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How to override WebServiceHostFactory MaxReceivedMessageSize?

由 时光怂恿深爱的人放手 提交于 2019-12-04 04:52:50

If you are implementing your own custom service host you should be able to override a method called "ApplyConfiguration" where you can associate all the configuration properties you need for your binding. Some sample code as shown below:

EDIT: Adding my servicehost factory implementation

public class MyServiceHost : System.ServiceModel.ServiceHost
{
    public MyServiceHost () { }

    public MyServiceHost (Type serviceType, params Uri[] baseAddresses) : base(serviceType, baseAddresses)
    {

    }

    public MyServiceHost (object singletonInstance, params Uri[] baseAddresses) : base(singletonInstance, baseAddresses)
    {

    }

protected override void ApplyConfiguration()
            {
                Console.WriteLine("ApplyConfiguration (thread {0})", System.Threading.Thread.CurrentThread.ManagedThreadId);
                base.ApplyConfiguration();
                foreach (ServiceEndpoint endpoint in this.Description.Endpoints)
                {
                    Binding binding = endpoint.Binding;
                    var binding = endpoint.Binding;
                    if(binding is WebHttpBinding)
                    {
                        var web = binding as WebHttpBinding;
                        web.MaxBufferSize = 2000000;
                        web.MaxReceivedMessageSize = 2000000;
                    }
                    var myReaderQuotas = new XmlDictionaryReaderQuotas();
                    myReaderQuotas.MaxStringContentLength = 5242880;
                    binding.GetType().GetProperty("ReaderQuotas").SetValue(binding, myReaderQuotas, null); 
                }
            }

}

The above does override your configuration of each binding and sets the MaxStringContentLength.

public sealed class MyServiceHostFactory : System.ServiceModel.Activation.ServiceHostFactory
    {
        public override System.ServiceModel.ServiceHostBase CreateServiceHost(string constructorString, Uri[] baseAddresses)
        {
            return base.CreateServiceHost(constructorString, baseAddresses);
        }

        protected override System.ServiceModel.ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
        {
            return new MyServiceHost(serviceType, baseAddresses);
        }
    }

Now my Service.svc file markup has this:

<%@ ServiceHost Language="C#" Debug="true" Factory="Sample.MyServiceHostFactory" Service="Sample.ReaderQuotasService" CodeBehind="ReaderQuotasService.svc.cs" %>

For the benefit of others, the above answer goes down the right path but has many errors in it and will not work without changes (hence the OP couldn't get the solution to work). Use the following and it will work for you 'out of the box'.

Note - It is extremely important to provide all the below constructors and use the constructor overload demonstrated in the factory, otherwise you will get the following error message:

InitializeRuntime requires that the Description property be initialized. Either provide a valid ServiceDescription in the CreateDescription method or override the InitializeRuntime method to provide an alternative implementation

Custom ServiceHost implementation:

public class CustomServiceHost : ServiceHost
{
    public CustomServiceHost()
    {
    }

    public CustomServiceHost(object singletonInstance, params Uri[] baseAddresses) : base(singletonInstance, baseAddresses)
    {
    }

    public CustomServiceHost(Type serviceType, params Uri[] baseAddresses) : base(serviceType, baseAddresses)
    {
    }

    protected override void  OnOpening()
    {
        base.OnOpening();

        foreach (var endpoint in this.Description.Endpoints)
        {
            var binding = endpoint.Binding;
            var web = binding as WebHttpBinding;

            if (web != null)
            {
                web.MaxBufferSize = 2147483647;
                web.MaxReceivedMessageSize = 2147483647;
            }

            var myReaderQuotas = new XmlDictionaryReaderQuotas { MaxStringContentLength = 2147483647 };

            binding.GetType().GetProperty("ReaderQuotas").SetValue(binding, myReaderQuotas, null);
        }
    }
}

Custom ServiceHostFactory implementation:

public sealed class CustomServiceHostFactory : ServiceHostFactory
{
    protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
    {
        return new CustomServiceHost(serviceType, baseAddresses);
    }
}

The Service1.svc markup above will work as long as the type is correct. I actually used this technique to override WebServiceHost and allow larger JSON response sizes, but the principles should all apply to ServiceHost as well.

标签
wcf
rest
wcf-binding
maxreceivedmessagesize
webservicehost
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