Zig

Convert HTML Web Page to Email and Send

See more MHT / HTML Email Examples

Converts an HTML page at a URL into an email with embedded images and sends it. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

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

    const mailman = try chilkat.MailMan.init();
    defer mailman.deinit();

    // The MHT component can be used to convert an HTML page
    // from a URL, file, or in-memory HTML into an email
    // with embedded images and style sheets.
    const mht = try chilkat.Mht.init();
    defer mht.deinit();

    const email = try chilkat.Email.init();
    defer email.deinit();

    // There are two ways of embedding images in emails: with CIDs
    // and without.  When using CIDs, the IMG SRC attributes use
    // urls that begin with "cid:" and the corresponding image
    // embedded within the email includes a Content-ID header field.
    // When not using CIDs, the IMG SRC attribute can have a URL,
    // path, etc. and the corresponding image embedded within
    // the email has a matching Content-Location header field.

    // When testing with GMail, if CIDs are used the email will
    // be displayed with images blocked (by default) unless
    // the user allows them to be displayed.  Without CIDs,
    // the images are automatically displayed.

    // When testing with Eudora, Mozilla Thunderbird, and Outlook Express,
    // embedded images display correctly with our without CIDs.

    // When testing with Yahoo! Mail, embedded images display OK.
    // However, the Yahoo! Mail user has the option of blocking
    // images.  If this is turned on, the CID images will still
    // display correctly even though images are blocked.  Why?
    // It's because when viewing the email there is no external
    // HTTP request to fetch an image.  Therefore, a spammer
    // cannot get an indication that you've read the email.
    // However, if CIDs are not used, the images are blocked by
    // any Yahoo! Mail user that has image blocking turned on --
    // even though the images are embedded.

    // I haven't tested Hotmail yet...
    // Regardless, there is no perfect solution.  If CIDs are used,
    // GMail users may block your embedded images, if CIDs are not
    // used, Yahoo! Mail users may block your embedded images.

    // I recommend setting using CIDs.  This is what Mozilla Thunderbird
    // does by default, and it's the more clear an unambiguous way
    // to indicate that images are indeed embedded.
    mht.setUseCids(true);

    const eml_str = mht.getEML(alloc, "http://www.bonairefishing.com/") catch {
        std.debug.print("{s}\n", .{try mht.getLastErrorText(alloc)});
        return;
    };

    email.setFromMimeText(eml_str) catch {
        std.debug.print("{s}\n", .{try email.getLastErrorText(alloc)});
        return;
    };

    email.setSubject("Test HTML email");

    // This example is tested in:
    // Outlook 2000, Eudora 7, Mozilla Thunderbird 1.5.0.9, Outlook Express 6, GMail, Yahoo Mail
    try email.addTo("Chilkat Support", "support@chilkatsoft.com");

    // Note: Chilkat does not regularly check our GMail and Yahoo
    // email accounts.  Please send support email to support@chilkatsoft.com
    try email.addTo("Chilkat on Yahoo", "chilkat_software@yahoo.com");
    try email.addTo("Chilkat on GMail", "chilkat.support@gmail.com");

    email.setFrom("chilkat@live.com");

    // Send email using smtp.live.com
    mailman.setSmtpHost("smtp.live.com");
    mailman.setSmtpUsername("chilkat@live.com");
    mailman.setSmtpPassword("myPassword");
    mailman.setSmtpPort(587);
    mailman.setStartTLS(true);

    mailman.sendEmail(email) catch {
        std.debug.print("{s}\n", .{try mailman.getLastErrorText(alloc)});
        return;
    };

    mailman.closeSmtpConnection() catch {
        std.debug.print("{s}\n", .{try mailman.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("HTML Email Sent!\n", .{});
}