Java

Get a Header Attribute of an Attachment

Demonstrates the Chilkat Email.GetAttachmentAttr method, which returns a header-field attribute value from a header field of the Nth attachment. The first argument is the zero-based attachment index, the second names a header field, and the third names an attribute within it. This example reads the filename attribute of the attachment's Content-Disposition header.

Background: A MIME header can have named parameters after its main value, such as Content-Type: text/plain; charset="utf-8"; name="notes.txt". Here charset and name are attributes. GetAttachmentAttr pulls out one named attribute from a chosen header of a specific attachment, sparing you from parsing the raw header string and dealing with quoting or ordering.

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Java

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[])
  {
    //  Demonstrates the GetAttachmentAttr method, which returns a header-field attribute value
    //  from a header field of the Nth attachment.  The first argument is the zero-based attachment
    //  index, the second is the header field name, and the third is the attribute name.

    CkEmail email = new CkEmail();
    email.put_Subject("Attachment header attribute");

    email.AddStringAttachment("notes.txt","Some notes.");

    //  Get the "filename" attribute of the attachment's Content-Disposition header (index 0).
    String fname = email.getAttachmentAttr(0,"Content-Disposition","filename");
    System.out.println("Attachment filename attribute: " + fname);
  }
}