如何在Application Insights中扩展对传出http请求的依赖性跟踪

我想你要找的是 ITelemetryInitializer ,它可以为依赖项遥测添加自定义属性。

对于.net核心web项目,您可以参考 link .

我写了一个演示如下:

1.创建自定义ITelemetryInitializer类以收集任何依赖关系数据:

    public class MyTelemetryInitializer: ITelemetryInitializer
    {
        IHttpContextAccessor httpContextAccessor;

        public MyTelemetryInitializer(IHttpContextAccessor httpContextAccessor)
        {
            this.httpContextAccessor = httpContextAccessor;
        }

        public void Initialize(ITelemetry telemetry)
        {
            //only add custom property to dependency type, otherwise just return.
            var dependencyTelemetry = telemetry as DependencyTelemetry;
            if (dependencyTelemetry == null) return;

            if (!dependencyTelemetry.Context.Properties.ContainsKey("custom_dependency_headers_1"))
            {
                //the comment out code use to check the fields in Headers if you don't know
                //var s = httpContextAccessor.HttpContext.Request.Headers;
                //foreach (var s2 in s)
                //{
                //   var a1 = s2.Key;
                //    var a2 = s2.Value;
                //}

                dependencyTelemetry.Context.Properties["custom_dependency_headers_1"] = httpContextAccessor.HttpContext.Request.Headers["Connection"].ToString();
            }
        }

    }

2.然后在Startup.cs->ConfigureServices方法中:

public void ConfigureServices(IServiceCollection services)
{
//other code

//add this line of code here
services.AddSingleton<ITelemetryInitializer, MyTelemetryInitializer>();
}

3.测试结果,检查是否已将自定义属性添加到azure门户->自定义属性: