Asp core: IHostedService and IHttpClientFactory - best way? - asp.net-core

Question

I have asp core app. I use IHostedService for periodic task. I need send periodic http request. This is my code:
class MyService: IHostedService
{
private readonly IServiceScopeFactory _scopeFactory;
public MyService(IServiceScopeFactory scopeFactory)
{
_scopeFactory = scopeFactory;
}
private async void DoWork(object state)
{
using (var scope = _scopeFactory.CreateScope())
{
var clientFactory = scope.ServiceProvider.GetRequiredService<IHttpClientFactory>();
var request = new HttpRequestMessage(HttpMethod.Get,
"https://api.github.com/repos/aspnet/AspNetCore.Docs/branches");
request.Headers.Add("Accept", "application/vnd.github.v3+json");
request.Headers.Add("User-Agent", "HttpClientFactory-Sample");
var client = clientFactory.CreateClient();
var response = await client.SendAsync(request);
...
}
}
}
Also I added it in my Startup.cs
services.AddHttpClient();
This is working. But I'm not sure if this is the best performance solution. Any tips?

Answer 1

I am new to the asp core. This is an example that I found on the net. how do i do it right?
If you want to run background service to send the request in asp.net core, I suggest you could directly inject the httpClientFactory instead of using ServiceProvider.GetRequiredService to inject it again.
More details, you could refer to below codes:
Make sure you have add the AddHttpClient service into the startup.cs
services.AddHttpClient();
2.Add below codes into the worker.cs:
public class Worker : IHostedService
{
private IHttpClientFactory httpClientFactory;
public Worker(IHttpClientFactory _httpClientFactory) {
httpClientFactory = _httpClientFactory;
}
public Task StartAsync(CancellationToken cancellationToken)
{
DoWork("test");
return Task.CompletedTask;
}
public Task StopAsync(CancellationToken cancellationToken)
{
return Task.CompletedTask;
}
private async void DoWork(object state)
{
var request = new HttpRequestMessage(HttpMethod.Get, "http://localhost:9012/");
//request.Headers.Add("Accept", "application/vnd.github.v3+json");
//request.Headers.Add("User-Agent", "HttpClientFactory-Sample");
var client = httpClientFactory.CreateClient();
var response = await client.SendAsync(request);
int i = 0;
}
}
Result:
More details about how to use asp.net core background service, you could refer to this article.