CODEWITHSUNDEEP
c#.netxmlwcfsoap
jeff.eynon
jeff.eynon

Reputation: 1326

Re-writing WCF Message using IClientMessageInspector

I am calling a vendor web service and the schema of their calls requires custom namespaces in the body tag like this:

<s:Body xmlns:ddw="http://www.infinity.com/bpm/model/OmniLinkServices/DDWEBCallInput" 
        xmlns:omn="http://eclipse.org/stardust/models/generated/OmniLinkServices">

I could not find a good way via attribute configurations, binding configurations, etc to add this namespace, so I created an implementation of IClientMessageInspector to add the namespaces to the body tag. It works, but then the body of the message becomes:

<s:Body xmlns:ddw="http://www.infinity.com/bpm/model/OmniLinkServices/DDWEBCallInput" 
   xmlns:omn="http://eclipse.org/stardust/models/generated/OmniLinkServices">
   ... stream ...
</s:Body>

Note the odd ... stream ... contents of the body.

This is my implementation of BeforeSendRequest on IClientMessageInspector

public object BeforeSendRequest(ref Message request, IClientChannel channel)
{
        //Copy old message into XPathNavigator so as first step in transforming it to (newer) XDocument for modification
        Message newMessage = null;
        MessageBuffer msgbuf = request.CreateBufferedCopy(int.MaxValue);
        XPathNavigator nav = msgbuf.CreateNavigator();

        //load the old message into message stream via XmlWriter
        MemoryStream ms = new MemoryStream();
        XmlWriter xw = XmlWriter.Create(ms);
        nav.WriteSubtree(xw);
        xw.Flush();
        xw.Close();
        ms.Position = 0;

        //load the XDocument from the XmlREader
        XDocument xDoc = XDocument.Load(XmlReader.Create(ms));
        ms.Close();

        //add the sungard namespaces to the body of the message
        var body = (from x in xDoc.Descendants() where x.Name.LocalName == "Body" select x).First();
        var ddwns = new XAttribute(XNamespace.Xmlns + "ddw", "http://www.infinity.com/bpm/model/OmniLinkServices/DDWEBCallInput");
        var omnns = new XAttribute(XNamespace.Xmlns + "omn", "http://eclipse.org/stardust/models/generated/OmniLinkServices");
        body.Add(ddwns);
        body.Add(omnns);

        //create the new message
        //write the XDoc back out to memory stream
        MemoryStream newMsg = new MemoryStream();
        xw = XmlWriter.Create(newMsg);            
        xDoc.Save(xw);
        xw.Flush();
        xw.Close();
        newMsg.Position = 0;

        //create the new message        
        XmlReader reader = XmlReader.Create(newMsg);
        newMessage = Message.CreateMessage(reader, int.MaxValue, request.Version);
        request = newMessage;
        return null;
}

At the very end of the function, the XDocument still has valid XML, but when I create the message at the end, that seems to be where the problem occurs.

Anybody have any thoughts?

Upvotes: 2

Views: 1007

Answers (1)

jeff.eynon
jeff.eynon

Reputation: 1326

It appears that this is just the way WCF was logging the message. Looking at fiddler the entire xml is going through. I don't understand why WCF would log this way but whatever.

FYI for anybody else who runs into this.

Upvotes: 1

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