/// <summary>asynchronus get RequestToken</summary>
public Task <TokenResponse <RequestToken> > GetRequestToken(string requestTokenUrl, IEnumerable <KeyValuePair <string, string> > parameters = null, HttpContent postValue = null)
{
Precondition.NotNull(requestTokenUrl, "requestTokenUrl");
var handler = new OAuthMessageHandler(Client, token: null, optionalOAuthHeaderParameters: parameters);
return(GetTokenResponse(requestTokenUrl, handler, postValue, (key, secret) => new RequestToken(key, secret)));
}
/// <summary>asynchronus get GetAccessToken</summary>
public Task <TokenResponse <AccessToken> > GetAccessToken(string accessTokenUrl, RequestToken requestToken, string verifier, IEnumerable <KeyValuePair <string, string> > parameters = null, HttpContent postValue = null)
{
Precondition.NotNull(accessTokenUrl, "accessTokenUrl");
Precondition.NotNull(requestToken, "requestToken");
Precondition.NotNull(verifier, "verifier");
var verifierParam = new KeyValuePair <string, string>("oauth_verifier", verifier.Trim());
if (parameters == null)
{
parameters = Enumerable.Empty <KeyValuePair <string, string> >();
}
var handler = new OAuthMessageHandler(Client, token: requestToken, optionalOAuthHeaderParameters: parameters.Concat(new[] { verifierParam }));
return(GetTokenResponse(accessTokenUrl, handler, postValue, (key, secret) => new AccessToken(key, secret)));
}
async Task <TokenResponse <T> > GetTokenResponse <T>(string url, OAuthMessageHandler handler, HttpContent postValue, Func <string, string, T> tokenFactory) where T : Token
{
var client = new HttpClient(handler);
var response = await client.PostAsync(url, postValue ?? new FormUrlEncodedContent(Enumerable.Empty <KeyValuePair <string, string> >())).ConfigureAwait(false);
var tokenBase = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
if (response.StatusCode != HttpStatusCode.OK)
{
throw new HttpRequestException(response.StatusCode + ":" + tokenBase); // error message
}
var splitted = tokenBase.Split('&').Select(s => s.Split('=')).ToLookup(xs => xs[0], xs => xs[1]);
var token = tokenFactory(splitted["oauth_token"].First().UrlDecode(), splitted["oauth_token_secret"].First().UrlDecode());
var extraData = splitted.Where(kvp => kvp.Key != "oauth_token" && kvp.Key != "oauth_token_secret")
.SelectMany(g => g, (g, value) => new { g.Key, Value = value })
.ToLookup(kvp => kvp.Key, kvp => kvp.Value);
return(new TokenResponse <T>(token, extraData));
}