public AuthenticationResult GetAuthenticationResult(Uri responseUri, OAuthRequestCode request)
{
QueryValues queryValues;
AuthenticationResult result;
if (request is OAuthRequestAuthorizationCode auth)
{
queryValues = QueryValues.Parse(StringUtils.RemovePrefix(responseUri.Query, "?"));
this.EnsureStateEquals(queryValues, request);
var accessTokenRequest = new OAuthTokenRequest();
accessTokenRequest.ClientSecret = auth.ClientSecret;
accessTokenRequest.Code = queryValues.Single("code");
accessTokenRequest.GrantType = "authorization_code";
accessTokenRequest.RedirectUri = auth.RedirectUri;
result = this.GetAuthenticationResult(accessTokenRequest);
}
else if (request is OAuthRequestTokenCode)
{
queryValues = QueryValues.Parse(HttpUtility.UrlDecode(StringUtils.RemovePrefix(responseUri.Fragment, "#")));
this.EnsureStateEquals(queryValues, request);
result = new AuthenticationResult(queryValues);
}
else
{
throw new ArgumentException("Invalid OAuthRequest Type", nameof(request));
}
return(result);
}
public void EnsureStateEquals(QueryValues queryValues, OAuthRequestCode request)
{
var requested = request.State;
if (requested == null)
{
return;
}
var responsed = queryValues.Single("state");
if (requested.Equals(responsed) == false)
{
throw new TwitchException($"OAuth state mismatched - Request:{requested} vs Response:{responsed})");
}
}
public string GetCodeAuthorizeUri(OAuthRequestCode request)
{
var apiRequest = new TwitchAPIRequest();
apiRequest.BaseUrl = "https://id.twitch.tv/oauth2/authorize";
apiRequest.Method = "GET";
apiRequest.QueryValues.Add("client_id", this.Parent.ClientId);
apiRequest.QueryValues.Add("response_type", request.ResponseType);
apiRequest.QueryValues.Add("redirect_uri", request.RedirectUri);
apiRequest.QueryValues.Add("scope", string.Join(OAuthRequest.ScopeSeparater, request.Scopes));
apiRequest.QueryValues.Add("force_verify", request.ForceVerify);
apiRequest.QueryValues.Add("state", request.State);
using (var response = this.Parent.Request(apiRequest))
{
return(response.ResponseUri.AbsoluteUri);
}
}
