private OAuthResponse FetchToken(OAuthEnvironment environment, String requestPayload, TokenType tokenType)
{
//Get credentials
CredentialUtil.Credentials credentials = GetCredentials(environment);
//Initialize client
RestClient client = new RestClient
{
BaseUrl = new Uri(environment.ApiEndpoint())
};
//Create request
RestRequest request = new RestRequest(Method.POST);
//Add headers
request.AddHeader(Constants.HEADER_AUTHORIZATION, OAuth2Util.CreateAuthorizationHeader(credentials));
//Set request payload
request.AddParameter(Constants.HEADER_CONTENT_TYPE, requestPayload, ParameterType.RequestBody);
//Call the API
IRestResponse response = client.Execute(request);
//Parse response
OAuthResponse oAuthResponse = HandleApiResponse(response, tokenType);
return(oAuthResponse);
}
/*
* Use this operation to get the Authorization URL to redirect the user to.
* Once the user authenticates and approves the consent, the callback need to be
* captured by the redirect URL setup by the app
*/
public String GenerateUserAuthorizationUrl(OAuthEnvironment environment, IList <String> scopes, String state)
{
//Validate request
ValidateEnvironmentAndScopes(environment, scopes);
//Get credentials
CredentialUtil.Credentials credentials = GetCredentials(environment);
//Format scopes
String formattedScopes = OAuth2Util.FormatScopesForRequest(scopes);
//Prepare URL
StringBuilder sb = new StringBuilder();
sb.Append(environment.WebEndpoint()).Append("?");
//Prepare request payload
Dictionary <String, String> queryParams = new Dictionary <string, string>
{
{ Constants.PAYLOAD_CLIENT_ID, credentials.Get(CredentialType.APP_ID) },
{ Constants.PAYLOAD_RESPONSE_TYPE, Constants.PAYLOAD_VALUE_CODE },
{ Constants.PAYLOAD_REDIRECT_URI, credentials.Get(CredentialType.REDIRECT_URI) },
{ Constants.PAYLOAD_SCOPE, formattedScopes }
};
if (state != null)
{
queryParams.Add(Constants.PAYLOAD_STATE, state);
}
sb.Append(OAuth2Util.CreateRequestPayload(queryParams));
log.Debug("Authorization url " + sb);
return(sb.ToString());
}
/*
* Use this operation to update the access token if it has expired
*/
public OAuthResponse GetAccessToken(OAuthEnvironment environment, String refreshToken, IList <String> scopes)
{
//Validate request
ValidateEnvironmentAndScopes(environment, scopes);
ValidateInput("RefreshToken", refreshToken);
//Get credentials
CredentialUtil.Credentials credentials = GetCredentials(environment);
//Format scopes
String formattedScopes = OAuth2Util.FormatScopesForRequest(scopes);
// Create request payload
Dictionary <String, String> payloadParams = new Dictionary <string, string>
{
{ Constants.PAYLOAD_GRANT_TYPE, Constants.PAYLOAD_VALUE_REFRESH_TOKEN },
{ Constants.PAYLOAD_REFRESH_TOKEN, refreshToken },
{ Constants.PAYLOAD_SCOPE, formattedScopes }
};
String requestPayload = OAuth2Util.CreateRequestPayload(payloadParams);
OAuthResponse oAuthResponse = FetchToken(environment, requestPayload, TokenType.USER);
return(oAuthResponse);
}
private CredentialUtil.Credentials GetCredentials(OAuthEnvironment environment)
{
CredentialUtil.Credentials credentials = CredentialUtil.GetCredentials(environment);
if (credentials == null)
{
throw new ArgumentException("Credentials have not been loaded for " + environment.ConfigIdentifier());
}
return(credentials);
}
/*
* Create Base64 encoded Authorization header value
*/
public static String CreateAuthorizationHeader(CredentialUtil.Credentials credentials)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append(credentials.Get(CredentialType.APP_ID)).Append(Constants.CREDENTIAL_DELIMITER);
