PowerBuilder

Check if a MIME Part is HTML

Demonstrates the Chilkat Mime.IsHtml method, which returns whether the Content-Type is exactly text/html. It takes no arguments and applies to the current part.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: Finding the HTML part is the common goal when rendering a message richly — it is the formatted version a mail client prefers. In a multipart/alternative you would locate it with this predicate and fall back to the plain-text part when it is absent.

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integer li_rc
integer li_Success
oleobject loo_Mime
integer n
oleobject loo_Part
integer i

li_Success = 0

//  Demonstrates the Mime.IsHtml method, which returns whether the Content-Type is text/html.  It takes no arguments and applies to the current
//  part.  This example iterates the parts of a multipart message and reports which ones match.

loo_Mime = create oleobject
li_rc = loo_Mime.ConnectToNewObject("Chilkat.Mime")
if li_rc < 0 then
    destroy loo_Mime
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_Mime.LoadMimeFile("qa_data/multipart_message.eml")
if li_Success = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    return
end if

n = loo_Mime.NumParts
loo_Part = create oleobject
li_rc = loo_Part.ConnectToNewObject("Chilkat.Mime")

for i = 0 to n - 1
    li_Success = loo_Mime.PartAt(i,loo_Part)
    if li_Success = 0 then
        Write-Debug loo_Mime.LastErrorText
        destroy loo_Mime
        destroy loo_Part
        return
    end if

    if loo_Part.IsHtml() then
        Write-Debug "Part " + string(i) + " (" + loo_Part.ContentType + ") is HTML."
    end if

next


destroy loo_Mime
destroy loo_Part