732 lines
27 KiB
Python
732 lines
27 KiB
Python
import smtplib
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import textwrap
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from typing import List
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from asgiref.sync import async_to_sync
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from django.conf import settings
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from django.contrib.auth import (
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login as auth_login,
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logout as auth_logout,
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update_session_auth_hash,
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)
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from django.contrib.auth.forms import AuthenticationForm
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from django.contrib.auth.password_validation import validate_password
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from django.contrib.auth.tokens import default_token_generator
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from django.contrib.sites.shortcuts import get_current_site
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from django.core import mail
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from django.core.exceptions import ValidationError as DjangoValidationError
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from django.db import transaction
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from django.http.request import QueryDict
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from django.utils.encoding import force_bytes, force_text
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from django.utils.http import urlsafe_base64_decode, urlsafe_base64_encode
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from ..core.config import config
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from ..core.signals import permission_change
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from ..utils.auth import (
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GROUP_ADMIN_PK,
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GROUP_DEFAULT_PK,
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anonymous_is_enabled,
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has_perm,
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)
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from ..utils.autoupdate import Element, inform_changed_data, inform_changed_elements
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from ..utils.cache import element_cache
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from ..utils.rest_api import (
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ModelViewSet,
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Response,
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SimpleMetadata,
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ValidationError,
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detail_route,
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list_route,
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status,
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)
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from ..utils.views import APIView
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from .access_permissions import (
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GroupAccessPermissions,
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PersonalNoteAccessPermissions,
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UserAccessPermissions,
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)
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from .models import Group, PersonalNote, User
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from .serializers import GroupSerializer, PermissionRelatedField
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# Viewsets for the REST API
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class UserViewSet(ModelViewSet):
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"""
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API endpoint for users.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update, destroy and reset_password.
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"""
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access_permissions = UserAccessPermissions()
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queryset = User.objects.all()
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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if self.action in ("list", "retrieve"):
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result = self.get_access_permissions().check_permissions(self.request.user)
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elif self.action == "metadata":
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result = has_perm(self.request.user, "users.can_see_name")
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elif self.action in ("update", "partial_update"):
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result = self.request.user.is_authenticated
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elif self.action in (
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"create",
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"destroy",
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"reset_password",
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"mass_import",
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"mass_invite_email",
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):
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result = (
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has_perm(self.request.user, "users.can_see_name")
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and has_perm(self.request.user, "users.can_see_extra_data")
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and has_perm(self.request.user, "users.can_manage")
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)
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else:
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result = False
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return result
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def update(self, request, *args, **kwargs):
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"""
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Customized view endpoint to update an user.
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Checks also whether the requesting user can update the user. He
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needs at least the permissions 'users.can_see_name' (see
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self.check_view_permissions()). Also it is evaluated whether he
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wants to update himself or is manager.
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"""
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user = self.get_object()
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# Check permissions.
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if (
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has_perm(self.request.user, "users.can_see_name")
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and has_perm(request.user, "users.can_see_extra_data")
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and has_perm(request.user, "users.can_manage")
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):
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# The user has all permissions so he may update every user.
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if request.data.get("is_active") is False and user == request.user:
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# But a user can not deactivate himself.
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raise ValidationError({"detail": "You can not deactivate yourself."})
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else:
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# The user does not have all permissions so he may only update himself.
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if str(request.user.pk) != self.kwargs["pk"]:
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self.permission_denied(request)
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# This is a hack to make request.data mutable. Otherwise fields can not be deleted.
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if isinstance(request.data, QueryDict):
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request.data._mutable = True
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# Remove fields that the user is not allowed to change.
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# The list() is required because we want to use del inside the loop.
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for key in list(request.data.keys()):
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if key not in ("username", "about_me"):
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del request.data[key]
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response = super().update(request, *args, **kwargs)
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# Maybe some group assignments have changed. Better delete the restricted user cache
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async_to_sync(element_cache.del_user)(user.pk)
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return response
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def destroy(self, request, *args, **kwargs):
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"""
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Customized view endpoint to delete an user.
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Ensures that no one can delete himself.
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"""
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instance = self.get_object()
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if instance == self.request.user:
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raise ValidationError({"detail": "You can not delete yourself."})
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self.perform_destroy(instance)
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return Response(status=status.HTTP_204_NO_CONTENT)
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@detail_route(methods=["post"])
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def reset_password(self, request, pk=None):
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"""
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View to reset the password using the requested password.
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If update_defualt_password=True is given, the new password will also be set
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as the default_password.
