Ruby

Iterate MIME Parts of an Email

See more Email Object Examples

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.

Ruby

require 'chilkat'

success = false

# 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

email = Chilkat::CkEmail.new()

success = email.LoadEml("qa_data/eml/sample.eml")
if (success == false)
    print "Failed to load .eml" + "\n";
    exit
end

sbContentType = Chilkat::CkStringBuilder.new()
caseSensitive = false

# 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)
inlineOnly = false
excludeAttachments = false
searchSpec = "*/*"

numParts = email.GetNumPartsOfType(searchSpec,inlineOnly,excludeAttachments)
i = 0
while i < numParts
    # What is the Content-Type of this MIME part?
    sbContentType.Append(email.getNthContentType(i,searchSpec,inlineOnly,excludeAttachments))
    if (sbContentType.StartsWith("text/",caseSensitive) == true)
        # Get the text body of this MIME part.
        textBody = email.getNthTextPartOfType(i,searchSpec,inlineOnly,excludeAttachments)
        print "Got text body for " + sbContentType.getAsString() + "\n";
    else
        if (sbContentType.ContentsEqual("message/rfc822",caseSensitive) == true)
            # 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...
            attachedEmail = Chilkat::CkEmail.new()
            bdMime = Chilkat::CkBinData.new()
            email.GetNthBinaryPartOfTypeBd(i,searchSpec,inlineOnly,excludeAttachments,bdMime)
            attachedEmail.SetFromMimeBd(bdMime)
            # Now your app can recursively process the attachedEmail...
        else
            # Get the bytes of this MIME body part.
            bd = Chilkat::CkBinData.new()
            email.GetNthBinaryPartOfTypeBd(i,searchSpec,inlineOnly,excludeAttachments,bd)
            print "Got binary body for " + sbContentType.getAsString() + " numBytes = " + bd.get_NumBytes().to_s() + "\n";
        end

    end

    sbContentType.Clear()
    i = i + 1
end