Bug #13649: Net::IMAP doesn't support response from a Microsoft Exchange server (which is not compliant with RFC standards)

• Status: Closed
• Assignee: shugo (Shugo Maeda)
• Target version: -
• ruby -v: 2.3.1
• Backport: 2.2: WONTFIX, 2.3: DONE, 2.4: DONE

[keysen (Jérémy Carlier)]

Hello,

This day I wanted to use a mailbox hosted on a Microsoft Exchange server and it was not working.
I found this nice article relating the issue: http://claudiofloreani.blogspot.fr/2012/01/monkeypatching-ruby-imap-class-to-build.html

My solution to support those crappy server:

module Net
  class IMAP
    class ResponseParser
      def response
        token = lookahead
        case token.symbol
        when T_PLUS
          result = continue_req
        when T_STAR
          result = response_untagged
        else
          result = response_tagged
        end
        match(T_SPACE) if lookahead.symbol == T_SPACE
        match(T_CRLF)
        match(T_EOF)
        return result
      end
    end
  end
end

Step to reproduce: (require an horrible server :))

imap_connexion = Net::IMAP.new(localhost, 993, true, nil, false)
imap_connexion.status('INBOX', ["UIDNEXT", "UIDVALIDITY"])

Then the server should reply with:
"* STATUS INBOX (UIDNEXT 1 UIDVALIDITY 1585372) \r\n"

And the bug occurs because we have a space at the end of the line which is not in the RFC, but as usual Microsoft makes its own RFC...

If you have any questions, suggestions just ask, if I can help.

[naruse (Yui NARUSE)]

• Status changed from Open to Assigned
• Assignee set to shugo (Shugo Maeda)

[shugo (Shugo Maeda)]

• Status changed from Assigned to Closed

Applied in changeset trunk|r59372.

---

lib/net/imap.rb: Ignore trailing space for Microsoft Exchange Server

Based on the patch by keysen (Jérémy Carlier).
[ruby-core:81641] [Bug #13649]

[usa (Usaku NAKAMURA)]

• Backport changed from 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN to 2.2: WONTFIX, 2.3: REQUIRED, 2.4: REQUIRED

[nagachika (Tomoyuki Chikanaga)]

• Backport changed from 2.2: WONTFIX, 2.3: REQUIRED, 2.4: REQUIRED to 2.2: WONTFIX, 2.3: REQUIRED, 2.4: DONE

ruby_2_4 r61369 merged revision(s) 59372.

[usa (Usaku NAKAMURA)]

• Backport changed from 2.2: WONTFIX, 2.3: REQUIRED, 2.4: DONE to 2.2: WONTFIX, 2.3: DONE, 2.4: DONE

ruby_2_3 r62131 merged revision(s) 59372.