Rust

Get a Header Field of an Attachment

Demonstrates the Chilkat Email.GetAttachmentHeader method, which returns the value of a named header field of an attachment. The first argument is the zero-based attachment index and the second is the MIME header-field name. This example reads the Content-Disposition header of the first attachment.

Background: Each attachment is a MIME part with its own header block. Where GetAttachmentAttr extracts a single named parameter, GetAttachmentHeader returns the entire value of a header field — for example the full Content-Disposition: attachment; filename="notes.txt" line. That is useful for inspecting or debugging exactly how a part is described, including any custom X- headers a sender may have added.

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Rust

// Demonstrates the GetAttachmentHeader method, which returns the value of a header field
// (by name) of an attachment.  The first argument is the zero-based attachment index and the second is the
// MIME header-field name.

let email = chilkat::Email::new();
email.set_subject("Attachment header field");

let _ = email.add_string_attachment("notes.txt", "Some notes.");

// Get the Content-Disposition header of the first attachment (index 0).
let disp = email.get_attachment_header(0, "Content-Disposition").unwrap_or_default();
println!("Attachment 0 Content-Disposition: {}", disp);