无法从Facebook获取访问令牌。 OAuthException表示“验证验证码错误” [英] Unable to get access token from Facebook. Got an OAuthException says "Error validating verification code"

问题描述

我正在使用java，我的演示应用程序的目的很简单：更新用户状态。
我按照 http://developers.facebook.com/上的服务器端流文档/认证。我得到了auth对话框，Facebook导致回调URL，我在回调页面中得到了代码。然后当我尝试生成访问令牌时，我失败了。

在指南页面中，它说以下URL可用于生成访问令牌：

  https://graph.facebook.com/oauth/access_token？ 
 client_id = YOUR_APP_ID& redirect_uri = YOUR_URL& 
 client_secret = YOUR_APP_SECRET& code = THE_CODE_FROM_ABOVE 
  

但是，在我的环境中会发生什么以下错误消息：

  {
error：{
type：OAuthException 
message：验证验证码错误。 
} 
} 
  

我确信每个参数都是正确的，因为如果我更改client_id值或client_secret参数，我将收到一个不同的错误消息。代码参数是我从Facebook回调获得的。所以这应该是对的，对吧？真的不明白是什么问题....

有什么想法吗？我被困在这里...

解决方案

我最近处理了这个问题：一切都匹配，但是与OAuthException失败。使它工作的事情是改变重定向uri（在两个请求的流程）从：

http://foo.example.com

至

http://foo.example.com/

即可添加尾部斜线。然后它工作。愚蠢和愚蠢，但你去。

I am using java and the purpose of my demo application is simple: Update user status. I followed the Server-side Flow on page http://developers.facebook.com/docs/authentication. I got the auth dialog, facebook lead to the callback url and I got the code in my callback page. Then I failed when I try to generate an access token.

In the guide page, it says the following url could be used to generated an access token:

https://graph.facebook.com/oauth/access_token?
     client_id=YOUR_APP_ID&redirect_uri=YOUR_URL&
     client_secret=YOUR_APP_SECRET&code=THE_CODE_FROM_ABOVE

But what happens in my environment is I got the following error message:

{
   "error": {
      "type": "OAuthException",
      "message": "Error validating verification code."
   }
}

I am quite sure every parameter is correct because if I change the client_id value or client_secret parameter, I will got a different error message. The code parameter is what I got from facebook callback. So this should be correct, right? Really can't figure out what is the problem....

Any idea about this? I get stuck here...

解决方案

I recently dealt with exactly this problem: everything matched, but it failed with the OAuthException. The thing that made it work was to change the redirect uri (in both requests for the flow) from:

http://foo.example.com

to

http://foo.example.com/

I.e., add the trailing slash. And then it worked. Stupid and silly, but there you go.

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