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copied!<p>With lots of trial and error I found a very ugly and totally illogic solution to my problem. But still... Maybe this post can help someone in the future. Note that this "solution" works for me in .NET 4.5. I do not guarantee it'll work for you.</p> <p>The problem comes down to this:</p> <ul> <li>it's impossible (AFAIK) to put a escaped forward slash in a Uri in .NET</li> <li>for communicating with an external service (RabbitMQ) I really need to be able put %2f (i.e. forward slash) in my request Url</li> </ul> <p>The following post put me in the "right" direction: <a href="http://mikehadlow.blogspot.be/2011/08/how-to-stop-systemuri-un-escaping.html" rel="nofollow">How to stop System.Uri un-escaping forward slash characters</a></p> <p>I tried the solution proposed in the post, but... to no avail</p> <p>Then after lots of cursing, googling, reverse engineering and so forth i came up with the following piece of code:</p> <pre><code>/// <summary> /// Client enpoint behavior that enables the use of a escaped forward slash between 2 forward slashes in a url /// </summary> public class EncodeForwardSlashBehavior:IEndpointBehavior { public void Validate(ServiceEndpoint endpoint) { } public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) { } public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) { } public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime) { clientRuntime.ClientMessageInspectors.Add(new ForwardSlashUrlInspector()); } } /// <summary> /// Inspector that modifies a an Url replacing /// with /%2f/ /// </summary> public class ForwardSlashUrlInspector:IClientMessageInspector { public object BeforeSendRequest(ref Message request, IClientChannel channel) { string uriString = request.Headers.To.ToString().Replace("///", "/%2f/"); request.Headers.To = new Uri(uriString); AddAllowAnyOtherHostFlagToHttpUriParser(); return null; } /// <summary> /// This is one of the weirdest hacks I ever had to do, so no guarantees can be given to this working all possible scenarios /// What this does is, it adds the AllowAnyOtherHost flag to the private field m_Flag on the UriParser for the http scheme. /// Replacing /// with /%2f/ in the request.Headers.To uri BEFORE calling this method will make sure %2f remains unescaped in your Uri /// Why does this work, I don't know! /// </summary> private void AddAllowAnyOtherHostFlagToHttpUriParser() { var getSyntaxMethod = typeof(UriParser).GetMethod("GetSyntax", BindingFlags.Static | BindingFlags.NonPublic); if (getSyntaxMethod == null) { throw new MissingMethodException("UriParser", "GetSyntax"); } var uriParser = getSyntaxMethod.Invoke(null, new object[] { "http" }); var flagsField = uriParser.GetType().BaseType.GetField("m_Flags", BindingFlags.Instance|BindingFlags.NonPublic); if (flagsField == null) { throw new MissingFieldException("UriParser", "m_Flags"); } int oldValue = (int)flagsField.GetValue(uriParser); oldValue += 4096; flagsField.SetValue(uriParser, oldValue); } public void AfterReceiveReply(ref Message reply, object correlationState) { } } </code></pre> <p>So basically I'm creating a custom EndpointBehavior that uses reflection to add an enum flag to a private variable inside the UriParser. This apparently prevents the escaped forward slash in my request.Headers.To uri from being unescaped.</p>

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