dev server warning

Author: alexcjohnson

dash/dash.py

@@ -1599,7 +1599,9 @@ def verify_url_part(served_part, url_part, part_name):
             else:
                 display_url = (protocol, host, ":{}".format(port), path)
 
-            self.logger.info("Running on %s://%s%s%s", *display_url)
+            self.logger.info("Dash is running on %s://%s%s%s\n", *display_url)
+            self.logger.info(" Warning: This is a development server. Do not use app.run_server")
+            self.logger.info(" in production, use a production WSGI server like gunicorn instead.\n")
 
         if not os.environ.get("FLASK_ENV"):
             os.environ["FLASK_ENV"] = "development"

tests/unit/test_configs.py

@@ -264,7 +264,7 @@ def test_no_proxy_success(mocker, caplog, empty_environ):
 
     app.run_server(port=8787)
 
-    assert "Running on http://127.0.0.1:8787/\n" in caplog.text
+    assert "Dash is running on http://127.0.0.1:8787/\n" in caplog.text
 
 
 @pytest.mark.parametrize(
@@ -284,7 +284,7 @@ def test_proxy_success(mocker, caplog, empty_environ, proxy, host, port, path):
 
     app.run_server(proxy=proxystr, host=host, port=port)
 
-    assert "Running on {}{}\n".format(proxy, path) in caplog.text
+    assert "Dash is running on {}{}\n".format(proxy, path) in caplog.text
 
 
 def test_proxy_failure(mocker, empty_environ):