Feature Flags: Generically deal with HTTP-based feature flags.

* Define a default `FEATURE_FLAGS_HTTP` configuration variable that's
  an empty list to help defining http-based feature flags that can be
  used to turn on/off features
* Build macro to include hidden fields for feature flags where
  necessary.
* Extend flask's `url_for` function to deal with defined feature flags
  in a mostly transparent way

1 files changed, 9 insertions, 0 deletions

diff --git a/uploader/templates/macro-forms.html b/uploader/templates/macro-forms.html
new file mode 100644
index 0000000..0ccab32
--- /dev/null
+++ b/uploader/templates/macro-forms.html
@@ -0,0 +1,9 @@
+{%macro add_http_feature_flags()%}
+{%for flag in http_feature_flags():%}
+{%if (request.args.get(flag) or request.form.get(flag) or ""):%}
+<input type="hidden"
+       name="{{flag}}"
+       value="{{(request.args.get(flag) or request.form.get(flag))}}" />
+{%endif%}
+{%endfor%}
+{%endmacro%}