parse_qs(Req :: cowboy_req:req()) -> [{Key :: binary(), Value :: binary() | true}]
cowboy_req:parse_qs - Parse the query string
parse_qs(Req :: cowboy_req:req()) -> [{Key :: binary(), Value :: binary() | true}]
Parse the query string as a list of key/value pairs.
The Req object.
The parsed query string is returned as a list of key/value pairs.
The key is a binary string. The value is either a binary string,
or the atom true. Both key and value are case sensitive.
The atom true is returned when a key is present in the query
string without a value. For example, in the following URIs
the key <<"edit">> will always have the value true:
/posts/42?edit
/posts/42?edit&exclusive=1
/posts/42?exclusive=1&edit
/posts/42?exclusive=1&edit&from=web
2.0: The parsed value is not longer cached in the Req object.
2.0: Only the parsed query string is returned, it is no longer wrapped in a tuple.
2.0: Function introduced. Replaces qs_val/1 and qs_vals/1.
ParsedQs = cowboy_req:parse_qs(Req), AtomsQs = [{binary_to_existing_atom(K, latin1), V} || {K, V} <- ParsedQs].