I don't think the .NET client library supported three-legged OAuth at this time; only two-legged OAuth. I would bring it up in the .NET client library forum:
http://groups.google.com/group/gdata-dotnet-client-library Cheers, -Jeff On Mon, Apr 13, 2009 at 11:35 PM, isyndica <[email protected]> wrote: > > Hi, > > I have a working implementation using AuthSub and the Google API > library working fine, but I'd really like to use OAuth, if anythign to > learn it a bit. > > I managed to get the authentication loop working with: > > // Part 1 :: Getting a token and getting it authorized > > string consumerKey = "consumer key from registered application"; > string consumerSecretKey = "consumer secret key from registered > application"; > > OAuthUtil oou = new OAuthUtil(); > string oauth_nonce = oou.GenerateNonce(); > string oauth_timestamp = oou.GenerateTimeStamp(); > string oauth_normalized_url; > string oauth_normalized_params; > > string oauth_signature = oou.GenerateSignature(new Uri("https:// > www.google.com/accounts/OAuthGetRequestToken?scope=" + > Uri.EscapeDataString("http://picasaweb.google.com/data/";)), > consumerKey, consumerSecret, null, null, "GET", oauth_timestamp, > oauth_nonce, OAuthUtil.SignatureTypes.HMACSHA1, out > oauth_normalized_url, out oauth_normalized_params); > > string getTokenUrl = oauth_normalized_url + "?" + > oauth_normalized_params + "&" + Uri.EscapeDataString > ("oauth_signature") + "=" + Uri.EscapeDataString(oauth_signature); > > NameValueCollection oauthtokendata = null; > HttpWebRequest request = WebRequest.Create(tbLoginUrl.Text) as > HttpWebRequest; > using (HttpWebResponse response = request.GetResponse() as > HttpWebResponse) > { > using (TextReader reader = new StreamReader > (response.GetResponseStream())) > { > oauthtokendata = HttpUtility.ParseQueryString(reader.ReadToEnd > ()); > } > } > > string authorizeTokenUrl = "https://www.google.com/accounts/ > OAuthAuthorizeToken?oauth_token=<https://www.google.com/accounts/%0AOAuthAuthorizeToken?oauth_token=>" > + Uri.EscapeDataString(oauthtokendata > ["oauth_token"]) + "&oauth_callback=" + Uri.EscapeDataString("https:// > mydomain.com/google.auth.callback?s=picasa&"); > > Then in the callback page: > > // Part 2 :: Converting the token to an access token > > OAuthUtil oou = new OAuthUtil(); > string oauth_nonce = oou.GenerateNonce(); > string oauth_timestamp = oou.GenerateTimeStamp(); > string oauth_normalized_url; > string oauth_normalized_params; > > string token = "oauth_token from querystring"; > string token_secret = "oauth secret from query string"; > > string oauth_signature = oou.GenerateSignature(new Uri("https:// > www.google.com/accounts/OAuthGetAccessToken"), consumerKey, > consumerSecret, Uri.EscapeDataString(token), token_secret, "GET", > oauth_timestamp, oauth_nonce, OAuthUtil.SignatureTypes.HMACSHA1, out > oauth_normalized_url, out oauth_normalized_params); > > string convertTokenUrl = oauth_normalized_url + "?" + > oauth_normalized_params + "&" + Uri.EscapeDataString > ("oauth_signature") + "=" + Uri.EscapeDataString(oauth_signature); > > NameValueCollection oauthtokendata = null; > HttpWebRequest request = WebRequest.Create(convertTokenUrl) as > HttpWebRequest; > using (HttpWebResponse response = request.GetResponse() as > HttpWebResponse) > { > using (TextReader reader = new StreamReader > (response.GetResponseStream())) > { > oauthtokendata = HttpUtility.ParseQueryString(reader.ReadToEnd > ()); > } > } > string oauth_access_token = oauthtokendata["oauth_token"]; > string oauth_access_token_secret = oauthtokendata > ["oauth_token_secret"]; > > > > Fine... so this is working perfect (and might be useful if anyone was > looking for an example in C#, since I couldn't really find any). > > But now... I have no clue how I'm supposed to do the Upload anymore. > This is what I did with AuthSub: > > GAuthSubRequestFactory authFactory = new GAuthSubRequestFactory("lh2", > "mydomain.com"); > // We assign the RSA key for request encryption - that's a special > function that would decrypt the key from my certificate as uploaded > when registering the application > authFactory.PrivateKey = getRsaKey(); > > // We set the token (long term session token) > authFactory.Token = "the access token AuthSub had given me after > conversion"; > > PicasaService service = new PicasaService(consumerKey); // > authFactory.ApplicationName); > service.RequestFactory = authFactory; > > // Upload for the user associated to the token and into the "Drop Box" > Uri postUri = new Uri(PicasaQuery.CreatePicasaUri("default", > "default")); > > // Format the path to the file to upload - for our exampe this is the > "testupload.jpg" file that's copied along side the program in the > output folder > string sourceFilePath = Path.Combine(GetRunnginAssemblyPath > (),"testupload.jpg"); > > // Open a read stream to the file > string uploadedPhotoId = ""; > using (FileStream stream = new FileStream(sourceFilePath, > FileMode.Open, FileAccess.Read)) > { > // Use the "Insert" method on the service to upload the file > PicasaEntry entry = (PicasaEntry)service.Insert(postUri, stream, > "image/jpeg", sourceFilePath); > PhotoAccessor pa = new PhotoAccessor(entry); > // For information, write out the PhotoId of the newly added image > uploadedPhotoId = pa.Id; > } > > return uploadedPhotoId; > > > Boom - that worked beautifully. But I have no clue how to use OAuth > instead of OAuthSub there and couldn't find any .NET example. The > only upload example I have is with JRuby where the OAuth subsystem > seems to feature two "Token" and "TokenSecret" properties that... Are > inexistent with the .NET implementation. > > I went so far as this: > GOAuthRequestFactory authFactory = new GOAuthRequestFactory("lh2", > consumerKey); > authFactory.ConsumerKey = consumerKey; > authFactory.ConsumerSecret = consumerSecret; > > But that's clearly not enough (the token is associated nowhere). > > I also tried using the AuthSub factory with the OAuth token (as I keep > reading it supposedly works), but... it doesn't work: keep getting > 403s. > > What am I missing? > > Any help is most welcome. > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google Picasa Web Albums API" group. 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