Java

Build a multipart/related MIME Message

See more MIME Examples

Demonstrates how to construct a multipart/related MIME message containing HTML and a related JPG image. Chilkat2 Java

import com.chilkatsoft.chilkat2.Crypt2;
import com.chilkatsoft.chilkat2.FileAccess;
import com.chilkatsoft.chilkat2.Mime;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // Start with an empty MIME object...
        Mime mime = new Mime();

        // Initialize it as multipart/related.
        mime.newMultipartRelated();

        // Set a top-level MIME header field.
        mime.setHeaderField("Subject", "Test HTML email with JPG image.");

        // Generate a Content-ID.  This will contain random data that will allow
        // the HTML's "img" tag to reference the image part in the MIME.
        Crypt2 crypt = new Crypt2();
        crypt.setEncodingMode("hex");

        StringBuilder sbContentId = new StringBuilder();
        sbContentId.append("part1.");
        sbContentId.append(crypt.genRandomBytesENC(4));
        sbContentId.append(".");
        sbContentId.append(crypt.genRandomBytesENC(4));
        sbContentId.append("@chilkatsoft.com");

        // Create the HTML body.
        StringBuilder sbHtml = new StringBuilder();
        sbHtml.append("<html><head>\r\n");
        sbHtml.append("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n");
        sbHtml.append("  </head>\r\n");
        sbHtml.append("  <body bgcolor=\"#FFFFFF\" text=\"#000000\">\r\n");
        sbHtml.append("    <p>This is a test.&nbsp; <img src=\"cid:CONTENT_ID\" height=\"20\" width=\"20\"></p>\r\n");
        sbHtml.append("  </body>\r\n");
        sbHtml.append("</html>\r\n");
        int numReplacements = sbHtml.replace("CONTENT_ID", sbContentId.getAsString());

        // Create the HTML MIME part.
        Mime htmlMime = new Mime();
        htmlMime.setBodyFromHtml(sbHtml.getAsString());
        htmlMime.setEncoding("8bit");
        htmlMime.setCharset("utf-8");

        // Load our JPG image from a file.
        FileAccess fac = new FileAccess();

ERROR: Invalid type for Chilkat2 Java: pbytes
ERROR: Method not in Chilkat2 Java: FileAccess.ReadEntireFile
        jpgBytes = fac.ERROR();

        // Create an image/jpeg MIME part.
        Mime jpgMime = new Mime();
ERROR: Method not in Chilkat2 Java: Mime.SetBodyFromBinary
        jpgMime.ERROR();
        // Setting the following properties has the effect of adding
        // the Content-Type, Content-Transfer-Encoding, and Content-Disposition header fields.
        // These header fields could also be set via the SetHeaderField method, in which case
        // the values of the affected properties would be updated.
        jpgMime.setContentType("image/jpeg");
        jpgMime.setName("starfish20.jpg");
        jpgMime.setEncoding("base64");
        jpgMime.setDisposition("inline");
        jpgMime.setFilename("starfish20.jpg");

        StringBuilder sbContentIdHdr = new StringBuilder();
        sbContentIdHdr.append("<CONTENT_ID>");
        numReplacements = sbContentIdHdr.replace("CONTENT_ID", sbContentId.getAsString());
        jpgMime.setHeaderField("Content-ID", sbContentIdHdr.getAsString());

        // Add both parts as children of the multipart/related
        mime.appendPart(htmlMime);
        mime.appendPart(jpgMime);
        System.out.println(mime.getMime());

        // --------------------------------------------------------------
        // --------------------------------------------------------------
        // This example builds the following MIME message.  The boundary
        // and Content-ID strings contain random data and will be different.

        // Content-Type: multipart/related; boundary="------------A940F1230E6F0105F03DB2CB"
        // Subject: Test HTML email with JPG image.
        //
        // --------------A940F1230E6F0105F03DB2CB
        // Content-Type: text/html; charset="utf-8"
        // Content-Transfer-Encoding: 8bit
        //
        // <html><head>
        // <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
        //   </head>
        //   <body bgcolor="#FFFFFF" text="#000000">
        //     <p>This is a test.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
        //   </body>
        // </html>
        //
        // --------------A940F1230E6F0105F03DB2CB
        // Content-Transfer-Encoding: base64
        // Content-Type: image/jpeg; name="starfish20.jpg"
        // Content-Disposition: inline; filename="starfish20.jpg"
        // Content-ID: <part1.E16AE3B4.1505C436@chilkatsoft.com>
        //
        // /9j/4AAQSkZJRgABAQEASABIAAD//gAmRmlsZSB3cml0dGVuIGJ5IEFkb2JlIFBob3Rvc2hvcD8g
        // NC4w/9sAQwAQCwwODAoQDg0OEhEQExgoGhgWFhgxIyUdKDozPTw5Mzg3QEhcTkBEV0U3OFBtUVdf
        // YmdoZz5NcXlwZHhcZWdj/9sAQwEREhIYFRgvGhovY0I4QmNjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj
        // Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj/8IAEQgAFAAUAwERAAIRAQMRAf/EABcAAAMBAAAA
        // AAAAAAAAAAAAAAIDBAX/xAAYAQADAQEAAAAAAAAAAAAAAAABAgMEAP/aAAwDAQACEAMQAAAB2kZY
        // NNEijWKddfTmLgALWH//xAAbEAACAgMBAAAAAAAAAAAAAAABAgMRAAQSE//aAAgBAQABBQL0XqN+
        // pM2aqJGMiqFFCyg7z//EABwRAAICAgMAAAAAAAAAAAAAAAERAAIQIQMSUf/aAAgBAwEBPwHqU5aq
        // Axx+y1tMQl4elj//xAAcEQEAAQUBAQAAAAAAAAAAAAABEQACEBIhA1H/2gAIAQIBAT8B3Bhqy7Zc
        // enyiwmGgDhiOzj//xAAdEAABAwUBAAAAAAAAAAAAAAABAAIREBIhIkFR/9oACAEBAAY/ArZyn+Cg
        // xtxWuJaoCnqDuin/xAAcEAABBAMBAAAAAAAAAAAAAAABABEhYRAxQVH/2gAIAQEAAT8hkEwPUUR9
        // DYfE4nxtRpIkBTsayuALIiuY/9oADAMBAAIAAwAAABDWPTsf/8QAGhEAAwADAQAAAAAAAAAAAAAA
        // AAEREDFBIf/aAAgBAwEBPxC0DVPcWm+Ce4OesrkE6bjH/8QAGBEBAQEBAQAAAAAAAAAAAAAAAREA
        // QRD/2gAIAQIBAT8QahMiOc8YgSrnTY3ELclHXn//xAAcEAEBAAIDAQEAAAAAAAAAAAABEQAhMUFx
        // EFH/2gAIAQEAAT8Qn3igmSZSj+c4N4zapMy9IjFV98wncN2iuLFsCEbDGxQkI6RO/n//2Q==
        //
        // --------------A940F1230E6F0105F03DB2CB--
        //
    }
}