Newline in form data should be encoded as CRLF pair

[dmethvin]

See this post:

​http://forum.jquery.com/topic/encodeuricomponent-isn-t-sufficient-for-encoding-application-x-www-form-urlencoded#14737000001191209

Summary: The .value property of a textarea returns only LF between lines on all browsers but IE/Opera, but the W3C says lines should be delimited by CRLF when the form is submitted.

​http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.1

[dmethvin]

As I read the spec, it seems like *all* line breaks of LF should be replaced with CRLF, which makes the fix easier than special-casing a textarea.

Looks like this could be fixed in serializeArray:

 { name: elem.name, value: val.replace(/\r?\n/g, "\r\n") };

(In two places...)

Another possibility would be to fix it in .val(), which is currently normalizing line endings by removing the CR in browsers where it's present -- IE and Opera. I like that fix better in some ways but am concerned that it will break too much existing code that expects a lone LF.

[addyosmani]

Marking for review and possible inclusion in 1.5.

[Dave Methvin]

When serializing text, encode all line breaks as CRLF pairs per the application/x-www-form-urlencoded specification. Fixes #6876.

Changeset: eed3803c98bf5c074e40aad12f2e91435bf81154

[dmethvin]

#14560 is a duplicate of this ticket.