首先跟著官網 step by step

https://docs.microsoft.com/en-us/aspnet/core/migration/21-to-22?view=aspnetcore-2.2&tabs=visual-studio

Bug 1

發現一個 odata routing issue

https://github.com/Microsoft/aspnet-api-versioning/issues/361

因為 2.2 router 有升級, 貌似 odata 沒有跟上.

https://blogs.msdn.microsoft.com/webdev/2018/08/27/asp-net-core-2-2-0-preview1-endpoint-routing/

目前只好先關上它

options.EnableEndpointRouting = false;

然後繼續追蹤

https://github.com/OData/WebApi/issues/1707

Bug 2

https://github.com/aspnet/AspNetCore/issues/6166

在做 webapi 又跨域的情況下, 遊覽器會發送 option request , 然而因為 2.2 有對 http2 之類的升級, 好像導致了 iis 的返回有點問題.

具體原因我就不管了. 反正就是用 work around 頂一頂先.

app.Use(async (ctx, next) =>
{
  
 
await next();
  if (ctx.Response.StatusCode == 204)
  {
    ctx.Response.ContentLength = 0;
  }
});

持續追蹤 https://github.com/aspnet/AspNetCore/issues/4398

Bug 3

serilog-extensions-logging-file 好像不能用了...雖然這東西本來就沒有維護了.

那就找替代吧.

https://andrewlock.net/creating-a-rolling-file-logging-provider-for-asp-net-core-2-0/

https://nblumhardt.com/2017/08/use-serilog/

https://github.com/serilog/serilog-settings-configuration

https://stackoverflow.com/questions/40880261/configuring-serilog-rollingfile-with-appsettings-json

https://nblumhardt.com/2016/03/reading-logger-configuration-from-appsettings-json/

https://github.com/serilog/serilog-aspnetcore

https://github.com/serilog/serilog-sinks-file

appsetting.json

  "Serilog": {
    "MinimumLevel": {
      "Default": "Information",
      "Override": {
        "Microsoft": "Information",
        "System": "Warning",
        "Hangfire": "Warning"
      }
    },
    "Enrich": [ "FromLogContext", "WithMachineName", "WithThreadId" ],
    "WriteTo": [
      { "Name": "Console" },
      {
        "Name": "File",
        "Args": {
          "path": "Log/log.txt",
          "rollingInterval": 3
        }
      }
    ]
  },

main.cs

public static void Main(string[] args)
{
    CurrentDirectoryHelpers.SetCurrentDirectory();
        var configuration = new ConfigurationBuilder()
        .SetBasePath(Directory.GetCurrentDirectory())
        .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
        .AddJsonFile($"appsettings.{Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT") ?? "Production"}.json", optional: true)
        .AddEnvironmentVariables()
        .Build();
            
    Log.Logger = new LoggerConfiguration()
        .ReadFrom.Configuration(configuration)
        .CreateLogger();

    WebHost.CreateDefaultBuilder(args)
        .UseUrls("http://192.168.1.152:61547")
        .ConfigureSecretFromCloud(skipInDevelopmentMode: true)
        .UseSerilog()
        .UseStartup<Startup>().Build().Run();
}

替代方案很簡單. 但是 2.2 有 bug !

https://github.com/aspnet/AspNetCore/issues/4206

因為 serilog 是在 main.cs 去獲取 appsetting.json 然後 setup config 的. 而 2.2 iis 情況下有一個叫 In-Progress 的鬼.

它會把 path 給弄不清楚. 幸好微軟團隊及時給了 work around 參考上面的 gitHub, 對話下方就有 word around 了.

Asp.net core 學習筆記 2.1 升級到 2.2