PowerBuilder

Get a MIME Header Field Attribute

Demonstrates the Chilkat Mime.GetHeaderFieldAttribute method, which returns an attribute value parsed from a header field. The first argument is the header field name and the second is the attribute name. Surrounding quotes are removed.

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: Many MIME headers pack extra parameters after the main value — Content-Type: multipart/mixed; boundary="xyz" or Content-Disposition: attachment; filename="report.pdf". This method extracts one of those named attributes directly, saving you from parsing the header string yourself and correctly stripping quotes and handling encoded values.

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integer li_rc
long li_Success
oleobject loo_Mime
string ls_Boundary

li_Success = 0

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/message.eml")
if li_Success = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    return
end if

//  Return an attribute value parsed from a header field.  The 1st argument is the header field
//  name and the 2nd is the attribute name.  For example, the "boundary" attribute of the
//  Content-Type header, or the "filename" attribute of Content-Disposition.
ls_Boundary = loo_Mime.GetHeaderFieldAttribute("Content-Type","boundary")
if loo_Mime.LastMethodSuccess = 0 then
    Write-Debug loo_Mime.LastErrorText
    destroy loo_Mime
    return
end if

Write-Debug "Content-Type boundary: " + ls_Boundary


destroy loo_Mime