public IActionResult SignIn()
{
GoogleOAuthParameters gauth = new GoogleOAuthParameters();
List <KeyValuePair <string, string> > requestParams = new List <KeyValuePair <string, string> >();
requestParams.Add(new KeyValuePair <string, string>("response_type", gauth.response_type));
requestParams.Add(new KeyValuePair <string, string>("client_id", gauth.client_id));
requestParams.Add(new KeyValuePair <string, string>("redirect_uri", HttpUtility.UrlEncode(gauth.redirect_uri)));
requestParams.Add(new KeyValuePair <string, string>("scope", gauth.scope));
//requestParams.Add(new KeyValuePair<string, string>("prompt", gauth.prompt));
requestParams.Add(new KeyValuePair <string, string>("access_type", gauth.access_type));
StringBuilder builder = new StringBuilder();
builder.Append(gauth.url);
for (int i = 0; i < requestParams.Count; i++)
{
if (i != 0)
{
builder.Append("&");
}
builder.Append(string.Format("{0}={1}", requestParams[i].Key, requestParams[i].Value));
}
return(Redirect(builder.ToString()));
}
public async Task <ActionResult> OAuthCallback(string code)
{
GoogleOAuthParameters googleOAuthParameters = new GoogleOAuthParameters();
HttpClient client = new HttpClient();
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "https://oauth2.googleapis.com/token");
List <KeyValuePair <string, string> > formValues = new List <KeyValuePair <string, string> >();
formValues.Add(new KeyValuePair <string, string>("code", code));
formValues.Add(new KeyValuePair <string, string>("client_id", googleOAuthParameters.client_id));
formValues.Add(new KeyValuePair <string, string>("client_secret", googleOAuthParameters.client_secret));
formValues.Add(new KeyValuePair <string, string>("redirect_uri", googleOAuthParameters.redirect_uri));
formValues.Add(new KeyValuePair <string, string>("grant_type", "authorization_code"));
request.Content = new FormUrlEncodedContent(formValues);
HttpResponseMessage response = await client.SendAsync(request);
if (response.IsSuccessStatusCode)
{
string responseBody = await response.Content.ReadAsStringAsync();
GoogleTokenResponse token = JsonConvert.DeserializeObject <GoogleTokenResponse>(responseBody);
HttpRequestMessage userProfileRequest = new HttpRequestMessage(HttpMethod.Get, "https://www.googleapis.com/oauth2/v2/userinfo");
userProfileRequest.Headers.Add("Authorization", "Bearer " + token.access_token);
HttpResponseMessage userProfileResponse = await client.SendAsync(userProfileRequest);
if (userProfileResponse.IsSuccessStatusCode)
{
string userProfileJson = await userProfileResponse.Content.ReadAsStringAsync();
GoogleUserProfile userProfile = JsonConvert.DeserializeObject <GoogleUserProfile>(userProfileJson);
return(RedirectToAction("Index", "Home"));
}
else
{
return(RedirectToAction("Error", "Home"));
}
}
else
{
return(RedirectToAction("Error", "Home"));
}
}
