Twitter API无效或令牌已过期

Question

I'm trying to use the below code but for some reason I'm getting an invalid or expired token it seemed to work once but never again.

Any ideas? (consumerKey and consumerSecret are constants generated in the class.)

    public ActionResult Index()
    {
        string twitterAccount = System.Configuration.ConfigurationManager.AppSettings["twitterAccount"];
        JsonDeserializer jsonDeserializer = new JsonDeserializer();
        var model = new TwitterVM.LandingModel();

        var qs = GetToken();
        string oauthToken = qs["oauth_token"];
        string oauthTokenSecret = qs["oauth_token_secret"];

        RestClient client = new RestClient("https://api.twitter.com/1.1")
        {
            Authenticator = OAuth1Authenticator.ForProtectedResource(consumerKey, consumerSecret, oauthToken, oauthTokenSecret)
        };
        RestRequest request = new RestRequest("statuses/user_timeline", Method.GET);

        request.Parameters.Add(new Parameter()
        {
            Name = "screen_name",
            Value = twitterAccount,
            Type = ParameterType.GetOrPost
        });

        request.Parameters.Add(new Parameter()
        {
            Name = "count",
            Value = 10,
            Type = ParameterType.GetOrPost
        });

        request.Parameters.Add(new Parameter()
        {
            Name = "include_rts",
            Value = true,
            Type = ParameterType.GetOrPost
        });

        request.Parameters.Add(new Parameter()
        {
            Name = "include_entities",
            Value = true,
            Type = ParameterType.GetOrPost
        });

        IRestResponse response = client.Execute(request);

        model.Tweets =
          jsonDeserializer.Deserialize<List<TwitterVM.Tweet>>(response);

        return View(model);
    }


    private NameValueCollection GetToken()
    {
        RestClient client = new RestClient("https://api.twitter.com") { Authenticator = OAuth1Authenticator.ForRequestToken(consumerKey, consumerSecret) };
        //Do the auth shit...
        RestRequest request = new RestRequest("oauth/request_token", Method.POST);
        IRestResponse response = client.Execute(request);

        return HttpUtility.ParseQueryString(response.Content);
    }

Answer 1

Using Twitter's OAuth2 API ( https://api.twitter.com/oauth2/token )

See https://dev.twitter.com/oauth/application-only for details....

var client = await CreateHttpClient("....", "....");
//don't dispose this client and use for subsequent API calls

var screenName = "....";
var count = 10;
var include_rts = true;
var url = $"https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name={screenName}&include_rts={include_rts}&count={count}";

var json = await client.GetStringAsync(url);

---

public static async Task<HttpClient> CreateHttpClient(string consumerKey, string consumerSecret)
{
    var bearerToken = Convert.ToBase64String(Encoding.UTF8.GetBytes(consumerKey + ":" + consumerSecret));
    string url = "https://api.twitter.com/oauth2/token";


    HttpClient client = new HttpClient();

    client.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", "Basic " + bearerToken);

    var resp = await client.PostAsync(url, new StringContent("grant_type=client_credentials", Encoding.UTF8, "application/x-www-form-urlencoded")).ConfigureAwait(false);
    resp.EnsureSuccessStatusCode();
    var result = await resp.Content.ReadAsStringAsync().ConfigureAwait(false);
    var jObj = new JavaScriptSerializer().Deserialize<Dictionary<string,string>>(result);

    if (jObj["token_type"] != "bearer") throw new Exception("Invalid Response From Twitter/OAuth");

    client.DefaultRequestHeaders.Remove("Authorization");
    client.DefaultRequestHeaders.TryAddWithoutValidation("Authorization", "Bearer " + jObj["access_token"]);
    return client;
}