# -*- coding: utf-8 -*- # import os import tarfile from django.db.models import F from django.shortcuts import get_object_or_404, reverse from django.utils.translation import ugettext as _ from django.utils.encoding import escape_uri_path from django.http import FileResponse from django.core.files.storage import default_storage from rest_framework import viewsets, views from rest_framework.response import Response from rest_framework.decorators import action from rest_framework.permissions import IsAuthenticated from rest_framework import generics from common.utils import data_to_json from common.const.http import GET from common.utils import get_logger, get_object_or_none from common.mixins.api import AsyncApiMixin from common.drf.filters import DatetimeRangeFilter from common.drf.renders import PassthroughRenderer from orgs.mixins.api import OrgBulkModelViewSet from orgs.utils import tmp_to_root_org, tmp_to_org from users.models import User from .. import utils from ..utils import find_session_replay_local, download_session_replay from ..models import Session from .. import serializers from terminal.utils import is_session_approver __all__ = [ 'SessionViewSet', 'SessionReplayViewSet', 'SessionJoinValidateAPI', 'MySessionAPIView', ] logger = get_logger(__name__) class MySessionAPIView(generics.ListAPIView): permission_classes = (IsAuthenticated, ) serializer_class = serializers.SessionSerializer def get_queryset(self): user = self.request.user qs = Session.objects.filter(user_id=user.id) return qs class SessionViewSet(OrgBulkModelViewSet): model = Session serializer_classes = { 'default': serializers.SessionSerializer, 'display': serializers.SessionDisplaySerializer, } search_fields = [ "user", "asset", "system_user", "remote_addr", "protocol", "is_finished", 'login_from', ] filterset_fields = search_fields + ['terminal'] date_range_filter_fields = [ ('date_start', ('date_from', 'date_to')) ] extra_filter_backends = [DatetimeRangeFilter] rbac_perms = { 'download': ['terminal.download_sessionreplay'] } @staticmethod def prepare_offline_file(session, local_path): replay_path = default_storage.path(local_path) current_dir = os.getcwd() dir_path = os.path.dirname(replay_path) replay_filename = os.path.basename(replay_path) meta_filename = '{}.json'.format(session.id) offline_filename = '{}.tar'.format(session.id) os.chdir(dir_path) with open(meta_filename, 'wt') as f: serializer = serializers.SessionDisplaySerializer(session) data = data_to_json(serializer.data) f.write(data) with tarfile.open(offline_filename, 'w') as f: f.add(replay_filename) f.add(meta_filename) file = open(offline_filename, 'rb') os.chdir(current_dir) return file @action(methods=[GET], detail=True, renderer_classes=(PassthroughRenderer,), url_path='replay/download', url_name='replay-download') def download(self, request, *args, **kwargs): session = self.get_object() local_path, url = utils.get_session_replay_url(session) if local_path is None: return Response({"error": url}, status=404) file = self.prepare_offline_file(session, local_path) response = FileResponse(file) response['Content-Type'] = 'application/octet-stream' # 这里要注意哦，网上查到的方法都是response['Content-Disposition']='attachment;filename="filename.py"', # 但是如果文件名是英文名没问题，如果文件名包含中文，下载下来的文件名会被改为url中的path。 filename = escape_uri_path('{}.tar'.format(session.id)) disposition = "attachment; filename*=UTF-8''{}".format(filename) response["Content-Disposition"] = disposition return response def get_queryset(self): queryset = super().get_queryset().prefetch_related('terminal')\ .annotate(terminal_display=F('terminal__name')) return queryset def filter_queryset(self, queryset): queryset = super().filter_queryset(queryset) # 解决guacamole更新session时并发导致幽灵会话的问题，暂不处理 if self.request.method in ('PATCH',): queryset = queryset.select_for_update() return queryset def perform_create(self, serializer): if hasattr(self.request.user, 'terminal'): serializer.validated_data["terminal"] = self.request.user.terminal return super().perform_create(serializer) class SessionReplayViewSet(AsyncApiMixin, viewsets.ViewSet): serializer_class = serializers.ReplaySerializer download_cache_key = "SESSION_REPLAY_DOWNLOAD_{}" session = None rbac_perms = { 'create': 'terminal.upload_sessionreplay', 'retrieve': 'terminal.view_sessionreplay', } def create(self, request, *args, **kwargs): session_id = kwargs.get('pk') session = get_object_or_404(Session, id=session_id) serializer = self.serializer_class(data=request.data) if serializer.is_valid(): file = serializer.validated_data['file'] # 兼容旧版本 API 未指定 version 为 2 的情况 version = serializer.validated_data.get('version', 2) name, err = session.save_replay_to_storage_with_version(file, version) if not name: msg = "Failed save replay `{}`: {}".format(session_id, err) logger.error(msg) return Response({'msg': str(err)}, status=400) url = default_storage.url(name) return Response({'url': url}, status=201) else: msg = 'Upload data invalid: {}'.format(serializer.errors) logger.error(msg) return Response({'msg': serializer.errors}, status=401) @staticmethod def get_replay_data(session, url): tp = 'json' if session.protocol in ('rdp', 'vnc'): # 需要考虑录像播放和离线播放器的约定，暂时不处理 tp = 'guacamole' if url.endswith('.cast.gz'): tp = 'asciicast' download_url = reverse('api-terminal:session-replay-download', kwargs={'pk': session.id}) data = { 'type': tp, 'src': url, 'user': session.user, 'asset': session.asset, 'system_user': session.system_user, 'date_start': session.date_start, 'date_end': session.date_end, 'download_url': download_url, } return data def is_need_async(self): if self.action != 'retrieve': return False return True def retrieve(self, request, *args, **kwargs): session_id = kwargs.get('pk') session = get_object_or_404(Session, id=session_id) local_path, url = find_session_replay_local(session) if not local_path: local_path, url = download_session_replay(session) if not local_path: return Response({"error": url}, status=404) data = self.get_replay_data(session, url) return Response(data) class SessionJoinValidateAPI(views.APIView): """ 监控用 """ serializer_class = serializers.SessionJoinValidateSerializer rbac_perms = { 'POST': 'terminal.validate_sessionactionperm' } def post(self, request, *args, **kwargs): serializer = self.serializer_class(data=request.data) if not serializer.is_valid(): msg = str(serializer.errors) return Response({'ok': False, 'msg': msg}, status=401) user_id = serializer.validated_data['user_id'] session_id = serializer.validated_data['session_id'] with tmp_to_root_org(): session = get_object_or_none(Session, pk=session_id) if not session: msg = _('Session does not exist: {}'.format(session_id)) return Response({'ok': False, 'msg': msg}, status=401) if not session.can_join: msg = _('Session is finished or the protocol not supported') return Response({'ok': False, 'msg': msg}, status=401) user = get_object_or_none(User, pk=user_id) if not user: msg = _('User does not exist: {}'.format(user_id)) return Response({'ok': False, 'msg': msg}, status=401) with tmp_to_org(session.org): if is_session_approver(session_id, user_id): return Response({'ok': True, 'msg': ''}, status=200) if not user.has_perm('terminal.monitor_session'): msg = _('User does not have permission') return Response({'ok': False, 'msg': msg}, status=401) return Response({'ok': True, 'msg': ''}, status=200)