Parse MIME to get Binary Data (such as GIF, JPG, or any binary file)

Demonstrates how to parse a MIME to get binary data. This example extracts the image data for a GIF image to an in-memory byte array, and also to a file.

This example uses a MIME test file located at http://www.chilkatsoft.com/testData/sampleMime2.txt. It contains the following MIME:

Content-Type: multipart/mixed;
 boundary="------------080707010302060306060800"

This is a multi-part message in MIME format.

--------------080707010302060306060800
Content-Type: text/plain
Content-Transfer-Encoding: 7bit

This is the plain-text body.
--------------080707010302060306060800
Content-Disposition: attachment; filename="starfish.gif"
Content-Transfer-Encoding: base64
Content-Type: image/gif; name="starfish.gif"

R0lGODlhIAAgAPcAAP///+/v7/f39+/n5/fv7//39/fn597OzufW1tbGxs69vffe3u/W1salpZQQ
EIQYEJwQCJQYCJwYCM6clL2Ee5wpGIwhEK0YANatpdalnHMYCKUhCJQYAKUYAM6Ec5QhCJwhCPfW
zu/Oxta1rb17a6UhAK0hAPe9rb2Ec7V7a71rUpwpCL0xCJwhAOfOxta9tcatpdallM6cjMaUhK1C
IZwxELU5EK0xCLUxCN61pcacjK1rUrVaOaVKKZxCIZwxCKUxCL05CLUxAM6llO+1nMZzUr1rSrVS
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xufGtcallNaljLWEa96ce9aUc717Wq1aMcZjMbVaKbVSIa1KGL1SGJw5CK1CCLVCCMZKCM5KCMZC
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GL1SEM5aELVKCMZSCNZaCL1KAOfOvc57Qs5jGNZjEM5aCMZSAN5aAO/OtefGrcZjGM5jEN5rELVS
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RZ8cjRWro0QEEsQVGTiKkLAM5QNGFWrAQFNLBIzABQPLRktQQAA7

--------------080707010302060306060800--

Download Chilkat FileAccess ActiveX (freeware)

Download Chilkat MIME ActiveX

LOCAL loMime
LOCAL lnSuccess
LOCAL loPart2
LOCAL loBinaryData
LOCAL loFac
LOCAL lnFacSuccess

loMime = CreateObject('Chilkat.Mime')

lnSuccess = loMime.UnlockComponent("Anything for 30-day trial.")
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    QUIT
ENDIF

*  Load the sampleMime2.txt file into the MIME object.
*  (This file is available at http://www.chilkatsoft.com/testData/sampleMime2.txt )

lnSuccess = loMime.LoadMimeFile("sampleMime2.txt")
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    QUIT
ENDIF

*  The GIF image is the 2nd sub-part located directly under the
*  top-level MIME node.  Indexing begins at 0, therefore the 2nd
*  sub-part is at index 1.

loPart2 = loMime.GetPart(1)

*  The GetBodyBinary method returns the binary bytes
*  of the part's body, automatically decoded from whatever
*  content-transfer-encoding might be used (such as base64).
loBinaryData = loPart2.GetBodyBinary()

*  We now have the binary bytes of the GIF image in binaryData.
*  Save it to a file.
lnFacSuccess = loFac.WriteEntireFile("out1.gif", loBinaryData)
IF (lnFacSuccess = 0) THEN
    =MESSAGEBOX(loFac.LastErrorText)
    QUIT
ENDIF

*  An easier way to save the body content to a file,
*  assuming your application does not need to access
*  the binary data in-memory, is to call SaveBody
lnSuccess = loPart2.SaveBody("out2.gif")
IF (lnSuccess = 0) THEN
    ? loPart2.LastErrorText
    QUIT
ENDIF

RELEASE loPart2

=MESSAGEBOX("Finished.")