private async Task SignIn(string username)
{
string hash;
using (var md5 = MD5.Create()) {
hash = BitConverter.ToString(md5.ComputeHash(Encoding.UTF8.GetBytes(username))).Replace("-", "").ToLower();
}
var user = new User {
Username = username,
Name = username,
Email = username,
ImageUrl = $"https://www.gravatar.com/avatar/{hash}"
};
await authority.SignIn(user, HttpContext);
}
public async Task <IActionResult> GetRedirect(string code)
{
using (var httpClient = new HttpClient()) {
string accessUrl = $"https://slack.com/api/oauth.access?client_id={config.SlackClientId}&client_secret={config.SlackSecret}&code={code}&redirect_uri={GetRedirectUrl()}";
var response = await httpClient.GetAsync(accessUrl);
response.EnsureSuccessStatusCode();
var resultBody = await response.Content.ReadAsStringAsync();
var result = DeserializeResultBody(resultBody);
if (!result.Ok)
{
throw new InvalidOperationException();
}
var principal = await authority.SignIn(result.User, HttpContext);
await userRepository.CreateUserIfNotExists(principal);
return(Redirect("/"));
}
}