public async Task <DiscordToken> GetTokenAsync(string returnUrl, string code, string state)
{
if (Oauth2State.Matches(state))
{
var request = new HttpRequestMessage()
{
RequestUri = new Uri($"{Http.BaseAddress}oauth2/token"),
Method = HttpMethod.Post
};
request.Content = new FormUrlEncodedContent(new Dictionary <string, string>()
{
{ "client_id", Settings.DiscordClientId },
{ "client_secret", Settings.DiscordClientSecret },
{ "grant_type", "authorization_code" },
{ "code", code },
{ "redirect_uri", returnUrl },
{ "scope", _scope }
});
request.Content.Headers.ContentType = new MediaTypeHeaderValue("application/x-www-form-urlencoded");
var response = await Http.SendAsync(request);
if (response.IsSuccessStatusCode)
{
var result = await response.Content.ReadFromJsonAsync <TokenResponse>();
try
{
double seconds = result.expires_in;
var token = new DiscordToken()
{
AccessToken = result.access_token,
TokenType = result.token_type,
Expires = DateTime.UtcNow.AddSeconds(seconds),
RefreshToken = result.refresh_token,
Scope = result.scope
};
// Get the Discord Id associated with this request
var user = await GetUserAsync(token.AccessToken);
token.DiscordId = user.DiscordId;
token.DiscordUser = user;
// FIXME: probably move more of the Discord API work to different library
return(token);
}
catch (Exception)
{
// FIXME: more specific exception
throw new Exception("Failed to obtain token for request.");
}
}
else
{
var error = await request.Content.ReadAsStringAsync();
// FIXME: InvalidOperationException for this
throw new Exception("Failed to obtain token for request. " + error);
}
}
else
{
// FIXME: custom exception for this
throw new InvalidOperationException("OAuth request was not initiated by this server.");
}
}
public DiscordOauth2(ISettings settings, DiscordHttpClient http, Oauth2State state)
{
Http = http;
Settings = settings;
Oauth2State = state;
}