Java

Get an Attachment's Bytes into a BinData

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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Chilkat2 Java

import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Email;

public class ChilkatExample {

    public static void main(String[] args) {
        // Demonstrates the GetAttachmentBd method, which copies an attachment's binary data into a
        // BinData object.  The first attachment is at index 0.

        Email email = new Email();
        email.setSubject("GetAttachmentBd example");

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

        // Copy the first attachment's binary data into a BinData object.
        BinData bd = new BinData();
        try {
            email.getAttachmentBd(0, bd);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println("Attachment size (bytes) = " + bd.getNumBytes());
    }
}