hgweb: use a multidict for holding query string parameters...
hgweb: use a multidict for holding query string parameters
My intention with refactoring the WSGI code was to make it easier
to read. I initially wanted to vendor and use WebOb, because it seems
to be a pretty reasonable abstraction layer for WSGI. However, it isn't
using relative imports and I didn't want to deal with the hassle of
patching it. But that doesn't mean we can't use good ideas from WebOb.
WebOb has a "multidict" data structure for holding parsed query string
and POST form data. It quacks like a dict but allows you to store
multiple values for each key. It offers mechanisms to return just one
value, all values, or return 1 value asserting that only 1 value is
set. I quite like its API.
This commit implements a read-only "multidict" in the spirit of
WebOb's multidict.
We replace the query string attributes of our parsed request with
an instance of it.
Differential Revision:
https://phab.mercurial-scm.org/D2776
