expose REST API for layerindex

This patch enables a read-only REST API for the layerindex
application using Django REST Framework.

The objects of types Branch, LayerBranch and LayerItem are
exposed to queries so that the layerindex application can
function as a Layer Source in Toaster.

The library dependencies are documented in the requirements.txt
file.

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/layerindex/restperm.py b/layerindex/restperm.py
new file mode 100644
index 0000000000..fb9f715d26
--- /dev/null
+++ b/layerindex/restperm.py
@@ -0,0 +1,7 @@
+from rest_framework import permissions
+
+class ReadOnlyPermission(permissions.BasePermission):
+    def has_permission(self, request, view):
+        if request.method in permissions.SAFE_METHODS:
+            return True
+        return False