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>

computes/api/serializers.py

@@ -0,0 +1,27 @@
+
+from rest_framework import serializers
+from computes.models import Compute
+from vrtManager.connection import (
+    CONN_SOCKET,
+    CONN_SSH,
+    CONN_TCP,
+    CONN_TLS,
+)
+
+
+class ComputeSerializer(serializers.ModelSerializer):
+     # Use <input type="password"> for the input.
+    password = serializers.CharField(style={'input_type': 'password'})
+    # Use a radio input instead of a select input.
+    conn_types = (
+        (CONN_SSH, 'SSH'), 
+        (CONN_TCP, 'TCP'),
+        (CONN_TLS, 'TLS'), 
+        (CONN_SOCKET, 'SOCK'),
+    )
+    type = serializers.ChoiceField(choices=conn_types)
+
+
+    class Meta:
+        model = Compute
+        fields = ['id', 'name', 'hostname', 'login', 'password', 'type', 'details']

computes/api/viewsets.py

@@ -0,0 +1,58 @@
+from computes.models import Compute
+from rest_framework import viewsets
+from rest_framework import permissions
+
+from vrtManager.create import wvmCreate
+from .serializers import ComputeSerializer
+from rest_framework.response import Response
+
+
+class ComputeViewSet(viewsets.ModelViewSet):
+    """
+    API endpoint that allows computes to be viewed or edited.
+    """
+    queryset = Compute.objects.all().order_by('name')
+    serializer_class = ComputeSerializer
+    permission_classes = [permissions.IsAuthenticated]
+
+
+class ComputeArchitecturesView(viewsets.ViewSet):
+
+    def list(self, request, compute_pk=None):
+        """
+        Return a list of supported host architectures.
+        """
+        compute = Compute.objects.get(pk=compute_pk)
+        conn = wvmCreate(
+            compute.hostname,
+            compute.login,
+            compute.password,
+            compute.type,
+        )
+        return Response(conn.get_hypervisors_machines())
+
+    def retrieve(self, request, compute_pk=None, pk=None):
+        compute = Compute.objects.get(pk=compute_pk)
+        conn = wvmCreate(
+            compute.hostname,
+            compute.login,
+            compute.password,
+            compute.type,
+        )
+        return Response(conn.get_machine_types(pk))
+
+
+class ComputeMachinesView(viewsets.ViewSet):
+
+    def list(self, request, compute_pk=None, archs_pk=None):
+        """
+        Return a list of supported host architectures.
+        """
+        compute = Compute.objects.get(pk=compute_pk)
+        conn = wvmCreate(
+            compute.hostname,
+            compute.login,
+            compute.password,
+            compute.type,
+        )
+        return Response(conn.get_machine_types(archs_pk))