如何解决如何使用IHttpClientFactory在Blazor Server中配置HttpClient基址
我正在尝试使用HttpClient
在Blazor
服务器中配置IHttpClientFactory
的基地址,但遇到运行时异常:
services.AddHttpClient("ApiClient",(provider,client) =>
{
var uriHelper = provider.GetRequiredService<NavigationManager>();
client.BaseAddress = new Uri(uriHelper.BaseUri);
});
System.InvalidOperationException: 'Cannot resolve scoped service 'Microsoft.AspNetCore.Components.NavigationManager' from root provider.'
有人知道这里可能是什么问题吗?
解决方法
在ConfigureServices
期间基本URL不可用,您可以传递它或创建服务:
services.AddHttpClient();
services.AddTransient<ApiService>();
服务:
public class ApiService
{
public ApiService(HttpClient httpClient,NavigationManager navigationManager)
{
HttpClient = httpClient;
NavigationManager = navigationManager;
HttpClient.BaseAddress = new Uri(NavigationManager.BaseUri);
}
public HttpClient HttpClient { get; }
public NavigationManager NavigationManager { get; }
}
一个组件:
Base Address : @ApiService.HttpClient.BaseAddress
@code {
[Inject]
public ApiService ApiService { get; set; }
}
,
将此添加到服务中
var baseAddress = "http://address-goes-here/";
services.AddScoped(sp =>
{
var client = new HttpClient();
client.BaseAddress = new Uri(baseAddress);
return client;
});
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。