Rest framework (#24)

* Add rest framework for API: First Commit

* modify some shell scripts to make variable references safer; modify some python scripts to reduce the code complexity and cyclomatic complexity of functions.

* Add REST API for some webvirtcloud functions. Instance list/delete/create, compute list/delete/create, storages-network list/retrieve. Add swagger and redoc for API interface

* update requirements

Co-authored-by: herengui <herengui@uniontech.com>

networks/api/viewsets.py

@@ -0,0 +1,26 @@
+from django.shortcuts import get_object_or_404
+from computes.models import Compute
+from rest_framework import status, viewsets
+
+from vrtManager.network import wvmNetworks
+
+from .serializers import NetworksSerializer
+from rest_framework.response import Response
+
+
+class NetworkViewSet(viewsets.ViewSet):
+    """
+    A viewset for listing retrieving networks.
+    """
+    
+    def list(self, request, compute_pk=None):
+        
+        compute = get_object_or_404(Compute, pk=compute_pk)
+    
+        conn = wvmNetworks(compute.hostname, compute.login, compute.password, compute.type)
+        queryset = conn.get_networks_info()
+
+        serializer = NetworksSerializer(queryset, many=True, context={'request': request})
+
+        return Response(serializer.data)
+