Node.js

Get an Attachment's Bytes into a BinData

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Demonstrates the Chilkat Email.GetAttachmentBd method, which copies an attachment's binary data into a BinData object. The first attachment is at index 0. This example adds an attachment and copies its bytes into a BinData, printing the byte count.

Background: This is the safe, binary way to extract an attachment — the counterpart to the text-oriented GetAttachmentString. Because attachments are often binary (PDFs, images, archives), copying the raw bytes into a BinData preserves them exactly, ready to write to a file, hash, or pass to another API without any charset conversion that could corrupt the data.

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Node.js

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function chilkatExample() {

    var success = false;

    //  Demonstrates the GetAttachmentBd method, which copies an attachment's binary data into a
    //  BinData object.  The first attachment is at index 0.

    var email = new chilkat.Email();
    email.Subject = "GetAttachmentBd example";

    email.AddStringAttachment("notes.txt","Some notes stored in the attachment.");

    //  Copy the first attachment's binary data into a BinData object.
    var bd = new chilkat.BinData();
    success = email.GetAttachmentBd(0,bd);
    if (success == false) {
        console.log(email.LastErrorText);
        return true;
    }

    console.log("Attachment size (bytes) = " + bd.NumBytes);

}

chilkatExample();