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Convert Inline Data-URL Images to Related Parts

Demonstrates the Chilkat Email.ConvertInlineImages method, which converts images embedded inline within HTML (as base64 data URLs) into multipart/related MIME parts referenced from the HTML by cid:. This example sets an HTML body containing a data-URL image and converts it.

Background: HTML can embed an image two ways: as a data: URL (the base64 bytes sit right in the src attribute) or as a related part referenced by cid:. Many email clients don't render data: URLs for security reasons, so converting them to proper multipart/related parts — the traditional email way to embed images — greatly improves how reliably the images display.

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Local $bSuccess = False

;  Demonstrates the ConvertInlineImages method, which converts images embedded inline within
;  HTML (as base64 data URLs) into multipart/related MIME parts referenced from the HTML by
;  CID.

$oEmail = ObjCreate("Chilkat.Email")
$oEmail.Subject = "Convert inline images"

;  An HTML body with a base64 data-URL image (a 1x1 PNG).
$oEmail.SetHtmlBody "<html><body><img src=""data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8z8BQDwAEhQGAhKmMIQAAAABJRU5ErkJggg==""/></body></html>"

ConsoleWrite("NumRelatedItems before = " & $oEmail.NumRelatedItems & @CRLF)

;  Convert the inline data-URL image(s) to multipart/related parts referenced by CID.

$bSuccess = $oEmail.ConvertInlineImages()
If ($bSuccess = False) Then
    ConsoleWrite($oEmail.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("NumRelatedItems after = " & $oEmail.NumRelatedItems & @CRLF)