将REST API从C＃控制台应用程序迁移并运行到ASP.NET

时间：2019-03-22 10:38:37

标签： c# asp.net asp.net-web-api visual-studio-2015 migration

要求：
需要在Hosting Server上部署REST API。因此，将代码从C＃控制台应用程序迁移到了ASP.NET，该ASP.NET在localhost上成功运行，但出现了一些错误

这是下面的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Net;
using System.Diagnostics;

namespace WebAPI
{
    [ServiceContract]
    public interface ICalculator
    {
        [OperationContract, WebInvoke(UriTemplate = "/sum", Method = "POST", BodyStyle = WebMessageBodyStyle.Wrapped, RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
        double sum(double x, double y);
    }

    public class Calculator : ICalculator
    {
        public double sum(double x, double y)
        {
            return x + y;
        }
    }
    public partial class Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Debug.WriteLine("Initializing URL");
            string baseAddress = "http://localhost:8081/Calculator";
            WebServiceHost myHost = new WebServiceHost(typeof(Calculator), new Uri(baseAddress));

            try
            {
                System.Diagnostics.Debug.WriteLine("Starting Service ...");
                myHost.Open();
            }
            catch (Exception ex)
            {

                //Response.Write(ex);
                //System.Diagnostics.Debug.WriteLine("Exception");
                //myHost.Close();
                //throw new FaultException(ex.Message);
            }
        }

    }
}

实际结果：

通过PostMan客户端软件发出/发送POST请求时，除了显示错误外，还显示了计算值，该错误显示在“调试”窗口的“输出”窗口中。

The thread 0x3104 has exited with code 0 (0x0).
Application Insights Telemetry (unconfigured): {"name":"Microsoft.ApplicationInsights.Dev.Request","time":"2019-03-22T07:52:36.2582149Z","tags":{"ai.internal.sdkVersion":"web: 2.0.0.25000","ai.device.roleInstance":"DESKTOP-5DRIFMH","ai.operation.name":"GET /default.aspx","ai.operation.id":"mHfOluFrMKQ="},"data":{"baseType":"RequestData","baseData":{"ver":2,"id":"mHfOluFrMKQ=","name":"GET /default.aspx","startTime":"2019-03-22T13:22:36.2582149+05:30","duration":"00:00:04.1154559","success":true,"responseCode":"200","url":"http://localhost:29989/default.aspx","httpMethod":"GET","properties":{"DeveloperMode":"true"}}}}
'iisexpress.exe' (CLR v4.0.30319: /LM/W3SVC/2/ROOT-1-131977147547841156): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\System.Transactions\v4.0_4.0.0.0__b77a5c561934e089\System.Transactions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
The thread 0x332c has exited with code 0 (0x0)

刷新页面后，以下代码引发了异常

  

myHost.Close(); 

CommunicationObjectFaultedException was unhandled by user code
An exception of type 'System.ServiceModel.CommunicationObjectFaultedException' occurred in System.ServiceModel.dll but was not handled in user code
Additional information: The communication object, System.ServiceModel.Web.WebServiceHost, cannot be used for communication because it is in the Faulted state.


Exception thrown: 'System.InvalidOperationException' in System.ServiceModel.dll
Exception thrown: 'System.ServiceModel.CommunicationObjectFaultedException' in System.ServiceModel.dll
'iisexpress.exe' (CLR v4.0.30319: /LM/W3SVC/2/ROOT-1-131977214492956233): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\14.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
  

throw new FaultException(ex.Message); 

CommunicationObjectFaultedException was unhandled by user code
An exception of type 'System.ServiceModel.CommunicationObjectFaultedException' occurred in System.ServiceModel.dll but was not handled in user code
Additional information: The communication object, System.ServiceModel.Web.WebServiceHost, cannot be used for communication because it is in the Faulted state.


Exception thrown: 'System.InvalidOperationException' in System.ServiceModel.dll
Exception
Exception thrown: 'System.ServiceModel.CommunicationObjectFaultedException' in System.ServiceModel.dll
'iisexpress.exe' (CLR v4.0.30319: /LM/W3SVC/2/ROOT-1-131977154884215275): Loaded 'C:\Windows\assembly\GAC_MSIL\Microsoft.VisualStudio.Debugger.Runtime\14.0.0.0__b03f5f7f11d50a3a\Microsoft.VisualStudio.Debugger.Runtime.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.

