Visual FoxPro

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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LOCAL lnSuccess
LOCAL loMime
LOCAL lcBoundary

lnSuccess = 0

loMime = CreateObject('Chilkat.Mime')
lnSuccess = loMime.LoadMimeFile("qa_data/message.eml")
IF (lnSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    CANCEL
ENDIF

*  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.
lcBoundary = loMime.GetHeaderFieldAttribute("Content-Type","boundary")
IF (loMime.LastMethodSuccess = 0) THEN
    ? loMime.LastErrorText
    RELEASE loMime
    CANCEL
ENDIF

? "Content-Type boundary: " + lcBoundary

RELEASE loMime