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Feature/attachment headers #43

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jarrodmoldrich
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@jarrodmoldrich jarrodmoldrich commented Oct 22, 2021

Hi @kalys 👋

In a related PR to thoughtbot/bamboo I've exposed a variable in Bamboo.Attachment called :headers that can pass a number of arbitrary headers as a keyword list, permitting overrides of headers (e.g., Content-Disposition) or adding other special cases (e.g., X-Content-Id). The purpose is to give extra control to the library consumer, and the benefit for me, in particular, is to add inline image attachments that work well in a variety of email clients.

As well as these extra headers, there's a need to reorganize and wrap the inline attachments in a multipart/related part. I'll be pushing another related PR for that to DockYard/elixir-mail shortly, but I also duplicated the changes to the RFC2822Renderer module in this library. The update shouldn't regress any prior behavior, and I feel that the new code is appreciably more legible. From my testing, inline images now work properly in Outlook webmail with this change.

I haven't added anything to test suite yet, but will proceed to work on this PR if I have your blessing. So please let me know!

Cheers,

Jarrod

Related PRs:
beam-community/bamboo#631
DockYard/elixir-mail#137

@kalys
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kalys commented Oct 26, 2021

Hey @jarrodmoldrich.

Thank you for your contribution to the library.

Let's wait until your bamboo PR is merged.

This change in contingent upon an update to the bamboo library to
include a `:headers` key in `Bamboo.Attachment` that holds a keyword
list of headers that will override *all* others.

For e.g., in the specific use-case of adding inlined attachments, some
special case headers are required. Now it's possible to add
`X-Attachment-Id` and override the Content-Disposition header with
`inline` to permit the proper display of inlined content, without an
email client showing them as explicit attachments for the user to
download.
@jarrodmoldrich
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@kalys I'm being asked to wrap up work on the related PRs, so just need you to remind me of one thing. Did you close this because you already added the functionality in another merge?

@kalys
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kalys commented Sep 27, 2024

@jarrodmoldrich Yes. Since then I overhauled generation of the mail body. elixir-mail is not used anymore.

And content-id is supported. https://github.com/kalys/bamboo_ses/blob/master/test/lib/bamboo/adapters/content_raw_test.exs

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2 participants