无法解析 'Serilog 的服务。Extensions.Hosting.DiagnosticContext' 尝试激活'Serilog.AspNetCore.RequestLoggingMid

Question

当我想使用自定义SerilogRequestLogging作为中间件时，我得到以下例外:

系统。InvalidOperationException:无法解析服务类型"Serilog.Extensions.Hosting。诊断上下文'，试图激活"Serilog.AspNetCore.RequestLoggingMiddleware"。

My Custom SerilogRequestLogging in external Library:

public static IApplicationBuilder UseCustomSerilogRequestLogging(this IApplicationBuilder app)
{
return app.UseSerilogRequestLogging(options =>
{
options.EnrichDiagnosticContext = (diagnosticContext, httpContext) =>
{
diagnosticContext.Set("RequestHost", httpContext.Request.Host.Value);
diagnosticContext.Set("RequestScheme", httpContext.Request.Scheme);
diagnosticContext.Set("RequestMethod", httpContext.Request.Method);
diagnosticContext.Set("RequestProtocol", httpContext.Request.Protocol);
diagnosticContext.Set("RequestPath", httpContext.Request.Path);
diagnosticContext.Set("RequestRemoteAddress", httpContext.Connection.RemoteIpAddress);
};
});
}

---

然后我将其作为中间件添加到Configure方法中，如下所示:

app.UseCustomSerilogRequestLogging();

在program.cs:

---

public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseSerilog((provider, context, loggerConfig) =>
{
loggerConfig.Configure(provider, Configuration);
});
webBuilder.UseStartup<Startup>();
});

---

外部库的扩展方法:

public static void Configure(this LoggerConfiguration loggerConfig,
IServiceProvider provider, IConfiguration config)
{
var sqlserverConnectionString = config["ConnectionStrings:S1"];
var sqlserverLogTable = config["Logging:S2"];
var rollingFileName = config["Logging:S3"];
//SQL CONFIGURATION HERE TO REDUCE THE NUMBER OF LINES...
loggerConfig
.ReadFrom.Configuration(config)
.Enrich.FromLogContext()
.Enrich.WithMachineName()
.Enrich.WithAssemblyName()
.Enrich.WithAssemblyVersion()
.WriteTo.File(rollingFileName, restrictedToMinimumLevel: LogEventLevel.Verbose)
.WriteTo.Seq(seqAddress)
.WriteTo.MSSqlServer(
connectionString: sqlserverConnectionString,
sinkOptions: sinkOpts,
columnOptions: columnOpts
);
}

Answer 1

正如评论中提到的，当前显示的示例并没有显示您将.UseSerilog()与主主机构建器一起使用。虽然您可能已经添加到web默认构建器中，但基于异常，它没有添加到服务集合中，这是在最终构建主机时解决依赖关系的方法。

public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.UseSerilog() //<-- THIS WAS MISSING HERE
.ConfigureWebHostDefaults(webBuilder => {
webBuilder.UseSerilog((provider, context, loggerConfig) => {
loggerConfig.Configure(provider, Configuration);
});
webBuilder.UseStartup<Startup>();
});

其他内容保持不变。

参考Serilog.Extensions.Hosting