DataFlex

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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DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoMime
    Integer n
    Variant vPart
    Handle hoPart
    Integer i
    String sTemp1
    Boolean bTemp1

    Move False To iSuccess

    //  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.

    Get Create (RefClass(cComChilkatMime)) To hoMime
    If (Not(IsComObjectCreated(hoMime))) Begin
        Send CreateComObject of hoMime
    End
    Get ComLoadMimeFile Of hoMime "qa_data/multipart_message.eml" To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoMime To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComNumParts Of hoMime To n
    Get Create (RefClass(cComChilkatMime)) To hoPart
    If (Not(IsComObjectCreated(hoPart))) Begin
        Send CreateComObject of hoPart
    End

    For i From 0 To (n - 1)
        Get pvComObject of hoPart to vPart
        Get ComPartAt Of hoMime i vPart To iSuccess
        If (iSuccess = False) Begin
            Get ComLastErrorText Of hoMime To sTemp1
            Showln sTemp1
            Procedure_Return
        End

        Get ComIsXml Of hoPart To bTemp1
        If (bTemp1) Begin
            Get ComContentType Of hoPart To sTemp1
            Showln "Part " i " (" sTemp1 ") is XML."
        End

    Loop



End_Procedure