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"""
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user = self.get_object()
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password = request.data.get("password")
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if not isinstance(password, str):
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raise ValidationError({"detail": "Password has to be a string."})
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update_default_password = request.data.get("update_default_password", False)
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if not isinstance(update_default_password, bool):
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raise ValidationError(
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{"detail": "update_default_password has to be a boolean."}
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)
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try:
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validate_password(password, user=request.user)
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except DjangoValidationError as errors:
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raise ValidationError({"detail": " ".join(errors)})
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user.set_password(password)
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if update_default_password:
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user.default_password = password
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user.save()
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return Response({"detail": "Password successfully reset."})
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@list_route(methods=["post"])
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@transaction.atomic
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def mass_import(self, request):
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"""
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API endpoint to create multiple users at once.
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Example: {"users": [{"first_name": "Max"}, {"first_name": "Maxi"}]}
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"""
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users = request.data.get("users")
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if not isinstance(users, list):
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raise ValidationError({"detail": "Users has to be a list."})
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created_users = []
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# List of all track ids of all imported users. The track ids are just used in the client.
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imported_track_ids = []
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for user in users:
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serializer = self.get_serializer(data=user)
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try:
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serializer.is_valid(raise_exception=True)
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except ValidationError:
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# Skip invalid users.
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continue
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data = serializer.prepare_password(serializer.data)
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groups = data["groups_id"]
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del data["groups_id"]
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db_user = User(**data)
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db_user.save(skip_autoupdate=True)
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db_user.groups.add(*groups)
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created_users.append(db_user)
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if "importTrackId" in user:
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imported_track_ids.append(user["importTrackId"])
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# Now infom all clients and send a response
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inform_changed_data(created_users)
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return Response(
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{
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"detail": f"{len(created_users)} users successfully imported.",
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"importedTrackIds": imported_track_ids,
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}
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)
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@list_route(methods=["post"])
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def mass_invite_email(self, request):
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"""
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Endpoint to send invitation emails to all given users (by id). Returns the
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number of emails send.
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"""
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user_ids = request.data.get("user_ids")
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if not isinstance(user_ids, list):
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raise ValidationError({"detail": "User_ids has to be a list."})
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for user_id in user_ids:
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if not isinstance(user_id, int):
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raise ValidationError({"detail": "User_id has to be an int."})
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# Get subject and body from the response. Do not use the config values
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# because they might not be translated.
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subject = request.data.get("subject")
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message = request.data.get("message")
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if not isinstance(subject, str):
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raise ValidationError({"detail": "Subject has to be a string."})
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if not isinstance(message, str):
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raise ValidationError({"detail": "Message has to be a string."})
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users = User.objects.filter(pk__in=user_ids)
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# Sending Emails. Keep track, which users gets an email.
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# First, try to open the connection to the smtp server.
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connection = mail.get_connection(fail_silently=False)
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try:
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connection.open()
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except ConnectionRefusedError:
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raise ValidationError(
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{
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"detail": f"Cannot connect to SMTP server on {settings.EMAIL_HOST}:{settings.EMAIL_PORT}"
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}
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)
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except smtplib.SMTPException as err:
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raise ValidationError({"detail": f"{err.errno}: {err.strerror}"})
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success_users = []
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user_pks_without_email = []
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try:
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for user in users:
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if user.email:
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if user.send_invitation_email(
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connection, subject, message, skip_autoupdate=True
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):
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success_users.append(user)
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else:
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user_pks_without_email.append(user.pk)
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except DjangoValidationError as err:
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raise ValidationError(err.message_dict)
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connection.close()
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inform_changed_data(success_users)
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return Response(
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{"count": len(success_users), "no_email_ids": user_pks_without_email}
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)
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class GroupViewSetMetadata(SimpleMetadata):
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"""
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Customized metadata class for OPTIONS requests.
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"""
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def get_field_info(self, field):
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"""
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Customized method to change the display name of permission choices.
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"""
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field_info = super().get_field_info(field)
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if field.field_name == "permissions":
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field_info["choices"] = [
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{
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"value": choice_value,
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"display_name": force_text(choice_name, strings_only=True).split(
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" | "
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)[2],
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}
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for choice_value, choice_name in field.choices.items()
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]
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return field_info
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class GroupViewSet(ModelViewSet):
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"""
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API endpoint for groups.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update and destroy.
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"""
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metadata_class = GroupViewSetMetadata
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queryset = Group.objects.all()
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serializer_class = GroupSerializer
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access_permissions = GroupAccessPermissions()
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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if self.action in ("list", "retrieve"):
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result = self.get_access_permissions().check_permissions(self.request.user)
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elif self.action == "metadata":
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# Every authenticated user can see the metadata.
