`Plug.Parsers` Incorrectly parse request body for array field about plug HOT 4 CLOSED

decode is for URI segments. You want to compare it with decode_query instead:

iex(7)> URI.decode_query "foo="
%{"foo" => ""}

from plug.

According to the spec, foo is the same as foo= but that’s not how it worked before. So this was a bug fix applied to both Elixir and Plug.

from plug.

Ok, so this is expected behavior?

But when I run this on latest elixir 1.13.3-otp-24, it gives different results.

iex(1)> URI.decode("files%5B%5D")
"files[]"

iex(2)> URI.decode("foo")
"foo"
iex(3)> URI.decode("foo=")
"foo=

from plug.

Closing this per the above.

from plug.