Zig

Get the Complete MIME Header of an Email

Demonstrates the read-only Chilkat Email.Header property, which returns the complete MIME header generated from the current in-memory email object. Because this property is read-only, you modify individual fields through their corresponding properties or header methods rather than assigning to Header directly. This example sets a subject, from, and recipient, then prints the full MIME header.

Background: A MIME email is made of two parts separated by a single blank line: the header and the body. The header is a list of Field-Name: value lines — familiar ones include From, To, Subject, and Date, plus structural fields like Content-Type and MIME-Version. Reading the raw header is useful for debugging exactly what a message will look like on the wire.

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Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // Demonstrates the read-only Email.Header property, which returns the
    // complete MIME header of the email, generated from the current in-memory
    // email object.

    const email = try chilkat.Email.init();
    defer email.deinit();

    email.setSubject("Test subject");
    email.setFrom("mary@example.com");
    email.addTo("Joe", "joe@example.com") catch {};

    // Header is read-only.  Modify individual fields through their properties
    // or header methods rather than assigning to Header.
    std.debug.print("{s}\n", .{try email.getHeader(alloc)});
}