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# Anonymous users can do so if they are enabled.
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result = self.request.user.is_authenticated or anonymous_is_enabled()
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elif self.action in ("create", "partial_update", "update", "destroy"):
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# Users with all app permissions can edit groups.
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result = (
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has_perm(self.request.user, "users.can_see_name")
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and has_perm(self.request.user, "users.can_see_extra_data")
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and has_perm(self.request.user, "users.can_manage")
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)
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else:
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# Deny request in any other case.
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result = False
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return result
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def update(self, request, *args, **kwargs):
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"""
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Customized endpoint to update a group. Send the signal
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'permission_change' if group permissions change.
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"""
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group = self.get_object()
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# Collect old and new (given) permissions to get the difference.
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old_permissions = list(
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group.permissions.all()
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) # Force evaluation so the perms don't change anymore.
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permission_names = request.data["permissions"]
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if isinstance(permission_names, str):
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permission_names = [permission_names]
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given_permissions = [
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PermissionRelatedField(read_only=True).to_internal_value(data=perm)
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for perm in permission_names
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]
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# Run super to update the group.
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response = super().update(request, *args, **kwargs)
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# Check status code and send 'permission_change' signal.
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if response.status_code == 200:
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# Delete the user chaches of all affected users
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for user in group.user_set.all():
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async_to_sync(element_cache.del_user)(user.pk)
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def diff(full, part):
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"""
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This helper function calculates the difference of two lists:
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The result is a list of all elements of 'full' that are
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not in 'part'.
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"""
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part = set(part)
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return [item for item in full if item not in part]
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new_permissions = diff(given_permissions, old_permissions)
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# Some permissions are added.
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if new_permissions:
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elements: List[Element] = []
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signal_results = permission_change.send(
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None, permissions=new_permissions, action="added"
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)
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all_full_data = async_to_sync(element_cache.get_all_full_data)()
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for __, signal_collections in signal_results:
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for cachable in signal_collections:
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for full_data in all_full_data.get(
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cachable.get_collection_string(), {}
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):
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elements.append(
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Element(
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id=full_data["id"],
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collection_string=cachable.get_collection_string(),
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full_data=full_data,
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disable_history=True,
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)
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)
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inform_changed_elements(elements)
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# TODO: Some permissions are deleted.
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return response
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def destroy(self, request, *args, **kwargs):
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"""
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Protects builtin groups 'Default' (pk=1) and 'Admin' (pk=2) from being deleted.
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"""
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instance = self.get_object()
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if instance.pk in (GROUP_DEFAULT_PK, GROUP_ADMIN_PK):
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self.permission_denied(request)
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# The list() is required to evaluate the query
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affected_users_ids = list(instance.user_set.values_list("pk", flat=True))
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# Delete the group
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self.perform_destroy(instance)
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# Get the updated user data from the DB.
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affected_users = User.objects.filter(pk__in=affected_users_ids)
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inform_changed_data(affected_users)
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return Response(status=status.HTTP_204_NO_CONTENT)
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class PersonalNoteViewSet(ModelViewSet):
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"""
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API endpoint for personal notes.
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There are the following views: metadata, list, retrieve, create,
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partial_update, update, and destroy.
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"""
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access_permissions = PersonalNoteAccessPermissions()
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queryset = PersonalNote.objects.all()
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def check_view_permissions(self):
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"""
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Returns True if the user has required permissions.
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"""
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if self.action in ("list", "retrieve"):
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result = self.get_access_permissions().check_permissions(self.request.user)
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elif self.action in (
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"metadata",
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"create",
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"partial_update",
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"update",
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"destroy",
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):
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# Every authenticated user can see metadata and create personal
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# notes for himself and can manipulate only his own personal notes.
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# See self.perform_create(), self.update() and self.destroy().
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result = self.request.user.is_authenticated
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else:
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result = False
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return result
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def perform_create(self, serializer):
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"""
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Customized method to inject the request.user into serializer's save
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method so that the request.user can be saved into the model field.
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"""
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serializer.save(user=self.request.user)
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def update(self, request, *args, **kwargs):
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"""
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Customized method to ensure that every user can change only his own
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personal notes.
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"""
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if self.get_object().user != self.request.user:
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self.permission_denied(request)
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return super().update(request, *args, **kwargs)
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def destroy(self, request, *args, **kwargs):
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"""
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Customized method to ensure that every user can delete only his own
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personal notes.
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"""
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if self.get_object().user != self.request.user:
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self.permission_denied(request)
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return super().destroy(request, *args, **kwargs)
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# Special API views
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class UserLoginView(APIView):
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"""
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Login the user.
