Zig

Zip an Email's Attachments into One File

Demonstrates the Chilkat Email.ZipAttachments method, which replaces all of an email's attachments with a single Zip file attachment having the specified filename. The original attachments are removed and packed into the Zip. This example adds two attachments and zips them into one.

Background: Bundling multiple attachments into a single .zip keeps a message tidy, compresses the payload, and works around recipients or gateways that limit the number of attachments. Note that the filename here (files.zip) names the attachment inside the message — it is not a path on disk. The reverse operation is UnzipAttachments.

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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 ZipAttachments method, which replaces all of an email's attachments
    // with a single Zip file attachment having the specified filename.  The original
    // attachments are removed and packed into the Zip.

    const email = try chilkat.Email.init();
    defer email.deinit();
    email.setSubject("Zip the attachments");

    email.addStringAttachment("a.txt", "first attachment") catch {};
    email.addStringAttachment("b.txt", "second attachment") catch {};
    std.debug.print("NumAttachments before = {d}\n", .{email.getNumAttachments()});

    // Replace all attachments with a single Zip attachment named "files.zip".
    email.zipAttachments("files.zip") catch {
        std.debug.print("{s}\n", .{try email.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("NumAttachments after = {d}\n", .{email.getNumAttachments()});
}