/// <summary>
/// Add a signature to a Hash of parameters. The signature will be generated
/// from the app secret and the provided parameters, and should be used
/// whenever signed data needs to be sent to GoCardless (e.g. when creating
/// a new subscription). The signature will be added to the hash under the
/// key signature.
/// </summary>
/// <param name="params">the parameters to sign</param>
/// <returns>the parameters with the new signature key</returns>
private static Utils.HashParams SignParams(Utils.HashParams @params)
{
var signature = Utils.GetSignatureForParams(@params, GoCardless.AccountDetails.AppSecret);
@params.Add("signature", signature);
return(@params);
}
/// <summary>
/// Generate the URL for creating a limit, including the
/// provided params, nonce, timestamp and signature
/// </summary>
/// <param name="type">the limit type (subscription, etc)</param>
/// <param name="requestResource">the request values</param>
/// <param name="redirectUri">optional override URI on success</param>
/// <param name="cancelUri">optional override URI on cancel</param>
/// <param name="state">optional state, gets passed back with the successful payload</param>
/// <returns>the generated URL</returns>
private static string GenerateNewLimitUrl(string type, object requestResource, string redirectUri = null, string cancelUri = null, string state = null)
{
var hash = new Utils.HashParams
{
{ "client_id", GoCardless.AccountDetails.AppId },
{ "nonce", GoCardless.GenerateNonce() },
{ "timestamp", GoCardless.GetUtcNow().IsoFormatTime() },
};
hash = requestResource.ToHashParams(hash, type);
if (redirectUri != null)
{
hash.Add("redirect_uri", redirectUri);
}
if (cancelUri != null)
{
hash.Add("cancel_uri", cancelUri);
}
if (state != null)
{
hash.Add("state", state);
}
hash = SignParams(hash);
var url = GoCardless.BaseUrl + "/connect/" + type + "s/new?" + hash.ToQueryString();
return(url);
}
public MerchantAccessTokenResponse ParseCreateMerchantResponse(string redirectUri, string code)
{
var hash = new Utils.HashParams
{
{"client_id", GoCardless.AccountDetails.AppId},
{"redirect_uri", redirectUri},
{"code", code},
{"grant_type", "authorization_code"},
};
var tokenUrl = "oauth/access_token?" + hash.ToQueryString();
var client = new RestClient
{
BaseUrl = GoCardless.BaseUrl,
UserAgent = GoCardless.UserAgent
};
client.Authenticator = new HttpBasicAuthenticator(GoCardless.AccountDetails.AppId, GoCardless.AccountDetails.AppSecret);
var restRequest = new RestRequest(tokenUrl);
restRequest.RequestFormat = DataFormat.Json;
restRequest.Method = Method.POST;
var response = client.Execute<MerchantAccessTokenResponse>(restRequest);
if (response.StatusCode == HttpStatusCode.OK)
{
return response.Data;
}
else
{
throw new ApiException("Invalid response getting access token from " + tokenUrl)
{
Content = JObject.Parse(response.Content)
};
}
}
public MerchantAccessTokenResponse ParseCreateMerchantResponse(string redirectUri, string code)
{
var hash = new Utils.HashParams
{
{ "client_id", GoCardless.AccountDetails.AppId },
{ "redirect_uri", redirectUri },
{ "code", code },
{ "grant_type", "authorization_code" },
};
var tokenUrl = "oauth/access_token?" + hash.ToQueryString();
var client = new RestClient
{
BaseUrl = GoCardless.BaseUrl,
UserAgent = GoCardless.UserAgent
};
client.Authenticator = new HttpBasicAuthenticator(GoCardless.AccountDetails.AppId, GoCardless.AccountDetails.AppSecret);
var restRequest = new RestRequest(tokenUrl);
restRequest.RequestFormat = DataFormat.Json;
restRequest.Method = Method.POST;
var response = client.Execute <MerchantAccessTokenResponse>(restRequest);
if (response.StatusCode == HttpStatusCode.OK)
{
return(response.Data);
}
else
{
throw new ApiException("Invalid response getting access token from " + tokenUrl)
{
Content = JObject.Parse(response.Content)
};
}
}
/// <summary>
/// Generate the URL for creating a limit, including the
/// provided params, nonce, timestamp and signature
/// </summary>
/// <param name="type">the limit type (subscription, etc)</param>
/// <param name="requestResource">the request values</param>
/// <param name="redirectUri">optional override URI on success</param>
/// <param name="cancelUri">optional override URI on cancel</param>
/// <param name="state">optional state, gets passed back with the successful payload</param>
/// <returns>the generated URL</returns>
private static string GenerateNewLimitUrl(string type, object requestResource,
string redirectUri = null, string cancelUri = null, string state = null)
{
var hash = new Utils.HashParams
{
{"client_id", GoCardless.AccountDetails.AppId},
{"nonce", GoCardless.GenerateNonce()},
{"timestamp", GoCardless.GetUtcNow().IsoFormatTime()},
};
hash = requestResource.ToHashParams(hash, type);
if (redirectUri != null)
{
hash.Add("redirect_uri", redirectUri);
}
if (cancelUri != null)
{
hash.Add("cancel_uri", cancelUri);
}
if (state != null)
{
hash.Add("state", state);
}
hash = SignParams(hash);
var url = GoCardless.BaseUrl + "/connect/" + type + "s/new?" + hash.ToQueryString();
return url;
}
