Question

我在异步地从Twitter获取请求令牌时遇到问题 - 服务器返回＆＃34;远程服务器返回错误：（401）未经授权。＆＃34;

这是我使用的代码 -

public void AcquireRequestToken(Action<bool> response)
{

    string oauth_nonce = Convert.ToBase64String(new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));

    // build the signature
    var headers = new Dictionary<string,string>()
    {
        { "oauth_consumer_key", _oAuthConfig.ConsumerKey },
        { "oauth_nonce", oauth_nonce },
        { "oauth_signature_method", "HMAC-SHA1" },
        { "oauth_timestamp", MakeTimestamp() },
        { "oauth_version", "1.0" },
        { "oauth_callback", PercentEncode(_oAuthConfig.Callback) },
    };

    string signature = MakeSignature ("POST", _oAuthConfig.RequestTokenUrl, headers);
    string compositeSigningKey = MakeSigningKey(_oAuthConfig.ConsumerSecret, null);
    string oauth_signature = MakeOAuthSignature(compositeSigningKey, signature);

    Uri fullUri = new Uri(_oAuthConfig.RequestTokenUrl);

    var request = (HttpWebRequest)WebRequest.Create(fullUri);
    request.Method = "POST";

    request.Headers.Add("oauth_consumer_key", PercentEncode(_oAuthConfig.ConsumerKey));
    request.Headers.Add("oauth_nonce", PercentEncode(oauth_nonce));
    request.Headers.Add("oauth_signature_method", PercentEncode("HMAC-SHA1"));
    request.Headers.Add("oauth_timestamp", PercentEncode(MakeTimestamp()));
    request.Headers.Add("oauth_version", "1.0");
    request.Headers.Add("oauth_callback", PercentEncode(_oAuthConfig.Callback));
    request.Headers.Add("oauth_signature", PercentEncode(oauth_signature));

    try 
    {

        request.BeginGetResponse(new AsyncCallback(result =>
        {
            string contents = String.Empty;
            HttpWebRequest theRequest = (HttpWebRequest)result.AsyncState;

            if (theRequest != null)
            {
                try
                {
                    HttpWebResponse theResponse = (HttpWebResponse)theRequest.EndGetResponse(result);

                    using (Stream stream = theResponse.GetResponseStream())
                    using (StreamReader reader = new StreamReader(stream))
                    {
                        contents = reader.ReadToEnd();
                    }

                    Dictionary<string, object> results = JsonConvert.DeserializeObject<Dictionary<string, object>>(contents);

                    _requestToken = (string)results ["oauth_token"];
                    _requestTokenSecret = (string)results ["oauth_token_secret"];

                    response(true);
                }
                catch (WebException e)
                {
                    response(false);
                }
            }
            else
            {
                response(false);
            }
        }), request);

    }
    catch (WebException e)
    {
        response(false);
    }

}

我的旧（非异步）代码运行正常 -

public bool AcquireRequestToken()
{
    var headers = new Dictionary<string,string>()
    {
        { "oauth_callback", PercentEncode(_oAuthConfig.Callback) },
        { "oauth_consumer_key", _oAuthConfig.ConsumerKey },
        { "oauth_signature_method", "HMAC-SHA1" },
        { "oauth_timestamp", MakeTimestamp() },
        { "oauth_version", "1.0" }
    };

    string signature = MakeSignature ("POST", _oAuthConfig.RequestTokenUrl, headers);
    string compositeSigningKey = MakeSigningKey(_oAuthConfig.ConsumerSecret, null);
    string oauth_signature = MakeOAuthSignature(compositeSigningKey, signature);

    var wc = new WebClient ();
    headers.Add ("oauth_signature", PercentEncode(oauth_signature));
    wc.Headers [HttpRequestHeader.Authorization] = HeadersToOAuth(headers);

    try
    {
        var result = HttpUtility.ParseQueryString(wc.UploadString (new Uri(_oAuthConfig.RequestTokenUrl), ""));

        if (result ["oauth_callback_confirmed"] != null)
        {
            _requestToken = result ["oauth_token"];
            _requestTokenSecret = result ["oauth_token_secret"];

            return true;
        }
    }
    catch (Exception e)
    {
        return false;
    }

}

标题在新版本中略有不同，但保持相同并不起作用。

感谢您的任何建议！

Answer 1

标题错了。只有一个名为Authorization的HTTP标头：

Authorization: OAuth oauth_consumer_key="<the consumer key of your app>", oauth_nonce="<the nonce>", oauth_signature="<the signature>", oauth_signature_method="HMAC-SHA1", oauth_timestamp="<the timestamp>", oauth_token="<your token>", oauth_version="1.0"

此页面将告诉您如何制作它：https://dev.twitter.com/docs/auth/authorizing-request。除了两种方法外，所有方法都是一样的：

request_token需要oauth_callback，但不需要oauth_token（正常，因为您没有）。
access_token需要oauth_verifier（您将在第二步后获得）。

Twitter使用async获取request_token问题 - 401错误

1 个答案: