/// <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="queryString">The query string containing the access code</param>
/// <param name="parameters">The OAuth 2.0 parameters</param>
public static void GetAccessToken(String queryString, OAuth2Parameters parameters)
{
// split results and update parameters
SortedDictionary <string, string> responseValues = OAuthBase.GetQueryParameters(queryString);
parameters.AccessCode = responseValues[OAuthBase.OAuth2AccessCode];
GetAccessToken(parameters);
}
/// <summary>
/// Send the request body to the OAuth 2.0 token endpoint to retrieve an 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>
/// <param name="requestBody">The request body to send</param>
public static void GetOAuth2AccessToken(OAuth2Parameters parameters, String requestBody)
{
Uri requestUri = new Uri(parameters.TokenUri);
WebRequest request = WebRequest.Create(requestUri);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
Stream outputStream = request.GetRequestStream();
StreamWriter w = new StreamWriter(outputStream);
w.Write(requestBody);
w.Flush();
w.Close();
WebResponse response = request.GetResponse();
string result = "";
if (response != null)
{
Stream responseStream = response.GetResponseStream();
StreamReader reader = new StreamReader(responseStream);
result = reader.ReadToEnd();
Dictionary <string, string> dict = JsonConvert.DeserializeObject <Dictionary <string, string> >(result);
if (dict.ContainsKey(OAuth2AccessToken))
{
parameters.AccessToken = dict[OAuth2AccessToken];
}
if (dict.ContainsKey(OAuth2RefreshToken))
{
parameters.RefreshToken = dict[OAuth2RefreshToken];
}
if (dict.ContainsKey(OAuth2TokenType))
{
parameters.TokenType = dict[OAuth2TokenType];
}
if (dict.ContainsKey(OAuth2ExpiresIn))
{
parameters.TokenExpiry = DateTime.Now.AddSeconds(int.Parse(dict[OAuth2ExpiresIn]));
}
}
}
/// <summary>
/// Generate the request body for refreshing an access token.
/// </summary>
/// <param name="parameters">The OAuth 2.0 parameters</param>
public static String GetRefreshAccessTokenRequestBody(OAuth2Parameters parameters)
{
if (string.IsNullOrEmpty(parameters.RefreshToken))
{
throw new ArgumentNullException("refresh_token");
}
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}={1}", OAuth2GrantType, "refresh_token");
sb.AppendFormat("&{0}={1}", OAuth2ClientId, EncodingPerRFC3986(parameters.ClientId));
sb.AppendFormat("&{0}={1}", OAuth2ClientSecret, EncodingPerRFC3986(parameters.ClientSecret));
sb.AppendFormat("&{0}={1}", OAuth2RefreshToken, EncodingPerRFC3986(parameters.RefreshToken));
return(sb.ToString());
}
/// <summary>
/// Generate the request body for exchanging an access code for an access token.
/// </summary>
/// <param name="parameters">The OAuth 2.0 parameters</param>
public static String GetExchangeAccessCodeRequestBody(OAuth2Parameters parameters)
{
if (string.IsNullOrEmpty(parameters.AccessCode))
{
throw new ArgumentNullException("access_code");
}
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}={1}", OAuth2GrantType, "authorization_code");
sb.AppendFormat("&{0}={1}", OAuth2ClientId, EncodingPerRFC3986(parameters.ClientId));
sb.AppendFormat("&{0}={1}", OAuth2ClientSecret, EncodingPerRFC3986(parameters.ClientSecret));
sb.AppendFormat("&{0}={1}", OAuth2AccessCode, EncodingPerRFC3986(parameters.AccessCode));
sb.AppendFormat("&{0}={1}", OAuth2RedirectUri, EncodingPerRFC3986(parameters.RedirectUri));
return(sb.ToString());
}
/// <summary>
/// Generates the url which the user should visit in order to authenticate and
/// authorize with the Service Provider.
/// When successful, updates the OAuth2Parameters instance passed as parameter by setting
/// the returned access code.
/// </summary>
/// <param name="parameters">The OAuth 2.0 parameters</param>
/// <returns>The full authorization url the user should visit</returns>
public static string CreateOAuth2AuthorizationUrl(OAuth2Parameters parameters)
{
StringBuilder sb = new StringBuilder();
sb.Append(parameters.AuthUri);
sb.AppendFormat("?{0}={1}", OAuthBase.OAuth2ResponseType, OAuthBase.EncodingPerRFC3986(parameters.ResponseType));
sb.AppendFormat("&{0}={1}", OAuthBase.OAuth2ClientId, OAuthBase.EncodingPerRFC3986(parameters.ClientId));
sb.AppendFormat("&{0}={1}", OAuthBase.OAuth2RedirectUri, OAuthBase.EncodingPerRFC3986(parameters.RedirectUri));
sb.AppendFormat("&{0}={1}", OAuthBase.OAuthScopeKey, OAuthBase.EncodingPerRFC3986(parameters.Scope));
sb.AppendFormat("&{0}={1}", OAuthBase.OAuth2AccessType, OAuthBase.EncodingPerRFC3986(parameters.AccessType));
sb.AppendFormat("&{0}={1}", OAuthBase.OAuth2ApprovalPrompt, OAuthBase.EncodingPerRFC3986(parameters.ApprovalPrompt));
if (!string.IsNullOrEmpty(parameters.State))
{
sb.AppendFormat("&{0}={1}", OAuthBase.OAuth2State, OAuthBase.EncodingPerRFC3986(parameters.State));
}
return(sb.ToString());
}
/// <summary>
/// Constructor.
/// </summary>
public GOAuth2RequestFactory(string service, string applicationName, OAuth2Parameters parameters)
: base(service, applicationName)
{
Parameters = parameters;
}
/// <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));
}
/// <summary>
/// a constructor for OAuth 2.0
/// </summary>
/// <param name="applicationName">The name of the application</param>
/// <param name="consumerKey">the consumerKey to use</param>
/// <param name="consumerSecret">the consumerSecret to use</param>
/// <param name="token">The token to be used</param>
/// <param name="tokenSecret">The tokenSecret to be used</param>
/// <returns></returns>
public OAuth2Authenticator(string applicationName, OAuth2Parameters parameters)
: base(applicationName)
{
_parameters = parameters;
}
