/// <summary>
/// Contacts Google for a request token, first step of the OAuth authentication process.
/// When successful, updates the OAuthParameter instance passed as parameter by setting
/// Token and TokenSecret.
/// </summary>
/// <param name="parameters">The OAuth parameters</param>
public static void GetUnauthorizedRequestToken(OAuthParameters parameters)
{
Uri requestUri = new Uri(string.Format("{0}?scope={1}", requestTokenUrl, OAuthBase.EncodingPerRFC3986(parameters.Scope)));
// callback is only needed when getting the request token
bool callbackExists = false;
if (!string.IsNullOrEmpty(parameters.Callback))
{
parameters.BaseProperties.Add(OAuthBase.OAuthCallbackKey, parameters.Callback);
callbackExists = true;
}
string headers = GenerateHeader(requestUri, "GET", parameters);
WebRequest request = WebRequest.Create(requestUri);
request.Headers.Add(headers);
WebResponse response = request.GetResponse();
string result = "";
if (response != null)
{
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
result = reader.ReadToEnd();
}
if (callbackExists)
{
parameters.BaseProperties.Remove(OAuthBase.OAuthCallbackKey);
}
// split results and update parameters
SortedDictionary <string, string> responseValues = OAuthBase.GetQueryParameters(result);
parameters.Token = responseValues[OAuthBase.OAuthTokenKey];
parameters.TokenSecret = responseValues[OAuthBase.OAuthTokenSecretKey];
}
/// <summary>
/// Refresh the OAuth 2.0 access token.
/// When successful, updates the OAuthParameter instance passed as parameter by setting
/// AccessToken, RefreshToken and TokenExpiry.
/// </summary>
/// <param name="parameters">The OAuth 2.0 parameters</param>
public static void RefreshAccessToken(OAuth2Parameters parameters)
{
OAuthBase.GetOAuth2AccessToken(parameters, OAuthBase.GetRefreshAccessTokenRequestBody(parameters));
}
/// <summary>
/// Exchanges the user-authorized request token for an OAuth 2.0 access token.
/// When successful, updates the OAuthParameter instance passed as parameter by setting
/// AccessToken, RefreshToken and TokenExpiry.
/// </summary>
/// <param name="parameters">The OAuth 2.0 parameters</param>
public static void GetAccessToken(OAuth2Parameters parameters)
{
OAuthBase.GetOAuth2AccessToken(parameters, OAuthBase.GetExchangeAccessCodeRequestBody(parameters));
}