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POWCF Custom JSONP Binding and httpsTransport
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  1. POWCF Custom JSONP Binding and httpsTransport
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    copied!<p>My question revolves around a WCF REST Service for IIS that responds with JSONP. I took the classes in this solution: <a href="http://msdn.microsoft.com/en-us/library/cc716898.aspx" rel="nofollow noreferrer">http://msdn.microsoft.com/en-us/library/cc716898.aspx</a> and added them to mine. Things were working fine on my developer workstation using impersonation with httpTransport but when I tried to move up to the development server I ran into some security issues. These issues were solved using the configuration below and an App Pool identity user. I also configuring the IIS metabase file for NTLM only authentication (we are using IIS 6 but will be IIS 7 soon, needs to work on both) as I don't have access to make an SPN. I believe the current configuration solved my security problems <strong>but in the process my JSONP response was downgraded to regualar JSON</strong>, this is the problem. Here is the relevant configuration:</p> <pre><code> &lt;services&gt; &lt;service name="IS.Core.Infrastructure.RESTRouter.Transactions" behaviorConfiguration=""&gt; &lt;endpoint address="" behaviorConfiguration="webHttp" binding="customBinding" bindingConfiguration="jsonpBinding" contract="IS.Core.Infrastructure.RESTRouter.ITransactions"&gt; &lt;/endpoint&gt; &lt;/service&gt; &lt;service name="IS.Core.Infrastructure.RESTRouter.Queue" behaviorConfiguration=""&gt; &lt;endpoint address="" behaviorConfiguration="webHttp" binding="customBinding" bindingConfiguration="jsonpBinding" contract="IS.Core.Infrastructure.RESTRouter.IQueue" /&gt; &lt;/service&gt; &lt;/services&gt; &lt;behaviors&gt; &lt;endpointBehaviors&gt; &lt;behavior name="webHttp"&gt; &lt;webHttp /&gt; &lt;/behavior&gt; &lt;/endpointBehaviors&gt; &lt;/behaviors&gt; &lt;bindings&gt; &lt;customBinding&gt; &lt;binding name="jsonpBinding"&gt; &lt;jsonpMessageEncoding /&gt; &lt;httpsTransport manualAddressing="true" authenticationScheme="Ntlm" /&gt; &lt;/binding&gt; &lt;/customBinding&gt; &lt;/bindings&gt; &lt;extensions&gt; &lt;bindingElementExtensions&gt; &lt;add name="jsonpMessageEncoding" type="IS.Core.Infrastructure.RESTRouter.JsonpBindingExtension, RESTRouter, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" /&gt; &lt;/bindingElementExtensions&gt; &lt;/extensions&gt; </code></pre> <p>Here is one of the interface method definitions:</p> <pre><code> [OperationContract] [WebGet(UriTemplate = "{ModelPath}/{ObjectTypeName}?callback={callback}", ResponseFormat = WebMessageFormat.Json)] [JSONPBehavior(callback = "callback")] JSONPXml NewObject(string ModelPath, string ObjectTypeName, string callback); </code></pre> <p>Here is its implementation:</p> <pre><code> [OperationBehavior(Impersonation = ImpersonationOption.Allowed)] public JSONPXml NewObject(string ModelPath, string ObjectTypeName, string callback) { int val = getEmployeeIdByNTUsername(OperationContext.Current.ServiceSecurityContext.PrimaryIdentity.Name); JSONPXml jsp = null; EntityPluginReflectorClient client = null; try { client = new EntityPluginReflectorClient(); string output = client.NewObject(ModelPath, ObjectTypeName); jsp = new JSONPXml() { xml = output }; } catch (Exception e) { InfrastructureLog.WriteException(this, "NewObject", e); jsp = getExceptionResponse(e); } finally { client.Close(); } return (jsp); } </code></pre> <p>and here is the data contract:</p> <pre><code>[DataContract()] public class JSONPXml { public JSONPXml() { } [DataMember] public string xml; } </code></pre> <p>Please let me know if more information is needed and thanks for looking into this.</p>
 

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