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(Java) Add, Remove, Update MIME Header FieldsDemonstrates how to add, remove, or update the content of MIME header fields.
import com.chilkatsoft.*; public class ChilkatExample { static { try { System.loadLibrary("chilkat"); } catch (UnsatisfiedLinkError e) { System.err.println("Native code library failed to load.\n" + e); System.exit(1); } } public static void main(String argv[]) { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. CkMime mime = new CkMime(); // The contents of this MIME file are shown below, // and is also available at https://www.chilkatsoft.com/sampleMime.txt boolean success = mime.LoadMimeFile("qa_data/mime/sampleMime.txt"); if (success != true) { System.out.println(mime.lastErrorText()); return; } // The MIME used in this example has the following nested structure // // multipart/alternative // text/plain // multipart/related // text/html // image/jpeg // // Adding a top-level MIME header is easy. mime.AddHeaderField("hello-world","Hello World!"); // If a header field of the same name already exists, the AddHeaderField // method adds a duplicate. mime.AddHeaderField("Subject","This is the 2nd Subject header."); System.out.println(mime.getEntireHead()); System.out.println("-"); // The top-level header now looks like this: // // Subject: Test email. // Content-Type: multipart/alternative; boundary="------------DB171738719FB06D67DEBAA0" // MIME-Version: 1.0 // hello-world: Hello World! // Subject: This is the 2nd Subject header. // // The RemoveHeaderField method can remove the 1st occurrance, or all occurrences. boolean bAllOccurrences = true; // Remove all occurrences of the Subject header; mime.RemoveHeaderField("Subject",bAllOccurrences); System.out.println(mime.getEntireHead()); System.out.println("-"); // After removing all Subject header fields, the top-level header now looks like this: // // Content-Type: multipart/alternative; boundary="------------DB171738719FB06D67DEBAA0" // MIME-Version: 1.0 // hello-world: Hello World! // // The content of a header field can be updated by calling SetHeaderField. // If the header field does not already exist, it is added. Otherwise it is updated. // Note: The order of header fields SHOULD never matter. mime.SetHeaderField("hello-world","Goodbye World."); System.out.println(mime.getEntireHead()); System.out.println("-"); // Now we have: // // Content-Type: multipart/alternative; boundary="------------DB171738719FB06D67DEBAA0" // MIME-Version: 1.0 // hello-world: Goodbye World. // // To add/update/delete header fields in sub-parts, navigate to // the sub-part and do the same.. CkMime mpRelated = mime.GetPart(1); CkMime pJpg = mpRelated.GetPart(1); // Add a header to the image/jpeg sub-header. pJpg.SetHeaderField("CustomHeader","This is the custom header value."); // View the entire MIME.. System.out.println(mime.getMime()); // -------------------------------------------------------------- // -------------------------------------------------------------- // 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. <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-- // } } |
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