JavaScript

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.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

var success = false;

//  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.

var email = new CkEmail();
email.Subject = "Zip the attachments";

email.AddStringAttachment("a.txt","first attachment");
email.AddStringAttachment("b.txt","second attachment");
console.log("NumAttachments before = " + email.NumAttachments);

//  Replace all attachments with a single Zip attachment named "files.zip".
success = email.ZipAttachments("files.zip");
if (success == false) {
    console.log(email.LastErrorText);
    return true;
}

console.log("NumAttachments after = " + email.NumAttachments);