/// <summary>
/// Request access token responding to authenticated request token.
/// </summary>
/// <param name="verifier">Verifier string for authenticaed request token</param>
/// <param name="requestToken">Authenticated request token</param>
/// <param name="accessTokenUrl">Access token URL</param>
/// <param name="realm">Realm for requesting access token</param>
/// <param name="additionalParameters">Parameters added to Authorization header</param>
/// <param name="responseParameters" >Parameters returned in response</param>
/// <param name="createRequest" >Factory method to create request object</param>
/// <returns>Responding access token</returns>
public AccessToken RequestAccessToken(
String verifier,
RequestToken requestToken,
String accessTokenUrl,
String realm,
Parameter[] additionalParameters,
ref Parameter [] responseParameters,
RequestFactoryMethod createRequest)
{
if (additionalParameters == null)
{
additionalParameters = new Parameter[0];
}
String oauth_consumer_key = _consumerKey;
String oauth_token = requestToken.TokenValue;
String oauth_signature_method = "HMAC-SHA1";
String oauth_timestamp =
((DateTime.UtcNow.Ticks - new DateTime(1970, 1, 1).Ticks) / (1000 * 10000)).ToString();
String oauth_nonce =
Guid.NewGuid().ToString();
HttpWebRequest req = createRequest(accessTokenUrl);
if (_webProxy != null)
{
req.Proxy = _webProxy;
}
req.Method = "POST";
String oauth_signature =
CreateHMACSHA1Signature(
req.Method,
accessTokenUrl,
Parameter.ConCatAsArray(
new Parameter[] {
new Parameter("oauth_consumer_key", oauth_consumer_key),
new Parameter("oauth_token", oauth_token),
new Parameter("oauth_signature_method", oauth_signature_method),
new Parameter("oauth_timestamp", oauth_timestamp),
new Parameter("oauth_nonce", oauth_nonce),
new Parameter("oauth_verifier", verifier),
},
additionalParameters
),
_consumerSecret,
requestToken.TokenSecret
);
req.Headers.Add(
"Authorization: OAuth " +
"realm=\"" + realm + "\"," +
"oauth_consumer_key=\"" + Parameter.EncodeParameterString(oauth_consumer_key) + "\"," +
"oauth_token=\"" + Parameter.EncodeParameterString(oauth_token) + "\"," +
"oauth_signature_method=\"" + Parameter.EncodeParameterString(oauth_signature_method) + "\"," +
"oauth_signature=\"" + Parameter.EncodeParameterString(oauth_signature) + "\"," +
"oauth_timestamp=\"" + Parameter.EncodeParameterString(oauth_timestamp) + "\"," +
"oauth_nonce=\"" + Parameter.EncodeParameterString(oauth_nonce) + "\"," +
"oauth_verifier=\"" + Parameter.EncodeParameterString(verifier) + "\"" +
(additionalParameters.Length > 0 ?
"," + Parameter.ConCat(additionalParameters, "\"") :
""
)
);
HttpWebResponse resp = null;
try
{
resp = (HttpWebResponse)req.GetResponse();
StreamReader sr = new StreamReader(resp.GetResponseStream());
responseParameters =
Parameter.Parse(sr.ReadToEnd());
String accessToken = null;
String accessTokenSecret = null;
foreach (Parameter param in responseParameters)
{
if (param.Name == "oauth_token")
{
accessToken = param.Value;
}
if (param.Name == "oauth_token_secret")
{
accessTokenSecret = param.Value;
}
}
if (accessToken == null || accessTokenSecret == null)
{
throw new InvalidOperationException();
}
return(new AccessToken(accessToken, accessTokenSecret));
}
finally
{
if (resp != null)
{
resp.Close();
}
}
}
