SL4 Facebook应用程序不再检索access_token [英] SL4 Facebook application no longer retrieves access_token
问题描述
我有一个SL4退出浏览器应用程序，该应用程序已经使用了几个月.截至目前，看来它不再能从Facebook上获取一个access_token了.我正在使用facebook-c#-sdk v4.1.1.一些部分代码发布在下面:
I have an SL4 Out of Browser application which has been working for several months. As of right now, it appears it will not longer retrieve an access_token from Facebook. I am using facebook-c#-sdk v4.1.1. Some partial code is posted below:
void FacebookLoginBrowser_Loaded(object sender, RoutedEventArgs e)
{
if (!loggedIn)
{
LoginToFacebook();
}
}
private void LoginToFacebook()
{
dynamic parms = new System.Dynamic.ExpandoObject();
parms.display = "popup";
parms.client_id = appId;
parms.redirect_uri = successUrl;
parms.cancel_url = failedUrl;
parms.scope = requestedFbPermissions;
parms.type = "user_agent";
loggingInUri = fbApp.GetLoginUrl(parms);
FacebookLoginBrowser.Source = (loggingInUri);
}
以下是浏览器重定向到的html页面的代码:
Below is the code for the html page the browser is redirected to:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title></title>
</head>
<body>
Complete
</body>
<script type="text/javascript">
window.external.notify(window.location.href);
</script>
</html>
然后javascript会触发以下内容:
The javascript then fires the following:
private void FacebookLoginBrowser_ScriptNotify(object sender, NotifyEventArgs e)
{
if (e.Value != "Failed")
{
string url = e.Value.Replace('#', '?');
url = HttpUtility.UrlDecode(url);
Uri ur = new Uri(url);
string[] str = ur.Query.Split('&');
access_token = str[0].Split('=')[1];
if(!String.IsNullOrEmpty(access_token)){
fbApp = new FacebookApp(access_token);
App app = (App)Application.Current;
app.Fuid.fbApp = fbApp;
loggedIn = true;
loginSucceeded(e);
}
}
if (fbApp.Session == null)
{
failedLogin();
}
}
似乎不再包含通常包含access_token值的查询字符串.使用Fiddler，我能够看到来自Facebook的重定向，该重定向确实包含access_token值.我不确定它在哪里丢失.让我知道是否有人需要任何其他信息.谢谢！
It appears the querystring which normally contains the access_token value is not longer there. Using Fiddler, I was able to see the redirect from facebook which does contain the access_token value. I am not sure where it is being lost at. Let me know if any one needs any additional information. Thanks!
推荐答案
Facebook关于查询字符串结构的行为已发生变化.在 http://facebooksdk.codeplex.com/discussions/261528 中对此进行了讨论.我的代码使用WPF而不是Silverlight.我不确定同一问题是否适用于Silverlight控件.
There has been a change in Facebook behavior regarding the structure of the query string. This is discussed in http://facebooksdk.codeplex.com/discussions/261528. My code uses WPF and not Silverlight; I'm not sure whether the same issue applies to the Silverlight control.
请注意，Facebook C#SDK的当前版本为 http://facebooksdk.codeplex.com/.
Note that the current version of Facebook C# SDK is 5.0.40 per http://facebooksdk.codeplex.com/.
另请参阅 Facebook客户端流是否仍然存在发出访问令牌?.
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