Node.js

Set a MIME Body from Binary Bytes (BinData)

Demonstrates the Chilkat Mime.SetBodyBd method, which sets the decoded body bytes from a BinData, changes the transfer encoding to base64, and preserves the bytes exactly. The only argument is the BinData.

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 direct way to put arbitrary binary content into a part from memory — a generated image, a decrypted blob — without a temporary file. Chilkat base64-encodes it so the bytes survive text-based transports unchanged. Note it does not set a Content-Type or disposition, so assign those yourself to describe what the bytes are.

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function chilkatExample() {

    var success = false;

    //  Demonstrates the Mime.SetBodyBd method, which sets the decoded body bytes from a BinData,
    //  changes the transfer encoding to base64, and preserves the bytes exactly.  The only argument is
    //  the BinData.

    //  Put the binary body bytes into a BinData.
    var bd = new chilkat.BinData();
    success = bd.LoadFile("qa_data/photo.jpg");
    if (success == false) {
        console.log(bd.LastErrorText);
        return;
    }

    var mime = new chilkat.Mime();

    //  Set a Content-Type for the binary content (SetBodyBd does not set one itself).
    mime.ContentType = "image/jpeg";

    success = mime.SetBodyBd(bd);
    if (success == false) {
        console.log(mime.LastErrorText);
        return;
    }

    console.log("Body set from " + bd.NumBytes + " bytes.");

}

chilkatExample();