(Swift 3,4,5...) Send GMail with Attachments

Demonstrates how to send an email containing attachments using the GMail REST API.

Chilkat Downloads for the Swift Programming Language

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

iOS Objective-C/Swift Libs

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

    var success: Bool

    // Use the Chilkat Email API to create or load an email.
    let email = CkoEmail()!

    // The From name/address don't need to be specified. 
    // GMail will automatically use your Gmail address if the following 2 lines are omitted.
    email.fromName = "My Name"
    email.fromAddress = "my_account_name@gmail.com"

    email.add(to: "John Smith", emailAddress: "somebody@somewhere.com")
    // To add more recipients, make additional calls to AddTo or AddCC, one per recipient...

    email.subject = "This is a test GMail email created using Chilkat."
    email.charset = "utf-8"
    email.addPlainTextAlternativeBody("This is a test")

    // Create an HTML email body with an embedded image.
    var cid: String? = email.addRelatedFile("qa_data/jpg/starfish.jpg")
    let sbHtml = CkoStringBuilder()!
    sbHtml.append("<html><body>This is a <b>test</b><br><img src=\"cid:STARFISH_CID\"/></body></html>")
    var numReplacements: Int = sbHtml.replace("STARFISH_CID", replacement: cid).intValue

    email.addHtmlAlternativeBody(sbHtml.getAsString())

    // Add some attachments..
    var mimeType: String? = email.addFileAttachment("qa_data/helloWorld.pdf")
    if email.lastMethodSuccess != true {
        print("Failed to add PDF attachment.")
        return
    }

    mimeType = email.addFileAttachment("qa_data/msword/sample2.docx")
    if email.lastMethodSuccess != true {
        print("Failed to add MS-Word attachment.")
        return
    }

    // OK.. we now have an HTML email with 2 attachments..
    let sbMime = CkoStringBuilder()!
    email.getMimeSb(sbMime)

    // Send the email.  (GMail has a 5MB limit on the total email size.)
    let http = CkoHttp()!
    http.authToken = "GMAIL-ACCESS-TOKEN"

    // Send using the simple upload request for the Gmail API
    var url: String? = "https://www.googleapis.com/upload/gmail/v1/users/me/messages/send?uploadType=media"
    var sendGzipped: Bool = true
    var resp: CkoHttpResponse? = http.pTextSb("POST", url: url, textData: sbMime, charset: "utf-8", contentType: "message/rfc822", md5: false, gzip: sendGzipped)
    if http.lastMethodSuccess != true {
        print("\(http.lastErrorText!)")
        return
    }

    // A status code of 200 indicates success.
    print("Response status code: \(resp!.statusCode.intValue)")
    print("Response body:")
    print("\(resp!.bodyStr!)")
    resp = nil

    // The response body contains JSON.
    // Use the online tool at Generate JSON Parsing Code
    // to generate JSON parsing code.

    // A sample successful JSON response:

    // {
    //  "id": "166f0d4ac39e50bf",
    //  "threadId": "166f0d4ac39e50bf",
    //  "labelIds": [
    //   "SENT"
    //  ]
    // }

}