Node.js

Unzip an Email's Zip Attachments

See more Email Object Examples

Demonstrates the Chilkat Email.UnzipAttachments method, which unzips and replaces any Zip file attachments with their expanded contents. For example, if an email contains a single Zip holding three files, that Zip attachment is replaced by the three files as individual attachments. This example loads an email and expands its Zip attachments.

Background: Senders often bundle several files into one .zip to keep a message tidy or to compress large content. UnzipAttachments reverses that automatically, so downstream processing can work with the individual files directly rather than having to detect, extract, and re-inject archive contents. It is the inverse of ZipAttachments.

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function chilkatExample() {

    var success = false;

    //  Demonstrates the UnzipAttachments method, which unzips and replaces any Zip file
    //  attachments with their expanded contents.  For example, a single Zip containing 3 files
    //  is replaced by those 3 files as individual attachments.

    var email = new chilkat.Email();

    success = email.LoadEml("qa_data/eml/with_zip_attachment.eml");
    if (success == false) {
        console.log(email.LastErrorText);
        return true;
    }

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

    //  Expand any Zip attachments in place.
    success = email.UnzipAttachments();
    if (success == false) {
        console.log(email.LastErrorText);
        return true;
    }

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

    //  Note: The path "qa_data/..." is a relative local filesystem path,
    //  relative to the current working directory of the running application.

}

chilkatExample();