POX (Plain-Old-Xml) service using Stream parameters

I want to develop a WCF service, which will receive various XMLs and save them for fu开发者_运维问答rther processing. I can't stick to particular data type, because the incoming XMLs will be totally different. So far I've chosen the approach using Stream parameters:

[ServiceContract]
public interface IApiService
{
    [WebInvoke(Method = "POST",
        UriTemplate = "getXml",
        BodyStyle = WebMessageBodyStyle.Bare)]
    [OperationContract]
    Stream getXml(Stream request);
}

I am returning some text for response. The service will be called by external application and I want to stay away from .NET-specific issues.

Is there a better approach to do it?

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If the XML which you'll receive is always well-formed, you can use the XElement or XmlElement types as the input and return values. The former is an IXmlSerializable type which WCF can handle, the latter is a type treated as a special case by the WCF serializer. The advantage is that you have all the XML OM to manipulate the data, and the outgoing content-type will be set automatically for you.

If the input/output isn't necessarily well-formed XML, then your solution (with Stream) is the only one you can use.

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If the XML that is passed can be arbitrary, Stream looks a good solution. You could also use byte[] or even string.