135980 - Support sending files as attachments in mailto: form submit

Status: RESOLVED INVALID

(Core :: DOM: Core & HTML, enhancement, P4)

Description

[John Keiser (jkeiser)]

Currently, as in IE and NS 4.x, mailto: form submission (and the text/plain
encoding) do not encode file data at all, instead just sending the filename.  We
should do better and allow people to send actual files from a webpage without
requiring a server-side CGI.  This would be an immensely useful feature and I
suspect it would not break sites since there is no point in having <input
type=file> in a form that can't have files.

Depends, of course, on bug 61893 being fixed.

Comment 1

[Sven Neuhaus]

This seems like a security issue. The user would have to be warned that he/she is about to send local files in a manner that cannot be overlooked.

Comment 2

[Anne (:annevk)]

This is working as designed per what is currently step 23 of https://html.spec.whatwg.org/#concept-form-submit (see "Mail with headers" and "Mail as body"). In particular for mailto: no serialization is allowed that would encode files.