在没有捕获块的情况下，以下异常从“事件”选项卡堆积在“诊断工具”窗口中

Exception: Exception thrown: 'System.InvalidOperationException' in System.ServiceModel.dll ("The ChannelDispatcher at 'http://localhost:8081/Calculator' with contract(s) '"ICalculator"' is unable to open its IChannelListener."). Exception thrown: 'System.InvalidOperationException' in System.ServiceModel.dll ("The ChannelDispatcher at 'http://localhost:8081/Calculator' with contract(s) '"ICalculator"' is unable to open its IChannelListener.")

我将如何捕获这些异常

更改string baseAddress = "http://somedomain.xy:8081/Calculator"; 并将其上传到服务器中 显示为

的PostMan
  

无法获得任何响应连接到时发生错误   http://somedomain.xy:8081/Calculator/sum。

预期结果：
通过PostMan进行调用时，应该显示计算值
由于我需要使服务启动并在托管服务器上运行。由于我既无法找出根本原因，也无法解决整个问题，因此是从编码部分弹出还是从端口出现问题？

2 个答案:

答案 0 :(得分：1)

The thread 0x3104 has exited with code 0 (0x0).
Application Insights Telemetry (unconfigured): {"name":"Microsoft.ApplicationInsights.Dev.Request","time":"2019-03-22T07:52:36.2582149Z","tags":{"ai.internal.sdkVersion":"web: 2.0.0.25000","ai.device.roleInstance":"DESKTOP-5DRIFMH","ai.operation.name":"GET /default.aspx","ai.operation.id":"mHfOluFrMKQ="},"data":{"baseType":"RequestData","baseData":{"ver":2,"id":"mHfOluFrMKQ=","name":"GET /default.aspx","startTime":"2019-03-22T13:22:36.2582149+05:30","duration":"00:00:04.1154559","success":true,"responseCode":"200","url":"http://localhost:29989/default.aspx","httpMethod":"GET","properties":{"DeveloperMode":"true"}}}}
'iisexpress.exe' (CLR v4.0.30319: /LM/W3SVC/2/ROOT-1-131977147547841156): Loaded 'C:\Windows\Microsoft.Net\assembly\GAC_32\System.Transactions\v4.0_4.0.0.0__b77a5c561934e089\System.Transactions.dll'. Skipped loading symbols. Module is optimized and the debugger option 'Just My Code' is enabled.
The thread 0x332c has exited with code 0 (0x0)

“输出”窗口中的这些行都是完全正常的，可以忽略（不再使用的线程退出，不再使用错误代码0，遥测日志记录，程序集加载到IIS进程中。）

此后出现的特定错误是因为您试图多次托管WCF服务。这就是为什么它在您第一次加载页面时有效，但是在刷新页面后失败的原因（因为您已经重新配置并重新启动了该服务的另一个实例）。

尽管您的代码可以在控制台应用程序中运行，但是这不是在IIS中托管WCF服务的方式。在Microsoft Docs网站上，有此设置的详细演练：

Deploying an Internet Information Services-Hosted WCF Service

虽然完整的教程并不真正适合于Stack Overflow的答案，但我将引用一般步骤：

  
      

  • 确保正确安装并注册了IIS，ASP.NET，WCF和WCF激活组件。

    •   

  • 创建一个新的IIS应用程序，或重用现有的ASP.NET应用程序。

    •   

  • 为WCF服务创建一个.svc文件。

    •   

  • 将服务实现部署到IIS应用程序。

    •   

  • 配置WCF服务。

    •   

答案 1 :(得分：0)

正如Crowcoder和Josh Darnell所说，到那时我们需要创建WCF服务，并且可以将其托管在任何域上而不会引起端口问题

在我的Git存储库中，您还可以找到附带在服务器上发布的完整计算器代码。 GitHub Repo

您可以在命令提示符下通过以下方式禁用遥测服务

set DOTNET_CLI_TELEMETRY_OPTOUT=1
相关问题
最新问题