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# Copyright 2018 ZTE Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import os
import traceback
from django.http import StreamingHttpResponse
from catalog.packages.biz.ns_descriptor import create, delete_single, download, query_multiple, query_single, upload
from catalog.packages.serializers.create_nsd_info_request import CreateNsdInfoRequestSerializer
from catalog.packages.serializers.nsd_info import NsdInfoSerializer
from catalog.packages.serializers.nsd_infos import NsdInfosSerializer
from catalog.pub.exceptions import CatalogException, ResourceNotFoundException
from drf_yasg.utils import no_body, swagger_auto_schema
from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.response import Response
logger = logging.getLogger(__name__)
@swagger_auto_schema(
method='GET',
operation_description="Query a NSD",
request_body=no_body,
responses={
status.HTTP_200_OK: NsdInfoSerializer(),
status.HTTP_404_NOT_FOUND: 'NSDs do not exist.',
status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
}
)
@swagger_auto_schema(
method='DELETE',
operation_description="Delete a NSD",
request_body=no_body,
responses={
status.HTTP_204_NO_CONTENT: None,
status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
}
)
@api_view(http_method_names=['GET', 'DELETE'])
def ns_info_rd(request, nsdInfoId): # TODO
if request.method == 'GET':
try:
data = query_single(nsdInfoId)
nsd_info = validate_data(data, NsdInfoSerializer)
return Response(data=nsd_info.data, status=status.HTTP_200_OK)
except ResourceNotFoundException as e:
logger.error(e.message)
return Response(data={'error': 'NSDs do not exist.'}, status=status.HTTP_404_NOT_FOUND)
except CatalogException as e:
logger.error(e.message)
error_msg = {'error': 'Query of a NSD failed.'}
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
error_msg = {'error': 'Query of a NSD failed.'}
return Response(data=error_msg, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
if request.method == 'DELETE':
try:
delete_single(nsdInfoId)
return Response(status=status.HTTP_204_NO_CONTENT)
except CatalogException as e:
logger.error(e.message)
error_msg = {'error': 'Deletion of a NSD failed.'}
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
error_msg = {'error': 'Deletion of a NSD failed.'}
return Response(data=error_msg, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
@swagger_auto_schema(
method='POST',
operation_description="Create a NSD",
request_body=CreateNsdInfoRequestSerializer(),
responses={
status.HTTP_201_CREATED: NsdInfoSerializer(),
status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
}
)
@swagger_auto_schema(
method='GET',
operation_description="Query multiple NSDs",
request_body=no_body,
responses={
status.HTTP_200_OK: NsdInfosSerializer(),
status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
}
)
@api_view(http_method_names=['POST', 'GET'])
def ns_descriptors_rc(request, *args, **kwargs):
if request.method == 'POST':
try:
create_nsd_info_requst = validate_data(request.data, CreateNsdInfoRequestSerializer)
data = create(create_nsd_info_requst.data)
nsd_info = validate_data(data, NsdInfoSerializer)
return Response(data=nsd_info.data, status=status.HTTP_201_CREATED)
except CatalogException as e:
logger.error(e.message)
error_msg = {'error': 'Creating a NSD failed.'}
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
error_msg = {'error': 'Creating a NSD failed.'}
return Response(data=error_msg, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
if request.method == 'GET':
try:
data = query_multiple()
nsd_infos = validate_data(data, NsdInfosSerializer)
return Response(data=nsd_infos.data, status=status.HTTP_200_OK)
except CatalogException as e:
logger.error(e.message)
error_msg = {'error': 'Query of multiple NSDs failed.'}
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
error_msg = {'error': 'Query of multiple NSDs failed.'}
return Response(data=error_msg, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
@swagger_auto_schema(
method='PUT',
operation_description="Upload NSD content",
request_body=no_body,
responses={
status.HTTP_204_NO_CONTENT: 'PNFD file',
status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
}
)
@swagger_auto_schema(
method='GET',
operation_description="Download NSD content",
request_body=no_body,
responses={
status.HTTP_204_NO_CONTENT: None,
status.HTTP_404_NOT_FOUND: 'NSD does not exist.',
status.HTTP_500_INTERNAL_SERVER_ERROR: "Internal error"
}
)
@api_view(http_method_names=['PUT', 'GET'])
def nsd_content_ru(request, *args, **kwargs):
nsd_info_id = kwargs.get("nsdInfoId")
if request.method == 'PUT':
files = request.FILES.getlist('file')
try:
upload(files[0], nsd_info_id)
return Response(data=None, status=status.HTTP_204_NO_CONTENT)
except CatalogException as e:
logger.error(e.message)
error_msg = {'error': 'Uploading NSD content failed.'}
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
error_msg = {'error': 'Uploading NSD content failed.'}
return Response(data=error_msg, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
if request.method == 'GET':
try:
file_path = download(nsd_info_id)
file_name = file_path.split('/')[-1]
file_name = file_name.split('\\')[-1]
start, end = 0, os.path.getsize(file_path)
file_range = request.META.get('RANGE')
if file_range:
[start, end] = file_range.split('-')
start, end = start.strip(), end.strip()
start, end = int(start), int(end)
response = StreamingHttpResponse(
read_partial_file(file_path, start, end),
status=status.HTTP_200_OK
)
response['Content-Range'] = '%s-%s' % (start, end)
response['Content-Disposition'] = 'attachment; filename=%s' % file_name.encode('utf-8')
response['Content-Length'] = end - start
return response
except ResourceNotFoundException as e:
logger.error(e.message)
return Response(data={'error': 'NSD does not exist.'}, status=status.HTTP_404_NOT_FOUND)
except CatalogException as e:
logger.error(e.message)
error_msg = {'error': 'Downloading NSD content failed.'}
except Exception as e:
logger.error(e.message)
logger.error(traceback.format_exc())
error_msg = {'error': 'Downloading NSD content failed.'}
return Response(data=error_msg, status=status.HTTP_500_INTERNAL_SERVER_ERROR)
def read_partial_file(file_path, start, end):
fp = open(file_path, 'rb')
fp.seek(start)
pos = start
CHUNK_SIZE = 1024 * 8
while pos + CHUNK_SIZE < end:
yield fp.read(CHUNK_SIZE)
pos = fp.tell()
yield fp.read(end - pos)
def validate_data(data, serializer):
serialized_data = serializer(data=data)
if not serialized_data.is_valid():
logger.error('Data validation failed.')
raise CatalogException(serialized_data.error)
return serialized_data
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