用于记录dotnet核心webapi的扩展方法如何获取调用项目/程序集名称？

Question

这是扩展方法

public static IApplicationBuilder UseLoggerConfig(this IApplicationBuilder app)
{
    //add serilog https://github.com/serilog/serilog-extensions-logging
    // https://github.com/serilog/serilog-extensions-logging/blob/dev/samples/Sample/Program.cs
    Log.Logger = new LoggerConfiguration()
    .Enrich.FromLogContext()
    .WriteTo.File("log.txt", rollingInterval: RollingInterval.Day)
    .CreateLogger();

    var startTime = DateTimeOffset.UtcNow;

    Log.Logger.Information("Started at {StartTime} and 0x{Hello:X} is hex of 42", startTime, 42);

    return app;
}

我们可以像Startup一样使用它

app.UseLoggerConfig();

我想保存\\%windir%\log\callingAppName\logfile.log上的日志。

有什么想法我们怎么做到这一点？

Answer 1

我想你可以检查hosting environment这样的信息。

IHostingEnvironment.ApplicationName

获取或设置应用程序的名称。该属性由主机自动设置为包含应用程序入口点的程序集。

强调我的

鉴于这是为了共享，应该从它被使用/调用的位置明确注入。即运行应用程序的Web托管环境。

public static IApplicationBuilder UseLoggerConfig(this IApplicationBuilder app, IHostingEnvironment env) {

    var callingAppName = env.ApplicationName;

    var path = $"{callingAppName}/logfile.log";

    //add serilog https://github.com/serilog/serilog-extensions-logging
    // https://github.com/serilog/serilog-extensions-logging/blob/dev/samples/Sample/Program.cs
    Log.Logger = new LoggerConfiguration()
    .Enrich.FromLogContext()
    .WriteTo.File(path, rollingInterval: RollingInterval.Day)
    .CreateLogger();

    var startTime = DateTimeOffset.UtcNow;

    Log.Logger.Information("Started at {StartTime} and 0x{Hello:X} is hex of 42", startTime, 42);

    return app;
}

我们可以像Startup一样使用它

public void Configure(IApplicationBuilder app, IHostingEnvironment env) {

    //...code removed for brevity

    app.UseLoggerConfig(env);
}

这还允许更改基于日志位置的环境类型，如开发，登台，生产等。

public static IApplicationBuilder UseLoggerConfig(this IApplicationBuilder app, IHostingEnvironment env) {

    var callingAppName = env.ApplicationName;

    var path = $"{callingAppName}/logfile.log";
    if (env.IsDevelopment()) {
        // In Development logging path
    } else {
        // In Staging/Production logging path
    }

    //add serilog https://github.com/serilog/serilog-extensions-logging
    // https://github.com/serilog/serilog-extensions-logging/blob/dev/samples/Sample/Program.cs
    Log.Logger = new LoggerConfiguration()
    .Enrich.FromLogContext()
    .WriteTo.File(path, rollingInterval: RollingInterval.Day)
    .CreateLogger();

    var startTime = DateTimeOffset.UtcNow;

    Log.Logger.Information("Started at {StartTime} and 0x{Hello:X} is hex of 42", startTime, 42);

    return app;
}