CODEWITHSUNDEEP
ruby-on-railsrubyemail
Simmo
Simmo

Reputation: 1719

How do I replace an attachment in an email with the Rails mail gem?

My program is dealing with emails which arrive as files (something.eml). In some circumstances I need to amend an attachment and then resave the file. I've been using the instructions here as a basis for my code, but there's no suggestion for trying to do exactly what I'd like. The code I have below successfully removes the original attachment and then tries to add in a new one. 

@email.without_attachments!
@email.add_file(amended_version)

Unfortunately it goes wrong in two places. Firstly it seems to remove all mime parts, not just attachments. Any text/plain sections are also ditched. Secondly, if I test by reloading my amended .eml file, the attachment is no longer recognised, despite being in the file.

I've included a gist which includes the original and amended files from my current method.

Is there a better way to do this? Perhaps a way of replacing the attachment directly rather than get rid of it and adding again?

Upvotes: 3

Views: 743

Answers (1)

Simmo
Simmo

Reputation: 1719

I don't know enough about mail formatting to know why this works, but it does.

I extracted just the line I was interested in from the without_attachments! method and it now seems to work fine. The non-attachment parts of the message are kept intact and the message re-reads fine. Code now reads....

@email.parts.delete_if { |p| p.attachment? }
@email.add_file(amended_version)

Upvotes: 3

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