/// <summary>
/// To get access token from grantToken.
/// </summary>
/// <returns>ZohoOAuthTokens class instance.</returns>
/// <param name="grantToken">Grant token (String) of the oauth client</param>
public ZohoOAuthTokens GenerateAccessToken(string grantToken)
{
if (grantToken == null || grantToken.Length == 0)
{
throw new ZohoOAuthException("Grant Type is not provided");
}
try
{
var conn = GetZohoConnector(ZohoOAuth.GetTokenURL());
conn.AddParam(ZohoOAuthConstants.GRANT_TYPE, ZohoOAuthConstants.GRANT_TYPE_AUTH_CODE);
conn.AddParam(ZohoOAuthConstants.CODE, grantToken);
string response = conn.Post();
JObject responseJSON = JObject.Parse(response);
if (responseJSON.ContainsKey(ZohoOAuthConstants.ACCESS_TOKEN))
{
ZohoOAuthTokens tokens = GetTokensFromJSON(responseJSON);
tokens.UserMaiilId = GetUserMailId(tokens.AccessToken);
ZohoOAuth.GetPersistenceHandlerInstance().SaveOAuthTokens(tokens);
return(tokens);
}
throw new ZohoOAuthException("Exception while fetching Access Token from grant token" + response);
}
catch (WebException e)
{
ZCRMLogger.LogError(e);
throw new ZohoOAuthException(e);
}
}
public string GetAccessToken(string userMailId)
{
IZohoPersistenceHandler persistenceHandler = ZohoOAuth.GetPersistenceHandlerInstance();
ZohoOAuthTokens tokens;
try
{
ZCRMLogger.LogInfo("Retreiving access token..");
tokens = persistenceHandler.GetOAuthTokens(userMailId);
}
catch (Exception e) when(!(e is ZohoOAuthException))
{
ZCRMLogger.LogError("Exception while fetching tokens from persistence" + e);
throw new ZohoOAuthException(e);
}
try
{
return(tokens.AccessToken);
}
catch (ZohoOAuthException)
{
ZCRMLogger.LogInfo("Access Token expired, Refreshing Access token");
tokens = RefreshAccessToken(tokens.RefreshToken, userMailId);
}
return(tokens.AccessToken);
}
//TODO: Create ZohoOAuthException class and change the throw exception class;
private ZohoOAuthTokens RefreshAccessToken(string refreshToken, string userMailId)
{
if (refreshToken == null)
{
throw new ZohoOAuthException("Refresh token is not provided");
}
try{
ZohoHTTPConnector conn = GetZohoConnector(ZohoOAuth.GetRefreshTokenURL());
conn.AddParam(ZohoOAuthConstants.GRANT_TYPE, ZohoOAuthConstants.REFRESH_TOKEN);
conn.AddParam(ZohoOAuthConstants.REFRESH_TOKEN, refreshToken);
string response = conn.Post();
JObject responseJSON = JObject.Parse(response);
if (responseJSON.ContainsKey(ZohoOAuthConstants.ACCESS_TOKEN))
{
ZohoOAuthTokens tokens = GetTokensFromJSON(responseJSON);
tokens.RefreshToken = refreshToken;
tokens.UserMaiilId = userMailId;
ZohoOAuth.GetPersistenceHandlerInstance().SaveOAuthTokens(tokens);
return(tokens);
}
throw new ZohoOAuthException("Exception while fetching access tokens from Refresh Token" + response);
}catch (WebException e) {
ZCRMLogger.LogError(e);
throw new ZohoOAuthException(e);
}
}
//TODO: the method throws three exceptions and check for null exception on access_token.
private string GetUserMailId(string accessToken)
{
try
{
ZohoHTTPConnector conn = new ZohoHTTPConnector()
{
Url = ZohoOAuth.GetUserInfoURL()
};
conn.AddHeader("Authorization", ZohoOAuthConstants.AuthHeaderPrefix + accessToken);
string response = conn.Get();
JObject responseJSON = JObject.Parse(response);
return(responseJSON["Email"].ToString());
}
catch (WebException) { throw; }
}
//TODO: the method throws three exceptions and check for null exception on access_token.
private string GetUserMailId(string accessToken)
{
try
{
ZohoHTTPConnector conn = new ZohoHTTPConnector()
{
Url = ZohoOAuth.GetUserInfoURL()
};
conn.AddHeader("Authorization", ZohoOAuthConstants.AuthHeaderPrefix + accessToken);
string response = conn.Get();
JObject responseJSON = JObject.Parse(response);
return(responseJSON["Email"].ToString());
}
catch (Exception ex)
{
ZCRMLogger.LogError(ex);
throw new ZohoOAuthException("Exception while fetching User email from access token, Make sure AAAserver.profile.Read scope is included while generating the Grant token.");
}
}
