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Node.js

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 Node.js Downloads

Node.js
NODEJS_PRELUDE

function chilkatExample() {

    var 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.

    var mailman = new chilkat.MailMan();

    //  Configure the POP3 server connection.
    mailman.MailHost = "pop.example.com";
    mailman.MailPort = 995;
    mailman.PopSsl = true;
    mailman.PopUsername = "user@example.com";
    mailman.PopPassword = "myPassword";

    //  First fetch message 1 as headers only (a fast preview).  headerOnly=true.
    var partialEmail = new chilkat.Email();

    success = mailman.FetchOne(true,0,1,partialEmail);
    if (success == false) {
        console.log(mailman.LastErrorText);
        return;
    }

    console.log("Preview subject: " + partialEmail.Subject);

    //  Now download the complete message (body and attachments).
    var fullEmail = new chilkat.Email();
    success = mailman.FetchFull(partialEmail,fullEmail);
    if (success == false) {
        console.log(mailman.LastErrorText);
        return;
    }

    console.log("Full email NumAttachments: " + fullEmail.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.

}

chilkatExample();