(Swift 2) Convert MIME to XML

Demonstrates how to convert MIME to XML, and how to access the MIME parts and data from XML.

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.

    let mime = CkoMime()

    // The contents of this MIME file are shown below, 
    // and is also available at https://www.chilkatsoft.com/sampleMime.txt
    var success: Bool = mime.LoadMimeFile("qa_data/mime/sampleMime.txt")
    if success != true {
        print("\(mime.LastErrorText)")
        return
    }

    // The MIME used in this example has the following nested structure
    // 
    // multipart/alternative
    //     text/plain
    //     multipart/related
    //         text/html
    //         image/jpeg
    // 

    // Convert to XML.
    var xmlStr: String? = mime.GetXml()

    // Load into a Chilkat XML object so we can emit in indented format.
    // (and also to demonstrate how to access the MIME content from XML).
    let xml = CkoXml()
    xml.LoadXml(xmlStr)
    // The XML emitted by this statement is shown below, following the remainder of sample code.
    print("\(xml.GetXml())")

    // To get the top-level Subject header field:
    print("Subject = \(xml.ChilkatPath("header|subject|*"))")

    // Another way of getting the Subject:
    xml.FirstChild2()
    print("Subject = \(xml.GetChildContent("subject"))")
    xml.GetRoot2()

    // Using the Chilkat XML API, there are many different ways of accomplishing a goal.
    // This example shows only a few possibilities...

    // Let's go to the <body> tag containing the HTML.
    // First we find the XML node where the content-type is text/html.
    // (XML methods ending in "2" update the internal reference to the XML node.)
    success = xml.SearchForContent2(xml, tag: "content-type", contentPattern: "text/html")
    if success == true {
        // From this point, we know the HTML content is two levels up (to the <mime_message> node),
        // and one level down (to the <body> node).  We can get the HTML content from here:
        var htmlContent: String? = xml.ChilkatPath("..|..|body|*")
        print("\(htmlContent!)")
        print("-")
    }

    // Back to the root...
    xml.GetRoot2()

    // How to iterate over all image/jpeg bodies and access the bytes of each?
    success = xml.SearchForContent2(xml, tag: "content-type", contentPattern: "image/jpeg")
    while success == true {
        // "$" in the Chilkat path indicates to update the internal reference of the caller
        // if the path could be traversed.
        var notUsed: String? = xml.ChilkatPath("..|..|body|$")
        if xml.LastMethodSuccess == true {
            var jpgBytes: NSData
            jpgBytes = xml.GetBinaryContent(false, decryptFlag: false, password: "")

            print("Found JPG image!")

            // Find the next JPG image.
            success = xml.SearchForContent2(xml, tag: "content-type", contentPattern: "image/jpeg")
        }
        else {
            success = false
        }

    }

    // --------------------------------------------------------------
    // --------------------------------------------------------------
    // The MIME converted to XML:

    // <?xml version="1.0" encoding="utf-8" ?>
    // <mime_message>
    //     <header>
    //         <subject>Test email.</subject>
    //         <content-type boundary="------------DB171738719FB06D67DEBAA0">multipart/alternative</content-type>
    //         <mime-version>1.0</mime-version>
    //     </header>
    //     <body>
    //         <subpart>
    //             <mime_message>
    //                 <header>
    //                     <content-type charset="utf-8" format="flowed">text/plain</content-type>
    //                     <content-transfer-encoding>7bit</content-transfer-encoding>
    //                 </header>
    //                 <body><![CDATA[This is a test.
    // ]]></body>
    //             </mime_message>
    //         </subpart>
    //         <subpart>
    //             <mime_message>
    //                 <header>
    //                     <content-type boundary="------------A940F1230E6F0105F03DB2CB">multipart/related</content-type>
    //                 </header>
    //                 <body>
    //                     <subpart>
    //                         <mime_message>
    //                             <header>
    //                                 <content-type charset="utf-8">text/html</content-type>
    //                                 <content-transfer-encoding>8bit</content-transfer-encoding>
    //                             </header>
    //                             <body><![CDATA[<html><head>
    // <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    //   </head>
    //   <body bgcolor="#FFFFFF" text="#000000">
    //     <p>This is a test.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
    //   </body>
    // </html>
    // ]]></body>
    //                         </mime_message>
    //                     </subpart>
    //                     <subpart>
    //                         <mime_message>
    //                             <header>
    //                                 <content-type name="starfish20.jpg">image/jpeg</content-type>
    //                                 <content-transfer-encoding>base64</content-transfer-encoding>
    //                                 <content-id>&lt;part1.E16AE3B4.1505C436@chilkatsoft.com&gt;</content-id>
    //                                 <content-disposition filename="starfish20.jpg">inline</content-disposition>
    //                             </header>
    //                             <body>/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==</body>
    //                         </mime_message>
    //                     </subpart>
    //                 </body>
    //             </mime_message>
    //         </subpart>
    //     </body>
    // </mime_message>
    // 

    // --------------------------------------------------------------
    // --------------------------------------------------------------
    // The MIME sample file loaded at the beginning of this example
    // contains the following MIME:

    // Subject: Test email.
    // Content-Type: multipart/alternative;
    // 	boundary="------------DB171738719FB06D67DEBAA0"
    // MIME-Version: 1.0
    // 
    // --------------DB171738719FB06D67DEBAA0
    // Content-Type: text/plain; charset="utf-8"; format=flowed
    // Content-Transfer-Encoding: 7bit
    // 
    // This is a test.
    // 
    // --------------DB171738719FB06D67DEBAA0
    // Content-Type: multipart/related;
    // 	boundary="------------A940F1230E6F0105F03DB2CB"
    // 
    // --------------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.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
    //   </body>
    // </html>
    // 
    // --------------A940F1230E6F0105F03DB2CB
    // Content-Type: image/jpeg; name="starfish20.jpg"
    // Content-Transfer-Encoding: base64
    // Content-ID: <part1.E16AE3B4.1505C436@chilkatsoft.com>
    // Content-Disposition: inline; filename="starfish20.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==
    // 
    // --------------A940F1230E6F0105F03DB2CB--
    // 
    // --------------DB171738719FB06D67DEBAA0--
    // 

}