Use mime type of attachments if present for outgoing emails

[kevin-olbrich]

Infos:

• Used Zammad version: 2.4.0, daily / latest
• Installation method (source, package, ..): package / repo
• Operating system: CentOS 7
• Database + version: -
• Elasticsearch version: 5.x
• Browser + version: -

Expected behavior:

• Setting ["mime-type": "text/calendar;method=REQUEST"] should keep the mime-type

Actual behavior:

• Setting ["mime-type": "text/calendar;method=REQUEST"] results in:

----==_mimepart_5ac4bc01d4a2b_4ec52ae183bdb5e8196795
Content-Type: application/octet-stream; filename="invite.ics"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename="invite.ics"
Content-ID: <5ac4bc01d7ba4_4ec52ae183bdb5e81968dc@example.com.mail>

...content...

----==_mimepart_5ac4bc01d4a2b_4ec52ae183bdb5e8196795--

Steps to reproduce the behavior:

• Send API Request (docs: https://docs.zammad.org/en/latest/api-ticket-article.html) with attachment

Yes I'm sure this is a bug and no feature request or a general question.

[thorsteneckel]

Hi @kevin-olbrich, could you please post an example request of yours?

[kevin-olbrich]

Sure, here we go:

URL: "POST /api/v1/ticket_articles/ HTTP/1.1" 201 None

JSON:

{
    "attachments": [
        {
            "data": "base64-encoded-string",
            "filename": "invite.ics",
            "mime-type": "text/calendar;method=REQUEST"
        }
    ],
    "body": "body-text",
    "content_type": "text/plain",
    "internal": false,
    "subject": "Test - Calendar (Calendar-ID 1234)",
    "ticket_id": "8209",
    "to": "ko@example.com",
    "type": "email"
}

base64-encoded-string is a placeholder for the real base64 text.

[muhammadn]

@kevin-olbrich It works as expected on my Apple mail. I used a working .ics file which i had encoded to base64 and ran the example you gave (with modification to the to: parameter) and i received the email.

.ics file was not corrupted in this case. Are you having some problem opening the .ics file?

[kevin-olbrich]

@muhammadn
I think I need to explain a little more, as the case you have tested, ist not exactly what I have in mind.

Attaching an ics file in my email article is working perfectly (your test case is fine).
What I tried to do, is sending this article as a calendar invitation like you do on Microsoft Exchange.
These e-mails are then shown as calendar invites in Outlook inbox, Google calendar, iPhone, etc.
Using the ics as attachment shows as regular email. Most clients then show that this email also includes an appointment.

An example how to do it in python is located here:
https://stackoverflow.com/questions/4823574/sending-meeting-invitations-with-python

Maybe I got the mime part wrong but zammad does not honor the mime type I specified.