StatusCode 401原因調用PostAsync WebRequest時未授權

Question

我是C＃HttpClient類的新手，希望你們可以幫助我解決我的問題。 嘗試調用PostAsync方法時，我收到StatusCode 401。 這是我的代碼

public WebClient(HttpClient httpClient)
    {
        string webHost = ConfigurationManager.AppSettings["webHost"];
        string webApiKey = ConfigurationManager.AppSettings["webApikey"];

        _httpClient = httpClient;
        _httpClient.BaseAddress = new Uri(webHost);
        _httpClient.DefaultRequestHeaders.Accept.Clear();
        _httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/xml"));

        _httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("x-coupa-api-key", "=" + ConfigurationManager.AppSettings["coupaApikey"]);
        System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
    }

public Tuple<bool, Task<HttpResponseMessage>> Comment(comment comment)
    {
        try
        {
            string commentUrl = string.Format("{0}api/comments/", _webHost);
            var responseMessage = _httpClient.PostAsync(commentUrl, CreateHttpContent(comment));
            Log.Error("Response message: " + responseMessage.Result);
            return new Tuple<bool, Task<HttpResponseMessage>>(responseMessage.Result.IsSuccessStatusCode, responseMessage);

        }
        catch (Exception ex)
        {
            Log.Error("Call to Web failed.", ex);
            throw;
        }

    }

private static HttpContent CreateHttpContent(comment data)
    {
        var format = "application/xml";

        return new StringContent(Common.SerializeUtf8(data), Encoding.UTF8, format);
    }

因此，我將帶有POST的xml發送到Web主機-我從PostAsync得到以下結果：

回應訊息：

StatusCode: 401, ReasonPhrase: 'Unauthorized', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:
{
  Transfer-Encoding: chunked
  Status: 401 Unauthorized
  X-Frame-Options: SAMEORIGIN
  X-XSS-Protection: 1; mode=block
  X-Content-Type-Options: nosniff
  X-Request-Id: 53e17930-f9fe-4ec4-ae5b-b772ce5f308e
  X-Runtime: 0.025822
  Cache-Control: no-cache
  Date: Wed, 26 Apr 2017 06:07:39 GMT
  Content-Type: text/html
}

Answer 1

找到了解決方案。 不應該使用授權，只需“添加標頭”即可：

_httpClient.DefaultRequestHeaders.Add("x-coupa-api-key", ConfigurationManager.AppSettings["webApikey"]);