Tcl
Get the Value of a MIME Header Field

Demonstrates how to get the value of a MIME header field. If the header field is not in the top-level MIME header, we must first navigate to the correct MIME part.
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Tcl

load ./chilkat.dll

set success 0

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

set mime [new_CkMime]

# The contents of this MIME file are shown below, 
# and is also available at https://www.chilkatsoft.com/sampleMime.txt
set success [CkMime_LoadMimeFile $mime "qa_data/mime/sampleMime.txt"]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    exit
}

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

# Getting the content of a top-level MIME header is easy.
# MIME header fields are case insensitive.
puts "Subject = [CkMime_getHeaderField $mime subject]"
puts "MIME-Version = [CkMime_getHeaderField $mime mime-version]"

# To get a MIME header in a sub-part, first navigate to it..

set mpRelated [new_CkMime]

set success [CkMime_PartAt $mime 1 $mpRelated]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mime]
    delete_CkMime $mime
    delete_CkMime $mpRelated
    exit
}

set pJpg [new_CkMime]

set success [CkMime_PartAt $mpRelated 1 $pJpg]
if {$success == 0} then {
    puts [CkMime_lastErrorText $mpRelated]
    delete_CkMime $mime
    delete_CkMime $mpRelated
    delete_CkMime $pJpg
    exit
}

puts "JPG Content-ID = [CkMime_getHeaderField $pJpg content-id]"
puts "JPG Content-Type = [CkMime_getHeaderField $pJpg content-type]"

# --------------------------------------------------------------
# --------------------------------------------------------------
# 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--
# 

delete_CkMime $mime
delete_CkMime $mpRelated
delete_CkMime $pJpg