FILEUPLOAD-274: RFC 5987 compliance

[anselm94]

RFC 5987 adds support for encoding mechanism for use in MIME headers in HTTP headers. It recommends following formats

• ASCII charset: <paramname>: <paramvalue>
• Non ASCII Charset: <paramname>*: <charset>'<lang>'<percent-encoded>

The specification has following things to say

• RFC 2231 - MIME Type extension for Email and other protocols to support multiple charsets and languages. (Having Asterisks (*) at the end of parameter name for extensions)

• RFC 5987 - Extends on RFC 2231 for extended charsets and languages, but restricts charsets to UTF-8 and ISO-8859-1 and no continuations (multiple extensions for same param name) as HTTP headers has no limitations in header size

• RFC 7578 - Extends on RFC 5987 specifically for multipart/form-data, but rejects usage of Asterisks (*)

[anselm94]

Still some of the older implementations like Apache OpenCMIS Chemistry libraries uses RFC 5987 (formulated in 2010), as RFC 7578 came later in 2015. The library has both server and clients, which breaks currently without RFC 7578 for an experimental implementation of Streaming support via Commons-FileUpload.
If the library has to be patched, then all the clients & server implementations have to migrate to the latest patch, which is not practical

[coveralls]

Coverage increased (+0.5%) to 79.35% when pulling 1a8a103 on anselm94:FILEUPLOAD-274-RFC5987-compliance into e8124ca on apache:master.

[anselm94]

@team any update on this PR?

[kinow]

Hi @anselm94 I had a quick read at the issue and the code, but I feel like I would need more time to read more of both RFC's mentioned in the JIRA issue to be able to review the code.

Given this is the last few days of the year before holidays, I think others might be busy preparing everything at work for the long holiday ahead.

So it may take a while to be reviewed by others 👍 I will spend part of my holiday working on open source, including ASF. So I may have time to review this one near NYE.

Cheers
Bruno

[anselm94]

Thanks @kinow for the update. I understand 😄

I was perplexed by complete silence in here and was wondering if I should raise a PR in SVN codeline

Question: When is the next release scheduled for Apache Fileupload ? Or any patches for 1.4?

[kinow]

It depends. It is up to someone volunteering to prepare the release.

You can try sending an e-mail to the dev list too if you'd like.

[anselm94]

Thanks @kinow Will do that