public async Task <Tokens> AccessToken(string requestToken, string verifier)
{
const string endpoint = "https://api.twitter.com/oauth/access_token";
if (string.IsNullOrEmpty(requestToken))
{
throw new ArgumentNullException(nameof(requestToken));
}
if (string.IsNullOrEmpty(verifier))
{
throw new ArgumentNullException(nameof(verifier));
}
var dic = new Query()
{
[OAuthHelper.OAuthKeys.Token] = requestToken,
[OAuthHelper.OAuthKeys.Verifier] = verifier,
};
var webReq = WebUtility.CreateOAuthWebRequest(endpoint, _tokens, dic, "post");
using (var webRes = await webReq.GetResponseAsync())
using (var sr = new StreamReader(webRes.GetResponseStream()))
{
var splitCharacters = new[] { '=' };
foreach (var pair in sr.ReadToEnd().Split('&'))
{
var t = pair.Split(splitCharacters, 2);
switch (t[0])
{
case "oauth_token":
this._tokens.AccessToken = t[1]; break;
case "oauth_token_secret":
this._tokens.AccessTokenSecret = t[1]; break;
case "user_id":
this._tokens.UserId = long.TryParse(t[1], out var b) ? b : -1; break;
case "screen_name":
this._tokens.ScreenName = t[1]; break;
}
}
return(_tokens);
}
}
public async Task <RequestTokenResponse> RequestToken(string callbackUrl = null)
{
const string endpoint = "https://api.twitter.com/oauth/request_token";
var dic = new Query();
if (!string.IsNullOrEmpty(callbackUrl))
{
dic[OAuthHelper.OAuthKeys.Callback] = callbackUrl;
}
var webReq = WebUtility.CreateOAuthWebRequest(endpoint, _tokens, dic, "post");
using (var webRes = await webReq.GetResponseAsync())
using (var sr = new StreamReader(webRes.GetResponseStream()))
{
return(new RequestTokenResponse(sr.ReadToEnd()));
}
}