.NET Core3DockerProject在失败前生成太多307次重定向

Question

当启动部署到灵活的应用程序时，它会失败，太多307次重定向。它在VS中在本地成功运行。

开发和计算堆栈包括：

• MacOS
• .NET Core 3
• Visual 2019用于Mac
• Docker
• Google应用程序引擎

我使用VS模板创建了一个项目(天气预报)。

• Create API项目
• 添加码头支持(通过菜单)
• 创建和导出SSL证书：

dotnet dev-certs https -v -ep /Users/QQQQQQQ/Projects/CostZzzzzzzzzz/xxxxx.Orchestration.Cost/Certificate/dev-certificate.pfx -p ufo

(我随后将其移至项目的根)

• 修改Dockerfile如下：

    FROM mcr.microsoft.com/dotnet/core/aspnet:3.0-buster-slim AS base
    WORKDIR /app
    EXPOSE 80
    EXPOSE 443
    EXPOSE 8080

    FROM mcr.microsoft.com/dotnet/core/sdk:3.0-buster AS build
    WORKDIR /src
    COPY Xxxxx.Orchestration.Cost/Xxxxx.Orchestration.Cost.csproj Xxxxx.Orchestration.Cost/
    RUN dotnet restore "Xxxxx.Orchestration.Cost/Xxxxx.Orchestration.Cost.csproj"
    COPY . .
    WORKDIR "/src/Xxxxx.Orchestration.Cost"
    RUN dotnet build "Xxxxx.Orchestration.Cost.csproj" -c Release -o /app/build

    FROM build AS publish
    RUN dotnet publish "Xxxxx.Orchestration.Cost.csproj" -c Release -o /app/publish

    FROM base AS final
    WORKDIR /app
    COPY --from=publish /app/publish .
    ENV ASPNETCORE_ENVIRONMENT=Development
    ENV ASPNETCORE_URLS=http://*:8080;https://*:443
    ENV ASPNETCORE_HTTPS_PORT=443
    ENV ASPNETCORE_Kestrel__Certificates__Default__Path=Xxxxx.Orchestration.Cost/dev-certificate.pfx
    ENV ASPNETCORE_Kestrel__Certificates__Default__Password=ufo
    ENTRYPOINT ["dotnet", "Xxxxx.Orchestration.Cost.dll"]

• 创建app.yaml

    runtime: custom
    env: flex

    # This sample incurs costs to run on the App Engine flexible environment.
    # The settings below are to reduce costs during testing and are not appropriate
    # for production use. For more information, see:
    # https://cloud.google.com/appengine/docs/flexible/python/configuring-your-app-with-app-yaml
    manual_scaling:
      instances: 1
    resources:
      cpu: 1
      memory_gb: 0.5
      disk_size_gb: 10

    network:
        name: default
        subnetwork_name: default-us-east1

    service: get-cost

    env_variables:
      # The __ in My__Greeting will be translated to a : by ASP.NET.
      My__Greeting: Hello AppEngine Flex!

• 修改Program.cs以支持kestrel和ssl

     public class Program
    {
        public static void Main(string[] args)
        {
            //CreateHostBuilder(args).Build().Run();
            CreateWebHostBuilder(args).Build().Run();

        }

        public static IHostBuilder CreateHostBuilder(string[] args) =>
            Host.CreateDefaultBuilder(args)
                .ConfigureWebHostDefaults(webBuilder =>
                {
                    webBuilder.UseStartup<Startup>();
                });

        public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
            WebHost.CreateDefaultBuilder(args)
            .UseKestrel(options =>
             {
                 //     //options.Listen(IPAddress.Loopback, 5000);  // http:localhost:5000
                 options.Listen(IPAddress.Any, 8080);         // http:*:80
                 options.Listen(IPAddress.Any, 443, listenOptions =>
                    {
                        listenOptions.UseHttps("dev-certificate.pfx", "ufo");
                    });

             })
            .UseStartup<Startup>();
    }

• 部署服务到GAE: gcloud应用程序部署

此解决方案是描述如何通过Docker创建.NET核心应用程序并将其部署到GAE的几篇文章的合并。

错误日志的主要消息是: XXX.YYY.ZZZ.AAA - "GET /“307未定义的"Mozilla/5.0 (Macintosh；Intel 10_14_6) AppleWebKit/537.36 (KHTML，类似壁虎) Chrome/78.0.3904.108 Safari/537.36”

我正在寻找有关如何正确配置应用程序以便它将在GAE中正确运行的帮助。

PS:通过删除Dockerfile中的ENV指令，码头容器将在我的mac上本地运行。然而，我无法在GAE上运行它。

Answer 1

事实证明，一旦我理解了真正的问题是什么，这个解决方案就非常简单，部分原因在于对较新的.net核心版本(如3.x、GAE和Docker都是新的)来说，这些问题都是非常新的。

无论如何，删除app.UseHttpsRedirection()；在Startup.cs类的配置方法中解决了眼前的问题。本文解释了这个问题：https://learn.microsoft.com/en-us/aspnet/core/security/enforcing-ssl?view=aspnetcore-3.1&tabs=visual-studio

实际上，GAE Flex已经在端口8080上提供重定向，因此代码中的附加重定向指令会导致HTTP 307结果的无穷无尽的重定向。