Zig
Zig
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 Zig Downloads
const std = @import("std");
const chilkat = @import("chilkat");
pub fn main(init: std.process.Init) !void {
const alloc = init.arena.allocator();
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// Start with an empty MIME object...
const mime = try chilkat.Mime.init();
defer mime.deinit();
// Initialize it as multipart/related.
mime.newMultipartRelated() catch {};
// Set a top-level MIME header field.
mime.setHeaderField("Subject", "Test HTML email with JPG image.") catch {};
// 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.
const crypt = try chilkat.Crypt2.init();
defer crypt.deinit();
crypt.setEncodingMode("hex");
const sb_content_id = try chilkat.StringBuilder.init();
defer sb_content_id.deinit();
sb_content_id.append("part1.") catch {};
sb_content_id.append(try crypt.genRandomBytesENC(alloc, 4)) catch {};
sb_content_id.append(".") catch {};
sb_content_id.append(try crypt.genRandomBytesENC(alloc, 4)) catch {};
sb_content_id.append("@chilkatsoft.com") catch {};
// Create the HTML body.
const sb_html = try chilkat.StringBuilder.init();
defer sb_html.deinit();
sb_html.append("<html><head>\r\n") catch {};
sb_html.append("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\">\r\n") catch {};
sb_html.append(" </head>\r\n") catch {};
sb_html.append(" <body bgcolor=\"#FFFFFF\" text=\"#000000\">\r\n") catch {};
sb_html.append(" <p>This is a test. <img src=\"cid:CONTENT_ID\" height=\"20\" width=\"20\"></p>\r\n") catch {};
sb_html.append(" </body>\r\n") catch {};
sb_html.append("</html>\r\n") catch {};
var num_replacements: i32 = sb_html.replace("CONTENT_ID", try sb_content_id.getAsString(alloc));
// Create the HTML MIME part.
const html_mime = try chilkat.Mime.init();
defer html_mime.deinit();
html_mime.setBodyFromHtml(try sb_html.getAsString(alloc)) catch {};
html_mime.setEncoding("8bit");
html_mime.setCharset("utf-8");
// Load our JPG image from a file.
const fac = try chilkat.FileAccess.init();
defer fac.deinit();
ERROR: Method not in the Zig package: FileAccess.ReadEntireFile
ERROR: Method not in the Zig package: FileAccess.ReadEntireFile
jpg_bytes = fac.ERROR();
// Create an image/jpeg MIME part.
const jpg_mime = try chilkat.Mime.init();
defer jpg_mime.deinit();
ERROR: Method not in the Zig package: Mime.SetBodyFromBinary
_ = jpg_mime.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.
jpg_mime.setContentType("image/jpeg");
jpg_mime.setName("starfish20.jpg");
jpg_mime.setEncoding("base64");
jpg_mime.setDisposition("inline");
jpg_mime.setFilename("starfish20.jpg");
const sb_content_id_hdr = try chilkat.StringBuilder.init();
defer sb_content_id_hdr.deinit();
sb_content_id_hdr.append("<CONTENT_ID>") catch {};
num_replacements = sb_content_id_hdr.replace("CONTENT_ID", try sb_content_id.getAsString(alloc));
jpg_mime.setHeaderField("Content-ID", try sb_content_id_hdr.getAsString(alloc)) catch {};
// Add both parts as children of the multipart/related
mime.appendPart(html_mime) catch {};
mime.appendPart(jpg_mime) catch {};
std.debug.print("{s}\n", .{try mime.getMime(alloc)});
// --------------------------------------------------------------
// --------------------------------------------------------------
// 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--
//
}