(Tcl) Fetch 1st N Headers of Search Results

Calls Search to get a message set, then downloads the 1st N messages in the message set. There are two equivalent ways of doing it: (1) iterate from 0 to N-1 and download each message individually, or (2) create a new message set that contains the 1st N messages and pass it to FetchHeaders. Both are demonstrated here.

Note: This example requires Chilkat v11.0.0 or greater.

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load ./chilkat.dll

set success 0

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

set imap [new_CkImap]

# Connect to an IMAP server.
# Use TLS
CkImap_put_Ssl $imap 1
CkImap_put_Port $imap 993
set success [CkImap_Connect $imap "imap.example.com"]
if {$success == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Login
set success [CkImap_Login $imap "****" "****"]
if {$success == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Select an IMAP mailbox
set success [CkImap_SelectMailbox $imap "Inbox"]
if {$success == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    exit
}

# Get the message IDs of all the emails in the mailbox
# We can choose to fetch UIDs or sequence numbers.
set fetchUids 1
set messageSet [new_CkMessageSet]

set success [CkImap_QueryMbx $imap "ALL" $fetchUids $messageSet]
if {$success == 0} then {
    puts [CkImap_lastErrorText $imap]
    delete_CkImap $imap
    delete_CkMessageSet $messageSet
    exit
}

set numFound [CkMessageSet_get_Count $messageSet]
if {$numFound == 0} then {
    puts "No messages found."
    delete_CkImap $imap
    delete_CkMessageSet $messageSet
    exit
}

# Get the 1st 10 messages in messageSet.
set upperBound 10
if {$numFound < $upperBound} then {
    set upperBound $numFound
}

set i 0
set bUid [CkMessageSet_get_HasUids $messageSet]
set headerOnly 1
set email [new_CkEmail]

while {$i < $upperBound} {

    set success [CkImap_FetchEmail $imap $headerOnly [CkMessageSet_GetId $messageSet $i] $bUid $email]
    if {$success == 0} then {
        puts [CkImap_lastErrorText $imap]
        delete_CkImap $imap
        delete_CkMessageSet $messageSet
        delete_CkEmail $email
        exit
    }

    puts "$i: [CkEmail_subject $email]"

    set i [expr $i + 1]
}

# Disconnect from the IMAP server.
set success [CkImap_Disconnect $imap]

delete_CkImap $imap
delete_CkMessageSet $messageSet
delete_CkEmail $email