После 2 дней борьбы я решил проблему следующим образом, но я думаю, что она требует дальнейшего улучшения.
private string AccessToken
{
get { return (string)Session["GoogleAccessToken"]; }
set { Session["GoogleAccessToken"] = value; }
}
private InMemoryTokenManager TokenManager
{
get
{
var tokenManager = (InMemoryTokenManager)HttpContext.Application["GoogleTokenManager"];
if (tokenManager == null)
{
string consumerKey = ConfigurationManager.AppSettings["GoogleOAuthConsumerKey"];
string consumerSecret = ConfigurationManager.AppSettings["GoogleOAuthConsumerValue"];
if (!string.IsNullOrEmpty(consumerKey))
{
tokenManager = new InMemoryTokenManager(consumerKey, consumerSecret);
HttpContext.Application["GoogleTokenManager"] = tokenManager;
}
}
return tokenManager;
}
}
public ActionResult GoogleSync()
{
var google = new WebConsumer(GoogleConsumer.ServiceDescription, this.TokenManager);
// Is Google calling back with authorization?
var accessTokenResponse = google.ProcessUserAuthorization();
if (accessTokenResponse != null)
{
this.AccessToken = accessTokenResponse.AccessToken;
XDocument contactsDocument = GoogleConsumer.GetContacts(google, this.AccessToken, 5, 1);
var contactList = new List<GMailContact>();
foreach (var entry in contactsDocument.Root.Elements(XName.Get("entry", "http://www.w3.org/2005/Atom")))
{
GMailContact newContact = new GMailContact { Name = string.Empty, Email = string.Empty };
var titleElement = entry.Element(XName.Get("title", "http://www.w3.org/2005/Atom"));
if (titleElement != null)
newContact.Name = titleElement.Value;
var emailElement = entry.Element(XName.Get("email", "http://schemas.google.com/g/2005"));
if (emailElement != null && emailElement.Attribute("address") != null)
{
newContact.Email = emailElement.Attribute("address").Value;
}
contactList.Add(newContact);
}
////var contacts = from entry in contactsDocument.Root.Elements(XName.Get("entry", "http://www.w3.org/2005/Atom"))
//// select new { Name = entry.Element(XName.Get("title", "http://www.w3.org/2005/Atom")).Value,
//// Email = (XName.Get("email", "http://schemas.google.com/g/2005") == null ? "" : entry.Element(XName.Get("email", "http://schemas.google.com/g/2005")).Attribute("address").Value) };
return View(contactList);
}
else if (this.AccessToken == null)
{
// If we don't yet have access, immediately request it.
GoogleConsumer.RequestAuthorization(google, GoogleConsumer.Applications.Contacts);
return this.Content("");
}
else
{
return this.Content("synchronization failed.");
}
}