Java

Parse MIME Header Fields

See more MIME Examples

Demonstrates how to parse MIME header fields, including Content-Type, Content-Disposition, and Content-Transfer-Encoding.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800";

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif";
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif";

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
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--------------080707010302060306060800--

Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Mime;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Mime mime = new Mime();

        // Load the sampleMime2.txt file into the MIME object.
        // (This file is available at http://www.chilkatsoft.com/testData/sampleMime2.txt )

        try {
            mime.loadMimeFile("sampleMime2.txt");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // The GIF image is the 2nd sub-part located directly under the
        // top-level MIME node.  Indexing begins at 0, therefore the 2nd
        // sub-part is at index 1.
        Mime part2 = new Mime();
        try {
            mime.partAt(1, part2);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // -------------------------------
        // Content-Disposition
        // -------------------------------
        // In this example, the Content-Disposition header field
        // contains this value:
        // attachment; filename="starfish.gif";

        // To get the "filename", call GetHeaderFieldAttribute
        // Header field names and attribute names are case insensitive.
        String filename = part2.getHeaderFieldAttribute("Content-Disposition", "filename");
        System.out.println("Filename: " + filename);

        // Because the "filename" is so often accessed, it is also available
        // by accessing the "Filename" property:
        System.out.println("Filename: " + part2.getFilename());

        // The disposition (without attributes) which in this case
        // is the string "attachment" is accessed via the Disposition property:
        System.out.println("Disposition: " + part2.getDisposition());

        // To get the full value of the Content-Disposition header field,
        // call GetHeaderField.
        System.out.println("Content-Disposition: " + part2.getHeaderField("Content-Disposition"));

        // -------------------------------
        // Content-Type
        // -------------------------------
        // In this example, the Content-Type header field
        // contains this value:
        // image/gif; name="starfish.gif";

        // To get the "name", call GetHeaderFieldAttribute
        String name = part2.getHeaderFieldAttribute("Content-Type", "name");
        System.out.println("Content-Type name: " + name);

        // Because the "name" is so often accessed, it is also available
        // by accessing the "Name" property:
        System.out.println("Content-Type name: " + part2.getName());

        // The content-type without attributes is available in the
        // ContentType property:
        System.out.println("Content-Type: " + part2.getContentType());

        // To get the full value of the Content-Type header field,
        // call GetHeaderField.
        System.out.println("Content-Type: " + part2.getHeaderField("Content-Type"));

        // -------------------------------
        // Content-Transfer-Encoding
        // -------------------------------

        // The Encoding property contains the value of the
        // Content-Transfer-Encoding property.
        // Calling GetHeaderField("Content-Transfer-Encoding") is
        // equivalent to accessing the Encoding property:
        System.out.println("Content-Transfer-Encoding: " + part2.getEncoding());
        System.out.println("Content-Transfer-Encoding: " + part2.getHeaderField("Content-Transfer-Encoding"));

        System.out.println("Finished.");
    }
}