(Lianja) How to Download Messages in MessageSet One at a Time

If a message set contains a huge number of emails, it's NOT a good idea to try to download all at once into an email bundle using a method such as FetchBundle. It's better to iterate over the messages in the set to download one by one.

Chilkat Lianja Extension Download Chilkat Lianja Extension

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loImap = createobject("CkImap")

// Connect using TLS.
loImap.Ssl = .T.
loImap.Port = 993
llSuccess = loImap.Connect("imap.example.com")
if (llSuccess <> .T.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

// Authenticate
llSuccess = loImap.Login("email_account_login","email_account_password")
if (llSuccess <> .T.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

// Select an IMAP mailbox
llSuccess = loImap.SelectMailbox("Inbox")
if (llSuccess <> .T.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

// Search for messages and return a set of matching messages.
// (This example will simply search for ALL messages.)
llFetchUids = .T.
loMessageSet = loImap.Search("ALL",llFetchUids)
if (loImap.LastMethodSuccess <> .T.) then
    ? loImap.LastErrorText
    release loImap
    return
endif

? "Number of messages = " + str(loMessageSet.Count)

i = 0
do while i < loMessageSet.Count
    loEmail = loImap.FetchSingle(loMessageSet.GetId(i),llFetchUids)
    if (loImap.LastMethodSuccess <> .T.) then
        ? loImap.LastErrorText
        release loMessageSet
        release loImap
        return
    endif

    ? loEmail.From + "; " + loEmail.Subject
    release loEmail

    i = i + 1
enddo

release loMessageSet

? "OK"


release loImap