/// <summary>
/// OAuth1.0a - 6.2.1. - Consumer Directs the User to the Service Provider
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public virtual string GetAuthorizationUrl(OAuthParameters parameters)
{
string authorizeTokenUrl = parameters.Url.TrimEnd('/');
string requestToken = parameters.Values["oauth_token"];
string authorzationUrl = Uri.UnescapeDataString($"{authorizeTokenUrl}?oauth_consumer_key={_config.ConsumerKey}&oauth_token={requestToken}");
if (parameters.Values.TryGetValue("oauth_callback", out string oauth_callback))
{
authorzationUrl += $"&oauth_callback={oauth_callback}";
}
return(authorzationUrl);
}
/// <summary>
///
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="parameters"></param>
/// <returns></returns>
protected virtual async Task <T> SendTokenRequestAsync <T>(OAuthParameters parameters) where T : TokenInfo, new()
{
if (!(parameters.HttpMethod.Equals(HttpMethod.Get) || parameters.HttpMethod.Equals(HttpMethod.Post)))
{
throw new NotImplementedException($"GetRequestTokenAsync by method: {parameters.HttpMethod.Method} is not implemented.");
}
//
var requestParameters = parameters.Values;
if (requestParameters.TryGetValue("oauth_token_secret", out string oauth_token_secret))
{
requestParameters.Remove("oauth_token_secret");
}
string signatureBaseString = GetSignatureBaseString(parameters.HttpMethod, parameters.Url, requestParameters);
string signature = GetSignature(signatureBaseString, _config.ConsumerSecret, oauth_token_secret);
requestParameters.Add("oauth_signature", Uri.EscapeDataString(signature));
string requestUrl = parameters.Binding == OAuthParametersBinding.QueryString
? $"{parameters.Url}?{ConcatParameterList(requestParameters, "&", quotedValues: true)}"
: parameters.Url;
var oauthHeader = parameters.Binding == OAuthParametersBinding.Header
? GetOAuthHeader(parameters.HttpMethod, parameters.Url, requestParameters)
: null;
string postData = parameters.Binding == OAuthParametersBinding.Body
? $"{ConcatParameterList(requestParameters, "&", quotedValues: true)}"
: null;
string responseText = await SendOAuthDataAsync(parameters.HttpMethod, requestUrl, oauthHeader, postData);
if (!responseText.ToLowerInvariant().Contains("oauth_token"))
{
var builder = new StringBuilder($"An error occured when trying to {parameters.HttpMethod.Method}: {parameters.Url}.");
builder.Append($"The response was: >> { responseText} <<\n\n");
throw new Exception(builder.ToString());
}
return(GetTokenInfo <T>(responseText));
}
/// <summary>
/// This behavior is optional. Implement as needed via an override in a sub-class.
/// </summary>
/// <param name="parameters"></param>
/// <returns></returns>
public virtual Task <AccessTokenInfo> RevokeAccessTokenAsync(OAuthParameters parameters)
{
throw new NotImplementedException("This behavior is optional. Implement as needed via an override in a sub-class.");
}
/// <summary>
/// OAuth1.0a - 6.3.1. - Consumer Requests an Access Token
/// </summary>
/// <param name="requestToken"></param>
/// <param name="requestTokenSecret"></param>
/// <param name="verifier"></param>
/// <returns></returns>
public virtual async Task <AccessTokenInfo> GetAccessTokenAsync(OAuthParameters parameters)
{
parameters.Values = GetOAuthRequestParameters(parameters.Values);
return(await SendTokenRequestAsync <AccessTokenInfo>(parameters));
}
