我制作了一个 Azure Web 应用程序,其中包含 ASP.NET Web,其中还包含一些 JSON WCF 服务。我真的对 WCF 服务模型了解不够,无法确保我做得正确,这对您来说正确吗?是否还有其他服务模型配置能够更好地实现可扩展性、最大并发连接数等?
<system.serviceModel>
<behaviors>
<serviceBehaviors>
<behavior name="">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="true" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" aspNetCompatibilityEnabled="true" />
</system.serviceModel>
<system.net>
<settings>
<!-- See http://social.msdn.microsoft.com/Forums/en-US/windowsazuredata/thread/d84ba34b-b0e0-4961-a167-bbe7618beb83 -->
<servicePointManager expect100Continue="false" />
</settings>
</system.net>
这可行,但我偶尔会遇到意外的连接丢失(超时),并且在我的开发环境中没有 HTTP 错误代码,这让我很担心。
更新于 2011 年 11 月 24 日
web.config
<system.net>
<connectionManagement>
<!-- See http://social.msdn.microsoft.com/Forums/en-US/windowsazuredata/thread/d84ba34b-b0e0-4961-a167-bbe7618beb83 -->
<add address="*" maxconnection="48" />
</connectionManagement>
</system.net>
我怀疑可能是 Visual Studio Web 服务器导致 Ajax 调用超时,几分钟后服务开始再次接受请求。这是我的完整设置,你能看出问题出在哪里吗?我对该服务只有一次 Ajax 调用。
接口(interface)
IExample.cs:
using System.ServiceModel;
using System.ServiceModel.Web;
namespace WebPages.Interfaces
{
[ServiceContract]
public interface IExample
{
[OperationContract]
[WebInvoke(Method = "GET",
ResponseFormat = WebMessageFormat.Json)]
string GetSomething(string id);
}
}
ExampleService.svc.cs 标记
<%@ ServiceHost Language="C#" Debug="true" Service="WebPages.Interfaces.ExampleService" CodeBehind="ExampleService.svc.cs" Factory="System.ServiceModel.Activation.WebServiceHostFactory" %>
ExampleService.svc.cs 代码隐藏
namespace WebPages.Interfaces
{
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class ExampleService : IExample
{
string JsonSerializeSomething(Something something)
{
var serializer = new DataContractJsonSerializer(something.GetType());
var memoryStream = new MemoryStream();
serializer.WriteObject(memoryStream, something);
return Encoding.Default.GetString(memoryStream.ToArray());
}
public string GetSomething(string id)
{
var something = DoSomeBusinessLogic(id);
return JsonSerializeSomething(something);
}
}
}
来自客户端的 jQuery 调用
function _callServiceInterface(id, delegate) {
var restApiCall = "Interfaces/ExampleService.svc/GetSomething?id="
+ escape(id);
$.getJSON(restApiCall, delegate);
}
function _getSomethingFromService() {
_callServiceInterface('123',
function (result) {
var parsedResult = $.parseJSON(result);
$('#info').html(result.SomethingReturnedFromServiceCall);
}
);
}
更新
我想我现在知道问题是什么了;看来WCF服务默认是单线程的(来源:http://msdn.microsoft.com/query/dev10.query?appId=Dev10IDEF1&l=EN-US&k=k(SYSTEM.SERVICEMODEL.SERVICEBEHAVIORATTRIBUTE.CONCURRENCYMODE);k(TargetFrameworkMoniker-%22.NETFRAMEWORK%2cVERSION%3dV4.0%22);k(DevLang-CSHARP)&rd=true)。这解释了为什么我的 Ajax 调用会超时,它被另一个线程阻塞。这段代码应该可以更好地工作:
ExampleService.svc.cs
[ServiceBehavior(ConcurrencyMode = ConcurrencyMode.Multiple, InstanceContextMode = InstanceContextMode.PerSession,
IncludeExceptionDetailInFaults = false, MaxItemsInObjectGraph = Int32.MaxValue)]
//[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
public class ExampleService : IExample
web.config
<system.serviceModel>
<protocolMapping>
<add scheme="http" binding="webHttpBinding" bindingConfiguration="" />
</protocolMapping>
<behaviors>
<endpointBehaviors>
<behavior name="">
<webHttp defaultOutgoingResponseFormat="Json" />
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="">
<serviceMetadata httpGetEnabled="true" />
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>
ExampleService.svc
<%@ ServiceHost Language="C#" Debug="true" Service="WebPages.Interfaces.TagService" CodeBehind="TagService.svc.cs" %>
2011 年 10 月 9 日更新
我想我在这里得到了我需要的答案 Locking with ConcurrencyMode.Multiple and InstanceContextMode.PerCall
aspNetCompatibilityEnabled="false"
表示无法在我的 WCF 代码中访问 HttpContext
、ASP.NET session 等。
最佳答案
我想我在这里得到了我需要的答案 Locking with ConcurrencyMode.Multiple and InstanceContextMode.PerCall
aspNetCompatibilityEnabled="false"
表示无法在我的 WCF 代码中访问 HttpContext
、ASP.NET session 等。
关于wcf - aspNet兼容性启用="true",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7375311/