VB.NET

Convert Embedded HTML Images to Multipart/Related CID References

Demonstrates how to convert HTML images that are inline/embedded within the HTML to CID references to multipart/related MIME parts.

Note: This example requires Chilkat v9.5.0.78 or greater.

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Dim success As Boolean = False

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

' This example converts the following email with image data embedded directly in the HTML,
' to the MIME shown at the bottom of this page.
' If the HTML contains multiple embedded images, the call to email.ConvertInlineImages will convert all of them.

' MIME-Version: 1.0
' Date: Tue, 30 Apr 2019 11:36:34 +0200
' Message-ID: <E5DB5F8A65D671FB4822B22F5309411838F2FC93@PC0VDL0W013>
' Content-Type: text/html; charset="windows-1252"
' Content-Transfer-Encoding: quoted-printable
' X-Priority: 3 (Normal)
' From: <admin@chilkatsoft.com>
' To: Matt <matt@chilkat.io>
' Subject: Test
' 
' <html xmlns=3D"http://www.w3.org/1999/xhtml">
' <body><p>
' <img src=3D"data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEA3ADcAAD/2=
' wBDAAIBAQEBAQIBAQECAgICAgQDAgICAgUEBAMEBgUGBgYFBgYGBwkIBgcJBwYGCAsICQoKCgoK=
' BggLDAsKDAkKCgr/2wBDAQICAgICAgUDAwUKBwYHCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgo=
' ...
' 4zzS3ww+5/8AyR//2Q=3D=3D" width=3D"58" height=3D"66" alt=3D"" style=3D"bord=
' er-width:0px;" /></body>
' </html>

Dim email As New Chilkat.Email
success = email.LoadEml("qa_data/eml/embedded_html_image.eml")

email.ConvertInlineImages()
Debug.WriteLine(email.GetMime())

' The MIME after moving the image data to a separate MIME sub-part:

' MIME-Version: 1.0
' Date: Tue, 30 Apr 2019 11:36:34 +0200
' Message-ID: <E5DB5F8A65D671FB4822B22F5309411838F2FC93@PC0VDL0W013>
' Content-Type: multipart/related; boundary="------------020808080005060904000806"
' X-Priority: 3 (Normal)
' From: <admin@chilkatsoft.com>
' To: Matt <matt@chilkat.io>
' Subject: Test
' 
' --------------020808080005060904000806
' Content-Type: text/html; charset=windows-1252
' Content-Transfer-Encoding: quoted-printable
' 
' <html xmlns=3D"http://www.w3.org/1999/xhtml">
' </head></head><body><p>
' <img src=3D"cid:CID-1f73052c-32a7-4abb-8e9d-0afb58c17eed@CHILKATSLICE" widt=
' h=3D"58" height=3D"66" alt=3D"" style=3D"border-width:0px;" /></body>
' </html>
' 
' 
' 
' --------------020808080005060904000806
' Content-Type: image/jpeg; name="image_95EA3073134C.jpeg"
' Content-Transfer-Encoding: base64
' Content-ID: <CID-1f73052c-32a7-4abb-8e9d-0afb58c17eed@CHILKATSLICE>
' 
' /9j/4AAQSkZJRgABAQEA3ADcAAD/2wBDAAIBAQEBAQIBAQECAgICAgQDAgICAgUEBAMEBgUGBgYF
' BgYGBwkIBgcJBwYGCAsICQoKCgoKBggLDAsKDAkKCgr/2wBDAQICAgICAgUDAwUKBwYHCgoKCgoK
' ...
' 5bmGF7e42pOwUxrFNEQOcLGw6vX2Yv7NfxbWLYfB67s84vrf/wCLoor8r424ZwGYZkqlSUk+VLRr
' /Jn2mS8QYzC0Woxi9eqf+aGr+zX8XUyW8K9/+f8Ag/8AjlO/4Zs+Ln/Qqf8Ak/b/APxyiivkXwPl
' H88/vj/8ifUR4zzS3ww+5/8AyR//2Q==
' 
' --------------020808080005060904000806--