(Swift) SendGrid HTML Email with Embedded Images

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Demonstrates how to send an HTML email with embedded images using SendGrid.

Note: This example requires Chilkat v11.0.0 or greater.

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MAC OS X (Cocoa) Objective-C/Swift Libs

iOS Objective-C/Swift Libs

func chilkatTest() {
    var success: Bool = false

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

    let req = CkoHttpRequest()!
    let http = CkoHttp()!

    // First.. load a JPG file and build an HTML img tag with the JPG data inline encoded.
    // Our HTML img tag will look like this:
    // <img src="data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEA3ADcAA..." alt="" style="border-width:0px;" />
    let bdJpg = CkoBinData()!
    success = bdJpg.loadFile("qa_data/jpg/starfish.jpg")
    if success == false {
        print("Failed to load JPG file.")
        return
    }

    // Note: HTML containing embedded base64 image data may not be visible in all email clients.
    // For example, GMail might not display the image, but viewing in Outlook might be OK.
    let sbHtml = CkoStringBuilder()!
    sbHtml.append("<html><body><b>This is a test<b><br /><img src=\"data:image/jpeg;base64,")
    // Append the base64 image data to sbHtml.
    bdJpg.getEncodedSb("base64", sb: sbHtml)
    sbHtml.append("\" alt=\"\" style=\"border-width:0px;\" /></body></html>")

    let json = CkoJsonObject()!
    json.update("personalizations[0].to[0].email", value: "matt@chilkat.io")
    json.update("personalizations[0].to[0].name", value: "Matt")
    json.update("from.email", value: "admin@chilkatsoft.com")
    json.update("subject", value: "Test HTML email with images")
    json.update("content[0].type", value: "text/html")
    json.updateSb("content[0].value", sb: sbHtml)

    http.authToken = "SENDGRID_API_KEY"

    let resp = CkoHttpResponse()!
    success = http.httpJson("POST", url: "https://api.sendgrid.com/v3/mail/send", json: json, contentType: "application/json", response: resp)
    if success == false {
        print("\(http.lastErrorText!)")
        return
    }

    print("response status code: \(resp.statusCode.intValue)")
    // Display the response.
    // If successful, the response code is 202 and the response body string is empty.
    // (The response body string may also be empty for error response codes.)
    print("\(resp.bodyStr!)")

}