JavaScript

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.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

JavaScript

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 CkBinData();
success = bd.LoadFile("qa_data/photo.jpg");
if (success == false) {
    console.log(bd.LastErrorText);
    return;
}

var mime = new CkMime();

//  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.");