make it easier to debug static files

jupyterhub/handlers/static.py

@@ -15,7 +15,9 @@ class CacheControlStaticFilesHandler(StaticFileHandler):
         return None
 
     def set_extra_headers(self, path):
-        if "v" not in self.request.arguments:
+        if "v" not in self.request.arguments or self.settings.get(
+            "no_cache_static", False
+        ):
             self.add_header("Cache-Control", "no-cache")
 
 

testing/jupyterhub_config.py

@@ -19,3 +19,10 @@ c.JupyterHub.spawner_class = SimpleLocalProcessSpawner
 
 # only listen on localhost for testing
 c.JupyterHub.bind_url = 'http://127.0.0.1:8000'
+
+c.JupyterHub.tornado_settings = {
+    "no_cache_static": True,
+}
+
+c.JupyterHub.admin_users = {"admin"}
+c.JupyterHub.allow_all = True