在C#中从rest服务获取文件后以actionResult格式显示

using System;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web.Mvc;

public class HomeController : Controller
{
    public async Task<ActionResult> GetFileFromRestService()
    {
        string restServiceUrl = "http://example.com/api/file"; // 替换为实际的REST服务URL

        using (HttpClient client = new HttpClient())
        {
            HttpResponseMessage response = await client.GetAsync(restServiceUrl);

            if (response.IsSuccessStatusCode)
            {
                byte[] fileBytes = await response.Content.ReadAsByteArrayAsync();
                string fileName = "example.txt"; // 替换为实际的文件名

                // 返回文件内容
                return File(fileBytes, "application/octet-stream", fileName);
            }
            else
            {
                // 处理请求失败的情况
                return Content("Failed to retrieve file from REST service.");
            }
        }
    }
}