问ASP.NET核心OWIN中间件

EN

app.UseSiteThemer();

public static class SiteThemerExtensions
{
    public static IApplicationBuilder UseSiteThemer(this IApplicationBuilder builder)
    {
        return builder.UseMiddleware<SiteThemerMiddleware>();
    }
}

public class SiteThemerMiddleware
{
    private readonly RequestDelegate _next;
    private readonly ISiteService _siteService;

    public SiteThemerMiddleware(RequestDelegate next, ISiteService siteService)
    {
        _siteService = siteService;
        _next = next;
        //_logger = loggerFactory.CreateLogger<SiteThemerMiddleware>();
    }

    public async Task Invoke(HttpContext context)
    {
        await Task.Run(() =>
         {

             Console.Write("OWIN Hit");
         });


        //_logger.LogInformation("Handling request: " + context.Request.Path);
        await _next.Invoke(context);
        //_logger.LogInformation("Finished handling request.");
    }
}