(Node.js) Extract Files from Binary SOAP MTOM MIME

This example demonstrates how to extract files from a binary SOAP MTOM MIME document.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

function chilkatExample() {

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var mime = new chilkat.Mime();

    // In this example, we have a MIME file containing 8bit (non-encoded) binary data,
    // and it is what I call "headless".  MIME is headless when it omits
    // the top-level header.  The file we have here begins with the first
    // boundary string.

    // The structure the MIME to be loaded is:

    // multipart/mixed (inferred because it is headless)
    //     application/xop+xml
    //     image/jpeg
    //     image/gif
    //     image/gif
    // 

    var success = mime.LoadMimeFile("qa_data/mime/headless_binary_soap_mtom_mime.mim");
    if (success !== true) {
        console.log(mime.LastErrorText);
        return;
    }

    // The MIME file loaded in this example contains this:

    // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
    // Content-Type: application/xop+xml; charset=UTF-8; type="application/soap+xml"
    // Content-Transfer-Encoding: binary
    // Content-ID: <root.message@cxf.apache.org>
    // 
    // <soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope"><soap:Body> ... </soap:Body></soap:Envelope>
    // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
    // Content-Type: image/jpeg
    // Content-Transfer-Encoding: binary
    // Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1496@cxf.apache.org>
    // Content-Disposition: attachment;name="-2049913191"
    // 
    // BINARY DATA HERE...
    // 
    // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
    // Content-Type: image/gif
    // Content-Transfer-Encoding: binary
    // Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1497@cxf.apache.org>
    // Content-Disposition: attachment;name="-2049913188"
    // 
    // BINARY DATA HERE...
    // 
    // --uuid:e74486f4-52b0-44b6-b829-156810fae20d
    // Content-Type: image/gif
    // Content-Transfer-Encoding: binary
    // Content-ID: <beee83b7-166c-494c-890a-def990e9887b-1498@cxf.apache.org>
    // Content-Disposition: attachment;name="-2049913185"
    // 
    // BINARY DATA HERE...
    // 
    // --uuid:e74486f4-52b0-44b6-b829-156810fae20d--

    // Get the number of MIME sub-parts.
    var numParts = mime.NumParts;

    // The 1st part at index 0 is the application/xop+xml.  We're just going to extract the JPG and GIF image files..
    var sbFilename = new chilkat.StringBuilder();
    var name;
    var i = 1;
    while (i < numParts) {
        // mp: Mime
        var mp = mime.GetPart(i);

        // By looking at the MIME above, the "name" attribute of the Content-Disposition header field seems
        // to be the only possible name we can use for each image..
        sbFilename.Append("qa_output/");
        name = mp.GetHeaderFieldAttribute("Content-Disposition","name");
        sbFilename.Append(name);
        sbFilename.Append(".");
        sbFilename.Append(mp.ContentType);
        var numReplaced = sbFilename.Replace("image/","");
        mp.SaveBody(sbFilename.GetAsString());
        console.log("output file: " + sbFilename.GetAsString());

        sbFilename.Clear();
        i = i+1;
    }

    console.log("Success.");

}

chilkatExample();