远程服务器返回错误：（401）未经授权

Question

我正在尝试使用此代码

从windows live connect api获取访问令牌

string requestUrl =“https://consent.live.com/AccessToken.aspx”;

        // Request the access token.
        string postData = string.Format("{0}?wrap_client_id={1}&wrap_client_secret={2}&wrap_callback={3}&wrap_verification_code={4}&idtype={5}",
                requestUrl,
               "000000004C039809",
                "l4VJekL1vFL1iFVmcP5qLkWv9ukY4mdl",
                "http://ewshops.com",
                "dac5d71d-d640-30d1-ebed-3576b132b3ec",
                "cid");
        byte[] postDataEncoded = System.Text.Encoding.UTF8.GetBytes(postData);

        WebRequest req = HttpWebRequest.Create(requestUrl);
        req.Method = "POST";
       // req.
        req.ContentType = "application/x-www-form-urlencoded";
        req.ContentLength = postDataEncoded.Length;


        Stream requestStream = req.GetRequestStream();
        requestStream.Write(postDataEncoded, 0, postDataEncoded.Length);

        WebResponse res = req.GetResponse();

        string responseBody = null;

        using (StreamReader sr = new StreamReader(res.GetResponseStream(), Encoding.UTF8))
        {
            responseBody = sr.ReadToEnd();
        }

        // Process FORM POST.
        NameValueCollection responseCollection = System.Web.HttpUtility.ParseQueryString(responseBody);

        return responseCollection["wrap_access_token"];

但我收到了以下错误

远程服务器返回错误：（401）未经授权。

Answer 1

向我们展示响应主体，它通常包含更多信息。在将其添加到uri之前，您还应该对其进行urlencode http://ewshops.com。

Answer 2

我遇到了同样的问题并修复如下。删除requestUrl（“https://consent.live.com/AccessToken.aspx”）和随后的“？”来自你的postData。 POST数据应采用x-www-form-urlencoded格式，不包括请求URL。还有HttpUtility.UrlEncode（）所有参数。