Ruby

Attach a File with an Explicit Content Type

Demonstrates the Chilkat Email.AddFileAttachment2 method, which attaches a file from the filesystem and lets you explicitly specify its content type rather than having Chilkat infer it from the file extension. This example attaches a binary file as application/octet-stream.

Background: Extension-based type detection is convenient but not always right — a file may have an unusual or missing extension, or you may need a very specific MIME type for the recipient to process it correctly. Specifying the content type explicitly removes the guesswork. application/octet-stream is the generic "arbitrary binary data" type, a safe default that tells the client to treat the attachment as an opaque download rather than trying to render it.

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Ruby

require 'chilkat'

success = false

#  Demonstrates the AddFileAttachment2 method, which attaches a file and lets you
#  explicitly specify its content type instead of letting Chilkat infer it.

email = Chilkat::CkEmail.new()
email.put_Subject("Email with a file attachment")
email.put_Body("Please see the attached file.")

#  Attach a file, explicitly specifying the content type.
success = email.AddFileAttachment2("qa_data/attachments/data.bin","application/octet-stream")
if (success == false)
    print email.lastErrorText() + "\n";
    exit
end

print "NumAttachments = " + email.get_NumAttachments().to_s() + "\n";

#  Note: The path "qa_data/attachments/data.bin" is a relative local filesystem path,
#  relative to the current working directory of the running application.