api.v1: don't presume int or float in URLs

since `float` doesn't also catch `int` we don't want to encode every possible permutation (not that many, but the principle stands), just use `string` (default) and handle it later

gwdatafind_server/api/v1.py

@@ -212,12 +212,9 @@ def find_url(ext, site, tag, filename):
     ))
 
 
-@blueprint.route('<ext>/<site>/<tag>/<int:start>,<int:end>')  # for --ping
-@blueprint.route('<ext>/<site>/<tag>/<int:start>,<int:end>.json')
-@blueprint.route('<ext>/<site>/<tag>/<int:start>,<int:end>/<urltype>.json')
-@blueprint.route('<ext>/<site>/<tag>/<float:start>,<float:end>')  # for --ping
-@blueprint.route('<ext>/<site>/<tag>/<float:start>,<float:end>.json')
-@blueprint.route('<ext>/<site>/<tag>/<float:start>,<float:end>/<urltype>.json')
+@blueprint.route('<ext>/<site>/<tag>/<start>,<end>')  # for --ping
+@blueprint.route('<ext>/<site>/<tag>/<start>,<end>.json')
+@blueprint.route('<ext>/<site>/<tag>/<start>,<end>/<urltype>.json')
 @handle_errors_as_json
 @authentication.validate
 def find_urls(ext, site, tag, start, end, urltype=None):
@@ -269,7 +266,7 @@ def _find_urls(ext, site, tag, start, end, urltype=None, match=None,
     cache = get_dataset_cache(ext, site, tag)
 
     # parse file paths
-    search = segment(start, end)
+    search = segment(float(start), float(end))
     lfns = defaultdict(list)
     maxgps = -1e9  # something absurdly old
     for (path, cdur), seglist in cache.items():