(Visual FoxPro) Iterate MIME Parts of an Email

Demonstrates how to iterate over the MIME sub-parts of an email, and retrieve the content of each MIME sub-part body.

Note: This example requires some new features added to Chilkat v9.5.0.95.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

LOCAL loEmail
LOCAL lnSuccess
LOCAL loSbContentType
LOCAL lnCaseSensitive
LOCAL lnInlineOnly
LOCAL lnExcludeAttachments
LOCAL lcSearchSpec
LOCAL lnNumParts
LOCAL i
LOCAL lcTextBody
LOCAL loAttachedEmail
LOCAL loBdMime
LOCAL loBd

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

* See the following Chilkat post to Quickly Understand Email MIME

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Email')
loEmail = CreateObject('Chilkat.Email')

lnSuccess = loEmail.LoadEml("qa_data/eml/sample.eml")
IF (lnSuccess = 0) THEN
    ? "Failed to load .eml"
    RELEASE loEmail
    CANCEL
ENDIF

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbContentType = CreateObject('Chilkat.StringBuilder')
lnCaseSensitive = 0

* Get the total number of non-multipart MIME sub-parts.
* (This is a simple way of iterating over all the MIME leaf parts regardless of the MIME tree structure)
lnInlineOnly = 0
lnExcludeAttachments = 0
lcSearchSpec = "*/*"

lnNumParts = loEmail.GetNumPartsOfType(lcSearchSpec,lnInlineOnly,lnExcludeAttachments)
i = 0
DO WHILE i < lnNumParts
    * What is the Content-Type of this MIME part?
    loSbContentType.Append(loEmail.GetNthContentType(i,lcSearchSpec,lnInlineOnly,lnExcludeAttachments))
    IF (loSbContentType.StartsWith("text/",lnCaseSensitive) = 1) THEN
        * Get the text body of this MIME part.
        lcTextBody = loEmail.GetNthTextPartOfType(i,lcSearchSpec,lnInlineOnly,lnExcludeAttachments)
        ? "Got text body for " + loSbContentType.GetAsString()
    ELSE
        IF (loSbContentType.ContentsEqual("message/rfc822",lnCaseSensitive) = 1) THEN
            * If the Content-Type is message/rfc822, then the MIME body for this part contains a full embedded MIME messages.
            * Your application could load it into a Chilkat email object and recursively process...
            * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Email')
            loAttachedEmail = CreateObject('Chilkat.Email')
            * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
            loBdMime = CreateObject('Chilkat.BinData')
            loEmail.GetNthBinaryPartOfTypeBd(i,lcSearchSpec,lnInlineOnly,lnExcludeAttachments,loBdMime)
            loAttachedEmail.SetFromMimeBd(loBdMime)
            * Now your app can recursively process the attachedEmail...
        ELSE
            * Get the bytes of this MIME body part.
            * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.BinData')
            loBd = CreateObject('Chilkat.BinData')
            loEmail.GetNthBinaryPartOfTypeBd(i,lcSearchSpec,lnInlineOnly,lnExcludeAttachments,loBd)
            ? "Got binary body for " + loSbContentType.GetAsString() + " numBytes = " + STR(loBd.NumBytes)
        ENDIF

    ENDIF

    loSbContentType.Clear()
    i = i + 1
ENDDO

RELEASE loEmail
RELEASE loSbContentType
RELEASE loAttachedEmail
RELEASE loBdMime
RELEASE loBd