PowerShell

Fetch a Single Message's MIME into a StringBuilder

Demonstrates the Chilkat Imap.FetchSingleAsMimeSb method, which downloads one message's MIME into a StringBuilder. The first argument is the message id, the second (bUid) selects UID vs sequence number, and the third is the StringBuilder, which is cleared first. This example downloads a message by UID and prints the MIME length.

Background: Chilkat interprets the received MIME as UTF-8. Messages using Base64 or quoted-printable transfer encoding are safe because their encoded bytes are ASCII. Raw 8bit or binary content, or unencoded text in a charset such as ISO-8859-1 or Shift_JIS, can be misinterpreted — in those cases use FetchSingleBd to get the exact bytes.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  Demonstrates the Imap.FetchSingleAsMimeSb method, which downloads one message's MIME into a
#  StringBuilder.  The 1st argument is the message id, the 2nd (bUid) selects UID vs sequence
#  number, and the 3rd is the StringBuilder (cleared first).

$imap = New-Object Chilkat.Imap

$imap.Ssl = $true
$imap.Port = 993

$success = $imap.Connect("imap.example.com")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

$success = $imap.Login("user@example.com","myPassword")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

$success = $imap.SelectMailbox("Inbox")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  Search for the message ids to download, returning UIDs.
$wantUids = $true
$msgSet = New-Object Chilkat.MessageSet
$success = $imap.QueryMbx("ALL",$wantUids,$msgSet)
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

if ($msgSet.Count -gt 0) {
    $uid = $msgSet.GetId(0)

    #  Download the message's MIME into a StringBuilder.  The id is a UID.
    $useUid = $true
    $sbMime = New-Object Chilkat.StringBuilder
    $success = $imap.FetchSingleAsMimeSb($uid,$useUid,$sbMime)
    if ($success -eq $false) {
        $($imap.LastErrorText)
        exit
    }

    $("MIME length: " + $sbMime.Length + " chars")
}

$success = $imap.Disconnect()
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}