Support querying version list

1 files changed, 13 insertions, 0 deletions

diff --git a/nova/api/__init__.py b/nova/api/__init__.py
index b9b9e3988f..9f116dadad 100644
--- a/nova/api/__init__.py
+++ b/nova/api/__init__.py
@@ -21,6 +21,7 @@ Root WSGI middleware for all API controllers.
 """
 
 import routes
+import webob.dec
 
 from nova import wsgi
 from nova.api import ec2
@@ -32,6 +33,18 @@ class API(wsgi.Router):
 
     def __init__(self):
         mapper = routes.Mapper()
+        mapper.connect("/", controller=self.versions)
         mapper.connect("/v1.0/{path_info:.*}", controller=rackspace.API())
         mapper.connect("/ec2/{path_info:.*}", controller=ec2.API())
         super(API, self).__init__(mapper)
+
+    @webob.dec.wsgify
+    def versions(self, req):
+        """Respond to a request for all OpenStack API versions."""
+        response = {
+                "versions": [
+                    dict(status="CURRENT", id="v1.0")]}
+        metadata = {
+            "application/xml": {
+                "attributes": dict(version=["status", "id"])}}
+        return wsgi.Serializer(req.environ, metadata).to_content_type(response)