Xbase++

Check if a MIME Part is XML

Demonstrates the Chilkat Mime.IsXml method, which returns true only for text/xml or application/xml. 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: Identifying an XML part matters in machine-to-machine messaging — SOAP, EDI, structured data payloads — where you want to hand the body to an XML parser. Note it matches only the two canonical XML media types and not structured-suffix types like application/xhtml+xml, so check the exact type when those are relevant.

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LOCAL nSuccess
LOCAL oMime
LOCAL n
LOCAL oPart
LOCAL i

nSuccess := 0

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

oMime := CreateObject("Chilkat.Mime")
nSuccess := oMime:LoadMimeFile("qa_data/multipart_message.eml")
IF (nSuccess == 0)
    ? oMime:LastErrorText
    oMime:destroy()
    RETURN
ENDIF

n := oMime:NumParts
oPart := CreateObject("Chilkat.Mime")

FOR i := 0 TO n - 1
    nSuccess := oMime:PartAt(i, oPart)
    IF (nSuccess == 0)
        ? oMime:LastErrorText
        oMime:destroy()
        oPart:destroy()
        RETURN
    ENDIF

    IF (oPart:IsXml())
        ? "Part " + Str(i) + " (" + oPart:ContentType + ") is XML."
    ENDIF

NEXT

oMime:destroy()
oPart:destroy()