Zig

Get a Header Field by Name

Demonstrates the Chilkat Email.GetHeaderField method, which returns the value of a header field by name. Header-field names are case-insensitive, so X-Priority and x-priority refer to the same field. This example reads several headers by name.

Background: Looking up a header by name is the quickest way to read a known field like Subject or a custom X- header. One caveat: some header names (such as Received) can legitimately appear more than once. When a field may repeat and you need every occurrence, enumerate by index with GetHeaderFieldName and GetHeaderFieldValue instead of looking up by name.

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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 GetHeaderField method, which returns the value of a header field by
    // name.  Header-field names are case-insensitive.

    const email = try chilkat.Email.init();
    defer email.deinit();
    email.setSubject("Quarterly report");
    email.setFrom("alice@example.com");
    email.addHeaderField("X-Priority", "1");

    // Get header field values by name.
    std.debug.print("Subject = {s}\n", .{try email.getHeaderField(alloc, "Subject")});
    std.debug.print("From = {s}\n", .{try email.getHeaderField(alloc, "From")});
    std.debug.print("X-Priority = {s}\n", .{try email.getHeaderField(alloc, "x-priority")});
}