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"""
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http_method_names = ["get", "post"]
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def post(self, *args, **kwargs):
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# If the client tells that cookies are disabled, do not continue as guest (if enabled)
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if not self.request.data.get("cookies", True):
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raise ValidationError(
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{"detail": "Cookies have to be enabled to use OpenSlides."}
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)
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form = AuthenticationForm(self.request, data=self.request.data)
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if not form.is_valid():
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raise ValidationError({"detail": "Username or password is not correct."})
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self.user = form.get_user()
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auth_login(self.request, self.user)
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return super().post(*args, **kwargs)
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def get_context_data(self, **context):
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"""
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Adds some context.
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For GET requests adds login info text to context. This info text is
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taken from the config. If this value is empty, a special text is used
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if the admin user has the password 'admin'.
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For POST requests adds the id of the current user to the context.
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"""
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if self.request.method == "GET":
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if config["general_login_info_text"]:
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context["info_text"] = config["general_login_info_text"]
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else:
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try:
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user = User.objects.get(username="admin")
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except User.DoesNotExist:
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context["info_text"] = ""
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else:
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if user.check_password("admin"):
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context["info_text"] = (
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f"Use <strong>admin</strong> and <strong>admin</strong> for your first login.<br>"
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"Please change your password to hide this message!"
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)
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else:
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context["info_text"] = ""
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# Add the privacy policy and legal notice, so the client can display it
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# even, it is not logged in.
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context["privacy_policy"] = config["general_event_privacy_policy"]
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context["legal_notice"] = config["general_event_legal_notice"]
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# Add the theme, so the loginpage is themed correctly
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|
context["theme"] = config["openslides_theme"]
|
|
else:
|
|
# self.request.method == 'POST'
|
|
context["user_id"] = self.user.pk
|
|
context["user"] = async_to_sync(element_cache.get_element_restricted_data)(
|
|
self.user.pk or 0, self.user.get_collection_string(), self.user.pk
|
|
)
|
|
return super().get_context_data(**context)
|
|
|
|
|
|
class UserLogoutView(APIView):
|
|
"""
|
|
Logout the user.
|
|
"""
|
|
|
|
http_method_names = ["post"]
|
|
|
|
def post(self, *args, **kwargs):
|
|
if not self.request.user.is_authenticated:
|
|
raise ValidationError({"detail": "You are not authenticated."})
|
|
auth_logout(self.request)
|
|
return super().post(*args, **kwargs)
|
|
|
|
|
|
class WhoAmIView(APIView):
|
|
"""
|
|
Returns the id of the requesting user.
|
|
"""
|
|
|
|
http_method_names = ["get"]
|
|
|
|
def get_context_data(self, **context):
|
|
"""
|
|
Appends the user id to the context. Uses None for the anonymous
|
|
user. Appends also a flag if guest users are enabled in the config.
|
|
Appends also the serialized user if available.
|
|
"""
|
|
user_id = self.request.user.pk or 0
|
|
if user_id:
|
|
user_data = async_to_sync(element_cache.get_element_restricted_data)(
|
|
user_id, self.request.user.get_collection_string(), user_id
|
|
)
|
|
else:
|
|
user_data = None
|
|
return super().get_context_data(
|
|
user_id=user_id or None,
|
|
guest_enabled=anonymous_is_enabled(),
|
|
user=user_data,
|
|
**context,
|
|
)
|
|
|
|
|
|
class SetPasswordView(APIView):
|
|
"""
|
|
Users can set a new password for themselves.
|
|
"""
|
|
|
|
http_method_names = ["post"]
|
|
|
|
def post(self, request, *args, **kwargs):
|
|
user = request.user
|
|
if not (
|
|
has_perm(user, "users.can_change_password")
|
|
or has_perm(user, "users.can_manage")
|
|
):
|
|
self.permission_denied(request)
|
|
if user.check_password(request.data["old_password"]):
|
|
try:
|
|
validate_password(request.data.get("new_password"), user=user)
|
|
except DjangoValidationError as errors:
|
|
raise ValidationError({"detail": " ".join(errors)})
|
|
user.set_password(request.data["new_password"])
|
|
user.save()
|
|
update_session_auth_hash(request, user)
|
|
else:
|
|
raise ValidationError({"detail": "Old password does not match."})
|
|
return super().post(request, *args, **kwargs)
|
|
|
|
|
|
class PasswordResetView(APIView):
|
|
"""
|
|
Users can send an email to themselves to get a password reset email.
|
|
|
|
Send POST request with {'email': <email addresss>} and all users with this
|
|
address will receive an email (means Django sends one or more emails to
|
|
this address) with a one-use only link.
