.is_valid(): try: ban_list.add(addban_form.cleaned_data['email']) messages.success(request, _( 'The email {} has been banned.'.format( addban_form.cleaned_data['email']))) except HTTPError as e: messages.error( request, _('An error occured: %s') % e.reason) except ValueError as e: messages.error(request, _('Invalid data: %s') % e) return redirect('list_bans', list_id) elif 'del' in request.POST: try: ban_list.remove(request.POST['email']) messages.success(request, _( 'The email {} has been un-banned'.format( request.POST['email']))) except HTTPError as e: messages.error(request, _('An error occured: %s') % e.reason) except ValueError as e: messages.error(request, _('Invalid data: %s') % e) return redirect('list_bans', list_id) else: addban_form = ListAddBanForm() banned_addresses = paginate( list(ban_list), request.GET.get('page'), request.GET.get('count')) return render(request, 'postorius/lists/bans.html', {'list': m_list, 'addban_form': addban_form, 'banned_addresses': banned_addresses, }) @login_required @list_owner_required def list_header_matches(request, list_id): """ View and edit the list's header matches. """ m_list = List.objects.get_or_404(fqdn_listname=list_id) header_matches = m_list.header_matches HeaderMatchFormset = formset_factory( ListHeaderMatchForm, extra=1, can_delete=True, can_order=True, formset=ListHeaderMatchFormset) initial_data = [ dict([ (key, getattr(hm, key)) for key in ListHeaderMatchForm.base_fields ]) for hm in header_matches] # Process form submission. if request.method == 'POST': formset = HeaderMatchFormset(request.POST, initial=initial_data) if formset.is_valid(): if not formset.has_changed(): return redirect('list_header_matches', list_id) # Purge the existing header_matches header_matches.clear() # Add the ones in the form def form_order(f): # If ORDER is None (new header match), add it last. return f.cleaned_data.get('ORDER') or len(formset.forms) errors = [] for form in sorted(formset, key=form_order): if 'header' not in form.cleaned_data: # The new header match form was not filled continue if form.cleaned_data.get('DELETE'): continue try: header_matches.add( header=form.cleaned_data['header'], pattern=form.cleaned_data['pattern'], action=form.cleaned_data['action'], ) except HTTPError as e: errors.append(e) for e in errors: messages.error( request, _('An error occured: %s') % e.reason) if not errors: messages.success(request, _('The header matches were' ' successfully modified.')) return redirect('list_header_matches', list_id) else: formset = HeaderMatchFormset(initial=initial_data) # Adapt the last form to create new matches form_new = formset.forms[-1] form_new.fields['header'].widget.attrs['placeholder'] = _('New header') form_new.fields['pattern'].widget.attrs['placeholder'] = _('New pattern') del form_new.fields['ORDER'] del form_new.fields['DELETE'] return render(request, 'postorius/lists/header_matches.html', { 'list': m_list, 'formset': formset, })