JavaScript

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.

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.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.

var mime = new CkMime();

success = mime.SetBodyFromFile("qa_data/photo.jpg");
if (success == false) {
    console.log(mime.LastErrorText);
    return;
}

//  Append the serialized MIME bytes to a BinData.  Existing bytes are preserved.
var bd = new CkBinData();
success = mime.GetMimeBd(bd);
if (success == false) {
    console.log(mime.LastErrorText);
    return;
}

console.log("Serialized " + bd.NumBytes + " bytes.");