Re: bug#23750: 25.0.95; bug in url-retrieve or json.el

[Dmitry Gutov]

On 02.12.2016 18:31, Lars Ingebrigtsen wrote:

> Normal web applications require that you URL-encode (or similar) any
> data you send to them.  These encodings are ASCII only.
>
> Here's a typical example of how this is used:
>
>    (let ((url-request-method "POST")
>          (url-request-extra-headers
>           (list (cons "Content-Type"
>                       (concat "multipart/form-data; boundary="
>                               boundary))))
>          (url-request-data
>           (mm-url-encode-multipart-form-data values boundary)))

Thanks!

> The output from mm-url-encode-multipart-form-data is ASCII, and is
> typically multibyte.

If we make the proposed change, this function will violate the contract 
on url-request-data (if the described above is its main use case).

Luckily, this function is part of Emacs, so we can fix it in the same patch.