Rust

Get the Nth Text Part of a Given Content-Type

Demonstrates the Chilkat Email.GetNthTextPartOfType method, which returns the text content of the Nth non-multipart MIME part matching a Content-Type pattern. The arguments are a zero-based index among the matching parts, the content-type pattern, an inlineOnly flag, and an excludeAttachments flag. This example retrieves the first text/html part.

Background: A MIME message is a tree of parts, and sometimes you want a specific one by its type rather than by walking alternatives or bodies. The content-type pattern can be exact (text/html) or a wildcard (text/*), and the two boolean flags narrow the search — inlineOnly restricts to inline (displayed) parts, and excludeAttachments skips parts marked as attachments — so you can target exactly the text you care about.

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Rust

// Demonstrates the GetNthTextPartOfType method, which returns the text content of the Nth
// non-multipart MIME part matching a Content-Type pattern.  The first argument is the zero-based
// index among matching parts, the second is the Content-Type pattern, the third is inlineOnly, and the fourth is
// excludeAttachments.

let email = chilkat::Email::new();
email.set_subject("GetNthTextPartOfType example");

email.set_text_body("This is the plain-text version.", "text/plain");
let _ = email.add_html_alternative_body("<html><body>This is the HTML version.</body></html>");

// Get the first (index 0) part whose content type matches text/html.
let html_part = email.get_nth_text_part_of_type(0, "text/html", false, false).unwrap_or_default();
println!("First text/html part:");
println!("{}", html_part);