鉴于以下类：
public class HttpHelper
{
private readonly HttpClient client;
public HttpHelper(HttpClient client)
{
this.client = client;
}
}
public class ServiceA
{
private readonly HttpHelper helper;
public ServiceA(HttpHelper helper)
{
this.helper = helper;
}
}
public class ServiceB
{
private readonly HttpHelper helper;
public ServiceB(HttpHelper helper)
{
this.helper = helper;
}
}
和以下设置：
sc.AddSingleton<ServiceA>()
.AddHttpClient<HttpHelper>()
.ConfigureHttpClient((sp, client) => { client.BaseAddress = new Uri("http://domainA"); });
sc.AddSingleton<ServiceB>()
.AddHttpClient<HttpHelper>()
.ConfigureHttpClient((sp, client) => { client.BaseAddress = new Uri("http://domainB"); });
当我尝试解析ServiceA和ServiceB时，它们都得到一个具有相同URL的HttpClient。
我如何更改DI中的注册，使每个服务都得到正确的HttpClient注入？
TIA
/Søren
我宁愿做这样的事。
public class ServiceA
{
private readonly HttpClient httpClient;
public ServiceA(HttpClient httpClient)
{
this.httpClient = httpClient;
}
}
public class ServiceB
{
private readonly HttpClient httpClient;
public ServiceB(HttpClient httpClient)
{
this.httpClient = httpClient;
}
}
和ConfigureService。
services.AddHttpClient<ServiceA>().ConfigureHttpClient(client =>
{
client.BaseAddress = new Uri("http://domainA");
});
services.AddHttpClient<ServiceB>().ConfigureHttpClient(client =>
{
client.BaseAddress = new Uri("http://domainB");
});
注：
在你的情况下，有两件事是有问题的。
另一种方法是按命名工厂进行配置：
//configure your clients
services.AddHttpClient("clientName1", client => {
//configure
});
services.AddHttpClient("clientName2", client => {
//configure
});
//configure your services
services.AddScoped<ServiceA>(sp =>
{
var client = sp.GetRequiredService<IHttpClientFactory>()
.CreateClient("clientName1");
return new ServiceA(client);
});
services.AddScoped<ServiceB>(sp =>
{
var client = sp.GetRequiredService<IHttpClientFactory>()
.CreateClient("clientName2");
return new ServiceB(client);
});
这种方法的一个问题是，您需要明确定义服务A和B的解析器。
