How to parse attachments

[kbrw]

How to parse attachments

[awetzel]

hello @heri16 :
First use MimeMail.from_string(mail_bin) to get the MimeMail tree struct, of your email, then . This gives you the exact "parsed" version of your email, then you can apply selectively some decode_headers functions to parse on demand some type of headers. And decode_body to decode the body.

m = mail |> MimeMail.decode_body |> MimeMail.Emails.decode_headers
               |> MimeMail.CTParams.decode_headers |> MimeMail.Words.decode_headers

then you can browser the MimeMail tree to get your attachments.

But since the low level API is necessary for DKIM signature for instance, it is cumbersome for basic email parsing. So the MimeMail.Flat module allows you to "flatten" the mimemail tree in order to easily retreive your attachments : instead of having a %Mimemail{headers: [kwlist],body: treeof-MimeMail} you handle a single kwlist (actually the headers kwlist) with the body tree as keyword key-values with special key :txt,:html,:attach,:attach_in,:include according to the shape of the body tree.

For instance, to get an included attachment :

(mail_bin |> MimeMail.from_string |> MimeMail.Flat.from_mail)[:include]

if there are several included attachments :

mail_bin |> MimeMail.from_string |> MimeMail.Flat.from_mail |> Enum.filter(&elem(&1,0) == :include)

[heri16]

A little surprised that attachments don't have a Stream or GenStage based
interface. Nevertheless, thanks for this useful library. Please see my pull
requests.

On Monday, 18 July 2016, Arnaud Wetzel [email protected] wrote:

hello @heri16 https://github.com/heri16 :
First use MimeMail.from_string(mail_bin) to get the MimeMail tree
struct, of your email, then . This gives you the exact "parsed" version of
your email, then you can apply selectively some decode_headers functions
to parse on demand some type of headers. And decode_body to decode the
body.

m = mail |> MimeMail.decode_body |> MimeMail.Emails.decode_headers
|> MimeMail.CTParams.decode_headers |> MimeMail.Words.decode_headers

then you can browser the MimeMail tree to get your attachments.

But since the low level API is necessary for DKIM signature for
instance, it is cumbersome for basic email parsing. So the MimeMail.Flat
module allows you to "flatten" the mimemail tree in order to easily
retreive your attachments : instead of having a %Mimemail{headers:
[kwlist],body: treeof-MimeMail} you handle a single kwlist (actually the
headers kwlist) with the body tree as keyword key-values with special key
:txt,:html,:attach,:attach_in,:include according to the shape of the body
tree.

For instance, to get an included attachment :

(mail_bin |> MimeMail.from_string |> MimeMail.Flat.from_mail)[:include]

if there are several included attachments :

mail_bin |> MimeMail.from_string |> MimeMail.Flat.from_mail |> Enum.filter(&elem(&1,0) == :include)

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