Ruby

Add a Related Item from a BinData Object

Demonstrates the Chilkat Email.AddRelatedBd method, which adds a related item (such as an inline image) using the contents of a BinData object, and returns the generated Content-ID. This example loads an image into a BinData, adds it, captures the Content-ID, and references it from the HTML body.

Background: This is the binary, Content-ID-based way to embed an inline resource — the right choice for images, whose bytes belong in a BinData rather than a string. Because Chilkat generates the Content-ID, the usual pattern is: add the item first, capture the returned ID, then build the matching <img src="cid:..."> reference from it (done here with a StringBuilder).

Chilkat Ruby Downloads

Download Chilkat for Ruby

Ruby

require 'chilkat'

success = false

#  Demonstrates the AddRelatedBd method, which adds a related item (such as an inline image)
#  using the contents of a BinData object, and returns the generated Content-ID.

email = Chilkat::CkEmail.new()
email.put_Subject("Related image from BinData")

#  Load the image data from a file into a BinData object.
bdImage = Chilkat::CkBinData.new()
success = bdImage.LoadFile("qa_data/images/logo.png")
if (success == false)
    print bdImage.lastErrorText() + "\n";
    exit
end

#  Add the image as a related item; capture its generated Content-ID.
cid = email.addRelatedBd("logo.png",bdImage)
if (email.get_LastMethodSuccess() == false)
    print email.lastErrorText() + "\n";
    exit
end

#  Reference the related item in the HTML body by its Content-ID.
sbHtml = Chilkat::CkStringBuilder.new()
sbHtml.Append("<html><body><img src=\"cid:PLACEHOLDER_CID\"/></body></html>")
numReplaced = sbHtml.Replace("PLACEHOLDER_CID",cid)
email.SetHtmlBody(sbHtml.getAsString())

print "NumRelatedItems = " + email.get_NumRelatedItems().to_s() + "\n";

#  Note: The path "qa_data/images/logo.png" is a relative local filesystem path,
#  relative to the current working directory of the running application.