Swift

Serialize MIME to BinData

Demonstrates the Chilkat Mime.GetMimeBd method, which serializes the complete MIME entity and appends its bytes to a BinData. The only argument is the BinData; existing bytes are preserved.

Note: The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

Background: This is the byte-exact serializer — the right choice when the MIME carries binary content such as an image or an 8-bit-encoded part, where routing the output through a text string could corrupt it. The result is a faithful byte stream you can write to a file, transmit, or hash. It pairs with LoadMimeBd for lossless round-tripping of binary MIME.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Mime.GetMimeBd method, which serializes the complete MIME entity and appends
    //  its bytes to a BinData.  The only argument is the BinData.  Use this when arbitrary binary body
    //  bytes must not pass through a text string.

    let mime = CkoMime()!

    success = mime.setBody(fromFile: "qa_data/photo.jpg")
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    //  Append the serialized MIME bytes to a BinData.  Existing bytes are preserved.
    let bd = CkoBinData()!
    success = mime.getBd(bindat: bd)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    print("Serialized \(bd.numBytes.intValue) bytes.")

}