stringBuilder.Append(credentials.Get(CredentialType.CERT_ID));
var plainTextBytes = Encoding.UTF8.GetBytes(stringBuilder.ToString());
string encodedText = Convert.ToBase64String(plainTextBytes);
return(Constants.HEADER_PREFIX_BASIC + encodedText);
}
public void GetCredentials_Success()
{
String path = @"../../../ebay-config-sample.yaml";
CredentialUtil.Load(path);
CredentialUtil.Credentials credentials = CredentialUtil.GetCredentials(OAuthEnvironment.PRODUCTION);
Assert.NotNull(credentials);
Assert.NotNull(credentials.Get(CredentialType.APP_ID));
Assert.NotNull(credentials.Get(CredentialType.DEV_ID));
Assert.NotNull(credentials.Get(CredentialType.CERT_ID));
Assert.NotNull(credentials.Get(CredentialType.REDIRECT_URI));
}
public void CreateAuthorizationHeader_Success()
{
String path = @"../../../ebay-config-sample.yaml";
CredentialUtil.Load(path);
CredentialUtil.Credentials credentials = CredentialUtil.GetCredentials(OAuthEnvironment.PRODUCTION);
String authorizationHeader = OAuth2Util.CreateAuthorizationHeader(credentials);
Assert.NotNull(authorizationHeader);
Boolean headerStartsWithBasic = authorizationHeader.StartsWith("Basic ", StringComparison.Ordinal);
Assert.True(headerStartsWithBasic);
}
/*
* Use this operation to update the access token if it has expired
*/
public OAuthResponse GetAccessToken(OAuthEnvironment environment, String refreshToken, IList <String> scopes)
{
//Validate request
ValidateEnvironmentAndScopes(environment, scopes);
ValidateInput("RefreshToken", refreshToken);
//Get credentials
CredentialUtil.Credentials credentials = GetCredentials(environment);
//Format scopes
String formattedScopes = OAuth2Util.FormatScopesForRequest(scopes);
// Create request payload
Dictionary <String, String> payloadParams = new Dictionary <string, string>
{
{ Constants.PAYLOAD_GRANT_TYPE, Constants.PAYLOAD_VALUE_REFRESH_TOKEN },
{ Constants.PAYLOAD_REFRESH_TOKEN, refreshToken },
{ Constants.PAYLOAD_SCOPE, formattedScopes }
};
String requestPayload = OAuth2Util.CreateRequestPayload(payloadParams);
OAuthResponse oAuthResponse;
//Check for token in cache
oAuthResponse = accessTokenCache.GetValue(environment);
if (oAuthResponse != null && oAuthResponse.AccessToken != null && oAuthResponse.AccessToken.Token != null)
{
log.Info("Returning access token from cache for " + environment.ConfigIdentifier());
return(oAuthResponse);
}
oAuthResponse = FetchToken(environment, requestPayload, TokenType.USER);
if (oAuthResponse != null && oAuthResponse.AccessToken != null)
{
accessTokenCache.UpdateValue(environment, oAuthResponse, oAuthResponse.AccessToken.ExpiresOn);
}
return(oAuthResponse);
}
/*
* Use this operation to get the refresh and access tokens.
*/
public OAuthResponse ExchangeCodeForAccessToken(OAuthEnvironment environment, String code)
{
//Validate request
ValidateInput("Environment", environment);
ValidateInput("Code", code);
//Get credentials
CredentialUtil.Credentials credentials = GetCredentials(environment);
// Create request payload
Dictionary <String, String> payloadParams = new Dictionary <string, string>
{
{ Constants.PAYLOAD_GRANT_TYPE, Constants.PAYLOAD_VALUE_AUTHORIZATION_CODE },
{ Constants.PAYLOAD_REDIRECT_URI, credentials.Get(CredentialType.REDIRECT_URI) },
{ Constants.PAYLOAD_CODE, code }
};
String requestPayload = OAuth2Util.CreateRequestPayload(payloadParams);
OAuthResponse oAuthResponse = FetchToken(environment, requestPayload, TokenType.USER);
return(oAuthResponse);
}
