Thank you Josey Baker, your solution works fine. But I don't understand why the old project (that one with old autenthication) after some days is working too. Very strange...
Il giorno giovedì 4 giugno 2015 18:06:48 UTC+2, josey baker ha scritto: > > After tearing my hair out for the last two days I thought I would post my > solution in getting this to work. I could not get the Service Account > solutions to work. It would authenticate but when i pulled a list of > albums it would return zero results and said I was forbidden to modify > albums when adding photos. > > tl:dr; I created a Web Application account and used that client id and > client secret to get a refesh token using the OAuth2 Playground. I then > store that refresh token in my application (it never expires) to get new > Access tokens whenever the application needs to authenticate. Here are my > steps below. And by the way, you all own me one.... :) > > *Google API OAuth2 Conversion* > > *Setting up the new credentials* > 1. Log into the Google developers console: > https://console.developers.google.com/project > If the site already has a google account use the one stored in the > web.config > 2. If there isn’t a project, click the Create Project button and give > it a name > 3. If the left hand menu select Credentials under the APIs and auth menu > 4. Under the OAuth heading select Create New Client ID > 5. Make sure Application Type = Web Application and click the Create > button > 6. Record the Client ID and the Client Secret (these will be added to > the web.config) > 7. Under the newly created Client ID for web application, select the > Edit settings button > 8. Add the following to the Authorized redirect URIs box: > https://developers.google.com/oauthplayground > 9. Click Update > *Creating your Token* > 10. Open a new tab and go to the OAuth2 playground: > https://developers.google.com/oauthplayground/ > 11. Click the gear button in the top right (configuration) > 12. Change to the following settings > > - OAuth Flow: Server-side > - OAuth endpoints: Google > - The 2 Endpoint fields – leave alone > - Access token location: Authorization header w/ Bearer prefix > - Access Type: Offline > - Force Approval Prompt: checked > - Use you own OAuth credentials: checked > - OAuth Client ID: Client ID that you created in step 6 above > - OAuth Client secret: Client Secret you created in step 6 above > > 13. Click the close link > 14. In the textbox for “Input your own scopes” paste the value: > https://picasaweb.google.com/data/ > 15. Select the Authorize APIs button > 16. Select the Accept button on the page that shows up > 17. This should take you to Step 2 in the OAuth playground > 18. Click the Exchange authorization code for tokens button > 19. The token boxes will fill in and take you to Step 3 in the > playground. > 20. Select Step 2 on the left hand side and record the Refresh Token > (this will be stored in the web.config file) > > *Integration* > Add the following values to the web.config settings > <add key="PicasaClientID" value="ClientID from step 6" /> > <add key="PicasaClientSecret" value="Client secret from Step 6" /> > <add key="PicasaToken" value="Refresh token from Step 20" /> > > *Code Logic* > Here is the new Authenticate function which will perform the > authentication using Google OAuth 2.0 and associate it with the ps_Picasa > Service class. Everything else will function as before. The Access Token > will be stored in the Application State and refreshed when it becomes > expired using the Refresh Token. > private bool AuthenticatePicasaServiceNonAsync() > { > try > { > var requestFactory = new GDataRequestFactory("My App User > Agent"); > > if(!ValidateToken()) > { > GetNewAccessToken(); > } > > > requestFactory.CustomHeaders.Add(string.Format("Authorization: Bearer {0}", > HttpContext.Current.Application["AccessToken"])); > > ps_Picasa = new PicasaService(str_PicasaApplicationName); > ps_Picasa.RequestFactory = requestFactory; > > return true; > } > catch (Exception exc) > { > return false; > } > } > private void GetNewAccessToken() > { > try > { > string Url = "https://accounts.google.com/o/oauth2/token";; > string grant_type = "refresh_token"; > //string redirect_uri_encode = > UrlEncodeForGoogle(ReturnUrl); > string data = > "client_id={0}&client_secret={1}&refresh_token={2}&grant_type={3}"; > > HttpWebRequest request = HttpWebRequest.Create(Url) as > HttpWebRequest; > string result = null; > request.Method = "POST"; > request.KeepAlive = true; > request.ContentType = "application/x-www-form-urlencoded"; > string param = string.Format(data, str_PicasaClientID, > str_PicasaSecret, str_PicasaToken, grant_type); > var bs = Encoding.UTF8.GetBytes(param); > using (Stream reqStream = request.GetRequestStream()) > { > reqStream.Write(bs, 0, bs.Length); > } > > using (WebResponse response = request.GetResponse()) > { > var sr = new > StreamReader(response.GetResponseStream()); > result = sr.ReadToEnd(); > sr.Close(); > } > > var jsonSerializer = new JavaScriptSerializer(); > var TokenData = > jsonSerializer.Deserialize<GoogleTokenModel>(result); > > > > HttpContext.Current.Application["AccessToken"] = > TokenData.Access_Token; > > } > catch > { > throw; > } > } > > private bool ValidateToken() > { > try > { > > string apiURL = " > https://www.googleapis.com/oauth2/v1/tokeninfo";; > string data = "access_token={0}"; > > HttpWebRequest request = HttpWebRequest.Create(apiURL) as > HttpWebRequest; > string result = null; > request.Method = "POST"; > request.KeepAlive = true; > request.ContentType = "application/x-www-form-urlencoded"; > string param = string.Format(data, > HttpContext.Current.Application["AccessToken"]); > var bs = Encoding.UTF8.GetBytes(param); > using (Stream reqStream = request.GetRequestStream()) > { > reqStream.Write(bs, 0, bs.Length); > } > > using (WebResponse response = request.GetResponse()) > { > var sr = new > StreamReader(response.GetResponseStream()); > result = sr.ReadToEnd(); > sr.Close(); > } > > var jsonSerializer = new JavaScriptSerializer(); > var TokenData = > jsonSerializer.Deserialize<GoogleTokenInfo>(result); > > if (string.IsNullOrEmpty(TokenData.error)) > { > if (TokenData.audience != str_PicasaClientID) > return false; > > return true; > } > return false; > } > catch (Exception) > { > > return false; > } > } > > } > > public class GoogleTokenModel > { > public string Access_Token { get; set; } > public string Refresh_Token { get; set; } > public string Expires_In { get; set; } > public string Token_Type { get; set; } > } > > public class GoogleTokenInfo > { > public string audience { get; set; } > public string user_id { get; set; } > public string scope { get; set; } > public string expires_in { get; set; } > public string error { get; set; } > } > > > > > > > > > -- You received this message because you are subscribed to the Google Groups "Google Picasa Web Albums API" group. 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