.net-core - 错误 UseHealthChecksUI 遇到意外字符

Question

我正在尝试实现 ASP.NET Core 2.2 运行状况检查功能。设置健康检查本身不是问题，但我还希望能够在其他项目中使用 UI 功能来监控我所有的 api。现在我收到异常消息

解析值时遇到意外字符:<.

我做错了什么？

API 项目:

var healthCheckOptions = new HealthCheckOptions
{
Predicate = _ => true,
ResponseWriter = async (c, r) =>
{
    c.Response.ContentType = MediaTypeNames.Application.Json;
    var result = JsonConvert.SerializeObject(
        new
        {
            Checks = r.Entries.Select(e =>
                new
                {
                    Description = e.Key,
                    Status = e.Value.Status.ToString(),
                    ResponseTime = e.Value.Duration.TotalMilliseconds
                }),
            TotalResponseTime = r.TotalDuration.TotalMilliseconds
        });
    await c.Response.WriteAsync(result);
 }
};

app.UseHealthChecks("/live", new HealthCheckOptions
{
  Predicate = _ => true
});
app.UseHealthChecks("/hc", healthCheckOptions);
app.UseHealthChecksUI(options => options.UIPath = "/healtcheck");

// Registers required services for health checks
services
   .AddHealthChecks()
   .AddCheck("self", () => HealthCheckResult.Healthy())
   .AddCheck("ComunContext Database", new   SqlServerHealthCheck(configuration["ConnectionStrings:ComunContext"]));

网络项目:

services.AddHealthChecksUI();

app.UseHealthChecksUI(config =>
{
    config.UIPath = "/healthcheck";
});

appsettings.json
{
  "HealthChecks-UI": {
  "HealthChecks": [
  {
    "Name": "Local",
    "Uri": "http://localhost:27365/hc"
  }
],
"EvaluationTimeOnSeconds": 10,
"MinimumSecondsBetweenFailureNotifications": 60
 }
}

Answer 1

尝试添加一个 ResponseWriter:

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{      
    app.UseHealthChecks("/healthchecks", new HealthCheckOptions
    {
        ResponseWriter = async (context, report) =>
        {
            context.Response.ContentType = "application/json; charset=utf-8";
            var bytes = Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(report));
            await context.Response.Body.WriteAsync(bytes);
        }
    });
    app.UseHealthChecksUI();
}