使用 ServiceRoute 时指定 WCF 绑定

问题描述

我目前正在使用以下代码注册 WCF 服务:

I am currently registering a WCF service using the following code:

var factory = new DefaultServiceHostFactory();
RouteTable.Routes.Add(new ServiceRoute("XXXEndPoint", factory, IXXXEndPoint)));

这一切都很好，但是我还需要更改读取器配额设置的 MaxStringContentLength 属性.似乎使用了默认值 8192，无论我尝试更改它，我猜这是来自 DefaultServiceModel?

This is all well and good however I also need to change the MaxStringContentLength property of the reader quota settings. It appears that the default value of 8192 is used, regardless of my attempts to change this and I guess this is from the DefaultServiceModel?

是否有任何合适的钩子可以覆盖 DefaultServiceModel 上的此设置，或者我应该派生自己的服务主机/模型类，还是我这样做是错误的?

Are there any suitable hooks to override this setting on the DefaultServiceModel, or should I be deriving my own service host/model classes, or am I going about this the wrong way?

任何建议表示赞赏.

请注意绑定的配置必须以编程方式执行(而不是通过配置文件).

Please note that the configuration of the binding must be performed programatically (not via configuration files).

谢谢

推荐答案

可以通过扩展宿主工厂来实现.通过对下面的代码稍加修改，您可以将附加参数传递给 WCFServiceHostFactory 以从 Global.asax 设置它我已经使用下面的类将其设置为 Int32.MaxValue

You can make it by extending host factory.By little modification of code bellow you can pass an additional parameter to WCFServiceHostFactory to set it from Global.asaxI have used the classes bellow to always set it to Int32.MaxValue

//在 Global.asax 中

//in Global.asax

routes.Add(new ServiceRoute(routePrefix,
            new WCFServiceHostFactory(),
            serviceType));

//WCFServiceHostFactory.cs

//WCFServiceHostFactory.cs

namespace MyServices.MyService
{
    public class WCFServiceHostFactory:WebServiceHostFactory
    {
        protected override ServiceHost CreateServiceHost(Type serviceType, Uri[] baseAddresses)
        {
            WCFServiceHost host = new WCFServiceHost(serviceType, baseAddresses);

            return host;
        }
    }
}

//WCFServiceHost.cs

//WCFServiceHost.cs

namespace MyServices.MyService
{
    public class WCFServiceHost:WebServiceHost
    {
        public WCFServiceHost(): base ()
        {
        }

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

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



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

          foreach (Uri baseAddress in BaseAddresses) {
            bool found = false;
            foreach (ServiceEndpoint se in Description.Endpoints)
                if (se.Address.Uri == baseAddress)
                {
                    found = true;
                    ((WebHttpBinding)se.Binding).ReaderQuotas.MaxStringContentLength = Int32.MaxValue;//here you set it and also set it below
                }
            if (!found) {
              if (ImplementedContracts.Count > 1)
                throw new InvalidOperationException ("Service '"+ Description.ServiceType.Name + "' implements multiple ServiceContract types, and no endpoints are defined in the configuration file. WebServiceHost can set up default endpoints, but only if the service implements only a single ServiceContract. Either change the service to only implement a single ServiceContract, or else define endpoints for the service explicitly in the configuration file. When more than one contract is implemented, must add base address endpoint manually");
              var  enumerator = ImplementedContracts.Values.GetEnumerator ();
              enumerator.MoveNext ();
              Type contractType = enumerator.Current.ContractType;
              WebHttpBinding binding = new WebHttpBinding();
              binding.ReaderQuotas.MaxStringContentLength = Int32.MaxValue; //here also
          AddServiceEndpoint (contractType, binding, baseAddress);
            }

          }

          foreach (ServiceEndpoint se in Description.Endpoints)
            if (se.Behaviors.Find<WebHttpBehavior> () == null)
              se.Behaviors.Add (new WebHttpBehavior ());

          // disable help page.
          ServiceDebugBehavior serviceDebugBehavior = Description.Behaviors.Find<ServiceDebugBehavior> ();
          if (serviceDebugBehavior != null) {
            serviceDebugBehavior.HttpHelpPageEnabled = false;
            serviceDebugBehavior.HttpsHelpPageEnabled = false;
          }
        }
    }
}

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