Question

我有一个带有startup.cs服务的asp.net core 2.2项目，该服务执行异步REST GET调用返回到我的当前站点，然后将结果（使用DI的View Component）返回到razor视图。

在服务中，我想调用“ / api / sessions”而不是“ http://localhost:3433/api/sessions”。我知道如果我在剃刀页面中可以使用〜ta帮助程序来获取Web服务器的基本路径，但是如何从服务中获取它呢？

这是我的服务和相关代码。

发件人：SessionsService.cs（这是我不想要的http://localhost，而只是〜/

公共课 { public int ID {get;组; } 公共字符串Title {get;组; } 公共字符串说明{组; } }

public class SessionsService : ISessionsService
{
    public async Task<List<Session>> GetSessions(int speakerId)
    {
        var uri = new Uri("http://localhost:50463/api/sessions");
        var httpClient = new HttpClient();
        var result = await httpClient.GetStringAsync(uri);
        var sessions = JsonConvert.DeserializeObject<List<Session>>(result);
        return sessions;
    }

}

来自：startup.cs

public void ConfigureServices(IServiceCollection services)
{
  services.AddTransient<ISessionsService, SessionsService>();

来自：index.cshtml

<vc:speaker-card speaker="@speaker" ></vc:speaker-card>

来自：SpeakerCardViewComponent.cs

{
    private ISessionsService _sessionsService;

    public SpeakerCardViewComponent(ISessionsService sessionsService)
    {
        _sessionsService = sessionsService;
    }

    public async Task<IViewComponentResult> InvokeAsync(
        Speaker speaker)
    {
        var sessions = await _sessionsService.GetSessions(101);
        speaker.Sessions = sessions;
        return View(speaker);
    }
}

柯基·拉金（Kirk larkin）建议的答案：

   public async Task<List<Session>> GetSessions(int speakerId,string baseUrl)
    {

        var uri = new Uri($"{baseUrl}api/sessions");
        var httpClient = new HttpClient();
        var result = await httpClient.GetStringAsync(uri);
        var sessions = JsonConvert.DeserializeObject<List<Session>>(result);
        return sessions;
    }


    public void ConfigureServices(IServiceCollection services)
    {
        services.AddTransient<ISessionsService, SessionsService>();
        services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();



    public class SpeakerCardViewComponent : ViewComponent
    {
    private ISessionsService _sessionsService;
    private IHttpContextAccessor _httpContextAccessor;

    public SpeakerCardViewComponent(ISessionsService sessionsService, IHttpContextAccessor httpContextAccessor)
    {
        _sessionsService = sessionsService;
        _httpContextAccessor = httpContextAccessor;
    }

    public async Task<IViewComponentResult> InvokeAsync(
        Speaker speaker)
    {
        var isHttps = _httpContextAccessor.HttpContext.Request.IsHttps;
        var baseUrl = isHttps ? "https://" : "http://"
                                             + _httpContextAccessor.HttpContext.Request.Host.Value
                                             + "/";


        var sessions = await _sessionsService.GetSessions(speaker.SpeakerId, baseUrl);
        speaker.Sessions = sessions;
        return View(speaker);
    }
}

在ASP.NET Core 2.2中，如何在启动服务中获取基本URL

0 个答案: