Lianja

Download the Full Version of a Partial Email

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.

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llSuccess = .F.

//  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.

loMailman = createobject("CkMailMan")

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

//  First fetch message 1 as headers only (a fast preview).  headerOnly=.T..
loPartialEmail = createobject("CkEmail")

llSuccess = loMailman.FetchOne(.T.,0,1,loPartialEmail)
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    release loPartialEmail
    return
endif

? "Preview subject: " + loPartialEmail.Subject

//  Now download the complete message (body and attachments).
loFullEmail = createobject("CkEmail")
llSuccess = loMailman.FetchFull(loPartialEmail,loFullEmail)
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    release loPartialEmail
    release loFullEmail
    return
endif

? "Full email NumAttachments: " + str(loFullEmail.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.


release loMailman
release loPartialEmail
release loFullEmail