http: added service backend for testing communication, and extracting vcsserver version

via remote calls.

vcsserver/http_main.py

@@ -182,6 +182,7 b' class HTTPApplication(object):'
             name='msgpack',
             factory=self._msgpack_renderer_factory)
 
+        self.config.add_route('service', '/_service')
         self.config.add_route('status', '/status')
         self.config.add_route('hg_proxy', '/proxy/hg')
         self.config.add_route('git_proxy', '/proxy/git')
@@ -191,6 +192,9 b' class HTTPApplication(object):'
 
         self.config.add_view(
             self.status_view, route_name='status', renderer='json')
+        self.config.add_view(
+            self.service_view, route_name='service', renderer='msgpack')
+
         self.config.add_view(self.hg_proxy(), route_name='hg_proxy')
         self.config.add_view(self.git_proxy(), route_name='git_proxy')
         self.config.add_view(
@@ -249,6 +253,19 b' class HTTPApplication(object):'
     def status_view(self, request):
         return {'status': 'OK'}
 
+    def service_view(self, request):
+        import vcsserver
+        payload = msgpack.unpackb(request.body, use_list=True)
+        resp = {
+            'id': payload.get('id'),
+            'result': dict(
+                version=vcsserver.__version__,
+                config={},
+                payload=payload,
+            )
+        }
+        return resp
+
     def _msgpack_renderer_factory(self, info):
         def _render(value, system):
             value = msgpack.packb(value)