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Add, Remove, Update MIME Header Fields

Demonstrates how to add, remove, or update the content of MIME header fields.
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Local $bSuccess = False

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

$oMime = ObjCreate("Chilkat.Mime")

; The contents of this MIME file are shown below, 
; and is also available at https://www.chilkatsoft.com/sampleMime.txt
$bSuccess = $oMime.LoadMimeFile("qa_data/mime/sampleMime.txt")
If ($bSuccess = False) Then
    ConsoleWrite($oMime.LastErrorText & @CRLF)
    Exit
EndIf

; The MIME used in this example has the following nested structure
; 
; multipart/alternative
;     text/plain
;     multipart/related
;         text/html
;         image/jpeg
; 

; Adding a top-level MIME header is easy.
$oMime.AddHeaderField("hello-world","Hello World!")
; If a header field of the same name already exists, the AddHeaderField
; method adds a duplicate.
$oMime.AddHeaderField("Subject","This is the 2nd Subject header.")
ConsoleWrite($oMime.GetEntireHead() & @CRLF)
ConsoleWrite("-" & @CRLF)

; The top-level header now looks like this:
; 
; 	Subject: Test email.
; 	Content-Type: multipart/alternative; boundary="------------DB171738719FB06D67DEBAA0"
; 	MIME-Version: 1.0
; 	hello-world: Hello World!
; 	Subject: This is the 2nd Subject header.
; 

; The RemoveHeaderField method can remove the 1st occurrance, or all occurrences.
Local $bAllOccurrences = True
; Remove all occurrences of the Subject header;
$oMime.RemoveHeaderField "Subject",$bAllOccurrences
ConsoleWrite($oMime.GetEntireHead() & @CRLF)
ConsoleWrite("-" & @CRLF)

; After removing all Subject header fields, the top-level header now looks like this:
; 
; Content-Type: multipart/alternative; boundary="------------DB171738719FB06D67DEBAA0"
; MIME-Version: 1.0
; hello-world: Hello World!
; 

; The content of a header field can be updated by calling SetHeaderField.
; If the header field does not already exist, it is added.  Otherwise it is updated.
; Note: The order of header fields SHOULD never matter.
$oMime.SetHeaderField("hello-world","Goodbye World.")
ConsoleWrite($oMime.GetEntireHead() & @CRLF)
ConsoleWrite("-" & @CRLF)

; Now we have:
; 
; 	Content-Type: multipart/alternative; boundary="------------DB171738719FB06D67DEBAA0"
; 	MIME-Version: 1.0
; 	hello-world: Goodbye World.
; 

; To add/update/delete header fields in sub-parts, navigate to
; the sub-part and do the same..

$oMpRelated = ObjCreate("Chilkat.Mime")
$oMime.PartAt(1,$oMpRelated)

$oPJpg = ObjCreate("Chilkat.Mime")
$oMpRelated.PartAt(1,$oPJpg)

; Add a header to the image/jpeg sub-header.
$oPJpg.SetHeaderField("CustomHeader","This is the custom header value.")

; View the entire MIME..
ConsoleWrite($oMime.GetMime() & @CRLF)

; --------------------------------------------------------------
; --------------------------------------------------------------
; The MIME sample file loaded at the beginning of this example
; contains the following MIME:

; Subject: Test email.
; Content-Type: multipart/alternative;
; 	boundary="------------DB171738719FB06D67DEBAA0"
; MIME-Version: 1.0
; 
; --------------DB171738719FB06D67DEBAA0
; Content-Type: text/plain; charset="utf-8"; format=flowed
; Content-Transfer-Encoding: 7bit
; 
; This is a test.
; 
; --------------DB171738719FB06D67DEBAA0
; Content-Type: multipart/related;
; 	boundary="------------A940F1230E6F0105F03DB2CB"
; 
; --------------A940F1230E6F0105F03DB2CB
; Content-Type: text/html; charset="utf-8"
; Content-Transfer-Encoding: 8bit
; 
; <html><head>
; <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
;   </head>
;   <body bgcolor="#FFFFFF" text="#000000">
;     <p>This is a test.&nbsp; <img src="cid:part1.E16AE3B4.1505C436@chilkatsoft.com" height="20" width="20"></p>
;   </body>
; </html>
; 
; --------------A940F1230E6F0105F03DB2CB
; Content-Type: image/jpeg; name="starfish20.jpg"
; Content-Transfer-Encoding: base64
; Content-ID: <part1.E16AE3B4.1505C436@chilkatsoft.com>
; Content-Disposition: inline; filename="starfish20.jpg"
; 
; /9j/4AAQSkZJRgABAQEASABIAAD//gAmRmlsZSB3cml0dGVuIGJ5IEFkb2JlIFBob3Rvc2hvcD8g
; NC4w/9sAQwAQCwwODAoQDg0OEhEQExgoGhgWFhgxIyUdKDozPTw5Mzg3QEhcTkBEV0U3OFBtUVdf
; YmdoZz5NcXlwZHhcZWdj/9sAQwEREhIYFRgvGhovY0I4QmNjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj
; Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2Nj/8IAEQgAFAAUAwERAAIRAQMRAf/EABcAAAMBAAAA
; AAAAAAAAAAAAAAIDBAX/xAAYAQADAQEAAAAAAAAAAAAAAAABAgMEAP/aAAwDAQACEAMQAAAB2kZY
; NNEijWKddfTmLgALWH//xAAbEAACAgMBAAAAAAAAAAAAAAABAgMRAAQSE//aAAgBAQABBQL0XqN+
; pM2aqJGMiqFFCyg7z//EABwRAAICAgMAAAAAAAAAAAAAAAERAAIQIQMSUf/aAAgBAwEBPwHqU5aq
; Axx+y1tMQl4elj//xAAcEQEAAQUBAQAAAAAAAAAAAAABEQACEBIhA1H/2gAIAQIBAT8B3Bhqy7Zc
; enyiwmGgDhiOzj//xAAdEAABAwUBAAAAAAAAAAAAAAABAAIREBIhIkFR/9oACAEBAAY/ArZyn+Cg
; xtxWuJaoCnqDuin/xAAcEAABBAMBAAAAAAAAAAAAAAABABEhYRAxQVH/2gAIAQEAAT8hkEwPUUR9
; DYfE4nxtRpIkBTsayuALIiuY/9oADAMBAAIAAwAAABDWPTsf/8QAGhEAAwADAQAAAAAAAAAAAAAA
; AAEREDFBIf/aAAgBAwEBPxC0DVPcWm+Ce4OesrkE6bjH/8QAGBEBAQEBAQAAAAAAAAAAAAAAAREA
; QRD/2gAIAQIBAT8QahMiOc8YgSrnTY3ELclHXn//xAAcEAEBAAIDAQEAAAAAAAAAAAABEQAhMUFx
; EFH/2gAIAQEAAT8Qn3igmSZSj+c4N4zapMy9IjFV98wncN2iuLFsCEbDGxQkI6RO/n//2Q==
; 
; --------------A940F1230E6F0105F03DB2CB--
; 
; --------------DB171738719FB06D67DEBAA0--
;