Swift
Add Image to HTML Email

Demonstrates how to add an image to an HTML email.
Chilkat Swift Downloads

Swift

func chilkatTest() {
    var success: Bool = false

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

    let email = CkoEmail()!

    email.from = "Matt <matt@example.com>"
    email.add(to: "Joe", emailAddress: "joe@example.com")
    email.subject = "This is a test"

    // Add an HTML body with an image tag.
    var html: String? = "<html><body><p>Test with image:</p><p><img src=\"/wildlife/starfish.jpg\" /></p></body></html>"
    email.setHtmlBody(html: html)

    // Add the image data from a file.  The pathInHtml must match the value of the img tag's src attribute.
    var pathInHtml: String? = "/wildlife/starfish.jpg"
    // The actual path of the JPG file in the local filesystem:
    var pathOnDisk: String? = "qa_data/jpg/starfish20.jpg"

    success = email.addRelatedFile2(fileNameOnDisk: pathOnDisk, filenameInHtml: pathInHtml)
    if success == false {
        print("\(email.lastErrorText!)")
        return
    }

    // The email is now properly constructed with an image that will be visible in the HTML.
    // In this example, we'll save it to a .eml file and verify by loading the .eml in an email client such as Mozilla Thunderbird.

    success = email.saveEml(path: "qa_output/starfish.eml")

    // Also, we can examine the MIME to understand how the image data in the MIME is associated with the img tag in the HTML.
    // It is the Content-Location header value that must match the value of the img tag's src attribute.

    print("\(email.getMime()!)")

    // Here's the MIME:

    // MIME-Version: 1.0
    // Date: Thu, 26 May 2022 11:09:12 -0500
    // Message-ID: <B1D499F74F533E287BFE04BBD79AAF1D973B61E3@SLICE>
    // Content-Type: multipart/related; boundary="------------000205040704010904010706"
    // X-Priority: 3 (Normal)
    // From: Matt <matt@example.com>
    // To: Joe <joe@example.com>
    // Subject: This is a test
    // 
    // --------------000205040704010904010706
    // Content-Type: text/html; charset=us-ascii
    // Content-Transfer-Encoding: 7bit
    // 
    // <html><body><p>Test with image:</p><p><img src="/wildlife/starfish.jpg" /></p></body></html>
    // --------------000205040704010904010706
    // Content-Type: image/jpeg; name="/wildlife/starfish.jpg"
    // Content-Transfer-Encoding: base64
    // Content-Disposition: inline; filename="/wildlife/starfish.jpg"
    // Content-Location: /wildlife/starfish.jpg
    // 
    // /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==
    // 
    // --------------000205040704010904010706--

}