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我试图弄清楚如何在 .NET 框架中执行之前拦截 GET 调用。

我创建了 2 个应用程序：一个前端（调用 API 并用它发送自定义 HTTP 标头）和一个后端 API：

前端调用API的方法：

[HttpGet]
    public async Task<ActionResult> getCall()
    {
        string url = "http://localhost:54857/";
        string customerApi = "2";

        using (var client = new HttpClient())
        {
            //get logged in userID
            HttpContext context = System.Web.HttpContext.Current;
            string sessionID = context.Session["userID"].ToString();

            //Create request and add headers
            client.BaseAddress = new Uri(url);
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            //Custom header
            client.DefaultRequestHeaders.Add("loggedInUser", sessionID);

            //Response
            HttpResponseMessage response = await client.GetAsync(customerApi);
            if (response.IsSuccessStatusCode)
            {
                string jsondata = await response.Content.ReadAsStringAsync();
                return Content(jsondata, "application/json"); …