Java

Get the Content-Type of an Attachment

Demonstrates the Chilkat Email.GetAttachmentContentType method, which returns the Content-Type header field for the Nth attachment. Attachment indexing begins at 0. This example adds an attachment and reads its content type.

Background: The Content-Type (MIME type) of an attachment — such as text/plain, application/pdf, or image/png — tells a mail client how to handle the part: whether to display it inline, offer it as a download, or pick an icon for it. Reading it lets your program filter or route attachments by type, for example extracting only the PDFs from a batch of messages.

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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 GetAttachmentContentType method, which returns the Content-Type header
    //  field for the Nth attachment.  The index is zero-based.

    CkEmail email = new CkEmail();
    email.put_Subject("Attachment content type");

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

    //  Get the Content-Type of the first attachment (index 0).
    String ct = email.getAttachmentContentType(0);
    System.out.println("Attachment 0 Content-Type: " + ct);
  }
}