Swift

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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Swift


func chilkatTest() {
    var success: Bool = false

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

    let email = CkoEmail()!
    email.subject = "GetAttachmentBd example"

    email.addStringAttachment(fileName: "notes.txt", str: "Some notes stored in the attachment.")

    //  Copy the first attachment's binary data into a BinData object.
    let bd = CkoBinData()!
    success = email.getAttachmentBd(index: 0, binData: bd)
    if success == false {
        print("\(email.lastErrorText!)")
        return
    }

    print("Attachment size (bytes) = \(bd.numBytes.intValue)")

}