private object RequestCode(IServiceBase authService, IAuthSession session, AuthUserSession userSession, IAuthTokens tokens)
{
var state = Guid.NewGuid().ToString("N");
userSession.State = state;
var codeRequest = AuthorizeUrl + "?response_type=code&client_id={0}&redirect_uri={1}&scope={2}&state={3}"
.Fmt(ClientId, CallbackUrl.UrlEncode(), Scopes.Join(","), state);
if (!DomainHint.IsNullOrEmpty())
{
codeRequest += "&domain_hint=" + DomainHint;
}
if (!tokens.UserName.IsNullOrEmpty())
{
codeRequest += "&login_hint=" + tokens.UserName;
}
authService.SaveSession(session, SessionExpiry);
return(authService.Redirect(PreAuthUrlFilter(this, codeRequest)));
}
public override object Authenticate(IServiceBase authService, IAuthSession session, Authenticate request)
{
var tokens = Init(authService, ref session, request);
//Transfering AccessToken/Secret from Mobile/Desktop App to Server
if (request?.AccessToken != null)
{
//https://developer.github.com/v3/oauth_authorizations/#check-an-authorization
var url = VerifyAccessTokenUrl.Fmt(ClientId, request.AccessToken);
var json = url.GetJsonFromUrl(requestFilter: httpReq => {
httpReq.Headers[HttpRequestHeader.UserAgent] = ServiceClientBase.DefaultUserAgent;
httpReq.AddBasicAuth(ClientId, ClientSecret);
});
var isHtml = authService.Request.IsHtml();
var failedResult = AuthenticateWithAccessToken(authService, session, tokens, request.AccessToken);
if (failedResult != null)
{
return(ConvertToClientError(failedResult, isHtml));
}
return(isHtml
? authService.Redirect(SuccessRedirectUrlFilter(this, session.ReferrerUrl.SetParam("s", "1")))
: null); //return default AuthenticateResponse
}
var httpRequest = authService.Request;
//https://developer.github.com/v3/oauth/#common-errors-for-the-authorization-request
var error = httpRequest.QueryString["error"]
?? httpRequest.QueryString["error_uri"]
?? httpRequest.QueryString["error_description"];
var hasError = !error.IsNullOrEmpty();
if (hasError)
{
Logger.Error($"GitHub error callback. {httpRequest.QueryString}");
return(authService.Redirect(FailedRedirectUrlFilter(this, session.ReferrerUrl.SetParam("f", error))));
}
var code = httpRequest.QueryString["code"];
var isPreAuthCallback = !code.IsNullOrEmpty();
if (!isPreAuthCallback)
{
var scopes = Scopes.Join("%20");
string preAuthUrl = $"{PreAuthUrl}?client_id={ClientId}&redirect_uri={CallbackUrl.UrlEncode()}&scope={scopes}&state={Guid.NewGuid():N}";
this.SaveSession(authService, session, SessionExpiry);
return(authService.Redirect(PreAuthUrlFilter(this, preAuthUrl)));
}
try
{
string accessTokenUrl = $"{AccessTokenUrl}?client_id={ClientId}&redirect_uri={CallbackUrl.UrlEncode()}&client_secret={ClientSecret}&code={code}";
var contents = AccessTokenUrlFilter(this, accessTokenUrl).GetStringFromUrl();
var authInfo = PclExportClient.Instance.ParseQueryString(contents);
//GitHub does not throw exception, but just return error with descriptions
//https://developer.github.com/v3/oauth/#common-errors-for-the-access-token-request
var accessTokenError = authInfo["error"]
?? authInfo["error_uri"]
?? authInfo["error_description"];
if (!accessTokenError.IsNullOrEmpty())
{
Logger.Error($"GitHub access_token error callback. {authInfo}");
return(authService.Redirect(FailedRedirectUrlFilter(this, session.ReferrerUrl.SetParam("f", "AccessTokenFailed"))));
}
var accessToken = authInfo["access_token"];
return(AuthenticateWithAccessToken(authService, session, tokens, accessToken)
?? authService.Redirect(SuccessRedirectUrlFilter(this, session.ReferrerUrl.SetParam("s", "1")))); //Haz Access!
}
catch (WebException webException)
{
//just in case GitHub will start throwing exceptions
var statusCode = ((HttpWebResponse)webException.Response).StatusCode;
if (statusCode == HttpStatusCode.BadRequest)
{
return(authService.Redirect(FailedRedirectUrlFilter(this, session.ReferrerUrl.SetParam("f", "AccessTokenFailed"))));
}
}
return(authService.Redirect(FailedRedirectUrlFilter(this, session.ReferrerUrl.SetParam("f", "Unknown"))));
}
