Rust

Add Header Field to MIME Sub-Header in Email

See more Email Object Examples

Demonstrates how to add a header field to one of the attachment sub-headers in an email. Rust

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

let email = chilkat::Email::new();

email.set_subject("test");
let _ = email.add_to("Chilkat", "support@chilkatsoft.com");
email.set_from("Matt <matt@example.com>");
email.set_body("This is a simple plain-text body.");

if email.add_file_attachment2("qa_data/1.HPM", "application/x-hprimnet").is_err() {
    println!("{}", email.last_error_text());
    return;
}

// Add a "ContentDescription: HPM/3.0" in the attachment's sub-header.
// The 1st attachment is at index 0.
email.add_attachment_header(0, "Content-Description", "HPM/3.0");

// Show the email MIME:
println!("{}", email.get_mime().unwrap_or_default());

// This is the output:

// MIME-Version: 1.0
// Date: Wed, 16 Jan 2019 10:05:18 -0600
// Message-ID: <93B88835586270B7BE5202F84E171F29C10BA935@CHILKATSLICE>
// Content-Type: multipart/mixed; boundary="------------000502000000020502010608"
// X-Priority: 3 (Normal)
// Subject: test
// To: Chilkat <support@chilkatsoft.com>
// From: Matt <matt@example.com>
// 
// --------------000502000000020502010608
// Content-Type: text/plain; charset=us-ascii; format=flowed
// Content-Transfer-Encoding: 7bit
// 
// This is a simple plain-text body.
// --------------000502000000020502010608
// Content-Type: application/x-hprimnet; name="1.HPM"
// Content-Transfer-Encoding: base64
// Content-Disposition: attachment; filename="1.HPM"
// Content-Description: HPM/3.0
// 
// FILE_DATA_IS_HERE...
// 
// --------------000502000000020502010608--