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POWCF WebServiceHostFactory MaxReceivedMessageSize configuration
 

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  1. POWCF WebServiceHostFactory MaxReceivedMessageSize configuration
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    <p>I have a <strong>RESTful WCF web service</strong> called "Palladium" as a project in my VS2008 solution. It is hosted in an ASP.Net 3.5 Web Application using the <strong>WebServiceHostFactory</strong> implementation via a page called "Palladium.svc". </p> <p>My service works in a manner similar to the one explained <a href="http://blogs.msdn.com/b/carlosfigueira/archive/2008/04/17/wcf-raw-programming-model-receiving-arbitrary-data.aspx" rel="nofollow">here</a>, whereby POSTs can be received by the service along with other parameters as defined in the URITemplate.</p> <p>The service works well, and I can receive posted information and work with it.<br> My problem occurs when the post data exceeds 65k and I get the following error (obtained using <code>system.diagnostics</code> in the web.config and Microsoft Service Trace Viewer). </p> <blockquote> <p>The maximum message size quota for incoming messages (65536) has been exceeded. To increase the quota, use the MaxReceivedMessageSize property on the appropriate binding element.</p> </blockquote> <p>Because the service is hosted via the WebServiceHostFactory implementation, the service has default bindings set up for it by the factory. I attempted to override these bindings by providing binding settings and endpoints in the web.config file. When I did this however, I got an error message saying:</p> <blockquote> <p>System.InvalidOperationException, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 </p> <p>For request in operation LogStartingDetails to be a stream the operation must have a single parameter whose type is Stream.</p> </blockquote> <p><code>LogStartingDetails</code> is the method I'm calling in my RESTful service. </p> <p>Obviously the <code>LogStartingDetails</code> method doesn't need to have a single parameter whose type is <code>Stream</code>, as when the factory was creating the bindings for me the service was responding well (or more to the point, it <em>didn't</em> need to have a single parameter when the factory was doing the work for me). </p> <p>After much research and hitting several brick walls, I decided to create my own class that inherits from <code>WebServiceHostFactory</code> and overrides some of the implementation in order to specify the <strong>MaxReceivedMessageSize</strong> property on the binding.<br> When I step through the service creation in my factory class via debug, I can see the transport receiving the new <strong>MaxReceivedMessageSize</strong> and <strong>MaxBufferSize</strong> values, but they don't appear to do anything and I still end up getting the same <code>The maximum message size quota for incoming messages (65536) has been exceeded.</code> exception thrown. </p> <p>Below are examples of my service code. If someone could help me figure out what I'm doing wrong here, it would be much appreciated.</p> <p><strong>Palladium.svc</strong> (hosted in the ASP.Net Web Application)</p> <pre><code>&lt;%@ ServiceHost Language="C#" Debug="true" Service="CDS.PalladiumService.Palladium" Factory="CDS.PalladiumService.MyWebServiceHostFactory" %&gt; </code></pre> <p><strong>MyWebServiceHostFactory.cs</strong> (in the CDS.PalladiumService project)</p> <pre><code>using System; using System.ServiceModel; using System.ServiceModel.Activation; using System.ServiceModel.Channels; using System.ServiceModel.Web; namespace CDS.PalladiumService { public class MyServiceHost : WebServiceHost { public MyServiceHost() { } public MyServiceHost(object singletonInstance, params Uri[] baseAddresses) : base(singletonInstance, baseAddresses) { } public MyServiceHost(Type serviceType, params Uri[] baseAddresses) : base(serviceType, baseAddresses) { } protected override void OnOpening() { base.OnOpening(); if (base.Description != null) { foreach (var endpoint in base.Description.Endpoints) { var transport = endpoint.Binding.CreateBindingElements().Find&lt;TransportBindingElement&gt;(); if (transport != null) { transport.MaxReceivedMessageSize = 5242880; transport.MaxBufferPoolSize = 5242880; } } } } } class MyWebServiceHostFactory : WebServiceHostFactory { protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses) { return new MyServiceHost(serviceType, baseAddresses); } } } </code></pre> <p><strong>IPalladium.cs</strong> (in the CDS.PalladiumService project)</p> <pre><code>using System.IO; using System.ServiceModel; using System.ServiceModel.Web; namespace CDS.PalladiumService { // NOTE: If you change the interface name "IPalladium" here, you must also update the reference to "IPalladium" in Web.config. [ServiceContract] public interface IPalladium { [OperationContract] [WebInvoke(Method = "POST", UriTemplate = UriTemplate.LogStartingDetails)] void LogStartingDetails(string truckId, string palladiumId, Stream postData); } } </code></pre> <p><strong>Palladium.cs</strong> (in the CDS.PalladiumService project)</p> <pre><code>using System.IO; using System.ServiceModel.Activation; namespace CDS.PalladiumService { // NOTE: If you change the class name "Palladium" here, you must also update the reference to "Palladium" in Web.config. [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] public class Palladium : IPalladium { public void LogStartingDetails(string truckId, string palladiumId, Stream postData) { string contents = string.Empty; using (var reader = new StreamReader(postData)) { contents = reader.ReadToEnd(); } StreamWriter sw1 = File.AppendText(@"C:\log.txt"); sw1.WriteLine(contents); sw1.WriteLine(""); sw1.Close(); return; } } } </code></pre> <p><strong>URITemplate.cs</strong> (in the CDS.PalladiumService project)</p> <pre><code>namespace CDS.PalladiumService { public static class UriTemplate { public const string LogStartingDetails = "/log-starting/{truckId}/{palladiumId}"; } } </code></pre>
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