c# - 尝试调用 Twitter 流 API 时出现 401 错误

Question

我对此束手无策，我在这里到处寻找，虽然有人问过与我类似的问题，但我找不到确切的答案。

我一直在尝试调用https://stream.twitter.com/1.1/statuses/filter.json几天来在 C# 控制台应用程序中，并不断收到 401 未经授权的错误，无论我做什么都不会消失。也适用于任何非流式传输的内容。

const string streamUrl = "https://stream.twitter.com/1.1/statuses/filter.json";
const string oauth_token = "XXX-XXXXX";
const string oauth_token_secret = "XXXXXXXXXXXX";
const string oauth_consumer_key = "XXXXXXXXXXXXX";
const string oauth_consumer_secret = "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX";

// oauth implementation details
const string oauth_version = "1.0a";
const string oauth_signature_method = "HMAC-SHA1";

// unique request details
var oauth_nonce = Convert.ToBase64String(
    new ASCIIEncoding().GetBytes(DateTime.Now.Ticks.ToString()));
var timeSpan = DateTime.UtcNow
    - new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
var oauth_timestamp = Convert.ToInt64(timeSpan.TotalSeconds).ToString();

// create oauth signature
const string baseFormat = "oauth_consumer_key={0}&oauth_nonce={1}&oauth_signature_method={2}" +
    "&oauth_timestamp={3}&oauth_token={4}&oauth_version={5}&track=twitter";

var baseString = string.Format(baseFormat,
    oauth_consumer_key,
    oauth_nonce,
    oauth_signature_method,
    oauth_timestamp,
    oauth_token,
    oauth_version);

string oauth_signature;

var compositeKey = string.Concat(Uri.EscapeDataString(oauth_consumer_secret),
    "&", Uri.EscapeDataString(oauth_token_secret));

using (var hasher = new HMACSHA1(Encoding.ASCII.GetBytes(compositeKey)))
{
    oauth_signature = Convert.ToBase64String(hasher.ComputeHash(Encoding.ASCII.GetBytes(baseString)));
}

// create the request header
const string headerFormat = "OAuth oauth_consumer_key=\"{0}\", oauth_nonce=\"{1}\", " +
    "oauth_signature=\"{2}\", oauth_signature_method=\"{3}\", " +
    "oauth_timestamp=\"{4}\", oauth_token=\"{5}\", " +
    "oauth_version=\"{6}\"";

var authHeader = string.Format(headerFormat,
    Uri.EscapeDataString(oauth_consumer_key),
    Uri.EscapeDataString(oauth_nonce),
    Uri.EscapeDataString(oauth_signature),
    Uri.EscapeDataString(oauth_signature_method),
    Uri.EscapeDataString(oauth_timestamp),
    Uri.EscapeDataString(oauth_token),
    Uri.EscapeDataString(oauth_version));

const string postparameters = "track=twitter";

streamUrl = string.Format("{0}?{1}", streamUrl, postparameters);

while (true)
{
    var timeLineRequest = (HttpWebRequest)WebRequest.Create(streamUrl);
    timeLineRequest.Headers.Add("Authorization", authHeader);
    var encode = System.Text.Encoding.GetEncoding("utf-8");

    ServicePointManager.Expect100Continue = false;

    if (postparameters.Length > 0)
    {
        timeLineRequest.Method = "POST";
        timeLineRequest.ContentType = "application/x-www-form-urlencoded;charset=UTF-8";

        byte[] _twitterTrack = encode.GetBytes(postparameters);

        timeLineRequest.ContentLength = _twitterTrack.Length;
        Stream _twitterPost = timeLineRequest.GetRequestStream();
        _twitterPost.Write(_twitterTrack, 0, _twitterTrack.Length);
        _twitterPost.Close();
    }

    var webResponse = (HttpWebResponse)timeLineRequest.GetResponse();
    var responseStream = new StreamReader(webResponse.GetResponseStream(), encode);

    while (true)
    {
        var jsonText = responseStream.ReadLine();

        //Success
        int wait = 250;

        //Write Status
        var status = string.Empty;
        var json = new DataContractJsonSerializer(status.GetType());
        byte[] byteArray = Encoding.UTF8.GetBytes(jsonText);
        var stream = new MemoryStream(byteArray);
        status = json.ReadObject(stream) as string;
        Console.Beep();
        Console.WriteLine(status);
    }               
}

我真的很想看看是否有其他人通过了这个障碍。我厌倦了咒骂这个。

Answer 1

在计算签名之前，您还没有将 HTTP 方法或基本 URL 包含到您的 baseString 中。这取自 Twitter site :

创建签名基础字符串

到目前为止收集的三个值必须连接起来形成一个字符串，签名将从中生成。这被 OAuth 规范称为签名基础字符串。

将 HTTP 方法、基本 URL 和参数字符串编码为单个字符串:

1. 将 HTTP 方法转换为大写并将输出字符串设置为该值。

2. 将“&”字符附加到输出字符串。

3. 百分比编码 URL 并将其附加到输出字符串。

4. 将“&”字符附加到输出字符串。

5. Percent 编码参数字符串并将其附加到输出字符串。