occi: add actions

circle/occi/occi.py

+import re
+
 from django.contrib.auth.models import User
 from django.template.loader import render_to_string
 
@@ -7,6 +9,29 @@ from vm.models.instance import ACCESS_METHODS
 
 OCCI_ADDR = "http://localhost:8080/"
 
+occi_attribute_regex = re.compile(
+    '^X-OCCI-Attribute: ?method="(?P<method>[a-zA-Z]+)"$')
+
+occi_action_regex = re.compile(
+    '^Category: (?P<term>[a-zA-Z]+); ?scheme=".+"; ?class="action"$')
+
+compute_action_to_operation = {
+    'stop': {
+        'graceful': "shutdown",
+        'acpioff': "shutdown",
+        'poweroff': "shut_off",
+    },
+    'restart': {
+        'graceful': "restart",
+        'warm': "restart",
+        'cold': "reset",
+    },
+    'suspend': {
+        'suspend': "sleep",
+        'hibernate': "sleep",
+    }
+}
+
 
 class Category():
     """Represents a Category object
@@ -147,6 +172,30 @@ class Compute(Resource):
         for k, v in self.translate.items():
             self.attrs[k] = getattr(self.instance, v, None)
 
+    def trigger_action(self, data):
+        method = None
+        action_term = None
+        for d in data:
+            m = occi_attribute_regex.match(d)
+            if m:
+                method = m.group("method")
+            m = occi_action_regex.match(d)
+            if m:
+                action_term = m.group("term")
+
+        if action_term == "start":
+            if self.instance.status == "SUSPENDED":
+                operation = "wake_up"
+            else:
+                operation = "deploy"
+        else:
+            action = compute_action_to_operation.get(action_term)
+            operation = action.get(method)
+
+        # TODO user
+        user = User.objects.get(username="test")
+        getattr(self.instance, operation).async(user=user)
+
 
 class OsTemplate(Mixin):
     def __init__(self, template):

circle/occi/views.py

@@ -80,8 +80,23 @@ class VmInterface(DetailView):
         )
 
     def post(self, request, *args, **kwargs):
-        # actions, resource change
-        pass
+        data = self.get_post_data(request)
+        action = request.GET.get("action")
+        vm = self.get_object()
+        if action:
+            Compute(instance=vm).trigger_action(data)
+        return HttpResponse()
+
+    def get_post_data(self, request):
+        post_data = []
+        accept = request.META.get("HTTP_ACCEPT")
+        if accept and accept.split(",")[0] == "text/occi":
+            pass
+        else:  # text/plain or missing
+            for l in request.readlines():
+                if l:
+                    post_data.append(l.strip())
+        return post_data
 
     @method_decorator(csrf_exempt)  # decorator on post method doesn't work
     def dispatch(self, *args, **kwargs):