我目前正在使用以下代码注册WCF服务:
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阅读器配额设置的MaxStringContentLength属性。似乎使用了默认值8192,无论我是否尝试更改此设置,我想这是来自DefaultServiceModel?
是否有任何合适的钩子来覆盖DefaultServiceModel上的这个设置,或者我应该派生自己的服务主机/模型类,还是我错误的方式?
任何建议表示赞赏。
编辑: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)。
由于
答案 0 :(得分:13)
您可以通过扩展主机工厂来实现。 通过稍微修改代码,您可以将其他参数传递给WCFServiceHostFactory,以便从Global.asax设置它 我使用下面的类总是将它设置为Int32.MaxValue
//在Global.asax
中routes.Add(new ServiceRoute(routePrefix,
new WCFServiceHostFactory(),
serviceType));
// 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
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;
}
}
}
}