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(MFC) Build a multipart/related MIME MessageDemonstrates how to construct a multipart/related MIME message containing HTML and a related JPG image.
#include <CkMime.h> #include <CkCrypt2.h> #include <CkStringBuilder.h> #include <CkFileAccess.h> #include <CkByteData.h> void ChilkatSample(void) { CkString strOut; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. bool success; // Start with an empty MIME object... CkMime 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. CkCrypt2 crypt; crypt.put_EncodingMode("hex"); CkStringBuilder sbContentId; sbContentId.Append("part1."); sbContentId.Append(crypt.genRandomBytesENC(4)); sbContentId.Append("."); sbContentId.Append(crypt.genRandomBytesENC(4)); sbContentId.Append("@chilkatsoft.com"); // Create the HTML body. CkStringBuilder sbHtml; 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. <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. CkMime htmlMime; htmlMime.SetBodyFromHtml(sbHtml.getAsString()); htmlMime.put_Encoding("8bit"); htmlMime.put_Charset("utf-8"); // Load our JPG image from a file. CkFileAccess fac; CkByteData jpgBytes; success = fac.ReadEntireFile("qa_data/jpg/starfish20.jpg",jpgBytes); // Create an image/jpeg MIME part. CkMime jpgMime; jpgMime.SetBodyFromBinary(jpgBytes); // 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.put_ContentType("image/jpeg"); jpgMime.put_Name("starfish20.jpg"); jpgMime.put_Encoding("base64"); jpgMime.put_Disposition("inline"); jpgMime.put_Filename("starfish20.jpg"); CkStringBuilder sbContentIdHdr; 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); strOut.append(mime.getMime()); strOut.append("\r\n"); // -------------------------------------------------------------- // -------------------------------------------------------------- // 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. <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-- // SetDlgItemText(IDC_EDIT1,strOut.getUnicode()); } |
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