Rust
Create multipart/alternative MIME

Demonstrates how to create a multipart/alternative MIME structure using the NewMultipartAlternative method.
Chilkat Rust Downloads

Rust

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

// Start with an empty MIME object...
let mime = chilkat::Mime::new();

// Initialize it as multipart/alternative.
let _ = mime.new_multipart_alternative();

// Create a text/plain part.
let pt_mime = chilkat::Mime::new();
let _ = pt_mime.set_body_from_plain_text("This is the plain text body.");
println!("{}", pt_mime.get_mime().unwrap_or_default());
println!("****");

// The text/plain part looks like this:

// 	Content-Type: text/plain
// 	Content-Transfer-Encoding: 7bit
// 
// 	This is the plain text body.

// Create a text/HTML part.
let html_mime = chilkat::Mime::new();
let _ = html_mime.set_body_from_html("<html><body><p>This is the <b>HTML body</b></p></body></html>");
println!("{}", html_mime.get_mime().unwrap_or_default());
println!("****");

// The text/html part looks like this:

// 	Content-Type: text/html
// 	Content-Transfer-Encoding: 7bit
// 
// 	<html><body><p>This is the <b>HTML body</b></p></body></html>

// Add both parts as children of the multipart/alternative
let _ = mime.append_part(&pt_mime);
let _ = mime.append_part(&html_mime);
println!("{}", mime.get_mime().unwrap_or_default());

// This the result.  The boundary string was automatically generaetd.

// 	Content-Type: multipart/alternative; boundary="------------080803090906030708030908"
// 
// 	--------------080803090906030708030908
// 	Content-Type: text/plain
// 	Content-Transfer-Encoding: 7bit
// 
// 	This is the plain text body.
// 	--------------080803090906030708030908
// 	Content-Type: text/html
// 	Content-Transfer-Encoding: 7bit
// 
// 	<html><body><p>This is the <b>HTML body</b></p></body></html>
// 	--------------080803090906030708030908--