CustomMessageInspector

CustomMessageInspector.cs

using System;
using System.IO;
using System.Net;
using System.Security.Policy;
using System.ServiceModel.Channels;
using System.ServiceModel.Dispatcher;
using System.Xml;

namespace APIServiceConsumer.Services
{
    public class ClientMessageInspector : IClientMessageInspector
    {
        public string LastRequestXml { get; private set; }
        public string LastResponseXml { get; private set; }
        public void AfterReceiveReply(ref Message reply, object correlationState)
        {
            LastResponseXml = reply.ToString();
        }

        public object BeforeSendRequest(ref Message request, System.ServiceModel.IClientChannel channel)
        {
            LastRequestXml = request.ToString();
            var xmlPayload = ChangeMessage();
            var ms = new MemoryStream();
            var writer = new StreamWriter(ms);
            writer.Write(xmlPayload);
            writer.Flush();
            ms.Position = 0;

            var reader = XmlReader.Create(ms);
            request = Message.CreateMessage(reader, int.MaxValue, request.Version);
            var payload = request.ToString();
            return request;
        }

        /// Manipulate the SOAP message
        private string ChangeMessage()
        {
            // LastRequestXML is a string here. You can change it to your heart's content
            // Sample example here
            
            // NOTE - I couldn't load the string into an XDocument or XMLDocument as it was throwing all sort of errors
            // about undefined namespaces. String manipulation to the rescue!
            
            // strip out the envelope and header
            var startIndexOfStringToKeep = LastRequestXml.IndexOf("RequestHeader", StringComparison.CurrentCulture);
            
            // strip out the footer
            var sanitizedRequestXml = LastRequestXml.Substring(startIndexOfStringToKeep - 1);
            var firstPhase = sanitizedRequestXml.Replace(@"</s:Envelope>", string.Empty);
            var secondPhase = test.Replace(@"</s:Body>", string.Empty);
            var thirdPhase = test2.Replace(@"</SomeServiceRequest>", string.Empty);
            
            // wrap the body with the right element declarations sans any namespaces
            var bodyRequestXml = "<SomeServiceRequest>" + thirdPhase + "</SomeServiceRequest>";

            
            var document = new XmlDocument();
            var root = document.CreateElement("s", "Envelope", "http://schemas.xmlsoap.org/soap/envelope/");
            root.SetAttribute("xmlns:s", "http://schemas.xmlsoap.org/soap/envelope/");
            root.SetAttribute("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
            root.SetAttribute("xmlns:xsd", "http://www.w3.org/2001/XMLSchema");
            root.SetAttribute("xmlns", "http://www.randomnamespaceroot.co.uk/SomeServiceIdentification");
            document.AppendChild(root);

            var bodyHeader = document.CreateElement("s", "Body", "http://schemas.xmlsoap.org/soap/envelope/");
            root.AppendChild(bodyHeader);

            var body = document.CreateElement("IdentifyCustomerRequest", "http://www.randomnamespaceroot.co.uk/SomeServiceIdentification");
            bodyHeader.AppendChild(body);

            var replacedString = GetPayloadString(document);
            var removedString = replacedString.Replace(@"<IdentifyCustomerRequest />", bodyRequestXml);

            return removedString;
        }

        /// Helper method to get the XMLDocument format right
        private string GetPayloadString(XmlDocument document)
        {
            var settings = new XmlWriterSettings();
            settings.OmitXmlDeclaration = true;
            using (var stringWriter = new StringWriter())
            using (var xmlTextWriter = XmlWriter.Create(stringWriter, settings))
            {
                document.WriteTo(xmlTextWriter);
                xmlTextWriter.Flush();
                return stringWriter.GetStringBuilder().ToString();
            }
        }
    }
}

Added c# language setting

added .cs file extension

Fixed issue with wrong class name

Added closing brackets :)

Thanks, this concept was useful