(Ruby) Rename Email Attachments After Adding

Demonstrates how to rename email attachments after adding but before sending.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

mailman = Chilkat::CkMailMan.new()

mailman.put_SmtpHost("smtp.my-mail-server.com")
mailman.put_SmtpUsername("MY_SMTP_USERNAME")
mailman.put_SmtpPassword("MY_SMTP_PASSWORD")
mailman.put_SmtpSsl(true)
mailman.put_SmtpPort(465)

email = Chilkat::CkEmail.new()

email.put_Subject("This is a test")
email.put_Body("This is a test")
email.put_From("Chilkat Support <support@chilkatsoft.com>")
success = email.AddTo("Chilkat Admin","admin@chilkatsoft.com")
# To add more recipients, call AddTo, AddCC, or AddBcc once per recipient.

# Add some attachments.
# The AddFileAttachment method returns the value of the content-type it chose for the attachment.
contentType = email.addFileAttachment("qa_data/jpg/starfish.jpg")
if (email.get_LastMethodSuccess() != true)
    print email.lastErrorText() + "\n";
    exit
end

contentType = email.addFileAttachment("qa_data/pdf/fishing.pdf")
if (email.get_LastMethodSuccess() != true)
    print email.lastErrorText() + "\n";
    exit
end

# If we save the email to a .eml, we can examine in a text editor.
success = email.SaveEml("qa_output/e1.eml")
if (success == false)
    print email.lastErrorText() + "\n";
    print "Failed to save .eml" + "\n";
    exit
end

# We see the following in the e1.eml
# Notice that Chilkat replaced the full path with just the filename.
# The full local path is not part of the email that gets sent..

# ...
# --------------020807050607070004010609
# Content-Type: image/jpeg; name="starfish.jpg"
# Content-Transfer-Encoding: base64
# Content-Disposition: attachment; filename="starfish.jpg"
# 
# ...
# --------------020807050607070004010609
# Content-Type: application/pdf; name="fishing.pdf"
# Content-Transfer-Encoding: base64
# Content-Disposition: attachment; filename="fishing.pdf"
# ...

# Before sending, each filename can be changed within the email object.
# For example:
success = email.SetAttachmentFilename(0,"orange_starfish.jpg")
success = email.SetAttachmentFilename(1,"tuna_fishing.pdf")

# Look at the new MIME source of the email in a  text editor...
success = email.SaveEml("qa_output/e2.eml")
if (success == false)
    print email.lastErrorText() + "\n";
    print "Failed to save .eml" + "\n";
    exit
end

# You'll see this:

# ...
# --------------020807050607070004010609
# Content-Type: image/jpeg; name="orange_starfish.jpg"
# Content-Transfer-Encoding: base64
# Content-Disposition: attachment; filename="orange_starfish.jpg"
# 
# ...
# --------------020807050607070004010609
# Content-Type: application/pdf; name="tuna_fishing.pdf"
# Content-Transfer-Encoding: base64
# Content-Disposition: attachment; filename="tuna_fishing.pdf"
# ...

# Send the email with the updated filenames..
success = mailman.SendEmail(email)
if (success != true)
    print mailman.lastErrorText() + "\n";
    exit
end

success = mailman.CloseSmtpConnection()
if (success != true)
    print "Connection to SMTP server not closed cleanly." + "\n";
end

print "Mail with attachments sent!" + "\n";