Question

我有一个基于ServiceStack.Core（v1.0.44）的自托管应用程序，来自ServiceStack.Kestrel（v1.0.44）的ServiceStack.AppSelfHostBase内部依赖于Kestrel http服务器来提供请求

该应用程序在我的本地计算机上正常运行。但是当我们的构建服务器编译和部署它时，它会返回一个模糊的HTTP 500错误。

经过几个小时的调查，我发现原因是装配重定向。由于ServiceStack延迟加载AspNetCore和其他程序集，因此启动时不会生成错误。并且在我尝试加载某个程序集时，在我的代码执行之前发生了HTTP 500错误。根本没有日志。

我的快速解决方法是在app.config文件的assemblyBinding部分中包含所有已签名的程序集。

    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
  <dependentAssembly>
    <assemblyIdentity name="EntityFramework" publicKeyToken="b77a5c561934e089" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="6.0.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="EntityFramework.SqlServer" publicKeyToken="b77a5c561934e089" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="6.0.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="log4net" publicKeyToken="1b44e1d426115821" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="1.2.10.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Authentication.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Authentication.Core" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Diagnostics.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Diagnostics" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Hosting.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Hosting" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Hosting.Server.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Hosting.WindowsServices" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Http.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Http" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Http.Extensions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Http.Features" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.HttpOverrides" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Routing.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Routing" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Server.IISIntegration" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Server.Kestrel.Core" publicKeyToken="adb9793829ddae60" culture="neutral" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Server.Kestrel" publicKeyToken="adb9793829ddae60" culture="neutral" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Server.Kestrel.Https" publicKeyToken="adb9793829ddae60" culture="neutral" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.AspNetCore.Server.Kestrel.Transport.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
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  <dependentAssembly>
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration.Binder" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.0.0" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration.CommandLine" publicKeyToken="adb9793829ddae60" culture="neutral" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration.EnvironmentVariables" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration.FileExtensions" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.0.0" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration.Json" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.0.0" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.Configuration.UserSecrets" publicKeyToken="adb9793829ddae60" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="2.0.0.0" />
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.DependencyInjection.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
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  <dependentAssembly>
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  <dependentAssembly>
    <assemblyIdentity name="Microsoft.Extensions.FileProviders.Abstractions" publicKeyToken="adb9793829ddae60" culture="neutral" />
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    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Security.Cryptography.Primitives" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.0.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Security.Cryptography.X509Certificates" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.1.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Security.Principal.Windows" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.1.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Text.Encodings.Web" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.0.2.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Text.RegularExpressions" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.1.0.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Threading.Tasks.Extensions" publicKeyToken="cc7b13ffcd2ddd51" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.1.1.0" />
  </dependentAssembly>
  <dependentAssembly>
    <assemblyIdentity name="System.Xml.ReaderWriter" publicKeyToken="b03f5f7f11d50a3a" culture="neutral" />
    <bindingRedirect oldVersion="0.0.0.0-999.9.9.9" newVersion="4.1.0.0" />
  </dependentAssembly>
</assemblyBinding>

添加所有程序集的重定向后，问题就解决了。但我仍然不知道哪些组件导致了这个错误。 我的问题是：如果在延迟加载程序集时，如何在ServiceStack中捕获此类错误？

Answer 1

ServiceStack不进行任何延迟加载，.NET自然只会在运行使用这些依赖项的代码时加载依赖项。如果您在AppHost Configure()中使用依赖项，它将强制它们在Startup上使用，因此您可以执行诸如解析服务和执行测试请求之类的操作，例如：

using (var service = container.TryResolve<MyServices>())
{
    var response = service.Any(new MyRequest());
}

ServiceStack从Kestrel捕获HTTP 500内部错误？

1 个答案: