Unicode C
Unicode C
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.Chilkat Unicode C Downloads
#include <C_CkMimeW.h>
#include <C_CkCrypt2W.h>
#include <C_CkStringBuilderW.h>
#include <C_CkFileAccessW.h>
#include <C_CkByteData.h>
void ChilkatSample(void)
{
BOOL success;
HCkMimeW mime;
HCkCrypt2W crypt;
HCkStringBuilderW sbContentId;
HCkStringBuilderW sbHtml;
int numReplacements;
HCkMimeW htmlMime;
HCkFileAccessW fac;
HCkByteData jpgBytes;
HCkMimeW jpgMime;
HCkStringBuilderW sbContentIdHdr;
success = FALSE;
// 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 = CkMimeW_Create();
// Initialize it as multipart/related.
CkMimeW_NewMultipartRelated(mime);
// Set a top-level MIME header field.
CkMimeW_SetHeaderField(mime,L"Subject",L"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.
crypt = CkCrypt2W_Create();
CkCrypt2W_putEncodingMode(crypt,L"hex");
sbContentId = CkStringBuilderW_Create();
CkStringBuilderW_Append(sbContentId,L"part1.");
CkStringBuilderW_Append(sbContentId,CkCrypt2W_genRandomBytesENC(crypt,4));
CkStringBuilderW_Append(sbContentId,L".");
CkStringBuilderW_Append(sbContentId,CkCrypt2W_genRandomBytesENC(crypt,4));
CkStringBuilderW_Append(sbContentId,L"@chilkatsoft.com");
// Create the HTML body.
sbHtml = CkStringBuilderW_Create();
CkStringBuilderW_Append(sbHtml,L"<html><head>\r\n");
CkStringBuilderW_Append(sbHtml,L"<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n");
CkStringBuilderW_Append(sbHtml,L" </head>\r\n");
CkStringBuilderW_Append(sbHtml,L" <body bgcolor=\"#FFFFFF\" text=\"#000000\">\r\n");
CkStringBuilderW_Append(sbHtml,L" <p>This is a test. <img src=\"cid:CONTENT_ID\" height=\"20\" width=\"20\"></p>\r\n");
CkStringBuilderW_Append(sbHtml,L" </body>\r\n");
CkStringBuilderW_Append(sbHtml,L"</html>\r\n");
numReplacements = CkStringBuilderW_Replace(sbHtml,L"CONTENT_ID",CkStringBuilderW_getAsString(sbContentId));
// Create the HTML MIME part.
htmlMime = CkMimeW_Create();
CkMimeW_SetBodyFromHtml(htmlMime,CkStringBuilderW_getAsString(sbHtml));
CkMimeW_putEncoding(htmlMime,L"8bit");
CkMimeW_putCharset(htmlMime,L"utf-8");
// Load our JPG image from a file.
fac = CkFileAccessW_Create();
jpgBytes = CkByteData_Create();
success = CkFileAccessW_ReadEntireFile(fac,L"qa_data/jpg/starfish20.jpg",jpgBytes);
// Create an image/jpeg MIME part.
jpgMime = CkMimeW_Create();
CkMimeW_SetBodyFromBinary(jpgMime,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.
CkMimeW_putContentType(jpgMime,L"image/jpeg");
CkMimeW_putName(jpgMime,L"starfish20.jpg");
CkMimeW_putEncoding(jpgMime,L"base64");
CkMimeW_putDisposition(jpgMime,L"inline");
CkMimeW_putFilename(jpgMime,L"starfish20.jpg");
sbContentIdHdr = CkStringBuilderW_Create();
CkStringBuilderW_Append(sbContentIdHdr,L"<CONTENT_ID>");
numReplacements = CkStringBuilderW_Replace(sbContentIdHdr,L"CONTENT_ID",CkStringBuilderW_getAsString(sbContentId));
CkMimeW_SetHeaderField(jpgMime,L"Content-ID",CkStringBuilderW_getAsString(sbContentIdHdr));
// Add both parts as children of the multipart/related
CkMimeW_AppendPart(mime,htmlMime);
CkMimeW_AppendPart(mime,jpgMime);
wprintf(L"%s\n",CkMimeW_getMime(mime));
// --------------------------------------------------------------
// --------------------------------------------------------------
// 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--
//
CkMimeW_Dispose(mime);
CkCrypt2W_Dispose(crypt);
CkStringBuilderW_Dispose(sbContentId);
CkStringBuilderW_Dispose(sbHtml);
CkMimeW_Dispose(htmlMime);
CkFileAccessW_Dispose(fac);
CkByteData_Dispose(jpgBytes);
CkMimeW_Dispose(jpgMime);
CkStringBuilderW_Dispose(sbContentIdHdr);
}