string buildTokenRequestBody(string authCode, AuthState authState)
{
var sb = new StringBuilder();
sb.Append("grant_type=authorization_code");
sb.Append($"&code={authCode}");
sb.Append($"&client_id={Config.ClientId}");
sb.Append($"&redirect_uri={Uri.EscapeDataString(Config.RedirectUri.AbsoluteUri)}");
if (authState.Verifier != null)
{
sb.Append($"&code_verifier={authState.Verifier}");
}
return(sb.ToString());
}
async Task <BoolValue <AuthResult> > getAccessCode(string authCode, AuthState authState)
{
var body = buildTokenRequestBody(authCode, authState);
var uri = Config.TokenIssuer.AbsoluteUri;
var request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
request.ContentType = "application/x-www-form-urlencoded";
request.Accept = "Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
var bodyData = Encoding.ASCII.GetBytes(body);
request.ContentLength = bodyData.Length;
Log.DebugWebRequest(request, body);
var stream = request.GetRequestStream();
await stream.WriteAsync(bodyData, 0, bodyData.Length);
stream.Close();
Log?.DebugWebRequest(request, body);
try
{
var response = await request.GetResponseAsync();
var responseStream = response.GetResponseStream()
?? throw new Exception("Unexpected error: No response when requesting token.");
using (var r = new StreamReader(responseStream))
{
var text = await r.ReadToEndAsync();
Log?.DebugWebResponse(response as HttpWebResponse, text);
return(await buildAuthResultAsync(text));
}
}
catch (WebException webException)
{
var response = (HttpWebResponse)webException.Response;
return(BoolValue <AuthResult> .Fail($"Server error: {(int)response.StatusCode} {response.StatusCode.ToString().SplitCamelCase()}"));
}
catch (Exception ex)
{
return(BoolValue <AuthResult> .Fail($"Unexpected Server error: {ex}"));
}
}
