c# - HttpClient在c#中将Host和UserAgent添加到请求中

Question

我必须在我的请求中添加主机和用户代理，但没有像“主机”或“用户代理”这样的功能

没有主机我没有授权..“WebException:远程服务器返回错误:(401) 未经授权。”我的代码:

var webRequest = WebRequest.Create(url) as HttpWebRequest;
            if (webRequest != null)
            {
                webRequest.Accept = "*/*";
                webRequest.UserAgent = ".NET";
                webRequest.Method = WebRequestMethods.Http.Post;
                webRequest.ContentType = "application/json";
                webRequest.Host = "coinbase.com";

                var whc = new WebHeaderCollection
                {
                    "ACCESS_KEY: " + API_KEY,
                    "ACCESS_SIGNATURE: " + signature,
                    "ACCESS_NONCE: " + nonce
                };
                webRequest.Headers = whc;

                using (WebResponse response = webRequest.GetResponse())
                {
                    using (Stream stream = response.GetResponseStream())
                    {
                        StreamReader reader = new StreamReader(stream);
                        returnData = reader.ReadToEnd();
                    }
                }
            }

我的代码屏幕: screen

Answer 1

用行“webRequest.Accept = "/";"等等 你实际上在 webRequest.Headers 集合中设置了值。然后用行“webRequest.Headers = whc;”你基本上覆盖了整个集合。您应该像这样添加自定义 header :

var webRequest = WebRequest.Create("http://google.com") as HttpWebRequest;
if (webRequest != null)
{
    webRequest.Accept = "*/*";
    webRequest.UserAgent = ".NET";
    webRequest.Method = WebRequestMethods.Http.Post;
    webRequest.ContentType = "application/json";
    webRequest.Host = "coinbase.com";

    webRequest.Headers.Add("ACCESS_KEY", API_KEY);
    webRequest.Headers.Add("ACCESS_SIGNATURE", signature);
    webRequest.Headers.Add("ACCESS_NONCE", nonce);

    //...
}

当我对此进行调试时，我在 webRequest.Headers 集合中看到了所有必需的 header ，但缺少主机。如果我添加它然后得到错误说明我应该使用“webRequest.Host”设置 header 而不是直接在 header 集合中。我不知道这是一个错误还是它应该像这样工作......也许这根本不会打扰你。