Java
Java
Download the Full Version of a Partial Email
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Demonstrates the Chilkat MailMan.FetchFull method, which downloads the complete version of a header-only or partial Email and stores it in a second Email. The full result includes the complete body and any attachments, and the partial email must retain its UIDL. This example previews message 1 (headers only) and then downloads it in full.
Background: A common pattern is to download headers first — cheap and fast — show the user a message list, and only pull the full content when a message is actually opened.
FetchFull completes that "download on demand" flow: given a partial email (which carries its UIDL), it fetches the rest from the server. This keeps bandwidth and latency low when browsing a large mailbox.Chilkat Java Downloads
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[])
{
boolean success = false;
// Demonstrates the MailMan.FetchFull method, which downloads the complete version of a
// header-only or partial Email and stores it in a second Email. The full result includes
// the complete body and any attachments. The partial email must retain its UIDL.
CkMailMan mailman = new CkMailMan();
// Configure the POP3 server connection.
mailman.put_MailHost("pop.example.com");
mailman.put_MailPort(995);
mailman.put_PopSsl(true);
mailman.put_PopUsername("user@example.com");
mailman.put_PopPassword("myPassword");
// First fetch message 1 as headers only (a fast preview). headerOnly=true.
CkEmail partialEmail = new CkEmail();
success = mailman.FetchOne(true,0,1,partialEmail);
if (success == false) {
System.out.println(mailman.lastErrorText());
return;
}
System.out.println("Preview subject: " + partialEmail.subject());
// Now download the complete message (body and attachments).
CkEmail fullEmail = new CkEmail();
success = mailman.FetchFull(partialEmail,fullEmail);
if (success == false) {
System.out.println(mailman.lastErrorText());
return;
}
System.out.println("Full email NumAttachments: " + fullEmail.get_NumAttachments());
// Note: Explicitly connecting/authenticating is optional. Chilkat MailMan automatically
// connects and authenticates -- using the property settings above -- whenever a server
// operation requires it. Calling the explicit connect/authenticate methods can still be
// helpful to determine whether a failure occurs while connecting or while authenticating.
}
}