Visual Studio 2019 IIS 配置文件创建 web.config 破坏 Azure 应用服务的文件

Question

在 ASP.NET 核心 Web 3.1 项目上使用 Microsoft Visual Studio Community 2019 版本 16.6.3 创建新的调试配置文件时，会创建一个 web.config 文件。

文件如下所示：

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <location path="." inheritInChildApplications="false">
    <system.webServer>
      <handlers>
        <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModuleV2" resourceType="Unspecified" />
      </handlers>
      <aspNetCore processPath="C:\Users\<USER>\Source\Project\Project.Web\bin\Debug\netcoreapp3.1\Project.Web.exe" arguments="" stdoutLogEnabled="false" hostingModel="InProcess">
        <environmentVariables>
          <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="Development" />
        </environmentVariables>
      </aspNetCore>
    </system.webServer>
  </location>
</configuration>

使用 web.config 访问站点时出现错误：

AggregateException: One or more errors occurred. (One or more errors occurred. (The NPM script 'start' exited without indicating that the create-react-app server was listening for requests. The error output was: )) System.Threading.Tasks.Task.ThrowIfExceptional(bool includeTaskCanceledExceptions)

InvalidOperationException: The NPM script 'start' exited without indicating that the create-react-app server was listening for requests. The error output was: Microsoft.AspNetCore.SpaServices.ReactDevelopmentServer.ReactDevelopmentServerMiddleware.StartCreateReactAppServerAsync(string sourcePath, string npmScriptName, ILogger logger)

Answer 1

我一开始以为 aspNetCore processPath 是罪魁祸首，但考虑到这个错误，它看起来更像是来自 Startup.cs.

的代码

if (env.IsDevelopment())
{
    spa.UseReactDevelopmentServer(npmScript: "start");
}

查看实际部署的文件证实了我的怀疑，这里的路径是相对的。

我需要将 ASPNETCORE_ENVIRONMENT 设置为 Production。通过创建一个新的 web.release.config 文件解决了这个问题，因为我需要在 ASPNETCORE_ENVIRONMENT 作为 Development 的实际 IIS 上测试应用程序。通过此转换，一切正常：

<?xml version="1.0" encoding="utf-8"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">

  <!-- To customize the asp.net core module uncomment and edit the following section. 
  For more info see https://go.microsoft.com/fwlink/?linkid=838655 -->
  <!--
  <system.webServer>
    <handlers>
      <remove name="aspNetCore"/>
      <add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
    </handlers>
    <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" />
  </system.webServer>
  -->

  <location>
    <system.webServer>
      <aspNetCore>
        <environmentVariables>
          <environmentVariable name="ASPNETCORE_ENVIRONMENT" value="Production" xdt:Locator="Match(name)" xdt:Transform="SetAttributes" />
        </environmentVariables>
      </aspNetCore>
    </system.webServer>
  </location>

</configuration>

来源：

Visual Studio 2019 IIS 配置文件创建 web.config 破坏 Azure 应用服务的文件

Visual Studio 2019 IIS profile creates web.config file that breaks Azure App Service

c#

web-config

azure

asp.net-core