Java

Get a Header Field by Name

Demonstrates the Chilkat Email.GetHeaderField method, which returns the value of a header field by name. Header-field names are case-insensitive, so X-Priority and x-priority refer to the same field. This example reads several headers by name.

Background: Looking up a header by name is the quickest way to read a known field like Subject or a custom X- header. One caveat: some header names (such as Received) can legitimately appear more than once. When a field may repeat and you need every occurrence, enumerate by index with GetHeaderFieldName and GetHeaderFieldValue instead of looking up by name.

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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 GetHeaderField method, which returns the value of a header field by
    //  name.  Header-field names are case-insensitive.

    CkEmail email = new CkEmail();
    email.put_Subject("Quarterly report");
    email.put_From("alice@example.com");
    email.AddHeaderField("X-Priority","1");

    //  Get header field values by name.
    System.out.println("Subject = " + email.getHeaderField("Subject"));
    System.out.println("From = " + email.getHeaderField("From"));
    System.out.println("X-Priority = " + email.getHeaderField("x-priority"));
  }
}