IHttpClientFactory与更改HttpClient

Question

更改IHttpClientFactory的底层IHttpClientFactory的最佳实践是什么？

下面是我如何创建依赖项注入：

IServiceCollection serColl = new ServiceCollection();

serColl.AddHttpClient("tester").ConfigurePrimaryHttpMessageHandler(() =>
{
    return new HttpClientHandler()
    {
        CookieContainer = Cookies,
    };
});

var serviceProvider = serColl.BuildServiceProvider();

_HTTPClientFactory = serviceProvider.GetService<IHttpClientFactory>();

在本例中，Cookies持有许多System.Net.Cookies。我的问题是，如果我需要改变饼干，我应该怎么做呢？

Answer 1

我是怎么解决这个问题的。

IServiceCollection serColl = new ServiceCollection();
serColl.AddTransient<CookieHandler>();
serColl.AddHttpClient("IHTTPRequester");
serColl.AddHttpClient("HTTPCookieClient").AddHttpMessageHandler<CookieHandler>();
var serviceProvider = serColl.BuildServiceProvider();
_HTTPClientFactory = serviceProvider.GetService<IHttpClientFactory>();

然后，由于HTTPCookieClient有一个委托处理程序，所以我有以下内容

public class CookieHandler : DelegatingHandler
{
    //Everytime a client call the getasync then this is called and we then add the Cookie header to the call.
    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request,
        CancellationToken cancellationToken)
    {
        request.Headers.Add("Cookie", Your Cookie Values go here);
        
        var response = await base.SendAsync(request, cancellationToken);
        return response;
    }
}