|
|
"""
|
|
|
|
http_method_names = ["post"]
|
|
use_https = True # TODO: get used protocol from server, see issue #4233
|
|
|
|
def post(self, request, *args, **kwargs):
|
|
"""
|
|
Loop over all users and send emails.
|
|
"""
|
|
to_email = request.data.get("email")
|
|
for user in self.get_users(to_email):
|
|
current_site = get_current_site(request)
|
|
site_name = current_site.name
|
|
if has_perm(user, "users.can_change_password") or has_perm(
|
|
user, "users.can_manage"
|
|
):
|
|
context = {
|
|
"email": to_email,
|
|
"site_name": site_name,
|
|
"protocol": "https" if self.use_https else "http",
|
|
"domain": current_site.domain,
|
|
"path": "/login/reset-password-confirm/",
|
|
"user_id": urlsafe_base64_encode(force_bytes(user.pk)).decode(),
|
|
"token": default_token_generator.make_token(user),
|
|
"username": user.get_username(),
|
|
}
|
|
body = self.get_email_body(**context)
|
|
else:
|
|
# User is not allowed to reset his permission. Send only short message.
|
|
body = f"""
|
|
You do not have permission to reset your password at {site_name}.
|
|
|
|
Please contact your local administrator.
|
|
|
|
Your username, in case you've forgotten: {user.get_username()}
|
|
"""
|
|
# Send a django.core.mail.EmailMessage to `to_email`.
|
|
subject = f"Password reset for {site_name}"
|
|
subject = "".join(subject.splitlines())
|
|
from_email = None # TODO: Add nice from_email here.
|
|
email_message = mail.EmailMessage(subject, body, from_email, [to_email])
|
|
email_message.send()
|
|
return super().post(request, *args, **kwargs)
|
|
|
|
def get_users(self, email):
|
|
"""Given an email, return matching user(s) who should receive a reset.
|
|
|
|
This allows subclasses to more easily customize the default policies
|
|
that prevent inactive users and users with unusable passwords from
|
|
resetting their password.
|
|
"""
|
|
active_users = User.objects.filter(
|
|
**{"email__iexact": email, "is_active": True}
|
|
)
|
|
return (u for u in active_users if u.has_usable_password())
|
|
|
|
def get_email_body(self, **context):
|
|
"""
|
|
Add context to email template and return the complete body.
|
|
"""
|
|
return textwrap.dedent(
|
|
"""
|
|
You're receiving this email because you requested a password reset for your user account at {site_name}.
|
|
|
|
Please go to the following page and choose a new password:
|
|
|
|
{protocol}://{domain}{path}?user_id={user_id}&token={token}
|
|
|
|
Your username, in case you've forgotten: {username}
|
|
|
|
Thanks for using our site!
|
|
|
|
The {site_name} team.
|
|
"""
|
|
).format(**context)
|
|
|
|
|
|
class PasswordResetConfirmView(APIView):
|
|
"""
|
|
View to reset the password.
|
|
|
|
Send POST request with {'user_id': <encoded user id>, 'token': <token>,
|
|
'password' <new password>} to set password of this user to the new one.
|
|
"""
|
|
|
|
http_method_names = ["post"]
|
|
|
|
def post(self, request, *args, **kwargs):
|
|
uidb64 = request.data.get("user_id")
|
|
token = request.data.get("token")
|
|
password = request.data.get("password")
|
|
if not (uidb64 and token and password):
|
|
raise ValidationError(
|
|
{"detail": "You have to provide user_id, token and password."}
|
|
)
|
|
user = self.get_user(uidb64)
|
|
if user is None:
|
|
raise ValidationError({"detail": "User does not exist."})
|
|
if not (
|
|
has_perm(user, "users.can_change_password")
|
|
or has_perm(user, "users.can_manage")
|
|
):
|
|
self.permission_denied(request)
|
|
if not default_token_generator.check_token(user, token):
|
|
raise ValidationError({"detail": "Invalid token."})
|
|
try:
|
|
validate_password(password, user=user)
|
|
except DjangoValidationError as errors:
|
|
raise ValidationError({"detail": " ".join(errors)})
|
|
user.set_password(password)
|
|
user.save()
|
|
return super().post(request, *args, **kwargs)
|
|
|
|
def get_user(self, uidb64):
|
|
try:
|
|
# urlsafe_base64_decode() decodes to bytestring
|
|
uid = urlsafe_base64_decode(uidb64).decode()
|
|
user = User.objects.get(pk=uid)
|
|
except (TypeError, ValueError, OverflowError, User.DoesNotExist):
|
|
user = None
|
|
return user
|